Injection mold for hard air inlet pipe of automobile engine

Abstract

The utility model relates to an injection mold for an air inlet hard pipe of an automobile engine, which comprises a movable mold assembly and a fixed mold assembly which are matched with each other and are respectively arranged front and back, and the movable mold assembly comprises a movable module, a movable core block embedded in the rear side of the movable module, a feeding block fixed on the front side of the movable module and a panel fixed on the front side of the feeding block; the fixed mold assembly comprises a fixed mold block matched with the movable mold block, a fixed core block embedded in the front side of the fixed mold block and matched with the movable core block, a seat block arranged behind the fixed core block, and an ejection mechanism arranged between the seat block and the fixed core block; a first inner core forming module and a second inner core forming module which are matched with each other are arranged between the movable module and the fixed module; according to the injection mold, the demolding difficulty is reduced, and the structural complexity of the injection mold is reduced, so that the manufacturing and assembling processes are simplified.

Description

Technical Field

[0001] The utility model relates to an injection mould for an air intake hard pipe of an automobile engine. Background Art

[0002] Air is necessary for the combustion of fuel in a car engine, and the outside air enters the car engine through the intake pipe. In order to ensure that the air flow area remains unchanged and the smoothness of the inner wall of the pipe is ensured to reduce resistance, the current car intake pipes are all made of hard plastic parts, so they are also called car intake hard pipes.

[0003] Since the openings at both ends of the automobile air intake rigid pipe need to be detachably fixed with the corresponding interfaces, and the fixing methods of the openings at both ends are different, one is a bayonet and the other is a threaded opening, in addition, the openings at both ends of the automobile air intake rigid pipe are not on the same straight line, so there is a turning area on the automobile air intake rigid pipe; the existing air intake rigid pipe injection mold uses a single inner core to form the above-mentioned turning area, but demolding is difficult and a steering mechanism must be installed on the inner core to achieve it, which increases the structural complexity of the injection mold, resulting in the mold manufacturing and assembly process are relatively cumbersome, and further improvement is needed. Utility Model Content

[0004] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the utility model is to provide an injection mold for an automobile engine air intake hard pipe which reduces the demoulding difficulty and the structural complexity to simplify the manufacturing and assembly process.

[0005] The technical solution adopted by the utility model to solve the above technical problems is: an injection mold for an automobile engine air intake hard pipe, comprising a movable mold assembly and a fixed mold assembly that cooperate with each other and are respectively arranged front and back, the movable mold assembly comprises a movable module, a movable core block embedded in the rear side of the movable module, a feed block fixed to the front side of the movable module, and a panel fixed to the front side of the feed block; the fixed mold assembly comprises a fixed module that cooperates with the movable module, a fixed core block embedded in the front side of the fixed module and cooperates with the movable core block, a seat block arranged behind the fixed core block, and an ejection mechanism arranged between the seat block and the fixed core block, characterized in that:

[0006] A vertically distributed first half-lumen is provided on the end surface of the moving core block, and correspondingly, a second half-lumen which can be combined with the first half-lumen is provided on the end surface of the fixed core block;

[0007] The upper end opening of the first half tube cavity is upwardly formed with a first half tube clamping cavity, and correspondingly, the upper end opening of the second half tube cavity is upwardly formed with a second half tube clamping cavity which can be assembled with the first half tube clamping cavity;

[0008] A first half-tube turning cavity is formed at the lower left opening of the first half-tube cavity, and correspondingly, a second half-tube turning cavity which can be combined with the first half-tube turning cavity is formed at the lower left opening of the second half-tube cavity;

[0009] A first half-tube internal thread cavity is formed at the lower left end of the opening of the first half-tube turning cavity, and correspondingly, a second half-tube internal thread cavity is formed at the lower left end of the opening of the second half-tube turning cavity, which can be assembled with the first half-tube internal thread cavity;

[0010] A first inner core forming module and a second inner core forming module are provided between the movable module and the fixed module, wherein the first inner core forming module comprises a first positioning slider movably connected to the front side of the fixed module to have the function of vertical movement up and down and located above the second half-tube clamping cavity, a bayonet column fixed to the lower side of the first positioning slider and cooperating with the first half-tube clamping cavity and the second half-tube clamping cavity, and a first inner core column fixed to the end of the bayonet column and cooperating with the first half-tube cavity and the second half-tube cavity;

[0011] The second inner core forming module comprises a second positioning slider movably connected to the front side of the fixed module so as to have the function of tilting and linearly moving toward the second half-tube steering cavity and located at the lower left of the second half-tube steering cavity, and a second inner core column obliquely fixed on the second positioning slider close to one side of the second half-tube steering cavity and cooperating with the first half-tube internal thread cavity and the second half-tube internal thread cavity;

[0012] A first steering column that cooperates with both the first half-tube steering cavity and the second half-tube steering cavity is formed toward the lower left at the end of the first inner core column. Correspondingly, a second steering column that cooperates with both the first half-tube steering cavity and the second half-tube steering cavity is formed toward the upper right at the end of the second inner core column. The end of the first steering column cooperates with the end of the second steering column.

[0013] Preferably, a first lateral forming module is also provided between the movable module and the fixed module, the first lateral forming module comprising a third positioning slider movably connected to the front side of the fixed module to have a left-right translation function and located on the left side of the second semi-tube cavity, a first traction column obliquely inserted in the third positioning slider, and a first trapezoidal limit block laterally fixed on the right side of the third positioning slider, the front end of the first traction column being fixed on the movable module.

[0014] Preferably, a first trapezoidal limiting groove is provided on the left inner wall of the first half-tube cavity, and correspondingly, a second trapezoidal limiting groove which can be spliced ​​with the first trapezoidal limiting groove is provided on the left inner wall of the second half-tube cavity, and the front and rear parts of the first trapezoidal limiting block respectively cooperate with the first trapezoidal limiting groove and the second trapezoidal limiting groove.

[0015] Preferably, a second lateral forming module is further provided between the movable module and the fixed module, the second lateral forming module comprising a fourth positioning slider movably connected to the front side of the fixed module to have a left-right translation function and located on the right side of the second semi-tube cavity, a second traction column obliquely inserted in the fourth positioning slider, and a second trapezoidal limit block laterally fixed on the left side of the fourth positioning slider, the front end of the second traction column being fixed on the movable module.

[0016] Preferably, a third trapezoidal limiting groove is provided on the right inner wall of the first half-tube cavity, and correspondingly, a fourth trapezoidal limiting groove which can be spliced ​​with the third trapezoidal limiting groove is provided on the right inner wall of the second half-tube cavity, and the front and rear parts of the second trapezoidal limiting block respectively cooperate with the third trapezoidal limiting groove and the fourth trapezoidal limiting groove.

[0017] Preferably, a lateral cavity located above the second trapezoidal limiting groove is provided on the end surface of the fixed core block, the lower right inner wall of the lateral cavity is connected to the left inner wall of the second half tube cavity, and an auxiliary molding block is also embedded in the lateral cavity.

[0018] Preferably, a pyramid cavity is formed at the end of the first steering column, and correspondingly, a pyramid block that cooperates with the pyramid cavity is formed outwardly at the end of the second steering column.

[0019] Preferably, an arc surface is formed at the end of the first trapezoidal limit block, and a first guide strip and a second guide strip are respectively formed outwardly on the front and rear outer walls of the first trapezoidal limit block. Correspondingly, a first guide strip that cooperates with the first guide strip is provided on the bottom surface of the first trapezoidal limit groove, and a second guide strip that cooperates with the second guide strip is provided on the bottom surface of the second trapezoidal limit groove.

[0020] Preferably, a U-shaped guide strip and a V-shaped guide strip are respectively formed outwardly on the front and rear outer walls of the second trapezoidal limit block. Correspondingly, a U-shaped guide strip that cooperates with the U-shaped guide strip is provided on the bottom surface of the third trapezoidal limit groove, and a V-shaped guide strip that cooperates with the V-shaped guide strip is provided on the bottom surface of the fourth trapezoidal limit groove.

[0021] Preferably, a laterally distributed forming column and two forming rods are also embedded in the V-shaped guide strip, and the ends of the forming column and the two forming rods extend outwardly from the left end of the V-shaped guide strip.

[0022] Compared with the prior art, the utility model has the advantages that: the utility model splits the original single inner core into a first inner core column and a second inner core column, and the first inner core column and the second inner core column can move independently and cooperate with each other to smoothly and conveniently form a turning area on the air intake hard pipe, thereby reducing the demolding difficulty and reducing the structural complexity of the injection mold to simplify the manufacturing and assembly process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is the exploded structural diagram of the right front side of the utility model;

[0024] Figure 2 It is a left front exploded structural diagram of the fixed core block, the first inner core forming module, the second inner core forming module, the first lateral forming module and the second lateral forming module of the utility model;

[0025] Figure 3 This is a right rear structural diagram of the moving core block of the utility model;

[0026] Figure 4 It is a right front structural diagram of the auxiliary forming block of the utility model. DETAILED DESCRIPTION

[0027] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0029] like Figures 1 to 4 As shown, an injection mold for an automobile engine intake hard pipe includes a movable mold component 1 and a fixed mold component 2 which cooperate with each other and are respectively arranged front and back. The movable mold component 1 includes a movable mold block 11, a movable core block 12 embedded in the rear side of the movable mold block 11, a feed block 13 fixed to the front side of the movable mold block 11, and a panel 14 fixed to the front side of the feed block 13; the fixed mold component 2 includes a fixed mold block 21 which cooperates with the movable mold block 11, a fixed core block 22 which is embedded in the front side of the fixed mold block 21 and cooperates with the movable core block 12, a seat block 23 arranged behind the fixed core block 22, and an ejection mechanism 24 arranged between the seat block 23 and the fixed core block 22.

[0030] A vertically distributed first half-lumen 121 is provided on the end surface of the moving core block 12, and correspondingly, a second half-lumen 221 which can be assembled with the first half-lumen 121 is provided on the end surface of the fixed core block 22;

[0031] The first half tube cavity 121 has a first half tube clamping cavity 122 formed upwardly at the upper end opening, and correspondingly, the second half tube cavity 221 has a second half tube clamping cavity 222 formed upwardly at the upper end opening that can be assembled with the first half tube clamping cavity 122;

[0032] A first half-tube turning cavity 123 is formed at the lower left opening of the first half-tube cavity 121, and correspondingly, a second half-tube turning cavity 223 which can be combined with the first half-tube turning cavity 123 is formed at the lower left opening of the second half-tube cavity 221;

[0033] A first half-tube internal thread cavity 124 is formed at the lower left end of the opening of the first half-tube turning cavity 123. Correspondingly, a second half-tube internal thread cavity 224 that can be assembled with the first half-tube internal thread cavity 124 is formed at the lower left end of the opening of the second half-tube turning cavity 223.

[0034] A first inner core forming module 3 and a second inner core forming module 4 are provided between the movable module 11 and the fixed module 21, wherein the first inner core forming module 3 comprises a first positioning slide block 31 movably connected to the front side of the fixed module 21 to have the function of vertical movement up and down and located above the second half-tube clamping cavity 222, a bayonet column 32 fixed to the lower side of the first positioning slide block 31 and mutually matched with the first half-tube clamping cavity 122 and the second half-tube clamping cavity 222, and a first inner core column 33 fixed to the end of the bayonet column 32 and mutually matched with the first half-tube cavity 121 and the second half-tube cavity 221;

[0035] The second inner core forming module 4 comprises a second positioning slider 41 movably connected to the front side of the fixed module 21 so as to have the function of tilting and linearly moving toward the second half-tube steering cavity 223 and located at the lower left of the second half-tube steering cavity 223, and a second inner core column 42 obliquely fixed on the second positioning slider 41 near one side of the second half-tube steering cavity 223 and cooperating with the first half-tube internal thread cavity 124 and the second half-tube internal thread cavity 224;

[0036] A first steering column 331 is formed at the lower left end of the first inner core column 33 and cooperates with both the first half-tube steering cavity 123 and the second half-tube steering cavity 223. Correspondingly, a second steering column 421 is formed at the upper right end of the second inner core column 42 and cooperates with both the first half-tube steering cavity 123 and the second half-tube steering cavity 223. The end of the first steering column 331 cooperates with the end of the second steering column 421.

[0037] A first lateral forming module 5 is also provided between the moving module 11 and the fixed module 21. The first lateral forming module 5 includes a third positioning slider 51 movably connected to the front side of the fixed module 21 to have a left-right translation function and located on the left side of the second semi-tube cavity 221, a first traction column 52 obliquely inserted in the third positioning slider 51, and a first trapezoidal limit block 53 laterally fixed on the right side of the third positioning slider 51. The front end of the first traction column 52 is fixed on the moving module 11.

[0038] A first trapezoidal limiting groove 125 is provided on the left inner wall of the first semi-tube cavity 121, and correspondingly, a second trapezoidal limiting groove 225 which can be assembled with the first trapezoidal limiting groove 125 is provided on the left inner wall of the second semi-tube cavity 221, and the front and rear parts of the first trapezoidal limiting block 53 respectively cooperate with the first trapezoidal limiting groove 125 and the second trapezoidal limiting groove 225.

[0039] A second lateral forming module 6 is also provided between the moving module 11 and the fixed module 21. The second lateral forming module 6 includes a fourth positioning slider 61 movably connected to the front side of the fixed module 21 to have a left-right translation function and located on the right side of the second semi-tube cavity 221, a second traction column 62 obliquely inserted in the fourth positioning slider 61, and a second trapezoidal limit block 63 laterally fixed on the left side of the fourth positioning slider 61. The front end of the second traction column 62 is fixed on the moving module 11.

[0040] A third trapezoidal limiting groove 126 is provided on the right inner wall of the first half tube cavity 121, and correspondingly, a fourth trapezoidal limiting groove 226 which can be spliced ​​with the third trapezoidal limiting groove 126 is provided on the right inner wall of the second half tube cavity 221, and the front and rear parts of the second trapezoidal limiting block 63 respectively cooperate with the third trapezoidal limiting groove 126 and the fourth trapezoidal limiting groove 226.

[0041] A lateral cavity 229 located above the second trapezoidal limiting groove 225 is provided on the end surface of the fixed core block 22. The lower right inner wall of the lateral cavity 229 is connected to the left inner wall of the second half tube cavity 221. An auxiliary molding block 7 is also embedded in the lateral cavity 229.

[0042] A plurality of first dividing blocks 2210 are formed on the lower right inner wall of the lateral cavity 229 and are arranged in sequence from top to bottom. Correspondingly, a shaping notch 71 is provided at the right rear corner of the auxiliary molding block 7, a second dividing block 72 is formed on the bottom wall of the shaping notch 71 to the right, and a molding notch groove 73 is provided on the upper right edge of the auxiliary molding block 7.

[0043] A pyramid cavity 332 is formed at the end of the first steering column 331 , and correspondingly, a pyramid block 422 that cooperates with the pyramid cavity 332 is formed outwardly at the end of the second steering column 421 .

[0044] An arc surface 531 is formed at the end of the first trapezoidal limit block 53, and a first guide bar 532 and a second guide bar 533 are respectively formed outwardly on the front and rear outer walls of the first trapezoidal limit block 53. Correspondingly, a first guide groove 127 that cooperates with the first guide bar 532 is formed on the bottom surface of the first trapezoidal limit groove 125, and a second guide groove 227 that cooperates with the second guide bar 533 is formed on the bottom surface of the second trapezoidal limit groove 225.

[0045] A U-shaped guide strip 631 and a V-shaped guide strip 634 are respectively formed on the front and rear outer walls of the second trapezoidal limiting block 63. Correspondingly, a U-shaped guide strip 128 that cooperates with the U-shaped guide strip 631 is provided on the bottom surface of the third trapezoidal limiting groove 126, and a V-shaped guide strip 228 that cooperates with the V-shaped guide strip 634 is provided on the bottom surface of the fourth trapezoidal limiting groove 226.

[0046] A laterally distributed forming column 64 and two forming rods 65 are also embedded in the V-shaped guide strip 634 . The ends of the forming column 64 and the two forming rods 65 extend outward from the left end of the V-shaped guide strip 634 .

[0047] A molding protrusion 632 is formed outwardly at the left end of the U-shaped guide strip 631 , a molding cavity 635 is formed at the end of the molding protrusion 632 , and a plurality of circumferentially distributed molding grooves 633 are formed between the inner wall of the molding cavity 635 and the outer wall of the molding protrusion 632 .

[0048] Working principle:

[0049] The panel 14 in the movable mold assembly 1 and the seat block 23 in the fixed mold assembly 2 are respectively installed on the action mechanism and the body of the injection molding machine; the panel 14 is driven to move backward with the help of the action mechanism, and then the movable module 11 is driven to move toward the fixed module 21 with the help of the feed block 13 until the two are assembled with each other, so that the first half-tube cavity 121 on the movable core block 12 and the second half-tube cavity 221 on the fixed core block 22 are assembled with each other into a tubular shape, and the first half-tube clamping cavity 122 and the second half-tube clamping cavity 222, the first half-tube steering cavity 123 and the second half-tube steering cavity 223, and the first half-tube internal thread cavity 124 and the second half-tube internal thread cavity 224 are also assembled with each other (prior art).

[0050] When the moving module 11 moves backward, it will drive the first traction column 52 in the first lateral molding module 5 to move synchronously, thereby forcing the third positioning slider 51 to move toward the direction of the second semi-tube cavity 221, so that the first guide bar 532 and the second guide bar 533 on the first trapezoidal limiting block 53 slide along the first guide groove 127 and the second guide groove 227 respectively, until the upper and lower outer walls of the first trapezoidal limiting block 53 are respectively fitted with the upper and lower inner walls of the first trapezoidal limiting groove 125 and the upper and lower inner walls of the second trapezoidal limiting groove 225, and the arc surface 5 on the first trapezoidal limiting block 53 is respectively fitted with the upper and lower inner walls of the first trapezoidal limiting groove 125 and the upper and lower inner walls of the second trapezoidal limiting groove 225. 31 will be connected with the inner walls of the first half of the tube cavity 121 and the second half of the tube cavity 221; at the same time, the second traction column 62 in the second lateral forming module 6 will also drive the fourth positioning slider 61 to move toward the second half of the tube cavity 221 in the same way, thereby making the U-shaped guide bar 631 and the V-shaped guide bar 634 on the second trapezoidal limit block 63 slide along the U-shaped guide groove 128 and the V-shaped guide groove 228 respectively, until the upper and lower outer walls of the second trapezoidal limit block 63 are respectively fitted with the upper and lower inner walls of the third trapezoidal limit groove 126 and the upper and lower inner walls of the fourth trapezoidal limit groove 226.

[0051] A cylinder is fixed on the upper side and the left side of the fixed module 21, the telescopic end of the upper cylinder is vertically arranged downward and fixed on the first positioning slider 31 in the first inner core molding module 3, and the telescopic end of the left cylinder is inclined to the upper left and fixed on the second positioning slider 41 in the second inner core molding module 4 and is parallel to the moving direction of the second positioning slider 41; after the first half-tube cavity 121 on the moving core block 12 and the second half-tube cavity 221 on the fixed core block 22 are spliced ​​with each other, the telescopic end of the upper cylinder is driven to extend outward to drive the bayonet column 32 and the first inner core column 33 to move downward with the help of the first positioning slider 31 in the first inner core molding module 3, until the bayonet column 32 extends into the first half-tube clamping cavity 122 and the second half-tube clamping cavity 222 , and the first inner core column 33 extends between the first half-tube cavity 121 and the second half-tube cavity 221; at the same time, the telescopic end of a cylinder on the left is driven to extend outward to drive the second inner core column 42 to move linearly toward the second half-tube steering cavity 223 with the help of the second positioning slider 41 in the second inner core molding module 4, until the second inner core column 42 extends between the first half-tube internal thread cavity 124 and the second half-tube internal thread cavity 224, and the second steering column 421 on the second inner core column 42 extends into the first half-tube steering cavity 123 and the second half-tube steering cavity 223 and abuts against the end of the first steering column 331, and the pyramid block 422 located at the end of the second steering column 421 is just embedded in the pyramid cavity 332 located at the end of the first steering column 331 to ensure accurate alignment.

[0052] Afterwards, the molten material enters between the first half-tube cavity 121 and the second half-tube cavity 221 through the gates provided in the feed block 13 and the moving module 11 and the runner provided in the moving core block 12 and wraps around the bayonet column 32, the first inner core column 33 and the second inner core column 42. After cooling, an air intake hard tube is formed; then, the panel 14 and the feed block 13 are driven forward by the action mechanism to drive the moving module 11 to leave the fixed module 21, and then the formed air intake hard tube is ejected forward by the ejection mechanism 24 (existing technology); in the process of moving forward, the moving core block 12 will similarly drive the third positioning slider 51 and the fourth positioning slider 61 to reset respectively with the help of the first traction column 52 and the second traction column 62.

[0053] The utility model splits the original single inner core into a first inner core column 33 and a second inner core column 42. The first inner core column 33 and the second inner core column 42 can move independently and cooperate with each other to smoothly and conveniently form a turning area on the air intake hard pipe, thereby reducing the demolding difficulty and the structural complexity of the injection mold to simplify the manufacturing and assembly process.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An injection mold for an automobile engine intake hard pipe, comprising a movable mold assembly and a fixed mold assembly which cooperate with each other and are respectively arranged front and back, the movable mold assembly comprising a movable die block, a movable core block embedded in the rear side of the movable die block, a feed block fixed to the front side of the movable die block, and a panel fixed to the front side of the feed block; the fixed mold assembly comprises a fixed die block which cooperates with the movable die block, a fixed core block which is embedded in the front side of the fixed die block and cooperates with the movable core block, a seat block arranged behind the fixed core block, and an ejection mechanism arranged between the seat block and the fixed core block, characterized in that: A vertically distributed first half-lumen is provided on the end surface of the moving core block, and correspondingly, a second half-lumen which can be combined with the first half-lumen is provided on the end surface of the fixed core block; The upper end opening of the first half tube cavity is upwardly formed with a first half tube clamping cavity, and correspondingly, the upper end opening of the second half tube cavity is upwardly formed with a second half tube clamping cavity which can be assembled with the first half tube clamping cavity; A first half-tube turning cavity is formed at the lower left opening of the first half-tube cavity, and correspondingly, a second half-tube turning cavity which can be combined with the first half-tube turning cavity is formed at the lower left opening of the second half-tube cavity; A first half-tube internal thread cavity is formed at the lower left end of the opening of the first half-tube turning cavity, and correspondingly, a second half-tube internal thread cavity is formed at the lower left end of the opening of the second half-tube turning cavity, which can be assembled with the first half-tube internal thread cavity; A first inner core forming module and a second inner core forming module are provided between the movable module and the fixed module, wherein the first inner core forming module comprises a first positioning slider movably connected to the front side of the fixed module to have the function of vertical movement up and down and located above the second half-tube clamping cavity, a bayonet column fixed to the lower side of the first positioning slider and cooperating with the first half-tube clamping cavity and the second half-tube clamping cavity, and a first inner core column fixed to the end of the bayonet column and cooperating with the first half-tube cavity and the second half-tube cavity; The second inner core forming module comprises a second positioning slider movably connected to the front side of the fixed module so as to have the function of tilting and linearly moving toward the second half-tube steering cavity and located at the lower left of the second half-tube steering cavity, and a second inner core column obliquely fixed on the second positioning slider close to one side of the second half-tube steering cavity and cooperating with the first half-tube internal thread cavity and the second half-tube internal thread cavity; A first steering column that cooperates with both the first half-tube steering cavity and the second half-tube steering cavity is formed toward the lower left at the end of the first inner core column. Correspondingly, a second steering column that cooperates with both the first half-tube steering cavity and the second half-tube steering cavity is formed toward the upper right at the end of the second inner core column. The end of the first steering column cooperates with the end of the second steering column.

2. The injection mold for an automobile engine air intake hard pipe according to claim 1, characterized in that: A first lateral forming module is also provided between the moving module and the fixed module. The first lateral forming module includes a third positioning slider movably connected to the front side of the fixed module to have a left-right translation function and located on the left side of the second semi-tube cavity, a first traction column obliquely inserted in the third positioning slider, and a first trapezoidal limit block laterally fixed on the right side of the third positioning slider, and the front end of the first traction column is fixed on the moving module.

3. The injection mold for the automobile engine air intake hard pipe according to claim 2, characterized in that: A first trapezoidal limiting groove is provided on the left inner wall of the first half-tube cavity, and correspondingly, a second trapezoidal limiting groove which can be assembled with the first trapezoidal limiting groove is provided on the left inner wall of the second half-tube cavity, and the front and rear parts of the first trapezoidal limiting block respectively cooperate with the first trapezoidal limiting groove and the second trapezoidal limiting groove.

4. The injection mold for an automobile engine air intake hard pipe according to claim 1, characterized in that: A second lateral forming module is also provided between the moving module and the fixed module. The second lateral forming module includes a fourth positioning slider movably connected to the front side of the fixed module to have a left-right translation function and located on the right side of the second semi-tube cavity, a second traction column obliquely inserted in the fourth positioning slider, and a second trapezoidal limit block laterally fixed on the left side of the fourth positioning slider, and the front end of the second traction column is fixed on the moving module.

5. The injection mold for the automobile engine air intake hard pipe according to claim 4, characterized in that: A third trapezoidal limiting groove is provided on the right inner wall of the first half-tube cavity, and correspondingly, a fourth trapezoidal limiting groove which can be spliced ​​with the third trapezoidal limiting groove is provided on the right inner wall of the second half-tube cavity, and the front and rear parts of the second trapezoidal limiting block respectively cooperate with the third trapezoidal limiting groove and the fourth trapezoidal limiting groove.

6. The injection mold for the automobile engine air intake hard pipe according to claim 3, characterized in that: A lateral cavity located above the second trapezoidal limiting groove is formed on the end surface of the fixed core block, the lower right inner wall of the lateral cavity is connected with the left inner wall of the second half tube cavity, and an auxiliary forming block is embedded in the lateral cavity.

7. The injection mold for an automobile engine air intake hard pipe according to claim 1, characterized in that: A pyramid cavity is formed at the end of the first steering column, and correspondingly, a pyramid block that cooperates with the pyramid cavity is formed outwardly at the end of the second steering column.

8. The injection mold for the automobile engine air intake hard pipe according to claim 3, characterized in that: An arc surface is formed at the end of the first trapezoidal limit block, and a first guide strip and a second guide strip are respectively formed outwardly on the front and rear outer walls of the first trapezoidal limit block. Correspondingly, a first guide strip that cooperates with the first guide strip is provided on the bottom surface of the first trapezoidal limit groove, and a second guide strip that cooperates with the second guide strip is provided on the bottom surface of the second trapezoidal limit groove.

9. The injection mold for the automobile engine air intake hard pipe according to claim 5, characterized in that: A U-shaped guide strip and a V-shaped guide strip are respectively formed outwardly on the front and rear outer walls of the second trapezoidal limit block. Correspondingly, a U-shaped guide strip that cooperates with the U-shaped guide strip is provided on the bottom surface of the third trapezoidal limit groove, and a V-shaped guide strip that cooperates with the V-shaped guide strip is provided on the bottom surface of the fourth trapezoidal limit groove.

10. The injection mold for the automobile engine air intake hard pipe according to claim 9, characterized in that: The V-shaped guide strip is also embedded with a transversely distributed forming column and two forming rods, and the ends of the forming column and the two forming rods extend outwardly from the left end of the V-shaped guide strip.

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