A forming die for automobile tail lamp lens

Abstract

The utility model relates to a kind of forming mould of automobile tail light lamp glass, including four sub-quadrant mould, first quadrant mould, second quadrant mould, third quadrant mould, fourth quadrant mould respectively;Still including first color hot runner assembly and second color hot runner assembly, first connecting positioning mechanism and second connecting positioning mechanism are equipped between the contact surface of two adjacent sub-quadrant mould;The beneficial effects of the utility model are that compared with the two-color mould of long body, the structure consisting of four sub-quadrant mould can reduce the use amount of mould material, can make full use of the mould space in injection molding machine, the size of each sub-quadrant mould is relatively smaller, manufacturing difficulty and cost are also relatively lower, and the processing of mould is also facilitated simultaneously.

Description

Technical Field

[0001] This utility model relates to an improvement of a two-color injection molding die. Background Technology

[0002] Two-color injection molding molds are used to manufacture two-color plastic products. The principle involves injecting two different colors or materials of plastic, either sequentially or simultaneously, into the cavity of the same mold, allowing them to bond together to form a complete product. This process can give plastic products a unique appearance while combining the performance advantages of different plastics, improving both the functionality and aesthetics of the product.

[0003] Two-color injection molding dies are widely used in industries such as electronics, automotive, daily necessities, and toys. For example, products such as mobile phone casings, automotive interior parts, and toothbrush handles can all achieve unique appearances and functions through two-color injection molding.

[0004] This type of two-color injection molding process consists of two stages. In the first injection stage, the mold closes, and the injection molding machine injects a portion of the first type of plastic into the mold cavity through the gating system of the upper mold, forming part of the product shape. After injection, the plastic cools and solidifies within the cavity. The lower mold then moves to switch the upper cavity. Driven by the injection molding machine, the lower mold moves or rotates to position the already molded portion of the plastic product, preparing it for the second injection. For example, the lower mold can rotate 180° to transfer the portion formed in the first injection into another cavity. In the second injection stage, the injection molding machine injects a second type of plastic into the other part of the mold cavity, combining it with the portion formed in the first injection to form a complete two-color product. After the second injection, the plastic cools and solidifies again. Finally, the mold opens, and the ejector mechanism pushes the molded two-color product out of the mold.

[0005] The movement and rotation of the lower mold require a certain amount of space, thus placing high demands on the installation space of the injection molding machine and the overall dimensions of the mold. In particular, traditional two-color molds are often equivalent to two sets of molds stacked one on top of the other, with a length twice that of a regular mold. However, the mold size that an injection molding machine can accommodate is limited. These types of two-color molds often require the use of a larger mold, wasting the effective utilization rate of the injection molding machine. Utility Model Content

[0006] To overcome the shortcomings of current dual-color molding dies for automotive taillights, which occupy a large space on injection molding machines, this utility model provides a molding die for automotive taillights.

[0007] The technical solution of this utility model to solve its technical problem is: a molding die for automotive taillight glass, comprising four sub-quadrant molds, namely a first quadrant mold, a second quadrant mold, a third quadrant mold, and a fourth quadrant mold; the sub-quadrant molds, from top to bottom, are a top plate, a hot runner mounting plate, an upper template, a lower template, a mold base, and a bottom plate, and also include a first color hot runner assembly and a second color hot runner assembly, the inlet of the first color hot runner assembly being located on the connecting surface of the first quadrant mold and the second quadrant mold, and the upper template of the first quadrant mold being provided with a first nozzle assembly communicating with the mold cavity. The hot runner assembly is connected to the first nozzle group through the first material channel. The upper template of the second quadrant mold is provided with a second nozzle group that connects to the mold cavity. The hot runner assembly is connected to the second nozzle group through the second material channel. The inlet of the hot runner assembly is located on the connecting surface of the third quadrant mold and the fourth quadrant mold. The upper template of the third quadrant mold is provided with a third nozzle group that connects to the mold cavity. The hot runner assembly is connected to the third nozzle group through the third material channel. The upper template of the fourth quadrant mold is provided with a fourth nozzle group that connects to the mold cavity. The hot runner assembly is connected to the fourth nozzle group through the fourth material channel. A first connecting positioning mechanism and a second connecting positioning mechanism are provided between the contact surfaces of the two adjacent sub-quadrant molds. The first connecting and positioning mechanism includes a protrusion mounting groove on the upper template and a concave mounting groove on the lower template. The bottom surfaces of the protrusion mounting groove and the concave mounting groove are provided with fixing screw holes for the first connecting mechanism. A protrusion is installed in the protrusion mounting groove of the upper template in the adjacent quadrant. The left side of the protrusion is screwed and fixed to the upper template of the left sub-quadrant mold, and the right side of the protrusion is screwed and fixed to the upper template of the right sub-quadrant mold. A concave block is installed in the concave mounting groove of the lower template in the adjacent quadrant. The left side of the concave block is screwed and fixed to the lower template of the left sub-quadrant mold, and the right side of the concave block is screwed and fixed to the lower template of the right sub-quadrant mold. When the mold is closed, the protrusion is inserted into the concave block. The second connecting and positioning mechanism includes a pin block. Each upper template of an adjacent quadrant is provided with a half upper pin groove. The bottom surface of the upper pin groove is provided with a pin block mounting screw hole. When the pin block is screwed and fixed, the upper left end of the pin block is fixed in the secondary upper pin groove on the upper template of the left sub-quadrant mold, and the upper right end of the pin block is fixed in the upper pin groove on the upper template of the right sub-quadrant mold. The lower template of the adjacent quadrant is also provided with a lower pin groove, and the lower end of the pin block is inserted into the lower pin groove.

[0008] To achieve better positioning results, the first connecting positioning mechanism is adjacent to the second connecting positioning mechanism, with the second connecting positioning mechanism on the outside and the first connecting positioning mechanism on the inside; the protrusion mounting groove is opened on the bottom surface of the upper pin groove, and the concave mounting groove is opened on the bottom surface of the lower pin groove.

[0009] To further increase the fixing firmness of the lower templates in adjacent quadrants, an external fixing block is also included. Each of the two lower templates in adjacent quadrants is provided with an external fixing block fixing hole, and the external fixing block is screwed and fixed in the external fixing block fixing hole of the two lower templates in adjacent quadrants.

[0010] To facilitate fine-tuning of the pin's positioning effect, the lower part of the pin is provided with positioning plate mounting grooves on both sides, and a positioning plate is installed in the positioning plate mounting grooves.

[0011] In a preferred embodiment, the positioning plate is installed in the positioning plate mounting groove by positioning plate fixing screws.

[0012] Furthermore, the side of the lower pin groove is also provided with an outer positioning plate mounting groove, and an outer positioning plate is screwed into the outer positioning plate mounting groove; the positioning plate is positioned in contact with the outer positioning plate.

[0013] To further enhance the connection between the upper templates, each of the two upper template mating surfaces in adjacent quadrants is provided with a half-connecting plate groove and a connecting plate. The left side of the connecting plate is screwed and fixed to the left upper template, and the right side of the connecting plate is screwed and fixed to the right upper template.

[0014] In use, the top plate and upper template are fixed on the injection molding machine, and the bottom plate is mounted on a rotating device with the center of the four sub-quadrant molds as the pivot, so that the lower template can rotate.

[0015] Two-color injection molding is divided into a first-color injection process and a second-color injection process. During the first-color injection process, the upper and lower molds of the four sub-quadrant molds are in the correct position and closed. That is, the upper mold of the first quadrant mold is closed on the lower mold of the first quadrant mold, and the same is true for the second quadrant mold. The first type of plastic is injected into a part of the mold cavity through the first-color hot runner assembly of the upper mold by the first injection molding machine to form a part of the shape of the product.

[0016] After injection, the plastic cools and solidifies within the cavity. The lower mold rotates 180° under the action of the rotating device, and the product after the first color injection molding is transferred to the lower mold of the third and fourth quadrant molds, that is, the upper mold plates of the first and second quadrant molds cover the lower mold plates of the third and fourth quadrant molds.

[0017] In the second-color injection molding process, the molding machine injects the second-color plastic into another part of the upper mold cavity through the second-color hot runner assembly, combining it with the part formed in the first injection molding to form a complete two-color automotive taillight lens product. After the second injection, the plastic cools and solidifies again. Finally, the mold opens, and the ejector mechanism pushes the formed automotive taillight lens out of the mold. Simultaneously, during this second-color injection molding process, two other sets of sub-quadrant molds undergo another set of first-color injection molding through the first-color hot runner assembly, and the two molding processes are repeated cyclically.

[0018] The beneficial effects of this utility model are as follows: 1. Compared with long-bodied two-color molds, this structure composed of four sub-quadrant molds can reduce the amount of mold material used, make full use of the mold space in the injection molding machine, and the size of each sub-quadrant mold is relatively small, resulting in lower manufacturing difficulty and cost, while also facilitating mold processing. 2. If a sub-quadrant mold, such as the first quadrant mold, malfunctions or is damaged, only the first and third quadrant molds need to be stopped for individual repair or replacement without affecting the normal use of other molds. This greatly shortens mold repair time, reduces repair costs, and also reduces production downtime caused by mold malfunctions. 3. By adopting the first and second connecting positioning mechanisms, both positioning mechanisms simultaneously have the characteristic of connecting and reinforcing adjacent sub-quadrant molds, resulting in a compact structure and improved overall mold structure strength; while the external fixing block and connecting block further strengthen the connection strength of the upper and lower templates of adjacent sub-quadrant molds. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the present invention with the first quadrant mold and the third quadrant mold hidden.

[0020] Figure 2 This is another schematic diagram of the present invention with the first quadrant mold and the third quadrant mold hidden.

[0021] Figure 3 This is an enlarged view of point A.

[0022] Figure 4 This is an installation diagram of the second connecting and positioning mechanism of this utility model.

[0023] Figure 5 This is an installation diagram of the first connecting and positioning mechanism, the second connecting and positioning mechanism, the outer fixing block, and the connecting plate of this utility model.

[0024] Figure 6 This is a schematic diagram of the present invention after the top plate, the first quadrant mold, and the third quadrant mold have been removed. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] Example 1 Combined with appendix Figures 1 to 6 A molding die for automotive taillight glass includes four sub-quadrant molds: a first quadrant mold 1, a second quadrant mold 2, a third quadrant mold 3, and a fourth quadrant mold 4. From top to bottom, each sub-quadrant mold comprises a top plate 5, a hot runner mounting plate 6, an upper template 7, a lower template 8, a mold base 9, and a bottom plate 10. The die also includes a first-color hot runner assembly 11 and a second-color hot runner assembly 12. The inlet of the first-color hot runner assembly 11 is located on the connecting surface of the first quadrant mold 1 and the second quadrant mold 2. The upper template 7 of the first quadrant mold 1 has a first nozzle assembly 14 communicating with the mold cavity. The first-color hot runner assembly 11 is connected via a first material channel 13. The first nozzle group 14 is provided, and the upper template 7 of the second quadrant mold 2 is provided with a second nozzle group 15 that connects to the mold cavity. The first color hot runner assembly 11 is connected to the second nozzle group 15 through the second material channel 16. The inlet of the second color hot runner assembly 12 is provided on the connecting surface of the third quadrant mold 3 and the fourth quadrant mold 4. The upper template of the third quadrant mold 3 is provided with a third nozzle group 17 that connects to the mold cavity. The second color hot runner assembly 12 is connected to the third nozzle group 17 through the third material channel 18. The upper template of the fourth quadrant mold 4 is provided with a fourth nozzle group 19 that connects to the mold cavity. The second color hot runner assembly 12 is connected to the fourth nozzle group 19 through the fourth material channel 20. A first connecting and positioning mechanism 21 and a second connecting and positioning mechanism 22 are provided between the contact surfaces of the two adjacent sub-quadrant molds; The first connecting and positioning mechanism 21 includes a protrusion mounting groove 23 on the upper template 7 and a concave mounting groove 24 on the lower template 8. The bottom surfaces of the protrusion mounting groove 23 and the concave mounting groove 24 are provided with first connecting mechanism fixing screw holes. A protrusion 25 is installed in the protrusion mounting groove 23 of the upper template 7 of the adjacent quadrant. The left side of the protrusion 25 is screwed and fixed to the upper template 7 of the left sub-quadrant mold, and the right side of the protrusion 25 is screwed and fixed to the upper template 7 of the right sub-quadrant mold. A concave block 26 is installed in the concave mounting groove 24 of the lower template 8 of the adjacent quadrant. The left side of the concave block 26 is screwed and fixed to the lower template 8 of the left sub-quadrant mold, and the right side of the concave block 26 is screwed and fixed to the lower template 8 of the right sub-quadrant mold. When the mold is closed, the protrusion 25 is inserted into the concave block 26. The second connecting and positioning mechanism 22 includes a pin block 27. Each upper template 7 in an adjacent quadrant is provided with a half upper pin groove 28. The bottom surface of the upper pin groove 28 is provided with a pin block mounting screw hole 29. When the pin block 27 is screwed and fixed, the upper left end of the pin block 27 is fixed in the half upper pin groove 28 on the upper template 7 of the left sub-quadrant mold, and the upper right end of the pin block 27 is fixed in the upper pin groove 28 on the upper template 7 of the right sub-quadrant mold. The lower template 8 in the adjacent quadrant is also provided with a lower pin groove 30, and the lower end of the pin block 27 is inserted into the lower pin groove 30.

[0027] To achieve better positioning results, the first connecting positioning mechanism 21 is positioned adjacent to the second connecting positioning mechanism 22, with the second connecting positioning mechanism 22 on the outside and the first connecting positioning mechanism 21 on the inside; the protrusion mounting groove 23 is opened on the bottom surface of the upper pin groove 28, and the concave mounting groove 24 is opened on the bottom surface of the lower pin groove 30.

[0028] To further increase the fixing firmness of the lower template 8 in adjacent quadrants, an external fixing block 31 is also included. Each of the two lower templates 8 in adjacent quadrants is provided with an external fixing block fixing hole 32. The external fixing block 31 is screwed and fixed in the external fixing block fixing hole 32 of the two lower templates 8 in adjacent quadrants.

[0029] To facilitate fine-tuning of the positioning effect of the pin 27, the lower part of the pin 27 is provided with positioning plate mounting grooves on both sides, and a positioning plate 33 is installed in the positioning plate mounting grooves.

[0030] In a preferred embodiment, the positioning plate 33 is installed in the positioning plate mounting groove by positioning plate fixing screws 34.

[0031] Furthermore, the lower pin groove 30 is also provided with an outer positioning plate mounting groove on its side, and an outer positioning plate 35 is screwed into the outer positioning plate mounting groove; the positioning plate 33 is positioned in contact with the outer positioning plate 35.

[0032] To further enhance the connection between the upper templates 7, each of the two upper templates 7 in adjacent quadrants is provided with a half-connecting plate groove 36 and a connecting plate 37. The left part of the connecting plate 37 is screwed and fixed to the left upper template 7, and the right part of the connecting plate 37 is screwed and fixed to the right upper template 7.

[0033] In this embodiment, the top plate 5 and the upper template 7 are fixed on the injection molding machine, and the bottom plate 10 is mounted on a rotating device with the center position of the four sub-quadrant molds as the pivot, so that the lower template 8 can rotate.

[0034] Two-color injection molding is divided into a first-color injection process and a second-color injection process. During the first-color injection process, the upper and lower molds of the four sub-quadrant molds are in the correct position and closed. That is, the upper mold of the first quadrant mold 1 is closed on the lower mold of the first quadrant mold 1, and the same is true for the second quadrant mold 2. The first type of plastic is injected into a part of the mold cavity through the first-color hot runner assembly 11 of the upper mold in the first injection molding machine to form a part of the shape of the product.

[0035] After injection, the plastic cools and solidifies in the cavity. The lower mold rotates 180° under the action of the rotating device, and the product after the first color injection molding is transferred to the lower mold of the third quadrant mold 3 and the fourth quadrant mold 4. That is, the upper template 7 of the first quadrant mold 1 and the second quadrant mold 2 covers the lower template 8 of the third quadrant mold 3 and the fourth quadrant mold 4.

[0036] In the second-color injection molding process, the molding machine injects the second-color plastic into another part of the upper mold cavity through the second-color hot runner assembly 12, combining it with the part formed in the first injection molding to form a complete two-color automotive taillight glass product. After the second injection, the plastic cools and solidifies again. Finally, the mold opens, and the ejector mechanism pushes the formed automotive taillight glass out of the mold. Simultaneously, during this second-color injection molding process, two other sets of sub-quadrant molds undergo another set of first-color injection molding through the first-color hot runner assembly 11, and the two molding processes are repeated cyclically.

[0037] The beneficial effects of this utility model are as follows: 1. Compared with long-bodied two-color molds, this structure composed of four sub-quadrant molds can reduce the amount of mold material used, make full use of the mold space in the injection molding machine, and the size of each sub-quadrant mold is relatively small, resulting in lower manufacturing difficulty and cost, while also facilitating mold processing. 2. If a sub-quadrant mold, such as the first quadrant mold, malfunctions or is damaged, only the first and third quadrant molds need to be stopped for individual repair or replacement without affecting the normal use of other molds. This greatly shortens mold repair time, reduces repair costs, and also reduces production downtime caused by mold malfunctions. 3. By adopting the first and second connecting positioning mechanisms, both positioning mechanisms simultaneously have the characteristic of connecting and reinforcing adjacent sub-quadrant molds, resulting in a compact structure and improved overall mold structure strength; while the external fixing block and connecting block further strengthen the connection strength of the upper and lower templates of adjacent sub-quadrant molds.

Claims

1. A molding die for automotive taillight glass, characterized in that: The system includes four sub-quadrant molds: the first quadrant mold, the second quadrant mold, the third quadrant mold, and the fourth quadrant mold. From top to bottom, each sub-quadrant mold consists of a top plate, a hot runner mounting plate, an upper template, a lower template, a mold base, and a bottom plate. It also includes a first-color hot runner assembly and a second-color hot runner assembly. The inlet of the first-color hot runner assembly is located on the connecting surface of the first and second quadrant molds. The upper template of the first quadrant mold has a first nozzle assembly that connects to the mold cavity. The first-color hot runner assembly connects to the first material channel via a first material channel. The upper template of the second quadrant mold is provided with a second nozzle assembly that connects to the mold cavity. The first color hot runner assembly is connected to the second nozzle assembly through the second material channel. The inlet of the second color hot runner assembly is provided on the connecting surface of the third quadrant mold and the fourth quadrant mold. The upper template of the third quadrant mold is provided with a third nozzle assembly that connects to the mold cavity. The second color hot runner assembly is connected to the third nozzle assembly through the third material channel. The upper template of the fourth quadrant mold is provided with a fourth nozzle assembly that connects to the mold cavity. The second color hot runner assembly is connected to the fourth nozzle assembly through the fourth material channel. A first connecting positioning mechanism and a second connecting positioning mechanism are provided between the contact surfaces of the two adjacent sub-quadrant molds. The first connecting and positioning mechanism includes a protrusion mounting groove on the upper template and a concave mounting groove on the lower template. The bottom surfaces of the protrusion mounting groove and the concave mounting groove are provided with fixing screw holes for the first connecting mechanism. A protrusion is installed in the protrusion mounting groove of the upper template in the adjacent quadrant. The left side of the protrusion is screwed and fixed to the upper template of the left sub-quadrant mold, and the right side of the protrusion is screwed and fixed to the upper template of the right sub-quadrant mold. A concave block is installed in the concave mounting groove of the lower template in the adjacent quadrant. The left side of the concave block is screwed and fixed to the lower template of the left sub-quadrant mold, and the right side of the concave block is screwed and fixed to the lower template of the right sub-quadrant mold. When the mold is closed, the protrusion is inserted into the concave block. The second connecting and positioning mechanism includes a pin block. Each upper template of an adjacent quadrant is provided with a half upper pin groove. The bottom surface of the upper pin groove is provided with a pin block mounting screw hole. When the pin block is screwed and fixed, the upper left end of the pin block is fixed in the secondary upper pin groove on the upper template of the left sub-quadrant mold, and the upper right end of the pin block is fixed in the upper pin groove on the upper template of the right sub-quadrant mold. The lower template of the adjacent quadrant is also provided with a lower pin groove, and the lower end of the pin block is inserted into the lower pin groove.

2. The molding die for the automotive taillight glass according to claim 1, characterized in that: The first connecting positioning mechanism is adjacent to the second connecting positioning mechanism, with the second connecting positioning mechanism on the outside and the first connecting positioning mechanism on the inside; the protrusion mounting groove is formed on the bottom surface of the upper pin groove, and the concave mounting groove is formed on the bottom surface of the lower pin groove.

3. The molding die for the automotive taillight glass according to claim 1, characterized in that: It also includes an external fixing block, with an external fixing block fixing hole provided on each of the two lower templates in adjacent quadrants. The external fixing block is screwed and fixed in the external fixing block fixing hole of the two lower templates in adjacent quadrants.

4. The molding die for the automotive taillight glass according to claim 1, characterized in that: The lower part of the pin block has recessed positioning plate mounting grooves on both sides, and a positioning plate is installed in the positioning plate mounting groove.

5. The molding die for the automotive taillight glass according to claim 4, characterized in that: The positioning plate is installed in the positioning plate mounting slot by positioning plate fixing screws.

6. The molding die for the automotive taillight glass according to claim 5, characterized in that: The lower pin groove is also provided with an outer positioning plate mounting groove, and an outer positioning plate is screwed into the outer positioning plate mounting groove; the positioning plate is positioned in contact with the outer positioning plate.

7. The molding die for the automotive taillight glass according to claim 1, characterized in that: Each of the two upper template mating surfaces in adjacent quadrants is also provided with a half-set connecting plate groove and a connecting plate. The left part of the connecting plate is screwed and fixed on the left upper template, and the right part of the connecting plate is screwed and fixed on the right upper template.

8. The molding die for the automotive taillight glass according to claim 7, characterized in that: The connecting plate consists of several parts.

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