A quick-release air bag mold and a quick-release method

Abstract

This invention discloses a rapid demolding airbag mold and a rapid demolding method, comprising an upper mold, a lower mold, and a mold core. The upper and lower molds cooperate to form a mold cavity. The mold core is placed in the mold cavity and connected to a tie rod penetrating the upper mold. The tie rod is a hollow tube, one end of which is connected to the injection molding machine and a high-pressure gas pipeline through a three-way valve, and the other end of which penetrates the mold core and is connected to the mold cavity at the bottom of the mold core. Both the upper and lower molds are double-layer shells forming a sealed interlayer, and heating pipes connected to the sealed interlayer are provided on them. The upper mold includes a first upper mold, a second upper mold, and a third upper mold stacked sequentially upwards. This invention modifies the structure of existing molds, inflates the airbag through the pipes, and achieves automatic demolding of the airbag through its own tension. At the same time, it modifies the heating device and the exhaust structure to achieve rapid heating and exhaust operations, improving product quality and work efficiency.

Description

Technical fields:

[0001] This invention relates to airbag molds, and more particularly to an airbag mold for rapid demolding and a rapid demolding method. Background technology:

[0002] The air bag demolding device is a device that separates the air bags in the mold. It saves manpower and avoids some dangerous situations that may occur during the demolding process, which may adversely affect the personal safety of workers.

[0003] However, existing airbag demolding is usually done manually, which is not only time-consuming and labor-intensive, but also poses certain dangers and threatens the personal safety of workers. Therefore, a demolding device is usually used, but it often needs to be moved before demolding, which is cumbersome. Therefore, a new demolding method is needed to improve work efficiency and reduce the labor intensity of workers. Summary of the Invention:

[0004] The technical problem to be solved by this invention is to overcome the shortcomings of the prior art by modifying the structure of the existing mold, inflating the air bag through a pipe, and achieving automatic demolding of the air bag through its own tension. At the same time, the heating device and exhaust structure are modified to achieve rapid heating and exhaust operations, thereby improving product quality and people's work efficiency. This invention provides an air bag mold and rapid demolding method for rapid demolding.

[0005] The technical solution of the present invention is: a quick-release airbag mold, comprising an upper mold, a lower mold, and a mold core, characterized in that: the upper mold and the lower mold cooperate to form a mold cavity, the mold core is placed in the mold cavity and connected to a pull rod passing through the upper mold, the pull rod is a hollow tube, one end of which is connected to an injection molding machine, and the other end passes through the mold core and communicates with the mold cavity at the bottom of the mold core, an inflation device communicating with the mold cavity is passed through the mold core, the upper mold comprises a first upper mold, a second upper mold, and a third upper mold stacked sequentially upwards, the first upper mold, the second upper mold, the third upper mold, and the lower mold are all double-layer shells forming a sealing interlayer, and a heating pipe communicating with the sealing interlayer inside is provided on them, a conical sealing block is provided between the mold core and the pull rod, the mold core comprises a cylindrical upper mold core and a frustum-shaped lower mold core, the upper mold core is disposed on the upper bottom of the lower mold core, and the pull rod enters from the top of the upper mold core and exits from the bottom of the lower mold core.

[0006] Furthermore, the inflation device includes a high-pressure gas pipeline and a three-way switch valve. The high-pressure gas pipeline is connected to the pull rod through the three-way switch valve. The three-way switch valve is an electric three-way switch valve. A pressure gauge is installed on the high-pressure gas pipeline.

[0007] Furthermore, the inflation device is a high-pressure air pipe parallel to the pull rod. One end of the high-pressure air pipe passes through the mold core and communicates with the mold cavity at the bottom of the mold core. The other end is connected to a high-pressure gas pipeline through a switch. There are two high-pressure air pipes, symmetrically arranged with the pull rod. A pressure gauge is installed on the high-pressure gas pipeline.

[0008] Furthermore, the axes of the first upper mold, the second upper mold, and the third upper mold are coincident. The first upper mold is provided with a fixing plate that is integral with it, and the fixing plate is provided with fixing bolts that extend into the screw holes on the third upper mold.

[0009] Furthermore, the heating pipe includes an inlet pipe and an outlet pipe, and a baffle is provided in the sealing interlayer between the inlet pipe and the outlet pipe.

[0010] Furthermore, the contact surface between the second upper mold and the first and third upper molds is set to a frosted surface.

[0011] Furthermore, the heating pipe is connected to the heating device and circulates with the sealing jacket.

[0012] A rapid demolding method for an airbag mold is provided. The method is as follows: After the airbag is manufactured, a three-way valve is activated to connect the pull rod to a high-pressure gas pipeline. Air is then injected into the airbag fitted on the mold core through the high-pressure gas pipeline. The airbag inflates and expands. Under the action of the expansion force, the opening of the airbag expands and enlarges, causing the airbag to automatically detach from the mold core and fall onto the lower mold.

[0013] Furthermore, during the inflation process of the air bag, the air bag moves downward on the mold core, causing the mold core to press against the opening of the air bag, causing it to expand and enlarge, ultimately allowing the opening of the air bag to detach from the mold core.

[0014] Furthermore, a pressure gauge is installed on the high-pressure gas pipeline.

[0015] The beneficial effects of this invention are:

[0016] 1. This invention modifies the structure of an existing mold, inflates the air bag through a pipe, and achieves automatic demolding of the air bag through its own tension. At the same time, it modifies the heating device and exhaust structure to achieve rapid heating and exhaust operations, thereby improving product quality and people's work efficiency.

[0017] 2. The upper mold of the present invention includes a first upper mold, a second upper mold and a third upper mold. Through the gap between the second upper mold and the first and third upper molds, the air in the mold cavity can be quickly discharged, preventing the accumulation of air from affecting the quality of the product and improving work efficiency.

[0018] 3. In this invention, the first upper mold, the second upper mold, the third upper mold, and the lower mold are transformed from single-layer mold walls to double-layer mold walls. The heating medium is filled in the interlayer formed by the heating pipes, so that the heating medium flows in the interlayer to heat the mold. The heating speed is fast, the heating is uniform, and there is no contact with air, which reduces heat loss and ensures product quality.

[0019] 4. The heating pipe of this invention includes an inlet pipe and an outlet pipe, and a baffle is provided between the inlet pipe and the outlet pipe, so that the heating medium entering the sealed jacket from the inlet pipe flows along the sealed jacket to the outlet pipe and flows out from the outlet pipe, thus completing the continuous heating of the mold.

[0020] 5. The first upper mold of the present invention is provided with a fixing plate that is integral with it, and the fixing plate is provided with fixing bolts. The fixing bolts extend into the screw holes on the third upper mold to complete the fixed connection of the three and facilitate disassembly.

[0021] 6. The high-pressure gas pipeline of this invention is connected to the pull rod through a three-way switch valve to complete the switching operation of injection molding and inflation demolding. A pressure gauge is installed on the high-pressure gas pipeline to monitor the pressure inside the air bag and prevent the air bag from being damaged due to excessively rapid pressure rise.

[0022] 7. The contact surface between the second upper mold and the first and third upper molds of the present invention is set as a frosted surface, and there are gaps between the frosted surfaces. Air in the mold cavity can escape from the gaps between the frosted surfaces, preventing air from being stored in the groove and affecting the quality of the product. Attached image description:

[0023] Figure 1 A schematic diagram of the structure of an airbag mold for rapid demolding.

[0024] Figure 2 This is a schematic diagram of the upper mold and the mold core.

[0025] Figure 3 This is a schematic diagram of the lower mold structure.

[0026] Figure 4 for Figure 1 The longitudinal section diagram.

[0027] Figure 5 This is a longitudinal section view of mold core one.

[0028] Figure 6 This is a schematic diagram of the structure at the connection point of the first upper mold, the second upper mold, and the third upper mold.

[0029] Figure 7 for Figure 4 AA sectional view.

[0030] Figure 8 This is a longitudinal section view of mold core two. Detailed implementation method:

[0031] Example: See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 In the diagram, 1-upper mold, 2-lower mold, 3-mold core, 4-pull rod, 5-fixing plate, 6-fixing bolt, 7-inlet pipe, 8-outlet pipe, 9-blocking partition, 10-sealing interlayer, 11-conical sealing block, 13-high pressure air pipe; 1a-first upper mold, 1b-second upper mold, 1c-third upper mold; 3a-upper mold core, 3b-lower mold core.

[0032] A rapid demolding airbag mold and rapid demolding method are disclosed, comprising an upper mold, a lower mold, and a mold core. The upper and lower molds cooperate to form a mold cavity. The mold core is placed in the mold cavity and connected to a pull rod that penetrates the upper mold. The pull rod is a hollow tube, one end of which is connected to the injection molding machine and a high-pressure gas pipeline through a three-way valve, and the other end of which penetrates the mold core and is connected to the mold cavity at the bottom of the mold core. The upper mold includes a first upper mold, a second upper mold, and a third upper mold stacked sequentially upwards. The first upper mold, the second upper mold, the third upper mold, and the lower mold are all double-layer shells forming a sealing interlayer, and a heating pipe connected to the internal sealing interlayer is provided on them. A conical sealing block is provided between the mold core and the pull rod. This invention modifies the structure of an existing mold, inflates the airbag through the pipe, and achieves automatic demolding of the airbag through its own tension. At the same time, it modifies the heating device and the exhaust structure to achieve rapid heating and exhaust operations, thereby improving product quality and work efficiency.

[0033] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Example 1: The upper mold 1 and the lower mold 2 cooperate to form a mold cavity. The mold core 3 is placed in the mold cavity and connected to the pull rod 4 that passes through the upper mold 1. The pull rod 4 is a hollow tube. One end of the pull rod is connected to the injection molding machine and the high-pressure gas pipeline through a three-way switch valve. The other end passes through the mold core 3 and is connected to the mold cavity at the bottom of the mold core 3. The upper mold 1 includes a first upper mold 1a, a second upper mold 1b and a third upper mold 1c stacked on top of each other in sequence. The first upper mold 1a, the second upper mold 1b, the third upper mold 1c and the lower mold 2 are all double-layer shells that form a sealing interlayer 10. A heating pipe connected to the sealing interlayer 10 inside the mold core 3 is provided on the lower mold core 3. A conical sealing block 11 is provided between the mold core 3 and the pull rod 4.

[0035] The mold core 3 includes an upper mold core 3a in the shape of a cylinder and a lower mold core 3b in the shape of a frustum. The upper mold core 3a is disposed on the upper bottom of the lower mold core 3b. The pull rod 4 enters from the top of the upper mold core 3a and exits from the bottom of the lower mold core 3b.

[0036] The axes of the first upper mold 1a, the second upper mold 1b, and the third upper mold 1c are coincident. The first upper mold 1a is provided with a fixing plate 5, which is an integral structure with it, and the fixing plate 5 is provided with fixing bolts 6, which extend into the screw holes on the third upper mold 1c.

[0037] The heating pipe includes an inlet pipe 7 and an outlet pipe 8, and a baffle plate 9 is provided in the sealing interlayer 10 between the inlet pipe 7 and the outlet pipe 8. The contact surface between the second upper mold 1b and the first upper mold 1a and the third upper mold 1c is set as a frosted surface.

[0038] The heating pipe is connected to the heating device and circulates with the sealing jacket 10. The three-way switch valve is an electric three-way switch valve, and a pressure gauge is installed on the high-pressure gas pipeline.

[0039] Example 2:

[0040] This embodiment is an improvement on the first embodiment. The improvement is in the inflation device, while the other technical features are the same. The difference is that the inflation device is a high-pressure air pipe 13 parallel to the pull rod 4. One end of the high-pressure air pipe 13 passes through the mold core 3 and is connected to the mold cavity at the bottom of the mold core 3. The other end is connected to the high-pressure gas pipeline through a switch. There are two high-pressure air pipes 13, which are symmetrically arranged on the pull rod 4. A pressure gauge is installed on the high-pressure gas pipeline.

[0041] A rapid demolding method for an airbag mold is provided. The method is as follows: After the airbag is manufactured, a three-way switch valve is activated to connect the pull rod 4 to the high-pressure gas pipeline (the high-pressure gas pipeline and the high-pressure air pipe are connected by the switch). The high-pressure gas pipeline inflates the airbag inside the mold core 3. The airbag expands under the action of the expansion force, causing the airbag to automatically detach from the mold core 3 and fall onto the lower mold 2.

[0042] During the inflation process, the air bag moves downwards on the mold core 3, causing the mold core 3 to press against the opening of the air bag, thus expanding it and ultimately detaching the opening of the air bag from the mold core 3. A pressure gauge is installed on the high-pressure gas pipeline.

[0043] In use, the first upper mold 1a, the second upper mold 1b, and the third upper mold 1c are stacked upwards in sequence and then fixed together with fixing bolts 6 to form an upper mold. The upper mold 1 and the lower mold 2 cooperate to form a mold cavity. The mold core 3 is on top of the upper mold 1 under the action of the pull rod 4. The injection molding machine injects plastic into the mold cavity through the pull rod 4. During the injection process, the air in the mold cavity will escape from the gaps between the frosted surfaces, so that the plastic fills the entire mold cavity. After the plastic is formed in the mold cavity, the heating device delivers the heating medium into the sealing jacket 10 through the inlet pipe 7. Due to the obstruction of the baffle 9, the heating medium flows around the mold along the sealing jacket 10 and finally exits from the outlet pipe. 8. Return to the heating device to heat the mold; after the air bag is made, the switch valve is activated to connect the pull rod 4 to the high-pressure gas pipeline. The high-pressure gas pipeline inflates the air bag inside the air bag fitted on the mold core 3. The air bag inflates and expands, moving downwards on the mold core 3 so that the mold core 3 presses against the opening of the air bag, causing it to expand and enlarge. Finally, the opening of the air bag detaches from the mold core 3 and falls onto the lower mold 2. During the inflation process, the pressure inside the air bag is observed using a pressure gauge; finally, the air bag corresponding to the connection with the frosted surface is polished.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A quick-release airbag-mold comprising an upper mold, a lower mold, and a mold core, characterized by: The upper mold and the lower mold cooperate to form a mold cavity, the mold core is placed in the mold cavity and connected with a pull rod penetrating through the upper mold, the pull rod is a hollow tube, one end of which is communicated with an injection molding machine and the other end of which is communicated with the mold cavity at the bottom of the mold core, the mold core is provided with an air filling device penetrating through the mold core and communicated with the mold cavity, the upper mold comprises a first upper mold, a second upper mold and a third upper mold which are placed in sequence, the first upper mold, the second upper mold, the third upper mold and the lower mold are all double-shell bodies forming a sealed interlayer, and heating pipes are arranged on the upper molds and communicated with the sealed interlayer in the double-shell bodies, a conical sealing block is arranged between the mold core and the pull rod, the mold core comprises a cylindrical upper mold core and a circular truncated cone-shaped lower mold core, the upper mold core is arranged on the upper bottom of the lower mold core, and the pull rod penetrates into the upper mold core from the top and penetrates out of the lower mold core from the bottom; The contact surface between the second upper mold and the first upper mold and the third upper mold is provided with an abrasive surface; During the injection molding process, air in the mold cavity escapes from the gap between the abrasive surfaces, so that the plastic fills the entire mold cavity; The air filling device comprises a high-pressure gas pipeline and a three-way switch valve, the high-pressure gas pipeline is communicated with the pull rod through the three-way switch valve to complete the switching operation of injection molding and air demolding, the three-way switch valve is an electric three-way switch valve, and a pressure gauge is arranged on the high-pressure gas pipeline.

2. The quick-release air bag mold of claim 1, wherein: The air filling device is a high-pressure gas pipe parallel to the pull rod, one end of the high-pressure gas pipe penetrates through the mold core and is communicated with the mold cavity at the bottom of the mold core, the other end of the high-pressure gas pipe is communicated with the high-pressure gas pipeline through a switch, the high-pressure gas pipe is provided with two high-pressure gas pipes which are symmetrically arranged with the pull rod, and a pressure gauge is arranged on the high-pressure gas pipeline.

3. The quick-release air bag mold of claim 1, wherein: The axes of the first upper mold, the second upper mold and the third upper mold coincide, a fixed plate which is an integral structure of the first upper mold is arranged on the first upper mold, and a fixed bolt is arranged on the fixed plate and extends into a threaded hole in the third upper mold.

4. The quick-release air bag mold of claim 1, wherein: The heating pipes comprise an inlet pipe and an outlet pipe, and a blocking partition plate is arranged in the sealed interlayer between the inlet pipe and the outlet pipe.

5. The quick-release air bag mold of claim 1, wherein: The heating pipes are connected with a heating device to perform flow circulation with the sealed interlayer.

6. A rapid demolding method of the air bag mold based on the rapid demolding air bag mold of any one of claims 1-5, which method is that, after the air bag is made, the three-way switch valve is actuated to make the pull rod communicated with the high-pressure gas pipeline, air is filled into the air bag through the high-pressure gas pipeline, the air bag is inflated, the bag opening of the air bag is expanded under the inflation force, the air bag is automatically demolded from the mold core and falls on the lower mold.

7. The rapid demolding method of the air bag mold according to claim 6, characterized by: During the air filling process, the air bag moves downward on the mold core, the mold core is placed on the bag opening of the air bag, and the bag opening of the air bag is expanded, so that the bag opening of the air bag is finally separated from the mold core.

8. The rapid demolding method of the air bag mold according to claim 6, characterized by: A pressure gauge is arranged on the high-pressure gas pipeline.

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