Injection mold for sound insulation material of automobile body

Abstract

The utility model relates to an injection mold for an automobile body sound insulation material and belongs to the field of injection molding production of the automobile body sound insulation material. The positioning ring is connected with the fixed mold fixing plate, the flange type sprue bush is connected with the fixed mold fixing plate, and the pull rod screw penetrates through the water gap plate and is connected with the limiting pull rod, so that the water gap plate is connected with the fixed mold fixing plate; the fixed mold guide pillar penetrates through the fixed mold fixing plate, the stripper plate and the fixed mold plate, the fixed mold guide pillar is in interference fit with the fixed mold fixing plate, the fixed mold guide pillar is in clearance fit with the stripper plate and the fixed mold plate, and the fixed mold plate slides on the fixed mold guide pillar; the fixed mold core is fixed in the fixed mold plate, the nylon rubber plug is fixed on the movable mold plate and matched with the fixed mold plate, the nylon rubber plug is in interference fit with the fixed mold plate, and the movable mold core is fixed in the movable mold plate. The injection mold has the advantages that the material loss on the cold runner is reduced, the material cost of a product is reduced, the profit of the product is improved, the injection molding pressure and the injection molding filling time are indirectly reduced, the production rhythm is improved, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the field of injection molding production of automobile body sound insulation materials, in particular to an injection molding mold for automobile body sound insulation materials. Background Art

[0002] At present, in the injection molding production process of automotive rubber sound insulation materials (EVA resin mixture, code: DFOAM), the cold runner generated by the injection molding of the point gate mold generates a lot of waste. Customers require that the secondary backfill utilization of the waste generated by the cold runner of the product should not exceed 30% of the weight of the product. Some small-sized products cannot meet this standard because the traditional gate sleeve has to pass through the fixed mold fixed plate (3) for a long time. The materials in the gate sleeve are all waste in the production process. These wastes increase the material cost of the product. Under the current situation of rising raw material prices, the traditional gate sleeve cannot be shortened due to structural reasons, which directly affects the already meager profits of the product. It is urgent to improve. Summary of the invention

[0003] The purpose of the utility model is to provide an injection mold for automobile body sound insulation material, which solves the problems of high product material cost and large material loss in existing injection molds. The utility model can reduce the material loss in the cold runner during the injection molding of automobile body sound insulation material, reduce the material cost of the product, and indirectly reduce the injection pressure and injection filling time.

[0004] The above-mentioned purpose of the utility model is achieved through the following technical solutions:

[0005] Injection mold for automobile body sound insulation material, the positioning ring 1 is connected to the fixed mold fixing plate 3, and the positioning ring 1 is located in the center of the fixed mold fixing plate 3; the flange type gate sleeve 4 is connected to the fixed mold fixing plate 3, and the pull rod screw 2 passes through the sprue plate 5 and is connected to the limit pull rod 7, so that the sprue plate 5 and the fixed mold fixing plate 3 are connected; the fixed mold guide column 14 passes through the fixed mold fixing plate 3, the sprue plate 5 and the fixed mold plate 6, and the fixed mold guide column 14 and the fixed mold fixing plate 3 adopt interference fit (tolerance is H7 / n6), and the fixed mold guide column 14 and the sprue plate 5 and the fixed mold plate 6 adopt clearance fit (tolerance is H8 / h7), and the fixed mold plate 6 It slides on the fixed mold guide column 14 and limits the sliding stroke of the fixed mold plate 6 through the limit pull rod 7; the fixed mold core 16 is fixed in the fixed mold plate 6, the nylon plug 17 is fixed on the movable mold plate 8 and cooperates with the fixed mold plate 6, the nylon plug 17 and the fixed mold plate 6 adopt an interference fit (tolerance is H7 / n5), and the movable mold core 18 is fixed in the movable mold plate 8; the push plate guide column 10 is connected to the push plate panel 11, the push plate panel 11 is fixed on the push plate bottom plate 12, and slides between the movable mold plate 8 and the movable mold fixed plate 13, and the fixing screws 20 pass through the movable mold fixed plate 13 and the square iron 9 and are fixed to the movable mold plate 8.

[0006] The flange type gate sleeve 4 is installed on the inner side of the fixed mold plate (i.e., one side of the sprue plate 5). The traditional gate sleeve needs to be installed on the outer side of the fixed mold plate 3 (i.e., installed on the side of the positioning ring 1) and then pass through the sprue plate 5. It is longer than the flange type gate sleeve by the thickness of the entire fixed mold plate 3, while the thickness of the flange type gate sleeve 4 is consistent with the thickness of the sprue plate 5.

[0007] The cold runner 15 is located in the gap between the nozzle plate 5 and the fixed mold plate 6, and its length is shortened by more than half compared with the traditional gate sleeve.

[0008] The beneficial effects of the utility model are: novel conception, simple structure, compared with the traditional injection mold, the gate sleeve of the utility model is shorter in height direction, which reduces the material loss in the cold runner during the injection molding of the automobile body sound insulation material, reduces the material cost of the product, increases the product profit, indirectly reduces the injection pressure and injection filling time, improves the production rhythm, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present application. The illustrative examples of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 This is a schematic diagram of the installation of the flange gate sleeve of the utility model;

[0012] Figure 3 This is a schematic diagram of the structure of the flange gate sleeve of the utility model;

[0013] Figure 4 This is a schematic diagram of the cold runner structure of the utility model.

[0014] In the figure: 1. positioning ring; 2. tie rod screw; 3. fixed mold fixing plate; 4. flange type gate sleeve; 5. sprue plate; 6. fixed mold plate; 7. limit tie rod; 8. movable mold plate; 9. square iron; 10. push plate guide pin; 11. push plate panel; 12. push plate bottom plate; 13. movable mold fixing plate; 14. fixed mold guide pin; 15. cold runner; 16. fixed mold core; 17. nylon rubber plug; 18. movable mold core; 19. finished product; 20. fixing screws. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0016] See also Figures 1 to 4 As shown, the automobile body sound insulation material injection mold of the utility model includes a positioning ring 1, a pull rod screw 2, a fixed mold fixing plate 3, a flange type gate sleeve 4, a sprue plate 5, a fixed mold plate 6, a limit pull rod 7, a movable mold plate 8, a square iron 9, a push plate guide column 10, a push plate panel 11, a push plate bottom plate 12, a movable mold fixing plate 13, a fixed mold guide column 14, a cold runner 15, a fixed mold core 16, a nylon plug 17, a movable mold core 18, a product 19, and a fixing screw 20. The positioning ring 1 is connected to the fixed mold fixing plate 3, and its position is in the center of the fixed mold fixing plate 3; the flange type gate sleeve 4 is connected to the fixed mold fixing plate 3, the tie rod screw 2 passes through the nozzle plate 5 and is connected to the limit pull rod 7, so that the nozzle plate 5 and the fixed mold fixing plate 3 are connected, the fixed mold guide column 14 passes through the fixed mold fixing plate 3, the nozzle plate 5 and the fixed mold plate 6, the fixed mold guide column 14 and the fixed mold fixing plate 3 adopt interference fit (tolerance is H7 / n6), the fixed mold guide column 14 and the nozzle plate 5, the fixed mold plate 6 adopt clearance fit (tolerance is H8 / h7), the fixed mold plate 6 is in the fixed mold guide column 14 Slide up, limit the sliding stroke of the fixed template 6 by the limit pull rod 7, the fixed template core 16 is fixed in the fixed template 6, the nylon plug 17 is fixed on the movable template 8 and cooperates with the fixed template 6, the nylon plug 17 and the fixed template 6 adopt interference fit (tolerance is H7 / n5), and the movable template core 18 is fixed in the movable template 8; the push plate guide column 10 is connected to the push plate panel 11, the push plate panel 11 is fixed on the push plate bottom plate 12, and slides between the movable template 8 and the movable mold fixed plate 13, and the fixing screws 20 pass through the movable mold fixed plate 13 and the square iron 9 and are fixed to the movable template 8.

[0017] The thickness of the flange type sprue sleeve 4 is consistent with the thickness of the nozzle plate 5. Compared with the traditional three-plate mold sprue sleeve, it is shortened by more than half, thereby reducing the amount of cold material in the sprue sleeve.

[0018] The cold runner 15 is located in the gap between the nozzle plate 5 and the fixed mold plate 6, and is installed on the inner side of the fixed mold plate (i.e., one side of the nozzle plate 5). The gate sleeve of the traditional mold needs to be installed on the outer side of the fixed mold plate 3 (i.e., installed on the side of the positioning ring 1), which is longer than the flange-type gate sleeve by the thickness of the entire fixed mold plate 3.

[0019] See also Figures 1 to 4As shown, when the automobile body sound insulation material injection mold of the utility model is used for production, the resin heated into a fluid state enters the mold cavity of the product 19 (i.e., the cavity formed by the fixed mold core 16 and the movable mold core 18) through the flange type gate sleeve 4. After the product is finalized, the movable mold fixing plate 13 is pulled by the mold opening action of the injection molding machine to make the mold open. At this time, the nylon plug 17 fixed on the movable mold plate 8 and the fixed mold plate 6 are interference fit (i.e., tight fit). When the mold is opened, the nylon plug 17 and the fixed mold plate 6 are tightly matched, which will pull the fixed mold plate 6 to move toward the movable mold plate 8. The fixed mold plate 6 slides on the fixed mold guide column 14 until it reaches the stroke limited by the limit rod 7. When the mold opening pulling force exceeds the matching force of the nylon plug 17 and the fixed mold plate 6, the movable and fixed molds will be completely separated. At this time, the cold runner 15 can be taken out from the gap between the sprue plate 5 and the fixed mold plate 6. When a traditional gate sleeve is used in this type of mold, its length will penetrate the sprue plate 5 and the fixed mold plate 3. The thickness of the flange-type gate sleeve of the utility model is only consistent with the thickness of the sprue plate 5, which reduces the consumption of raw materials on the gate sleeve, reduces material costs, and increases product profits.

[0020] The above description is only a preferred example of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made to the present invention shall be included in the protection scope of the present invention.

Claims

1. An injection mold for automobile body sound insulation material, characterized by: The positioning ring (1) is connected to the fixed mold fixing plate (3), and the positioning ring (1) is located at the center of the fixed mold fixing plate (3); the flange type gate sleeve (4) is connected to the fixed mold fixing plate (3), and the tie rod screw (2) passes through the nozzle plate (5) and is connected to the limit pull rod (7), so that the nozzle plate (5) and the fixed mold fixing plate (3) are connected; the fixed mold guide column (14) passes through the fixed mold fixing plate (3), the nozzle plate (5) and the fixed mold plate (6), the fixed mold guide column (14) and the fixed mold fixing plate (3) are interference fit, and the fixed mold guide column (14) and the nozzle plate (5) and the fixed mold plate (6) are clearance fit, and the fixed mold plate (6) slides on the fixed mold guide column (14), and the fixed mold plate (6) is connected to the fixed mold guide column (14). The over-limit pull rod (7) limits the sliding stroke of the fixed mold plate (6); the fixed mold core (16) is fixed in the fixed mold plate (6), the nylon rubber plug (17) is fixed on the movable mold plate (8) and cooperates with the fixed mold plate (6), the nylon rubber plug (17) and the fixed mold plate (6) are interference fit, and the movable mold core (18) is fixed in the movable mold plate (8); the push plate guide column (10) is connected to the push plate panel (11), the push plate panel (11) is fixed on the push plate bottom plate (12), and slides between the movable mold plate (8) and the movable mold fixed plate (13), and the fixing screw (20) passes through the movable mold fixed plate (13) and the square iron (9) and is fixed on the movable mold plate (8).

2. The automobile body sound insulation material injection mold according to claim 1, characterized in that: The thickness of the flange type sprue sleeve (4) is consistent with the thickness of the sprue plate (5).

3. The automobile body sound insulation material injection mold according to claim 1, characterized in that: The cold runner (15) is located in the gap between the nozzle plate (5) and the fixed mold plate (6) and is installed on the inner side of the fixed mold fixing plate.

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