Injection molding device and method for automobile trim panel

Abstract

The invention belongs to the technical field of automobile trim panel production, and particularly relates to an injection molding device and method for an automobile trim panel, and the injection molding device for the automobile trim panel comprises a rack, an extrusion driving part, an upper mold body, a lower mold body, a temperature adjusting mechanism and a bubble treatment mechanism; the upper die body and the lower die body are connected to the rack side by side. A forming cavity is formed between the upper die body and the lower die body; the extrusion driving part is connected to the rack and is connected with the upper die body; the temperature adjusting mechanism is connected to the interior of the upper mold body and / or the lower mold body; the number of the bubble treatment mechanism is at least one, and the mounting end of the bubble treatment mechanism is connected to the upper die body and / or the lower die body; the processing end of the bubble processing mechanism movably extends into the forming cavity. According to the invention, bubble treatment on the surface of a plaque material which is about to be formed can be realized, so that the separation and discharge speed of bubbles is accelerated; and the processing and forming quality of the plaque is improved.

Description

Technical Field

[0001] This invention belongs to the field of automotive trim panel manufacturing technology, and particularly relates to an injection molding device and method for automotive trim panels. Background Technology

[0002] Automotive trim panels are components used to decorate and protect automobiles, and can be divided into two main categories: interior trim panels and exterior trim panels. The production and processing method for automotive trim panels is generally injection molding. Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of injection molding are high production speed and efficiency, and it can produce parts with complex shapes. Injection molding is suitable for mass production and molding of complex products, and its use is also very widespread in the production of automotive parts.

[0003] Currently, the injection molding method for automotive trim panels typically involves using a high-pressure injection molding machine to inject the material under high pressure. However, in some existing automotive trim panel injection molding processes, excessive air is mixed into the raw material (e.g., the hopper is not sealed during feeding, or the screw speed is too fast and air is trapped), or the raw material purity is insufficient (containing volatile impurities), or the injection speed is too fast, causing air to be trapped when the molten material fills at high speed, or the mold venting channels are blocked / inadequately designed, preventing air from being expelled; therefore, a large number of visible air bubbles will form on the surface of the trim panel, affecting the quality of the trim panel. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing an injection molding device for automotive trim panels, which can solve the technical problem that a large number of visible bubbles appear on the surface of the trim panels during the injection molding process.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An injection molding apparatus for automotive trim panels includes a frame, an extrusion drive component, an upper mold body, a lower mold body, a temperature control mechanism, and a bubble treatment mechanism. The upper mold body and the lower mold body are connected side by side to the frame; and a forming cavity is provided between the upper mold body and the lower mold body; the extrusion drive component is connected to the frame and to the upper mold body; the temperature adjustment mechanism is connected to the interior of the upper mold body and / or the lower mold body; the number of bubble treatment mechanisms is at least one, and the mounting end of the bubble treatment mechanism is connected to the upper mold body and / or the lower mold body; the processing end of the bubble treatment mechanism extends movably into the interior of the forming cavity.

[0006] Preferably, the extrusion drive component includes an extrusion lifting cylinder; the extrusion lifting cylinder is connected to the top of the frame and to the upper mold body.

[0007] Preferably, the bubble treatment mechanism includes a height adjustment component and at least one air guide needle; The mounting end of the height adjustment component is connected to the side of the upper mold body away from the molding cavity; the movable end of the height adjustment component is connected to one side of the corresponding air guide pin; the other side of the air guide pin passes through the upper mold body and extends into the molding cavity. And / or the mounting end of the height adjustment component is connected to the side of the lower mold body away from the molding cavity; the movable end of the height adjustment component is connected to one side of the corresponding air guide pin; the other side of the air guide pin passes through the lower mold body and extends into the molding cavity.

[0008] Preferably, the height adjustment component includes a height adjustment cylinder, a connecting plate, an assembly plate, and at least one support column; one end of the support column is connected to the lower mold body or the upper mold body; the bottom of the connecting plate is connected to the other end of the support column; the mounting end of the height adjustment cylinder is connected to the connecting plate; the movable end of the height adjustment cylinder is connected to the assembly plate; and one end of all the air guide pins is engaged inside the assembly plate.

[0009] Preferably, the air-guiding needle has an air-guiding channel inside, which extends through the height of the air-guiding needle; and the two ends of the air-guiding channel are respectively connected to the molding cavity and the outside of the air-guiding needle.

[0010] Preferably, the upper mold body has a first molding groove on one side surface facing the lower mold body; the upper mold body has a first material injection component; one end of the first material injection component is connected to the first molding groove; the lower mold body has a second molding groove on one side surface facing the upper mold body; the lower mold body has a second material injection component; one end of the second material injection component is connected to the second molding groove; and the molding cavity is formed between the second molding groove and the first molding groove.

[0011] Preferably, the first material injection assembly includes a first input pipe, a first branch pipe, and a first output pipe; the other end of the first input pipe is connected to one end of the first branch pipe; the first branch pipe is connected to the interior of the upper mold body; the other end of the first branch pipe is connected to one end of the first output pipe; the other end of the first output pipe extends to the first molding groove and is connected to the molding cavity. And / or, the second material injection assembly includes a second input pipe, a second branch pipe, and a second output pipe; the other end of the second input pipe is connected to one end of the second branch pipe; the second branch pipe is connected to the interior of the lower mold body; the other end of the second branch pipe is connected to one end of the second output pipe; the other end of the second output pipe extends to the second molding groove and is connected to the molding cavity.

[0012] Preferably, the temperature regulating mechanism includes a heating forming component and a cooling forming component; the heating end of the heating forming component and the cooling end of the cooling forming component are staggered.

[0013] Preferably, the heating and forming component includes a curved or irregularly shaped heating tube; the heating tube is connected to the interior of the lower mold body; And / or, the cooling forming component includes a heat exchange input pipe, a heat exchange output pipe, and a heat exchange circulation pipe; the heat exchange circulation pipe is connected to the interior of the lower mold body; the output end of the heat exchange input pipe is connected to one end of the heat exchange circulation pipe; the input end of the heat exchange output pipe is connected to the other end of the heat exchange circulation pipe.

[0014] The present invention also discloses an injection molding method for automotive trim panels, which performs the following steps based on the above-described injection molding apparatus for automotive trim panels: S1. Start the extrusion drive component to drive the upper mold body toward the lower mold body, thereby forming a molding cavity; S2. A first preset time amount of polypropylene raw material is conveyed into the molding cavity to form a first base layer at the bottom of the molding cavity. S3. Continue to feed the amount of polypropylene raw material for the second preset time into the molding cavity into the upper mold body, and at the same time feed the amount of polyurethane raw material for the second preset time into the molding cavity into the lower mold body to form an injection-molded mixture. S4. Perform a third preset heating treatment on the upper mold body and the lower mold body; S5, the bubble handling mechanism for the upper mold body and the bubble handling mechanism for the lower mold body; S6. Perform a cooling process on the upper and lower mold bodies for a fourth preset duration to obtain the automotive trim panel.

[0015] The beneficial effects of this invention are as follows: by employing the driving action of the extrusion drive component, a molding cavity with relatively sealed sides is formed between the upper and lower mold bodies. Combined with the temperature regulation mechanism to regulate the heat of the upper and lower mold bodies, the molding and cooling separation of the injection molded material are achieved quickly and orderly. Furthermore, the bubble treatment mechanism extends into the molding cavity to treat the bubbles on the surface of the decorative panel material that is about to be molded, thereby accelerating the separation and discharge of bubbles. This also helps to improve the quality of the decorative panel processing. Attached Figure Description

[0016] The following will refer to the appendix. Figures 1-9 The features, advantages and technical effects of exemplary embodiments of the present invention are described below.

[0017] Figure 1 This is a schematic diagram of the structure of an injection molding device for automotive trim panels according to an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of an injection molding device for automotive trim panels according to an embodiment of the present invention. Figure 3 This is a schematic diagram of the bubble treatment mechanism of an injection molding device for automotive trim panels according to an embodiment of the present invention. Figure 4 This is a schematic diagram of the upper and lower mold bodies of an injection molding device for automotive trim panels according to an embodiment of the present invention. Figure 5 This is an exploded view of the upper and lower mold bodies of an injection molding device for automotive trim panels according to an embodiment of the present invention. Figure 6 This is a schematic diagram of the air guide needle of the injection molding device for an automotive trim panel according to an embodiment of the present invention. Figure 7 This is a schematic diagram of the structure of the first injection support plate of the injection molding device for automotive trim panels according to an embodiment of the present invention. Figure 8 This is a schematic diagram of the structure of the second injection support plate of the injection molding device for automotive trim panels according to an embodiment of the present invention. Figure 9 This is a schematic diagram of the temperature regulating mounting plate of an injection molding device for automotive trim panels according to an embodiment of the present invention.

[0018] In the diagram: 100 - frame; 101 - molding cavity; 200 - Extrusion drive component; 210 - Extrusion lifting cylinder; 220 - Guide rod; 230 - Limiting cylinder; 300 - Upper mold body; 310 - First injection support plate; 312 - Fifth mounting hole; 311 - First limiting groove; 320 - First extrusion support plate; 321 - First molding groove; 322 - First mounting hole; 323 - Second mounting hole; 324 - First mounting groove; 330 - First mounting plate; 331 - Heat insulation top plate; 340 - First material injection assembly; 341 - First input pipe; 342 - First branch pipe; 343 - First output pipe; 400 - Lower mold body; 410 - Second injection support plate; 411 - Second limiting groove; 412 - Sixth mounting hole; 420 - Second extrusion support plate; 421 - Second molding groove; 422 - Third mounting hole; 423 - Fourth mounting hole; 424 - Second mounting groove; 430 - Second mounting plate; 431 - Seventh mounting hole; 432 - Third limiting groove; 433 - Fourth limiting groove; 440 - Second material injection assembly; 441 - Second input pipe; 442 - Second branch pipe; 443 - Second output pipe; 500 - Temperature regulation mechanism; 510 - Heating and forming component; 511 - Heating tube; 520 - Cooling and forming component; 521 - Heat exchange input tube; 522 - Heat exchange output tube; 523 - Heat exchange circulation tube; 600 - Bubble treatment mechanism; 610 - Height adjustment component; 611 - Height adjustment cylinder; 612 - Connecting plate; 613 - Assembly plate; 614 - Support column; 620 - Air guide needle; 621 - Air guide channel; 630 - Sealing traction assembly; 631 - Traction spring; 632 - Inclined connecting block; 633 - Sealing support plate; 634 - Mounting block. Detailed Implementation

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is intended to particularly describe embodiments and not to limit the scope of this application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0020] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the embodiment description, "multiple" refers to two or more, unless otherwise specifically defined.

[0021] The term 'embodiment' means that a particular feature, structure, or characteristic described exists in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0022] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or multiple situations existing alone. In addition, the character " / " in this document generally indicates that the related objects before and after are in an "or" relationship.

[0023] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can also refer to a mechanical connection or an electrical connection. They can be directly connected or indirectly connected through an intermediate medium, manifesting as internal communication between two components or an interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0024] The following is in conjunction with the appendix Figures 1-9 The present invention will be described in further detail, but this is not intended to limit the invention.

[0025] like Figure 1 As shown, in one embodiment of the present invention, the injection molding device for the automotive trim panel includes a frame 100, an extrusion drive component 200, an upper mold body 300, a lower mold body 400, a temperature regulating mechanism 500, and a bubble treatment mechanism 600. The upper mold body 300 and the lower mold body 400 are connected side-by-side to the frame 100; and a forming cavity 101 is provided between the upper mold body 300 and the lower mold body 400; the mounting end of the extrusion drive component 200 is connected to the top of the frame 100; the movable end of the extrusion drive component 200 is away from the top surface of the upper mold body 300 and the lower mold body 400, so that the upper mold body 300 can move toward or away from the lower mold body 400; the temperature adjustment mechanism 500 is connected to the interior of the upper mold body 300 and / or the lower mold body 400; the number of bubble treatment mechanisms 600 is at least one, and the mounting end of the bubble treatment mechanism 600 is connected to the upper mold body 300 and / or the lower mold body 400; the processing end of the bubble treatment mechanism 600 extends movably into the interior of the forming cavity 101.

[0026] The technical solution of this invention achieves a relatively sealed molding cavity between the upper and lower mold bodies by using an extrusion drive component. Combined with the temperature regulation mechanism to regulate the heat of the upper and lower mold bodies, this enables rapid and orderly molding and cooling separation of the injection molded material. Furthermore, a bubble treatment mechanism extends into the molding cavity to treat bubbles on the surface of the trim material as the molding process is nearing completion, thereby accelerating the separation and discharge of bubbles and improving the quality of the trim material processing.

[0027] Specifically, in some implementations, such as Figure 1 As shown, the extrusion drive component 200 includes an extrusion lifting cylinder 210; the mounting end of the extrusion lifting cylinder 210 is connected to the top of the frame 100; the movable end of the extrusion lifting cylinder 210 passes through the frame 100 and is connected to the upper mold body 300. In some embodiments, such as... Figure 1 As shown, the extrusion drive component 200 further includes at least one guide rod 220 and at least one limiting cylinder 230; the limiting cylinder 230 is connected to the top of any one or all of the frame 100, the upper die 300, and the lower die 400; the guide rod 220 passes through the frame 100, the limiting cylinder 230, the upper die 300, and the lower die 400. This structure, through the guiding action of the guide rod 220 combined with the lifting drive action of the upper extrusion lifting cylinder 210, ensures the orderliness and stability of the upper die 300's up and down extrusion operation.

[0028] In some implementation methods, such as Figure 1 As shown, there are two bubble treatment mechanisms 600, one located in the upper mold body 300 and the other in the lower mold body 400; the temperature regulating mechanism 500 is located inside the lower mold body 400. This structure uses the bubble treatment mechanisms 600 in both the upper and lower directions to treat the surface of the decorative panel to be injection molded, thereby accelerating the molding speed and improving the molding quality. In addition, the lower mold body 400 is heated and / or cooled by the temperature regulating mechanism 500 below. Under the action of natural air pressure airflow, most of the hot medium will flow upward naturally, and most of the cold medium will flow downward naturally, thereby improving energy utilization and increasing the molding speed.

[0029] Specifically, in some implementations, such as Figure 1 and 2As shown, each of the bubble treatment mechanisms 600 includes a height adjustment component 610 and at least one air guide pin 620; the mounting end of one of the height adjustment components 610 is connected to the side of the upper mold body 300 away from the molding cavity 101; the movable end of one of the height adjustment components 610 is connected to the side of the corresponding air guide pin 620; the other end of the air guide pin 620 passes through the upper mold body 300 and extends to the molding cavity 101; the mounting end of another height adjustment component 610 is connected to the side of the lower mold body 400 away from the molding cavity 101; the movable end of another height adjustment component 610 is connected to the side of the corresponding air guide pin 620; the other end of the air guide pin 620 passes through the lower mold body 400 and extends to the molding cavity 101. This structure, through the driving action of the height adjustment components 610 at both the upper and lower ends, enables the bubble-popping treatment operation on the upper and lower surfaces of the injection-molded product, thereby accelerating the separation and discharge of bubbles; and also helps to improve the quality of the decorative panel processing.

[0030] Specifically, in some embodiments, the air guide pin 620 in the lower mold body 400 and the air guide pin 620 in the upper mold body 300 are in the same height direction (e.g., Figure 2 The structure features a staggered arrangement (shown in the vertical direction). This structure, through the staggered arrangement of the air-guiding pins 620 at both the upper and lower ends, effectively avoids excessive stress concentration caused by simultaneous air bubble puncture operations on the injection-molded product, thus achieving stress decomposition through staggered arrangement; thereby ensuring both air bubble removal and structural stability of the molded product.

[0031] Specifically, in some implementations, such as Figure 2 and 3 As shown, the height adjustment component 610 includes a height adjustment cylinder 611, a connecting plate 612, an assembly plate 613, and at least one support column 614. One end of the support column 614 is connected to the lower mold body 400 or the upper mold body 300; the bottom of the connecting plate 612 is connected to the other end of the support column 614; the mounting end of the height adjustment cylinder 611 is connected to the connecting plate 612; the movable end of the height adjustment cylinder 611 is connected to the assembly plate 613; and one end of all the air guide pins 620 is engaged inside the assembly plate 613. This structure, driven by the height adjustment cylinder 611, enables the air guide pins 620 to move rapidly and stably up and down in a cyclic motion, thereby achieving the air bubble puncture treatment operation on the injection-molded product.

[0032] Specifically, in some implementations, such as Figure 3 and 6As shown, each of the air-guiding needles 620 is provided with an air-guiding channel 621, which extends through the height of the air-guiding needle 620; and the two ends of the air-guiding channel 621 are respectively connected to the outside of the forming cavity 101 and the air-guiding needle 620. In some embodiments, the inner diameter D of the air-guiding channel 621 satisfies: 0.4 mm ≤ D ≤ 0.8 mm; furthermore, D can be 0.41 mm, 0.42 mm, 0.43 mm, 0.44 mm, 0.45 mm, 0.8 mm, etc. Each of the gas-guiding needles 620 has a one-way breathable membrane on its side away from the molding cavity 101; the one-way breathable membrane is bonded to the assembly plate 613; and the one-way breathable membrane is made of a layered polyvinylidene fluoride (PVDF) coating, polytetrafluoroethylene (PTFE) and PVDF coating; or the one-way breathable membrane is made of a nano-sized silica (SiO2) coating, PTFE and nano-sized silica (SiO2) coating. This structure allows gas to pass through the molding cavity 101 in one direction while preventing liquid or reverse gas from permeating into the molding cavity 101.

[0033] Specifically, in some implementations, such as Figure 2 and 4 As shown in Figure 5, the upper mold body 300 has a first molding groove 321 on one side of its surface facing the lower mold body 400; a first material injection component 340 is provided inside the upper mold body 300; one end of the first material injection component 340 is connected to the first molding groove 321; the first material injection component 340 is used to convey polypropylene raw materials; the lower mold body 400 has a second molding groove 421 on one side of its surface facing the upper mold body 300; a second material injection component 440 is provided inside the lower mold body 400; one end of the second material injection component 440 is connected to the second molding groove 421; the second material injection component 440 is used to convey PU (polyurethane) raw materials; and the molding cavity 101 is formed between the second molding groove 421 and the first molding groove 321. This structure ensures sufficient polypropylene raw materials as a structural layer for the substrate by conveying polypropylene raw materials from the upper end; and combines the PU (polyurethane) raw materials conveyed from the upper and lower ends with the substrate for injection molding to reduce in-vehicle noise and improve tactile feel; and provides structural rigidity, impact resistance and dimensional stability.

[0034] Specifically, in some implementations, such as Figure 4 and 5As shown, the first material injection assembly 340 includes a first input pipe 341, a first branch pipe 342, and a first output pipe 343. One end of the first input pipe 341 is connected to a first storage tank for PU (polyurethane) raw materials and a first pump. The other end of the first input pipe 341 is connected to one end of the first branch pipe 342. The first branch pipe 342 is connected to the interior of the upper mold body 300. The other end of the first branch pipe 342 is connected to one end of the first output pipe 343. The other end of the first output pipe 343 extends to the first molding groove 321 and is connected to the molding cavity 101. The first branch pipe 342 can be a herringbone tee pipe or a four-way pipe with one input end and four output ends.

[0035] Specifically, in some implementations, such as Figure 4 and 5 As shown, the second material injection assembly 440 includes a second input pipe 441, a second branch pipe 442, and a second output pipe 443. One end of the second input pipe 441 is connected to a second storage tank for PU (polyurethane) raw materials and a second pump. The other end of the second input pipe 441 is connected to one end of the second branch pipe 442. The second branch pipe 442 is connected to the interior of the lower mold body 400. The other end of the second branch pipe 442 is connected to one end of the second output pipe 443. The other end of the second output pipe 443 extends to the second molding groove 421 and is connected to the molding cavity 101. The second branch pipe 442 can be a herringbone tee pipe or a four-way pipe with one input end and four output ends.

[0036] Specifically, in some implementations, such as Figure 1 and 2As shown, the upper mold body 300 includes a first mounting plate 330, a first injection support plate 310, and a first extrusion support plate 320 that are detachably connected as a single unit along the height direction; the mounting end of the bubble treatment mechanism 600 (middle height adjustment component 610) is connected to the heat insulation top plate 331 on the side surface of the first mounting plate 330 away from the first injection support plate 310, and the heat insulation top plate 331 is connected to the extrusion lifting cylinder 210; the first material injection assembly 340 is disposed between the first injection support plate 310 and the first extrusion support plate 320; the bubble treatment mechanism 600 (middle air guide needle 620) is disposed through the first mounting plate 330, the first injection support plate 310, and the first extrusion support plate 320 respectively. In some embodiments, the first mounting plate 330 and the first injection molding support plate 310 are detachably connected as one unit by a first bolt; the first injection molding support plate 310 and the first extrusion support plate 320 are detachably connected as one unit by a second bolt; and both ends of the first and second bolts are sealed with sealing plugs or other components. This structure, with its multi-layered and detachably assembled first mounting plate 330, first injection molding support plate 310, and first extrusion support plate 320, improves the convenience of disassembly and maintenance, and also ensures the stability of the overall structure. Further, as... Figure 5 and 7 As shown, the first injection support plate 310 has a first limiting groove 311 on one side of its surface facing the first extrusion support plate 320; the first branch pipe 342 is snapped into the inner wall of the first limiting groove 311; the other side of the first input pipe 341 is inserted into the first limiting groove 311; the first extrusion support plate 320 has a first mounting hole 322; the first output pipe 343 is inserted into and snapped into the interior of the first mounting hole 322; this ensures the smoothness and stability of the injected raw material and also improves the convenience of disassembly and maintenance. Further, as... Figure 5 and 7 As shown, the first injection support plate 310 has a fifth mounting hole 312 on one side surface facing the first extrusion support plate 320; the first extrusion support plate 320 has a second mounting hole 323 inside; the outer surface of the air guide needle 620 is closely attached to and movably disposed inside the fifth mounting hole 312 and the second mounting hole 323 to ensure its sealing performance; it can also ensure the orderly up and down movement.

[0037] Specifically, in some implementations, such as Figure 1 and 2As shown, the lower mold body 400 includes a second mounting plate 430, a second injection support plate 410, and a second extrusion support plate 420 that are detachably connected as a single unit along the height direction; the second mounting plate 430 is fixedly connected to the frame 100; the second material injection assembly 440 is disposed between the second injection support plate 410 and the second extrusion support plate 420; the bubble treatment mechanism 600 (middle air guide pin 620) passes through the second mounting plate 430, the second injection support plate 410, and the second extrusion support plate 420 respectively. In some embodiments, the second mounting plate 430 and the second injection support plate 410 are detachably connected as a single unit by a third bolt; the second injection support plate 410 and the second extrusion support plate 420 are detachably connected as a single unit by a fourth bolt; and both ends of the third and fourth bolts are sealed by sealing plugs or other components. This structure, through its multi-layered and detachable assembly of a second mounting plate 430, a second injection-molded support plate 410, and a second extrusion support plate 420, improves the ease of disassembly and maintenance while ensuring the overall structural stability. Furthermore, as... Figure 5 and 8 As shown, the second injection support plate 410 has a second limiting groove 411 on one side of its surface facing the second extrusion support plate 420; the second branch pipe 442 is snapped into the inner wall of the second limiting groove 411; the other side of the second input pipe 441 is inserted into the second limiting groove 411; the second extrusion support plate 420 has a third mounting hole 422; the second input pipe 441 is inserted into and snapped into the interior of the third mounting hole 422; this ensures the smoothness and stability of the injected raw material and also improves the convenience of disassembly and maintenance. Further, as... Figure 5 and 8 As shown, the second injection support plate 410 has a sixth mounting hole 412 on one side surface facing the second extrusion support plate 420; the second extrusion support plate 420 has a fourth mounting hole 423 inside; the outer surface of the air guide needle 620 is closely attached to and movably disposed inside the sixth mounting hole 412 and the fourth mounting hole 423 to ensure its sealing performance; it can also ensure the orderly up and down movement.

[0038] Specifically, in some implementations, such as Figure 1 and 5 As shown, the outer end of the air-guiding needle 620 is provided with a sealing traction assembly 630; the sealing traction assembly 630 is disposed in the first mounting groove 324 of the upper mold body 300 (the first extrusion support plate 320); and / or the sealing traction assembly 630 is disposed in the second mounting groove 424 of the lower mold body 400 (the second extrusion support plate 420); to ensure the stability and smoothness of the up-and-down driving of the air-guiding needle 620. In some embodiments, such as... Figure 5 and 6 As shown, the first mounting groove 324 is connected to the second mounting hole 323; the second mounting groove 424 is connected to the fourth mounting hole 423; and the number of the sealing traction components 630 is four, which are symmetrically arranged around the outer surface of the air guide needle 620; the sealing traction component 630 includes a traction spring 631, an inclined connecting block 632, a sealing support plate 633, and a mounting block 634; one end of the air guide needle 620 is close to and moves through the sealing support plate 633; ​​one end of the inclined connecting block 632 is connected to the outer surface of the air guide needle 620; the other end of the inclined connecting block 632 is connected to one end of the traction spring 631; the other end of the traction spring 631 is connected to the mounting block 634; the mounting block 634 is connected to the sealing support plate 633; ​​and the sealing support plate 633 is disposed inside the first mounting groove 324 or the second mounting groove 424. During use, as the air-guided puncture needle 620 is pushed downwards, the inclined connecting block 632 acts by squeezing and swinging along one side of the traction spring 631 to effectively buffer the speed of advancement, thereby avoiding excessive puncturing of the injection-molded product.

[0039] Specifically, in some implementations, such as Figure 1 and 2 As shown, the temperature regulating mechanism 500 includes a staggered heating molding component 510 and a cooling molding component 520. This structure, through the staggered heating molding component 510 and cooling molding component 520, regulates the heat of the upper and lower mold bodies, thereby achieving rapid and orderly molding and cooling separation of the injection molded material. In some embodiments, such as... Figure 2 and 9 As shown, the heating and forming component 510 includes a curved or irregularly shaped heating tube 511; the heating tube 511 is connected to the interior of the lower mold body 400 (the second mounting plate 430). Further, as... Figure 9 As shown, the second mounting plate 430 has a fourth limiting groove 433 on the side surface facing the second injection molding support plate 410; the heating tube 511 is snapped into the inner wall of the fourth limiting groove 433. Wherein, as Figure 2 and 9As shown, the cooling and molding component 520 includes a heat exchange input pipe 521, a heat exchange output pipe 522, and a heat exchange circulation pipe 523; the heat exchange circulation pipe 523 is connected to the interior of the lower mold body 400 (the second mounting plate 430); the output end of the heat exchange input pipe 521 is connected to one end of the heat exchange circulation pipe 523; the input end of the heat exchange output pipe 522 is connected to the other end of the heat exchange circulation pipe 523; the input end of the heat exchange input pipe 521 is connected to a liquid pump; the liquid pump is connected to a coolant storage tank; the output end of the heat exchange output pipe 522 is connected to a circulation tank.

[0040] The present invention also proposes an injection molding method for automotive trim panels, wherein the following steps are performed based on the above-mentioned injection molding apparatus for automotive trim panels: S1. Start the extrusion drive component 200 to drive the upper mold 300 toward the lower mold 400, thereby forming the molding cavity 101; S2. A first preset amount of polypropylene raw material is conveyed into the molding cavity 101 for a first preset time inside the mold body 300 to form a first base layer at the bottom of the molding cavity 101; thereby obtaining an injection molded product with stronger stability in both inner and outer layers. The selection of the first preset duration depends on the content of the first base layer required in the actual application process, and will not be limited here. S3. Continue to feed the amount of polypropylene raw material for a second preset time into the molding cavity 101 into the interior of the upper mold 300, and at the same time feed the amount of PU (polyurethane) raw material for a second preset time into the molding cavity 101 into the interior of the lower mold 400 to form an injection-molded mixture; wherein, the second preset time is 1min-2min. S4. Perform a third preset heating treatment on the upper mold body 300 and the lower mold body 400 for at least 80 seconds. S5. The bubble handling mechanism 600 of the upper mold body 300 and the bubble handling mechanism 600 of the lower mold body 400 perform a preset number of up-and-down traction movements on the upper and lower surfaces of the injection-molded mixture to achieve the processing operation. S6. Cool the upper mold 300 and the lower mold 400 for a fourth preset duration to obtain the automotive trim panel; wherein, the fourth preset duration is 45-60s.

[0041] The specific structure of the injection molding device for the automotive trim panel is as described in the above embodiments. Since the injection molding method for this automotive trim panel adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated here.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0043] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments described above, and any obvious improvements, substitutions, or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. An injection molding device for automotive trim panels, characterized in that: It includes a frame, extrusion drive components, upper die body, lower die body, temperature control mechanism, and bubble treatment mechanism; The upper mold body and the lower mold body are connected side by side to the frame; and a forming cavity is provided between the upper mold body and the lower mold body; the extrusion drive component is connected to the frame and to the upper mold body; the temperature adjustment mechanism is connected to the interior of the upper mold body and / or the lower mold body; the number of bubble treatment mechanisms is at least one, and the mounting end of the bubble treatment mechanism is connected to the upper mold body and / or the lower mold body; the processing end of the bubble treatment mechanism extends movably into the interior of the forming cavity.

2. The injection molding device for automotive trim panels according to claim 1, characterized in that: The extrusion drive component includes an extrusion lifting cylinder; the extrusion lifting cylinder is connected to the top of the frame and to the upper mold body.

3. The injection molding device for automotive trim panels according to claim 1, characterized in that: The bubble treatment mechanism includes a height adjustment component and at least one air guide needle; The mounting end of the height adjustment component is connected to the side of the upper mold body away from the molding cavity; the movable end of the height adjustment component is connected to one side of the corresponding air guide pin; the other side of the air guide pin passes through the upper mold body and extends into the molding cavity. And / or the mounting end of the height adjustment component is connected to the side of the lower mold body away from the molding cavity; the movable end of the height adjustment component is connected to one side of the corresponding air guide pin; the other side of the air guide pin passes through the lower mold body and extends into the molding cavity.

4. The injection molding device for automotive trim panels according to claim 3, characterized in that: The height adjustment component includes a height adjustment cylinder, a connecting plate, an assembly plate, and at least one support column; one end of the support column is connected to the lower mold body or the upper mold body; the bottom of the connecting plate is connected to the other end of the support column; the mounting end of the height adjustment cylinder is connected to the connecting plate; the movable end of the height adjustment cylinder is connected to the assembly plate; one end of all the air guide pins is engaged inside the assembly plate.

5. The injection molding device for automotive trim panels according to claim 3, characterized in that: The air-guiding needle is provided with an air-guiding channel, which extends through the height of the air-guiding needle; and the two ends of the air-guiding channel are respectively connected to the molding cavity and the outside of the air-guiding needle.

6. The injection molding device for automotive trim panels according to claim 1, characterized in that: The upper mold body has a first molding groove on one side surface facing the lower mold body; the upper mold body has a first material injection component; one end of the first material injection component is connected to the first molding groove; the lower mold body has a second molding groove on one side surface facing the upper mold body; the lower mold body has a second material injection component; one end of the second material injection component is connected to the second molding groove; and the molding cavity is formed between the second molding groove and the first molding groove.

7. The injection molding apparatus for automotive trim panels according to claim 6, characterized in that: The first material injection assembly includes a first input pipe, a first branch pipe, and a first output pipe; the other end of the first input pipe is connected to one end of the first branch pipe; the first branch pipe is connected to the interior of the upper mold body; The other end of the first branch pipe is connected to one end of the first output pipe; the other end of the first output pipe extends to the first molding groove and is connected to the molding cavity. And / or, the second material injection assembly includes a second input pipe, a second branch pipe, and a second output pipe; the other end of the second input pipe is connected to one end of the second branch pipe; the second branch pipe is connected to the interior of the lower mold body; The other end of the second branch pipe is connected to one end of the second output pipe; the other end of the second output pipe extends to the second molding groove and is connected to the molding cavity.

8. The injection molding device for automotive trim panels according to claim 1, characterized in that: The temperature regulating mechanism includes a heating forming component and a cooling forming component; the heating end of the heating forming component and the cooling end of the cooling forming component are offset.

9. The injection molding device for automotive trim panels according to claim 8, characterized in that: The heating and forming component includes a curved or irregularly shaped heating tube; the heating tube is connected to the interior of the lower mold body; And / or, the cooling forming component includes a heat exchange input pipe, a heat exchange output pipe, and a heat exchange circulation pipe; the heat exchange circulation pipe is connected to the interior of the lower mold body; the output end of the heat exchange input pipe is connected to one end of the heat exchange circulation pipe; the input end of the heat exchange output pipe is connected to the other end of the heat exchange circulation pipe.

10. A method for injection molding automotive trim panels, characterized in that: The following steps are performed using the injection molding apparatus for automotive trim panels according to any one of claims 1 to 9: S1. Start the extrusion drive component to drive the upper mold body toward the lower mold body, thereby forming a molding cavity; S2. A first preset time amount of polypropylene raw material is conveyed into the molding cavity to form a first base layer at the bottom of the molding cavity. S3. Continue to feed the amount of polypropylene raw material for the second preset time into the molding cavity into the upper mold body, and at the same time feed the amount of polyurethane raw material for the second preset time into the molding cavity into the lower mold body to form an injection-molded mixture. S4. Perform a third preset heating treatment on the upper mold body and the lower mold body; S5, the bubble handling mechanism for the upper mold body and the bubble handling mechanism for the lower mold body; S6. Perform a cooling process on the upper and lower mold bodies for a fourth preset duration to obtain the automotive trim panel.

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