Steel insert plastic dash panel cross beam

Abstract

The present invention provides a dash cross member of a steel insert plastic, which is formed by injection-molding a steel insert including a main beam, a center support frame and the like with a plastic material and is formed in a form in which the steel insert and a plastic injection-molded part are combined, thereby enabling the reduction in weight of an electric vehicle, the improvement in electrical efficiency, and the increase in dynamic stiffness. The phenomena of damage and deformation caused by collision energy can be prevented, and the performance of isolating road surface vibration can be improved.

Description

Technical Field

[0001] The present invention relates to a steel insert plastic cowl crossbar, and more particularly to a steel insert plastic cowl crossbar for automobiles having a new structure in which a steel insert and a plastic injection molded portion are combined by injection molding a steel insert with a plastic material. Background Art

[0002] Generally, a cockpit module of a car refers to a pre-assembled integrated and modular component including a cowl crossbar, a crash pad, an air conditioning system, an instrument panel, an airbag, a steering column, etc.

[0003] The above-mentioned front panel cross beam is one of the components that make up the cockpit module. It is arranged horizontally in front of the driver's seat and the co-driver's seat, and the end portions on both sides are fixed to the left and right side panels of the vehicle body by mounting frames, etc., serving as a skeleton to support the cushions, air-conditioning ducts, instrument panels, airbags, steering columns, etc. that make up the cockpit module.

[0004] In addition, the dash cross member has the function of preventing the vehicle body from bending or twisting in the left-right direction and absorbing collision energy generated by a collision accident to protect the occupants.

[0005] As a prior art, the above-mentioned dash panel cross beam is usually made of steel material with excellent tensile strength and elongation, or made of plastic material suitable for lightweighting of vehicles.

[0006] However, although the dash beam made of the above-mentioned steel material has the advantage of easily absorbing collision energy due to its excellent tensile strength and elongation, it is too heavy and is not suitable for achieving lightweighting of the vehicle. In particular, there is the problem of increasing the weight of electric vehicles and reducing the electrical efficiency (km / Kwh).

[0007] In addition, the dash beam made of the above-mentioned plastic material is lighter than that of steel material, thereby achieving lightweight electric vehicles and improved electrical efficiency (km / Kwh), etc. However, there are the following problems: insufficient strength and elongation, damage due to collision energy generated by a collision accident, and easy deformation toward the inside of the vehicle due to collision energy, causing injury to occupants. Summary of the invention

[0008] The object of the present invention is to provide a steel-insert plastic dash panel cross beam to solve the problems raised in the above-mentioned background technology. The steel-insert plastic dash panel cross beam is formed by injection molding a steel insert including a main beam and a center support frame with a plastic material to form a form in which the steel insert is combined with the plastic injection molding part, thereby achieving lightweight electric vehicles and improving electrical efficiency. By increasing dynamic stiffness, it can prevent damage and deformation due to collision energy, and can improve the insulation performance against road vibration.

[0009] An embodiment of the present invention for achieving the above-mentioned purpose provides a front panel cross beam of a steel-insert plastic, characterized in that it includes: a steel insert, which includes a main beam and a center support frame assembled on the main beam; and a plastic injection molding part, which is injection-molded on the above-mentioned steel insert, wherein the above-mentioned center support frame includes a main frame, a neck frame, and a first assembly plate and a second assembly plate, the main frame is assembled on the lower part of the vehicle body, the neck frame is formed on the upper part of the main frame, the first assembly plate and the second assembly plate are formed on the upper part of the neck frame and assembled on the above-mentioned main beam, and a through hole for forming and removing the mold of the vehicle body mounting frame is formed in the above-mentioned main beam and the second assembly plate along the front-to-back direction, and the above-mentioned plastic injection molding part includes: a main injection molding part, which is formed to overlap with the above-mentioned main beam and the first assembly plate and the second assembly plate; and a vehicle body mounting frame, which closes the above-mentioned through hole and is formed to overlap with the main beam and the second assembly plate and protrudes forward.

[0010] In one embodiment of the present invention, it is characterized in that the above-mentioned central support frame also includes a connecting plate, which connects the above-mentioned first assembly plate and the second assembly plate into one body and is assembled to the above-mentioned main beam.

[0011] In another embodiment of the present invention for achieving the above-mentioned purpose, a steel-insert plastic front panel cross beam is provided, characterized in that it includes: a steel insert, which includes a main beam and a center support frame assembled on the main beam; and a plastic injection molding part, which is injection molded on the above-mentioned steel insert, wherein the above-mentioned center support frame includes a main frame, a neck frame and a first assembly plate and a second assembly plate, the main frame is assembled on the lower part of the vehicle body, the neck frame is formed on the upper part of the main frame, the first assembly plate and the second assembly plate are formed on the upper part of the neck frame and assembled on the above-mentioned main beam, and the above-mentioned plastic injection molding part includes: a main injection molding part, which is formed overlapping with the above-mentioned main beam and the first assembly plate and the second assembly plate; and a vehicle body mounting frame, which is formed overlapping with the above-mentioned main beam and the second assembly plate and protrudes forward.

[0012] In another embodiment of the present invention, it is characterized in that the above-mentioned central support frame also includes a connecting plate, which connects the above-mentioned first assembly plate and the second assembly plate into one body and is assembled to the above-mentioned main beam.

[0013] In another embodiment of the present invention for achieving the above-mentioned purpose, there is provided a front panel cross beam of a steel-insert plastic, characterized in that it includes: a steel insert, which includes a main beam and a center support frame assembled on the main beam; and a plastic injection molding part, which is injection-molded on the above-mentioned steel insert, wherein the above-mentioned center support frame includes a main frame, a neck frame and a first assembly plate and a second assembly plate, the main frame is assembled on the lower part of the vehicle body, the neck frame is formed on the upper part of the main frame, the first assembly plate and the second assembly plate are formed on the upper part of the above-mentioned neck frame and assembled on the above-mentioned main beam, and a weight-reducing hole for removing the mold and absorbing the impact is formed through the upper part of the above-mentioned main beam and the second assembly plate along the up and down direction, and the above-mentioned plastic injection molding part includes: a main injection molding part, which is formed in an overlapping manner with the above-mentioned main beam and the first assembly plate and the second assembly plate; a vehicle body mounting frame, which opens the above-mentioned weight-reducing hole and is formed in an overlapping manner with the main beam and the second assembly plate and protrudes forward; and a cockpit mounting frame, which is formed on one side of the above-mentioned neck frame and protrudes rearward.

[0014] In another embodiment of the present invention, the central support frame further comprises a connecting plate, which connects the first assembly plate and the second assembly plate into one body and is assembled to the main beam.

[0015] Through the above technical means, the present invention has the following effects.

[0016] First, steel inserts including a main beam and a center support frame are injection molded with plastic material to form a combination of the steel insert and the plastic injection molded portion, thereby making it possible to reduce the weight of the electric vehicle and improve the electrical efficiency.

[0017] Furthermore, the main beam of the steel insert is made of a "C"-shaped cross-sectional structure, which can achieve further weight reduction compared with the case where the main beam of the conventional dash cross beam made of steel material is made in a tube shape.

[0018] Secondly, the dash cross member is made into a combination of a steel insert and a plastic injection molded part, thereby increasing the dynamic rigidity compared to the existing dash cross member made of steel, thereby preventing damage and deformation due to collision energy generated by a collision accident.

[0019] Third, the dash cross member is made into a combination of a steel insert and a plastic injection molded portion, thereby improving the isolation performance against road vibration compared to the existing dash cross member made of steel material, thereby reducing the vibration transmitted to the steering wheel. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 1 is a perspective view showing a steel insert of a dash cross member according to a first embodiment of the present invention.

[0021] Figure 2 It is an enlarged perspective view showing a main part of a steel insert of a dash cross member according to the first embodiment of the present invention.

[0022] Figure 3 1 is a perspective view showing a steel-inserted plastic dash cross member according to a first embodiment of the present invention.

[0023] Figure 4 1 is an enlarged perspective view showing a main part of a dash cross member having a steel insert and plastic according to a first embodiment of the present invention.

[0024] Figure 5 It is along Figure 4 The cross-sectional view obtained along the AA line.

[0025] Figure 6 It is along Figure 4 Cross-sectional view obtained along line BB.

[0026] Figure 7 It is along Figure 4 Cross-sectional view obtained along the CC line.

[0027] Figure 8 It is along Figure 4 Cross-sectional view obtained from line DD.

[0028] Fig. 9 1 is a perspective view showing a steel insert of a dash cross member according to a second embodiment of the present invention.

[0029] Fig.10 It is an enlarged perspective view showing a main part of a steel insert of a dash cross member according to a second embodiment of the present invention.

[0030] Fig.11 1 is a perspective view showing a steel-inserted plastic dash cross member according to a second embodiment of the present invention.

[0031] Fig.12 1 is an enlarged perspective view showing a main part of a dash cross member having a steel insert and plastic according to a second embodiment of the present invention.

[0032] Fig.13 It is along Fig.12 The cross-sectional view obtained along the AA line.

[0033] Fig.14 It is along Fig.12 Cross-sectional view obtained along line BB.

[0034] Fig.15 It is along Fig.12 Cross-sectional view obtained along the CC line.

[0035] Fig.16 It is along Fig.12 Cross-sectional view obtained from line DD.

[0036] Fig.17 1 is a perspective view showing a steel insert of a dash cross member according to a third embodiment of the present invention.

[0037] Fig.18 It is an enlarged perspective view showing a main part of a steel insert of a dash cross member according to a third embodiment of the present invention.

[0038] Fig.19 1 is a perspective view showing a steel-inserted plastic dash cross member according to a third embodiment of the present invention.

[0039] Fig. 20 1 is an enlarged perspective view showing a main part of a dash cross member having a steel insert and plastic according to a third embodiment of the present invention.

[0040] Fig.21 It is along Fig. 20 The cross-sectional view obtained along the AA line.

[0041] Fig. 22 It is along Fig. 20 Cross-sectional view obtained along line BB.

[0042] Fig.23A and Fig. 23B It is along Fig. 20 Cross-sectional view obtained along the CC line.

[0043] Fig.24 It is along Fig. 20 Cross-sectional view obtained from line DD.

[0044] Fig.25 1 is a perspective view showing a steel insert of a dash cross member according to a fourth embodiment of the present invention.

[0045] Fig.26 It is an enlarged perspective view showing a main part of a steel insert of a dash cross member according to a fourth embodiment of the present invention.

[0046] Fig. 27 1 is an enlarged perspective view showing a steel-inserted plastic dash cross member according to a fourth embodiment of the present invention.

[0047] Fig.28 1 is an enlarged perspective view showing a main part of a dash cross member having a steel insert and plastic according to a fourth embodiment of the present invention.

[0048] Fig.29 It is along Fig.28 The cross-sectional view obtained along the AA line.

[0049] Fig.30 It is along Fig.28 Cross-sectional view obtained along line BB.

[0050] Fig.31A and Fig.31B It is along Fig.28 Cross-sectional view obtained along the CC line.

[0051] Fig.32 It is along Fig.28 Cross-sectional view obtained from line DD.

[0052] Fig.33 1 is a perspective view showing a steel insert of a dash cross member according to a fifth embodiment of the present invention.

[0053] Fig.34 It is an enlarged perspective view showing a main part of a steel insert of a dash cross member according to a fifth embodiment of the present invention.

[0054] Fig.35 1 is a perspective view showing a steel-inserted plastic dash cross member according to a fifth embodiment of the present invention.

[0055] Fig.36 1 is an enlarged perspective view showing a main part of a steel-inserted plastic dash cross member according to a fifth embodiment of the present invention.

[0056] Fig.37 It is along Fig.36 The cross-sectional view obtained along the AA line.

[0057] Fig.38 It is along Fig.36 Cross-sectional view obtained along line BB.

[0058] Fig.39 It is along Fig.36 Cross-sectional view obtained along the CC line.

[0059] Fig.40 It is along Fig.36 Cross-sectional view obtained from line DD.

[0060] Fig.41 1 is a perspective view showing a steel insert of a dash cross member according to a sixth embodiment of the present invention.

[0061] Fig.42 It is an enlarged perspective view showing a main part of a steel insert of a dash cross member according to a sixth embodiment of the present invention.

[0062] Fig.43 1 is a perspective view showing a steel-inserted plastic dash cross member according to a sixth embodiment of the present invention.

[0063] Fig.44 1 is an enlarged perspective view showing a main part of a dash cross member having a steel insert and plastic according to a sixth embodiment of the present invention.

[0064] Fig.45 It is along Fig.44 The cross-sectional view obtained along the AA line.

[0065] Fig.46 It is along Fig.44 Cross-sectional view obtained along line BB.

[0066] Fig.47 It is along Fig.44 Cross-sectional view obtained along the CC line.

[0067] Fig.48 It is along Fig.44 Cross-sectional view obtained from line DD.

[0068] Fig.49 This is an enlarged perspective view of the main part showing the fracture guide groove formed on the vehicle body mounting frame of the plastic injection molded portion of the steel-inserted plastic dash cross member according to the first to sixth embodiments of the present invention.

[0069] Fig.50 It is a perspective view showing that the steel insert of the steel-insert plastic dash cross member according to the first to sixth embodiments of the present invention is also formed with a steering gear lower side mounting frame.

[0070] Fig.51 and Fig.52 is Fig.50 A three-dimensional view showing a state in which a plastic injection-molded bracket is injection-molded on the steering gear lower side mounting frame shown.

[0071] Description of Reference Numerals

[0072] 100: dash cross member 200: steel insert

[0073] 210: Main beam 220: Center support frame

[0074] 221: Main frame 222: Neck frame

[0075] 222-1: Forming hole 222-2: Bending part

[0076] 223: First assembly plate 224: Second assembly plate

[0077] 225: Connecting plate 226: Through hole

[0078] 227: Weight reduction hole 228: Plastic weight reduction mold

[0079] 230: Steering gear lower side mounting frame 231: Steel bar

[0080] 232: Deformation guide hole 234: Floating nut

[0081] 300: Plastic injection molding part 310: Main injection molding part

[0082] 311: Protective body 320: Body mounting bracket

[0083] 321: Reinforcement plate 322: Reinforcement rib

[0084] 323: Body assembly plate 324: Fracture guide groove

[0085] 325-1, 325-2, 325-3: Mold removal space in the front and rear directions

[0086] 326: Up and down direction mold removal space 327: Filling part

[0087] 327-1: Weight reduction groove 328: Mold core

[0088] 329: Impact absorbing plate 329-1: Plastic weight reduction groove

[0089] 330: Cockpit mounting bracket 330-1: Cockpit mounting bracket

[0090] 340: Plastic injection molded bracket 341: First injection molded bracket part

[0091] 342: second injection-molded bracket portion 343: step portion. DETAILED DESCRIPTION

[0092] The specific structures and functional descriptions described in the embodiments of this specification are only used to illustrate the embodiments of the technical ideas according to the present invention. The embodiments of the technical ideas according to the present invention can be implemented in various ways and should not be interpreted as the invention being limited to the embodiments described in this specification. It should be understood that all variations, equivalent embodiments and even alternative embodiments of the embodiments disclosed in the specification are included within the scope of the ideas and technology of the present invention.

[0093] In this specification, the terms "first" and / or "second" may be used to describe various elements, but these elements are not limited by the above terms. The above terms are used only for the purpose of distinguishing one element from other elements. For example, within the scope of the claims that do not deviate from the technical concept of the present invention, the first element may be named as the second element, and similarly, the second element may also be named as the first element.

[0094] In this specification, when it is recorded that a certain element is "connected" or "contacting" another element, it should be understood that it can be directly connected to the other element or indirectly connected, or there can be other elements in between. On the contrary, when it is recorded that a certain element is "directly connected" or "directly contacting" another element, it should be understood that there are no other elements in between. Other descriptions used to illustrate the relationship between the elements, such as "between" and "just between" or "adjacent to" and "directly adjacent to", etc., should also be interpreted in the same way.

[0095] Throughout this specification, the same reference numerals represent the same elements. The terms used in this specification are intended to describe embodiments and are not intended to limit the present invention. In this specification, unless the context clearly indicates a different meaning, the singular expression includes the plural expression. The terms "comprises" or "comprising" used in this specification do not exclude the presence or addition of one or more components, steps, operations and / or elements mentioned.

[0096] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0097] First embodiment

[0098] Figure 1 and Figure 2 is a perspective view showing a steel insert of a dash cross member according to a first embodiment of the present invention, Figure 3 and Figure 4 1 is a perspective view showing a steel-inserted plastic dash cross member according to a first embodiment of the present invention.

[0099] The steel-insert plastic dash beam 100 according to the first embodiment of the present invention is manufactured in the following manner: when the steel insert is inserted into the cavity of the injection mold, plastic material is injected into the cavity of the injection mold at a predetermined pressure, thereby manufacturing a combination of the steel insert 200 and the plastic injection molded part 300.

[0100] like Figure 1 As shown, the steel insert 200 includes: a main beam 210 made of a "C"-shaped cross-sectional structure open toward the front; a center support frame 220 connected to a predetermined position on the rear surface of the main beam 210 and extending downward; and a steering gear lower side mounting frame 230 connected to a predetermined position on the front part of the main beam 210 and protruding toward the front.

[0101] The main beam 210 is disposed in the left and right lateral directions in front of the driver's seat and the passenger seat, and both side ends are assembled and fixed to the left and right side panels of the vehicle body to maintain the rigidity of the dash cross beam 100 and play a role as a skeleton.

[0102] The upper end of the center support frame 220 is mounted on the rear surface of the main beam 210 , and the lower end thereof is mounted on the bottom plate of the vehicle body, so that the center support frame 220 plays a role in supporting the main beam 210 .

[0103] For this reason, Figure 1 and Figure 2 As shown, the above-mentioned center support frame 220 includes a main frame 221, a neck frame 222, a first assembly plate 223 and a second assembly plate 224. The main frame 221 is arranged along the up and down direction and the lower end portion is assembled to the bottom plate of the lower part of the vehicle body. The neck frame 222 is formed as a whole with the upper part of the main frame 221. The first assembly plate 223 and the second assembly plate 224 are formed on the upper part of the above-mentioned neck frame 222 and are overlapped and assembled on the rear surface of the above-mentioned main beam 210.

[0104] A forming hole 222-1 is formed through one side of the neck frame 222, and the forming hole 222-1 is used to form the cockpit mounting frame 330 in the structure of the plastic injection molding part 300. A protruding hole 222-1 is formed on the other side of the neck frame 222 to facilitate the removal of the injection mold. The bent portion 222-2 has a shaped cross-section.

[0105] At this time, the above-mentioned bending portion 222-2 can not only provide a function of facilitating the removal of the injection mold, but also enhance the rigidity of the neck frame 222 to prevent the neck frame 222 from being deformed due to collision energy.

[0106] The first assembly plate 223 and the second assembly plate 224 are plate structures with curved cross-sections extending upward in two directions from one side and the other side of the neck frame 222, respectively. They overlap the rear surface of the main beam 210 and are installed by welding or the like.

[0107] Thus, the first assembly plate 223 and the second assembly plate 224 are welded to overlap with the rear surface of the main beam 210, so that the rigidity of the main beam 210 can be enhanced by the first assembly plate 223 and the second assembly plate 224, and deformation of the main beam 210 caused by collision energy can be prevented.

[0108] In addition, a pair of through holes 226 are formed in the main beam 210 and the second assembly plate 224 along the front-rear direction. The through holes 226 are not only used as a molding space for the vehicle body mounting frame 320 as a component of the plastic injection molding part 300, but also have the function of facilitating the removal of the injection mold.

[0109] After the steel insert 200 formed with the above-mentioned structure is inserted into the cavity of the injection mold, an injection molding process of injecting plastic material into the cavity of the injection mold can be used to produce a steel insert plastic front panel beam 100 in a form in which the steel insert 200 and the plastic injection molded part 300 are combined.

[0110] like Figure 3 and Figure 4 As shown, the plastic injection molding part 300 injection molded on the above-mentioned steel insert 200 includes a main injection molding part 310, a body mounting frame 320 and a cockpit mounting frame 330. The main injection molding part 310 is formed by overlapping with the main beam 210 of the above-mentioned steel insert 200 and the surfaces of the first assembly plate 223 and the second assembly plate 224. The body mounting frame 320 closes the through hole 226 formed on the above-mentioned main beam 210 and the second assembly plate 224 and is formed by overlapping with the surfaces of the main beam 210 and the second assembly plate 224 and is arranged to protrude forward. The cockpit mounting frame 330 closes the forming hole 222-1 of the above-mentioned neck frame 222 and is arranged to protrude rearward.

[0111] The main injection portion 310 is injection-molded so as to overlap with the surfaces of the main beam 210 , the first mounting plate 223 , the second mounting plate 224 , etc., and functions as a framework of the dash cross member 100 together with the main beam 210 .

[0112] For this reason, Figure 5 and Figure 6 As shown, the main injection molding part 310 includes a horizontal plate-shaped protective body 311, which is formed to overlap with the rear surface of the main beam 210 and the surfaces of the first assembly plate 223 and the second assembly plate 224, and is formed to protrude forward on the front side of the main beam 210 to protect the main beam 210 from being damaged by collision energy.

[0113] Therefore, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molded portion 310 and the protective body 311, the rigidity is enhanced by overlapping the first assembly plate 223 and the second assembly plate 224 on the main beam 210, so the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings from being torn or deformed.

[0114] The front end of the vehicle body mounting frame 320 is mounted at a predetermined position of the vehicle body to support the dash cross member 100 and to preliminarily buffer the collision energy generated by a collision accident.

[0115] For this reason, Figure 7As shown, the vehicle body mounting frame 320 includes a reinforcing plate 321, reinforcing ribs 322 and a vehicle body assembly plate 323. The reinforcing plate 321 closes the through hole 226 formed on the main beam 210 and the second assembly plate 224, and is obliquely arranged at the front end of the main beam 210. The reinforcing ribs 322 extend rearward from the back of the reinforcing plate 321 and are connected between the through holes 226 and the through holes 226 at the front end of the main beam 210. The vehicle body assembly plate 323 extends forward from the lower part of the reinforcing plate 321 and is installed at a predetermined position of the vehicle body.

[0116] At this time, the reinforcing plate 321 and the reinforcing rib 322 of the vehicle body mounting bracket 320 are integrally connected to the main beam 210 of the steel insert 200 by injection molding, so that the rigidity of the vehicle body mounting bracket 320 can be enhanced and the vehicle body mounting bracket 320 can be maintained in a state of being arranged to protrude forward.

[0117] In addition, if Fig.49 As shown, a fracture guide groove 324 can be further formed at the neck of the above-mentioned vehicle body mounting frame 320, so that the vehicle body mounting frame 320 can preliminarily buffer the collision energy generated by the collision accident, and when the collision energy is greater than a predetermined value, the above-mentioned fracture guide groove 324 is fractured, thereby minimizing the collision energy transmitted to the main beam 210 and the main injection molded part 310 of the steel insert 200.

[0118] The cockpit mounting frame 330 can provide a mounting surface for components located behind the dash cross member 100 among the components constituting the cockpit module.

[0119] For this reason, Figure 6 As shown, the cockpit mounting frame 330 is formed in a shape that closes the formed hole 222 - 1 formed on one side of the neck frame 222 and is protruded rearward.

[0120] Therefore, if Figure 6 and Figure 8 As shown, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molded portion 310 and the protective body 311, since the first assembly plate 223 and the second assembly plate 224 are overlapped on the main beam 210 surrounded by the main injection molded portion 310 to enhance the rigidity, the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings which are arranged to close the forming hole 222-1 and protrude rearward and are prevented from being torn or deformed.

[0121] Preferably, if Figure 4As shown, another cockpit mounting frame 330-1 protruding rearward can be integrally injection-molded on the main beam 210 at a position separated from the neck frame 222 of the above-mentioned center support frame 220, and the cockpit mounting frame 330-1 serves to provide a mounting surface for other components constituting the cockpit module.

[0122] Reference Figure 7 Through the through hole 226, a front-to-rear direction mold removal space 325-1 for removing the injection mold is formed above and below the reinforcing rib 322 of the vehicle body mounting frame 320, and a front-to-rear direction mold removal space 325-2 for removing the injection mold along the front-to-rear direction is also formed below the vehicle body assembly plate 323 of the vehicle body mounting frame 320. A top-to-bottom direction mold removal space 326 for removing the injection mold along the top-to-bottom direction is formed above the vehicle body assembly plate 323.

[0123] Reference Figure 8 Through the bending portion 222-2 of the neck frame 222, a mold removal space 325-3 in the front-rear direction is also formed in the plastic injection molding portion surrounding the bending portion 222-2.

[0124] Therefore, the mold can be easily removed after the injection molding process through the front-to-back direction mold removal spaces 325-1, 325-2, 325-3 and the up-down direction mold removal space 326.

[0125] On the other hand, a steering gear lower mounting frame 230 is integrally connected to a predetermined position on the front side of the main beam 210 of the steel insert 200 and is arranged to protrude forward. The steering gear lower mounting frame 230 is used to support the lower part of the steering column and the like.

[0126] Reference Fig.50 The steering gear lower side mounting frame 230 of the steel insert 200 is connected to the main beam 210 as a whole through a steel bar 231 of a predetermined length.

[0127] Therefore, when collision energy is applied to the steering gear lower mounting frame 230, the steel bar 231 buffers the collision energy while deforming, so that the steering column and the like mounted on the steering gear lower mounting frame 230 will not deviate significantly from their original position, and can also minimize entry into the room.

[0128] The plastic material is also injection molded onto the steering gear lower side mounting frame 230 of the steel insert 200 , and therefore, the plastic injection molding part 300 further includes a plastic injection molding bracket 340 formed on the steel bar 231 and the steering gear lower side mounting frame 230 .

[0129] Preferably, if Fig.50As shown, a plurality of deformation guide holes 232 for absorbing collision energy and guiding deformation are formed on the upper plate portion of the steering gear lower side mounting frame 230 .

[0130] Reference Fig.51 and Fig.52 The above-mentioned plastic injection molded bracket 340 may include a first injection molded bracket portion 341 and a second injection molded bracket portion 342. The first injection molded bracket portion 341 is formed in a manner of surrounding the above-mentioned steel bar 231, and the second injection molded bracket portion 342 is formed in an overlapping manner with the upper surface, two side surfaces and bottom surface portion of the above-mentioned steering gear lower side mounting frame 230.

[0131] In addition, if Fig.51 As shown, a step portion 343 for guiding bending and breaking is formed at the upper surface boundary portion of the first injection molded bracket portion 341 and the second injection molded bracket portion 342 .

[0132] At this time, a floating nut 234 for coupling with a vehicle body bolt is pre-welded to the steering gear lower mounting frame 230 because it is difficult to form the floating nut by plastic insert injection molding.

[0133] Therefore, if the collision energy generated by the front collision is applied to the above-mentioned steering gear lower side mounting frame 230, the above-mentioned deformation guide hole 232 can absorb the initial collision energy while deforming, and through the step portion 343 formed at the boundary portion of the above-mentioned first injection molded bracket portion 341 and the second injection molded bracket portion 342, the bending and breaking deformation of the steering gear lower side mounting frame 230 can be guided. On this basis, the above-mentioned steel bar 231 deforms and further buffers the collision energy. As a result, the steering column and the like assembled on the steering gear lower side mounting frame 230 basically will not deviate significantly from its original position, and the entry into the indoor direction can be minimized, thereby minimizing the deformation of the front panel cross beam and preventing indoor passengers from being injured.

[0134] Second embodiment

[0135] Fig. 9 and Fig.10 is a perspective view showing a steel insert of a dash cross member according to a second embodiment of the present invention, Fig.11 and Fig.12 1 is a perspective view showing a steel-inserted plastic dash cross member according to a second embodiment of the present invention.

[0136] like Fig.10 As shown, the steel-insert plastic front panel cross beam according to the second embodiment of the present invention also includes a connecting plate 225 in the structure of the center support frame 220, which connects the first assembly plate 223 and the second assembly plate 224 into one body and is overlapped and assembled on the main beam 210 of the steel insert 200.

[0137] The steel-insert plastic dash beam 100 according to the second embodiment of the present invention is manufactured in the following manner: with the steel insert inserted into the cavity of the injection mold, plastic material is injected into the cavity of the injection mold at a predetermined pressure, thereby manufacturing a combination of the steel insert 200 and the plastic injection molded part 300.

[0138] like Fig. 9 As shown, the steel insert 200 includes: a main beam 210 made of a "C"-shaped cross-sectional structure open toward the front; a center support frame 220 connected to a predetermined position on the rear surface of the main beam 210 and extending downward; and a steering gear lower side mounting frame 230 connected to a predetermined position on the front part of the main beam 210 and protruding toward the front.

[0139] The main beam 210 is disposed in the left and right lateral directions in front of the driver's seat and the passenger seat, and both side ends are assembled and fixed to the left and right side panels of the vehicle body to maintain the rigidity of the dash cross beam 100 and play a role as a skeleton.

[0140] The upper end of the center support frame 220 is mounted on the rear surface of the main beam 210 , and the lower end thereof is mounted on the bottom plate of the vehicle body, so that the center support frame 220 plays a role in supporting the main beam 210 .

[0141] For this reason, Fig. 9 and Fig.10 As shown, the above-mentioned center support frame 220 includes a main frame 221, a neck frame 222, a first assembly plate 223, a second assembly plate 224 and a connecting plate 225. The main frame 221 is arranged along the up and down direction and the lower end portion is assembled to the panel at the lower part of the vehicle body. The neck frame 222 is formed as a whole with the upper part of the main frame 221. The first assembly plate 223 and the second assembly plate 224 are formed on the upper part of the above-mentioned neck frame 222 and are overlapped and assembled on the rear surface of the above-mentioned main beam 210. The connecting plate 225 connects the above-mentioned first assembly plate 223 and the second assembly plate 224 as a whole and overlaps and is assembled on the rear surface of the above-mentioned main beam 210.

[0142] A forming hole 222-1 is formed through one side of the neck frame 222, and the forming hole 222-1 is used to form the cockpit mounting frame 330 in the structure of the plastic injection molding part 300. A protruding hole 222-1 is formed on the other side of the neck frame 222 to facilitate the removal of the injection mold. The bent portion 222-2 has a shaped cross-section.

[0143] At this time, the above-mentioned bending portion 222-2 can not only provide a function of facilitating the removal of the injection mold, but also enhance the rigidity of the neck frame 222 to prevent the neck frame 222 from being deformed due to collision energy.

[0144] The first assembly plate 223 and the second assembly plate 224 are plate structures with curved cross sections extending upward in two directions from one side and the other side of the neck frame 222, respectively, and overlap the rear surface of the main beam 210 and are installed by welding or the like. In addition, the connecting plate 225 connecting the first assembly plate 223 and the second assembly plate 224 as a whole is also overlapped on the rear surface of the main beam 210 and is installed by welding or the like.

[0145] Thus, the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 are welded to the rear surface of the main beam 210 in an overlapping manner, so that the rigidity of the main beam 210 can be enhanced by the first assembly plate 223, the second assembly plate 224 and the connecting plate 225, and deformation of the main beam 210 caused by collision energy can be prevented.

[0146] In addition, a pair of through holes 226 are formed in the main beam 210 and the second assembly plate 224 along the front-rear direction. The through holes 226 are not only used as a molding space for the vehicle body mounting frame 320 as a component of the plastic injection molding part 300, but also have the function of facilitating the removal of the injection mold.

[0147] After the steel insert 200 formed with the above-mentioned structure is inserted into the cavity of the injection mold, an injection molding process of injecting plastic material into the cavity of the injection mold can be used to produce a steel insert plastic front panel beam 100 in a form in which the steel insert 200 and the plastic injection molded part 300 are combined.

[0148] like Fig.11 and Fig.12 As shown, the plastic injection molding part 300 injection molded on the above-mentioned steel insert 200 includes a main injection molding part 310, a body mounting frame 320 and a cockpit mounting frame 330. The main injection molding part 310 is formed by overlapping with the surfaces of the main beam 210, the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 of the above-mentioned steel insert 200. The body mounting frame 320 closes the through hole 226 formed on the above-mentioned main beam 210 and the second assembly plate 224 and is formed by overlapping with the surfaces of the main beam 210 and the second assembly plate 224 and is arranged to protrude forward. The cockpit mounting frame 330 closes the forming hole 222-1 of the above-mentioned neck frame 222 and is arranged to protrude rearward.

[0149] The main injection molded portion 310 is injection molded so as to overlap the surfaces of the main beam 210 , the first and second mounting plates 223 , 224 , and the connecting plate 225 , and functions as a framework of the dash cross member 100 together with the main beam 210 .

[0150] For this reason, Fig.13 and Fig.14As shown, the main injection molding part 310 includes a horizontal plate-shaped protective body 311, which is formed to overlap with the rear surface of the main beam 210, the first assembly plate 223, the second assembly plate 224 and the surface of the connecting plate 225, and is formed to protrude forward on the front side of the main beam 210 to protect the main beam 210 from being damaged by collision energy.

[0151] Therefore, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molding portion 310 and the protective body 311, the rigidity is enhanced by overlapping the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 on the main beam 210, so the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings from being torn or deformed.

[0152] The front end of the vehicle body mounting frame 320 is mounted at a predetermined position of the vehicle body to support the dash cross member 100 and to preliminarily buffer the collision energy generated by a collision accident.

[0153] For this reason, Fig.15 As shown, the vehicle body mounting frame 320 includes a reinforcing plate 321, reinforcing ribs 322 and a vehicle body assembly plate 323. The reinforcing plate 321 closes the through hole 226 formed on the main beam 210 and the second assembly plate 224, and is obliquely arranged at the front end of the main beam 210. The reinforcing ribs 322 extend rearward from the back of the reinforcing plate 321 and are connected between the through holes 226 and the through holes 226 at the front end of the main beam 210. The vehicle body assembly plate 323 extends forward from the lower part of the reinforcing plate 321 and is assembled to a predetermined position of the vehicle body.

[0154] At this time, the reinforcing plate 321 and the reinforcing rib 322 of the vehicle body mounting bracket 320 are integrally connected to the main beam 210 of the steel insert 200 by injection molding, so that the rigidity of the vehicle body mounting bracket 320 can be enhanced and the vehicle body mounting bracket 320 can be maintained in a state of being arranged to protrude forward.

[0155] In addition, if Fig.49 As shown, a fracture guide groove 324 can be further formed at the neck of the above-mentioned vehicle body mounting frame 320, so that the vehicle body mounting frame 320 can preliminarily buffer the collision energy generated by the collision accident, and when the collision energy is greater than a predetermined value, the above-mentioned fracture guide groove 324 is fractured, thereby minimizing the collision energy transmitted to the main beam 210 and the main injection molded part 310 of the steel insert 200.

[0156] The cockpit mounting frame 330 can provide a mounting surface for the components located on the rear side of the dash cross member 100 among the components constituting the cockpit module.

[0157] For this reason, Fig.14 As shown, the cockpit mounting frame 330 is formed in a shape that closes the formed hole 222 - 1 formed on one side of the neck frame 222 and is protruded rearward.

[0158] Therefore, if Fig.12 , Fig.14 and Fig.16 As shown, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molding portion 310 and the protective body 311, since the main beam 210 surrounded by the main injection molding portion 310 is overlapped with the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 to enhance the rigidity, the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings which are closed with the forming hole 222-1 and protruding rearward and are arranged to be torn or deformed.

[0159] Preferably, if Fig.12 As shown, another cockpit mounting frame 330-1 protruding rearward can be integrally injection-molded on the main beam 210 at a position separated from the neck frame 222 of the above-mentioned center support frame 220, and the cockpit mounting frame 330-1 serves to provide a mounting surface for other components constituting the cockpit module.

[0160] Reference Fig.15 Through the through hole 226, a front-to-rear direction mold removal space 325-1 for removing the injection mold is formed above and below the reinforcing rib 322 of the vehicle body mounting frame 320, and a front-to-rear direction mold removal space 325-2 for removing the injection mold along the front-to-rear direction is also formed below the vehicle body assembly plate 323 of the vehicle body mounting frame 320. An up-down direction mold removal space 326 for removing the injection mold along the up-down direction is formed above the vehicle body assembly plate 323.

[0161] Reference Fig.16 Through the bending portion 222-2 of the neck frame 222, a mold removal space 325-3 in the front-rear direction is also formed in the plastic injection molding portion surrounding the bending portion 222-2.

[0162] Therefore, the mold can be easily removed after the injection molding process through the front-to-back direction mold removal spaces 325-1, 325-2, 325-3 and the up-down direction mold removal space 326.

[0163] On the other hand, a steering gear lower mounting frame 230 is integrally connected to a predetermined position on the front side of the main beam 210 of the steel insert 200 and is arranged to protrude forward. The steering gear lower mounting frame 230 is used to support the lower part of the steering column and the like.

[0164] Reference Fig.50 The steering gear lower side mounting frame 230 of the steel insert 200 is connected to the main beam 210 as a whole through a steel bar 231 of a predetermined length.

[0165] Therefore, when collision energy is applied to the steering gear lower mounting frame 230, the steel bar 231 buffers the collision energy while deforming, so that the steering column and the like mounted on the steering gear lower mounting frame 230 will not deviate significantly from their original position, and can also minimize entry into the room.

[0166] The plastic material is also injection molded onto the steering gear lower side mounting frame 230 of the steel insert 200 , and therefore, the plastic injection molding part 300 further includes a plastic injection molding bracket 340 formed on the steel bar 231 and the steering gear lower side mounting frame 230 .

[0167] Preferably, if Fig.50 As shown, a plurality of deformation guide holes 232 for absorbing collision energy and guiding deformation are formed on the upper plate portion of the steering gear lower side mounting frame 230 .

[0168] Reference Fig.51 and Fig.52 The above-mentioned plastic injection molded bracket 340 may include a first injection molded bracket portion 341 and a second injection molded bracket portion 342. The first injection molded bracket portion 341 is formed in a manner of surrounding the above-mentioned steel bar 231, and the second injection molded bracket portion 342 is formed in an overlapping manner with the upper surface, two side surfaces and bottom surface portion of the above-mentioned steering gear lower side mounting frame 230.

[0169] In addition, if Fig.51 As shown, a step portion 343 for guiding bending and breaking is formed at the upper surface boundary portion of the first injection molded bracket portion 341 and the second injection molded bracket portion 342 .

[0170] At this time, a floating nut 234 for bolting with the vehicle body is pre-welded to the steering gear lower mounting frame 230 because it is difficult to insert-mold the floating nut with plastic.

[0171] Therefore, if the collision energy generated by the front collision is applied to the above-mentioned steering gear lower side mounting frame 230, the above-mentioned deformation guide hole 232 can absorb the initial collision energy while deforming, and through the step portion 343 formed at the boundary portion of the above-mentioned first injection molded bracket portion 341 and the second injection molded bracket portion 342, the bending and breaking deformation of the steering gear lower side mounting frame 230 can be guided. On this basis, the above-mentioned steel bar 231 deforms and further buffers the collision energy. As a result, the steering column and the like assembled on the steering gear lower side mounting frame 230 basically will not deviate significantly from its original position, and the entry into the indoor direction can be minimized, thereby minimizing the deformation of the front panel cross beam and preventing indoor passengers from being injured.

[0172] Third embodiment

[0173] Fig.17 and Fig.18 is a perspective view showing a steel insert of a dash cross member according to a third embodiment of the present invention, Fig.19 and Fig. 20 1 is a perspective view showing a steel-inserted plastic dash cross member according to a third embodiment of the present invention.

[0174] The steel-insert plastic dash panel cross beam 100 according to the third embodiment of the present invention is manufactured in the following manner: when the steel insert is inserted into the cavity of the injection mold, plastic material is injected into the cavity of the injection mold at a predetermined pressure, thereby manufacturing a combination of the steel insert 200 and the plastic injection molded part 300.

[0175] like Fig.23A As shown, the steel-inserted plastic dash beam according to the third embodiment of the present invention is made into the following structure: in the structure of the plastic injection molding part 300, the plastic weight-reducing mold core can be easily removed from the part where the filling part 327 is formed on the vehicle body mounting frame 320 by rotation.

[0176] That is, in the plurality of molds used for injection molding the above-mentioned steel-insert plastic dash panel cross beam, when the plastic weight-reducing mold core is not a linear motion type but a rotational motion type, the steel-insert plastic dash panel cross beam is manufactured into the following structure: in the structure of the plastic injection molding portion 300, the plastic weight-reducing mold core can be easily removed from the portion where the vehicle body mounting frame 320 is formed by rotation.

[0177] like Fig.17 As shown, the steel insert 200 includes: a main beam 210 made of a "C"-shaped cross-sectional structure open toward the front; a center support frame 220 connected to a predetermined position on the rear surface of the main beam 210 and extending downward; and a steering gear lower side mounting frame 230 connected to a predetermined position on the front part of the main beam 210 and protruding toward the front.

[0178] The main beam 210 is disposed in the left and right lateral directions in front of the driver's seat and the passenger seat, and both side ends are assembled and fixed to the left and right side panels of the vehicle body to maintain the rigidity of the dash cross beam 100 and play a role as a skeleton.

[0179] The upper end of the center support frame 220 is mounted on the rear surface of the main beam 210 , and the lower end thereof is mounted on the bottom plate of the vehicle body, so that the center support frame 220 plays a role in supporting the main beam 210 .

[0180] For this reason, Fig.17 and Fig.18 As shown, the above-mentioned center support frame 220 includes a main frame 221, a neck frame 222, a first assembly plate 223 and a second assembly plate 224. The main frame 221 is arranged along the up and down direction and the lower end portion is assembled to the bottom plate of the lower part of the vehicle body. The neck frame 222 is formed as a whole with the upper part of the main frame 221. The first assembly plate 223 and the second assembly plate 224 are formed on the upper part of the above-mentioned neck frame 222 and are overlapped and assembled on the rear surface of the above-mentioned main beam 210.

[0181] A forming hole 222-1 is formed through one side of the neck frame 222, and the forming hole 222-1 is used to form the cockpit mounting frame 330 in the structure of the plastic injection molding part 300. A protruding hole 222-1 is formed on the other side of the neck frame 222 to facilitate the removal of the injection mold. The bent portion 222-2 has a shaped cross-section.

[0182] At this time, the above-mentioned bending portion 222-2 can not only provide a function of facilitating the removal of the injection mold, but also enhance the rigidity of the neck frame 222 to prevent the neck frame 222 from being deformed due to collision energy.

[0183] The first assembly plate 223 and the second assembly plate 224 are plate structures with curved cross-sections extending upward in two directions from one side and the other side of the neck frame 222, respectively. They overlap the rear surface of the main beam 210 and are installed by welding or the like.

[0184] Thus, the first assembly plate 223 and the second assembly plate 224 are welded to overlap with the rear surface of the main beam 210, so that the rigidity of the main beam 210 can be enhanced by the first assembly plate 223 and the second assembly plate 224, and deformation of the main beam 210 caused by collision energy can be prevented.

[0185] After the steel insert 200 formed with the above-mentioned structure is inserted into the cavity of the injection mold, an injection molding process of injecting plastic material into the cavity of the injection mold can be used to produce a steel insert plastic front panel beam 100 in a form in which the steel insert 200 and the plastic injection molded part 300 are combined.

[0186] like Fig.19 and Fig. 20 As shown, the plastic injection molding part 300 injection-molded on the above-mentioned steel insert 200 includes a main injection molding part 310, a vehicle body mounting frame 320 and a cockpit mounting frame 330. The main injection molding part 310 is formed overlapping with the surfaces of the main beam 210 of the above-mentioned steel insert 200 and the first assembly plate 223 and the second assembly plate 224. The vehicle body mounting frame 320 is arranged to protrude forward from the front part of the main beam 210, and the cockpit mounting frame 330 is formed to close the forming hole 222-1 of the above-mentioned neck frame 222 and protrude rearward.

[0187] The main injection portion 310 is injection-molded so as to overlap with the surfaces of the main beam 210 , the first mounting plate 223 , the second mounting plate 224 , etc., and functions as a framework of the dash cross member 100 together with the main beam 210 .

[0188] For this reason, Fig.21 and Fig. 22 As shown, the main injection molding part 310 includes a horizontal plate-shaped protective body 311, which is formed to overlap with the rear surface of the main beam 210 and the surfaces of the first assembly plate 223 and the second assembly plate 224, and is formed to protrude forward on the front side of the main beam 210 to protect the main beam 210 from being damaged by collision energy.

[0189] Therefore, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molded portion 310 and the protective body 311, the rigidity is enhanced by overlapping the first assembly plate 223 and the second assembly plate 224 on the main beam 210, so the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings from being torn or deformed.

[0190] The front end of the vehicle body mounting frame 320 is mounted at a predetermined position of the vehicle body to support the dash cross member 100 and to preliminarily buffer the collision energy generated by a collision accident.

[0191] For this reason, Fig.23A As shown, the vehicle body mounting frame 320 includes a reinforcing filling portion 327 and a vehicle body assembly plate 323. The reinforcing filling portion 327 is formed by filling the front portion (the recessed portion of the "C"-shaped cross-section) of the main beam 210, and the vehicle body assembly plate 323 extends forward from the lower portion of the filling portion 327 and is installed at a predetermined position on the vehicle body.

[0192] At this time, the filling portion 327 of the vehicle body mounting frame 320 is formed to play a reinforcing function of preventing the main beam 210 from bending, to guide the removal of the mold core, and to prevent undercutting.

[0193] In addition, the filling portion 327 of the vehicle body mounting bracket 320 is integrally connected to the main beam 210 of the steel insert 200 by injection molding, thereby enhancing the rigidity of the vehicle body mounting bracket 320 and allowing the vehicle body mounting bracket 320 to be maintained in a state of being protruded forward.

[0194] In particular, Fig.23A As shown, the surface of the filling portion 327 is formed as a curved weight-reducing groove 327 - 1 , so that the cores 328 in the plurality of injection molds can be easily taken out by rotation.

[0195] That is, the surface of the filling portion 327 can be formed into a curved weight-reducing groove portion 327 - 1 by the plastic weight-reducing operation of the mold core 328 , so that the mold core 328 can be easily removed by rotation.

[0196] On the other hand, the filling portion 327 can be removed by rotating the core 328 to form a curved weight-reducing groove 327-1 structure, or as described above. Fig. 23B As shown, the protective body 311 can also be formed into a horizontal plate-like shape having a weight-reducing groove by being taken out by horizontal movement of the core 328 .

[0197] In addition, if Fig.49 As shown, a fracture guide groove 324 can be further formed at the neck of the above-mentioned vehicle body mounting frame 320, so that the vehicle body mounting frame 320 can preliminarily buffer the collision energy generated by the collision accident, and when the collision energy is greater than a predetermined value, the above-mentioned fracture guide groove 324 is fractured, thereby minimizing the collision energy transmitted to the main beam 210 and the main injection molded part 310 of the steel insert 200.

[0198] The cockpit mounting frame 330 can provide a mounting surface for the components located on the rear side of the dash cross member 100 among the components constituting the cockpit module.

[0199] For this reason, Fig. 22 As shown, the cockpit mounting frame 330 is formed in a shape that closes the formed hole 222 - 1 formed on one side of the neck frame 222 and is protruded rearward.

[0200] Therefore, if Fig. 22 and Fig.24 As shown, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molded portion 310 and the protective body 311, since the first assembly plate 223 and the second assembly plate 224 are overlapped on the main beam 210 surrounded by the main injection molded portion 310 to enhance the rigidity, the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings which are arranged to close the forming hole 222-1 and protrude rearward and are prevented from being torn or deformed.

[0201] Preferably, if Fig. 20 As shown, another cockpit mounting frame 330-1 protruding rearward can be integrally injection-molded on the main beam 210 at a position separated from the neck frame 222 of the above-mentioned center support frame 220, and the cockpit mounting frame 330-1 serves to provide a mounting surface for other components constituting the cockpit module.

[0202] Reference Fig.23A and Fig. 23B A front-to-rear direction mold removal space 325-2 for removing the injection mold along the front-to-rear direction is formed below the body assembly plate 323 of the above-mentioned body mounting frame 320, and a top-to-bottom direction mold removal space 326 for removing the injection mold along the top-to-bottom direction is formed above the above-mentioned body assembly plate 323.

[0203] Reference Fig.24 Through the bending portion 222-2 of the neck frame 222, a mold removal space 325-3 in the front-rear direction is also formed in the plastic injection molding portion surrounding the bending portion 222-2.

[0204] Therefore, through the above-mentioned front-to-back direction mold removal spaces 325-2, 325-3 and the up-down direction mold removal space 326, the mold can be conveniently removed after the injection molding process, and then the surface of the above-mentioned filling part 327 can be formed into a curved weight-reducing groove part 327-1 through the plastic weight-reducing operation of the mold core 328.

[0205] On the other hand, a steering gear lower mounting frame 230 is integrally connected to a predetermined position on the front side of the main beam 210 of the steel insert 200 and is arranged to protrude forward. The steering gear lower mounting frame 230 is used to support the lower part of the steering column and the like.

[0206] Reference Fig.50 The steering gear lower side mounting frame 230 of the steel insert 200 is connected to the main beam 210 as a whole through a steel bar 231 of a predetermined length.

[0207] Therefore, when collision energy is applied to the steering gear lower mounting frame 230, the steel bar 231 buffers the collision energy while deforming, so that the steering column and the like mounted on the steering gear lower mounting frame 230 will not deviate significantly from their original position, and can also minimize entry into the room.

[0208] The plastic material is also injection molded onto the steering gear lower side mounting frame 230 of the steel insert 200 , and therefore, the plastic injection molding part 300 further includes a plastic injection molding bracket 340 formed on the steel bar 231 and the steering gear lower side mounting frame 230 .

[0209] Preferably, if Fig.50As shown, a plurality of deformation guide holes 232 for absorbing collision energy and guiding deformation are formed on the upper plate portion of the steering gear lower side mounting frame 230 .

[0210] Reference Fig.51 and Fig.52 The above-mentioned plastic injection molded bracket 340 may include a first injection molded bracket portion 341 and a second injection molded bracket portion 342. The first injection molded bracket portion 341 is formed in a manner of surrounding the above-mentioned steel bar 231, and the second injection molded bracket portion 342 is formed in an overlapping manner with the upper surface, two side surfaces and bottom surface portion of the above-mentioned steering gear lower side mounting frame 230.

[0211] In addition, if Fig.51 As shown, a step portion 343 for guiding bending and breaking is formed at the upper surface boundary portion of the first injection molded bracket portion 341 and the second injection molded bracket portion 342 .

[0212] At this time, a floating nut 234 for bolting with the vehicle body is welded in advance to the steering gear lower mounting frame 230 because it is difficult to insert-mold the floating nut with plastic.

[0213] Therefore, if the collision energy generated by the front collision is applied to the above-mentioned steering gear lower side mounting frame 230, the above-mentioned deformation guide hole 232 can absorb the initial collision energy while deforming, and through the step portion 343 formed at the boundary portion of the above-mentioned first injection molded bracket portion 341 and the second injection molded bracket portion 342, the bending and breaking deformation of the steering gear lower side mounting frame 230 can be guided. On this basis, the above-mentioned steel bar 231 deforms and further buffers the collision energy. As a result, the steering column and the like assembled on the steering gear lower side mounting frame 230 basically will not deviate significantly from its original position, and the entry into the indoor direction can be minimized, thereby minimizing the deformation of the front panel cross beam and preventing indoor passengers from being injured.

[0214] Fourth embodiment

[0215] Fig.25 and Fig.26 is a perspective view showing a steel insert of a dash cross member according to a fourth embodiment of the present invention, Fig. 27 and Fig.28 1 is a perspective view showing a steel-inserted plastic dash cross member according to a fourth embodiment of the present invention.

[0216] The steel-inserted plastic dash cross beam according to the fourth embodiment of the present invention is made into a structure that allows the plastic weight-reducing mold core to be easily removed by rotation, as described in the third embodiment above. Fig.26As shown, the structure of the central support frame 220 further includes a connecting plate 225 , which connects the first assembly plate 223 and the second assembly plate 224 into one body and is assembled to the main beam 210 of the steel insert 200 in an overlapping manner.

[0217] The steel-insert plastic dash panel cross beam 100 according to the fourth embodiment of the present invention is manufactured in the following manner: when the steel insert is inserted into the cavity of the injection mold, plastic material is injected into the cavity of the injection mold at a predetermined pressure, thereby manufacturing a combination of the steel insert 200 and the plastic injection molded part 300.

[0218] like Fig.25 As shown, the steel insert 200 includes: a main beam 210 made of a "C"-shaped cross-sectional structure open toward the front; a center support frame 220 connected to a predetermined position on the rear surface of the main beam 210 and extending downward; and a steering gear lower side mounting frame 230 connected to a predetermined position on the front part of the main beam 210 and protruding toward the front.

[0219] The main beam 210 is disposed in the left and right lateral directions in front of the driver's seat and the passenger seat, and both side ends are assembled and fixed to the left and right side panels of the vehicle body to maintain the rigidity of the dash cross beam 100 and play a role as a skeleton.

[0220] The upper end of the center support frame 220 is mounted on the rear surface of the main beam 210 , and the lower end thereof is mounted on the bottom plate of the vehicle body, so that the center support frame 220 plays a role in supporting the main beam 210 .

[0221] For this reason, Fig.25 and Fig.26 As shown, the above-mentioned center support frame 220 includes a main frame 221, a neck frame 222, a first assembly plate 223, a second assembly plate 224 and a connecting plate 225. The main frame 221 is arranged along the up and down direction and the lower end portion is assembled to the bottom plate of the lower part of the vehicle body. The neck frame 222 is formed as a whole with the upper part of the main frame 221. The first assembly plate 223 and the second assembly plate 224 are formed on the upper part of the above-mentioned neck frame 222 and are overlapped and assembled on the rear surface of the above-mentioned main beam 210. The connecting plate 225 connects the above-mentioned first assembly plate 223 and the second assembly plate 224 as a whole and overlaps and is assembled on the rear surface of the above-mentioned main beam 210.

[0222] A forming hole 222-1 is formed through one side of the neck frame 222, and the forming hole 222-1 is used to form the cockpit mounting frame 330 in the structure of the plastic injection molding part 300. A protruding hole 222-1 is formed on the other side of the neck frame 222 to facilitate the removal of the injection mold. The bent portion 222-2 has a shaped cross-section.

[0223] At this time, the above-mentioned bending portion 222-2 can not only provide a function of facilitating the removal of the injection mold, but also enhance the rigidity of the neck frame 222 to prevent the neck frame 222 from being deformed due to collision energy.

[0224] The first assembly plate 223 and the second assembly plate 224 are plate structures with curved cross-sections that extend upward in two directions from one side and the other side of the neck frame 222, respectively, and overlap on the rear surface of the main beam 210 and are installed by welding or the like. In addition, the connecting plate 225 that connects the first assembly plate 223 and the second assembly plate 224 into one body also overlaps on the rear surface of the main beam 210 and is installed by welding or the like.

[0225] Thus, the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 are welded to the rear surface of the main beam 210 in an overlapping manner, so that the rigidity of the main beam 210 can be enhanced by the first assembly plate 223, the second assembly plate 224 and the connecting plate 225, and deformation of the main beam 210 caused by collision energy can be prevented.

[0226] After the steel insert 200 formed with the above-mentioned structure is inserted into the cavity of the injection mold, an injection molding process of injecting plastic material into the cavity of the injection mold can be used to produce a steel insert plastic front panel beam 100 in a form in which the steel insert 200 and the plastic injection molded part 300 are combined.

[0227] like Fig. 27 and Fig.28 As shown, the plastic injection molding part 300 injection molded on the above-mentioned steel insert 200 includes a main injection molding part 310, a vehicle body mounting frame 320 and a cockpit mounting frame 330. The main injection molding part 310 is formed overlapping with the surfaces of the main beam 210, the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 of the above-mentioned steel insert 200. The vehicle body mounting frame 320 is arranged to protrude forward from the front part of the above-mentioned main beam 210, and the cockpit mounting frame 330 is formed to close the forming hole 222-1 of the above-mentioned neck frame 222 and protrude rearward.

[0228] The main injection molded portion 310 is injection molded so as to overlap the surfaces of the main beam 210 , the first and second mounting plates 223 , 224 , and the connecting plate 225 , and functions as a framework of the dash cross member 100 together with the main beam 210 .

[0229] For this reason, Fig.29 and Fig.30As shown, the main injection molding part 310 includes a horizontal plate-shaped protective body 311, which is formed to overlap with the rear surface of the main beam 210, the first assembly plate 223, the second assembly plate 224 and the surface of the connecting plate 225, and is formed to protrude forward on the front side of the main beam 210 to protect the main beam 210 from being damaged by collision energy.

[0230] Therefore, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molding portion 310 and the protective body 311, the rigidity is enhanced by overlapping the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 on the main beam 210, so the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings from being torn or deformed.

[0231] The front end of the vehicle body mounting frame 320 is mounted at a predetermined position of the vehicle body to support the dash cross member 100 and to provide a preliminary buffer for the collision energy generated by a collision accident.

[0232] For this reason, Fig.31A As shown, the vehicle body mounting frame 320 includes a reinforcing filling portion 327 and a vehicle body assembly plate 323. The reinforcing filling portion 327 is formed by filling the front portion (the recessed portion of the "C"-shaped cross-section) of the main beam 210, and the vehicle body assembly plate 323 extends forward from the lower portion of the filling portion 327 and is installed at a predetermined position on the vehicle body.

[0233] At this time, the filling portion 327 of the vehicle body mounting frame 320 is formed to play a reinforcing function of preventing the main beam 210 from bending, to guide the removal of the mold core, and to prevent undercutting.

[0234] In addition, the filling portion 327 of the vehicle body mounting bracket 320 is integrally connected to the main beam 210 of the steel insert 200 by injection molding, thereby enhancing the rigidity of the vehicle body mounting bracket 320 and allowing the vehicle body mounting bracket 320 to be maintained in a state of being protruded forward.

[0235] In particular, Fig.31A As shown, the surface of the filling portion 327 is formed as a curved weight-reducing groove 327 - 1 , so that the cores 328 in the plurality of injection molds can be easily taken out by rotation.

[0236] That is, the surface of the filling portion 327 can be formed into a curved weight-reducing groove portion 327 - 1 by the plastic weight-reducing operation of the mold core 328 , so that the mold core 328 can be easily removed by rotation.

[0237] On the other hand, the filling portion 327 can be removed by rotating the core 328 to form a curved weight-reducing groove 327-1 structure as described above, but Fig.31B As shown, the protective body 311 can also be formed into a horizontal plate-like shape having a weight-reducing groove by being taken out by horizontal movement of the core 328 .

[0238] In addition, if Fig.49 As shown, a fracture guide groove 324 can be further formed at the neck of the above-mentioned vehicle body mounting frame 320, so that the vehicle body mounting frame 320 can preliminarily buffer the collision energy generated by the collision accident, and when the collision energy is greater than a predetermined value, the above-mentioned fracture guide groove 324 is fractured, thereby minimizing the collision energy transmitted to the main beam 210 and the main injection molded part 310 of the steel insert 200.

[0239] The cockpit mounting frame 330 can provide a mounting surface for the components located on the rear side of the dash cross member 100 among the components constituting the cockpit module.

[0240] For this reason, Fig.30 As shown, the cockpit mounting frame 330 is formed in a shape that closes the formed hole 222 - 1 formed on one side of the neck frame 222 and is protruded rearward.

[0241] Therefore, if Fig.29 , Fig.30 and Fig.32 As shown, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molding portion 310 and the protective body 311, since the main beam 210 surrounded by the main injection molding portion 310 is overlapped with the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 to enhance the rigidity, the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings which are closed with the forming hole 222-1 and protruding rearward and are arranged to be torn or deformed.

[0242] Preferably, if Fig.28 As shown, another cockpit mounting frame 330-1 protruding rearward can be integrally injection-molded on the main beam 210 at a position separated from the neck frame 222 of the above-mentioned center support frame 220, and the cockpit mounting frame 330-1 serves to provide a mounting surface for other components constituting the cockpit module.

[0243] Reference Fig.31A and Fig.31BA front-to-rear direction mold removal space 325-2 for removing the injection mold along the front-to-rear direction is formed below the body assembly plate 323 of the above-mentioned body mounting frame 320, and a top-to-bottom direction mold removal space 326 for removing the injection mold along the top-to-bottom direction is formed above the above-mentioned body assembly plate 323.

[0244] Reference Fig.32 Through the bending portion 222-2 of the neck frame 222, a mold removal space 325-3 in the front-rear direction is also formed in the plastic injection molding portion surrounding the bending portion 222-2.

[0245] Therefore, through the above-mentioned front-to-back direction mold removal spaces 325-2, 325-3 and the up-down direction mold removal space 326, the mold can be conveniently removed after the injection molding process, and then the surface of the above-mentioned filling part 327 can be formed into a curved weight-reducing groove part 327-1 through the plastic weight-reducing operation of the mold core 328.

[0246] On the other hand, a steering gear lower mounting frame 230 is integrally connected to a predetermined position on the front side of the main beam 210 of the steel insert 200 and is arranged to protrude forward. The steering gear lower mounting frame 230 is used to support the lower part of the steering column and the like.

[0247] Reference Fig.50 The steering gear lower side mounting frame 230 of the steel insert 200 is connected to the main beam 210 as a whole through a steel bar 231 of a predetermined length.

[0248] Therefore, when collision energy is applied to the steering gear lower mounting frame 230, the steel bar 231 buffers the collision energy while deforming, so that the steering column and the like mounted on the steering gear lower mounting frame 230 will not deviate significantly from their original position, and can also minimize entry into the room.

[0249] The plastic material is also injection molded onto the steering gear lower side mounting frame 230 of the steel insert 200 , and therefore, the plastic injection molding part 300 further includes a plastic injection molding bracket 340 formed on the steel bar 231 and the steering gear lower side mounting frame 230 .

[0250] Preferably, if Fig.50 As shown, a plurality of deformation guide holes 232 for absorbing collision energy and guiding deformation are formed on the upper plate portion of the steering gear lower side mounting frame 230 .

[0251] Reference Fig.51 and Fig.52The above-mentioned plastic injection molded bracket 340 may include a first injection molded bracket portion 341 and a second injection molded bracket portion 342. The first injection molded bracket portion 341 is formed in a manner of surrounding the above-mentioned steel bar 231, and the second injection molded bracket portion 342 is formed in an overlapping manner with the upper surface, two side surfaces and bottom surface portion of the above-mentioned steering gear lower side mounting frame 230.

[0252] In addition, if Fig.51 As shown, a step portion 343 for guiding bending and breaking is formed at the upper surface boundary portion of the first injection molded bracket portion 341 and the second injection molded bracket portion 342 .

[0253] At this time, a floating nut 234 for bolting with the vehicle body is welded in advance to the steering gear lower mounting frame 230 because it is difficult to insert-mold the floating nut with plastic.

[0254] Therefore, if the collision energy generated by the front collision is applied to the above-mentioned steering gear lower side mounting frame 230, the above-mentioned deformation guide hole 232 can absorb the initial collision energy while deforming, and through the step portion 343 formed at the boundary portion of the above-mentioned first injection molded bracket portion 341 and the second injection molded bracket portion 342, the bending and breaking deformation of the steering gear lower side mounting frame 230 can be guided. On this basis, the above-mentioned steel bar 231 deforms and further buffers the collision energy. As a result, the steering column and the like assembled on the steering gear lower side mounting frame 230 basically will not deviate significantly from its original position, and the entry into the indoor direction can be minimized, thereby minimizing the deformation of the front panel cross beam and preventing indoor passengers from being injured.

[0255] Fifth embodiment

[0256] Fig.33 and Fig.34 is a perspective view showing a steel insert of a dash cross member according to a fifth embodiment of the present invention, Fig.35 and Fig.36 1 is a perspective view showing a steel-inserted plastic dash cross member according to a fifth embodiment of the present invention.

[0257] The steel-insert plastic dash panel cross beam 100 according to the fifth embodiment of the present invention is manufactured in the following manner: when the steel insert is inserted into the cavity of the injection mold, plastic material is injected into the cavity of the injection mold at a predetermined pressure, thereby manufacturing a combination of the steel insert 200 and the plastic injection molded part 300.

[0258] like Fig.39 As shown, the steel-inserted plastic dash beam according to the fifth embodiment of the present invention is made into the following structure: an impact absorbing plate 329 is formed on the vehicle body mounting frame 320 in the structure of the plastic injection molding part 300, and the impact absorbing plate 329 is formed by a plastic weight reduction operation.

[0259] like Fig.33 As shown, the steel insert 200 includes: a main beam 210 made of a "C"-shaped cross-sectional structure open toward the front; a center support frame 220 connected to a predetermined position on the rear surface of the main beam 210 and extending downward; and a steering gear lower side mounting frame 230 connected to a predetermined position on the front part of the main beam 210 and protruding toward the front.

[0260] The main beam 210 is disposed in the left and right lateral directions in front of the driver's seat and the passenger seat, and both side ends are assembled and fixed to the left and right side panels of the vehicle body to maintain the rigidity of the dash cross beam 100 and play a role as a skeleton.

[0261] The upper end of the center support frame 220 is mounted on the rear surface of the main beam 210 , and the lower end thereof is mounted on the bottom plate of the vehicle body, so that the center support frame 220 plays a role in supporting the main beam 210 .

[0262] For this reason, Fig.33 and Fig.34 As shown, the above-mentioned center support frame 220 includes a main frame 221, a neck frame 222, a first assembly plate 223 and a second assembly plate 224. The main frame 221 is arranged along the up and down direction and the lower end portion is assembled to the bottom plate of the lower part of the vehicle body. The neck frame 222 is formed as a whole with the upper part of the main frame 221. The first assembly plate 223 and the second assembly plate 224 are formed on the upper part of the above-mentioned neck frame 222 and are overlapped and assembled on the rear surface of the above-mentioned main beam 210.

[0263] A forming hole 222-1 is formed through one side of the neck frame 222, and the forming hole 222-1 is used to form the cockpit mounting frame 330 in the structure of the plastic injection molding part 300. A protruding hole 222-1 is formed on the other side of the neck frame 222 to facilitate the removal of the injection mold. The bent portion 222-2 has a shaped cross-section.

[0264] At this time, the above-mentioned bending portion 222-2 can not only provide a function of facilitating the removal of the injection mold, but also enhance the rigidity of the neck frame 222 to prevent the neck frame 222 from being deformed due to collision energy.

[0265] The first assembly plate 223 and the second assembly plate 224 are plate structures with curved cross-sections extending upward in two directions from one side and the other side of the neck frame 222, respectively. They overlap the rear surface of the main beam 210 and are installed by welding or the like.

[0266] Thus, the first assembly plate 223 and the second assembly plate 224 are welded to overlap with the rear surface of the main beam 210, so that the rigidity of the main beam 210 can be enhanced by the first assembly plate 223 and the second assembly plate 224, and deformation of the main beam 210 caused by collision energy can be prevented.

[0267] In particular, on the above-mentioned main beam 210 and the second assembly plate 224, a weight-reducing hole 227 for removing the mold and absorbing the impact is formed along the up and down direction. The weight-reducing hole 227 is also used for plastic weight reduction, so that an impact absorbing plate 329 is formed on the vehicle body mounting frame 320 in the structure of the above-mentioned plastic injection molding part 300.

[0268] After the steel insert 200 formed with the above-mentioned structure is inserted into the cavity of the injection mold, an injection molding process of injecting plastic material into the cavity of the injection mold can be used to produce a steel insert plastic front panel beam 100 in a form in which the steel insert 200 and the plastic injection molded part 300 are combined.

[0269] like Fig.35 and Fig.36 As shown, the plastic injection molding part 300 injection molded on the above-mentioned steel insert 200 includes a main injection molding part 310, a vehicle body mounting frame 320 and a cockpit mounting frame 330. The main injection molding part 310 is formed overlapping with the surfaces of the main beam 210 of the above-mentioned steel insert 200 and the first assembly plate 223 and the second assembly plate 224. The vehicle body mounting frame 320 is arranged to protrude forward from the front part of the main beam 210, and the cockpit mounting frame 330 is formed to close the molding hole 222-1 of the above-mentioned neck frame 222 and protrude rearward.

[0270] The main injection portion 310 is injection-molded so as to overlap with the surfaces of the main beam 210 , the first mounting plate 223 , the second mounting plate 224 , etc., and functions as a framework of the dash cross member 100 together with the main beam 210 .

[0271] For this reason, Fig.37 and Fig.38 As shown, the main injection molding part 310 includes a horizontal plate-shaped protective body 311, which is formed to overlap with the rear surface of the main beam 210 and the surfaces of the first assembly plate 223 and the second assembly plate 224, and is formed to protrude forward on the front side of the main beam 210 to protect the main beam 210 from being damaged by collision energy.

[0272] Therefore, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molded portion 310 and the protective body 311, the rigidity is enhanced by overlapping the first assembly plate 223 and the second assembly plate 224 on the main beam 210, so the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings from being torn or deformed.

[0273] The front end of the vehicle body mounting frame 320 is mounted at a predetermined position of the vehicle body to support the dash cross member 100 and to preliminarily buffer the collision energy generated by a collision accident.

[0274] On the main beam 210 and the second assembly plate 224 , weight-reducing holes 227 are formed through the upper and lower directions. The weight-reducing holes 227 are used for plastic weight reduction, so that an impact absorbing plate 329 is formed on the vehicle body mounting frame 320 in the structure of the plastic injection molding part 300 .

[0275] For this reason, Fig.39 As shown, the vehicle body mounting frame 320 includes a reinforcing filling portion 327, an impact absorbing plate 329 and a vehicle body assembly plate 323. The reinforcing filling portion 327 is formed by filling the front portion (the recessed portion of the "C"-shaped cross-section) of the main beam 210, the impact absorbing plate 329 is integrally connected to the lower portion of the filling portion 327, and the vehicle body assembly plate 323 extends forward from the lower portion of the impact absorbing plate 329 and is installed at a predetermined position on the vehicle body.

[0276] At this time, a plastic weight-reducing groove 329-1 is formed between the filling portion 327 and the impact absorbing plate 329. Fig.39 As shown, the plastic weight-reducing mold 228 is taken out upward through the weight-reducing hole 227 formed in the main beam 210 and the second assembly plate 224, thereby forming the plastic weight-reducing groove 329-1.

[0277] Thus, the filling portion 327 of the vehicle body mounting bracket 320 is integrally connected to the main beam 210 of the steel insert 200 by injection molding, thereby enhancing the rigidity of the vehicle body mounting bracket 320 and maintaining the vehicle body mounting bracket 320 in a state of being protruded forward.

[0278] In addition, the impact absorbing plate 329 and the plastic weight-reducing groove 329 - 1 of the vehicle body mounting frame 320 can absorb the collision energy generated by the front collision, thereby reducing the collision energy transmitted to the main beam 210 and the main injection molding part 310 , thereby preventing the deformation and damage of the front panel cross beam 100 .

[0279] In addition, if Fig.49As shown, a fracture guide groove 324 can be further formed at the neck of the above-mentioned vehicle body mounting frame 320, so that the vehicle body mounting frame 320 can preliminarily buffer the collision energy generated by the collision accident, and when the collision energy is greater than a predetermined value, the above-mentioned fracture guide groove 324 is fractured, thereby minimizing the collision energy transmitted to the main beam 210 and the main injection molded part 310 of the steel insert 200.

[0280] The cockpit mounting frame 330 can provide a mounting surface for the components located on the rear side of the dash cross member 100 among the components constituting the cockpit module.

[0281] For this reason, Fig.36 As shown, the cockpit mounting frame 330 is formed in a shape that closes the formed hole 222 - 1 formed on one side of the neck frame 222 and is protruded rearward.

[0282] Therefore, if Fig.37 , Fig.38 and Fig.40 As shown, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molded portion 310 and the protective body 311, since the first assembly plate 223 and the second assembly plate 224 are overlapped on the main beam 210 surrounded by the main injection molded portion 310 to enhance the rigidity, the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings which are arranged to close the forming hole 222-1 and protrude rearward and are prevented from being torn or deformed.

[0283] Preferably, if Fig.36 As shown, another cockpit mounting frame 330-1 protruding rearward can be integrally injection-molded on the main beam 210 at a position separated from the neck frame 222 of the above-mentioned center support frame 220, and the cockpit mounting frame 330-1 serves to provide a mounting surface for other components constituting the cockpit module.

[0284] Reference Fig.39 A front-to-rear direction mold removal space 325-2 for removing the injection mold along the front-to-rear direction is formed below the body assembly plate 323 of the above-mentioned body mounting frame 320, and a top-to-bottom direction mold removal space 326 for removing the injection mold along the top-to-bottom direction is formed above the above-mentioned body assembly plate 323.

[0285] Reference Fig.40 Through the bending portion 222-2 of the neck frame 222, a mold removal space 325-3 in the front-rear direction is also formed in the plastic injection molding portion surrounding the bending portion 222-2.

[0286] Therefore, the mold can be easily removed after the injection molding process through the front-to-back direction mold removal spaces 325-2, 325-3 and the up-down direction mold removal space 326.

[0287] On the other hand, a steering gear lower mounting frame 230 is integrally connected to a predetermined position on the front side of the main beam 210 of the steel insert 200 and is arranged to protrude forward. The steering gear lower mounting frame 230 is used to support the lower part of the steering column and the like.

[0288] Reference Fig.50 The steering gear lower side mounting frame 230 of the steel insert 200 is connected to the main beam 210 as a whole through a steel bar 231 of a predetermined length.

[0289] Therefore, when collision energy is applied to the steering gear lower mounting frame 230, the steel bar 231 buffers the collision energy while deforming, so that the steering column and the like mounted on the steering gear lower mounting frame 230 will not deviate significantly from their original position, and can also minimize entry into the room.

[0290] The plastic material is also injection molded onto the steering gear lower mounting frame 230 of the steel insert 200 , and therefore, the plastic injection molded portion 300 is configured to further include a plastic injection molded bracket 340 formed on the steel bar 231 and the steering gear lower mounting frame 230 .

[0291] Preferably, if Fig.50 As shown, a plurality of deformation guide holes 232 for absorbing collision energy and guiding deformation are formed on the upper plate portion of the steering gear lower side mounting frame 230 .

[0292] Reference Fig.51 and Fig.52 The above-mentioned plastic injection molded bracket 340 may include a first injection molded bracket portion 341 and a second injection molded bracket portion 342. The first injection molded bracket portion 341 is formed in a manner of surrounding the above-mentioned steel bar 231, and the second injection molded bracket portion 342 is formed in an overlapping manner with the upper surface, two side surfaces and bottom surface portion of the above-mentioned steering gear lower side mounting frame 230.

[0293] In addition, if Fig.51 As shown, a step portion 343 for guiding bending and breaking is formed at the upper surface boundary portion of the first injection molded bracket portion 341 and the second injection molded bracket portion 342 .

[0294] At this time, a floating nut 234 for bolting with the vehicle body is welded in advance to the steering gear lower mounting frame 230 because it is difficult to insert-mold the floating nut with plastic.

[0295] Therefore, if the collision energy generated by the front collision is applied to the above-mentioned steering gear lower side mounting frame 230, the above-mentioned deformation guide hole 232 can absorb the initial collision energy while deforming, and through the step portion 343 formed at the boundary portion of the above-mentioned first injection molded bracket portion 341 and the second injection molded bracket portion 342, the bending and breaking deformation of the steering gear lower side mounting frame 230 can be guided. On this basis, the above-mentioned steel bar 231 deforms and further buffers the collision energy. As a result, the steering column and the like assembled on the steering gear lower side mounting frame 230 basically will not deviate significantly from its original position, and the entry into the indoor direction can be minimized, thereby minimizing the deformation of the front panel cross beam and preventing indoor passengers from being injured.

[0296] Sixth embodiment

[0297] Fig.41 and Fig.42 is a perspective view showing a steel insert of a dash cross member according to a sixth embodiment of the present invention, Fig.43 and Fig.44 1 is a perspective view showing a steel-inserted plastic dash cross member according to a sixth embodiment of the present invention.

[0298] The steel-insert plastic dash panel cross beam 100 according to the sixth embodiment of the present invention is manufactured in the following manner: when the steel insert is inserted into the cavity of the injection mold, plastic material is injected into the cavity of the injection mold at a predetermined pressure, thereby manufacturing a combination of the steel insert 200 and the plastic injection molded part 300.

[0299] like Fig.42 As shown, the steel-insert plastic front panel cross beam based on the sixth embodiment of the present invention has a similar structure to the fifth embodiment described above, and also includes a connecting plate 225 in the structure of the center support frame 220, which connects the first assembly plate 223 and the second assembly plate 224 into one body, and is overlapped and assembled on the main beam 210 of the steel insert 200.

[0300] like Fig.41 As shown, the steel insert 200 includes: a main beam 210 made of a "C"-shaped cross-sectional structure open toward the front; a center support frame 220 connected to a predetermined position on the rear surface of the main beam 210 and extending downward; and a steering gear lower side mounting frame 230 connected to a predetermined position on the front part of the main beam 210 and protruding forward.

[0301] The main beam 210 is disposed in the left and right lateral directions in front of the driver's seat and the passenger seat, and both side ends are assembled and fixed to the left and right side panels of the vehicle body to maintain the rigidity of the dash cross beam 100 and play a role as a skeleton.

[0302] The upper end of the center support frame 220 is mounted on the rear surface of the main beam 210 , and the lower end thereof is mounted on the bottom plate of the vehicle body, so that the center support frame 220 plays a role in supporting the main beam 210 .

[0303] For this reason, Fig.41 and Fig.42 As shown, the above-mentioned center support frame 220 includes a main frame 221, a neck frame 222, a first assembly plate 223, a second assembly plate 224 and a connecting plate 225. The main frame 221 is arranged along the up and down direction and the lower end portion is assembled to the bottom plate of the lower part of the vehicle body. The neck frame 222 is formed as a whole with the upper part of the main frame 221. The first assembly plate 223 and the second assembly plate 224 are formed on the upper part of the above-mentioned neck frame 222 and are overlapped and assembled on the rear surface of the above-mentioned main beam 210. The connecting plate 225 connects the above-mentioned first assembly plate 223 and the second assembly plate 224 as a whole and overlaps and is assembled on the rear surface of the above-mentioned main beam 210.

[0304] A forming hole 222-1 is formed through one side of the neck frame 222, and the forming hole 222-1 is used to form the cockpit mounting frame 330 in the structure of the plastic injection molding part 300. A protruding hole 222-1 is formed on the other side of the neck frame 222 to facilitate the removal of the injection mold. The bent portion 222-2 has a shaped cross-section.

[0305] At this time, the above-mentioned bending portion 222-2 can not only provide a function of facilitating the removal of the injection mold, but also enhance the rigidity of the neck frame 222 to prevent the neck frame 222 from being deformed due to collision energy.

[0306] The first assembly plate 223 and the second assembly plate 224 are plate structures with curved cross-sections that extend upward in two directions from one side and the other side of the neck frame 222, respectively, and overlap on the rear surface of the main beam 210 and are installed by welding or the like. In addition, the connecting plate 225 that connects the first assembly plate 223 and the second assembly plate 224 into one body also overlaps on the rear surface of the main beam 210 and is installed by welding or the like.

[0307] Thus, the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 are welded to the rear surface of the main beam 210 in an overlapping manner, so that the rigidity of the main beam 210 can be enhanced by the first assembly plate 223, the second assembly plate 224 and the connecting plate 225, and deformation of the main beam 210 caused by collision energy can be prevented.

[0308] In particular, on the main beam 210 and the second assembly plate 224 , weight-reducing holes 227 are formed through the upper and lower directions. The weight-reducing holes 227 are used for plastic weight reduction, so that an impact absorbing plate 329 is formed on the vehicle body mounting frame 320 in the structure of the plastic injection molding part 300 .

[0309] After the steel insert 200 formed with the above-mentioned structure is inserted into the cavity of the injection mold, an injection molding process of injecting plastic material into the cavity of the injection mold can be used to produce a steel insert plastic front panel beam 100 in a form in which the steel insert 200 and the plastic injection molded part 300 are combined.

[0310] like Fig.43 and Fig.44 As shown, the plastic injection molding part 300 injection molded on the above-mentioned steel insert 200 includes a main injection molding part 310, a body mounting frame 320 and a cockpit mounting frame 330. The main injection molding part 310 is formed overlapping with the surfaces of the main beam 210, the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 of the above-mentioned steel insert 200. The body mounting frame 320 is arranged to protrude forward from the front part of the main beam 210, and the cockpit mounting frame 330 is formed to close the forming hole 222-1 of the above-mentioned neck frame 222 and protrude rearward.

[0311] The main injection molded portion 310 is injection molded so as to overlap the surfaces of the main beam 210 , the first and second mounting plates 223 , 224 , and the connecting plate 225 , and functions as a framework of the dash cross member 100 together with the main beam 210 .

[0312] For this reason, Fig.45 and Fig.46 As shown, the main injection molding part 310 includes a horizontal plate-shaped protective body 311, which is formed to overlap with the rear surface of the main beam 210, the first assembly plate 223, the second assembly plate 224 and the surface of the connecting plate 225, and is formed to protrude forward on the front side of the main beam 210 to protect the main beam 210 from being damaged by collision energy.

[0313] Therefore, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molding portion 310 and the protective body 311, the rigidity is enhanced by overlapping the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 on the main beam 210, so the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings from being torn or deformed.

[0314] The front end of the vehicle body mounting frame 320 is mounted at a predetermined position of the vehicle body to support the dash cross member 100 and to preliminarily buffer the collision energy generated by a collision accident.

[0315] On the main beam 210 and the second assembly plate 224 , weight-reducing holes 227 are formed through the upper and lower directions. The weight-reducing holes 227 are used for plastic weight reduction, so that an impact absorbing plate 329 is formed on the vehicle body mounting frame 320 in the structure of the plastic injection molding part 300 .

[0316] For this reason, Fig.47 As shown, the vehicle body mounting frame 320 includes a reinforcing filling portion 327, an impact absorbing plate 329 and a vehicle body assembly plate 323. The reinforcing filling portion 327 is formed by filling the front portion (the recessed portion of the "C"-shaped cross-section) of the main beam 210, the impact absorbing plate 329 is integrally connected to the lower portion of the filling portion 327, and the vehicle body assembly plate 323 extends forward from the lower portion of the impact absorbing plate 329 and is installed at a predetermined position on the vehicle body.

[0317] At this time, a plastic weight-reducing groove 329-1 is formed between the filling portion 327 and the impact absorbing plate 329. Fig.47 As shown, the plastic weight-reducing mold 228 is taken out upward through the weight-reducing hole 227 formed in the main beam 210 and the second assembly plate 224, thereby forming the plastic weight-reducing groove 329-1.

[0318] Thus, the filling portion 327 of the vehicle body mounting bracket 320 is integrally connected to the main beam 210 of the steel insert 200 by injection molding, thereby enhancing the rigidity of the vehicle body mounting bracket 320 and maintaining the vehicle body mounting bracket 320 in a state of being protruded forward.

[0319] In addition, the impact absorbing plate 329 and the plastic weight-reducing groove 329 - 1 of the vehicle body mounting frame 320 can absorb the collision energy generated by the front collision, thereby reducing the collision energy transmitted to the main beam 210 and the main injection molding part 310 , thereby preventing the deformation and damage of the front panel cross beam 100 .

[0320] In addition, if Fig.49 As shown, a fracture guide groove 324 can be further formed at the neck of the above-mentioned vehicle body mounting frame 320, so that the vehicle body mounting frame 320 can preliminarily buffer the collision energy generated by the collision accident, and when the collision energy is greater than a predetermined value, the above-mentioned fracture guide groove 324 is fractured, thereby minimizing the collision energy transmitted to the main beam 210 and the main injection molded part 310 of the steel insert 200.

[0321] The cockpit mounting frame 330 can provide a mounting surface for the components located on the rear side of the dash cross member 100 among the components constituting the cockpit module.

[0322] For this reason, Fig.44As shown, the cockpit mounting frame 330 is formed in a shape that closes the formed hole 222 - 1 formed on one side of the neck frame 222 and is protruded rearward.

[0323] Therefore, if Fig.45 , Fig.46 and Fig.48 As shown, even if the collision energy generated by the collision accident is transmitted to the front end portion of the main injection molding portion 310 and the protective body 311, since the main beam 210 surrounded by the main injection molding portion 310 is overlapped with the first assembly plate 223, the second assembly plate 224 and the connecting plate 225 to enhance the rigidity, the collision energy transmitted to the cockpit mounting frame 330 can be minimized, thereby preventing the cockpit mounting frame 330 and its surroundings which are closed with the forming hole 222-1 and protruding rearward and are arranged to be torn or deformed.

[0324] Preferably, if Fig.44 As shown, another cockpit mounting frame 330-1 protruding rearward can be integrally injection-molded on the main beam 210 at a position separated from the neck frame 222 of the above-mentioned center support frame 220, and the cockpit mounting frame 330-1 serves to provide a support surface for other components constituting the cockpit module.

[0325] Reference Fig.47 A front-to-rear direction mold removal space 325-2 for removing the injection mold along the front-to-rear direction is formed below the body assembly plate 323 of the above-mentioned body mounting frame 320, and a top-to-bottom direction mold removal space 326 for removing the injection mold along the top-to-bottom direction is formed above the above-mentioned body assembly plate 323.

[0326] Reference Fig.48 Through the bending portion 222-2 of the neck frame 222, a mold removal space 325-3 in the front-rear direction is also formed in the plastic injection molding portion surrounding the bending portion 222-2.

[0327] Therefore, the mold can be easily removed after the injection molding process through the front-to-back direction mold removal spaces 325-2, 325-3 and the up-down direction mold removal space 326.

[0328] On the other hand, a steering gear lower mounting frame 230 is integrally connected to a predetermined position on the front side of the main beam 210 of the steel insert 200 and is arranged to protrude forward. The steering gear lower mounting frame 230 is used to support the lower part of the steering column and the like.

[0329] Reference Fig.50 The steering gear lower side mounting frame 230 of the steel insert 200 is connected to the main beam 210 as a whole through a steel bar 231 of a predetermined length.

[0330] Therefore, when collision energy is applied to the steering gear lower mounting frame 230, the steel bar 231 buffers the collision energy while deforming, so that the steering column and the like mounted on the steering gear lower mounting frame 230 will not deviate significantly from their original position, and can also minimize entry into the room.

[0331] The plastic material is also injection molded onto the steering gear lower mounting frame 230 of the steel insert 200 , and therefore, the plastic injection molded portion 300 is configured to further include a plastic injection molded bracket 340 formed on the steel bar 231 and the steering gear lower mounting frame 230 .

[0332] Preferably, if Fig.50 As shown, a plurality of deformation guide holes 232 for absorbing collision energy and guiding deformation are formed on the upper plate portion of the steering gear lower side mounting frame 230 .

[0333] Reference Fig.51 and Fig.52 The above-mentioned plastic injection molded bracket 340 may include a first injection molded bracket portion 341 and a second injection molded bracket portion 342. The first injection molded bracket portion 341 is formed in a manner of surrounding the above-mentioned steel bar 231, and the second injection molded bracket portion 342 is formed in an overlapping manner with the upper surface, two side surfaces and bottom surface portion of the above-mentioned steering gear lower side mounting frame 230.

[0334] In addition, if Fig.51 As shown, a step portion 343 for guiding bending and breaking is formed at the upper surface boundary portion of the first injection molded bracket portion 341 and the second injection molded bracket portion 342 .

[0335] At this time, a floating nut 234 for bolting with the vehicle body is pre-welded to the steering gear lower mounting frame 230 because it is difficult to insert-mold the floating nut with plastic.

[0336] Therefore, if the collision energy generated by the front collision is applied to the above-mentioned steering gear lower side mounting frame 230, the above-mentioned deformation guide hole 232 can absorb the initial collision energy while deforming, and through the step portion 343 formed at the boundary portion of the above-mentioned first injection molded bracket portion 341 and the second injection molded bracket portion 342, the bending and breaking deformation of the steering gear lower side mounting frame 230 can be guided. On this basis, the above-mentioned steel bar 231 deforms and further buffers the collision energy. As a result, the steering column and the like assembled on the steering gear lower side mounting frame 230 basically will not deviate significantly from its original position, and the entry into the indoor direction can be minimized, thereby minimizing the deformation of the front panel cross beam and preventing indoor passengers from being injured.

[0337] The present invention has been described in detail with reference to the accompanying drawings and the above-mentioned various embodiments, but the present invention is not limited thereto. Those skilled in the art can make various modifications and improvements to the present invention without departing from the scope of the technical concept described in the claims.

Claims

1. A steel-inserted plastic dash crossbeam, characterized in that: include: a steel insert including a main beam and a center support frame mounted on the main beam; as well as A plastic injection molding part, which is injection molded on the steel insert, The central support frame includes a main frame, a neck frame, a first assembly plate and a second assembly plate. The main frame is installed at the lower part of the vehicle body. The neck frame is formed on the upper part of the main frame. A first mounting plate and a second mounting plate are formed on the upper portion of the neck frame and mounted on the main beam, A through hole for forming and removing a mold for the vehicle body mounting bracket is formed through the main beam and the second assembly plate along the front-rear direction. The plastic injection molding part comprises: a main injection molded portion formed to overlap with the main beam and the first and second assembly plates; and The vehicle body mounting frame closes the through hole, is formed to overlap the main beam and the second mounting plate, and protrudes forward.

2. The steel-inserted plastic dash cross member according to claim 1, characterized in that: The plastic injection molding part further comprises a cockpit mounting frame, which is formed on one side of the neck frame and protrudes rearward.

3. The steel-inserted plastic dash cross member according to claim 1, characterized in that: The central support frame further comprises a connecting plate, which connects the first assembly plate and the second assembly plate into one body and is assembled to the main beam.

4. The steel-inserted plastic dash cross member according to claim 2, characterized in that: A forming hole for forming the cockpit mounting frame is formed through one side of the neck frame.

5. The steel-inserted plastic dash cross member according to claim 1, characterized in that: A protruding portion is formed on the other side of the neck frame for removing the mold. The bending part of the shaped cross section.

6. The steel-inserted plastic dash cross member according to claim 1, characterized in that: The vehicle body mounting bracket comprises: A reinforcing plate, which closes the through hole; a reinforcing rib extending rearward from the reinforcing plate and connected to a periphery of the through hole; and a vehicle body mounting plate extending forward from a lower portion of the reinforcing plate, A front-rear direction mold removal space for removing the mold in the front-rear direction is formed above and below the reinforcing rib and below the vehicle body assembly plate, and a top-bottom direction mold removal space for removing the mold in the top-bottom direction is formed above the vehicle body assembly plate.

7. The steel-inserted plastic dash cross member according to claim 6, characterized in that: A fracture guide groove is formed on the neck of the vehicle body mounting bracket.

8. The steel-inserted plastic dash cross member according to claim 1, characterized in that: The steel insert also includes a steering gear lower side mounting frame connected to the main beam through a steel bar, The plastic injection molding part also includes a plastic injection molding bracket formed on the steel bar and the lower side mounting frame of the steering gear.

9. The steel-inserted plastic dash cross member according to claim 8, characterized in that: The plastic injection-molded bracket includes a first injection-molded bracket portion and a second injection-molded bracket portion. The first injection-molded bracket portion is formed in a manner of surrounding the steel bar, and the second injection-molded bracket portion is formed to overlap with the upper plate portion, both side surfaces, and the bottom portion of the steering gear lower mounting frame.

10. The steel-inserted plastic dash cross member according to claim 9, characterized in that: A step portion for guiding bending and breaking is formed at an upper surface boundary portion between the first injection molded bracket portion and the second injection molded bracket portion.

11. The steel-inserted plastic dash cross member according to claim 8, characterized in that: A deformation guide hole for absorbing collision energy and guiding deformation is formed on an upper plate portion of the steering gear lower mounting frame.

12. A steel-inserted plastic dash cross beam, characterized in that: include: a steel insert including a main beam and a center support frame mounted on the main beam; as well as A plastic injection molding part, which is injection molded on the steel insert, The central support frame includes a main frame, a neck frame, a first assembly plate and a second assembly plate. The main frame is installed at the lower part of the vehicle body. The neck frame is formed on the upper part of the main frame. A first mounting plate and a second mounting plate are formed on the upper portion of the neck frame and mounted on the main beam, The plastic injection molding part comprises: a main injection molded portion formed to overlap with the main beam and the first and second assembly plates; and The vehicle body mounting frame is formed to overlap with the main beam and the second mounting plate and protrude forward.

13. The steel-inserted plastic dash cross member according to claim 12, characterized in that: The plastic injection molding part further comprises a cockpit mounting frame, which is formed on one side of the neck frame and protrudes rearward.

14. The steel-inserted plastic dash cross member according to claim 12, characterized in that: The central support frame further comprises a connecting plate, which connects the first assembly plate and the second assembly plate into one body and is assembled to the main beam.

15. The steel-inserted plastic dash cross member according to claim 13, characterized in that: A shaped hole for forming the cockpit mounting bracket is formed through one side of the neck bracket.

16. The steel-inserted plastic dash cross member of claim 12, characterized in that: A protruding portion is formed on the other side of the neck frame for removing the mold. The bending part of the shaped cross section.

17. The steel-inserted plastic dash cross member of claim 12, characterized in that: The vehicle body mounting bracket comprises: a reinforcing filling portion formed by filling the front portion of the main beam; and a vehicle body mounting plate extending forward from a lower portion of the filling portion, The filling portion is taken out by rotating the mold core to form a curved weight-reducing groove structure, or the filling portion is taken out by horizontally moving the mold core to form a horizontal plate-shaped protective body with a weight-reducing groove, and a front-to-back direction mold removal space for removing the mold along the front-to-back direction is formed below the vehicle body assembly plate.

18. The steel-inserted plastic dash cross member according to claim 17, characterized in that: A fracture guide groove is formed on the neck of the vehicle body mounting bracket.

19. The steel-inserted plastic dash cross member of claim 12, characterized in that: The steel insert also includes a steering gear lower side mounting frame connected to the main beam through a steel bar, The plastic injection molding part also includes a plastic injection molding bracket formed on the steel bar and the lower side mounting frame of the steering gear.

20. The steel-inserted plastic dash cross member of claim 19, characterized in that: The plastic injection-molded bracket includes a first injection-molded bracket portion and a second injection-molded bracket portion. The first injection-molded bracket portion is formed in a manner of surrounding the steel bar, and the second injection-molded bracket portion is formed to overlap with the upper plate portion, both side surfaces, and the bottom portion of the steering gear lower mounting frame.

21. The steel-inserted plastic dash cross member of claim 20, characterized in that: A step portion for guiding bending and breaking is formed at an upper surface boundary portion between the first injection molded bracket portion and the second injection molded bracket portion.

22. The steel-inserted plastic dash cross member of claim 19, wherein: A deformation guide hole for absorbing collision energy and guiding deformation is formed on an upper plate portion of the steering gear lower mounting frame.

23. A steel-inserted plastic dash cross beam, characterized in that: include: a steel insert including a main beam and a center support frame mounted on the main beam; as well as A plastic injection molding part, which is injection molded on the steel insert, The central support frame includes a main frame, a neck frame, a first assembly plate and a second assembly plate. The main frame is installed at the lower part of the vehicle body. The neck frame is formed on the upper part of the main frame. A first mounting plate and a second mounting plate are formed on the upper portion of the neck frame and mounted on the main beam, A weight-reducing hole for removing the mold and absorbing impact is formed through the main beam and the upper part of the second assembly plate in the up-down direction. The plastic injection molding part comprises: a main injection molded portion formed to overlap with the main beam and the first and second assembly plates; and The vehicle body mounting frame opens the lightening hole, is formed to overlap the main beam and the second mounting plate, and protrudes forward.

24. The steel-inserted plastic dash cross member of claim 23, characterized in that: The plastic injection molding part further comprises a cockpit mounting frame, which is formed on one side of the neck frame and protrudes rearward.

25. The steel-inserted plastic dash cross member of claim 23, wherein: The central support frame further comprises a connecting plate, which connects the first assembly plate and the second assembly plate into one body and is assembled to the main beam.

26. The steel-inserted plastic dash cross member of claim 24, wherein: A forming hole for forming the cockpit mounting frame is formed through one side of the neck frame.

27. The steel-inserted plastic dash cross member of claim 23, characterized in that: A protruding portion is formed on the other side of the neck frame for removing the mold. The bending part of the shaped cross section.

28. The steel-inserted plastic dash cross member of claim 23, wherein: The vehicle body mounting bracket comprises: A reinforcing filling portion, which is formed by filling the front portion of the main beam; an impact absorbing plate integrally connected to a lower portion of the filling portion; and a vehicle body mounting plate extending forward from a lower portion of the impact absorbing plate, A plastic weight-reducing groove is formed between the filling portion and the impact absorbing plate by taking out the mold from the weight-reducing hole, and a front-to-rear direction mold taking-out space for taking out the mold along the front-to-rear direction is formed below the vehicle body assembly plate, and a top-to-bottom direction mold taking-out space for taking out the mold along the top-to-bottom direction is formed above the vehicle body assembly plate.

29. The steel-inserted plastic dash cross member of claim 28, characterized in that: A fracture guide groove is formed on the neck of the vehicle body mounting bracket.

30. The steel-inserted plastic dash cross member of claim 23, wherein: The steel insert also includes a steering gear lower side mounting frame connected to the main beam through a steel bar, The plastic injection molding part also includes a plastic injection molding bracket formed on the steel bar and the lower side mounting frame of the steering gear.

31. The steel-inserted plastic dash cross member of claim 30, wherein: The plastic injection-molded bracket includes a first injection-molded bracket portion and a second injection-molded bracket portion. The first injection-molded bracket portion is formed in a manner of surrounding the steel bar, and the second injection-molded bracket portion is formed to overlap with the upper plate portion, both side surfaces, and the bottom portion of the steering gear lower mounting frame.

32. The steel-inserted plastic dash cross member of claim 31, characterized in that: A step portion for guiding bending and breaking is formed at an upper surface boundary portion between the first injection molded bracket portion and the second injection molded bracket portion.

33. The steel-inserted plastic dash cross member of claim 30, wherein: A deformation guide hole for absorbing collision energy and guiding deformation is formed on an upper plate portion of the steering gear lower mounting frame.

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