Plastic coating device for fixing clamp spring of automobile safety air bag

Abstract

The utility model relates to the technical field of automobile safety airbag fixing clamp spring plastic coating, in particular to an automobile safety airbag fixing clamp spring plastic coating device which comprises an upper plastic coating mold and a lower plastic coating mold which are matched with each other, an equipment positioning groove plate is fixedly installed at the bottom of the lower plastic coating mold, and an electric push rod is fixedly installed on the equipment positioning groove plate. A lower clamp spring positioning assembly is fixedly mounted at the output end of the electric push rod, a top positioning frame is fixedly mounted at the top of the plastic coating upper mold, an upper adjusting screw rod is spirally mounted on the top positioning frame, and an upper clamp spring positioning assembly is fixedly mounted at the bottom of the upper adjusting screw rod; three arc-shaped positioning blocks of the upper clamp spring positioning assembly and the lower clamp spring positioning assembly are distributed in a triangular shape, multi-point positioning is achieved in the circumferential direction of the clamp spring, the arc-shaped positioning blocks are matched with the clamp spring, displacement of the clamp spring in the horizontal direction and the vertical direction is effectively limited, and the problem that the thickness of a plastic coating layer is uneven due to positioning deviation of a traditional device is solved; and the plastic coating forming quality of the fixing clamp spring of the automobile safety air bag is improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic coating technology for fixing springs of automobile airbags, and in particular to a plastic coating device for fixing springs of automobile airbags. Background Technology

[0002] As a core component of the automotive passive safety system, the reliability of the airbag's fixation directly affects its normal deployment and protective effect during a collision. Among them, the retaining spring is a key component connecting the airbag to the vehicle body structure. To prevent the retaining spring from rusting or becoming conductive due to exposed metal during long-term use, and to enhance the fit between the retaining spring and the assembled components, it is usually necessary to coat the retaining spring with plastic.

[0003] In the existing technology, most plastic coating devices for retaining springs adopt a simple upper and lower mold closing structure, and achieve plastic coating through the injection groove in the mold. However, such devices have the problem of insufficient positioning accuracy of the retaining spring in the mold. Traditional positioning structures are mostly clamping or supporting in one direction, which is difficult to adapt to the irregular ring or irregular shape of the retaining spring. This causes the retaining spring to easily shift during the injection molding process, resulting in uneven plastic coating thickness and affecting product quality.

[0004] Therefore, it is essential to provide a plastic-coated device for fixing the airbag spring in automobiles to address the shortcomings of existing technologies. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a plastic coating device for fixing springs of automobiles. This device uses three arc-shaped positioning blocks of the upper and lower spring positioning components arranged in a triangle to achieve multi-point positioning from the circumference of the spring. With the arc-shaped positioning blocks fitting the spring, the displacement of the spring in the horizontal and vertical directions is effectively limited. This solves the problem of uneven coating thickness caused by positioning offset in traditional devices and significantly improves the molding quality of plastic coating for fixing springs of automobiles.

[0006] The above-mentioned objectives of this utility model are achieved through the following technical means.

[0007] A plastic-coated device for fixing retaining springs in automobiles is provided, including a plastic-coated upper mold and a plastic-coated lower mold. The upper mold and the lower mold are respectively provided with an upper injection groove and a lower injection groove. An equipment positioning groove plate is fixedly installed at the bottom of the lower mold. An electric push rod is fixedly installed on the equipment positioning groove plate. A lower retaining spring positioning component is fixedly installed at the output end of the electric push rod. A top positioning frame is fixedly installed at the top of the upper mold. An upper adjusting screw is screwed on the top positioning frame. An upper retaining spring positioning component is fixedly installed at the bottom of the upper adjusting screw.

[0008] The upper retaining spring positioning assembly moves through the upper plastic-coated mold and extends into the interior of the upper injection groove, while the lower retaining spring positioning assembly moves through the lower plastic-coated mold and extends into the interior of the lower injection groove. The lower retaining spring positioning assembly and the upper retaining spring positioning assembly movably clamp the retaining spring.

[0009] Specifically, the lower retaining spring positioning assembly includes a lower triangular positioning frame, inside which a lower multi-directional force transmission plate is fixedly installed. The lower multi-directional force transmission plate is fixedly connected to the output end of the electric push rod. Three lower movable columns are fixedly installed above the three corner points of the lower triangular positioning frame. A lower arc-shaped positioning block is fixedly installed on the top of each lower movable column. The lower mold for plastic coating has three lower cylindrical grooves inside, and the lower injection groove has three lower arc-shaped grooves inside. The three lower cylindrical grooves are connected to the three lower arc-shaped grooves. The lower movable columns move through the lower cylindrical grooves, and the lower arc-shaped positioning blocks are movably embedded into the interior of the lower arc-shaped grooves.

[0010] Specifically, the upper retaining spring positioning assembly includes an upper triangular positioning frame, an upper multi-directional force transmission plate fixedly installed inside the upper triangular positioning frame, the bottom of the upper adjusting screw rotatably installed inside the upper multi-directional force transmission plate, three upper movable columns fixedly installed below the three corner points of the upper triangular positioning frame, and an upper arc-shaped positioning block fixedly installed at the bottom of each upper movable column. The upper mold for plastic coating has three upper cylindrical grooves inside, and the upper injection groove has three upper arc-shaped grooves inside. The three upper cylindrical grooves are connected to the three upper arc-shaped grooves. The upper movable columns move through the upper cylindrical grooves, and the upper arc-shaped positioning blocks move into the interior of the upper arc-shaped grooves. The retaining spring is movably clamped between the upper arc-shaped positioning blocks and the lower arc-shaped positioning blocks.

[0011] Specifically, the upper mold of the plastic coating is provided with an injection runner inside. The top of the injection runner extends to the outside of the upper mold of the plastic coating and is fixedly installed with an injection gate. The bottom of the injection runner is connected to the upper injection groove.

[0012] Specifically, an upper locking plate and a lower locking plate are respectively installed on the upper and lower plastic coating molds, and locking screws are spirally installed on the upper and lower locking plates.

[0013] This invention utilizes three arc-shaped positioning blocks arranged in a triangle on the upper and lower retaining spring positioning components to achieve multi-point positioning from the circumference of the retaining spring. Combined with the fit between the arc-shaped positioning blocks and the retaining spring, it effectively restricts the displacement of the retaining spring in the horizontal and vertical directions, solving the problem of uneven plastic coating thickness caused by positioning offset in traditional devices, and significantly improving the molding quality of plastic coating for automotive airbag retaining springs. Attached Figure Description

[0014] The present invention will be further described with reference to the accompanying drawings, but the content of the drawings does not constitute any limitation on the present invention.

[0015] Figure 1 This is a schematic diagram of the main cross-sectional structure of a plastic-coated device for fixing a car airbag retainer spring according to this utility model.

[0016] Figure 2 This is a three-dimensional structural diagram of the installation of the lower retaining spring positioning component, electric push rod, and equipment positioning groove plate of a plastic-coated device for fixing retaining springs of automotive airbags according to this utility model.

[0017] Figure 3 This is a three-dimensional structural diagram of the plastic coating upper mold of a plastic coating device for fixing springs of automobiles according to this utility model.

[0018] Figure 4 This is a top view schematic diagram of the plastic coating lower mold of a plastic coating device for fixing springs of automobiles according to this utility model.

[0019] Figure 5 This is a bottom view schematic diagram of the plastic coating upper mold of a plastic coating device for fixing springs of automobiles according to this utility model.

[0020] from Figures 1 to 5 Including:

[0021] 1. Upper plastic coating mold; 2. Lower plastic coating mold; 3. Upper injection tank; 4. Lower injection tank; 5. Equipment positioning slot plate; 6. Electric push rod; 7. Top positioning frame; 8. Upper adjusting screw; 9. Snap ring; 10. Lower triangular positioning frame; 11. Lower multi-directional force transmission plate; 12. Lower movable column; 13. Lower arc-shaped positioning block; 14. Lower cylindrical groove; 15. Lower arc-shaped groove; 16. Upper triangular positioning frame; 17. Upper multi-directional force transmission plate; 18. Upper movable column; 19. Upper arc-shaped positioning block; 20. Upper cylindrical groove; 21. Upper arc-shaped groove; 22. Injection runner; 23. Injection gate; 24. Upper locking plate; 25. Lower locking plate; 26. Locking screw. Detailed Implementation

[0022] The present invention will be further described in conjunction with the following embodiments.

[0023] Example 1:

[0024] like Figure 1-5 As shown, a plastic-coated device for fixing a car airbag retainer spring includes a plastic-coated upper mold 1 and a plastic-coated lower mold 2. The upper mold 1 and the lower mold 2 are respectively provided with an upper injection groove 3 and a lower injection groove 4. An equipment positioning groove plate 5 is fixedly installed at the bottom of the lower mold 2. An electric push rod 6 is fixedly installed on the equipment positioning groove plate 5. A lower retainer spring positioning component is fixedly installed at the output end of the electric push rod 6. A top positioning frame 7 is fixedly installed at the top of the upper mold 1. An upper adjusting screw 8 is screwed on the top positioning frame 7. An upper retainer spring positioning component is fixedly installed at the bottom of the upper adjusting screw 8.

[0025] The upper retaining spring positioning assembly moves through the upper plastic-coated mold 1 and extends into the interior of the upper injection groove 3, and the lower retaining spring positioning assembly moves through the lower plastic-coated mold 2 and extends into the interior of the lower injection groove 4. The retaining spring 9 is movably clamped between the lower retaining spring positioning assembly and the upper retaining spring positioning assembly.

[0026] This application is used for plastic coating of automotive airbag retaining spring 9. First, the upper plastic coating mold 1 and the lower plastic coating mold 2 cooperate to accommodate and clamp the automotive airbag retaining spring 9. The equipment positioning groove plate 5 plays a role in bottom support and positioning. At the same time, the equipment positioning groove plate 5 and the electric push rod 6 drive the lower retaining spring positioning component to rise and fall, thereby realizing the bottom movable clamping and fixing of the automotive airbag retaining spring 9 and achieving precise position control. The upper adjusting screw 8 rotates and moves on the top positioning frame 7 to drive the upper retaining spring positioning component to rise and fall, thereby making the automotive airbag retaining spring 9 movable clamping and fixing at the top, so that the automotive airbag retaining spring 9 is in the center position of the upper plastic coating mold 1 and the lower plastic coating mold 2, maintaining the uniformity of plastic coating.

[0027] The lower snap ring positioning assembly includes a lower triangular positioning frame 10. A lower multi-directional force transmission plate 11 is fixedly installed inside the lower triangular positioning frame 10. The lower multi-directional force transmission plate 11 is fixedly connected to the output end of the electric push rod 6. Three lower movable columns 12 are fixedly installed above the three corner points of the lower triangular positioning frame 10. A lower arc-shaped positioning block 13 is fixedly installed on the top of each lower movable column 12. Three lower cylindrical grooves 14 are opened inside the plastic-coated lower mold 2. Three lower arc-shaped grooves 15 are opened inside the lower injection groove 4. The three lower cylindrical grooves 14 and the three lower arc-shaped grooves 15 are connected. The lower movable column 12 moves through the lower cylindrical groove 14. The lower arc-shaped positioning block 13 is moved into the interior of the lower arc-shaped groove 15.

[0028] The lower retaining spring positioning assembly drives the lower multi-directional force transmission plate 11 to rise and fall through the output of the electric push rod 6, which in turn drives the lower triangular positioning frame 10 to rise and fall. The lower triangular positioning frame 10 drives the three lower movable columns 12 to rise and fall, so that the lower arc-shaped positioning block 13 moves and rises and falls inside the lower injection molding groove 4. Before injection molding, the lower arc-shaped positioning block 13 is embedded inside the lower arc-shaped groove 15. When it is necessary to clamp and fix the car airbag retaining spring 9, the lower arc-shaped positioning block 13 is raised to reach the specified height, so that when the car airbag retaining spring 9 is placed on the lower arc-shaped positioning block 13, it is at the center height of the cavity formed by the upper injection molding groove 3 and the lower injection molding groove 4.

[0029] The upper snap ring positioning assembly includes an upper triangular positioning frame 16, an upper multi-directional force transmission plate 17 is fixedly installed inside the upper triangular positioning frame 16, the bottom of the upper adjusting screw 8 is rotatably installed inside the upper multi-directional force transmission plate 17, three upper movable columns 18 are fixedly installed below the three corner points of the upper triangular positioning frame 16, and an upper arc-shaped positioning block 19 is fixedly installed at the bottom of each upper movable column 18. The upper plastic coating mold 1 has three upper cylindrical grooves 20 inside, and the upper injection molding groove 3 has three upper arc-shaped grooves 21 inside. The three upper cylindrical grooves 20 and the three upper arc-shaped grooves 21 are connected. The upper movable column 18 moves through the upper cylindrical groove 20, and the upper arc-shaped positioning block 19 moves into the interior of the upper arc-shaped groove 21. The snap ring 9 is movably clamped between the upper arc-shaped positioning block 19 and the lower arc-shaped positioning block 13.

[0030] The upper retaining spring positioning assembly rotates the upper adjusting screw 8, which in turn drives the upper multi-directional force transmission plate 17 to rise and fall, which in turn drives the three upper movable columns 18 to rise and fall, so that the upper arc-shaped positioning block 19 can move inside the upper arc-shaped groove 21 and the upper injection groove 3. When it is necessary to fix the car airbag fixing retaining spring 9, the upper arc-shaped positioning block 19 is lowered, and the lower retaining spring positioning assembly is used to press the car airbag fixing retaining spring 9.

[0031] The upper mold 1 of the plastic coating is provided with an injection runner 22. The top of the injection runner 22 extends to the outside of the upper mold 1 of the plastic coating and is fixedly installed with an injection gate 23. The bottom of the injection runner 22 is connected to the upper injection groove 3.

[0032] This application injects the coating solution through the injection gate 23, which flows through the injection channel 22 into the cavity composed of the upper injection tank 3 and the lower injection tank 4, thereby achieving uniform coating of the exterior of the car airbag fixing spring 9.

[0033] In the actual injection molding process, the car airbag fixing spring 9 is first positioned by the upper and lower spring positioning components before injection molding. After cooling for a period of time, the car airbag fixing spring 9 can remain in place before the injection solution completely solidifies. At this time, the lower arc-shaped positioning block 13 and the upper arc-shaped positioning block 19 are retracted into the lower arc-shaped groove 15 and the upper arc-shaped groove 21, respectively. At the same time, due to the cooling, the external plastic volume decreases, and the injection gate 23 can act as a riser to replenish the injection solution into the cavity, fill the remaining gaps in the cavity, and continue cooling to ensure that the car airbag fixing spring 9 is completely covered with plastic.

[0034] The axial directions of the upper arc-shaped positioning block 19 and the lower arc-shaped positioning block 13 are the same as the axial directions of the corresponding positions of the upper injection molding groove 3 and the lower injection molding groove 4, which can completely adaptably clamp and fix the car airbag fixing spring 9.

[0035] An upper locking plate 24 and a lower locking plate 25 are respectively installed on the upper plastic coating mold 1 and the lower plastic coating mold 2, and locking screws 26 are screwed onto the upper locking plate 24 and the lower locking plate 25.

[0036] The upper plastic coating mold 1 and the lower plastic coating mold 2 are locked together by the locking screw 26 in cooperation with the upper locking plate 24 and the lower locking plate 25, thereby improving the sealing performance.

[0037] This invention utilizes three arc-shaped positioning blocks arranged in a triangle on the upper and lower retaining spring positioning components to achieve multi-point positioning from the circumference of the retaining spring 9. Combined with the fit between the arc-shaped positioning blocks and the retaining spring 9, it effectively restricts the displacement of the retaining spring 9 in the horizontal and vertical directions, solving the problem of uneven plastic coating thickness caused by positioning offset in traditional devices, and significantly improving the molding quality of the plastic coating of the automotive airbag fixing retaining spring 9.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A plastic-coated device for fixing a car airbag retainer spring, characterized in that: The device includes a plastic coating upper mold and a plastic coating lower mold that cooperate with each other. The upper mold and the lower mold are respectively provided with an upper injection groove and a lower injection groove. An equipment positioning groove plate is fixedly installed at the bottom of the lower mold. An electric push rod is fixedly installed on the equipment positioning groove plate. A lower retaining spring positioning assembly is fixedly installed at the output end of the electric push rod. A top positioning frame is fixedly installed at the top of the upper mold. An upper adjusting screw is screwed on the top positioning frame. An upper retaining spring positioning assembly is fixedly installed at the bottom of the upper adjusting screw. The upper retaining spring positioning assembly moves through the upper plastic coating mold and extends into the interior of the upper injection groove, and the lower retaining spring positioning assembly moves through the lower plastic coating mold and extends into the interior of the lower injection groove. The lower retaining spring positioning assembly and the upper retaining spring positioning assembly movably clamp the retaining spring.

2. The plastic-coated device for fixing a car airbag retainer spring according to claim 1, characterized in that: The lower retaining spring positioning assembly includes a lower triangular positioning frame. A lower multi-directional force transmission plate is fixedly installed inside the lower triangular positioning frame. The lower multi-directional force transmission plate is fixedly connected to the output end of the electric push rod. Three lower movable columns are fixedly installed above the three corner points of the lower triangular positioning frame. A lower arc-shaped positioning block is fixedly installed on the top of each lower movable column. The lower plastic coating mold has three lower cylindrical grooves inside, and the lower injection groove has three lower arc-shaped grooves inside. The three lower cylindrical grooves are connected to the three lower arc-shaped grooves. The lower movable columns move through the lower cylindrical grooves, and the lower arc-shaped positioning blocks are movably embedded into the interior of the lower arc-shaped grooves.

3. The plastic-coated device for fixing a car airbag retainer spring according to claim 2, characterized in that: The upper retaining spring positioning assembly includes an upper triangular positioning frame, an upper multi-directional force transmission plate fixedly installed inside the upper triangular positioning frame, and the bottom of the upper adjusting screw rotatably installed inside the upper multi-directional force transmission plate. Three upper movable columns are fixedly installed below the three corner points of the upper triangular positioning frame, and an upper arc-shaped positioning block is fixedly installed at the bottom of each upper movable column. The upper mold for plastic coating has three upper cylindrical grooves inside, and the upper injection groove has three upper arc-shaped grooves inside. The three upper cylindrical grooves are connected to the three upper arc-shaped grooves. The upper movable columns move through the upper cylindrical grooves, and the upper arc-shaped positioning blocks are movably embedded into the interior of the upper arc-shaped grooves. The retaining spring is movably clamped between the upper arc-shaped positioning blocks and the lower arc-shaped positioning blocks.

4. The plastic-coated device for fixing a car airbag retainer spring according to claim 3, characterized in that: The upper mold of the plastic coating is provided with an injection channel inside. The top of the injection channel extends to the outside of the upper mold of the plastic coating and is fixedly installed with an injection gate. The bottom of the injection channel is connected to the upper injection groove.

5. The plastic-coated device for fixing a car airbag retainer spring according to claim 4, characterized in that: An upper locking plate and a lower locking plate are respectively installed on the upper coating mold and the lower coating mold, and locking screws are spirally installed on the upper locking plate and the lower locking plate.

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