Secondary injection mold for automobile parts

Abstract

The invention provides a secondary injection mold for automobile parts, and belongs to the technical field of injection molds. The secondary injection mold for the automobile parts comprises an upper mold plate, a lower mold plate, a cylindrical upper mold core, a lifting block and a lower mold core, rotating shafts which are coaxially arranged are arranged at the two ends of the upper mold core respectively, rotating holes for the rotating shafts to penetrate through are transversely formed in the lifting block, the lifting block slides up and down along the upper mold plate, and an adjusting mechanism for driving the lifting block to ascend is arranged in the lower mold plate. A turnover mechanism for driving the upper mold core to rotate is arranged on the lifting block; an embedding groove for embedding the lower mold core is formed in the lower mold plate; and an arc-shaped primary forming groove and an arc-shaped secondary forming groove are respectively formed in the cylindrical surface of the upper mold core. A hard plastic raw material and a soft rubber raw material are sequentially conveyed into the arc-shaped mold cavity from respective injection molding runners, an outer-layer injection molding part is firstly subjected to injection molding, then the upper mold core is rotated, then an inner-layer soft rubber mat is subjected to injection molding, molding is performed in the same mold, mold closing and mold opening only need to be performed once, the processing time is short, and the production efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds and relates to a secondary injection mold for automobile parts. Background Art

[0002] The car cup holder is a common car product, which is used to place and fix cups or other beverage bottles to prevent liquids from spilling during driving. The existing method of clamping the cup is to clamp the cup circumferentially by a plurality of plastic clamps, and the plastic clamps are pushed to tighten by a spring.

[0003] For example, the invention patent [patent number 202111164784.8] published in China details a vehicle-mounted cup holder structure, which includes a cup holder base, on which the cup holder body is arranged; an air duct seat is snapped on the side of the cup holder base away from the cup holder body, and the air duct seat and the cup holder base form an air duct cavity for communicating with the air outlet of the air conditioner; multiple air flow guiding units are arranged along the circumference of the cup holder body, each air flow guiding unit is provided with a first air duct, the air inlet of the first air duct is connected to the air duct cavity, and the air outlet faces the inside of the cup holder body; and the air outlets of each first air duct are configured together: the wind entering the cup holder body through the air outlet forms a circulation. When a water cup needs to be placed, the water cup is placed in the cup holder body, and the water cup opens the multiple air flow guiding units, that is, the air flow guiding unit rotates, and the limit plate and the outer side of the cup holder body are separated. At this time, the torsion spring provides a force to always stick to the water cup, thereby clamping the water cup, and can rotate adaptively with the size of the water cup.

[0004] There are many products on the market with similar functions to the above-mentioned airflow guide unit, all of which belong to cup clamps, and most of them are made of a single hard plastic. The bumps of the vehicle during driving make it easy for the hard plastic clamp to squeeze the paper cup or soft cup, and the friction is small, and the frequent back and forth movement with the cup surface can easily cause scratches on the cup body. For this reason, a double-layer clamp is designed, with a hard plastic on the outside and a soft plastic on the inner layer in contact with the cup surface. It can not only increase the friction and prevent scratches, but also not easily squeeze the cup surface. Plastic parts made of double-layer materials are made by injection molds. If they are separately injection molded and then assembled, it will not only consume a lot of manpower and material resources, but also increase the use of mechanical equipment due to the numerous processes. For this reason, an injection mold that can complete the manufacturing of this automotive accessory alone is urgently needed. Summary of the invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and to propose a secondary injection mold for automotive accessories, which is provided with a flippable upper mold core with two molding grooves, which can perform primary molding and secondary molding respectively, and inject two materials into an integral clamping part without manual assembly.

[0006] The purpose of the present invention can be achieved through the following technical solutions: a secondary injection mold for automobile parts, comprising an upper mold plate, a lower mold plate, a cylindrical upper mold core, a lifting block and a lower mold core, characterized in that the two ends of the upper mold core are respectively provided with coaxially arranged rotating shafts, the lifting block is horizontally provided with a rotating hole for the rotating shaft to pass through, the lifting block slides up and down along the upper mold plate, the lower mold plate is provided with an adjusting mechanism for driving the lifting block to rise, and the lifting block is provided with a flipping mechanism for driving the upper mold core to rotate; the lower mold plate is provided with an embedding groove for the lower mold core to be embedded, and the cylindrical surface of the upper mold core is respectively provided with an arc-shaped primary The molding groove and the secondary molding groove have several raised arc strips in the primary molding groove, the depth of the secondary molding groove is greater than that of the primary molding groove, and the lower mold core is provided with an arc-shaped mold cavity that can cooperate with both the primary molding groove and the secondary molding groove; a first injection molding flow channel is provided on one of the rotating shafts, and a second injection molding flow channel is provided on the other rotating shaft, a first injection molding needle valve connected to the first injection molding flow channel is embedded in the upper mold core, and a second injection molding needle valve connected to the second injection molding flow channel is also embedded in the upper mold core, the outlet of the first injection molding needle valve is connected to the primary molding groove, and the outlet of the second injection molding needle valve is connected to the secondary molding groove.

[0007] The injection molding machine closes the upper mold plate and the lower mold plate, and the flipping mechanism drives the primary molding groove of the upper mold core toward the arc-shaped mold cavity of the lower mold core, and the plastic raw material is injected into the arc-shaped mold cavity from the first injection molding channel. After the hard raw material is formed, the outer layer injection molded part is made, the adjustment mechanism is started, and the lifting block is lifted upward, the upper mold core is separated from the injection molded part, and the flipping mechanism is started to flip the upper mold core to the state where the secondary molding groove is facing. The adjustment mechanism lowers the lifting block to close the secondary molding groove with the arc-shaped mold cavity, and another plastic raw material is injected into the arc-shaped mold cavity from the second injection molding channel. A layer of soft rubber pad is injection-molded on the outer layer injection molded part, and the mold is opened to take out the entire clamp after cooling and shaping.

[0008] Furthermore, the flipping mechanism includes a flipping motor, a limit motor, an extrusion slider and a slide rail. The flipping motor is fixed on the lifting block on the left, and the limit motor is fixed on the lifting block on the right. The rotating shaft is connected to the output shaft of the flipping motor through a gear set. The output shaft of the limit motor is connected to a screw. The extrusion sliders on both sides are threadedly connected to the same screw. The two ends of the screw are opposite threaded sections. The extrusion slider is embedded in the slide rail and slides horizontally. When the extrusion slider moves forward, it abuts against the lower end surface of the upper template and makes the lifting block abut against the lower template.

[0009] The flip motor drives the shaft to rotate through the gear set to adjust the angle of the upper mold core, and the limit motor drives the extrusion slider forward or backward. When moving forward, it can squeeze the lifting block firmly against the lower mold plate to improve the sealing effect of the molding cavity. The two ends of the screw are reverse thread sections. When the screw rotates, it can drive the two extrusion sliders to move toward or away from each other at the same time.

[0010] Furthermore, the front end of the extrusion slider has an extrusion slope, and the upper end of the extrusion slider has a rubber layer. The rubber layer, the upper end surface of the extrusion slider and the extrusion slope are firmly bonded together by glue, so that the lifting block can be firmly pressed on the lower template, and the extrusion slope facilitates the extrusion slider to slide into the gap between the upper template and the lifting block.

[0011] Furthermore, the upper template has a side slider protruding laterally, the side of the lifting block has a side slide groove, the side slider is inserted into the side slide groove, the upper end of the side slide groove is closed, the upper end of the lifting block has a plurality of vertically arranged guide pillars, and the upper template has guide holes for the guide pillars to be inserted. The side slider is used to pull the lifting block to prevent the lifting block from falling off the upper template, and at the same time cooperates with the limiting function of the guide pillar to make the lifting block move up and down more smoothly.

[0012] Furthermore, a first spring is sleeved on the guide column, the upper end of the first spring abuts against the upper template, and the lower end of the first spring abuts against the upper end surface of the lifting block. Under the action of the first spring, the lifting block descends to the lowest position, so that the side slide block abuts against the upper end of the side slide groove, which facilitates the smooth sliding of the extrusion slide block and prevents the extrusion slide block from being stuck by the upper template.

[0013] Furthermore, the primary molding groove and the secondary molding groove are arranged 180° symmetrically with the axis of the upper mold core as the center line. The upper mold core needs to be rotated 180 degrees to switch the molding groove, avoiding interference between the two molding grooves and improving the sealing effect of the mold cavity.

[0014] Furthermore, the adjusting mechanism includes a cylinder, a unloading plate and a push rod. An installation cavity is opened on the lower template, the unloading plate is located in the installation cavity, the push rod vertically penetrates downward into the installation cavity and is fixedly connected to the unloading plate, the upper end of the push rod abuts against the lifting block, and a through hole connected to the installation cavity is opened at the bottom of the lower template, and the telescopic rod of the cylinder passes through the through hole and abuts against the unloading plate.

[0015] Start the cylinder to push the unloading plate up, lift the lifting block through the push rod, and the push rod goes down. The lifting block moves down naturally due to its own gravity and the force of the first spring.

[0016] Furthermore, a discharge rod is passed through the lower template, the upper end of the discharge rod extends into the embedding groove and is fixedly connected to the lower mold core, the lower end of the discharge rod extends into the installation cavity and has a limit block, and a second spring is sleeved on the discharge rod, the upper end of the second spring abuts against the top wall of the installation cavity, and the lower end of the second spring abuts against the limit block. After the discharge plate rises a certain distance, it can abut against the limit block.

[0017] After the mold is opened, the clamped product is still in the embedded groove, and the unloading plate continues to rise, pushing the unloading rod upward, pushing the lower mold core and the clamped product out of the lower mold plate, and the worker can take it out manually or by a robot. After the unloading plate drops, due to the force of the second spring, the unloading rod drives the lower mold core back to the bottom of the embedded groove.

[0018] Furthermore, the outer end of the first injection molding flow channel is connected to a first material delivery pipe, and the outer end of the second injection molding flow channel is connected to a second material delivery pipe. The two raw materials are respectively injected into the arc-shaped mold cavity from the rotating shafts at both ends without interfering with each other.

[0019] Compared with the prior art, the secondary injection mold of the automotive parts has the following advantages:

[0020] 1. The hard plastic raw materials and soft rubber raw materials are successively conveyed into the arc-shaped mold cavity from their respective injection runners. The outer layer of the injection molded parts is injected first, and then the upper mold core is rotated to inject the inner layer of the soft rubber pad. The molding is carried out in the same mold, and only one mold closing and opening is required. The processing time is short, and there is no need to transfer the injection molded parts to the next injection mold, which greatly improves the production efficiency.

[0021] 2. Since an arc strip is set in the primary molding groove, an arc groove will be formed on the inner side of the outer layer injection molded part. When the inner layer is injected, the soft rubber material fills the arc groove, increasing the contact area of ​​the inner and outer layers, making the two layers more firmly combined and not easy to separate.

[0022] 3. The mold has a simple structure, low manufacturing cost, and a high degree of automation. The mode switching between primary injection and secondary injection is achieved through a flip motor, a limit motor, and a cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional view of the secondary injection mold of the automotive part.

[0024] Figure 2 It is a cross-sectional view of the upper template and lifting block when assembled.

[0025] Figure 3 It is a structural diagram of the lifting block.

[0026] Figure 4 It is a three-dimensional diagram of the upper mold core.

[0027] Figure 5 It is the assembly drawing of the upper mold core and the lower mold core.

[0028] Figure 6 It is a three-dimensional diagram of the lower mold core.

[0029] Figure 7 This is a schematic diagram of the clamping product.

[0030] In the figure, 1, upper mold plate; 101, side slide block; 102, guide hole; 103, first spring; 2, lower mold plate; 201, installation cavity; 3, upper mold core; 31, primary molding groove; 32, secondary molding groove; 33, arc strip; 34, rotating shaft; 35, first injection molding flow channel; 36, second injection molding flow channel; 37, first injection molding needle valve; 38, second injection molding needle valve; 4, lifting block; 41, side slide groove; 42, guide column; 5, lower mold core; 51, arc mold cavity; 6, flip motor; 7, limit motor; 8, extrusion slider; 81, rubber layer; 9, slide rail; 10, gear set; 11, screw; 12, cylinder; 13, unloading plate; 14, ejector; 15, unloading rod; 16, limit block; 17, second spring; 18, first feed pipe; 19, second feed pipe. DETAILED DESCRIPTION

[0031] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0032] like Figure 1 , Figure 2 As shown, the secondary injection mold of the automotive accessory comprises an upper mold plate 1, a lower mold plate 2, a cylindrical upper mold core 3, a lifting block 4 and a lower mold core 5. The two ends of the upper mold core 3 are respectively provided with coaxially arranged rotating shafts 34, and the lifting block 4 is horizontally provided with a rotating hole for the rotating shaft 34 to pass through. The lifting block 4 slides up and down along the upper mold plate 1, and the lower mold plate 2 is provided with an adjusting mechanism for driving the lifting block 4 to rise, and the lifting block 4 is provided with a flipping mechanism for driving the upper mold core 3 to rotate.

[0033] like Figure 5 As shown, the lower mold plate 2 is provided with an embedding groove for the lower mold core 5 to be embedded, the cylindrical surface of the upper mold core 3 is provided with an arc-shaped primary molding groove 31 and a secondary molding groove 32, a plurality of raised arc-shaped strips 33 are provided in the primary molding groove 31, the depth of the secondary molding groove 32 is greater than that of the primary molding groove 31, and the lower mold core 5 is provided with an arc-shaped mold cavity 51 that can cooperate with both the primary molding groove 31 and the secondary molding groove 32. The arc of the primary molding groove 31 and the secondary molding groove 32 are the same, and the arc of the present embodiment is between 60° and 80°.

[0034] A first injection channel 35 is opened on one of the rotating shafts 34, and a second injection channel 36 is opened on the other rotating shaft 34. A first injection needle valve 37 connected to the first injection channel 35 is embedded in the upper mold core 3, and a second injection needle valve 38 connected to the second injection channel 36 is also embedded in the upper mold core 3. The outlet of the first injection needle valve 37 is connected to the primary molding groove 31, and the outlet of the second injection needle valve 38 is connected to the secondary molding groove 32.

[0035] The flipping mechanism includes a flipping motor 6, a limit motor 7, an extrusion slider 8 and a slide rail 9. The flipping motor 6 is fixed on the lifting block 4 on the left, and the limit motor 7 is fixed on the lifting block 4 on the right. The rotating shaft 34 is connected to the output shaft of the flipping motor 6 through a gear set 10. The output shaft of the limit motor 7 is connected to a screw 11. The extrusion sliders 8 on both sides are threadedly connected to the same screw 11. The two ends of the screw 11 are opposite threaded sections. The extrusion slider 8 is embedded in the slide rail 9 and slides horizontally. When the extrusion slider 8 moves forward, it abuts against the lower end surface of the upper template 1 and makes the lifting block 4 abut against the lower template 2.

[0036] The flip motor 6 drives the rotating shaft 34 to rotate through the gear set 10 to adjust the angle of the upper mold core 3, and the limit motor 7 drives the extrusion slide block 8 to move forward or backward. When moving forward, it can squeeze the lifting block 4 firmly against the lower mold plate 2 to improve the sealing effect of the molding cavity. The two ends of the screw 11 are reverse thread sections. When the screw 11 rotates, it can simultaneously drive the two extrusion slide blocks 8 to move toward or away from each other.

[0037] like Figure 3 As shown, the front end of the extrusion slider 8 has an extrusion slope, and the upper end of the extrusion slider 8 has a rubber layer 81. The rubber layer 81 is firmly bonded to the upper end surface and the extrusion slope of the extrusion slider 8 by glue, so that the lifting block 4 can be firmly pressed on the lower template 2, and the extrusion slope facilitates the extrusion slider 8 to slide into the gap between the upper template 1 and the lifting block 4.

[0038] The upper template 1 has a side slide block 101 protruding laterally, and a side slide groove 41 is provided on the side of the lifting block 4. The side slide block 101 is inserted into the side slide groove 41, and the upper end of the side slide groove 41 is closed. The upper end of the lifting block 4 has a plurality of vertically arranged guide posts 42, and the upper template 1 has a guide hole 102 for inserting the guide posts 42. The side slide block 101 is used to pull the lifting block 4 to prevent the lifting block 4 from falling off the upper template 1 downwards, and at the same time cooperates with the limiting function of the guide posts 42 to make the lifting block 4 move up and down more smoothly.

[0039] The guide column 42 is sleeved with a first spring 103, the upper end of the first spring 103 abuts against the upper template 1, and the lower end of the first spring 103 abuts against the upper end surface of the lifting block 4. Under the action of the first spring 103, the lifting block 4 descends to the lowest position, so that the side slide block 101 abuts against the upper end of the side slide groove 41, which facilitates the extrusion slide block 8 to slide smoothly and prevents the extrusion slide block 8 from being stuck by the upper template 1.

[0040] like Figure 4 As shown, the primary molding groove 31 and the secondary molding groove 32 are arranged 180° symmetrically with the axis of the upper mold core 3 as the center line. The upper mold core 3 needs to be rotated 180 degrees to switch the molding groove, so as to avoid interference between the two molding grooves and improve the sealing effect of the mold cavity.

[0041] The adjustment mechanism includes a cylinder 12, a discharge plate 13 and a push rod 14. A mounting cavity 201 is provided on the lower template 2. The discharge plate 13 is located in the mounting cavity 201. The push rod 14 vertically penetrates downward into the mounting cavity 201 and is fixedly connected to the discharge plate 13. The upper end of the push rod 14 abuts against the lifting block 4. A through hole connected to the mounting cavity 201 is provided at the bottom of the lower template 2. The telescopic rod of the cylinder 12 passes through the through hole and abuts against the discharge plate 13. Start the cylinder 12 to push the discharge plate 13 upward, and the lifting block 4 is lifted by the push rod 14. The push rod 14 descends, and the lifting block 4 naturally moves downward due to its own gravity and the force of the first spring 103.

[0042] like Figure 6 As shown, the lower mold plate 2 is provided with a discharge rod 15, the upper end of the discharge rod 15 extends into the embedded groove and is fixedly connected to the lower mold core 5, the lower end of the discharge rod 15 extends into the installation cavity 201 and has a limit block 16, and the discharge rod 15 is sleeved with a second spring 17, the upper end of the second spring 17 abuts against the top wall of the installation cavity 201, and the lower end of the second spring 17 abuts against the limit block 16, and the discharge plate 13 can abut against the limit block 16 after rising a certain distance. After the mold is opened, the clamping product is still located in the embedded groove, and the discharge plate 13 continues to rise, pushing the discharge rod 15 to move up, and the lower mold core 5 and the clamping product are ejected from the lower mold plate 2, and the worker can take them out manually or by a robot. After the discharge plate 13 descends, due to the force of the second spring 17, the discharge rod 15 drives the lower mold core 5 back to the bottom of the embedded groove.

[0043] The first injection channel 35 is connected to the first material delivery pipe 18 at its outer end, and the second injection channel 36 is connected to the second material delivery pipe 19 at its outer end. The two raw materials are respectively injected into the arc-shaped mold cavity 51 from the rotating shafts 34 at both ends without interfering with each other.

[0044] Specific workflow: Before the injection molding machine closes the upper mold plate 1 and the lower mold plate 2, the flip mechanism is used to drive the primary molding groove 31 of the upper mold core 3 toward the arc-shaped mold cavity 51 of the lower mold core 5. After closing the mold, the plastic raw material is injected into the arc-shaped mold cavity 51 from the first feed pipe 18 and the first injection flow channel 35, and the outer layer injection molded part is made after the hard plastic raw material is shaped. At this time, there is no need to open the mold, and the adjustment mechanism is directly started. The cylinder 12 drives the discharge plate 13 to move upward, and the push rod 14 lifts the lifting block 4 upward for a distance to separate the upper mold core 3 from the injection molded part, and then the flip motor 6 is started to drive the upper mold core 3 to flip to the state facing the secondary molding groove 32 through the gear set 10, that is, flip 180°. After that, the telescopic rod of the cylinder 12 retreats, and under the action of the first spring 103, the lifting block 4 falls and abuts against the lower mold plate 2, so that the secondary molding groove 32 and the arc-shaped mold cavity 51 are molded together, and the limit motor 7 is started to drive the screw 11 to rotate, driving the extrusion sliders 8 on both sides to slide into the gap between the upper mold plate 1 and the lifting block 4, and the lifting block 4 is firmly pressed on the lower mold plate 2 by the extrusion sliders 8 to improve the sealing effect of the upper mold core 3 and the lower mold core 5. After that, another soft rubber raw material is injected into the arc-shaped mold cavity 51 from the second feed pipe 19 and the second injection flow channel 36, and a layer of soft rubber pad is injection molded on the outer layer of the injection molded part. After cooling and finalization, the mold is opened, and the upper mold plate 1 drives the lifting block 4 and the upper mold core 3 away, and the cylinder 12 is started again to push the limit block 16 to rise, and the lower mold core 5 moves up and out of the embedded groove. At this time, the entire clamping product can be easily taken out. The telescopic rod of the cylinder 12 is lowered back to its original position, and under the action of the second spring 17, the lower mold core 5 is also re-embedded into the bottom of the embedding groove downward to prepare for the next injection molding.

[0045] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A secondary injection mold for automobile parts, comprising an upper mold plate (1), a lower mold plate (2), a cylindrical upper mold core (3), a lifting block (4) and a lower mold core (5), characterized in that: The upper mold core (3) has a rotating shaft (34) coaxially arranged at both ends, and a rotating hole for the rotating shaft (34) to pass through is transversely opened on the lifting block (4). The lifting block (4) slides up and down along the upper mold plate (1). The lower mold plate (2) is provided with an adjusting mechanism for driving the lifting block (4) to rise, and the lifting block (4) is provided with a turning mechanism for driving the upper mold core (3) to rotate; the lower mold plate (2) is provided with an embedding groove for the lower mold core (5) to be embedded, and the cylindrical surface of the upper mold core (3) is respectively provided with an arc-shaped primary molding groove (31) and a secondary molding groove (32), and a plurality of protruding arc strips (33) are provided in the primary molding groove (31). The depth of the secondary molding groove (32) is greater than one The lower mold core (5) is provided with an arc-shaped mold cavity (51) that can cooperate with the primary molding groove (31) and the secondary molding groove (32); one of the rotating shafts (34) is provided with a first injection molding flow channel (35), and the other rotating shaft (34) is provided with a second injection molding flow channel (36); the upper mold core (3) is embedded with a first injection molding needle valve (37) connected to the first injection molding flow channel (35); the upper mold core (3) is also embedded with a second injection molding needle valve (38) connected to the second injection molding flow channel (36); the outlet of the first injection molding needle valve (37) is connected to the primary molding groove (31), and the outlet of the second injection molding needle valve (38) is connected to the secondary molding groove (32).

2. The secondary injection mold for automobile parts according to claim 1, characterized in that: The flipping mechanism comprises a flipping motor (6), a limit motor (7), an extrusion slider (8) and a slide rail (9). The flipping motor (6) is fixed on the lifting block (4) on the left side, and the limit motor (7) is fixed on the lifting block (4) on the right side. The rotating shaft (34) is connected to the output shaft of the flipping motor (6) through a gear set (10). The output shaft of the limit motor (7) is connected to a screw rod (11) by power. The extrusion sliders (8) on both sides are threadedly connected to the same screw rod (11). The two ends of the screw rod (11) are opposite thread sections. The extrusion slider (8) is embedded in the slide rail (9) and slides horizontally. When the extrusion slider (8) moves forward, it abuts against the lower end surface of the upper template (1) and makes the lifting block (4) abut against the lower template (2).

3. The secondary injection mold for automobile parts according to claim 2, characterized in that: The front end of the extrusion slider (8) is provided with an extrusion slope, and the upper end of the extrusion slider (8) is provided with a rubber layer (81).

4. The secondary injection mold for automobile parts according to claim 3, characterized in that: The upper template (1) is provided with a side slide block (101) protruding laterally, the side of the lifting block (4) is provided with a side slide groove (41), the side slide block (101) is inserted into the side slide groove (41), the upper end of the side slide groove (41) is closed, the upper end of the lifting block (4) is provided with a plurality of vertically arranged guide columns (42), and the upper template (1) is provided with a guide hole (102) for inserting the guide column (42).

5. The secondary injection mold for automobile parts according to claim 4, characterized in that: A first spring (103) is sleeved on the guide column (42), the upper end of the first spring (103) abuts against the upper template (1), and the lower end of the first spring (103) abuts against the upper end surface of the lifting block (4).

6. The secondary injection mold for automobile parts according to claim 1, characterized in that: The primary molding groove (31) and the secondary molding groove (32) are arranged symmetrically at 180° with the axis of the upper mold core (3) as the center line.

7. The secondary injection mold for automobile parts according to claim 1, characterized in that: The adjusting mechanism comprises a cylinder (12), a discharge plate (13) and a push rod (14); a mounting cavity (201) is formed on the lower template (2); the discharge plate (13) is located in the mounting cavity (201); the push rod (14) vertically penetrates downward into the mounting cavity (201) and is fixedly connected to the discharge plate (13); the upper end of the push rod (14) abuts against the lifting block (4); a through hole connected to the mounting cavity (201) is formed at the bottom of the lower template (2); and the telescopic rod of the cylinder (12) passes through the through hole and abuts against the discharge plate (13).

8. The secondary injection mold for automobile parts according to claim 7, characterized in that: A discharge rod (15) is provided on the lower mold plate (2). The upper end of the discharge rod (15) extends into the embedding groove and is fixedly connected to the lower mold core (5). The lower end of the discharge rod (15) extends into the installation cavity (201) and has a limit block (16). A second spring (17) is sleeved on the discharge rod (15). The upper end of the second spring (17) abuts against the top wall of the installation cavity (201), and the lower end of the second spring (17) abuts against the limit block (16). After the discharge plate (13) rises a certain distance, it can abut against the limit block (16).

9. The secondary injection mold for automobile parts according to claim 1, characterized in that: The outer end of the first injection molding flow channel (35) is connected to a first material delivery pipe (18), and the outer end of the second injection molding flow channel (36) is connected to a second material delivery pipe (19).

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