High-precision automobile lamp forming die

Abstract

The utility model relates to a car lamp forming die technical field, especially a high -precision type car lamp forming die, including fixed mode, the upper of fixed mode is equipped with movable die, is equipped with the material hole of toping of the top of fixed mode, is equipped with lower tight sliding sleeve in the material hole of toping, is equipped with die holder and guide rod on fixed mode, is equipped with guide hole and core on movable die, is equipped with upper tight sliding sleeve in the guide hole, is equipped with guide sliding groove and mounting hole on the die holder, is equipped with cylinder on the die holder, is equipped with cylinder rod on the cylinder, is equipped with the material plate of toping on the cylinder rod, is equipped with the top rod on the material plate of toping, the sliding connection has the sliding plate in the guide sliding groove, is equipped with inclined bracing and cross bracing on the sliding plate, is equipped with ball groove on the sliding plate. The precision of preventing air invasion in the injection molding process is improved, the stable guiding precision of the molded product in the cavity of the fixed mode on the forming die for the circular shape car lamp shell is improved, and the toping smoothness of the four circular shape car lamp shell finished products of injection molding is improved.

Description

Technical Field

[0001] This utility model relates to the field of automotive headlight forming mold technology, and in particular to a high-precision automotive headlight forming mold. Background Technology

[0002] There are many different shapes and styles of headlight housings. Round headlight housings have advantages such as good light focusing effect, uniform light distribution, and strong versatility, and are often used in vehicles such as Jeep Wrangler, MINI Cooper, and Morgan.

[0003] The round headlight housings are all manufactured using a one-piece injection mold. The specific process is as follows: the moving mold moves downward under high pressure and closes with the fixed mold below. Then, the dried plastic granules are heated to a molten state in the barrel, and then the melt is injected into the mold cavity at high pressure and high speed through the screw. Next, the mold is kept in a closed state, and the product is fully cooled and shaped in the cavity through the cooling water channel. Then, the moving mold moves and opens, and finally, the ejection system ejects the finished round headlight housing.

[0004] Currently, the existing molds for round headlight housings have a relatively low overall sealing degree when the moving mold and the fixed mold below are closed, which easily allows external air to intrude. This greatly reduces the overall sealing degree of the molds for round headlight housings when they are closed, and significantly reduces the precision required to prevent air intrusion during the injection molding process.

[0005] In addition, to improve production efficiency, four cavities are generally set in the fixed mold. Combined with the four cores in the moving mold, four round car light housings can be injection molded simultaneously. The ejection system used is generally to set an ejector plate on the cylinder rod of a single cylinder, and weld four ejector rods on the ejector plate to eject the four cavities respectively. This operation of raising and lowering four ejector rods simultaneously by a single cylinder is prone to shaking, which greatly reduces the stability and precision of the molded product in the fixed mold cavity for ejecting the round car light housing.

[0006] Therefore, we designed a molding die for a round headlight housing to meet the needs of practical applications. Utility Model Content

[0007] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a high-precision automotive headlight molding die.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: Design a high-precision automotive headlight forming mold, including a fixed mold, a movable mold above the fixed mold, a cavity and a hot runner on the fixed mold, an ejector hole on the fixed mold, a lower sliding sleeve inside the ejector hole, a mold base and a guide rod on the fixed mold, a sealing inner frame and a casting pipe on the movable mold, a guide hole and a core on the movable mold, an upper sliding sleeve inside the guide hole, a guide groove and a mounting hole on the mold base, a cylinder on the mold base, a cylinder rod on the cylinder, an ejector plate on the cylinder rod, an ejector rod on the ejector plate, and a sliding plate slidably connected in the guide groove; The sliding plate is provided with a diagonal brace and a horizontal brace, and the top rod is provided with a reinforcing rib. The guide groove is provided with a smooth layer, and the slide plate is provided with a ball groove, with a top ball inside the ball groove.

[0009] In detail, the guide rod and guide hole are a set, and there are four sets symmetrically arranged in total. The guide hole is pressed and sealed to the guide rod through an upper tight sliding sleeve.

[0010] In detail, the sealing inner frame is a frame-shaped structure and is set on the inner wall of the moving mold. The ejector hole and the lower sealing sleeve are a set, and there are a total of four sets symmetrically arranged. The ejector hole is pressed and sealed by the ejector rod through the lower sealing sleeve.

[0011] In detail, the mold base is an inverted "∏" shaped structure, the slide plate and the guide groove are a set, and there are two sets symmetrically arranged. The angle between the inclined support plate and the horizontal plane is 60 degrees.

[0012] In detail, the retaining rib is a triangular structure and is located between the top plate and the top rod. There are four retaining ribs arranged in a circle.

[0013] In detail, the ball groove and the top ball are a set, and there are two sets arranged symmetrically. Each set has six balls arranged vertically. Two-thirds of the top ball is rolled and engaged in the ball groove.

[0014] In detail, the smooth layer is uniformly coated along the inner wall of the guide groove and has a thickness of 100 to 120 micrometers.

[0015] The design scheme proposed in this utility model has the following beneficial effects in application: 1. This utility model provides a sealing inner frame structure within the moving mold, an upper sealing sliding sleeve structure within the guide hole, and a lower sealing sliding sleeve structure at the bottom of the fixed mold. When the moving mold moves downward and closes with the fixed mold, the moving mold completely seals the outer wall of the fixed mold through the sealing inner frame. Simultaneously, the guide rod achieves a sliding seal between the upper sealing sliding sleeve and the guide hole, and the ejector rod also achieves a sliding seal between the lower sealing sliding sleeve and the ejector hole. This improves the overall precision of preventing air intrusion during the injection molding process.

[0016] 2. This utility model sets up a mold base with a guide groove, and sets a sliding plate in the guide groove. Then, it sets an inclined support plate and a horizontal support plate between the sliding plate and the top plate. At the same time, it sets a rib structure between the top rod and the top plate. When the material is ejected by the cylinder, the top plate and the top rod are moved upward in a stable and guided manner, avoiding shaking. Overall, it greatly improves the stability and precision of the upward ejection of the molded product in the cavity of the fixed mold on the molding mold for the round car headlight housing.

[0017] 3. This utility model improves the smoothness of ejecting four round car headlight housings by opening multiple sets of ball grooves on the slide plate, setting a top ball structure in each ball groove for rolling engagement, and setting a smooth layer structure. When ejecting material upwards, the slide plate can be smoothly connected between the guide grooves, thereby improving the ejection smoothness of the four round car headlight housings after injection molding. Attached Figure Description

[0018] Figure 1 This is an exploded three-dimensional schematic diagram of the moving mold in the unsealed cover state of this utility model; Figure 2 This is a first-view perspective three-dimensional schematic diagram of the moving mold of this utility model in a sealed and covered state. Figure 3 For the present utility model Figure 1 A three-dimensional schematic diagram of the bottom view of the moving mold; Figure 4 This is a second-view perspective three-dimensional schematic diagram of the moving mold of this utility model in a sealed and covered state. Figure 5 For the present utility model Figure 2 A three-dimensional schematic diagram of the sliding plate and the reinforcing ribs; Figure 6 For the present utility model Figure 5 A three-dimensional schematic diagram of a skateboard with a top ball bearing.

[0019] In the diagram: 1 Fixed mold; 10 Ejector hole; 101 Lower sliding sleeve; 11 Cavity; 12 Hot runner; 13 Guide rod; 2 Moving mold; 20 Sealing inner frame; 21 Casting pipe; 22 Core; 3 Guide hole; 31 Upper sliding sleeve; 4 Mold base; 41 Mounting hole; 42 Guide groove; 43 Smooth layer; 5 Cylinder; 51 Cylinder rod; 6 Ejector plate; 61 Diagonal brace plate; 62 Horizontal brace plate; 7 Ejector rod; 71 Fixed rib; 8 Slide plate; 81 Ball groove; 82 Ejector ball. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figures 1-6 A high-precision automotive headlight forming mold includes a fixed mold 1, a movable mold 2 above the fixed mold 1, a cavity 11 and a hot runner 12 on the fixed mold 1, an ejector hole 10 on the fixed mold 1, a lower sliding sleeve 101 inside the ejector hole 10, a mold base 4 and a guide rod 13 on the fixed mold 1, a sealing inner frame 20 and a casting pipe 21 on the movable mold 2, a guide hole 3 and a core 22 on the movable mold 2, an upper sliding sleeve 31 inside the guide hole 3, a guide groove 42 and a mounting hole 41 on the mold base 4, a cylinder 5 on the mold base 4, a cylinder rod 51 on the cylinder 5, an ejector plate 6 on the cylinder rod 51, an ejector rod 7 on the ejector plate 6, and a sliding plate 8 slidably connected inside the guide groove 42. The slide plate 8 is equipped with a diagonal brace 61 and a horizontal brace 62, and the top rod 7 is equipped with a reinforcing rib 71. A smooth layer 43 is provided on the guide groove 42, and a ball groove 81 is provided on the slide plate 8, with a top ball 82 provided in the ball groove 81.

[0022] It should be further noted that the guide rod 13 and the guide hole 3 are a group, and there are a total of four groups symmetrically arranged. The guide hole 3 is pressed and sealed to the guide rod 13 through the upper tight sliding sleeve 31. Both the lower tight sliding sleeve 101 and the upper tight sliding sleeve 31 are made of NBR nitrile rubber, which has elastic sealing properties, is waterproof, corrosion resistant, wear resistant and durable.

[0023] It should be further explained that the sealing inner frame 20 is a frame-shaped structure and is set on the inner wall of the moving mold 2. The ejector hole 10 and the lower sealing sleeve 101 are a group, and there are a total of four groups symmetrically arranged. The ejector hole 10 is pressed and sealed to the ejector rod 7 through the lower sealing sleeve 101. The sealing inner frame 20 is made of polyurethane high-elastic rubber, which has elastic sealing and is durable.

[0024] It should be further explained that the mold base 4 has an inverted "∏" shape structure. The slide plate 8 and the guide groove 42 are a set, and there are two sets in total that are symmetrically arranged. The angle between the inclined support plate 61 and the horizontal plane is 60 degrees. The inclined support plate 61 and the horizontal support plate 62 form a triangular support structure, which is stable and ensures the stability of the ejector.

[0025] It should be further explained that the rib 71 is a triangular structure and is welded between the top plate 6 and the top rod 7. There are four ribs 71 arranged in a circle. The ribs 71 are made of hard alloy steel, which has high strength and does not deform. The triangular structure has strong stability, which improves the structural stability between the top plate 6 and the top rod 7.

[0026] It should be further noted that the ball groove 81 and the top ball 82 are a set, and there are two sets in total, which are symmetrically arranged. Each set has six balls arranged vertically. The top ball 82 is made of high-speed steel, which is strong and durable.

[0027] Two-thirds of the top ball 82 is rolled and engaged in the ball groove 81 to ensure the rolling effect of the top ball 82 and prevent it from slipping out of the ball groove 81.

[0028] It should be further noted that the smooth layer 43 is uniformly coated along the inner wall of the guide groove 42. The smooth layer 43 is a PTFE polytetrafluoroethylene coating with a thickness of 100 to 120 micrometers. The PTFE polytetrafluoroethylene coating has excellent low friction and is scratch-resistant and durable.

[0029] Working method: The moving mold 2 moves downward and closes with the fixed mold 1. Then, molten plastic particles are injected into each cavity 11 through the gating pipe 21 and the hot runner 12. Combined with each core 22, injection molding is achieved. The mold is then opened later, and finally the ejector pin 7 is used for ejection (this is the existing technology). When the moving mold 2 moves downward and closes with the fixed mold 1, the moving mold 2 completely seals the outer wall of the fixed mold 1 through the sealing inner frame 20. At the same time, the guide rod 13 also achieves a sliding sealing effect between the upper sliding sleeve 31 and the guide hole 3. Moreover, the ejector rod 7 itself also achieves a sliding sealing effect between the lower sliding sleeve 101 and the ejector hole 10. Overall, this improves the precision of preventing air intrusion during the injection molding process.

[0030] Furthermore, after injection molding, the moving mold 2 moves upward to achieve the mold opening process (as per existing technology). After the moving mold 2 moves upward to open the mold and resets, the cylinder 5 can be activated. The cylinder rod 51 extends upward and drives the inclined support plate 61 and the horizontal support plate 62 to move upward simultaneously through the ejector plate 6. At the same time, the slide plate 8 will slide upward along the guide groove 42, and the four ejector rods 7 can slide upward along the lower dense sliding sleeve 101 to stably eject the finished products from the four cavities 11. Due to the stable support of the horizontal support plate 62 and the inclined support plate 61 for the ejector plate 6, and the fixed ribs 71 provided, the structural stability between the ejector rods 7 and the ejector plate 6 is improved. The overall upward movement of the ejector plate 6 and the ejector rods 7 is stably guided, avoiding wobbling. Overall, the stability and precision of the molded products in the cavity 11 of the fixed mold 1 are greatly improved by the molding mold for the round headlight housing.

[0031] In addition, during the upward ejection process, the slide plate 8 will slide smoothly upward through the smooth layer 43 and the guide groove 42. At the same time, each top ball 82 will also roll along the inner wall of the guide groove 42, realizing the smooth rolling connection of the slide plate 8 between the guide grooves 42, thereby improving the smoothness of ejection of the four round headlight housings after injection molding. The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-precision automotive headlight molding die, comprising a fixed mold (1), characterized in that: A movable mold (2) is provided above the fixed mold (1). The fixed mold (1) has a cavity (11) and a hot runner (12). The fixed mold (1) has an ejector hole (10). A lower sliding sleeve (101) is provided inside the ejector hole (10). The fixed mold (1) has a mold base (4) and a guide rod (13). The movable mold (2) has a sealing inner frame (20) and a casting pipe (21). The movable mold (2) has a guide rod. Hole (3) and core (22), the guide hole (3) is provided with upper tight sliding sleeve (31), the mold base (4) is provided with guide groove (42) and mounting hole (41), the mold base (4) is provided with cylinder (5), the cylinder (5) is provided with cylinder rod (51), the cylinder rod (51) is provided with top plate (6), the top plate (6) is provided with top rod (7), and the guide groove (42) is slidably connected with slide plate (8); The sliding plate (8) is provided with a diagonal brace (61) and a horizontal brace (62), and the top rod (7) is provided with a reinforcing rib (71). The guide groove (42) is provided with a smooth layer (43), and the slide plate (8) is provided with a ball groove (81), and a top ball (82) is provided in the ball groove (81).

2. The high-precision automotive lamp forming mold according to claim 1, characterized in that: The guide rod (13) and the guide hole (3) are a set, and there are four sets in total that are symmetrically arranged. The guide hole (3) is pressed and sealed to the guide rod (13) through the upper tight sliding sleeve (31).

3. The high-precision automotive lamp forming mold according to claim 1, characterized in that: The sealing inner frame (20) is a frame-shaped structure and is set on the inner wall of the moving mold (2). The top material hole (10) and the lower sealing sleeve (101) are a set, and there are four sets in total that are symmetrically arranged. The top material hole (10) is pressed and sealed by the bottom sealing sleeve (101) and the top rod (7).

4. The high-precision automotive lamp forming mold according to claim 1, characterized in that: The mold base (4) is an inverted "∏" shaped structure. The slide plate (8) and the guide groove (42) are a set, and there are two sets symmetrically arranged. The angle between the inclined support plate (61) and the horizontal plane is sixty degrees.

5. The high-precision automotive lamp forming mold according to claim 1, characterized in that: The ribs (71) are triangular in shape and are located between the top plate (6) and the top rod (7). There are four ribs (71) arranged in a circle.

6. The high-precision automotive lamp forming mold according to claim 1, characterized in that: The ball groove (81) and the top ball (82) are a set, and there are two sets symmetrically arranged. Each set consists of six balls arranged vertically. Two-thirds of the top ball (82) is rolled and engaged in the ball groove (81).

7. The high-precision automotive lamp forming mold according to claim 1, characterized in that: The smooth layer (43) is uniformly coated along the inner wall of the guide groove (42) and has a thickness of one hundred to one hundred and twenty micrometers.

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