High-precision double-color forming die for automobile ornament

Abstract

The utility model provides a high-precision automobile ornament double-color forming die which comprises a first front die assembly, a second front die assembly and a rear die assembly, the first front die assembly is provided with a first front die core, a plurality of first fine positioning matching assemblies and elastic pressing assemblies, and the first fine positioning matching assemblies and the elastic pressing assemblies are both arranged on the first front die core; a second front mold core and a plurality of second fine positioning matching assemblies are arranged on the second front mold assembly; the rear mold assembly is provided with a rear mold core and a plurality of third fine positioning matching assemblies, the third fine positioning matching assemblies are arranged on the periphery of the rear mold core correspondingly, and the rear mold core is sequentially connected with the first front mold core and the second front mold core to form a first cavity and a second cavity correspondingly. The third fine positioning matching assembly is sequentially connected with the first fine positioning matching assembly and the second fine positioning matching assembly in a small clearance fit mode, and the elastic pressing end of the elastic pressing assembly extends into the first cavity. The device has the advantages of being high in precision, good in stability and high in working efficiency.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a high-precision two-color molding mold for automobile accessories. Background Art

[0002] A two-color mold refers to a mold in which two plastic materials are injected on the same injection molding machine and molded in two steps, but the product is only ejected once. The structures of the two rear molds in the two-color mold are the same, and the structures of the two front molds are different. After one injection, the two rear molds need to be rotated 180° so that the rear mold after one injection can cooperate with the front mold after the second injection to facilitate the second injection.

[0003] For the central control gear cover of the car, due to the large product size, high appearance requirements, and high dimensional accuracy requirements, it is difficult for traditional molds to produce a hollow gear cover that meets the requirements. Now there is an urgent need for a high-precision two-color molding mold for automotive accessories. Summary of the invention

[0004] The utility model aims to provide a high-precision automobile decoration two-color molding die with high precision and good stability.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a high-precision two-color molding mold for automotive accessories, including a first front mold component, a second front mold component and at least one rear mold component, the first front mold component is provided with a first front mold core, a plurality of first precision positioning matching components and a plurality of spring-pressing components, the first precision positioning matching components and the spring-pressing components are both arranged on the first front mold core, and the plurality of first precision positioning matching components are respectively arranged on the four sides of the first front mold core; the second front mold component is provided with a second front mold core and a plurality of second precision positioning matching components, the plurality of second precision positioning matching components are respectively arranged on the four sides of the second front mold core; the rear mold component is provided with a rear mold core and a plurality of third precision positioning matching components, the plurality of third precision positioning matching components are respectively arranged on the four sides of the rear mold core, the rear mold core is connected with the first front mold core and the second front mold core in sequence to form a first cavity and a second cavity in sequence, the third precision positioning matching component is connected with the first precision positioning matching component and the second precision positioning matching component in sequence with a small gap, and the spring-pressing end of the spring-pressing component extends into the first cavity.

[0006] It can be seen from the above scheme that by setting the third precision positioning matching component to be connected with the first precision positioning matching component and the second precision positioning matching component with a small gap in sequence, the front mold component and the rear mold component can be accurately matched regardless of whether it is the first injection molding or the second injection molding, which is beneficial to improving product precision; by setting the spring-pressing component, when the mold is opened for the first injection molding, the spring-pressing component can stably press the semi-finished product on the rear mold component, avoiding the semi-finished product being lifted up during the mold opening process and causing position displacement, thereby further improving product precision and work efficiency.

[0007] A further solution is that the first front mold core is provided with a plurality of first mounting holes; the first precision positioning and fitting assembly includes a first front positioning piece, a first front sleeve, a first front locking piece and a first front locking block, the first front positioning piece and the first front sleeve are both arranged in the first mounting hole, and the gap between the first front positioning piece and the first mounting hole is smaller than the gap between the first front sleeve and the first mounting hole, the first front locking piece passes through the first front locking block and the first front sleeve to be connected with the first front positioning piece, and the first front positioning piece is provided with a first front positioning hole; the rear mold core is provided with a plurality of rear mounting holes; the second precision positioning and fitting assembly includes a rear positioning piece, a rear sleeve, a rear locking piece and a rear locking block, the rear positioning piece and the rear sleeve are both arranged in the rear mounting hole, and the gap between the rear positioning piece and the rear mounting hole is smaller than the gap between the rear sleeve and the rear mounting hole, the rear locking piece passes through the rear locking block and the rear sleeve to be connected with the rear positioning piece, the rear positioning piece is provided with a rear protrusion protruding from the rear mold core, and the rear protrusion cooperates with a small gap in the first front positioning hole.

[0008] It can be seen from the above scheme that by setting the rear protrusion to cooperate with the first front positioning hole with a small gap, the first front mold assembly and the rear mold assembly can be accurately molded together. By setting the first front sleeve and the rear sleeve, the installation positions of the first front positioning member and the rear positioning member can be conveniently fixed, which is conducive to the installation and replacement of the first front positioning member and the rear positioning member, and the assembly and maintenance are simple and convenient.

[0009] A further solution is that the second front mold core is provided with a plurality of second mounting holes; the second precision positioning matching assembly includes a second front positioning piece, a second front sleeve, a second front locking piece and a second front locking block, the second front positioning piece and the second front sleeve are both arranged in the second mounting hole, and the gap between the second front positioning piece and the second mounting hole is smaller than the gap between the second front sleeve and the second mounting hole, the second front locking piece passes through the second front locking block and the second front sleeve and is connected to the second front positioning piece, the second front positioning piece is provided with a second front positioning hole, and the second front positioning hole can be matched with a small gap with the rear protrusion.

[0010] It can be seen from the above scheme that by setting the second front positioning hole, it can cooperate with the rear protrusion with a small gap to achieve precise mold closing of the second front mold assembly and the rear mold assembly. By setting the second front sleeve and the rear sleeve, it is convenient to fix the installation position of the second front positioning member and the rear positioning member, which is conducive to facilitating the installation and replacement of the second front positioning member and the rear positioning member.

[0011] A further solution is that a spring lock mounting hole is opened on the first front mold core, and the spring lock mounting hole includes a first hole segment, a second hole segment, a third hole segment and a fourth hole segment in sequence along its axial direction; the spring-pressing assembly includes a pressure block, a spring lock connecting piece and a first elastic piece, the pressure block is arranged in the fourth hole segment, the first end of the spring lock connecting piece is arranged in the first hole segment, the second end of the spring lock connecting piece passes through the second hole segment and the third hole segment to be connected with the pressure block, and the first elastic piece elastically abuts between the end wall of the third hole segment and the pressure block, so that the pressure block can extend and retract into the fourth hole segment.

[0012] It can be seen from the above scheme that by providing the first elastic member, when the first front mold assembly and the rear mold assembly are opened, the pressing block can automatically pop out to fix the semi-finished product on the rear mold assembly to prevent the semi-finished product from being lifted up.

[0013] A further solution is that a groove is provided on a side of the pressing block facing the first cavity, and the groove is communicated with the first cavity.

[0014] It can be seen from the above solution that by directly arranging a groove communicating with the first cavity on the pressing block, the bottom wall of the pressing block is grooved into a local cavity wall of the first cavity, ensuring that the pressing block can fully contact with the semi-finished product.

[0015] A further solution is that the first front mold assembly also includes a first front mold frame, on which a plurality of first pushing members are arranged, and the plurality of first pushing members are respectively arranged on the outer sides of the first front mold core; the rear mold assembly also includes a rear mold frame and a plurality of sliding members, and the plurality of sliding members are all arranged on the rear mold frame and respectively arranged on the outer sides of the rear mold core, and the sliding member includes an insert and a sliding seat, one end of the insert is connected to the sliding seat, and the other end of the insert extends into the first cavity or the second cavity; when the first front mold assembly and the rear mold assembly are closed, the first pushing member can push the sliding member to move toward the first cavity along the vertical mold opening direction.

[0016] It can be seen from the above scheme that by providing a first pushing member, it is used to push the slide assembly to move toward the first cavity along a direction perpendicular to the mold opening direction, so that one end of the insert can extend into the first cavity.

[0017] A further solution is that the second front mold assembly includes a second front mold frame, on which a plurality of first inclined tops are arranged, and the first inclined tops are arranged corresponding to the sliding seats; when the second front mold assembly and the rear mold assembly are molded together, the first inclined tops can push the sliding assembly to move along the vertical mold opening direction back to the second cavity direction.

[0018] It can be seen from the above scheme that by providing the first inclined top, when the second cavity is opened, the slide assembly can be pushed to move in a direction perpendicular to the mold opening direction away from the second cavity, so that the insert is separated from the product.

[0019] A further solution is that the slide assembly also includes a block, a second elastic member and a baffle plate. An insertion hole extending along the mold opening direction is opened in the slide seat. A through hole is opened in at least one side of the insertion hole. The block is arranged in the through hole. The baffle plate blocks the opening of the through hole. The second elastic member elastically abuts between the baffle plate and the block, so that the first end of the block can extend into the insertion hole and slide in the through hole. The first end of the block is provided with an inclined surface cooperating with the first inclined top, so that the first inclined top can drive the slide seat and the insert to move through the block.

[0020] It can be seen from the above scheme that by providing the second elastic member and the stopper, it is convenient for the first inclined top to be easily inserted into the insertion hole and abut against the inclined surface of the stopper, and the sliding seat is driven to move by the stopper, thereby separating the insert from the product.

[0021] A further solution is that the rear mold assembly is also provided with an ejector plate and a plurality of second inclined ejectors, the first ends of the second inclined ejectors are arranged in the rear mold core, and the second ends of the second inclined ejectors are connected to the ejector plate; the first ends of the second inclined ejectors are provided with end heads, the end heads extend into the first cavity and / or the second cavity, a U-shaped groove and a protrusion are provided on one side of the end heads, the protrusion is provided in the middle of the U-shaped groove, the U-shaped groove is connected with the first cavity or the second cavity to form a U-shaped glue inlet channel, and when the second cavity is opened, the ejector plate can drive the second inclined ejectors to move relative to the rear mold core along the opening direction.

[0022] A further solution is that arc grooves are provided on both sides of the protrusion, the arc grooves are connected to the U-shaped grooves, and the extension direction of the arc grooves intersects with the moving direction of the second inclined top; when the second cavity is opened, the second inclined top can drive the arc grooves and the sprue materials in the U-shaped grooves to move together.

[0023] It can be seen from the above scheme that by setting the arc groove, after the secondary injection molding, when the second inclined ejector performs the ejection movement, it can drive the sprue material to eject and prevent the product from breaking during ejection, while separating the sprue material from the second inclined ejector. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a cross-sectional view of the first viewing angle of the connection between the first front mold assembly and the rear mold assembly in an embodiment of the utility model.

[0025] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0026] Figure 3 It is a cross-sectional view of the connection between the first front mold assembly and the rear mold assembly at a second viewing angle in an embodiment of the utility model.

[0027] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0028] Figure 5 It is a cross-sectional view of the connection between the first front mold assembly and the rear mold assembly at a third viewing angle in an embodiment of the utility model.

[0029] Figure 6 It is a structural diagram of the first front mold assembly in an embodiment of the utility model.

[0030] Figure 7 It is a structural diagram of the connection of the rear mold assembly in the embodiment of the utility model.

[0031] Figure 8It is a structural diagram of the rear mold core, the spring-pressing component, the slide component and the first precision positioning matching component in the embodiment of the utility model.

[0032] Fig. 9 It is a cross-sectional view of the connection between the second front mold assembly and the rear mold assembly in an embodiment of the utility model.

[0033] Fig.10 It is a structural diagram of the second front mold assembly in an embodiment of the utility model.

[0034] Fig.11 It is an exploded view of the first inclined roof and the slide assembly in the embodiment of the utility model.

[0035] Fig.12 It is an exploded view of the rear mold core, the second inclined top and the nozzle material in the embodiment of the utility model.

[0036] Fig.13 yes Fig.12 Enlarged view of point C in the middle.

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0038] See also Figures 1 to 10 The embodiment provides a high-precision two-color molding mold for automotive accessories, including a first front mold component 1, a second front mold component 2 and two rear mold components 3, and the two rear mold components 3 are respectively connected to the first front mold component 1 and the second front mold component 2.

[0039] The first front mold assembly 1 is provided with a first front mold core 11, a first front mold frame 12, four first precision positioning matching components 13 and eight spring-pressing components 14. The first front mold core 11 is provided on the first front mold frame 12, the first precision positioning matching component 13 and the spring-pressing component 14 are both provided on the first front mold core 11, and the four first precision positioning matching components 13 are respectively provided on the four sides of the first front mold core 11.

[0040] The rear mold assembly 3 is provided with a rear mold core 31, a rear mold frame 32 and four third precision positioning matching components 33. The rear mold core 31 is arranged on the rear mold frame 32. The four third precision positioning matching components 33 are respectively arranged on the four sides of the rear mold core 31, and the third precision positioning matching components 33 are arranged corresponding to the first precision positioning matching components 13.

[0041] The rear mold core 31 and the first front mold core 11 are molded together to form a first cavity that is approximately rectangular. At this time, the third precision positioning matching component 33 is connected with the first precision positioning matching component 13 by a small clearance fit. The small clearance fit connection of this embodiment means that the gap between the two is smaller than the gap between the guide column of the front mold component and the guide hole of the rear mold component 3, so as to improve the fit accuracy of the two. Furthermore, the small clearance fit connection can be a zero clearance fit connection.

[0042] Specifically, the first front mold core 11 is provided with four first mounting holes 111, and the first mounting holes 111 penetrate the first front mold core 11 along the mold opening direction, and the first mounting holes 111 are set as stepped holes. The first precision positioning matching assembly 13 includes a first front positioning member 131, a first front sleeve 132, a first front locking member 133 and a first front locking block 134. The first front positioning member 131, the first front sleeve 132 and the first front locking block 134 are sequentially arranged in the first mounting hole 111, and the first front positioning member 131 is arranged at one end of the first mounting hole 111 close to the rear mold assembly 3. The gap between the first front positioning member 131 and the first mounting hole 111 is smaller than the gap between the first front sleeve 132 and the first mounting hole 111, so as to improve the positioning accuracy of the first front positioning member 131. The first front locking block 134 is disposed on the upper portion of the first mounting hole 111, and the first front locking member 133 passes through the first front locking block 134 and the first front sleeve 132 to connect with the first front positioning member 131 to prevent the first front positioning member 131 from being separated from the first front mold core 11. The first front positioning member 131 has a first front positioning hole formed therein.

[0043] The rear mold core 31 is provided with four rear mounting holes 311, and the rear mounting holes 311 are set as stepped holes. The third precision positioning matching assembly 33 includes a rear positioning member 331, a rear sleeve 332, a rear locking member 333 and a rear locking block 334. The rear positioning member 331, the rear sleeve 332 and the rear locking block 334 are sequentially arranged in the rear mounting hole 311, and the rear positioning member 331 is arranged in the rear mounting hole 311 near one end of the front mold assembly. The gap between the rear positioning member 331 and the rear mounting hole 311 is smaller than the gap between the rear sleeve 332 and the rear mounting hole 311 to improve the position accuracy of the rear positioning member 331. The rear locking block 334 is arranged at the lower part of the rear mounting hole 311, and the rear locking member 333 passes through the rear locking block 334 and the rear sleeve 332 to connect with the rear positioning member 331 to prevent the rear positioning member 331 from being separated from the rear mold core 31. The rear positioning member 331 is provided with a rear protruding portion protruding from the surface of the rear mold core 31 , and the rear protruding portion is matched with the first front positioning hole with a small gap, and further, the rear protruding portion is matched with the first front positioning hole with zero gap.

[0044] When the mold is opened for the first time, in order to prevent the semi-finished product 4 from being lifted up during the mold opening process, eight spring-pressing components 14 are arranged on the first front mold core 11 in this embodiment. The eight spring-pressing components 14 are arranged on both sides of the first cavity and corresponding to the first cavity, and the spring-pressing ends of the spring-pressing components 14 extend into the first cavity.

[0045] Specifically, the first front mold core 11 is provided with a spring lock installation hole 111, and the spring lock installation hole 111 includes a first hole section 1111, a second hole section 1112, a third hole section 1113 and a fourth hole section 1114 in sequence along its axial direction. The diameter of the first hole section 1111 is larger than the diameter of the second hole section 1112, so that a first abutment portion is formed between the first hole section 1111 and the second hole section 1112; the diameter of the third hole section 1113 is larger than the diameter of the second hole section 1112, so that a second abutment portion is formed between the second hole section 1112 and the third hole section 1113; the diameter of the fourth hole section 1114 is larger than the diameter of the third hole section 1113, so that a third abutment portion is formed between the third hole section 1113 and the fourth hole section 1114.

[0046] The spring-pressing assembly 14 includes a pressing block 141, a spring-locking connector 142 and a first elastic member 143. The pressing block 141 is disposed in the fourth hole section 1114, and the upper portion of the pressing block 141 can be upwardly restricted by the third abutting portion. The first end of the spring-locking connector 142 is disposed in the first hole section 1111, and the second end of the spring-locking connector 142 passes through the second hole section 1112 and the third hole section 1113 to connect with the pressing block 141. The spring-locking connector 142 is preferably a bolt, and the head of the bolt can be downwardly restricted by the first abutting portion. The first elastic member 143 elastically abuts between the end wall of the third hole section 1113 and the pressing block 141, that is, the two ends of the first elastic member 143 abut against the second abutting portion and the pressing block 141 respectively. The first elastic member 143 applies a downward driving force to the pressing block 141, so that when the mold is opened, the pressing block 141 can extend out of the fourth hole section 1114 to press the semi-finished product 4. When the mold is closed, the lower mold core can push the pressing block 141 to compress the first elastic member 143 upward, so that the pressing block 141 retracts into the fourth hole section 1114.

[0047] The pressing block 141 is provided with a groove 1411 on a side thereof facing the first cavity. The groove 1411 is communicated with the first cavity, that is, the groove 1411 constitutes a part of the first cavity.

[0048] The first front mold assembly 1 is provided with a first gate, which is connected to the first mold cavity and is used to pour molten plastic material into the first mold cavity. The second front mold assembly 2 is provided with a second gate, which is connected to the second mold cavity and is used to pour molten plastic material into the second mold cavity.

[0049] See also Figures 9 to 13 The second front mold assembly 2 is provided with a second front mold core 21, a second front mold frame 22 and four second precision positioning matching components 23. The second front mold core 21 is provided on the second front mold frame 22, and the four second precision positioning matching components 23 are respectively provided on the four sides of the second front mold core 21, and the second precision positioning matching components 23 and the third precision positioning matching components 33 are provided correspondingly.

[0050] The second front mold core 21 is connected to the rear mold core 31 to form a second cavity, and the semi-finished product 4 of the first injection molding is arranged in the second cavity. The third precision positioning fitting component 33 is connected to the second precision positioning fitting component 23 with a small clearance fit. The small clearance fit connection of this embodiment means that the gap between the two is smaller than the gap between the guide column of the front mold component and the guide hole of the rear mold component 3, so as to improve the fitting accuracy of the two. Furthermore, the small clearance fit connection can be a zero clearance fit connection. Specifically, the second front mold core 21 is provided with four second mounting holes, and the structure of the second mounting holes is the same as that of the first mounting holes 111, which will not be repeated here.

[0051] The second precision positioning matching component 23 includes a second front positioning member, a second front sleeve, a second front locking member and a second front locking block. The second front positioning member and the second front sleeve are both arranged in the second mounting hole, and the gap between the second front positioning member and the second mounting hole is smaller than the gap between the second front sleeve and the second mounting hole. The second front locking member passes through the second front locking block and the second front sleeve and is connected to the second front positioning member. The second front positioning member is provided with a second front positioning hole, and the second front positioning hole can be matched with the rear protrusion with a small gap. The structure of the second precision positioning matching component 23 is the same as that of the first precision positioning matching component 13, and will not be repeated here.

[0052] exist Figures 5 to 7 In the embodiment, four first pushers 121 are arranged on the first front mold frame 12, and the four first pushers 121 are arranged on the outer sides of the first front mold core 11 respectively, and the first pushers 121 protrude from the surface of the first front mold frame 12. A first inclined push surface is arranged on one side of the first pusher 121, and the first inclined push surface extends outwardly along the mold opening direction.

[0053] The rear mold assembly 3 also includes four slider assemblies 34, which are all arranged on the rear mold frame 32 and respectively arranged on the outer sides of the rear mold core 31. The first pusher 121 is arranged one by one with the slider assemblies 34. The slider assemblies 34 include a slider seat 341 and two inserts 342. The two inserts 342 are connected to the same side of the slider seat 341. One end of the insert 342 is connected to the slider seat 341, and the other end of the insert 342 extends into the first cavity or the second cavity. A second inclined push surface is arranged on the side of the slider seat 341 facing away from the insert 342, and the second inclined push surface cooperates with the first inclined push surface.

[0054] When the first front mold assembly 1 and the rear mold assembly 3 are molded together, the first pusher 121 can push the slide assembly 34 to move toward the first cavity along the vertical mold opening direction, so that one end of the insert 342 can extend into the first cavity or the second cavity.

[0055] See also Figures 9 to 13The second front mold assembly 2 includes a second front mold frame 22, and four first inclined tops 24 are arranged on the second front mold frame 22. The four first inclined tops 24 are arranged in a one-to-one correspondence with the four slider seats 341. When the second front mold assembly 2 is molded with the rear mold assembly 3, the first inclined tops 24 can push the slider assembly 34 to move in the direction perpendicular to the mold opening direction and away from the second cavity, so as to separate the insert 342 from the product. Specifically, the slider assembly 34 also includes two stoppers 343, two second elastic members 344 and two baffles 345. An insertion hole 3411 extending along the mold opening direction is provided in the slider seat 341, and through holes 3412 are provided on both sides of the insertion hole 3411, and the through holes 3412 are connected to the insertion hole 3411. The stopper 343 is disposed in the through hole 3412, the baffle 345 blocks the opening of the through hole 3412 at one end facing away from the insertion hole 3411, and the second elastic member 344 elastically abuts between the baffle 345 and the stopper 343, so that the first end of the stopper 343 can extend into the insertion hole 3411 and can slide in the through hole 3412. The first end of the stopper 343 is provided with an inclined surface that matches the first inclined top 24.

[0056] When the second front mold assembly 2 and the rear mold assembly 3 are closed, the first inclined top 24 is inserted into the insertion hole 3411, and the side surfaces of the first inclined top 24 respectively abut against the planes of the two blocks 343 and push the blocks 343 to retract a small distance into the through hole 3412, so that the first inclined top 24 can be easily inserted into place; when the second front mold assembly 2 and the rear mold assembly 3 are opened, the first inclined top 24 moves upward relatively, and pushes the blocks 343 and the sliding seat 341 to move along the vertical opening direction through the inclined surface, so as to separate the insert 342 from the product.

[0057] See also Fig. 9 , Fig.10 , Fig.12 and Fig.13 , the rear mold assembly 3 is also provided with an ejector plate 35 and a plurality of second inclined ejectors 36. The first end of the second inclined ejector 36 is arranged in the rear mold core 31, and the second end of the second inclined ejector 36 passes through the rear mold frame 32 and is connected to the ejector plate 35. The first end of the second inclined ejector 36 is provided with an end head 361, and the end head 361 extends into the first cavity and / or the second cavity. A U-shaped groove 3611 and a protrusion 3612 are provided on one side of the end head 361, and the protrusion 3612 is provided in the middle of the U-shaped groove 3611, and the U-shaped groove 3611 is connected with the first cavity or the second cavity to form a U-shaped glue inlet flow channel for molding the sprue material 5. When the second cavity is opened, the ejector plate 35 can drive the second inclined ejector 36 to move relative to the rear mold core 31 along the mold opening direction to lift the product and the sprue material 5 as above.

[0058] In order to ensure that the second inclined top 36 can smoothly lift up the nozzle material 5 and the product when the mold is opened to prevent the product from breaking, in this embodiment, arc grooves 3613 are provided on both sides of the protrusion 3612, and the arc grooves 3613 are connected to the U-shaped grooves 3611, and the extension direction of the arc grooves 3613 intersects with the moving direction of the second inclined top 36. When the second cavity is opened, the second inclined top 36 can drive the arc grooves 3613 and the nozzle material 5 in the U-shaped grooves 3611 to move together to eject the product and the nozzle material 5 at the same time. Moreover, the nozzle material 5 is gradually separated from the second inclined top 36 during the ejection process, which is convenient for the staff to take out the product and the nozzle material 5.

[0059] In summary, the utility model sets a third precision positioning matching component which is sequentially connected with the first precision positioning matching component and the second precision positioning matching component with a small gap, so that the front mold component and the rear mold component can be accurately matched regardless of the first injection molding or the second injection molding, which is beneficial to improving product precision; by setting a spring-pressing component, when the mold is opened for the first injection molding, the spring-pressing component can stably press the semi-finished product on the rear mold component, avoiding the semi-finished product being lifted up during the mold opening process and causing position displacement, thereby further improving product precision.

[0060] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-precision two-color molding mold for automotive accessories, comprising a first front mold component, a second front mold component and at least one rear mold component, characterized in that: The first front mold assembly is provided with a first front mold core, a plurality of first precision positioning matching components and a plurality of spring-pressing components, the first precision positioning matching components and the spring-pressing components are both provided on the first front mold core, and the plurality of first precision positioning matching components are respectively provided on the four sides of the first front mold core; The second front mold assembly is provided with a second front mold core and a plurality of second precision positioning matching components, and the plurality of second precision positioning matching components are respectively arranged on the periphery of the second front mold core; The rear mold assembly is provided with a rear mold core and a plurality of third precision positioning fitting components, and the plurality of third precision positioning fitting components are respectively arranged around the rear mold core, and the rear mold core is connected with the first front mold core and the second front mold core in sequence to form a first cavity and a second cavity in sequence, and the third precision positioning fitting components are connected with the first precision positioning fitting component and the second precision positioning fitting component in sequence with a small gap, and the spring-pressing end of the spring-pressing component extends into the first cavity.

2. The high-precision two-color molding die for automobile accessories according to claim 1, characterized in that: The first front mold core is provided with a plurality of first mounting holes; The first precision positioning matching assembly includes a first front positioning member, a first front sleeve, a first front locking member and a first front locking block. The first front positioning member and the first front sleeve are both arranged in the first mounting hole, and the gap between the first front positioning member and the first mounting hole is smaller than the gap between the first front sleeve and the first mounting hole. The first front locking member passes through the first front locking block and the first front sleeve and is connected to the first front positioning member. The first front positioning member is provided with a first front positioning hole. The rear mold core is provided with a plurality of rear mounting holes; The second precision positioning matching component includes a rear positioning piece, a rear sleeve, a rear locking piece and a rear locking block. The rear positioning piece and the rear sleeve are both arranged in the rear mounting hole, and the gap between the rear positioning piece and the rear mounting hole is smaller than the gap between the rear sleeve and the rear mounting hole. The rear locking piece passes through the rear locking block and the rear sleeve and is connected to the rear positioning piece. The rear positioning piece is provided with a rear protrusion protruding from the rear mold core, and the rear protrusion is matched with a small gap in the first front positioning hole.

3. The high-precision two-color molding die for automobile accessories according to claim 2, characterized in that: The second front mold core is provided with a plurality of second mounting holes; The second precision positioning matching component includes a second front positioning piece, a second front sleeve, a second front locking piece and a second front locking block. The second front positioning piece and the second front sleeve are both arranged in the second mounting hole, and the gap between the second front positioning piece and the second mounting hole is smaller than the gap between the second front sleeve and the second mounting hole. The second front locking piece passes through the second front locking block and the second front sleeve and is connected to the second front positioning piece. The second front positioning piece is provided with a second front positioning hole, and the second front positioning hole can be matched with the rear protrusion with a small gap.

4. The high-precision two-color molding die for automobile accessories according to claim 1, characterized in that: The first front mold core is provided with a spring lock installation hole, and the spring lock installation hole includes a first hole section, a second hole section, a third hole section and a fourth hole section in sequence along its axial direction; The spring-pressing assembly includes a pressing block, a spring-locking connector and a first elastic member, the pressing block is arranged in the fourth hole segment, the first end of the spring-locking connector is arranged in the first hole segment, the second end of the spring-locking connector passes through the second hole segment and the third hole segment to be connected to the pressing block, and the first elastic member elastically abuts between the end wall of the third hole segment and the pressing block, so that the pressing block can extend out and retract into the fourth hole segment.

5. The high-precision two-color molding die for automobile accessories according to claim 4, characterized in that: The pressing block is provided with a groove on a side thereof facing the first cavity, and the groove is communicated with the first cavity.

6. The high-precision two-color molding die for automobile accessories according to claim 1, characterized in that: The first front mold assembly further includes a first front mold frame, on which a plurality of first pushers are disposed, and the plurality of first pushers are respectively disposed on the outer sides of four sides of the first front mold core; The rear mold assembly also includes a rear mold frame and a plurality of slide assemblies, the plurality of slide assemblies are all arranged on the rear mold frame and are respectively arranged on the outer sides of the rear mold core, the slide assembly includes an insert and a slide seat, one end of the insert is connected to the slide seat, and the other end of the insert extends into the first cavity or the second cavity; When the first front mold assembly is molded with the rear mold assembly, the first pushing member can push the slide assembly to move toward the first cavity along a direction perpendicular to the mold opening direction.

7. The high-precision two-color molding die for automobile accessories according to claim 6, characterized in that: The second front mold assembly includes a second front mold frame, and the second front mold frame is provided with a plurality of first inclined tops, and the first inclined tops are arranged corresponding to the slide seat; When the second front mold assembly is molded with the rear mold assembly, the first inclined top can push the slide assembly to move in a direction perpendicular to the mold opening direction and away from the second cavity.

8. The high-precision two-color molding die for automobile accessories according to claim 7, characterized in that: The slide assembly also includes a block, a second elastic member and a baffle. An insertion hole extending along the mold opening direction is provided in the slide seat, and a through hole is provided in communication on at least one side of the insertion hole. The block is arranged in the through hole, and the baffle blocks the outer end opening of the through hole. The second elastic member elastically abuts between the baffle and the block, so that the first end of the block can extend into the insertion hole and can slide in the through hole. The first end of the block is provided with an inclined surface cooperating with the first inclined top, so that the first inclined top can drive the slide seat and the insert to move through the block.

9. The high-precision two-color molding die for automobile accessories according to claim 1, characterized in that: The rear mold assembly is also provided with an ejector plate and a plurality of second inclined ejectors, wherein the first ends of the second inclined ejectors are arranged in the rear mold core, and the second ends of the second inclined ejectors are connected to the ejector plate; The first end of the second inclined ejector is provided with an end head portion, and the end head portion extends into the first cavity and / or the second cavity. A U-shaped groove and a protrusion portion are provided on one side of the end head portion, and the protrusion portion is arranged in the middle of the U-shaped groove. The U-shaped groove is connected with the first cavity or the second cavity to form a U-shaped glue inlet channel. When the second cavity is opened, the ejector plate can drive the second inclined ejector to move relative to the rear mold core along the mold opening direction.

10. The high-precision two-color molding die for automobile accessories according to claim 9, characterized in that: Arc grooves are also provided on both sides of the protrusion, the arc grooves are connected to the U-shaped grooves, and the extending direction of the arc grooves intersects with the moving direction of the second inclined top; When the second cavity is opened, the second inclined top can drive the sprue material in the arc groove and the U-shaped groove to move together.

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