An injection mold for automobile lamp holder

Abstract

The utility model provides an injection mold for an automobile lamp holder, belonging to the technical field of plastic parts molding. The injection mold for the automobile lamp holder includes an auxiliary demoulding structure, the auxiliary demoulding structure includes an auxiliary unloading cylinder, an inclined sliding hole opened in the lower mold plate, and a movable ejector rod inserted in the sliding hole and sliding freely, the upper end of the movable ejector rod has a fitting portion against the automobile lamp holder, a guide slider is embedded in the first ejector plate, a slide groove is provided in the guide slider, the lower end of the movable ejector rod slides with the slide groove, the auxiliary unloading cylinder is hinged on the movable ejector rod, the upper end of the telescopic rod of the auxiliary unloading cylinder is fixed with a molding core inserted into a connecting sleeve, an arc groove for inserting the molding core is opened on the side of the fitting portion, and the inner wall of the arc groove has an inverted triangle molding groove that is embedded with the inverted triangle portion. With the auxiliary demoulding structure, the inverted triangle portion with a smaller structure can be horizontally displaced and withdrawn, and the inverted triangle portion is prevented from being squeezed in the longitudinal direction to destroy the product structure itself during demoulding.

Description

Technical Field

[0001] The utility model belongs to the technical field of plastic part molding and relates to an injection mold for an automobile lamp holder. Background Art

[0002] The lamp holder of the car headlight is used to install various lamp groups, such as low beam, high beam, turn signal, width lamp, daytime running lamp, fog lamp, so the structural design of the lamp holder belongs to a large and complex product, especially the structural design of the headlight holder. Because there are many lamp groups installed, on the one hand, it is limited by the shape of the lampshade shell, and on the other hand, it is limited by the space of the engine compartment. The structural features of the headlight holder products are mostly special-shaped structural features, which are difficult to injection mold and have complex molds. In particular, the demoulding structure of the special-shaped features on the product cannot be completed by a single linear ejection action, so it is necessary to design an injection mold with multi-directional ejection to complete the demoulding. Utility Model Content

[0003] The utility model aims to solve the above problems in the prior art and proposes an injection mold for an automobile lamp holder, which has an auxiliary demoulding structure and an active ejector rod arranged obliquely, so that a smaller inverted triangle part can be ejected horizontally and horizontally, and the inverted triangle part can be squeezed in the longitudinal direction to avoid damaging the product structure itself during demoulding.

[0004] The purpose of the utility model can be achieved by the following technical solutions: an injection mold for an automobile lamp holder, comprising an upper top plate, an upper mold plate, a lower mold plate, a lower bottom plate, a first ejector plate and a second ejector plate, the middle of the automobile lamp holder has a protruding connecting sleeve, and both sides of the connecting sleeve have protruding inverted triangles, characterized in that the upper mold plate is fixed to the lower mold plate by bolts, a vertical plate is fixed on the lower bottom plate, the upper end of the vertical plate is connected to the lower mold plate, and a discharge rod is also fixed on the lower bottom plate, and the discharge rod passes through the lower mold plate and contacts the mold cavity;

[0005] The auxiliary demoulding structure also includes an auxiliary demoulding structure, which includes an auxiliary unloading cylinder, an inclined sliding hole in the lower mold plate, and a movable ejecting rod that is inserted into the sliding hole and slides freely. The upper end of the movable ejecting rod has a fitting portion that abuts against the automobile lamp holder. A guide sliding block is embedded in the first ejecting plate, and a sliding groove is provided in the guide sliding block. The lower end of the movable ejecting rod slides in cooperation with the sliding groove. The auxiliary unloading cylinder is hinged to the movable ejecting rod, and a molding core inserted into a connecting sleeve is fixed to the upper end of the telescopic rod of the auxiliary unloading cylinder. An arc groove for inserting the molding core is provided on the side of the fitting portion, and the inner wall of the arc groove has an inverted triangle molding groove that is engaged with the inverted triangle portion.

[0006] Furthermore, the upper end surface of the fitting portion has a step, which fits with the convex edge of the surface of the automobile lamp holder, and when the movable ejector rod tilts upward, the step moves horizontally and moves away from the convex edge of the surface of the automobile lamp holder.

[0007] Furthermore, a square hole is formed on the movable ejector rod, the auxiliary unloading cylinder is located in the square hole, and the bottom of the auxiliary unloading cylinder is hinged to the bottom wall of the square hole. The square hole is used to leave a certain swing space for the auxiliary unloading cylinder.

[0008] Furthermore, a guide slide column is fixed on the lower bottom plate, and guide slide holes for the guide slide column to pass through are opened on the first ejection plate and the second ejection plate.

[0009] Furthermore, an injection molding connection port is opened on the upper top plate, an injection molding needle tube is embedded in the upper template, the upper end of the injection molding needle tube is connected to the injection molding connection port, and the lower end of the injection molding needle tube is connected to the mold cavity in the upper template.

[0010] Furthermore, the upper end surface of the forming core has a plurality of convex blocks distributed in a matrix.

[0011] The plastic delivery pipe is connected to the injection molding connection port. The injection molding machine is started to drive the upper mold plate and the lower mold plate to close the mold. The molten plastic enters the mold cavity through the injection molding needle tube. The mold is opened after the product is cooled and shaped. The unloading cylinder pushes the second ejector plate and the first ejector plate up, so that the unloading rod moves up. At the same time, the movable ejector rod also moves up, so that the entire product is separated from the lower mold plate. During the upward movement of the movable ejector rod, the fitting part at the upper end moves horizontally relative to the product, so that the inverted triangle molding groove is separated from the inverted triangle part. Finally, the telescopic rod of the auxiliary unloading cylinder is driven down, driving the molding core to be pulled out from the connecting sleeve. At this time, the product can be taken out.

[0012] Compared with the prior art, the injection mold of the automobile lamp holder has the following advantages:

[0013] 1. It has an auxiliary demoulding structure and an active ejector rod is tilted to allow the smaller inverted triangle to be moved out horizontally, thus avoiding longitudinal squeezing of the inverted triangle to damage the product structure.

[0014] 2. The molding core structure is small and has its own auxiliary unloading cylinder, which can demould irregular small holes and slots. Since the auxiliary unloading cylinder can swing, it can realize automatic adjustment of the demoulding direction and is suitable for holes and slots with different inclination angles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a cross-sectional view of the injection mold of the automobile lamp holder.

[0016] Figure 2 It is a three-dimensional diagram of the injection mold of the automobile lamp holder.

[0017] Figure 3 It is a schematic diagram of the internal structure of the lower template.

[0018] Figure 4 It is a structural diagram of an automobile lamp holder product.

[0019] Figure 5 It is a cross-sectional view of the auxiliary demoulding structure.

[0020] Figure 6 It is a three-dimensional diagram of the auxiliary demoulding structure.

[0021] Figure 7 It is a structural schematic diagram of a movable ejector rod.

[0022] In the figure, 1, upper top plate; 2, upper template; 3, lower template; 4, lower bottom plate; 5, first top plate; 6, second top plate; 7, automobile lamp holder; 71, connecting sleeve; 72, inverted triangle portion; 8, vertical plate; 9, discharge rod; 10, auxiliary discharge cylinder; 11, movable top rod; 111, fitting portion; 112, arc groove; 113, inverted triangle molding groove; 114, step; 115, square hole; 12, guide slide block; 13, molding core; 131, convex square block; 14, guide slide column; 15, guide slide hole; 16, injection molding connection port; 17, injection molding needle tube. DETAILED DESCRIPTION

[0023] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0024] like Figure 1-4 As shown, the injection mold of the automobile lamp holder 7 includes an upper top plate 1, an upper mold plate 2, a lower mold plate 3, a lower bottom plate 4, a first ejector plate 5 and a second ejector plate 6. The middle part of the automobile lamp holder 7 has a protruding connecting sleeve 71, and both sides of the connecting sleeve 71 have protruding inverted triangle portions 72. The upper mold plate 2 and the lower mold plate 3 are fixed by bolts. A vertical plate 8 is fixed on the lower bottom plate 4, and the upper end of the vertical plate 8 is connected to the lower mold plate 3. A discharge rod 9 is also fixed on the lower bottom plate 4, and the discharge rod 9 passes through the lower mold plate 3 and contacts with the mold cavity.

[0025] like Figure 5-7 As shown, the injection mold of the automobile lamp holder 7 also includes an auxiliary demoulding structure, which includes an auxiliary unloading cylinder 10, an inclined sliding hole opened in the lower mold plate 3, and a movable ejector rod 11 that is inserted into the sliding hole and slides freely. The upper end of the movable ejector rod 11 has a fitting portion 111 that abuts against the automobile lamp holder 7. A guide slider 12 is embedded in the first ejector plate 5, and a sliding groove is provided in the guide slider 12. The lower end of the movable ejector rod 11 slides in cooperation with the sliding groove. The auxiliary unloading cylinder 10 is hinged on the movable ejector rod 11, and a molding core 13 inserted into the connecting sleeve 71 is fixed to the upper end of the telescopic rod of the auxiliary unloading cylinder 10. The upper end surface of the molding core 13 has a plurality of convex blocks 131 distributed in a matrix.

[0026] The side of the fitting portion 111 is provided with an arc groove 112 for inserting the forming core 13, and the inner wall of the arc groove 112 is provided with an inverted triangle forming groove 113 which is engaged with the inverted triangle portion 72. The upper end surface of the fitting portion 111 is provided with a step 114, and the step 114 is in contact with the convex edge of the surface of the automobile lamp holder 7. When the movable ejector rod 11 is tilted upward, the step 114 moves horizontally and away from the convex edge of the surface of the automobile lamp holder 7.

[0027] The movable ejector rod 11 is provided with a square hole 115, the auxiliary unloading cylinder 10 is located in the square hole 115, and the bottom of the auxiliary unloading cylinder 10 is hinged to the bottom wall of the square hole 115. The square hole 115 is used to leave a certain swing space for the auxiliary unloading cylinder 10.

[0028] A guide slide post 14 is fixed on the lower base plate 4 , and a guide slide hole 15 for the guide slide post 14 to pass through is formed on the first ejection plate 5 and the second ejection plate 6 .

[0029] An injection molding connection port 16 is opened on the upper top plate 1 , and an injection molding needle tube 17 is embedded in the upper template 2 . The upper end of the injection molding needle tube 17 is connected to the injection molding connection port 16 , and the lower end of the injection molding needle tube 17 is connected to the mold cavity in the upper template 2 .

[0030] The plastic delivery pipe is connected to the injection molding connection port 16, and the injection molding machine is started to drive the upper mold plate 2 and the lower mold plate 3 to close the mold. The molten plastic enters the mold cavity through the injection molding needle tube 17. After the product is cooled and shaped, the mold is opened. The unloading cylinder pushes the second ejector plate 6 and the first ejector plate 5 to move upward, so that the unloading rod 9 moves upward, and the movable ejector rod 11 also moves upward at the same time, so that the entire product is separated from the lower mold plate 3. During the upward movement of the movable ejector rod 11, the fitting portion 111 at the upper end is laterally translated relative to the product, so that the inverted triangle molding groove 113 is separated from the inverted triangle portion 72, and finally the telescopic rod of the auxiliary unloading cylinder 10 is driven to descend, driving the molding core 13 to be pulled out from the connecting sleeve 71, and the product can be taken out at this time.

[0031] The specific embodiments described herein are merely examples of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific embodiments described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. An injection mold for an automobile lamp holder, comprising an upper top plate, an upper mold plate, a lower mold plate, a lower bottom plate, a first ejector plate and a second ejector plate, wherein the middle of the automobile lamp holder has a protruding connecting sleeve, and both sides of the connecting sleeve have protruding inverted triangle portions, characterized in that: The upper mold plate is fixed to the lower mold plate by bolts, a vertical plate is fixed to the lower bottom plate, the upper end of the vertical plate is connected to the lower mold plate, and a discharge rod is also fixed to the lower bottom plate, which passes through the lower mold plate and contacts the mold cavity; The auxiliary demoulding structure also includes an auxiliary demoulding structure, which includes an auxiliary unloading cylinder, an inclined sliding hole in the lower mold plate, and a movable ejecting rod that is inserted into the sliding hole and slides freely. The upper end of the movable ejecting rod has a fitting portion that abuts against the automobile lamp holder. A guide sliding block is embedded in the first ejecting plate, and a sliding groove is provided in the guide sliding block. The lower end of the movable ejecting rod slides in cooperation with the sliding groove. The auxiliary unloading cylinder is hinged to the movable ejecting rod, and a molding core inserted into a connecting sleeve is fixed to the upper end of the telescopic rod of the auxiliary unloading cylinder. An arc groove for inserting the molding core is provided on the side of the fitting portion, and the inner wall of the arc groove has an inverted triangle molding groove that is engaged with the inverted triangle portion.

2. The injection mold of the automobile lamp holder according to claim 1, characterized in that: The upper end surface of the fitting portion has a step.

3. The injection mold of the automobile lamp holder according to claim 1, characterized in that: A square hole is opened on the movable ejecting rod, the auxiliary unloading cylinder is located in the square hole, and the bottom of the auxiliary unloading cylinder is hinged to the bottom wall of the square hole.

4. The injection mold of the automobile lamp holder according to claim 1, characterized in that: A guide slide column is fixed on the lower bottom plate, and guide slide holes for the guide slide column to pass through are provided on the first ejecting plate and the second ejecting plate.

5. The injection mold of the automobile lamp holder according to claim 1, characterized in that: An injection molding connection port is opened on the upper top plate, an injection molding needle tube is embedded in the upper template, the upper end of the injection molding needle tube is connected with the injection molding connection port, and the lower end of the injection molding needle tube is connected with the mold cavity in the upper template.

6. The injection mold of the automobile lamp holder according to claim 1, characterized in that: The upper end surface of the molding core is provided with a plurality of convex blocks distributed in a matrix.

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