Double-color injection mold for automobile tail lamp cover

Abstract

The application discloses a double-color injection mold for an automobile tail lamp cover, which comprises a fixed mold, a movable mold and an ejection mechanism, the concave mold is provided with a pressing block corresponding to the outer periphery of a first cavity and a second cavity, the pressing block is slidably connected to the concave mold, the pressing block is provided with an inner concave driving groove, the convex mold is provided with a first driving block corresponding to the first cavity, the first driving block is matched with the driving groove, and the first driving block drives the pressing block to move to press the outer peripheral part of a first injection product, the second driving block is matched with the pressing block, and the second driving block drives the pressing block to move outward to be separated from the contact with the outer peripheral part of the first injection product, the convex mold is provided with a supporting piece corresponding to the outer periphery of the second cavity, the supporting piece supports the first injection product before the pressing block is separated, the outer periphery of the first injection product is pressed in the concave mold by the pressing block, and the combination of the pressing block and the supporting piece ensures that the first injection product is always pressed in the concave mold during the switching to the second injection, thereby effectively improving the injection quality and effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of molds, in particular to a double-color injection mold for automobile tail lamp covers. BACKGROUND

[0002] Automobile tail lamp covers are plastic products and are mainly injection molded by automobile injection molds. Since the flatness of the surface of the automobile tail lamp cover is required to be high, the current common method is to use an inverted injection mold for injection molding. The inverted mold mainly includes a fixed mold, a movable mold, an ejection mechanism, etc. The ejection mechanism and the gate system of the inverted mold are arranged on the fixed mold, so that the ejection mechanism contacts the non-outer surface of the product when it is ejected, avoiding the ejection defects of the outer surface of the product.

[0003] Some products of the automobile tail lamp cover have two colors, for example, the tail lamp cover body is one color and the frame around the periphery of the tail lamp cover is another color. For injection molding of such products, a double-color injection mold is usually used. The double-color injection mold includes two symmetrical cavities corresponding to different color plastics. After the injection molding of one color plastic is completed, the first color plastic part is transferred to another cavity for secondary injection molding by rotation. However, in the double-color injection molding process of the automobile tail lamp cover, since the inverted method is used for injection molding and the mold is usually horizontal, the first color plastic part will remain in the movable mold (concave mold) after the mold is opened. During the rotation switching process of the movable mold, the first color plastic part may be loose, which affects the subsequent secondary injection molding effect and ultimately affects the quality of the injection molded product, which needs to be further improved and perfected. SUMMARY

[0004] In order to further reduce the product loosening phenomenon during the rotation of the movable mold and improve the final injection molding quality, the present application provides a double-color injection mold for automobile tail lamp covers.

[0005] The present application provides a double-color injection mold for automobile tail lamp covers, which adopts the following technical solution:

[0006] The utility model provides a double -color injection mold of car tail lamp cover, including fixed mould, movable mould and ejection mechanism, the ejection mechanism sets up on fixed mould, be provided with male die on fixed mould, be provided with female die on movable mould, the fixed mould and movable mould form first cavity and second cavity for injection when closing, the female die is provided with pressure block around first cavity and second cavity, pressure block is connected on female die, the female die is provided with the recessed drive groove on pressure block, the male die is provided with first drive block with drive groove cooperation on first cavity, first drive block cooperation drive groove drives pressure block to move to the outer circumferential part of primary injection product, the male die is provided with second drive block with drive groove cooperation on second cavity, second drive block cooperation drive groove drives pressure block to move out and separate from the contact of primary injection product outer circumferential part, the male die is provided with the receiving member for receiving and pressing primary injection product around second cavity, the receiving member receives and presses primary injection product before pressure block separates.

[0007] Optionally, the receiving member includes a receiving rod, the ejection mechanism includes a top plate and a top rod, the receiving rod is elastically connected to the fixed mold, a linkage member is arranged between the receiving rod and the top plate to link the two, the receiving rod and the top plate are linked during the ejection of the top rod, and the receiving rod and the top plate are disengaged after the ejection of the top rod is completed.

[0008] Optionally, the linkage member includes a linkage block, the linkage block is slidingly connected to the top plate, the receiving rod has a stepped groove, a return spring is arranged on the top plate to drive the linkage block to slide into the stepped groove, a through hole is formed in the linkage block, a guide post corresponding to the through hole is arranged on the fixed mold, the guide post is arranged to penetrate into the through hole, the guide post and the inner wall of the through hole are provided with wedge surfaces matched with each other, and the guide post is inserted into the through hole during the upward movement of the top plate to drive the linkage block to disengage from the stepped groove.

[0009] Optionally, the bottom of the fixed mold is provided with a bottom plate, the bottom plate is fixedly provided with a fixed mold seat, the fixed mold seat is provided with a compression spring corresponding to the receiving rod, and the compression spring is used to drive the receiving rod to eject.

[0010] Optionally, the first drive block and the second drive block are both tapered trapezoidal and form guide surfaces on both sides, and the drive groove on the pressure block has a driving surface matched with the guide surfaces.

[0011] Optionally, the pressure blocks are spaced apart around the outer peripheries of the first cavity and the second cavity, the top rod and the receiving rod are alternately distributed around the outer periphery of the second cavity.

[0012] Optionally, the guide post is slidingly arranged on the fixed mold, and the sliding direction of the guide post is close to or away from the stepped groove.

[0013] Optionally, the fixed mold is provided with a sliding groove for sliding of the guide column, the guide column is provided with a fixing screw, the guide column and the bottom wall of the sliding groove are provided with corresponding screw holes matched with the fixing screw, the top plate is provided with an avoiding hole corresponding to the through hole and avoiding the guide column, and the diameter of the avoiding hole is larger than that of the through hole.

[0014] Optionally, the guide column is provided one-to-one with the receiving rod, the guide columns between adjacent receiving rods are provided with a linkage for linkage of reverse movement adjustment, and the fixed mold is provided with a driving source for driving movement adjustment of the guide column.

[0015] Optionally, the driving source comprises a hydraulic cylinder, the output end of the hydraulic cylinder is provided with a moving block, the linkage comprises a connecting rod, the connecting rod is symmetrically arranged on both sides of the moving block, one end of the connecting rod is hinged to the moving block, and the other end of the connecting rod is hinged to the guide column.

[0016] In summary, the present application has at least one of the following beneficial technical effects:

[0017] 1. After the first cavity is completed once injection molding and the mold is opened, the outer periphery of the once injection molded product is pressed in the concave mold by means of the pressing block, effectively preventing the displacement or loosening of the once injection molded product during the rotation switching process of the movable mold, and the second driving block cooperates with the driving groove on the pressing block to drive the gradual outward movement of each pressing block without pressing the outer periphery of the once injection molded product during the second injection molding process, so that the subsequent pressing block does not affect the subsequent secondary injection molding of the frame on the outer periphery of the once injection molded product, and the receiving member on the convex mold abuts against the once injection molded product during the outward movement of the pressing block to press it, avoiding the displacement and loosening of the once injection molded product after the outward movement of the pressing block, finally ensuring that the once injection molded product is always pressed in the concave mold during the switching to the second injection molding and does not move, finally effectively improving the injection molding quality and injection molding effect.

[0018] 2, after the secondary injection molding, the top plate rises and drives each ejector rod to move up and eject the product, at this time the linkage block is located in the stepped groove, the top plate moves up, the receiving rod moves up synchronously to achieve the ejection of the product, after the top plate moves to the limit position, the guide column is inserted into the through hole to drive the linkage block to move out of the stepped groove, at this time the receiving rod is no longer blocked by the linkage block, and the receiving rod will further move up under the action of the compression spring to eject the product, so that the injection molded product is further ejected, facilitating subsequent material removal, when the top plate moves down to reset, the receiving rod is not linked with the top plate at this time, and the top end of the receiving rod is still in the ejection state, when the mold rotates for secondary injection after one injection molding is completed, the receiving rod in the ejection state can press the one injection molded product before the pressing block moves out of the pressing position, realizing the pre-pressing, avoiding the situation that the one injection molded product is loose or displaced during the mold closing, affecting the injection molding quality and effect, realizing the multipurpose of the receiving rod, and after the mold closing of the secondary injection is completed, the receiving rod is pressed to reset to the initial state and the linkage block moves into the stepped groove again;

[0019] 3, the guide column can be adjusted according to actual needs, the receiving rod does not need to be in the ejection state to advance the receiving rod to press the one injection molded product, the position of the guide column is moved to the direction of the stepped groove, so that the wedge surface of the guide column does not drive the linkage block to slide out of the stepped groove during the upward movement of the top plate, at this time the receiving rod and the ejector rod on the top plate are always in a synchronous lifting state, so that the receiving rod can be used as a common ejector rod, and the compression spring can play a role in assisting lifting when the top plate moves up during use, and the compression spring plays a certain buffering role when the top plate moves down to reset, so that the receiving rod can be used in a simple and convenient manner. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall structure diagram of example 1.

[0021] Figure 2 is the perspective view of the movable mold in example 1.

[0022] Figure 3 is the front view of the movable mold at the concave mold in example 1.

[0023] Figure 4 is the structure diagram of the one injection molded product and the pressing block in example 1.

[0024] Figure 5 is the perspective view of the fixed mold in example 1.

[0025] Figure 6 is Figure 5 is the enlarged view of A in example 1.

[0026] Figure 7 is the front view of the fixed mold at the convex mold in example 1.

[0027] Figure 8 is Figure 7 a sectional view at B-B in Fig.

[0028] Figure 9 is Figure 8 an enlarged view at C in Fig.

[0029] Figure 10 is Figure 8 an enlarged view at D in Fig.

[0030] Figure 11 is a partial sectional view of Example 2 at the receiving rod.

[0031] Figure 12 is a schematic view of the connecting structure between adjacent guide pillars in Example 3.

[0032] BRIEF DESCRIPTION OF DRAWINGS

[0033] 1, fixed mold; 2, movable mold; 3, female mold; 4, gate; 5, primary injection product; 6, pressing block; 7, guide base; 8, guide groove; 9, driving groove; 10, first driving block; 11, second driving block; 12, first male mold; 13, second male mold; 14, guide surface; 15, driving surface; 16, receiving rod; 17, top plate; 18, ejector pin; 19, bottom plate; 20, compression spring; 21, linkage block; 22, stepped groove; 23, return spring; 24, through hole; 25, guide pillar; 26, wedge surface; 27, sliding groove; 28, fixing screw; 29, screw hole; 30, avoiding hole; 31, hydraulic cylinder; 32, moving block; 33, connecting rod; 34, fixed mold base. DETAILED DESCRIPTION

[0034] The following will be further explained in detail in connection with the accompanying Figures 1-12 The present application is further explained in detail.

[0035] Example 1, a double-color injection mold for an automobile tail lamp cover, as shown in Figures 1-5As shown, the system includes a fixed mold 1, a moving mold 2, and an ejection mechanism. The ejection mechanism is mounted on the fixed mold 1 and is used to eject the final product after injection molding. In actual use, the moving mold 2 has a power source that drives the moving mold 2 to open, close, and rotate. A punch is mounted on the fixed mold 1, and a die 3 is mounted on the moving mold 2. After the fixed mold 1 and the moving mold 2 are closed, a cavity for injection molding is formed between the punch and the die 3. The fixed mold 1 has a gate 4 that communicates with the cavity. In this embodiment, the cavity includes a first cavity and a second cavity. There are two symmetrically arranged first cavities and two symmetrically arranged second cavities, which allows two products to be injection molded at once. The first cavity is used to injection mold a single injection product 5, and the second cavity is used to injection mold a border of different colors around the outer periphery of the single injection product 5. The single injection product 5 is the taillight cover body, and the second injection product is... The molded product is the outer circumference frame of the taillight cover. There are two gates 4, which correspond to the first cavity and the second cavity respectively. In the actual injection molding process, the moving mold 2 is driven to close with the fixed mold 1, and then injection molding is performed into the first cavity to obtain the first injection molded product 5 located in the first cavity. Then the mold is opened, at which time the first injection molded product 5 is located in the cavity 3 of the moving mold 2. The moving mold 2 is then driven to rotate 180 degrees, so that the cavity 3 with the first injection molded product 5 corresponds to another set of punches on the fixed mold 1. The mold is closed again for injection molding. The second injection molding is performed in the second cavity to mold the frame, which is located on the outer circumference of the first injection molded product 5. After completion, the mold is opened and the product is ejected with the help of the ejection mechanism to realize the dual-color injection molding of the car taillight cover. Multiple products are molded in one injection, and the rotation of the moving mold 2 is combined to realize the simultaneous injection molding of the first cavity and the second cavity, which effectively improves production efficiency.

[0036] like Figures 2-4 As shown, a pressure block 6 is provided on the outer periphery of the cavity corresponding to the cavity of the die 3. The pressure blocks 6 are evenly distributed around the outer periphery of the cavity. In this embodiment, the pressure blocks 6 are slidably connected to the die 3. The sliding direction of the pressure blocks 6 is towards the inside of the cavity. The pressure blocks 6 are used to press the first injection molded product 5 formed in the first cavity. The pressure blocks 6 are used to prevent the first injection molded product 5 from being displaced or loosened during the rotation of the moving mold 2 after the mold is opened.

[0037] like Figures 4-6As shown, a guide seat 7 is arranged at the bottom of the pressing block 6, the guide seat 7 is fixed on the concave die 3, the guide seat 7 has a guide groove 8 for the sliding of the pressing block 6, an inner recessed driving groove 9 is arranged on the top wall of the pressing block 6, and a driving block corresponding to the driving groove 9 on the pressing block 6 is arranged on the convex die, the driving block includes a first driving block 10 and a second driving block 11, the convex die includes a first convex die 12 and a second convex die 13, wherein the first convex die 12 forms a first cavity after being combined with the concave die 3, and the second convex die 13 forms a second cavity after being combined with the concave die 3, wherein the first driving block 10 is arranged on the first convex die 12, and the second driving block 11 is arranged on the second convex die 13, the first driving block 10 and the second driving block 11 are both tapered trapezoidal and form a guide surface 14 on both sides, and the pressing block 6 has a driving surface 15 matched with the guide surface 14, so that during the first injection molding combined with the mold, the first driving block 10 cooperates with the driving groove 9 of the pressing block 6 on the concave die 3, and the pressing block 6 is driven to move to the outer peripheral part of the primary injection product 5 by the fit of the guide surface 14 and the driving surface 15, so that after the subsequent mold opening, the primary injection product 5 remains in the concave die 3 and is pressed by the outer peripheral pressing block 6, thereby effectively avoiding the displacement or loosening of the primary injection product 5 in the concave die 3 during mold opening and subsequent rotation of the movable die 2 to switch positions, and ensuring that the primary injection product 5 can be stably located in the concave die 3.

[0038] As shown in the drawings, Figure 7 In the embodiment, the second driving block 11 and the first driving block 10 are in different positions corresponding to the cavities, and the movable die 2 rotates to drive the primary injection product 5 to correspond to the second convex die 13, and then the mold is combined, during which the second driving block 11 cooperates with the driving groove 9 on the pressing block 6, gradually driving each pressing block 6 to move outward to avoid the outer periphery of the primary injection product 5, realizing the synchronous outward movement of each pressing block 6 during mold closing, avoiding the blocking interference of the pressing block 6 when the frame is injection molded on the outer periphery of the primary injection product 5 during subsequent secondary injection, automatically realizing the synchronous outward movement of all pressing blocks 6, and the structure is simple and does not require other additional operations.

[0039] As shown in the drawings, Figures 7-10 As shown in the drawings,

[0040] As shown in the drawings, Figures 7-10As shown, the receiving component includes a receiving rod 16, and the ejection mechanism includes a top plate 17 and ejector rods 18. Multiple ejector rods 18 are provided and fixed on the top plate 17. The top end of the ejector rod 18 corresponds to the outer periphery of the second cavity. The top plate 17 is lifted and connected to the fixed mold 1. In actual use, the top plate 17 is lifted and connected by a hydraulic cylinder to achieve the ejection of the final injection molded product. The receiving rod 16 is elastically connected to the fixed mold 1. A linkage component is provided between the receiving rod 16 and the ejector rod 18 to move upward and eject synchronously. During the ejection of the ejector rod 18, the receiving rod 16 and the top plate 17 are linked. After the ejector rod 18 is completely ejected, the receiving rod 16 and the top plate 17 are disengaged.

[0041] like Figures 7-10 As shown, a base plate 19 is provided at the bottom of the fixed mold 1, and a fixed mold base 34 is fixed on the base plate 19. A compression spring 20 is provided on the fixed mold base 34 corresponding to the receiving rod 16. The compression spring 20 is used to drive the receiving rod 16 to move upward and be ejected. The linkage component includes a linkage block 21, which is slidably connected to the top plate 17. The sliding direction of the linkage block 21 is perpendicular to the ejection direction of the receiving rod 16. The receiving rod 16 has a stepped groove 22. At the same time, a return spring 23 is provided on the top plate 17 to drive the linkage block 21 to slide into the stepped groove 22. A through hole 24 is provided on the linkage block 21. The through hole 24 is oriented in the same direction as the lifting direction of the top plate 17. The fixed mold 1 is provided with a guide post 25 corresponding to the through hole 24. The guide post 25 is fixed to the fixed mold 1 by screws. When the top plate 17 rises and drives the ejector rod 18 to eject, the guide post 25 is inserted into the through hole 24. The guide post 25 and the inner wall of the through hole 24 are provided with matching wedge-shaped surfaces 26. During the ejection process of the top plate 17 moving upward, the guide post 25 is inserted into the through hole 24 and drives the linkage block 21 to gradually disengage from the step groove 22. When the top plate 17 drives the ejector rod 18 to complete the ejection action, the linkage block 21 disengages from the step groove 22.

[0042] Thus, when the top plate 17 rises to drive the ejector rod 18 to eject, in the initial state, the linkage block 21 is located in the stepped groove 22, and the receiving rod 16 moves upward synchronously under the action of the compression spring 20 during the rising of the top plate 17, at this time, the receiving rod 16 and the ejector rod 18 maintain the same ejection state, when the top plate 17 rises to the ejection limit position, the linkage block 21 is driven out of the stepped groove 22 by the guide column 25, at this time, the linkage block 21 no longer presses the receiving rod 16, and the receiving rod 16 further moves upward under the action of the compression spring 20, at this time, the top end of the receiving rod 16 is appropriately higher than the top end of the ejector rod 18, so that the injection molded product can be further ejected by the receiving rod 16 during ejection, which is more convenient for subsequent stripping, and better ejection stripping effect is achieved; when the top plate 17 moves downward to reset, the receiving rod 16 is not linked at this time, and the top end of the receiving rod 16 is still in the ejection state, when the movable die 2 rotates for secondary injection molding after completing the first injection molding, the receiving rod 16 in the ejection state can press the first injection molded product 5 once during the movement of the pressing block 6, so as to realize the pre-pressing, and the receiving rod 16 relays the pressing of the pressing block 6 on the first injection molded product 5, so as to avoid the situation that the first injection molded product 5 is loosened or shifted during the movement of the pressing block 6, which affects the injection molding quality and effect, and the receiving rod 16 has multiple purposes, after the completion of the secondary injection molding, the receiving rod 16 gradually moves downward and shrinks to the initial state under the pressure of the movable die 2, the guide column 25 is out of the through hole 24 of the linkage block 21, and the linkage block 21 is re-inserted into the stepped groove 22 under the action of the return spring 23, so as to realize the reset of the receiving rod 16.

[0043] As shown in Figure 7 the embodiment, the ejector rod 18 and the receiving rod 16 are alternately distributed on the outer periphery of the second cavity, so that the ejector rod 18 and the receiving rod 16 are more evenly distributed, the ejection link can stably eject the molded product, the relay link can stably press each area on the outer periphery of the first injection molded product 5, and finally more stable ejection effect and receiving and pressing effect are achieved, in the embodiment, the receiving rod 16 is provided with four receiving rods, and the two receiving rods are symmetrically distributed on the two sides of the second cavity.

[0044] The working principle of the embodiment of the present application is as follows: during the first injection molding, the movable mold 2 moves to close the mold, the first material is injected from the gate 4 into the first cavity, and a one-time injection product 5 is obtained by injection molding, then the movable mold 2 moves to open the mold, at this time, the one-time injection product 5 is located in the concave mold 3 of the movable mold 2 and is pressed tightly by the pressing block 6 to prevent loosening of the one-time injection product 5; the movable mold 2 is rotated by 180 degrees so that the concave mold 3 with the one-time injection product 5 corresponds to the second convex mold 13, the mold is closed again, the receiving rod 16 will press the one-time injection product 5 during the closing of the mold, and the pressing block 6 gradually moves out of the one-time injection product 5 during the closing of the mold, after the mold is closed, the second material is injected from the other gate 4 into the second cavity, the frame is formed on the periphery of the one-time injection product 5 in the second cavity, and the frame and the one-time injection product 5 form an integrated double-color automobile lamp cover, and finally the completed injection product double-color automobile lamp cover is ejected after the mold is opened.

[0045] Embodiment 2, a double-color injection mold for an automobile lamp cover, as shown in Figure 11 The main difference between the embodiment 2 and the embodiment 1 is that the guide column 25 is slidably arranged on the fixed mold 1, the sliding adjustment direction of the guide column 25 is close to or away from the step groove 22, the sliding groove 27 for the sliding of the guide column 25 is arranged on the fixed mold 1, the cross section of the sliding groove 27 is T-shaped or dovetail-shaped, the fixed screw 28 is arranged on the guide column 25, the screw holes 29 corresponding to the fixed screw 28 are arranged on the guide column 25 and the bottom wall of the sliding groove 27, the avoiding hole 30 avoiding the guide column 25 is arranged on the top plate 17 corresponding to the through hole 24, and the diameter of the avoiding hole 30 is larger than the diameter of the through hole 24.

[0046] In this way, the position of the guide column 25 can be adjusted according to actual needs, when the receiving rod 16 needs to be in the ejection state to receive and press the one-time injection product 5 in advance, the fixed screw 28 is loosened, the guide column 25 is driven to move to the direction of the step groove 22 under the action of the reset spring 23 during the upward movement of the top plate 17, so that the adjustment is realized, at this time, the linkage block 21 is always located in the step groove 22, and the receiving rod 16 and the top rod 18 on the top plate 17 are always in a synchronous lifting state, so that the receiving rod 16 can be used as a common top rod 18, and the compression spring 20 can play a role in assisting the lifting when the top plate 17 is moved upward for ejection, and the compression spring 20 plays a certain buffering role when the top plate 17 is moved downward for resetting, so that the switching of the use state of the receiving rod 16 is realized simply, and the switching operation is simple and convenient; the operation of moving and adjusting the guide column 25 is also simple, only the fixed screw 28 needs to be loosened, when the position of the guide column 25 needs to be fixed, the guide column 25 is only slid to the position corresponding to the screw hole 29 and then the fixed screw 28 is tightened.

[0047] Embodiment 3, a double-color injection mold for an automobile lamp cover, as shown in Figure 12As shown, the difference from example 2 is mainly that a linkage for synchronously adjusting the reverse movement of the adjacent guide pillars 25 is arranged between the guide pillars 25, the receiving rod 16 of the example is no longer fixed by the fixing screw 28, a driving source for driving the movement and adjustment of the guide pillars 25 is arranged on the fixed mold 1, the driving source comprises a hydraulic cylinder 31, the output end of the hydraulic cylinder 31 is provided with a moving block 32, the linkage comprises a connecting rod 33, the connecting rod 33 is symmetrically arranged on both sides of the moving block 32, one end of the connecting rod 33 is hinged to the moving block 32, and the other end is hinged to the guide pillar 25, so that the lifting of the moving block 32 is driven by the hydraulic cylinder 31, and the reverse movement and synchronous adjustment of the adjacent two guide pillars 25 can be driven by the transmission of the connecting rod 33, the position state of the guide pillar 25 is switched, the receiving rod 16 can be switched and used according to actual needs, the adjustment operation of the guide pillar 25 is more convenient, and the mold as a whole can meet the use needs of more injection molding occasions, and has better practicality and applicability.

[0048] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A two-color injection mold for automotive taillight covers, characterized in that: The mold includes a fixed mold (1), a moving mold (2), and an ejection mechanism. The ejection mechanism is mounted on the fixed mold (1). The fixed mold (1) has a punch, and the moving mold (2) has a cavity (3). When the fixed mold (1) and the moving mold (2) are closed, they form a first cavity and a second cavity for injection molding. The cavity (3) has a pressure block (6) on its outer periphery corresponding to the first cavity and the second cavity. The pressure block (6) is slidably connected to the cavity (3). The pressure block (6) has an inwardly recessed drive groove (9). The punch has a first drive block that mates with the drive groove (9) at the location corresponding to the first cavity. (10) When the first driving block (10) cooperates with the driving groove (9), it drives the pressure block (6) to move to press the outer periphery of the primary injection molded product (5). The punch is provided with a second driving block (11) that cooperates with the driving groove (9) at the second cavity. When the second driving block (11) cooperates with the pressure block (6), it drives the pressure block (6) to move outward and disengage from the contact with the outer periphery of the primary injection molded product (5). The punch is provided with a receiving member for receiving and pressing the primary injection molded product (5) at the outer periphery of the second cavity. The receiving member receives and presses the primary injection molded product (5) before the pressure block (6) disengages. The receiving component includes a receiving rod (16), and the ejection mechanism includes a top plate (17) and an ejector rod (18). The receiving rod (16) is elastically connected to the fixed mold (1). A linkage component is provided between the receiving rod (16) and the top plate (17) to link the two. During the ejection of the ejector rod (18), the receiving rod (16) and the top plate (17) are linked. After the ejector rod (18) completes ejection, the receiving rod (16) and the top plate (17) are disengaged. The linkage component includes a linkage block (21), which is slidably connected to the top plate (17). The receiving rod (16) has... The top plate (17) is provided with a return spring (23) that drives the linkage block (21) to slide into the step groove (22). The linkage block (21) is provided with a through hole (24). The fixed mold (1) is provided with a guide post (25) corresponding to the through hole (24). The guide post (25) is used to penetrate into the through hole (24). The guide post (25) and the inner wall of the through hole (24) are provided with matching wedge surfaces (26). During the upward movement of the top plate (17), the guide post (25) is inserted into the through hole (24) to drive the linkage block (21) to disengage from the step groove (22).

2. The dual-color injection mold for an automotive taillight cover according to claim 1, characterized in that: The bottom of the fixed mold (1) is provided with a base plate (19), and a fixed mold base (34) is fixed on the base plate (19). A compression spring (20) is provided on the fixed mold base (34) corresponding to the receiving rod (16). The compression spring (20) is used to drive the receiving rod (16) to push out.

3. The dual-color injection mold for an automotive taillight cover according to claim 1, characterized in that: The first driving block (10) and the second driving block (11) are both conical trapezoids and have guide surfaces (14) on both sides. The driving groove (9) on the pressure block (6) has a driving surface (15) that matches the guide surface (14).

4. The dual-color injection mold for an automotive taillight cover according to claim 1, characterized in that: Multiple pressure blocks (6) are distributed at intervals around the outer periphery of the first cavity and the second cavity, and the top rod (18) and the receiving rod (16) are alternately distributed around the outer periphery of the second cavity.

5. The dual-color injection mold for an automotive taillight cover according to claim 4, characterized in that: The guide post (25) is slidably and adjustablely disposed on the fixed mold (1), and the sliding direction of the guide post (25) is closer to or farther away from the step groove (22).

6. The dual-color injection mold for an automotive taillight cover according to claim 5, characterized in that: The fixed mold (1) is provided with a sliding groove (27) for sliding the guide post (25). A fixing screw (28) is provided on the guide post (25). The bottom wall of the guide post (25) and the sliding groove (27) are provided with corresponding screw holes (29) that cooperate with the fixing screw (28). The top plate (17) is provided with a clearance hole (30) for avoiding the guide post (25) at the corresponding through hole (24). The diameter of the clearance hole (30) is larger than the diameter of the through hole (24).

7. A two-color injection mold for an automotive taillight cover according to claim 5, characterized in that: The guide post (25) and the receiving rod (16) are arranged in a one-to-one correspondence. A linkage component is provided between the guide post (25) of the adjacent receiving rod (16) to adjust their opposite movement. The fixed mold (1) is provided with a drive source to drive the guide post (25) to move and adjust.

8. A two-color injection mold for an automotive taillight cover according to claim 7, characterized in that: The driving source includes a hydraulic cylinder (31), and a moving block (32) is provided at the output end of the hydraulic cylinder (31). The linkage includes a connecting rod (33), which is symmetrically arranged on both sides of the moving block (32). One end of the connecting rod (33) is hinged to the moving block (32), and the other end is hinged to the guide post (25).

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