Forming die for automobile decorative cylinder cover

Abstract

The utility model discloses an automobile decorative cylinder cover forming die, which comprises a lower die assembly, a lower die assembly, an upper die assembly, an upper die assembly and a lower die assembly, the lower die assembly comprises a lower die plate and a lower die block, and a forming die core is arranged on the top surface of the lower die block; the upper die assembly comprises an upper die plate and an upper die block, and a forming die cavity is formed in the bottom face of the upper die block; the material injection assembly comprises a material injection part, a main sprue bush and a plurality of branch sprue bushes, the material injection part is provided with a telescopic driving device, and a valve needle is arranged at the telescopic end of the telescopic driving device; and the side core-pulling assembly comprises a side pulling piece, a side core-pulling body and a translation driving device, and when the side pulling piece translates, the side core-pulling body is driven to extend into or be pulled out of the forming die cavity so as to form the outer convex hole. According to the automobile decorative cylinder cover forming mold, the injection molding mode is optimized, and the side core-pulling assembly is adopted, so that the forming process of an automobile decorative cylinder cover is effectively improved, the defect occurrence rate is reduced, the product quality is improved, and the service life of the product is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a molding mold for automotive decorative cylinder heads. Background Technology

[0002] A decorative cylinder head is a component installed on a car engine. Its main function is to decorate or add to the cylinder head, and to a certain extent, it can prevent the cylinder head surface from directly contacting external dust, moisture, oil, etc., reducing the corrosion and wear caused by these impurities, thereby extending the service life of the cylinder head.

[0003] Automotive decorative cylinder heads are mostly manufactured using injection molding. The top of the cylinder head also requires the molding of an outwardly protruding, angled hole. Furthermore, the cylinder head has a complex shape and a large area; therefore, the molding of automotive decorative cylinder heads typically uses multiple gates for injection. However, when multiple gates inject material simultaneously, the molten plastic flows from various directions and converges within the cavity. The flow of the molten plastic within the cavity conflicts with each other, easily causing defects such as weld lines, flow marks, and bubbles, affecting product quality and service life. Utility Model Content

[0004] The purpose of this utility model is to design an automotive decorative cylinder head molding die to overcome the shortcomings of the above-mentioned technologies. By optimizing the injection molding method and adopting a side core-pulling component, the molding process of automotive decorative cylinder heads is effectively improved, the defect rate is reduced, and product quality and service life are enhanced.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a molding die for an automotive decorative cylinder head, comprising:

[0006] The lower mold assembly includes a lower template and a lower module, the lower module is disposed on the top surface of the lower template, and the top surface of the lower module is provided with a forming core;

[0007] The upper mold assembly includes an upper template and an upper module. The upper module is disposed on the bottom surface of the upper template, and the bottom surface of the upper module is provided with a forming cavity. The forming cavity and the forming core cooperate with each other to form a cavity for forming an automotive decorative cylinder head.

[0008] The injection assembly includes an injection element, a main sprue bushing, and several branch sprue bushings distributed around the cavity. The injection element is located between the upper mold plate and the upper module. The injection element has a runner groove inside. The main sprue bushing and each of the branch sprue bushings are connected to the runner groove. A nozzle is connected to the bottom of each branch sprue bushing. The nozzle cooperates with the inner wall of the molding cavity. A telescopic drive device is positioned on the injection element relative to the branch sprue bushings. The telescopic end of the telescopic drive device is provided with a valve needle inserted into the nozzle.

[0009] A side core-pulling assembly includes a side core-pulling component, a side core-pulling body, and a translation drive device. The side core-pulling component is slidably connected to the interior of the upper module. The side core-pulling body and the side core-pulling component are linked and cooperated. The translation end of the translation drive device is connected to the side core-pulling component, so that when the side core-pulling component is translated, it drives the side core-pulling body to extend into or withdraw from the molding cavity to form an external convex hole.

[0010] Preferably, it also includes a controller, which is disposed on the side wall of the upper module, and the translation drive device and each of the telescopic drive devices are electrically connected to and controlled by the controller.

[0011] Preferably, the upper module has a docking groove for the insertion of the sprue sleeve, each docking groove extends through to the inner wall of the molding cavity, and a docking hole for the nozzle to be inserted is provided between the docking groove and the molding cavity.

[0012] Preferably, the outer wall of the sprue sleeve is fitted with a protective shell, which is inserted into the docking groove. The inner wall of the protective shell is clearance-fitted with the outer wall of the sprue sleeve and is provided with a heating wire surrounding the sprue sleeve. The heating wire is electrically connected to and controlled by the controller.

[0013] Preferably, the injection component has two heating rings coaxially arranged at a position relative to the sprue sleeve. The two heating rings are respectively embedded in the top and bottom surfaces of the injection component, and the heating rings are electrically connected to and controlled by the controller.

[0014] Preferably, at least one alignment structure is provided between the upper template and the lower template. The alignment structure includes an alignment post and an alignment groove, with the alignment post inserted into the alignment groove. The alignment post is disposed on the bottom surface of the upper template, and the alignment groove is formed on the top surface of the upper template. Alternatively, the alignment post is disposed on the top surface of the lower template, and the alignment groove is formed on the bottom surface of the upper template.

[0015] Preferably, the top surface of the injection component is provided with a first mounting groove for the telescopic drive device to be inserted, and the bottom inner wall of the first mounting groove is provided with a guide hole for the valve needle to be inserted.

[0016] Preferably, the bottom surface of the injection component is provided with a second mounting groove for the top surface of the injection port sleeve to be inserted into. The second mounting groove is connected to the flow channel groove, and the valve needle passes through the second mounting groove.

[0017] Preferably, the upper module has a sliding groove for the side pull member to slide and connect. The inner sidewall of the sliding groove has an inclined surface that is inclined toward the molding cavity. The inclined surface abuts against the opposite side of the side pull member. The inclined surface has a through-hole for the side pull core body to slide and connect. The side pull member has an inclined guide groove extending along the inclined surface. The bottom of the side pull core body extends into the molding cavity to form an external protruding hole. The top of the side pull core body extends out of the inclined guide hole and is provided with an inclined guide block. The inclined guide block is slidably connected in the inclined guide groove.

[0018] Preferably, two square irons are symmetrically arranged between the lower template and the upper template, and a top plate is slidably connected between the two square irons. The top plate is provided with top pins distributed around the forming mold core. The lower template has a through-hole for the top pins to be inserted into, and the end of the top pin is engaged with the forming mold core.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] This utility model discloses a molding die for automotive decorative cylinder heads. The injection assembly is designed with a main gate and multiple sub-gates. The molten material from the main gate flows into the runner channel inside the injection component, and then is injected into the cavity through the sub-gates. Through the telescopic drive devices on the injection component, the nozzles are controlled to inject material in sequence, achieving precise and orderly flow of the material. Driven by the translation drive device, the side core puller moves in and out of the mold cavity during translation, thereby completing the molding and demolding of the external protrusion hole. This molding die, by optimizing the injection method and adopting the side core puller assembly, effectively improves the molding process of automotive decorative cylinder heads, reduces the defect rate, and improves product quality and service life. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the molding die in the embodiment;

[0022] Figure 2 This is a cross-sectional view of the molding die in the embodiment;

[0023] Figure 3 This is a schematic diagram of the lower mold component in the embodiment;

[0024] Figure 4 This is a cross-sectional view of the lower mold component in the embodiment;

[0025] Figure 5 This is a schematic diagram of the upper mold component in the embodiment;

[0026] Figure 6 This is a cross-sectional view of the upper mold component in the embodiment;

[0027] Figure 7 This is a cross-sectional view of the side core-pulling assembly in the embodiment. Figure 1 ;

[0028] Figure 8 This is a cross-sectional view of the side core-pulling assembly in the embodiment. Figure 2 ;

[0029] Figure 9 This is a schematic diagram of the side core-pulling assembly in the embodiment;

[0030] Figure 10 This is a schematic diagram of the injection assembly in the embodiment;

[0031] Figure 11 This is a schematic diagram of the structure of the automotive decorative cylinder head formed by the molding die in the embodiment.

[0032] In the diagram: 1. Automotive decorative cylinder head; 101. Outer protrusion hole; 2. Lower mold assembly; 21. Lower template; 22. Lower module; 3. Molding core; 4. Upper mold assembly; 41. Upper template; 42. Upper module; 5. Molding cavity; 6. Cavity; 7. Injection assembly; 71. Injection part; 72. Main sprue bushing; 73. Sub-sprue bushing; 8. Runner; 9. Nozzle; 10. Telescopic drive device; 11. Valve needle; 12. Side core pulling assembly; 121. Side core pulling part; 122. Side core pulling body; 123. Translation drive device; 13. Controller; 14. Connecting groove ; 15. Docking hole; 16. Protective shell; 17. Heating wire; 18. Heating ring; 19. Alignment structure; 191. Alignment post; 192. Alignment groove; 20. First mounting groove; 23. Guide hole; 24. Second mounting groove; 25. Sliding groove; 26. Inclined surface; 27. Inclined guide hole; 28. Inclined guide groove; 29. ​​Inclined guide block; 30. Square iron; 31. Ejector plate; 32. Ejector pin; 33. Ejector hole; 34. Guide structure; 341. Guide block; 342. Guide groove; 35. Guide post; 36. Guide sleeve; 37. Stroke post; 38. Stroke hole. Detailed Implementation

[0033] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0034] refer to Figures 1 to 10A molding die for an automotive decorative cylinder head 1 includes a lower mold assembly 2, an upper mold assembly 4, an injection assembly 7, and a controller 13. The lower mold assembly 2 includes a lower template 21 and a lower module 22. The lower module 22 is disposed on the top surface of the lower template 21. Two square irons 30 are symmetrically arranged between the lower template 21 and the upper template 41. The two square irons 30 fix the lower template 21 and the upper template 41 together. A molding core 3 is disposed on the top surface of the lower module 22.

[0035] The upper mold assembly 4 includes an upper template 41 and an upper module 42. The upper module 42 is disposed on the bottom surface of the upper template 41. At least one alignment structure 19 is provided between the upper template 41 and the lower template 21. The alignment structure 19 includes an alignment post 191 and an alignment groove 192. The alignment post 191 is inserted into the alignment groove 192 and is disposed on the bottom surface of the upper template 41. The alignment groove 192 is formed on the top surface of the upper module 42, thereby realizing the fixed connection between the upper module 42 and the upper template 41. A forming cavity 5 is provided on the bottom surface of the upper module 42.

[0036] A guide structure 34 is provided around the opposite sides of the upper module 42 and the lower module 22. The guide structure 34 includes a guide block 341 and a guide groove 342. A guide post 35 is provided on the guide block 341, and a guide sleeve 36 is provided in the guide groove 342. The guide block 341 is inserted into the guide groove 342, and the guide post 35 is inserted into the guide sleeve 36. The guide block 341 is located on the top surface of the lower module 22, and the guide groove 342 is opened on the bottom surface of the upper module 42 to guide the mold parting and mold closing actions between the upper module 42 and the lower module 22.

[0037] The injection assembly 7 includes an injection element 71, a main sprue sleeve 72, and several sub-sprue sleeves 73 distributed around the cavity 6. The injection element 71 is located between the upper template 41 and the upper module 42. The injection element 71 has a runner groove 8 inside. The main sprue sleeve 72 and each sub-sprue sleeve 73 are connected to the runner groove 8. The bottom of each sub-sprue sleeve 73 is connected to a nozzle 9. The upper module 42 has a docking groove 14 for the sub-sprue sleeves 73 to be inserted into. Each docking groove 14 extends to the inner wall of the molding cavity 5. A docking hole 15 for the nozzle 9 to be inserted between the docking groove 14 and the molding cavity 5. The nozzle 9 cooperates with the inner wall of the molding cavity 5. A telescopic drive device 10 is positioned on the injection element 71 relative to the sub-sprue sleeves 73. The telescopic end of the telescopic drive device 10 is provided with a valve needle 11 inserted into the nozzle 9.

[0038] Preferably, the top surface of the injection component 71 is provided with a first mounting groove 20 for the telescopic drive device 10 to be inserted, and the bottom inner wall of the first mounting groove 20 is provided with a guide hole 23 for the valve needle 11 to be inserted. The bottom surface of the injection component 71 is provided with a second mounting groove 24 for the top surface of the sprue sleeve 73 to be inserted. The second mounting groove 24 is connected to the flow channel groove 8, and the valve needle 11 is inserted into the second mounting groove 24.

[0039] The side core-pulling assembly 12 includes a side core-pulling member 121, a side core-pulling body 122, and a translation drive device 123. The upper module 42 has a sliding groove 25 for the side core-pulling member 121 to slide and connect. The inner sidewall of the sliding groove 25 has an inclined surface 26 that is inclined towards the molding cavity 5. The inclined surface 26 and the opposite side of the side core-pulling member 121 are in abutting fit. The inclined surface 26 has a through inclined guide hole 27 for the side core-pulling body 122 to slide and connect. The side core-pulling member 121 has an inclined guide groove 28 that extends along the inclined surface 26. The top of the side core-pulling body 122 extends out of the inclined guide hole 27 and is provided with an inclined guide block 29. The inclined guide block 29 is slidably connected in the inclined guide groove 28, so that the side core-pulling body 122 and the side core-pulling member 121 are linked and cooperated. The translation end of the translation drive device 123 is connected to the side pull member 121, so that when the side pull member 121 translates, it drives the bottom of the side pull core body 122 to extend into or be pulled out of the molding cavity 5 to form the external protrusion hole 101.

[0040] The controller 13 is located on the side wall of the upper module 42. The translation drive device 123 and each telescopic drive device 10 are electrically connected to and controlled by the controller 13.

[0041] When the molding die is in use, the upper mold assembly 4 and the lower mold assembly 2 are interlocked, so that the molding cavity 5 and the molding core 3 cooperate to form the cavity 6 for molding the automotive decorative cylinder head 1. The injection assembly 7 is designed with a main gate and multiple sub-gates. The melt from the main gate flows into the runner channel 8 in the injection component 71, and then is injected into the cavity 6 through the sub-gate sleeves 73. The telescopic drive devices 10 on the injection component 71 control the nozzles 9 to inject material in sequence, so as to achieve precise and orderly flow of the injection.

[0042] Two heating rings 18 are coaxially arranged on the injection part 71 relative to the sub-gate sleeve 73. The two heating rings 18 are respectively embedded in the top and bottom surfaces of the injection part 71. The heating rings 18 are electrically connected to and controlled by the controller 13. When the melt flows into the runner 8 at the position relative to the sub-gate sleeve 73, the controller 13 activates the corresponding two heating rings 18 to heat the melt, so as to ensure that the melt in the runner 8 maintains good fluidity.

[0043] A protective shell 16 is fitted onto the outer wall of the sprue sleeve 73. The protective shell 16 is inserted into the docking groove 14. The inner wall of the protective shell 16 is fitted with the outer wall of the sprue sleeve 73 with a clearance fit and is provided with a heating wire 17 surrounding the sprue sleeve 73. The heating wire 17 is electrically connected to and controlled by the controller 13. When the melt flows into the sprue sleeve 73, the controller 13 activates the heating wire 17 to heat the melt and ensure that the melt in the sprue sleeve 73 maintains good fluidity.

[0044] During the molding process of the automotive decorative cylinder head 1, under the drive of the translation drive device 123, the side pull member 121 moves closer to the inclined surface 26 to drive the side core pull body 122 to extend into the molding cavity 5 until the side pull member 121 and the opposite side of the inclined surface 26 abut against each other, the side core pull body 122 forms the obliquely extending external protrusion hole 101 on the automotive decorative cylinder head 1. When the automotive decorative cylinder head 1 is demolded after molding, the translation drive device 123 drives the side pull member 121 to move away from the inclined surface 26 to drive the side core pull body 122 to be pulled out of the molding cavity 5 for demolding, thus completing the oblique core pulling operation of the external protrusion hole 101.

[0045] This molding die, through optimized injection molding and the use of a side core-pulling assembly 12, effectively improves the molding process of the automotive decorative cylinder head 1, reduces the defect rate, and enhances product quality and service life.

[0046] Preferably, a top plate 31 is slidably connected between the two square iron blocks 30, and a stroke column 37 is also provided between the lower mold plate 21 and the upper mold plate 41. The top plate 31 has a stroke hole 38 through which the stroke column 37 is slidably connected to guide the movement direction of the top plate 31. The top plate 31 is provided with ejector pins 32 distributed around the forming mold core 3. The lower mold plate 22 has an ejector hole 33 through which the ejector pins 32 are inserted. The end of the ejector pin 32 cooperates with the forming mold core 3. After the upper mold assembly 4 and the lower mold assembly 2 complete the mold separation operation, the top plate 31 moves upward to drive each ejector pin 32 to push the entire automotive decorative cylinder head 1 away from the forming mold core 3, completing the entire demolding operation of the automotive decorative cylinder head 1.

[0047] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A molding die for an automotive decorative cylinder head (1), characterized in that it comprises: The lower mold assembly (2) includes a lower template (21) and a lower module (22). The lower module (22) is disposed on the top surface of the lower template (21), and a forming core (3) is disposed on the top surface of the lower module (22). The upper mold assembly (4) includes an upper template (41) and an upper module (42). The upper module (42) is disposed on the bottom surface of the upper template (41). The bottom surface of the upper module (42) is provided with a forming cavity (5). The forming cavity (5) and the forming core (3) cooperate with each other to form a cavity (6) for forming the automotive decorative cylinder head (1). The injection assembly (7) includes an injection element (71), a main sprue sleeve (72), and several sub-sprue sleeves (73) distributed around the cavity (6). The injection element (71) is located between the upper template (41) and the upper module (42). The injection element (71) has a runner groove (8) inside. The main sprue sleeve (72) and each of the sub-sprue sleeves (73) are connected to the runner groove (8). The bottom of the sub-sprue sleeve (73) is connected to a nozzle (9). The nozzle (9) cooperates with the inner wall of the molding cavity (5). The injection element (71) is positioned relative to the sub-sprue sleeve (73) with a telescopic drive device (10). The telescopic end of the telescopic drive device (10) is provided with a valve needle (11) inserted into the nozzle (9). The side core-pulling assembly (12) includes a side core-pulling component (121), a side core-pulling body (122), and a translation drive device (123). The side core-pulling component (121) is slidably connected to the interior of the upper module (42). The side core-pulling body (122) and the side core-pulling component (121) are linked and cooperated. The translation end of the translation drive device (123) is connected to the side core-pulling component (121), so that when the side core-pulling component (121) is translated, it drives the side core-pulling body (122) to extend into or withdraw from the molding cavity (5) to form an external protruding hole (101).

2. The molding die for an automotive decorative cylinder head (1) according to claim 1, characterized in that, It also includes a controller (13), which is disposed on the side wall of the upper module (42). The translation drive device (123) and each of the telescopic drive devices (10) are electrically connected to and controlled by the controller (13).

3. The molding die for an automotive decorative cylinder head (1) according to claim 2, characterized in that, The upper module (42) has a docking groove (14) for the insertion of the sprue sleeve (73). Each docking groove (14) extends through to the inner wall of the molding cavity (5). A docking hole (15) for the nozzle (9) to be inserted is provided between the docking groove (14) and the molding cavity (5).

4. The molding die for an automotive decorative cylinder head (1) according to claim 3, characterized in that, The outer wall of the sprue sleeve (73) is fitted with a protective shell (16), which is inserted into the docking groove (14). The inner wall of the protective shell (16) is fitted with the outer wall of the sprue sleeve (73) with a clearance and is provided with a heating wire (17) surrounding the sprue sleeve (73). The heating wire (17) is electrically connected to and controlled by the controller (13).

5. The molding die for an automotive decorative cylinder head (1) according to claim 2, characterized in that, The injection component (71) is coaxially provided with two heating rings (18) relative to the sub-sprue sleeve (73). The two heating rings (18) are respectively embedded in the top and bottom surfaces of the injection component (71). The heating rings (18) are electrically connected to and controlled by the controller (13).

6. The molding die for an automotive decorative cylinder head (1) according to claim 1, characterized in that, At least one alignment structure (19) is provided between the upper template (41) and the lower template (21). The alignment structure (19) includes an alignment post (191) and an alignment groove (192). The alignment post (191) is inserted into the alignment groove (192). The alignment post (191) is located on the bottom surface of the upper template (41), and the alignment groove (192) is located on the top surface of the upper module (42). Alternatively, the alignment post (191) is located on the top surface of the lower module (22), and the alignment groove (192) is located on the bottom surface of the upper template (41).

7. The molding die for an automotive decorative cylinder head (1) according to claim 1, characterized in that, The top surface of the injection part (71) is provided with a first mounting groove (20) for the telescopic drive device (10) to be inserted, and the bottom inner wall of the first mounting groove (20) is provided with a guide hole (23) for the valve needle (11) to be inserted.

8. The molding die for an automotive decorative cylinder head (1) according to claim 1, characterized in that, The bottom surface of the injection component (71) is provided with a second mounting groove (24) for the top surface of the injection port sleeve (73) to be inserted. The second mounting groove (24) is connected to the flow channel groove (8), and the valve needle (11) is inserted into the second mounting groove (24).

9. The molding die for an automotive decorative cylinder head (1) according to claim 1, characterized in that, The upper module (42) has a sliding groove (25) for the side pull member (121) to slide and connect. The inner sidewall of the sliding groove (25) has an inclined surface (26) that is inclined towards the molding cavity (5). The inclined surface (26) and the opposite side of the side pull member (121) are in abutting fit. The inclined surface (26) has a through inclined guide hole (27) for the side core pull body (122) to slide and connect. The side pull member (121) has an inclined guide groove (28) extending along the inclined surface (26). The bottom of the side core pull body (122) extends into the molding cavity (5) to form an external protrusion hole (101). The top of the side core pull body (122) extends out of the inclined guide hole (27) and is provided with an inclined guide block (29). The inclined guide block (29) is slidably connected in the inclined guide groove (28).

10. The molding die for an automotive decorative cylinder head (1) according to claim 1, characterized in that, Two square irons (30) are symmetrically arranged between the lower template (21) and the upper template (41). A top plate (31) is slidably connected between the two square irons (30). The top plate (31) is provided with top pins (32) distributed around the forming core (3). The lower template (22) has a top hole (33) through which the top pins (32) are inserted. The end of the top pin (32) is engaged with the forming core (3).

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