A rotary three-color two-station mold for automotive headlight trim parts and its process

Abstract

This invention discloses a rotary three-color two-station mold and its process for automotive lamp trim parts, comprising an upper mold assembly and a lower mold assembly that are closed to each other to form a cavity; an automotive lamp trim part, comprising a transparent part and a lamp trim part spaced apart from each other, and a frame part integrally connecting the lamp trim part and the transparent part; a connecting and mating assembly, comprising a first type of connecting part, a second type of connecting part, and a third type of connecting part, the first type of connecting part, the second type of connecting part and the third type of connecting part being arranged on the same side of the automotive lamp trim part, and all being set at different included angles with respect to the mold opening direction; wherein, the upper mold assembly includes a primary cavity and a secondary cavity, the lower mold assembly includes two oppositely arranged general cavities, and the primary cavity matches the general cavity to form the transparent part and the lamp trim part, the secondary cavity matches the general cavity to form the frame part on the transparent part and the lamp trim part, and the lower mold assembly can be rotated to selectively match the primary cavity or the secondary cavity.

Description

Technical Field

[0001] This invention relates to the field of mold equipment technology, specifically to a rotary three-color two-station mold for automotive headlight decorative parts and its process. Background Technology

[0002] Currently, automotive lighting trim pieces, especially taillights, typically feature red brake light covers, as well as surrounding frame components and light-transmitting covers. Furthermore, their shapes are often curved with a significant range of curvature.

[0003] The manufacturing process of existing automotive headlight trim parts usually involves assembling the three components mentioned above. Therefore, a matching connection structure needs to be set between the three components, or an assembly structure for the vehicle body needs to be set on the three components. Regardless of the assembly manufacturing method, there are inevitably gaps between the parts, which can lead to problems such as light leakage and water leakage, greatly increasing the manufacturing difficulty.

[0004] In the manufacturing of the above-mentioned components of the vehicle headlight trim, due to the limitation of the vehicle body installation position of the vehicle headlight trim, multiple connecting pillars or fasteners need to be set to meet the assembly requirements. However, if molds are designed separately for each component, these connecting pillars or fasteners need to be additionally set with demolding structures, which increases the manufacturing cost and the production efficiency is not high. Different components have uncontrollable deformation and shrinkage marks, which further affects the overall assembly and appearance.

[0005] In summary, there is a need for mold manufacturing equipment capable of forming the aforementioned automotive lamp trim parts to meet the requirements of product shape and aesthetics. However, based on the current assembly and connection structure requirements of automotive lamp trim parts, even if such automotive lamp trim parts can be formed in the cavity, the undercut parts in different directions make demolding of the finished product difficult, increasing the risk of damage to the finished product. It is difficult to guarantee the amount of deformation and the pass rate of the finished product during the demolding process, as well as the production efficiency of automotive lamp trim parts. Summary of the Invention

[0006] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a rotary three-color two-station mold for automotive headlight decorative parts and its process.

[0007] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a rotary three-color two-station mold for automotive lamp decorative parts, comprising an upper mold assembly and a lower mold assembly that are closed to each other to form a cavity;

[0008] The vehicle headlight trim includes a transparent part and a light fixture that are spaced apart from each other, and a frame that integrally connects the light fixture and the transparent part;

[0009] The connecting and mating components include a first type of connecting part formed on the lamp trim and the frame, a second type of connecting part formed on the lamp trim, and a third type of connecting part formed on the frame. The first type of connecting part, the second type of connecting part and the third type of connecting part are arranged on the same side of the lamp trim and are all set at different angles with respect to the mold opening direction.

[0010] The upper module includes a primary cavity and a secondary cavity, and the lower module includes two oppositely arranged general cavities. The primary cavity matches the general cavity to form a transparent part and a lighting part, and the secondary cavity matches the general cavity to form a frame part on the transparent part and the lighting part. The lower module can be rotated and selectively matched with either the primary cavity or the secondary cavity.

[0011] Also includes:

[0012] An upper demolding structure is provided on the upper module and has three types of undercuts for molding three types of connecting parts. The upper demolding structure moves away from the lighting parts in the primary cavity and the frame parts in the secondary cavity as the lower module moves.

[0013] The lower demolding structure is provided in the lower module and has two types of undercuts for forming two types of connecting parts. The two types of undercuts are configured to selectively perform demolding action in the secondary cavity.

[0014] An ejector structure is provided in the lower mold and has a type of undercut for forming a type of connection part. The type of undercut is configured to selectively perform a demolding action in the secondary cavity, and the lower demolding structure and the ejector structure are arranged to intersect, or the lower demolding structure and the ejector structure are arranged to intersect on the demolding action trajectory.

[0015] further,

[0016] A lighting component has a first light guide portion facing outward, and the lighting component has an overlapping portion supported on the lower part of a frame member. The first light guide portion is adjacent to one side boundary of the frame member and extends about the curved surface of the lighting component. The overlapping portion is connected to the first light guide portion and extends towards the other side boundary of the frame member. The overlapping portion extends at least to the side of the transparent component opposite to the first light guide portion. The first type of connecting portion is evenly distributed about the curved surface direction and the width direction of the lighting component.

[0017] Furthermore, the three types of connecting parts are formed on the top of the headlight trim and are arranged approximately vertically with respect to the mold opening direction;

[0018] The second type of connecting part is formed at the bottom of the headlight trim, the overlapping part is formed in the middle of the headlight trim, the first type of connecting part is evenly distributed in the overlapping part and the bottom of the third type of connecting part, and the second type of connecting part and the first type of connecting part are arranged approximately perpendicularly.

[0019] Furthermore, the upper demolding includes an outer slider that is slidably disposed in the cavity, an obliquely disposed guide rod, and an elastic element formed on the guide rod. Three types of undercuts are formed on the outer slider and match the upper and lower mold groups. The elastic element applies a force to the outer slider to obliquely disengage from the three types of connecting parts, and the outer slider is guided to slide on the upper and lower mold groups during the mold opening action.

[0020] Furthermore, the lower module is provided with a traction component, and the bottom of the outer slider is provided with a traction engagement component. When the mold is closed, the traction component and the traction engagement component form a transmission engagement, and the outer slider moves with the mold opening action of the lower module. A guide slope matching the three types of undercut is provided between the traction component and the traction engagement component.

[0021] Furthermore, the lower demolding structure includes a core-pulling block that forms a profile together with the lower module, and a variable track slide and a first driving element for driving the core-pulling block to move in the normal direction about the second type of connection. The second type of undercut is formed at the end of the core-pulling block, and the ejection structure passes through the core-pulling block and is set at an angle to the second type of undercut.

[0022] Furthermore, the ejection structure includes multiple obliquely arranged ejection units, the type of inverted buckle is formed on the ejection unit, and the core-pulling block is provided with a through hole for the ejection unit to pass through, the through hole allowing the ejection unit to move between any position of the core-pulling block.

[0023] Furthermore, the ejection structure includes a top plate supporting multiple ejection units and a second driving element. The ejection units are connected to the bottom of the overlapping part and the frame member corresponding to the three types of connecting parts, and at least a portion of the ejection units are provided with top blocks. The top blocks support and shape the outer contour of the vehicle lamp trim.

[0024] Furthermore, the upper module also includes:

[0025] The first casting assembly has a first casting channel arranged vertically in the cavity corresponding to the middle of the transparent part;

[0026] The second casting assembly has a second casting channel obliquely disposed in the cavity corresponding to the middle of the overlapping part and adjacent to the first light guide part. The second casting channel is disposed in the normal direction with respect to the overlapping part, and the entrance end of the second casting channel is disposed on the outside of the upper module.

[0027] The third gating assembly has a third gating channel and a fourth gating channel vertically disposed inside the cavity on the outside of the corresponding frame member. The third gating channel is adjacent to the first light guide part and has an upwardly extending first gating channel and a first gate. The fourth gating channel is located on the side of the frame member opposite to the third gating channel and has a downwardly extending second gating channel and a second gate. The first gate and the second gate have a sheet-like cross-section.

[0028] A manufacturing process for a rotary three-color two-station mold for automotive headlight trim parts includes the following steps:

[0029] A1. Analysis of the vehicle headlight trim: The vehicle headlight trim is composed of a frame, a transparent part and a lamp trim. The vehicle headlight trim is divided into a first part and a second part with different curved surfaces from the middle to both ends. The upper first surface has multiple hollow parts in the width direction. The transparent part and the lamp trim are arranged in the hollow parts. The lower second surface is divided in the wall thickness direction into the overlapping part formed on the lamp trim and the frame body, so as to control the frame, transparent part and lamp trim to have uniform wall thickness.

[0030] A1.1 Forming and positioning of the headlight trim: The tangent line connecting the first part and the second part of the headlight trim forms an angle greater than 90°. The first part, where the three types of connecting parts are located, is arranged to be approximately horizontal, and an upper demolding structure is set. The demolding action is performed by the outer slider. The second part, where the first type of connecting parts are located, is arranged obliquely downward and a lower demolding structure is set. The demolding action is performed by the core-pulling block. An ejection structure is set, and a first type of ejection unit is set for the shape of the headlight trim, a second type of ejection unit is set for the second type of connecting parts, and a third type of ejection unit is arranged at intervals corresponding to the contour of the headlight trim. The first type of ejection unit and / or the third type of ejection unit are given a stroke greater than that of the second type of ejection unit.

[0031] A1.2 Positioning of upper and lower modules: A general molding block is arranged in the lower module, and a primary molding block and a secondary molding block are arranged in the upper module. The primary molding block and the general molding block are separated to form the cavity of the transparent part and the lighting part, and the molding part of the corresponding frame part on the general molding block is closed. The secondary molding block and the general molding block are separated to form the cavity of the frame part, and the cavity of the corresponding transparent part and the lighting part on the general molding block is closed.

[0032] The upper demolding structure is arranged on the primary molding block and the secondary molding block, and above the outer end of the cavity. The lower demolding structure is embedded in the lower part of the universal molding block and forms part of the surface of the universal cavity. The ejection structure is inserted through the lower demolding structure and the universal molding block. The ejection unit is distributed in a dot matrix with respect to the outline and surface of the headlight trim. The lower demolding structure and the ejection structure move in sequence.

[0033] B. Gating design: A first gating assembly is set above the primary cavity, which is vertically facing the middle of the transparent part. A second gating assembly is set, which extends from the outer end of the upper module as an inlet to the middle of the primary and secondary cavities, and forms a gating gate at the overlapping part. A third gating assembly is set above the secondary cavity, and two gating gates are formed on both sides of the width direction of the frame part. The two gating gates are opposite to the entry direction of the secondary cavity.

[0034] C. In the first mold closing, the lower demolding structure and the ejection structure maintain the forming position. The outer slider is attached to the primary forming block and the secondary forming block under the pressure of the lower mold assembly. The traction component and the traction mating component form a transmission. The first gating component is started and controls the filling time of the transparent part to be 1.638s. The pressure is controlled at 19.61Mpa when the transparent part is filled. The second gating component is started and controls the filling time of the lighting component to be 3s. The pressure is controlled at 86Mpa when the transparent part is filled.

[0035] D. In the first mold opening, the upper demolding structure is released with the mold opening action. The outer slider performs demolding of the three types of connecting parts under the pulling action of the traction component and the ejection action of the elastic component. The lower demolding structure and the ejection structure maintain the forming position. The lower mold group carries the transparent part and the lighting part to rotate to the bottom of the secondary cavity.

[0036] E. Secondary mold closing: Step C is executed within the primary cavity. The third gating component is activated, and the filling time of the frame component is controlled at 2.56s. The pressure is controlled at 57.53Mpa when the transparent component is filled. The frame component is integrally molded on the transparent component and the lighting component. A first holding pressure time of 8s is set, and the pressure is controlled at 80Mpa. A second holding pressure time of 5s is set, and the pressure is controlled at 60Mpa.

[0037] F. Secondary mold opening: The upper demolding structure is released again, and the first driving element is activated, dragging the core-pulling block to perform the demolding action and slide relative to the ejection unit. At this time, the second part of the headlight trim is supported by the secondary molding block. The second driving element is activated, the ejection unit performs the demolding action, and the headlight trim is ejected obliquely. Step C is repeated.

[0038] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0039] 1. The components of the headlight trim are designed to be integrally molded to improve the overall integrity of the headlight trim, reduce the complexity of later assembly, and reduce the assembly gap between multiple components, thereby reducing the risk of water and light leakage. At the same time, by dividing the main body of the frame component onto the lamp trim as an overlapping part, the lamp trim and the frame component have uniform wall thickness, thus ensuring the molding quality during the molding process. In addition, the setting of the overlapping part improves the connection between the frame component and the lamp trim. The integrally molded frame component and the lamp trim support each other, improving the overall structural strength of the headlight trim.

[0040] 2. The lower mold is used as the moving mold and two general cavities are set. The upper mold has a primary cavity and a secondary cavity. The transparent parts and lighting parts that are spaced apart are formed in the primary cavity. At this time, the lower demolding component is kept in the forming position so that the lower mold can carry the transparent parts and lighting parts to rotate to the bottom of the secondary cavity. Then, the secondary mold is closed and the frame part is formed. The frame part is connected and formed between the transparent parts and the lighting parts.

[0041] 3. For the connecting parts at different locations on the headlight trim, the ejector structure and the lower demolding structure, which are set at mutual angles, can perform their actions independently to avoid possible interference during demolding. The upper demolding structure is set on the outer side of the cavity corresponding to the upper mold group. The outer slider in the upper mold group is pulled during the mold opening action and follows the action of the lower mold group until it disengages from the three types of undercuts and the three types of connecting parts. The lower demolding structure is set in the lower mold group. The core-pulling block in the lower mold group undertakes part of the overlapping part and the forming of the headlight trim. After the secondary forming is completed, the core-pulling block acts before the ejector structure, so that the lower part of the headlight trim, the headlight trim far from the ejector structure and the overlapping part have been disengaged from the forming surface, and one type of undercut disengages from one type of connecting part. Then the ejector structure controls the outline of the headlight trim, the surface relative to the upper part, and drives one type of undercut to disengage from one type of connecting part, so as to achieve smooth demolding of the headlight trim and ensure its surface quality. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the lower structure of the vehicle headlight trim of the present invention;

[0043] Figure 2 This is a schematic diagram of the side structure of the vehicle headlight trim piece of the present invention;

[0044] Figure 3 This is a structural schematic diagram of the frame component of the present invention (the dashed lines in the diagram indicate the locations of the weld lines);

[0045] Figure 4 This is a structural schematic diagram of the lighting fixture and transparent component of the present invention (the dotted lines in the diagram indicate the casting positions);

[0046] Figure 5 This is a schematic diagram of the upper module of the present invention;

[0047] Figure 6 This is a schematic diagram of the lower module of the present invention;

[0048] Figure 7 This is an exploded view of the upper module and the headlight trim of the present invention;

[0049] Figure 8 This is a cross-sectional view of the lower demolding structure of the present invention within the cavity;

[0050] Figure 9 For the present invention Figure 8Enlarged view of point A in the middle;

[0051] Figure 10 This is a schematic diagram showing the fit between the universal molding block, the lower demolding structure, and the upper demolding structure of the present invention;

[0052] Figure 11 This is a schematic diagram showing the cooperation between the upper and lower demolding structures of the present invention;

[0053] Figure 12 This is a cross-sectional schematic diagram of the upper and lower demolding structures of the present invention;

[0054] Figure 13 This is a cross-sectional view of the upper demolding structure of the present invention within the cavity;

[0055] Figure 14 For the present invention Figure 13 Enlarged view of point B in the middle;

[0056] Figure 15 This is another schematic diagram showing the fit between the upper and lower demolding structures of the present invention;

[0057] Figure 16 This is an exploded view of the secondary molding block, outer slider, and headlight trim of the present invention.

[0058] Figure 17 This is a schematic diagram showing the interaction between the outer slider and the lighting component of the present invention;

[0059] Figure 18 This is a schematic diagram of the ejector structure of the present invention within the lower module;

[0060] Figure 19 This is a schematic diagram showing the position of the auxiliary support strips on the secondary molding block of the present invention;

[0061] Figure 20 This is a schematic diagram illustrating the interaction between the ejector unit and the headlight trim piece of the present invention.

[0062] Figure 21 This is a schematic diagram of the second guiding unit of the present invention;

[0063] Figure 22 This is a schematic diagram of the first guiding unit of the present invention;

[0064] Figure 23 This is a schematic diagram showing the position of the second driving element of the present invention;

[0065] Figure 24 This is a bottom view of the headlight trim piece of the present invention; (the dotted line in the figure is the approximate boundary between the first part and the second part);

[0066] Figure 25This is a cross-sectional view of the vehicle headlight trim of the present invention (the dashed line in the figure is the line connecting the centers of the connecting parts, and the center line is the approximate boundary between the first part and the second part).

[0067] Figure 26 This is a schematic diagram showing the positions of the third and fourth casting components of the present invention;

[0068] Figure 27 This is a schematic diagram showing the positions of the first and second gates of the present invention;

[0069] Figure 28 This is a schematic diagram showing the positions of the first casting component and the second casting component of the present invention;

[0070] Figure 29 This is a schematic diagram of the slurry flow direction within the frame component of the present invention (the dotted lines in the diagram indicate the weld line locations);

[0071] In the diagram: 1. Upper module; 1.1. Primary cavity; 1.2. Secondary cavity; 1.3. Primary molding block; 1.4. Secondary molding block; 2. Lower module; 2.1. General cavity; 2.2. General molding block; 3. Headlight trim; 3.1. Transparent part; 3.2. Lighting part; 3.21. First light guide; 3.22. Overlapping part; 3.3. Frame part; 3.31. Hollowed-out part; 3.32. First frame strip; 3.33. Second frame strip; 3.34. Third frame strip; 3.35. Fourth frame strip; 3.4. First part; 3.5. Part Two; 4. Connecting and Mating Components; 4.1 Type I Connecting Part; 4.2 Type II Connecting Part; 4.3 Type III Connecting Part; 5. Upper Demolding Structure; 5.1 Type III Undercut; 5.2 Outer Slider; 5.21 Limiting and Mating Part; 5.22 Upper Forming Surface; 5.23 First Guide Surface; 5.24 Second Guide Surface; 5.3 Guide Rod; 5.31 Limiting Part; 5.4 Elastic Component; 5.5 Traction Component; 5.6 Traction Mating Component; 5.7 Guide Inclined Surface; 5.8 Guide Rail; 5.9 Locking Block; 6. Lower Demolding Structure; 6 6.1. Type II undercut; 6.2. Core-pulling block; 6.21. Through hole; 6.22. Forming surface; 6.3. Variable track slide; 6.4. First driving element; 7. Ejection structure; 7.1. Type I undercut; 7.2. Ejection unit; 7.21. Type I ejection unit; 7.22. Type II ejection unit; 7.23. Type III ejection unit; 7.3. Second driving element; 7.4. Ejector block; 7.5. Ejector plate; 7.6. First guide unit; 7.7. Second guide unit; 8. First casting assembly; 8.1. First casting channel; 9. Second casting... 9.1 Second pouring channel; 10. Third pouring assembly; 10.1 Third pouring channel; 10.11 First gating runner; 10.12 First gate; 10.2 Fourth pouring channel; 10.21 Second gating runner; 10.22 Second gate; 11. First sensor switch; 12. Second sensor switch; 13. Adjusting block; 14. Auxiliary support bar; 14.1 First support bar; 14.2 Second support bar; 15. First channel; 16. Second channel; 17. Third channel; 18. Fourth channel; 19. Fifth channel; Detailed Implementation

[0072] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0073] It should be understood that although the terms upper, middle, lower, top, one end, etc., appear in this document to describe various elements, these elements are not limited by these terms. These terms are only used to distinguish the elements from each other for ease of understanding, and are not used to define any directional or sequential restrictions.

[0074] like Figure 1-29 As shown, a rotary three-color two-station mold for automotive lamp trim 3 includes an upper mold 1 and a lower mold 2 that are closed to each other to form a cavity.

[0075] The headlight trim 3 includes a transparent part 3.1 and a lamp trim 3.2 spaced apart from each other, and a frame part 3.3 that integrally connects the lamp trim 3.2 and the transparent part 3.1;

[0076] The connecting and mating component 4 includes a first type of connecting part 4.1 evenly distributed on the lamp trim 3.2 and the frame part 3.3, a second type of connecting part 4.2 formed at the bottom of the lamp trim 3.2, and a third type of connecting part 4.3 formed on the same side of the upper end of the frame part 3.3 and the lamp trim 3.2. The first type of connecting part 4.1, the second type of connecting part 4.2 and the third type of connecting part 4.3 are arranged on the same side of the vehicle lamp trim 3, and are all set at different angles with respect to the mold opening direction.

[0077] The upper module 1 includes a primary cavity 1.1 and a secondary cavity 1.2, while the lower module 2 includes two opposing universal cavities 2.1. The primary cavity 1.1 matches the universal cavity 2.1 to form a transparent part 3.1 and a lighting part 3.2. The secondary cavity 1.2 matches the universal cavity 2.1 to form a frame part 3.3 on the transparent part 3.1 and the lighting part 3.2. The lower module 2 can be rotated and selectively matched with either the primary cavity 1.1 or the secondary cavity 1.2. That is, in the primary molding process, the transparent part 3.1 is first formed through the primary cavity 1.1. The transparent part 3.1 and the lamp part 3.2 are then molded once, and the lower mold group 2 transfers the transparent part 3.1 and the lamp part 3.2 on the general cavity 2.1 from below the primary cavity 1.1 to below the secondary cavity 1.2, and then performs secondary molding. The frame part 3.3 is formed between the transparent part 3.1 and the lamp part 3.2. Finally, the mold is opened a second time to demold the finished car lamp decoration part 3. At the same time, during the secondary molding process, the closed primary cavity 1.1 and the general cavity 2.1 continue to perform the molding work of the transparent part 3.1 and the lamp part 3.2.

[0078] Also includes:

[0079] The upper demolding structure 5 is provided on the upper mold 1 and has three types of undercuts 5.1 for molding the three types of connecting parts 4.3. The upper demolding structure 5 moves away from the lamp part 3.2 in the primary cavity 1.1 and the frame part 3.3 in the secondary cavity 1.2 as the lower mold 2 moves. Preferably, the three types of undercuts 5.1 are pushed by the elastic member 5.4 constrained on the upper mold 1, and pulled by the traction member 5.5 on the lower mold 2 during the mold opening action to ensure the reliability of the operation of the three types of undercuts 5.1.

[0080] The lower demolding structure 6 is provided in the lower mold group 2 and has a second type of undercut 6.1 for molding the second type of connection part 4.2. The second type of undercut 6.1 is configured to selectively perform demolding action in the secondary cavity 1.2. The second type of undercut 6.1 is located at the bottom of the lamp part 3.2. It does not move during the primary molding process, but moves before the ejector structure 7 after the secondary molding is completed, so as to avoid interference of the second type of connection part 4.2 in the cavity when the ejector structure 7 moves.

[0081] Ejection structure 7 is provided in the lower module 2 and has a type of undercut 7.1 for molding a type of connection part 4.1. The type of undercut 7.1 is configured to selectively perform demolding action in the secondary cavity 1.2. The type of undercut 7.1 is configured not to operate during the primary molding process, but to operate after the secondary molding is completed and after the demolding of the type of undercut 6.1. It is used to mold the type of connection part 4.1 and perform the ejection operation of the headlight trim 3.

[0082] It is worth mentioning that, since the connecting and mating components 4 are all located on the lower side of the headlight trim 3, and the connecting parts of each other also form an angle, by arranging the upper headlight trim 3, which faces the outer end of the headlight trim 3 and is not covered by the projection of the headlight trim 3 in the extending direction, as the reference part, space is given for the demolding and forming action of the first type of connecting part 4.1 and the second type of connecting part 4.2 located on the lower part of the headlight trim 3. Figure 8 As can be seen, the lower demolding structure 6 and the ejection structure 7 are intersected and arranged below the headlight trim 3, or the lower demolding structure 6 and the ejection structure 7 are intersected on the demolding action trajectory.

[0083] like Figures 1 to 4 ,as well as Figure 24 and Figure 25 As shown, as a further explanation of the transparent part 3.1, the transparent part 3.1 is made of PMMA acrylic material and is embedded with the frame part 3.3 to form a limiting position in the separation direction. An annular step for limiting is formed on the contour side of the transparent part 3.1, and a second light guide part facing inward is provided on it for illuminating the reversing light.

[0084] As a further explanation of the lamp trim 3.2, the lamp trim 3.2 is made of a red opaque material, specifically PC-2407 polycarbonate. The lamp trim 3.2 has a first light guide portion 3.21 facing outwards for use as a vehicle side marker light, and the lamp trim 3.2 has an overlapping portion 3.22 supported on the lower part of the frame member 3.3. The first light guide portion 3.21 is adjacent to one side boundary of the frame member 3.3 and extends about the curved surface of the lamp trim 3 at both ends. The frame member 3.3 is provided with a step on its outline side that limits the separation direction of the frame member 3.3; the overlapping part 3.22 is connected to the first light guide part 3.21 and extends toward the other boundary of the frame member 3.3. The overlapping part 3.22 extends at least to the side of the transparent part 3.1 away from the first light guide part 3.21. A type of connecting part 4.1 is evenly distributed in the curved surface direction and width direction of the headlight trim 3, and the overlapping part 3.22 is supported on the trim part of the frame member 3.3.

[0085] Specifically, the overlapping portion 3.22 extends upward and to the other side from the lower end of the lamp trim 3.2 corresponding to the lamp trim 3, until the transparent part 3.1 corresponds to the middle of the lamp trim 3. Thus, the overlapping portion 3.22 provides support for the main decorative surface of the frame 3.3 from below, and extends at the hollow portion 3.31 on the upper part of the frame 3.3, thereby fully supporting the frame 3.3. On the other hand, the overlapping portion 3.22 is formed on the lower part of the frame 3.3, while the first light guide portion 3.21 extends above the frame 3.3 through the hollow portion 3.31 on the frame 3.3. The inner and outer sides of the two are mutually restrained, which helps to improve the integrity of the lamp trim 3.

[0086] As a further explanation of the frame component 3.3, black opaque PC polycarbonate material is selected as the main surface of the headlight trim component 3. In the cavity, it is divided into an upper first part 3.4 and a lower second part 3.5, with the area of ​​the transparent component 3.1 near the middle of the headlight trim component 3 as the boundary. Both the first part 3.4 and the second part 3.5 are curved surfaces and are arranged as follows: the first part 3.4 is arranged horizontally with the three types of connecting parts 4.3 at the outer end as the endpoints, and the second part 3.5 extends obliquely downward about the first part 3.4. In the first part 3.4, there are multiple hollow parts 3.31, of which the hollow parts 3.31 corresponding to the first light guide part 3.21 continue to extend toward the second part 3.5, and the overlapping part 3.22 corresponds to the second part 3.5. This arrangement is beneficial to the fluidity of the casting during the injection process.

[0087] It should be noted that, thanks to the separation of the overlapping portion 3.22 on the lamp trim 3.2, the wall thickness of the lower part of the frame 3.3 is separated to the overlapping portion 3.22 on the lamp trim 3.2, so that the frame 3.3, the lamp trim 3.2 and the transparent part 3.1 can maintain a uniform wall thickness, thereby reducing the overall deformation of the lamp trim 3 during the molding and demolding process. At the same time, the overlapping portion 3.22 also plays a certain traction role for the first light guide portion 3.21 extending on the first part 3.4 and the second part 3.5. The overlapping portion 3.22, which is formed in one piece, forces the first light guide portion 3.21 to be combined with the frame 3.3, especially in the width direction. In the longitudinal direction, the frame 3.3 forms closed ends at both ends of the first light guide portion 3.21, which further constrains it.

[0088] In addition, multiple type I connecting parts 4.1 are formed on the overlapping part 3.22 and are at a certain angle with respect to the mold opening direction. This facilitates the support of the lamp trim 3.2 and the headlight trim 3 during the mold opening and transfer actions of the lower mold 2. Similarly, the type II connecting parts 4.2 formed at the bottom of the second part 3.5 are also at an angle with the mold opening direction and the type I connecting parts 4.1, which also provides a holding force for the headlight trim 3 to fit in the cavity. Through the above improvements, for example, during the assembly process, the type I connecting parts 4.1 on the overlapping part 3.22 located at the lower part of the frame part 3.3 apply a force in the assembly direction. At this time, for the headlight trim 3, the step of the first light guide part 3.21 and the hollow part 3.31 of the frame part 3.3 receive a force opposite to the assembly direction, that is, a force that drives the lamp trim 3.2 and the frame part 3.3 to hug and fit together, thereby improving the integration of the headlight trim 3.

[0089] (Connecting assembly components)

[0090] like Figures 1 to 4 ,as well as Figure 24 and Figure 25 As shown, as a further explanation of the first type of connection 4.1, there are multiple first type of connection 4.1, which are specifically connection posts with internal holes. The first type of connection 4.1 is disposed on the frame member 3.3 below the corresponding second type of connection 4.2, below the end of the first light guide 3.21 on the frame member 3.3 away from the lamp member 3.2, and is evenly spaced on the overlapping part 3.22 with respect to the width and longitudinal curved surface direction.

[0091] Furthermore, the multiple type-1 connecting parts 4.1 are arranged in the same oblique direction, and the extension line of the type-1 connecting parts 4.1 tends to be projected onto the second part 3.5 in the width direction.

[0092] As a further improvement to the headlight trim 3, the line connecting the end center of the first type of connecting part 4.1 on the projection plane in the width direction matches the curvature of the first light guide part 3.21. In other words, the end center of the first type of connecting part 4.1 coincides with the curvature trajectory of the first light guide part 3.21 in an offset manner. By controlling the first type of connecting part 4.1, it is ensured that a uniform and spaced force is applied to the curvature of the first light guide part 3.21 during the ejection action. This helps to ensure the profile of the first light guide part 3.21 and the profile of the overlapping part 3.22, and to control the amount of deformation. At the same time, since the overlapping part 3.22 is attached to and matched with the decorative surface of the frame part 3.3, the frame part 3.3 can also obtain spaced and uniform demolding force, thereby ensuring the overall molding and demolding quality. The transparent part 3.1 is planned in the cavity with a near-horizontal orientation, so that it can stably and reliably complete the demolding and molding.

[0093] As a further explanation of the second type of connection part 4.2, there is one second type of connection part 4.2, which is a connecting post with an inner hole. The second type of connection part 4.2 is provided on the lamp part 3.2, corresponding to the bottom of the first part 3.4, and the second type of connection part 4.2 forms different angles with respect to the first type of connection part 4.1 and the mold opening direction.

[0094] Preferably, the second type of connecting part 4.2 is arranged in the normal direction with respect to the first part 3.4. Furthermore, the second type of connecting part 4.2 is arranged perpendicular to the first type of connecting part 4.1. The purpose of this improvement is to provide tension force to the headlight trim 3 in the direction perpendicular to the first type of connecting part 4.1, so as to prevent the lower end of the headlight trim 3 from lifting up.

[0095] It should be noted that, due to the mutual angle between the first type of connecting part 4.1 and the second type of connecting part 4.2, the corresponding molding modules have overlapping motion trajectories at least in the demolding direction, i.e., they interfere with each other. Thanks to the lower demolding structure 6 and the ejection structure 7 that independently apply driving force, the demolding actions of the first type of connecting part 4.1 and the second type of connecting part 4.2 can be performed separately. Furthermore, after the lower demolding structure 6 has completed its action, the ejection structure 7 that matches the first type of connecting part 4.1 provides support for the molded headlight trim 3.

[0096] Through the above improvements, the ejection and molding of the first-type connecting part 4.1 are both performed by multiple ejection units 7.2. The ejection unit 7.2 is columnar and set about the normal direction of the first-type connecting part 4.1. In this way, it is not necessary to set a core-pulling structure to deal with a large number of first-type connecting parts 4.1, thus avoiding the situation where the lower module 2 loses a lot of support. The lower demolding structure 6 is embedded in the general molding block 2.2 and is part of the general molding block 2.2. It moves before the ejection structure 7 during the demolding process, thereby avoiding interference between the second-type connecting part 4.2 and the first-type connecting part 4.1 when the product is ejected.

[0097] The lower demolding structure 6 includes a core-pulling block 6.2 for performing molding and demolding actions, and a type II undercut 6.1 disposed on the core-pulling block 6.2. The type II connecting part 4.2 is formed by the type II undercut 6.1, and the core-pulling block 6.2, as the molding surface 6.22, corresponds to the lower part of the overlapping part 3.22 of the lamp trim 3, i.e., the second part 3.5 of the lamp trim 3, and is not formed by the type I connecting part 4.1. This allows the core-pulling block 6.2 corresponding to the second part 3.5 of the lamp trim 3 to detach first during the demolding process, which is beneficial for applying an ejection force to the type I connecting post on the first part 3.4 and the overlapping part 3.22. It should be noted that the extension line of the type I connecting post approaches the curved surface of the second part 3.5 and has an upward angle about the curved surface of the second part 3.5, so that the second part 3.5 of the lamp trim 3 can be smoothly ejected without forming traction on the molding surface 6.22, which could lead to product damage.

[0098] As a further explanation of the three types of connecting parts 4.3, the three types of connecting parts 4.3 are formed on the top of the headlight trim 3 and are arranged approximately vertically with respect to the mold opening direction. Specifically, the three types of connecting parts 4.3 are formed in the primary cavity 1.1 at the top end of the first light guide part 3.21, and also formed in the secondary cavity 1.2 on the lower side of the top end of the frame part 3.3, corresponding to one primary connecting part 4.1 and the frame part 3.3 body. The positions of the two three types of connecting parts 4.3 are both located on the headlight trim 3 at the ends furthest from the secondary connecting parts 4.2. This arrangement of the headlight trim 3 in the mold opening direction... The adjustment of the molding position within the cavity allows the openings and undercut surfaces of the three types of connecting parts 4.3 to face outwards, thereby enabling the upper demolding structure 5 to be set on the outer side of the corresponding cavity of the upper module 1 without occupying the molding module space on the lower side of the headlight trim 3. At the same time, the action of the upper demolding structure 5 is automatically executed with the mold opening. The ejection direction of the ejection structure 7 moves obliquely upwards about the extension direction of the second part 3.5, while the demolding direction of the upper demolding structure 5 moves obliquely downwards on the same side of the ejection direction. The end of the headlight trim 3 and its three types of connecting parts 4.3 avoid interference with the upper demolding structure 5 and its three types of undercuts 5.1 in the ejection direction.

[0099] like Figures 5 to 7 As shown, in this embodiment, two general molding blocks 2.2 are formed on the lower module 2, and a primary molding block 1.3 and a secondary molding block 1.4 are correspondingly provided on the upper module 1. The primary molding block 1.3 and the general molding block 2.2 are closed and separated to form cavities for the transparent part 3.1 and the lighting part 3.2. An auxiliary molding block for forming the first light guide part 3.21 is embedded in the primary molding block 1.3, and the cavity of the frame part 3.3 on the general molding block 2.2 is closed. An upper demolding structure 5 for the lighting part 3.2 is provided on the outside of the primary cavity 1.1.

[0100] The secondary molding block 1.4 and the general molding block 2.2 close and separate the cavity of the frame part 3.3, while the cavity of the general molding block 2.2 corresponding to the lamp part 3.2 and the transparent part 3.1 is closed, and an upper demolding structure 5 for the frame part 3.3 is provided on the outside of the secondary cavity 1.2.

[0101] (Upper demolding structure 5)

[0102] The upper demolding assembly is mainly used for molding and demolding the undercut parts on the headlight trim 3. The upper demolding assembly is set on the upper mold 1, and the lower mold 2 performs the mold opening action. It is located away from the upper mold 1, so there is no need to modify the general molding block 2.2 on the lower mold 2. The product features that distinguish between primary molding and secondary molding are modified by primary molding block 1.3 and secondary molding block 1.4. Depending on the different undercut parts of the contour ends of different parts of the headlight trim 3, the upper demolding assembly is set at the corresponding primary cavity 1.1 and secondary cavity 1.2.

[0103] like Figures 13 to 17 As shown, in one embodiment of the upper demolding structure 5, the upper demolding structure 5 includes:

[0104] The outer slider 5.2 is slidably disposed relative to the cavity and arranged on the outside of the cavity. The outer slider 5.2 has three types of undercuts 5.1 for forming the three types of connecting parts 4.3, and the three types of undercuts 5.1 are fitted to the primary cavity 1.1 or the secondary cavity 1.2. The three types of connecting parts 4.3 are obliquely disposed about the mold opening direction, and during the mold opening action, the outer slider 5.2 and the three types of undercuts 5.1 on it move away from the undercut part synchronously under the guidance of the guide rod 5.3 and the action of the elastic element 5.4.

[0105] The guide rod 5.3 is obliquely fixed to the upper module 1 and set at an angle with respect to the undercut part. The outer slider 5.2 is constrained to slide on the guide rod 5.3. The guide rod 5.3 passes through the outer slider 5.2 so that the extension direction of the guide rod 5.3 constitutes the sliding trajectory of the outer slider 5.2. Specifically, it is arranged obliquely downward relative to the outside of the cavity, so as to be away from the ejection direction of the headlight trim 3.

[0106] The elastic element 5.4 is disposed on the guide rod 5.3 and abuts against the upper module 1 and the outer slider 5.2. During the mold opening operation, the elastic element 5.4 applies a downward force to the outer slider 5.2 about the extension direction of the guide rod 5.3. In the mold opening state, the elastic element 5.4 applies a force to the outer slider 5.2 to disengage obliquely from the three-type connecting part 4.3, and the outer slider 5.2 is guided to slide on the upper module 1 and the lower module 2 during the mold opening operation. During the mold closing operation, the outer slider 5.2 is adhered to the upper module 1 under the mold closing force of the lower module 2.

[0107] As a further explanation of the three types of deductions in 5.1, such as Figure 14 As shown, the upper part of the outer slider 5.2 corresponding to the three types of undercut 5.1 forms the upper molding surface 5.22 of the upper module matching the upper module 1, and together they form the primary cavity 1.1 and the secondary cavity 1.2. The lower part of the outer slider 5.2 corresponding to the three types of undercut 5.1 forms the lower molding surface 6.22 of the lower molding block matching the lower module 2, and together they form the general cavity 2.1.

[0108] like Figure 16 and Figure 17 As shown, for the headlight trim 3, in the one-time molding process, the trim 3.2 has a first and third type undercut 5.1 in the primary cavity 1.1, and the outer slider 5.2 in the primary cavity 1.1 forms a first upper molding surface 5.22 that matches the first and third type undercut 5.1. The frame 3.3 has a second and third type undercut 5.1 in the secondary cavity 1.2, and the outer slider 5.2 in the secondary cavity 1.2 forms a second upper molding surface 5.22 that matches the second and third type undercut 5.1. Type 1 undercut 5.1 and Type 2 and Type 3 undercut 5.1 have undercut amounts H1 and H2 in the horizontal direction. The outer slider 5.2 has a horizontal stroke H0 under the constraint of the guide rod 5.3. H0 is set to be greater than H1 and H2. Furthermore, the outer slider 5.2 also has a downward stroke H01 under the constraint of the guide rod 5.3. This downward stroke H01 is adapted to match the downward angle of Type 1 and Type 3 undercut 5.1 and Type 2 and Type 3 undercut 5.1 to adapt to the oblique angle of the undercut part for demolding.

[0109] from Figure 14 As can be seen, specifically, the upper module 1 is provided with a first guide surface 5.23 that slides with the back of the outer slider 5.2, and the lower module 2 is provided with a second guide surface 5.24 that mates with the bottom of the outer slider 5.2. The slope of the first guide surface 5.23 matches the slope angle of the guide rod 5.3, and the slope of the second guide surface 5.24 matches the slope angle of the three types of undercuts 5.1. Thus, during the mold opening and closing process, the outer slider 5.2 slides along the first guide surface 5.23 and the second guide surface 5.24 under the action of the elastic element 5.4, so that the outer slider 5.2 is reliably constrained and guided during the operation, ensuring the reliability of the mold opening and closing operation, as well as the reliability of the undercut part forming.

[0110] As a further improvement to the upper demolding assembly, the lower mold 2 is provided with a traction component 5.5. The traction component 5.5 is fixed on the outside of the general molding block 2.2 and corresponds to the mold closing position of the outer slider 5.2. The bottom of the outer slider 5.2 is provided with a traction engagement part. The traction component 5.5 and the traction engagement part form an L-shaped hook. The traction component 5.5 and the traction engagement part form a transmission engagement with each other in the mold opening direction.

[0111] Preferably, the mating surfaces between the traction member 5.5 and the traction mating part have an inclined surface that matches the second guide surface 5.24, thereby ensuring that the transmission traction member 5.5 and the traction mating part can smoothly disengage during the mold opening process and avoid jamming.

[0112] It should be noted that, preferably, the outer slider 5.2 remains in contact with the first guide surface 5.23 or the second guide surface 5.24 when the mold is fully open, so as to provide guidance and constraint for the closing action of the outer slider 5.2 when the mold is closed again.

[0113] As a technical purpose of the traction component 5.5, it is used to drag the outer slider 5.2 downward during the mold opening process, to ensure the reliability of the action of the outer slider 5.2 during the mold opening process, and to prevent the outer slider 5.2 from being demolded when the force of the elastic component 5.4 is insufficient to drive the outer slider 5.2 to perform the demolding action. In this case, the traction component 5.5 assists in performing the demolding action of the outer slider 5.2.

[0114] Based on the above, while the traction component 5.5 pulls the outer slider 5.2 downward, the outer slider 5.2, under the action of the guide rod 5.3, moves diagonally downward away from the inverted part until the traction component 5.5 disengages from the traction engagement part.

[0115] In other embodiments, to ensure that the outer slider 5.2 completes the mold opening action and completely disengages from the undercut portion, the engagement stroke of the traction member 5.5 and the traction engagement portion can be controlled so that when the traction member 5.5 is completely disengaged from the traction engagement portion, the three types of undercuts 5.1 leave the undercut portion. Thus, even if the elastic member 5.4 loses its driving effect, it can still complete the mold opening action under the action of the traction member 5.5. For the elastic member 5.4, which has both mold opening execution force and incomplete mold opening execution force, it can still apply a certain force to the outer slider 5.2 during the mold opening action to reduce the movement gap of the outer slider 5.2 in the mold opening direction and ensure the stability and reliability of the action of the outer slider 5.2.

[0116] Optionally, a locking block 5.9 is provided on the back of the upper molding block corresponding to the upper module 1. The locking block 5.9 abuts against the rear of the upper molding block in the mold-closed state to ensure the stability of the mold-closed state. In the mold-open state, the locking block 5.9 is limited to the extreme release position of the outer slider 5.2.

[0117] In one embodiment where the outer slider 5.2 is constrained on the upper module 1, the end of the guide rod 5.3 is fixed inside the upper module 1 by a threaded connection. The end of the guide rod 5.3 away from the outer slider 5.2 and the elastic member 5.4 forms a limiting part 5.31. The outer slider 5.2 is provided with a limiting fitting part 5.21, and the guide rod 5.3 passes through the limiting fitting part 5.21. The limiting fitting part 5.21 is a stepped hole through which the guide rod 5.3 passes. The elastic member 5.4 abuts against one side of the limiting fitting part 5.21, and the limiting part 5.31 is provided facing the other side of the limiting fitting part 5.21. Thus, the limiting fitting part 5.21 provides an abutment position for the elastic member 5.4, provides a limit opening position for the outer slider 5.2, and provides the stroke for the mold opening action.

[0118] Preferably, regarding the mold opening direction, the outer slider 5.2 has a through hole provided along the extension direction of the guide rod 5.3. This through hole is used for the limiting part 5.31 on the guide rod 5.3 to pass through. That is, during the mold opening process, the outer slider 5.2 moves obliquely downward along the direction of the guide rod 5.3 under the action of the elastic element 5.4, and at the same time, the limiting part 5.31 on the guide rod 5.3 enters the through hole, further reducing the movement of the outer slider 5.2.

[0119] Specifically, guide rails 5.8 are fixedly installed on both sides of the outer slider 5.2. The extension direction of the guide rails 5.8 matches that of the guide rod 5.3. The upper module 1 has a concave guide block on one side corresponding to the guide rail 5.8. The outer slider 5.2 has a concave guide groove for the guide rail 5.8 to be inserted. The concave guide block and the concave guide groove hug each other and constrain the guide rail 5.8, thereby further optimizing the guidance of the movement of the outer slider 5.2.

[0120] (Lower demolding structure 6)

[0121] like Figures 8 to 12 As shown, in one embodiment of the lower demolding structure 6, the lower demolding assembly includes:

[0122] The core-pulling block 6.2 is obliquely arranged and embedded in the general molding block 2.2, forming a molding surface 6.22 that matches the lower surface of the headlight trim 3. The molding surface 6.22 is provided with a type II buckle 6.1 that is obliquely arranged upward. The type II buckle 6.1 is used to form the type II connecting part 4.2. Furthermore, the arrangement direction of the core-pulling block 6.2 corresponds to the normal direction of the type II connecting part 4.2. The ejector structure 7 passes through the core-pulling block 6.2 and is set at an angle to the type II buckle 6.1.

[0123] The guide rail 6.3 is provided with a drag engagement part that connects to the core pull block 6.2. The drag engagement part guides the core pull block 6.2 to move normally about the undercut part.

[0124] The first drive element 6.4 applies a dragging force in the sliding direction of the variable track slide 6.3, and the first drive element 6.4 can be selectively activated to cause the core-pulling block 6.2 to move in the normal direction of the second type of connection part 4.2 and detach from the headlight trim 3, or extend into the molding position within the universal molding block 2.2, or remain in the molding position to keep the headlight trim 3 within the lower module 2 and move synchronously with the lower module 2.

[0125] Specifically, the molding surface 6.22 of the core-pulling block 6.2 is mainly used to form the lower part of the overlapping part 3.22 on the first light guide part 3.21, as well as part of the overlapping part 3.22. Through the above improvements, the lower part of the second part 3.5 of the headlight trim 3 is demolded before the rest of the parts, which is conducive to the separation of the rest of the headlight trim 3 from the cavity, so as to avoid the finished product sticking to the cavity surface.

[0126] After the core-pulling block 6.2 completes the demolding action, thanks to the above-mentioned molding arrangement of the headlight trim 3, the universal molding block 2.2 can still provide effective support for the headlight trim 3.

[0127] The lower module 2 is connected to a rotating disk to achieve rotation relative to the upper module 1. The purpose is to transfer the headlight trim 3 between the primary cavity 1.1 and the left general cavity 2.1 to the secondary cavity 1.2 by rotation. The first driving element 6.4 is set to operate at the secondary cavity 1.2. During the transfer process, the headlight trim 3 can be held on the general cavity 2.1 and transferred with the rotation of the lower module 2. The independent first driving element 6.4 ensures that the one-time molded headlight trim 3 will not detach when the mold is opened.

[0128] As an example, the black frame 3.3 serves as the outer fixing element for the light-transmitting element and the lamp element 3.2. In the one-time molding process, the light-transmitting element and the lamp element 3.2, which are spaced apart, are molded first. Then the mold is opened, and the lower demolding assembly remains in the molding position without moving. The light-transmitting element and the lamp element 3.2 move to the bottom of the secondary cavity 1.2 as the lower mold 2 rotates. Then the mold is closed, and the frame 3.3 is injection molded. The frame 3.3 fills and connects the space between the lamp element 3.2 and the light-transmitting element, so that the frame 3.3, the light-transmitting element, and the lamp element 3.2 constitute an integral vehicle lamp decoration 3. The lamp element 3.2 is formed on the upper and lower surfaces of the frame 3.3. Then the mold is opened, and the lower demolding assembly moves, allowing the three types of connecting parts 4.3 on the lamp element 3.2 to be released.

[0129] After the secondary molding is completed, as an implementation method for demolding the three types of connecting parts 4.3 by the lower demolding assembly, the core-pulling block 6.2 is arranged in a downwardly angled position to match the normal direction of the three types of connecting parts 4.3. The guide slide 6.3 provides downward movement guidance for the core-pulling block 6.2, which is specifically achieved through the oblique dragging engagement part between the two. During the operation, the first driving element 6.4 drives the guide slide 6.3 to move horizontally. Under the guidance of the dragging engagement part, the core-pulling block 6.2 disengages from the normal direction of the undercut part.

[0130] In this embodiment, the lower part of the core-pulling block 6.2 is supported on the lower template of the lower module 2, and the upper part and the periphery of the core-pulling block 6.2 are supported by the universal molding block 2.2. The universal molding block 2.2 is disposed in the lower module 2 and together with the core-pulling block 6.2 forms the molding surface 6.22 of the lamp part 3.2. The universal molding block 2.2 and the lower template form an oblique guide channel that constrains the demolding direction of the core-pulling block 6.2. The guide channel is set to match the normal of the three-type connecting part 4.3, thereby ensuring the directional reliability of the core-pulling block 6.2 during the demolding process.

[0131] Furthermore, the track-changing slide 6.3 is configured to be arranged in the same direction as the output end of the first driving element 6.4. In this embodiment, the track-changing slide 6.3 and the first driving element 6.4 are preferably arranged horizontally. The lower part of the general forming block 2.2 and the lower template also have a horizontal guide surface that matches the track-changing slide 6.3. The horizontal guide surface constitutes a horizontal guide channel that constrains the track-changing slide 6.3.

[0132] like Figure 11 As shown, specifically, the dragging mating part includes a guide groove formed on the end face of the variable track slide 6.3, and a guide bar formed on the end of the core-pulling block 6.2 away from the forming surface 6.22. The guide bar is T-shaped and slides within the guide groove, guiding the core-pulling block 6.2 to slide.

[0133] Through the above improvements, the core-pulling block 6.2 and the lower template guide the core-pulling block 6.2 and the guide rail slide 6.3, ensuring the stability and reliability of the movement of the core-pulling block 6.2 and the guide rail slide 6.3. Furthermore, the core-pulling block 6.2 and the guide rail slide 6.3 are guided by the dragging and mating parts of the T-shaped section, thereby improving the reliability of the demolding of the undercut parts and improving the molding quality of the lamp part 3.2.

[0134] In other embodiments, the first driving element 6.4 is selected as a hydraulic cylinder to ensure the stability of the guide slide 6.3 during mold closing and the power supply during demolding. Furthermore, a locking block 5.9 is also provided on the upper module 1. The purpose of the locking block 5.9 is to lock on the back of the guide slide 6.3 as the upper module 1 and the lower module 2 approach each other in the mold closing state, so as to keep the molding surface 6.22 in the mold closing position, and the locking block 5.9 disengages from the guide slide 6.3 in the mold opening state.

[0135] As a further embodiment of the guide rail slide 6.3 and locking block 5.9, the mating surface between the guide rail slide 6.3 and locking block 5.9 is set as an inclined surface, thereby ensuring the tight fit between locking block 5.9 and guide rail slide 6.3. Furthermore, the end face of locking block 5.9 facing away from guide rail slide 6.3 is also set as an inclined surface, and this inclined surface abuts against the lower template of lower module 2, so that when upper module 1 and lower module 2 are closed, locking block 5.9 reliably maintains the closed position of guide rail slide 6.3 under the tight fit of the inclined surfaces on both sides.

[0136] like Figure 12 As shown, the dragging mating part has an angle A about the horizontal direction, and the normal of the three-type connecting part 4.3 has an angle B about the horizontal direction. A is set to be greater than B. For example, the angle A is 50°, and the angle B of the normal of the three-type connecting part 4.3 and the core-pulling block 6.2 about the horizontal direction is 30°. This angle setting of the dragging mating part actually controls and reduces the sliding stroke of the core-pulling block 6.2 on the normal of the three-type connecting part 4.3. Moreover, this angle setting allows the core-pulling block 6.2 to quickly detach even when the first driving element 6.4 and the lower mold group 2 simultaneously enter the mold opening and demolding action, without affecting the interference of the undercut part on the ejection of the headlight trim 3.

[0137] The ejector unit 7.2 of the ejector pin structure passes through the core-pulling block 6.2. The core-pulling block 6.2 has a through hole 6.21 for the ejector pin assembly to pass through. During the ejection process, the ejector pin unit passes through the core-pulling block 6.2 and the general molding block 2.2 and abuts against the curved surface of the headlight trim 3. Thanks to the control of the sliding stroke of the core-pulling block 6.2, the length of the through hole 6.21 is reduced to a certain extent, so that the headlight trim 3.2 can be ejected within the limited space of the core-pulling block 6.2 and the lower module 2.

[0138] It should be noted that the presence of the through hole 6.21 allows the core-pulling block 6.2 to avoid the ejector unit 7.2 which is held in the molding position. The upper curved surface of the headlight trim 3 is set in a nearly horizontal position and supported on the top surface of the molding block. The ejector pin assembly ejects towards the curved surface in an oblique upward direction, so that the through hole 6.21 is set nearly vertically relative to the length direction of the core-pulling block 6.2. This method also facilitates the processing and manufacturing of the core-pulling block 6.2.

[0139] (Top Structure 7)

[0140] like Figures 18 to 12 As shown, as a further embodiment of the ejector structure 7,

[0141] like Figure 20 As shown, the lower module 2 is provided with an ejection structure 7, which includes a top plate 7.5, a second driving element 7.3 for driving the top plate 7.5, and a plurality of ejector pin units formed on the top plate 7.5. The ejector pin units are obliquely arranged and pass through the core-pulling block 6.2 and the general molding block 2.2 from bottom to top. The ejection structure 7 provides demolding force to eject the headlight trim 3 from the molding module. The ejection structure 7 also forms at least a type of undercut 7.1 for molding a type of connecting part 4.1. The second driving element 7.3 is fixed on the lower module 2. The ejection structure 7 simultaneously performs the molding of the type of connecting part 4.1 and the ejection of the headlight trim 3.

[0142] The core-pulling block 6.2 has a through hole 6.21 for the ejector unit 7.2 to pass through. The through hole 6.21 allows the ejector unit 7.2 to move between any position of the core-pulling block 6.2. Thus, the core-pulling block 6.2 can move before the ejector unit, and then the ejector unit moves. The molding module on the lower surface of the headlight trim 3 can maintain the molding surface without modifying the surface of the universal molding block 2.2 to design the core-pulling module.

[0143] Specifically, the ejector unit 7.2 is connected to the bottom of the overlapping part 3.22 and the frame part 3.3 corresponding to the three types of connecting parts 4.3, and at least part of the ejector unit 7.2 is provided with a top block 7.4. The top block 7.4 supports and shapes the outer contour of the headlight trim 3, thereby applying a uniform ejection force to the headlight trim 3 during the ejection action. The arrangement between the ejector structure 7, the upper demolding structure 5, the lower demolding structure 6 and the general molding block 2.2 provides guidance for the ejector unit 7.2. The ejector unit 7.2 passing through the above-mentioned does not occupy the space of the molding module of the lower module 2, and provides a movable ejection force and the molding of the first type of connecting part 4.1 within a limited space.

[0144] Specifically, the ejector pin assembly and the core-pulling block 6.2 are set at a certain angle, and the core-pulling block 6.2 is provided with a through hole 6.21 for extending about its direction of movement. As an example, the ejector pin assembly and the core-pulling block 6.2 are set perpendicularly, and the ejector pin assembly passes through the core-pulling block 6.2. Thus, within a limited space, the ejector pin assembly enables the demolding of multiple first-class connecting parts 4.1. Furthermore, the core-pulling block 6.2 leaves the surface of the headlight trim 3 during demolding, while the general molding block 2.2, as a molding component occupying a large area of ​​the molding surface 6.22, remains in its current position to provide support for the headlight trim 3.

[0145] Through the above improvements, demolding of undercut parts in different directions is achieved, while ensuring the molding quality of each undercut part. Furthermore, thanks to the independent second driving element 7.3 of the ejection structure 7, demolding of the first type of connecting part 4.1 can be performed after the core-pulling block 6.2 completes the demolding of the second type of connecting part 4.2, so as to avoid interference caused by the different directions of the undercut parts.

[0146] In this embodiment, to further increase the production efficiency of the headlight trim 3, each general cavity 2.1, primary cavity 1.1 and secondary cavity 1.2 is provided with two forming positions, the top plate 7.5 extends to the two forming positions, and the second driving element 7.3 and the guide post are arranged on both sides of the top plate 7.5.

[0147] As can be seen from the above, the ejector unit is set at an angle to the core-pulling block 6.2. Furthermore, before the final product is ejected during the one-time molding process, the ejector unit also serves as the connecting part of the headlight trim 3 and the molding surface 6.22 on the contour side, so as to always support the headlight trim 3 during the demolding process and avoid demolding damage.

[0148] like Figure 21 and Figure 22 As shown, specifically, it also includes a guide unit, specifically a first guide unit 7.6 and a second guide unit 7.7. The first guide unit 7.6 passes through the top plate 7.5 and abuts against the lower module 2. The second guide unit 7.7 is connected to the top plate 7.5 and passes through the lower module 2, and supports the upper module 1 in the mold-closed state. The first guide unit 7.6 serves as a guide between the top plate 7.5 and the lower module 2, and the second guide unit 7.7 serves as a guide between the top plate 7.5 and the second driving element 7.3, further optimizing the accuracy and reliability of the top plate 7.5's movement. In addition, the second guide unit 7.7 extends out of the upper module 1 to abut against the upper module 1 in the mold-closed state, optimizing the positioning effect in the mold-closed state.

[0149] In other embodiments, the pin unit is also supported on the surface of the headlight trim 3, preferably on the periphery of the frame 33 corresponding to the transparent part 3.1, and on the periphery of the hollow part 3.31 on the first part 3.4;

[0150] In other embodiments, the ejector pin unit is also attached to the contour side of the headlight trim 3.

[0151] like Figure 18 and Figure 20 As shown, as a further embodiment of the ejector unit, the ejector unit is divided into a first type of ejector unit 7.21 supported on the bottom of the profile of the headlight trim surface, a second type of ejector unit 7.22 supported on a first type of inverted 7.1, and a third type of ejector unit 7.23 corresponding to the contour side of the headlight trim surface.

[0152] As a further explanation of the headlight trim 3, the headlight trim 3.2 and the frame 3.3 together form a second part 3.5 and a first part 3.4 connected in an arc shape. The second type of connecting part 4.2 corresponding to the core-pulling block 6.2 is formed on the second part 3.5. The first type of connecting part 4.1 corresponding to the second type of ejection unit 7.22 acts on the second part 3.5 and the end of the first part 3.4. The first type of ejection unit 7.21, which provides the forming surface 6.22 and the supporting function, acts on the first part 3.4, specifically located between the multiple hollow parts 3.31 on the first part 3.4. Preferably, it is arranged in a way that surrounds the contour interval of the transparent part 3.1 and the overlapping part 3.22 to ensure the stress stability of the headlight trim 3 during demolding.

[0153] The three types of ejection units 7.23 are specifically disposed on the periphery of the first part 3.4. The top block 7.4 is formed on the three types of ejection units 7.23. The top block 7.4 forms the contour side molding surface 6.22 of the headlight trim 3 and supports the contour side of the headlight trim 3. Preferably, it is disposed with respect to the periphery of the contour of the frame member 3.3, and is at least disposed on both sides of the first part 3.4 corresponding to the hollow part 3.31, and on both sides of the end of the first part 3.4 corresponding to the three types of connecting parts 4.3, and the lower end of the second part 3.5 corresponding to the bottom of the two types of connecting parts 4.2.

[0154] Thus, even after the core-pulling block 6.2 is detached, the aforementioned ejector pin unit and lower module 2 can still provide effective support for the headlight trim 3.

[0155] Specifically, the ejection stroke of the first type ejection unit 7.21 and the third type ejection unit 7.23 is greater than that of the second type ejection unit 7.22, so that after the ejection action is performed, the first type undercut 7.1 can complete the demolding of the first type connecting part 4.1, while the first type ejection unit 7.21 and the third type ejection unit 7.23 still maintain support for the headlight trim 3.

[0156] In the above embodiments, it is desirable to increase the smoothness of the movement and the reliability of the movement trajectory of each sliding component that performs demolding. A gap control structure is also provided. The gap control structure includes an adjustment groove provided on the sliding component and an adjustment block 13 that is adjustable in the vertical direction of the sliding surface. By adjusting the adjustment block 13, the gap between the sliding component and its contact surface can be controlled. The adjustment block 13 can be fastened by countersunk screws. By adjusting the tightness of the countersunk screws, the movement gap can be adjusted to reduce the movement jamming of the sliding component.

[0157] like Figure 12 As shown, adjustment grooves are provided on the moving surfaces of the core-pulling block 6.2 and the guide slide 6.3. These adjustment grooves are specifically located on the upper and lower sliding surfaces of the guide slide 6.3 and the core-pulling block 6.2. Adjustment blocks 13 are provided on the adjustment grooves to control the movement clearance. The adjustment blocks 13 control the movement clearance between the moving surfaces of the core-pulling block 6.2 and the guide slide 6.3 and their corresponding guide channels.

[0158] As a further optimization of the movement of the outer slider 5.2, an adjustment block 13 is provided on the outer slider 5.2. The adjustment block 13 forms a sliding surface that contacts the upper module 1, that is, the adjustment block 13 contacts the first guide surface 5.23. The outer slider 5.2 is provided with an adjustment groove, and the adjustment block 13 is placed in the adjustment groove and is adjustable in terms of the normal direction of the sliding direction.

[0159] Optionally, the adjusting block 13 is fixed in the adjusting groove by at least two bolts, and the movement gap between the outer slider 5.2 and the first guide surface 5.23 is controlled by adjusting the tightness between the bolts.

[0160] Optionally, an adjustment block 13 and an adjustment groove are provided on the lower module 2 at a position corresponding to the second guide surface 5.24 to adjust the gap at the bottom of the outer slider 5.2.

[0161] Through the above improvements, the sliding clearance of each sliding component is controlled by using the adjusting block 13 and the adjusting groove, thereby ensuring the sliding stability and reliability of each component during the mold opening and closing process.

[0162] It is worth mentioning that the inclined surfaces on both sides of the locking block 5.9 are also provided with adjustment grooves and adjustment blocks 13, so as to control the tightness of the locking block 5.9 between the changing slide plate 6.3 and the lower template.

[0163] like Figure 5 , Figure 7 , Figure 16 and Figure 19As shown, in some other embodiments, as a further improvement to the molding of the headlight trim 3, a molding channel is provided on the periphery of the cavity. The molding channel connects to the cavity and is used to allow overflowing casting material to enter the molding channel and form an auxiliary support 14 in the molding channel. This helps to reduce and release the molding internal stress of the headlight trim 3. The auxiliary support 14 not only shares the ejection force of the ejection unit 7.2 on the headlight trim 3, but also matches on the top block 7.4 to increase the support area of ​​the ejection unit 7.2 on the auxiliary support 14.

[0164] Preferably, the auxiliary support bars 14 are arranged sequentially at intervals about the longitudinal curved surface of the headlight trim 3, and extend outward to form the first support bar 14.1. Adjacent first support bars 14.1 are connected to each other at their ends to form the second support bar 14.2. The second support bar 14.2 matches the curved surface of the headlight trim 3. This arrangement helps to increase the integrity of the auxiliary support bars 14, thereby improving the reliability of ejecting the headlight trim 3 and the fluidity of the casting in the cavity, ensuring the molding quality.

[0165] Specifically, since the two general molding blocks 2.2 of the lower module 2 have the same structure, molding channels are provided on the primary molding block 1.3 and secondary molding block 1.4 of the upper module 1, and the molding channels are preferably provided on the contour side of the headlight trim 3, which are specifically divided into the first channel 15, the second channel 16, the third channel 17, the fourth channel 18 and the fifth channel 19.

[0166] The first channel 15 and the second channel 16 are arranged on both sides of the first part 3.4 on the headlight trim 3. Specifically, on the side of the frame 3.3 corresponding to the first light guide 3.21, and on the side of the frame 3.3 away from the first light guide 3.21. The side away from the first light guide 3.21 is adjacent to a hollow part 3.31. This method helps to improve the structural reliability of the first part 3.4 of the headlight trim 3 and reduce the deformation of the boundary of the hollow part 3.31 when it is ejected.

[0167] The third channel 17 and the fourth channel 18 are arranged on the headlight trim 3 on both sides of the second part 3.5, specifically on both sides of the lower end of the frame 3.3. The third channel 17 and the fourth channel 18 are close to each other because the lower end of the frame 3.3 tends to converge. It is worth mentioning that the gate of the frame 3.3 is located on the outside of its two side boundaries, that is, the pouring channel is separated between the first channel 15 and the second channel 16, the third channel 17 and the fourth channel 18 divided by the first part 3.4 and the second part 3.5.

[0168] The fifth channel 19 is arranged at the end of the headlight trim 3 corresponding to the first part 3.4, specifically on the surface of the third type of connecting part 4.3.

[0169] In the above embodiment, top blocks 7.4 are received on both the first channel 15 and the second channel 16, and the top blocks 7.4 are preferably disposed on the arc-shaped outward protrusion of the hollow portion 3.31. The top blocks 7.4 are used to maintain the boundary quality of the hollow portion 3.31 of the frame member 3.3. In addition, top blocks 7.4 are also received at the ends of the third channel 17 and the fourth channel 18, that is, at the lower end of the second part 3.5 of the headlight trim 3. The top blocks 7.4 are used to hold the lower part of the frame member 3.3. The end features provide an auxiliary force for ejection, preventing the lower end of the headlight trim 3 from warping during ejection. Furthermore, two top blocks 7.4 are provided on both sides of the fifth channel 19. These two top blocks 7.4 are arranged on both sides of the third type of connecting part 4.3, that is, on both sides of the forming surface 6.22 of the outer slider 5.2. One of them is directly opposite the lower part of the headlight trim 3 corresponding to the first light guide part 3.21, and the other is directly opposite the lower part of the hollow part 3.31 on the other side of the headlight trim 3.

[0170] Through the above improvements, the area of ​​action of the ejection structure 7 on the headlight trim 3 is further increased by the auxiliary support 14 and the top block 7.4, ensuring the ejection stability of the headlight trim 3 and reducing the deformation and warping of the headlight trim 3.

[0171] In particular, the outer slider 5.2 has a trapezoidal molding part that extends into the cavity. The auxiliary support bar 14 in the fifth channel 19 is sequentially formed on the inclined side and top side of the molding part along the width direction of the end of the headlight trim 3, so as to support the auxiliary support bar 14 in the fifth channel 19 by the outer slider 5.2.

[0172] like Figure 11 As shown, a first inductive switch 11 and a second inductive switch 12 are arranged at the output end of the first driving element 6.4 to detect the movement and return position of the actuating end of the first driving element 6.4. The first inductive switch 11 and the second inductive switch 12 form a signal connection with the control system of the mold injection machine and send the position signal of the actuating end of the driving unit to indicate that the three types of connecting parts 4.3 and the three types of undercuts 5.1 on the core-pulling block 6.2 have completed demolding, or that the core-pulling block 6.2 is in the mold closing position. After receiving the correct signal, the control system issues an instruction to perform the next action to ensure that the mold does not cause collisions or other phenomena due to accidental failure of the action.

[0173] like Figure 23As shown, specifically, the actuating end of the second driving element 7.3 is connected to a first inductive switch 11 and a second inductive switch 12 to detect whether the actuating end of the second driving element 7.3 extends or retracts into place. The second driving element 7.3 is preferably a hydraulic cylinder. The two inductive switches at the stroke position prevent accidental hydraulic cylinder movement. The inductive switches transmit signals to the injection molding machine system. After receiving the positive confirmation signal, the system issues an instruction to perform the next action, which can avoid mold collision caused by action failure.

[0174] like Figures 26 to 28 As shown, specifically, the upper module 1 also includes:

[0175] The first casting assembly 8 has a first casting channel 8.1 vertically arranged in the cavity corresponding to the middle of the transparent part 3.1;

[0176] The second casting assembly 9 has a second casting channel 9.1 obliquely disposed in the cavity corresponding to the middle of the overlapping part 3.22 and adjacent to the first light guide part 3.21. The second casting channel 9.1 is disposed in the normal direction with respect to the overlapping part 3.22. The entrance end of the second casting channel 9.1 is disposed on the outside of the upper module 1. Through the above improvements, the second casting channel 9.1 casts on the upper surface of the overlapping part 3.22 and the frame member 3.3 integrally formed, so that after the secondary molding, the frame member 3.3 can cover the mold edge around the casting position.

[0177] The third gating assembly 10 has a third gating channel 10.1 and a fourth gating channel 10.2 vertically arranged inside the cavity on the outside of the corresponding frame member 3.3. The third gating channel 10.1 is adjacent to the side of the first light guide 3.21 and has an upwardly extending first gating runner 10.11 and a first gate 10.12. The fourth gating channel 10.2 is located on the side of the frame member 3.3 away from the third gating channel 10.1 and has a downwardly extending second gating runner 10.21 and a second gate 10.22. The cross-section of the first gate 10.12 and the second gate 10.22 is plate-shaped.

[0178] Specifically, the first gate 10.12 is a rectangular cone with an initial width of 8 mm, an initial height of 1.5 mm, an end width of 8 mm, and an end height of 6 mm along its feeding direction. The wall thickness of the adjacent frame member 3.3 is 2.01 to 2.07 mm, and this part serves as the adjacent boundary of the first light guide 3.21, which has a wall thickness of 2.01 to 2.1 mm.

[0179] Specifically, the second gate 10.22 is a rectangular cone with an initial width of 12mm, an initial height of 1.8mm, an end width of 10mm, and an end height of 6mm along its feeding direction, and the wall thickness of its adjacent frame member 3.3 is 2.51mm.

[0180] Controlling the contours of the first gate 10.12 and the second gate 10.22 facilitates the subsequent trimming of the contour surface of the headlight trim 3.

[0181] like Figure 27 As shown, the third gating channel 10.1 and the fourth gating channel 10.2 are divided into a hot runner channel input from the upper module 1 and a cold runner channel flowing through the hot runner channel onto the lower module 2. The sprue fills the cavity sequentially through the hot runner channel and the cold runner channel. The first gating channel 10.11 and the second gating channel 10.21 constitute the cold runner. Through the above improvements, the cold runner forming auxiliary strips formed on both sides of the frame member 3.3 enable the sprue to fully fill the secondary cavity 1.2 and avoid the influence of the feeding pressure and temperature on the appearance of the decorative surface on the frame member 3.3. At the same time, the quality of the side surface of the frame member 3.3 can be further improved by trimming the auxiliary strips after molding and ejection.

[0182] Furthermore, in this embodiment, the secondary cavity 1.2 is provided with two molding positions for frame members 3.3, and the fourth pouring channel 10.2 is located in the middle of the upper module 1 and connects the two molding positions, so that the two frame members 3.3 are connected by auxiliary strips, thereby increasing the bearing area and improving the ejection effect of the ejection structure 7 on the two frame members 3.3. This helps to reduce the height difference between the two frame members 3.3 during ejection. In other words, this further optimizes the one-time ejection of the two frame members 3.3 and improves work efficiency.

[0183] Based on the aforementioned auxiliary strip, the ejection structure 7 is further provided with an ejection unit 7.2 corresponding to the auxiliary strip to further optimize the ejection effect.

[0184] In this embodiment, with reference to the third pouring channel 10.1 and the fourth pouring channel 10.2, the surface of the headlight trim 3 and its position within the cavity are further explained. The first part 3.4 of the headlight trim 3 is planned as three hollowed-out portions 3.31 in the width direction. From the fourth pouring channel 10.2 toward the third pouring channel 10.1, these are, in sequence, a reserved hollowed-out portion, a hollowed-out portion of the transparent part 3.1, and a hollowed-out portion of the first light guide part 3.21. Furthermore, one end of each of the three hollowed-out portions 3.31 is... Extending to the end of the first part 3.4, and with a reserved cutout located at the end of the cutout position of the transparent part 3.1 towards the end of the second part 3.5, a decorative surface of the headlight trim 3 is formed. This decorative surface has a curved surface that slopes downward from the reserved cutout position towards the cutout position of the transparent part 3.1, and the other end of the cutout position of the first light guide 3.21 extends to the end of the second part 3.5. The cutout position of the first light guide 3.21 is adjacent to the boundary of the headlight trim 3, so that a frame-like structure is formed on both sides of the cutout position of the first light guide 3.21.

[0185] Specifically, in the width direction, from the hollowed-out position of the first light guide 3.21 towards the reserved hollowed-out position, the first part 3.4 is divided into a first frame strip 3.32, a second frame strip 3.33, a third frame strip 3.34 and a fourth frame strip 3.35 by the aforementioned hollowed-out position. The first frame strip 3.32 and the fourth frame strip 3.35 serve as the boundaries of the first part 3.4 and receive the pouring material from the third pouring channel 10.1 and the fourth pouring channel 10.2.

[0186] In terms of molding quality, by controlling the surface and injection position of the headlight trim 3, the weld line is located at the end of the hollowed-out part of the first part 3.4, thereby reducing the impact of the weld line on the appearance of the headlight trim 3.

[0187] To further control the quality of the weld lines on the frame component 3.3, a third pouring channel 10.1 and a fourth pouring channel 10.2 are provided on the left and right sides of the frame component 3.3. The third pouring channel 10.1 and the fourth pouring channel 10.2 are interconnected and their order is controlled by a cylinder valve needle. Preferably, the fourth pouring channel 10.2 is used to input the pouring material before the third pouring channel 10.1.

[0188] exist Figure 29 As can be seen, the second gate 10.22 of the fourth gating channel 10.2 is set at the lower end of the reserved hollow position on the first frame 3.32, so that the molten material of the preferred input fourth gating channel 10.2 can extend to the periphery through the surface of the headlight trim 3. The first gate 10.12 of the third gating channel 10.1 is set in the middle of the fourth frame 3.35 and relatively close to the lower end of the reserved hollow position. Furthermore, the molten material in the third gating channel 10.1 and the fourth gating channel 10.2 is set to be synchronous at the ends of the first and second frame 3.33, so that the weld line is controlled at the end of the hollow position in the first part 3.4, which further optimizes the quality of the weld line.

[0189] For the reserved cutout and the transparent part 3.1 cutout, the weld line is formed by the fusion of the casting material of the fourth casting channel 10.2 on both sides of its end. Since the casting material of the fourth casting channel 10.2 preferentially fills the lower end of the reserved cutout and the transparent part 3.1 cutout through the mold surface, the casting material is fused at the end of the first part 3.4, so the weld line is formed at the lower end of the reserved cutout and the transparent part 3.1 cutout.

[0190] For the hollowed-out position of the first light guide part 3.21, the weld lines at both ends are formed by the fusion of the refractory material filling the second frame 3.33 and originating from the fourth casting channel 10.2, and the refractory material filling the first frame 3.32 and originating from the third casting channel 10.1.

[0191] In other embodiments, it is desirable to further optimize the weld line through wall thickness optimization. In the above embodiments, the uniform wall thickness of the second frame strip 3.33 and the third frame strip 3.34 is approximately 2.51 mm. For the second frame strip 3.33, its wall thickness is controlled to increase by 0.3 mm relative to the circumferential wall thickness of the frame member 3.3, and for the third frame strip 3.34, its wall thickness is controlled to decrease by 0.3 mm relative to the circumferential wall thickness of the frame member 3.3, so that the uniform wall thickness of the second frame strip 3.33 is controlled between 2.80 and 2.81 mm, and the uniform wall thickness of the third frame strip 3.34 is controlled between 2.17 and 2.2 mm, thereby slowing down and accelerating the filling rate of the casting, so as to further control the offset of the weld line toward the end of the hollowed-out position on the first part 3.4.

[0192] In other embodiments, since the slurry is preferentially injected into the general cavity 2.1, the connecting part located at the bottom of the cavity is preferentially filled, so that the temperature of the connecting part is controlled to be relatively lower than that of the rest of the headlight trim 3 during the pressure stabilization and cooling stages, thereby optimizing the structural strength of the connecting part and avoiding deformation during the ejection action.

[0193] A manufacturing process for a rotary three-color two-station mold for a vehicle headlight trim part 3 includes the following steps:

[0194] A1. Analysis of the headlight trim 3: The headlight trim 3 is integrally composed of a frame 3.3, a transparent part 3.1, and a lamp trim 3.2. The headlight trim 3 is divided into a first part 3.4 and a second part 3.5 with different curved surfaces from its middle part to both ends. The upper first part has multiple hollowed-out parts 3.31 in the width direction. The transparent part 3.1 and the lamp trim 3.2 are arranged in the hollowed-out parts 3.31. The lower second part 3.5 is divided in the wall thickness direction into overlapping parts 3.22 formed on the lamp trim 3.2 and the frame 3.3 body, so as to control the frame 3.3, the transparent part 3.1, and the lamp trim 3.2 to have uniform wall thickness.

[0195] A1.1 The headlight trim 3 is formed and positioned. The tangent line connecting the headlight trim 3 on the first part 3.4 and the second part 3.5 forms an angle greater than 90°. The first part 3.4, where the three types of connecting parts 4.3 are located, is arranged to be roughly horizontal, and an upper demolding structure 5 is set. The demolding action is performed by the outer slider 5.2. The second part 3.5, where the first type of connecting part 4.1 is located, is arranged obliquely downward and a lower demolding structure 6 is set. The demolding action is performed by the core-pulling block 6.2. An ejection structure 7 is set, and a first type of ejection unit 7.21 is set for the shape of the headlight trim 3. A second type of ejection unit 7.22 is set for the second type of connecting part 4.2 respectively. A third type of ejection unit 7.23 is arranged at intervals according to the contour of the headlight trim 3.

[0196] A1.2 Positioning of upper and lower modules 2: A general molding block 2.2 is arranged in the lower module 2, and a primary molding block 1.3 and a secondary molding block 1.4 are arranged in the upper module 1. The primary molding block 1.3 and the general molding block 2.2 are separated to form cavities for the transparent part 3.1 and the lighting part 3.2, and the molding part corresponding to the frame part 3.3 on the general molding block 2.2 is closed. The secondary molding block 1.4 and the general molding block 2.2 are separated to form cavities for the frame part 3.3, and the cavities corresponding to the transparent part 3.1 and the lighting part 3.2 on the general molding block 2.2 are closed.

[0197] The upper demolding structure 5 is arranged on the primary molding block and the secondary molding block 1.4, and above the outer end of the cavity. The lower demolding structure 6 is embedded in the lower part of the universal molding block 2.2 and forms part of the surface of the universal cavity 2.1. The ejection structure 7 is inserted through the lower demolding structure 6 and the universal molding block 2.2. The ejection unit 7.2 is distributed in a dot matrix with intervals about the outline and surface of the headlight trim 3. The lower demolding structure 6 and the ejection structure 7 operate in sequence.

[0198] B. Gating design: A first gating assembly 8 is set above the primary cavity 1.1, which is vertically aligned with the middle of the transparent part 3.1. A second gating assembly 9 is set, which extends from the outer end of the upper module 1 as an inlet to the middle of the primary cavity 1.1 and the secondary cavity 1.2, and forms a gating gate at the overlapping part 3.22. A third gating assembly 10 is set above the secondary cavity 1.2, and forms two gating gates on both sides of the width direction of the frame part 3.3. The two gating gates are opposite to the entry direction of the secondary cavity 1.2.

[0199] C. In the first mold closing, the lower demolding structure 6 and the ejection structure 7 maintain the forming position. The outer slider 5.2 is attached to the primary forming block 1.3 and the secondary forming block 1.4 under the pressure of the lower mold group 2. The traction component 5.5 and the traction matching component 5.6 form a transmission. The first gating component 8 is started and controls the filling time of the transparent part 3.1 to 1.638s. The pressure is controlled at 19.61Mpa when the transparent part 3.1 is filled. The second gating component 9 is started and controls the filling time of the lamp part 3.2 to 3s. The pressure is controlled at 86Mpa when the transparent part 3.1 is filled.

[0200] D. In the first mold opening, the upper demolding structure 5 is released with the mold opening action. The outer slider 5.2 performs demolding of the three types of connecting parts 4.3 under the pulling action of the traction part 5.5 and the ejection action of the elastic part 5.4. The lower demolding structure 6 and the ejection structure 7 maintain the forming position. The lower mold group 2 carries the transparent part 3.1 and the lighting part 3.2 and rotates to the bottom of the secondary cavity 1.2.

[0201] E. Secondary mold closing: Step C is executed within the primary cavity 1.1. The third gating component 10 is activated, and the filling time of the frame component 3.3 is controlled to be 2.56s. The pressure is controlled to be 57.53Mpa when the transparent component 3.1 is filled. The frame component 3.3 is integrally molded on the transparent component 3.1 and the lighting component 3.2. A first holding pressure time of 8s is set, and the pressure is controlled to be 80Mpa. A second holding pressure time of 5s is set, and the pressure is controlled to be 60Mpa.

[0202] F. Secondary mold opening: The upper demolding structure 5 is released again, and the first driving element 6.4 is activated, dragging the core-pulling block 6.2 to perform the demolding action and slide relative to the ejection unit 7.2. At this time, the second part 3.5 of the headlight trim 3 is supported by the secondary forming block 1.4. The second driving element 7.3 is activated, and the ejection unit 7.2 performs the demolding action, ejecting the headlight trim 3 obliquely. Step C is repeated.

[0203] Through the above-mentioned process improvements, the maximum shrinkage of the finished headlight trim part 3 is 0.01mm, and the maximum shrinkage in the visible area is 0.006mm, so as to minimize appearance defects. The deformation of the finished product is 0.65mm, which is less than 1mm.

[0204] Material parameters for transparent part 3.1: mold temperature 40 to 80℃, melt temperature 220 to 280℃, ejection temperature 100℃, elastic modulus 2740Mpa, melt index 2g / 10min, density 1.188g / cm3.

[0205] Molding parameters for transparent part 3.1: mold temperature 60℃, melt temperature 250℃, holding pressure 55Mpa, holding time at least 4s.

[0206] Material parameters for lighting components 3.2: mold temperature is 80 to 120℃, melting temperature is 280 to 320℃, ejection temperature is 130℃, elastic modulus is 2400 / 2428Mpa, and density is 1.188g / cm3.

[0207] Molding parameters for lighting component 3.2: mold temperature 100℃, melt temperature 300℃, cooling time 40s, first stage holding time 8s, control pressure 80Mpa, second stage holding time 5s, control pressure 60Mpa.

[0208] Material parameters for frame component 3.3: mold temperature is 80 to 120℃, melt temperature is 280 to 320℃, ejection temperature is 130℃, elastic modulus is 2400 / 2428 MPa, and density is 1.188 g / cm3.

[0209] Molding parameters for frame component 3.3: mold temperature 100℃, melt temperature 300℃, cooling time 70s, first stage holding time 8s, control pressure 80Mpa, second stage holding time 5s, control pressure 60Mpa.

[0210] The flow front temperature of the headlight trim 3 is 20°C, and the volume shrinkage of adjacent positions is less than 3%, with no abrupt changes in shape. This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. Those skilled in the art can make modifications to this embodiment without contributing any inventive step after reading this specification, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present invention.

Claims

1. A rotary three-color two-station mold for automotive headlight trim, comprising an upper mold assembly (1) and a lower mold assembly (2) that close together to form a cavity, characterized in that: The headlight trim (3) includes a transparent part (3.1) and a lamp trim (3.2) spaced apart from each other, and a frame part (3.3) that integrally connects the lamp trim (3.2) and the transparent part (3.1). The headlight trim (3) is curved and its upper part is close to horizontal with the end as the boundary, and its lower part is arranged to extend towards the inside of the cavity. The connecting and mating component (4) includes a first type of connecting part (4.1) formed in the middle of the lamp trim (3.2) and the frame part (3.3), a second type of connecting part (4.2) formed at the lower end of the lamp trim (3.2), and a third type of connecting part (4.3) formed at the upper end of the frame part (3.3). The first type of connecting part (4.1), the second type of connecting part (4.2) and the third type of connecting part (4.3) are arranged on the same side of the lamp trim (3) and are all set at different angles with respect to the mold opening direction. The transparent part (3.1) is divided into an upper first part (3.4) and a lower second part (3.5) by the area near the center of the headlight trim (3). The first part (3.4) is arranged horizontally with the three-type connecting parts (4.3) at its outer end as the endpoints, and the second part (3.5) extends diagonally downwards relative to the first part (3.4). The upper module (1) includes a primary molding block (1.3) and a secondary molding block (1.4), and the lower module (2) includes two oppositely arranged universal molding blocks (2.2). The primary molding block (1.3) matches the universal molding block (2.2) and forms a transparent part (3.1) and a lighting part (3.2). The secondary molding block (1.4) matches the universal molding block (2.2) and forms a frame part (3.3) on the transparent part (3.1) and the lighting part (3.2). The lower module (2) rotates and matches the primary molding block (1.3) or the secondary molding block (1.4). Also includes: The upper demolding structure (5) is set at the outer end of the corresponding cavity of the upper module (1) and has three types of undercuts (5.1) for forming three types of connecting parts (4.3). The three types of undercuts (5.1) move away from the lamp part (3.2) in the primary cavity (1.1) and the frame part (3.3) in the secondary cavity (1.2) as the lower module (2) moves. The lower demolding structure (6) is provided at the bottom of the lower module (2) corresponding to the general molding block (2.2) and has a second type of undercut (6.1) for molding the second type of connection part (4.2), the second type of undercut (6.1) being configured to perform an independent demolding action in the secondary cavity (1.2); An ejector structure (7) is disposed in the lower module (2) and passes through the lower demolding structure (6) and the general molding block (2.2), and has a type of undercut (7.1) for molding a type of connection part (4.1). The ejector structure (7) is configured to perform an independent demolding action in the secondary cavity (1.2), and the lower demolding structure (6) and the ejector structure (7) are arranged to cross each other in the general molding block, or the lower demolding structure (6) and the ejector structure (7) are arranged to intersect on the demolding action trajectory.

2. The rotary three-color two-station mold for automotive headlight decorative parts according to claim 1, characterized in that: The lamp trim (3.2) has a first light guide portion (3.21) facing outward, and the lamp trim (3.2) has an overlapping portion (3.22) supported on the lower part of the frame member (3.3). The first light guide portion (3.21) is adjacent to one side boundary of the frame member (3.3) and extends about the curved surface of the lamp trim (3). The overlapping portion (3.22) is connected to the first light guide portion (3.21) and extends towards the other side boundary of the frame member (3.3). The overlapping portion (3.22) extends at least to the side of the transparent member (3.1) away from the first light guide portion (3.21). The first type of connecting portion (4.1) is evenly distributed about the curved surface direction and the width direction of the lamp trim (3).

3. A rotary three-color two-station mold for automotive headlight decorative parts according to claim 2, characterized in that: The three types of connecting parts (4.3) are formed on the top of the headlight trim (3) and are arranged approximately vertically with respect to the mold opening direction; The second type of connecting part (4.2) is formed at the bottom of the headlight trim (3), the overlapping part (3.22) is formed in the middle of the headlight trim (3), the first type of connecting part (4.1) is evenly distributed at the bottom of the overlapping part (3.22) and the third type of connecting part (4.3), and the second type of connecting part (4.2) and the first type of connecting part (4.1) are arranged approximately perpendicularly.

4. A rotary three-color two-station mold for automotive headlight decorative parts according to claim 1, characterized in that: The upper demolding structure (5) includes an outer slider (5.2) that slides relative to the cavity, an obliquely arranged guide rod (5.3), and an elastic element (5.4) formed on the guide rod (5.3). Three types of undercuts (5.1) are formed on the outer slider (5.2) and match the upper module (1) and the lower module (2). The elastic element (5.4) applies a force to the outer slider (5.2) to obliquely disengage from the three types of connecting parts (4.3), and the outer slider (5.2) is guided to slide on the upper module (1) and the lower module (2) during the mold opening action.

5. A rotary three-color two-station mold for automotive headlight decorative parts according to claim 4, characterized in that: The lower module (2) is provided with a traction member (5.5), and the bottom of the outer slider (5.2) is provided with a traction mating member (5.6). The traction member (5.5) and the traction mating member (5.6) form a transmission mating in the mold closing state, and the outer slider (5.2) moves as the lower module (2) opens. A guide slope (5.7) matching the three types of undercuts (5.1) is provided between the traction member (5.5) and the traction mating member (5.6).

6. A rotary three-color two-station mold for automotive headlight decorative parts according to claim 1, characterized in that: The lower demolding structure (6) includes a core-pulling block (6.2) that together with the lower module (2) forms a profile (6.22), and a variable track slide (6.3) and a first driving element (6.4) for driving the core-pulling block (6.2) to move in the normal direction with respect to the second type of connecting part (4.2). The second type of buckle (6.1) is formed at the end of the core-pulling block (6.2), and the ejection structure (7) passes through the core-pulling block (6.2) and is set at an angle to the second type of buckle (6.1).

7. A rotary three-color two-station mold for automotive headlight decorative parts according to claim 6, characterized in that: The ejection structure (7) includes a plurality of ejection units (7.2) arranged from bottom to top. The ejection unit (7.2) is inclined about the normal of the upper part of the headlight trim (3) and offset toward the lower part of the headlight trim (3). A type of buckle (7.1) is formed on the ejection unit (7.2), and the core-pulling block (6.2) is provided with a through hole (6.21) for the ejection unit (7.2) to pass through. The through hole (6.21) allows the ejection unit (7.2) to move within the core-pulling block (6.2).

8. A rotary three-color two-station mold for automotive headlight decorative parts according to claim 7, characterized in that: The ejection structure (7) includes a top plate (7.5) supporting multiple ejection units (7.2) and a second drive element (7.3). The ejection unit (7.2) is connected to the bottom of the overlapping part (3.22) and the frame member (3.3) corresponding to the three types of connecting parts (4.3). At least a portion of the ejection unit (7.2) has a top block (7.4) which supports and shapes the outer contour of the headlight trim (3).

9. A rotary three-color two-station mold for automotive headlight decorative parts according to claim 2, characterized in that: The upper module (1) also includes: The third gating assembly (10) has a third gating channel (10.1) and a fourth gating channel (10.2) disposed within the cavity and corresponding to the outside of the frame member (3.3). The third gating channel (10.1) is adjacent to the side of the first light guide (3.21), and the fourth gating channel (10.2) is located on the side of the frame member (3.3) away from the third gating channel (10.1). The third gating channel (10.1) is adjacent to the side of the first light guide (3.21) and has an upwardly extending first gating channel (10.11) and a first gate (10.12). 12) The cross-section of the second gate (10.22) is a rectangular cone in the shape of a sheet, and the slurry of the fourth pouring channel (10.2) is set to pass through the decorative surface of the frame member (3.3), and to split at least on both sides of the transparent member (3.1), and to intersect at the end of the upper part of the transparent member (3.1) corresponding to the headlight decorative member (3); the fourth pouring channel (10.2) is set to fill the slurry before the third pouring channel (10.1), and to be synchronized with the slurry of the third pouring channel (10.1) at the end of the first light guide (3.21) near the upper part of the headlight decorative member (3).

10. A manufacturing process for a rotary three-color two-station mold for automotive headlight decorative parts, characterized in that, Includes the following steps: A1. Analysis of the vehicle headlight trim (3): The vehicle headlight trim (3) is integrally composed of a frame (3.3), a transparent part (3.1), and a lamp trim (3.2). The vehicle headlight trim (3) is divided into a first part (3.4) and a second part (3.5) with different curved surfaces from its middle part to both ends. The upper first part (3.4) has multiple hollow parts (3.31) in the width direction. The transparent part (3.1) and the lamp trim (3.2) are arranged in the hollow parts (3.31). The lower second part (3.5) is divided in the wall thickness direction into an overlapping part (3.22) formed on the lamp trim (3.2) and the frame (3.3) body, so as to control the frame (3.3), the transparent part (3.1), and the lamp trim (3.2) to have uniform wall thickness. A1.1 The headlight trim (3) is formed and positioned. The tangent line connecting the headlight trim (3) on the first part (3.4) and the second part (3.5) forms an angle greater than 90°. The first part (3.4) where the three types of connecting parts (4.3) are located is arranged to be roughly horizontal, and an upper demolding structure (5) is set. The demolding action is performed by the outer slider (5.2). The second part (3.5) where the first type of connecting part (4.1) is located is arranged obliquely downward and a lower demolding structure (6) is set. The demolding action is performed by the core block (6.2). An ejection structure (7) is set. A first type of ejection unit (7.21) is set according to the surface of the headlight trim (3). A second type of ejection unit (7.22) is set according to the second type of connecting part (4.2). A third type of ejection unit (7.23) is arranged at intervals according to the contour of the headlight trim (3). A1.2 Positioning of upper and lower modules (2): A general molding block (2.2) is arranged in the lower module (2), and a primary molding block (1.3) and a secondary molding block (1.4) are arranged in the upper module (1). The primary molding block (1.3) and the general molding block (2.2) are separated to form the cavity of the transparent part (3.1) and the lighting part (3.2), and the molding part of the corresponding frame part (3.3) on the general molding block (2.2) is closed. The secondary molding block (1.4) and the general molding block (2.2) are separated to form the cavity of the frame part (3.3), and the cavity of the corresponding transparent part (3.1) and the lighting part (3.2) on the general molding block (2.2) is closed. The upper demolding structure (5) is arranged on the primary molding block and the secondary molding block (1.4), and above the outer end of the cavity. The lower demolding structure (6) is embedded in the lower part of the general molding block (2.2) and forms part of the surface of the general cavity (2.1). The ejection structure (7) is inserted through the lower demolding structure (6) and the general molding block (2.2). The ejection unit (7.2) is distributed in a dot matrix with respect to the outline and surface of the headlight trim (3). The lower demolding structure (6) and the ejection structure (7) move in sequence. B. Gating design: A first gating assembly (8) is set above the primary cavity (1.1), which is vertically facing the middle of the transparent part (3.1). A second gating assembly (9) is set, which extends from the outer end of the upper module (1) as an entrance to the middle of the primary cavity (1.1) and the secondary cavity (1.2), and forms a gating gate at the overlapping part (3.22). A third gating assembly (10) is set above the secondary cavity (1.2), and forms two gating gates on both sides of the width direction of the frame part (3.3). The two gating gates are opposite to the entry direction of the secondary cavity (1.2). C. In the first mold closing, the lower demolding structure (6) and the ejection structure (7) maintain the molding position. The outer slider (5.2) is attached to the first molding block (1.3) and the second molding block (1.4) under the pressure of the lower mold group (2). The traction component (5.5) and the traction matching component (5.6) form a transmission. The first casting component (8) is started and controls the filling time of the transparent part (3.1) to 1.638s. The pressure control during the speed / pressure switching is 19.61Mpa. The second casting component (9) is started and controls the filling time of the lamp part (3.2) to 3s. The pressure control during the speed / pressure switching is 86Mpa. D. In the first mold opening, the upper demolding structure (5) is released with the mold opening action. The outer slider (5.2) performs the demolding of the three types of connecting parts (4.3) under the pulling action of the traction part (5.5) and the ejection action of the elastic part (5.4). The lower demolding structure (6) and the ejection structure (7) maintain the forming position. The lower mold assembly (2) carries the transparent part (3.1) and the lighting part (3.2) to rotate to the bottom of the secondary cavity (1.2). E. Secondary mold closing: Step C is executed within the primary cavity (1.1). The third gating component (10) is activated, and the filling time of the frame component (3.3) is controlled to be 2.56s. The pressure control during speed / pressure switching is 57.53Mpa. The frame component (3.3) is integrally molded on the transparent component (3.1) and the lighting component (3.2). A first-stage holding pressure time of 8s is set, with a controlled pressure of 80Mpa. A second-stage holding pressure time of 5s is set, with a controlled pressure of 60Mpa. Mpa; F, Secondary mold opening, the upper demolding structure (5) is released again, and the first driving element (6.4) is activated, dragging the core-pulling block (6.2) to perform the demolding action and slide relative to the ejection unit (7.2). At this time, the second part (3.5) of the headlight decoration part (3) is supported by the secondary forming block (1.4). The second driving element (7.3) is activated, the ejection unit (7.2) performs the demolding action, and the headlight decoration part (3) is ejected obliquely. Step CF is repeated.

Images