Multi-ejecting automobile tail lamp injection molding mold

Abstract

This utility model belongs to the field of mold technology, and particularly relates to a multi-ejection type injection mold for automotive taillights. This utility model includes a lower mold and an upper mold for automotive taillights. An injection molded part is located on top of the upper mold, and a molding cavity for the plastic part is located at the bottom of the upper mold. A molding protrusion for the plastic part is located on the lower mold. In use, this utility model employs a multi-ejection structure consisting of a slanted ejector, multiple-specification straight ejectors, and independently driven dual sliding plates. The central slanted ejector solves the problem of undercut demolding. The thin side ejector rods and the thick central ejector rod provide differentiated ejection for different parts. The staggered layout of the dual sliding plates and the cavity avoidance design achieve interference-free movement, forming a collaborative demolding logic of "core pulling first, then pushing," thus solving the demolding deformation problem of complex plastic parts.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a multi-ejection type automotive taillight injection molding mold. Background Technology

[0002] In the automotive manufacturing industry, taillights are key exterior and functional components, and their production quality and efficiency directly impact the overall vehicle quality and production schedule. Traditional automotive taillight injection molding molds suffer from several technical challenges: Firstly, automotive taillights have complex structures, often including curved surfaces, undercuts, and unevenly thick ribs. A single ejection method (such as only straight ejection or single angled ejection) easily leads to uneven stress on the plastic part during demolding, resulting in deformation, cracking, or surface scratches, and a generally low yield rate. Secondly, traditional mold cooling systems are mostly localized, circuitous water channels with long and unevenly distributed cooling paths, resulting in long cooling cycles for the plastic part and making it prone to defects such as shrinkage marks and warping due to internal and external temperature differences. In addition, layout conflicts between ejection components, cooling systems, and injection systems often lead to structural interference, further limiting demolding efficiency and cooling effect. Therefore, there is an urgent need for a multi-ejection automotive taillight injection molding mold that can adapt to complex structures, efficiently demold, and provide uniform cooling.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, a Chinese patent discloses a two-color injection molding die for automotive taillights [Application No.: 201822267475.3], which includes an upper mold plate and a lower mold plate. Several fixing grooves are provided on the upper mold plate, and pressure blocks are provided on the fixing grooves. Fixing holes are provided on the pressure blocks, and connecting holes are provided on the fixing grooves. The pressure blocks are fixed to the fixing grooves by connecting bolts, and the fixing holes are countersunk threaded holes. However, this solution still easily causes deformation of the plastic part during the ejection process, resulting in a low yield rate. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing a multi-ejection type automotive taillight injection molding mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A multi-ejection type automotive taillight injection molding die includes a lower taillight molding die and an upper taillight molding die. An injection molded part is disposed on the upper taillight molding die, and a molding cavity for the plastic part is disposed at the bottom of the upper taillight molding die. A molding protrusion for the plastic part is disposed on the lower taillight molding die. The molding cavity and the molding protrusion are positioned and matched in shape. An upper mold through-cooling structure is provided within the upper taillight molding die, and a lower mold through-cooling structure is provided within the lower taillight molding die. A multi-ejection assembly is disposed below the lower taillight molding die, and the multi-ejection assembly passes through the lower taillight molding die and corresponds to the position of the molding protrusion.

[0007] In the above-mentioned multi-ejection type automotive taillight injection molding mold, the multi-ejection assembly includes a first ejector plate and a second ejector plate disposed below the lower mold of the automotive taillight. The first ejector plate is provided with a central inclined ejector demolding component, and the second ejector plate is provided with a multi-directional straight ejector component. The central inclined ejector demolding component and the multi-directional straight ejector component are arranged alternately.

[0008] In the above-mentioned multi-ejection automotive taillight injection molding die, the central inclined ejector includes a connecting slide seat disposed on the first ejection slide plate, an inclined ejector rod slidably connected to the connecting slide seat, and an auxiliary molding ejector module provided at the top of the inclined ejector rod, the auxiliary molding ejector module slidingly engaging with the plastic part molding protrusion.

[0009] In the above-mentioned multi-ejection automotive taillight injection molding mold, a cavity is provided in the second ejection slide, and the connecting slide and the inclined ejector rod pass through the cavity.

[0010] In the above-mentioned multi-ejection automotive taillight injection molding mold, the multi-directional straight ejector includes a side fine ejector and a middle coarse ejector set on the second ejector slide plate, and the side fine ejector and the middle coarse ejector are respectively staggered with the inclined ejector rod.

[0011] In the above-mentioned multi-ejection type automotive taillight injection molding mold, the side fine ejection part includes a plurality of side fine ejection rods disposed on the second ejection slide plate, and the side fine ejection rods pass through the plastic part forming protrusion.

[0012] In the above-mentioned multi-ejection type automotive taillight injection molding mold, the central coarse ejection section includes a plurality of central coarse ejection rods disposed on the second ejection slide plate, and the central coarse ejection rods pass through the plastic part forming protrusion.

[0013] In the aforementioned multi-ejection type automotive taillight injection molding die, the diameter of the central coarse ejector rod is larger than the diameter of the side fine ejector rod.

[0014] In the above-mentioned multi-ejection type automotive taillight injection molding mold, the injection molded part includes an injection main board, an injection manifold, and several injection tubes disposed above the upper mold of the automotive taillight.

[0015] In the above-mentioned multi-ejection type automotive taillight injection molding mold, the upper mold direct cooling structure includes a plurality of upper mold direct cooling pipes disposed in the upper mold of automotive taillight molding, and the lower mold direct cooling structure includes a plurality of lower mold direct cooling pipes disposed in the lower mold of automotive taillight molding.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. In use, this utility model adopts a multi-ejection structure of inclined ejector + multi-specification straight ejector + independent drive of double slide plates. The central inclined ejector demolding component solves the problem of undercut demolding. The side thin ejector rod and the central thick ejector rod are used for differentiated ejection of different parts. The staggered layout of the double slide plates and the cavity avoidance design realize interference-free movement, forming a collaborative demolding logic of "pulling the core first and then pushing", which solves the demolding deformation problem of complex plastic parts.

[0018] 2. This utility model addresses the structural characteristics of automobile taillights, which are characterized by "thin-walled edges and a large central area". It innovatively designs ejector rods with differentiated diameters (the diameter of the thicker ejector rod in the middle is larger than that of the thinner ejector rod on the side). Combined with the lateral force of the inclined ejector, it forms a multi-dimensional and regional ejection force distribution, which makes the demolding force of each part of the plastic part match the structural strength, reduces the deformation rate, and is significantly better than the deformation rate of traditional molds.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a partial cross-sectional schematic diagram of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of the present invention.

[0023] Figure 4 This is a partial structural schematic diagram of another aspect of this utility model.

[0024] Figure 5 This is a partial structural schematic diagram of another aspect of this utility model.

[0025] In the diagram: 1. Lower mold for automotive taillight forming; 2. Upper mold for automotive taillight forming; 3. Injection part; 4. Molding cavity for plastic part; 5. Molding protrusion for plastic part; 6. Upper mold direct cooling structure; 7. Lower mold direct cooling structure; 8. Multiple ejection assembly; 9. First ejection slide plate; 10. Second ejection slide plate; 11. Central angled ejector; 12. Multi-directional straight ejector; 13. Connecting slide; 14. Angled ejector rod; 14. Auxiliary molding ejector module; 15. Side fine ejector section; 16. Central coarse ejector section; 17. Side fine ejector rod; 18. Central coarse ejector rod; 19. Injection main board; 20. Injection manifold; 21. Injection tube; 22. Upper mold direct cooling pipe; 23. Lower mold direct cooling pipe. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings.

[0027] like Figure 1-5 As shown, a multi-ejection type automotive taillight injection molding die includes a lower taillight molding die 1 and an upper taillight molding die 2. An injection molded part 3 is provided above the upper taillight molding die 2, and a molding cavity 4 is provided at the bottom of the upper taillight molding die 2. A molding protrusion 5 is provided on the lower taillight molding die 1. The molding cavity 4 and the molding protrusion 5 are positioned and matched in shape. An upper mold through-cooling structure 6 is provided inside the upper taillight molding die 2, and a lower mold through-cooling structure 7 is provided inside the lower taillight molding die 1. A multi-ejection assembly 8 is provided below the lower taillight molding die 1, and the multi-ejection assembly 8 passes through the lower taillight molding die 1 and corresponds to the position of the molding protrusion 5.

[0028] In this embodiment, during the injection molding process, the upper mold 2 and the lower mold 1 for forming the taillight are arranged vertically in correspondence. During mold closing, they are precisely positioned by a guiding mechanism (not shown in the figure). The plastic part forming cavity 4 at the bottom of the upper mold 2 and the plastic part forming protrusion 5 at the top of the lower mold 1 are complementary in shape, together forming a complete cavity for the taillight. The cavity outline is completely consistent with the finished taillight structure. The injection molded part 3 is fixed at the top center of the upper mold 2, and its injection channel communicates with the cavity to inject molten plastic into the cavity. The upper mold through-cooling structure 6 is embedded inside the upper mold 2. The lower mold direct-through cooling structure 7 is embedded inside the lower mold 1 for forming the car taillight. Both are evenly distributed along the cavity contour and achieve circulating cooling through an external cooling system. The multiple ejection assembly 8 is installed directly below the lower mold 1 for forming the car taillight. Its top ejector penetrates the lower mold 1 for forming the car taillight and extends to the key stress point of the plastic part forming protrusion 5, ensuring that the ejection force acts directly on the plastic part during demolding. The precise fit of the cavity ensures the shape accuracy of the plastic part. The injection molded part 3 achieves uniform plastic filling. The direct-through cooling structure quickly removes heat and shortens the cooling time. The multiple ejection assembly 8 provides targeted ejection force for demolding complex structures and avoids damage to the plastic part.

[0029] Combination Figure 1-5 As shown, the multi-ejection assembly 8 includes a first ejection slide plate 9 and a second ejection slide plate 10 disposed below the lower mold 1 for forming the taillight. The first ejection slide plate 9 is provided with a central inclined ejector 11, and the second ejection slide plate 10 is provided with a multi-directional straight ejector 12. The central inclined ejector 11 and the multi-directional straight ejector 12 are arranged alternately.

[0030] Specifically, the first ejector plate 9 and the second ejector plate 10 of the multi-ejection assembly 8 are stacked in parallel, with the first ejector plate 9 located below and the second ejector plate 10 located above. Both are parallel to the bottom of the lower mold 1 for forming the automotive taillight. The upper surface of the first ejector plate 9 is fixed with bolts to the central inclined ejector demolding component 11, and the upper surface of the second ejector plate 10 is fixed with the multi-directional straight ejector component 12 at the corresponding position. The central inclined ejector demolding component 11 and the multi-directional straight ejector component 12 are spatially staggered, meaning that the movement path of the central inclined ejector demolding component 11 and the movement path of the multi-directional straight ejector component 12 do not overlap, thus avoiding structural interference during the ejection process. The independent drive of the two ejector plates enables ejection sequence control (either inclined ejection followed by straight ejection or simultaneous ejection). The staggered layout avoids interference, and the multi-ejection method adapts to the demolding requirements of different parts of the plastic part, improving demolding stability.

[0031] The central inclined ejector 11 includes a connecting slide 13 disposed on the first ejection slide plate 9. An inclined ejector rod 14 is slidably connected to the connecting slide 13. An auxiliary molding ejector module 144 is provided at the top of the inclined ejector rod 14. The auxiliary molding ejector module 144 is slidably engaged with the plastic part molding protrusion 5.

[0032] In this embodiment, the connecting slide 13 of the central inclined ejector 11 is fixed to the upper surface of the first ejector slide 9 by welding or bolting. The connecting slide 13 has an inclined sliding groove inside, and the bottom of the inclined ejector rod 14 is embedded in the sliding groove and can slide along the groove. The top of the inclined ejector rod 14 is integrally formed or bolted to the auxiliary molding ejector module 144. The shape of the auxiliary molding ejector module 144 is complementary to the undercut or complex curved surface structure on the plastic part molding protrusion 5, and maintains a sliding gap of 0.1-0.2mm with the surface of the plastic part molding protrusion 5. When the first ejector slide 9 rises, the inclined ejector rod 14 slides upward along the inclined groove of the connecting slide 13, driving the auxiliary molding ejector module 144 to move obliquely, which not only completes the molding of the undercut part of the plastic part, but also realizes the lateral core pulling during demolding, solving the problem that traditional straight ejectors cannot handle undercuts.

[0033] Combination Figure 4 As shown, a cavity is provided inside the second ejector slide plate 10, and the connecting slide block 13 and the inclined push rod 14 pass through the cavity.

[0034] In this embodiment, a through cavity is provided inside the second ejector plate 10 at the position corresponding to the connecting slide 13 and the inclined push rod 14. The cross-sectional dimension of the cavity is larger than the maximum outer diameter of the connecting slide 13 and the inclined push rod 14, and the height of the cavity is slightly larger than the movement stroke of the connecting slide 13 and the inclined push rod 14. The connecting slide 13 and the inclined push rod 14 pass through the cavity, and the two maintain a safe gap of 5-10mm with the inner wall of the cavity. The cavity provides movement space for the connecting slide 13 and the inclined push rod 14, completely avoiding structural interference between the first ejector plate 9 and the second ejector plate 10 when they move independently, and ensuring the independence and stability of the ejection action of the two ejector plates.

[0035] The multi-directional straight ejector 12 includes a side narrow ejector portion 15 and a middle coarse ejector portion 16 disposed on the second ejector slide plate 10. The side narrow ejector portion 15 and the middle coarse ejector portion 16 are respectively staggered with the inclined ejector rod 14.

[0036] In this embodiment, the side fine ejection portion 15 and the middle coarse ejection portion 16 of the multi-directional straight ejector 12 are both vertically fixed to the upper surface of the second ejection slide plate 10. The side fine ejection portion 15 is distributed in the edge area of ​​the plastic part forming protrusion 5, and the middle coarse ejection portion 16 is distributed in the center area of ​​the plastic part forming protrusion 5. The distribution positions of the two are staggered from the position of the inclined ejector 14, that is, the inclined ejector 14 is located in the gap between the side fine ejection portion 15 and the middle coarse ejection portion 16. The differentiated ejection layout of the side and the middle provides precise ejection force for the force requirements of different areas of the plastic part. The edge fine ejection avoids deformation of thin-walled parts, and the middle coarse ejection ensures stable demolding of large-area plastic parts. The staggered distribution further avoids interference with the inclined ejector 14.

[0037] Combination Figure 4-5 As shown, the side ejection portion 15 includes a plurality of side ejection rods 17 disposed on the second ejection slide plate 10, and the side ejection rods 17 pass through the plastic part forming protrusion 5.

[0038] In this embodiment, several side ejector rods 17 of the side ejector portion 15 are vertically welded or threaded to the upper surface of the second ejector slide plate 10. A through guide hole is provided at the corresponding position of the plastic part forming protrusion 5. The top of the side ejector rod 17 passes through the guide hole and the top end is flush with the surface of the plastic part forming protrusion 5 (participating in the molding during injection and pushing the plastic part during demolding).

[0039] The central coarse ejection section 16 includes a plurality of central coarse ejection rods 18 disposed on the second ejection slide plate 10, and the central coarse ejection rods 18 pass through the plastic part forming protrusion 5.

[0040] In this embodiment, several central coarse ejection rods 18 of the central coarse ejection section 16 are vertically fixed to the upper surface of the second ejection slide plate 10. A guide hole with a large diameter is opened in the central area of ​​the plastic part forming protrusion 5. The central coarse ejection rods 18 pass through the guide hole, and the top end is flush with the surface of the plastic part forming protrusion 5, corresponding to the large area of ​​the plastic part. The coarse ejection rods have a large contact area and uniform ejection force, which can stably push the large area of ​​the central part of the plastic part, avoid excessive force on a single point causing the plastic part to sink, and improve the stability of the demolding process.

[0041] Combination Figure 4-5 As shown, the diameter of the central coarse ejector rod 18 is larger than the diameter of the side fine ejector rod 17.

[0042] In this embodiment, the diameter of the central thick ejector rod 18 is larger than the diameter of the side thin ejector rod 17. The differential diameter design adapts to the load-bearing requirements of different parts. The thick ejector rod provides a large ejection force to cope with large-area plastic parts, while the thin ejector rod achieves precise pushing in a narrow space, taking into account both ejection effect and space utilization.

[0043] Combination Figure 1-3 As shown, the injection molded part 3 includes an injection main board 19, an injection manifold 20, and several injection tubes 21 disposed above the upper mold 2 for forming the taillight.

[0044] In this embodiment, the injection molding main plate 19 of the injection molded part 3 is fixed to the top of the upper mold 2 for forming the car taillight. The injection manifold 20 is located below the injection molding main plate 19 and embedded inside the upper mold 2 for forming the car taillight. One end of the injection tube 21 is connected to the manifold port of the injection manifold 20, and the other end extends to the gate position at the edge of the cavity. During injection, molten plastic enters from the injection molding main plate 19, is evenly distributed to each injection tube 21 by the injection manifold 20, and then injected into the cavity through the gate.

[0045] Combination Figure 4-5As shown, the upper mold through-cooling structure 6 includes a plurality of upper mold through-cooling pipes 22 disposed in the upper mold 2 for forming automobile taillights, and the lower mold through-cooling structure 7 includes a plurality of lower mold through-cooling pipes 23 disposed in the lower mold 1 for forming automobile taillights.

[0046] In this embodiment, several upper mold direct cooling pipes 22 of the upper mold direct cooling structure 6 are evenly distributed along the contour of the plastic part molding cavity 4 and embedded inside the upper mold 2 for molding the car taillight, with both ends connected to the external cooling system; several lower mold direct cooling pipes 23 of the lower mold direct cooling structure 7 are distributed along the contour of the plastic part molding protrusion 5 and embedded inside the lower mold 1 for molding the car taillight, and are also connected to the cooling system. The cooling medium (such as water) flows unidirectionally in the pipes, directly carrying away the heat around the cavity. The direct pipes shorten the cooling path and improve the heat exchange efficiency; the even distribution of multiple pipes ensures that the cooling speed of each area of ​​the cavity is consistent, reduces the temperature difference between the inside and outside of the plastic part, reduces the risk of warping and shrinkage marks, and shortens the cooling cycle.

[0047] The working principle of this utility model is as follows:

[0048] During the injection molding process, molten plastic enters the mold cavity through the injection tube 21. The injection main plate 19 transmits the injection pressure to the injection manifold 20, which evenly distributes the plastic to each injection tube 21, ensuring that the plastic fills the cavity between the plastic part forming cavity 4 and the plastic part forming protrusion 5. The upper mold direct cooling structure 6 and the lower mold direct cooling structure 7 begin to work, and the cooling medium circulates in the direct cooling tubes, absorbing the heat of the mold and rapidly cooling the plastic in the mold and cavity. When the plastic part has cooled to a certain degree, the moving platen of the injection molding machine drives the lower mold 1 of the car taillight forming mold to move downward, realizing mold opening. After mold opening... First, the first ejector slide 9 is driven to move, which in turn drives the connecting slide 13 and the angled ejector rod 14 to move. The angled ejector rod 14 slides upward at a certain angle, and the auxiliary molding demolding module 144 gradually pushes the plastic part to separate from the plastic part molding protrusion 5, completing the demolding of the special structural part in the middle of the plastic part. Then, the second ejector slide 10 is driven to move, and the side thin ejector rod 17 and the middle thick ejector rod 18 on the second ejector slide 10 move upward. The side thin ejector rod 17 ejects the side part of the plastic part, and the middle thick ejector rod 18 ejects the larger area in the middle of the plastic part, completely ejecting the plastic part from the plastic part molding protrusion 5, completing the entire demolding process.

[0049] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0050] Although this article frequently uses terms such as 1. lower mold for automotive taillights, 2. upper mold for automotive taillights, 3. injection molded part, 4. molding cavity for plastic part, 5. molding protrusion for plastic part, 6. upper mold direct cooling structure, 7. lower mold direct cooling structure, 8. multiple ejection assembly, 9. first ejection slide plate, 10. second ejection slide plate, 11. central angled ejector, 12. multi-directional straight ejector, 13. connecting slide, 14. angled ejector rod, 14. auxiliary molding ejector module, 15. side fine ejector, 16. central coarse ejector, 17. side fine ejector rod, 18. central coarse ejector rod, 19. injection main board, 20. injection manifold, 21. injection tube, 22. upper mold direct cooling pipe, 23. lower mold direct cooling pipe, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A multi-ejection type automotive taillight injection molding die, comprising a lower automotive taillight molding die (1) and an upper automotive taillight molding die (2), characterized in that, The upper mold (2) for forming the car taillight is provided with an injection molded part (3) above it. The lower mold (2) for forming the car taillight is provided with a plastic part forming cavity (4) at its bottom. The lower mold (1) for forming the car taillight is provided with a plastic part forming protrusion (5). The plastic part forming cavity (4) and the plastic part forming protrusion (5) are positioned and matched in shape. The upper mold (2) for forming the car taillight is provided with an upper mold through cooling structure (6). The lower mold (1) for forming the car taillight is provided with a lower mold through cooling structure (7). The lower mold (1) for forming the car taillight is provided with a multi-ejection assembly (8) below it. The multi-ejection assembly (8) passes through the lower mold (1) for forming the car taillight and is positioned corresponding to the plastic part forming protrusion (5).

2. The multi-ejection type automotive taillight injection mold according to claim 1, characterized in that, The multiple ejection assembly (8) includes a first ejection slide plate (9) and a second ejection slide plate (10) disposed below the lower mold (1) for forming automobile taillights. The first ejection slide plate (9) is provided with a central inclined ejector (11), and the second ejection slide plate (10) is provided with a multi-directional straight ejector (12). The central inclined ejector (11) and the multi-directional straight ejector (12) are arranged alternately.

3. The multi-ejection type automotive taillight injection mold according to claim 2, characterized in that, The central inclined ejector (11) includes a connecting slide (13) disposed on the first ejector slide (9), an inclined ejector rod (14) is slidably connected on the connecting slide (13), and an auxiliary molding ejector module (144) is provided at the top of the inclined ejector rod (14), which is slidably engaged with the plastic part molding protrusion (5).

4. The multi-ejection type automotive taillight injection mold according to claim 3, characterized in that, The second ejector slide (10) has a cavity, through which the connecting slide (13) and the inclined push rod (14) pass.

5. The multi-ejection type automotive taillight injection mold according to claim 4, characterized in that, The multi-directional straight ejector (12) includes a side narrow ejector (15) and a middle coarse ejector (16) disposed on the second ejector slide plate (10), and the side narrow ejector (15) and the middle coarse ejector (16) are respectively staggered with the inclined ejector rod (14).

6. The multi-ejection type automotive taillight injection mold according to claim 5, characterized in that, The side ejection section (15) includes a plurality of side ejection rods (17) disposed on the second ejection slide plate (10), the side ejection rods (17) passing through the plastic forming protrusion (5).

7. The multi-ejection type automotive taillight injection mold according to claim 6, characterized in that, The central coarse ejection section (16) includes a plurality of central coarse ejection rods (18) disposed on the second ejection slide plate (10), and the central coarse ejection rods (18) pass through the plastic part forming protrusion (5).

8. The multi-ejection type automotive taillight injection mold according to claim 7, characterized in that, The diameter of the central coarse ejector rod (18) is larger than the diameter of the side fine ejector rod (17).

9. The multi-ejection type automotive taillight injection mold according to claim 1, characterized in that, The injection molded part (3) includes an injection main board (19), an injection manifold (20), and several injection tubes (21) disposed above the upper mold (2) for forming the taillight.

10. The multi-ejection type automotive taillight injection mold according to claim 1, characterized in that, The upper mold through-cooling structure (6) includes a plurality of upper mold through-cooling pipes (22) disposed in the upper mold (2) for forming automobile taillights, and the lower mold through-cooling structure (7) includes a plurality of lower mold through-cooling pipes (23) disposed in the lower mold (1) for forming automobile taillights.

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