An inflatable moulding apparatus with automatic venting

Abstract

This invention belongs to the technical field of molding equipment, specifically an inflatable molding equipment with an automatic venting device. It includes a chamber containing the inflatable molding equipment, which consists of a press, an upper mold cavity, a lower mold cavity, and a hydraulic cylinder. A safety vent is located on the top of the press, and an automatic venting valve is fixedly installed on the inner wall of the safety vent. An air pump is fixedly installed inside the chamber, and an inflation circuit is established between the air pump and the press. An oil inlet circuit is located on one side of the hydraulic cylinder, and an oil control circuit is established between the automatic venting valve and the oil inlet circuit. By adding an automatic venting valve to the inflatable molding equipment, when the air pressure relationship between the hydraulic cylinder and the mold cavity approaches a critical value that cannot guarantee the sealing of the mold cavity, the automatic venting valve automatically vents and releases pressure, preventing or reducing leakage at the sealing surface, ensuring the safety of the product and personnel, and further facilitating the production of sheet metal.

Description

Technical Field

[0001] This invention belongs to the field of molding equipment technology, specifically an inflatable molding equipment with an automatic venting device. Background Technology

[0002] Sheet materials are flat, thick, and sheet-like materials, resembling a large flat or thin plate. They are among the most basic and widely used materials in industry, construction, and daily life. Sheet materials can be mainly divided into plastic sheets, metal sheets, wood, stone, composite materials, and foamed materials, and are widely used in building decoration, packaging and logistics, and daily necessities.

[0003] Inflatable molding equipment is a flexible molding device that uses compressed air or inflatable air bladders as the pressurizing medium, combined with heating and molds. It does not rely on heavy iron blocks or hydraulic rigid pressure heads, but rather inflates the air bladders to form, compact, and cure sheet materials, prepregs, or sheets. It is widely used in plastics, composite materials, thin metal sheets, and other fields. The core working principle is to use inflatable air bladders or rubber bladders to provide uniform pressure, replacing traditional rigid pressure heads. It can be adapted to curved or complex sheet material structures.

[0004] One type of existing inflatable molding equipment typically achieves pressure feedback and control by monitoring the air pressure in the mold cavity, and exhausts the air through electric or pneumatic control. To prevent failure of electric or pneumatic exhaust, it is also equipped with a manual switch valve for emergency exhaust in case of malfunction.

[0005] Since the air pressure inside the existing mold cavity is mostly controlled by the system, if the control system malfunctions, the manual switch valve may not be able to open in time in an emergency, which may result in the mold being opened under pressure. This could not only damage the product but also cause certain safety accidents. Furthermore, the exhaust valve releases gas with a certain amount of heat and recycling value, and direct discharge may also lead to a waste of resources.

[0006] Therefore, the present invention provides an inflatable molding device with an automatic venting device. Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0008] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides an inflatable molding equipment with an automatic exhaust device, which consists of a press, an upper mold cavity, a lower mold cavity, and a hydraulic cylinder. It includes a storage chamber, in which the press, upper mold cavity, lower mold cavity, and hydraulic cylinder are all located. A safety exhaust port is provided on the top of the press, and an automatic exhaust valve is fixedly installed on the inner wall of the safety exhaust port. An air pump is fixedly installed inside the storage chamber, and an air inflation circuit is provided between the air pump and the press. An oil inlet circuit is provided on one side of the hydraulic cylinder, and an oil control circuit is provided between the automatic exhaust valve and the oil inlet circuit. A heat recovery component and a gas recovery component are provided between the air pump and the automatic exhaust valve. The heat recovery component is used to recover and utilize the heat in the high-pressure gas discharged from the automatic exhaust valve, and the gas recovery component is used to recover and recycle the discharged high-pressure gas.

[0009] Preferably, the automatic exhaust valve includes a main valve, a pilot valve is provided on one side of the main valve, a pressure controller is provided on the top of the pilot valve, the air inlet end of the main valve is fixedly connected to the inner wall of the safety exhaust port, and an airflow circuit is provided between the pilot valve and the main valve.

[0010] Preferably, the pilot valve includes a valve body, inside which a valve core and a contact spring are installed. The valve body is used to connect with the automatic exhaust valve, the valve core is used to control the opening and closing of the three circuits of air inlet, air outlet and exhaust within the valve body, and the contact spring is used to provide the on / off preload force, the magnitude of which is controlled by a regulator.

[0011] Preferably, the heat recovery assembly includes a heat transfer tube, a water flow pipe is fixedly installed on the top of the tank, water flows inside the water flow pipe, the heat transfer tube is wound around the outside of the water flow pipe, and one end of the heat transfer tube is fixedly connected to the exhaust end of the main valve.

[0012] Preferably, the gas recovery assembly includes an air inlet pipe, which is fixedly installed on one side of the air pump. One end of the heat transfer pipe is fixedly connected to the top of the air inlet pipe. A slag-blocking disc is fixedly installed inside the air inlet pipe, and a water-filtering sponge is provided on one side of the slag-blocking disc. A flow-pushing assembly is provided inside the air inlet pipe.

[0013] Preferably, the propulsion assembly includes a motor, an air intake plate is fixedly installed on one side of the air intake chamber pipe, the motor is fixedly installed on one side of the air intake plate, a rotating rod is fixedly installed at the output end of the air intake plate, an air delivery fan blade is fixedly installed on the outer wall of the rotating rod, the air delivery fan blade is placed between the slag blocking plate and the filter sponge, and the outer wall of the rotating rod is rotatably connected to the inner wall of the slag blocking plate.

[0014] Preferably, a slag discharge pipe is fixedly installed at the bottom of the air inlet pipe, and a through-hole is opened on the inner wall of the air inlet pipe. The slag discharge pipe is placed below the through-hole. A slag scraper is fixedly installed on the outer wall of the rotating rod. One side of the slag scraper can scrape against the outer wall of the slag blocking disc. The slag scraper is placed on one side of the through-hole.

[0015] Preferably, the filter sponge is symmetrically and slidably provided with extrusion discs on both sides, and the two sides of the filter sponge can fit and contact the inner sides of the two extrusion discs. An air inlet is provided in the middle of the inner side of each of the two extrusion discs. An interlocking block is provided on the outer side of each of the two extrusion discs. The outer wall of each interlocking block can slide and connect with the inner wall of the two air inlet, and one side of each interlocking block can be flush with the inner side of the two extrusion discs. A filtrate port is provided on the inner wall of the air inlet tube. The filtrate port is located in the middle of the bottom of the filter sponge. A pushing component is provided on the outer side of each of the two interlocking blocks.

[0016] Preferably, the pushing assembly includes a rotating rod, which is fixedly installed on the outer wall of the air intake pipe. A gear is fixedly installed at the output end of the rotating rod. Connecting rods are fixedly installed on the outer walls of the two interlocking blocks. The outer walls of the connecting rods can slide to the inner wall of the air intake pipe. A toothed rod is fixedly installed at the top of each of the two connecting rods. The teeth on the two toothed rods can mesh with the teeth on the gear, and the two toothed rods are respectively placed on one side of the gear.

[0017] Preferably, a positioning block is fixedly installed on the outer wall of the air intake pipe, and rectangular plates are fixedly installed on the outer walls of the two extrusion discs. The outer walls of the two rectangular plates can be slidably connected to the inner wall of the air intake pipe, and a return spring is provided between one side of the two rectangular plates and the outer wall of the positioning block.

[0018] The beneficial effects of this invention are as follows: 1. The present invention provides an inflatable molding equipment with an automatic venting device. By adding an automatic venting valve to the inflatable molding equipment, when the relationship between the hydraulic cylinder and the air pressure in the mold cavity approaches the critical value that cannot guarantee the sealing of the mold cavity, the automatic venting valve automatically vents and releases pressure, which can prevent or reduce leakage of the sealing surface, ensure the safety of products and personnel, and further facilitate the production of sheet materials.

[0019] 2. The inflatable molding equipment with an automatic exhaust device of the present invention, when the automatic exhaust valve 5 is automatically venting, the heat recovery component and the gas recovery component between the air pump 6 and the automatic exhaust valve 5 will recover the exhaust gas accordingly, thereby performing relative heat recovery and gas recycling of the exhaust gas, improving the utilization rate of resources. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is an overall diagram of the invention; Figure 2 This is a main body diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the heat transfer pipe in this invention; Figure 4This is a schematic diagram of the automatic exhaust valve in this invention; Figure 5 This is a schematic diagram of the structure of the main valve in this invention; Figure 6 This is a schematic diagram of the valve core structure in this invention; Figure 7 This is a schematic diagram of the structure of the air intake tube in this invention; Figure 8 This is a schematic diagram of the structure of the slag-blocking disc in this invention; Figure 9 This is a schematic diagram of the structure of the interlocking block in this invention; Figure 10 This is a schematic diagram of the structure at the filtrate outlet in this invention.

[0022] In the diagram: 1. Tank; 101. Safety vent; 2. Water pipe; 201. Heat transfer pipe; 3. Press; 301. Upper mold cavity; 302. Lower mold cavity; 4. Hydraulic cylinder; 401. Oil inlet circuit; 402. Oil control circuit; 5. Automatic vent valve; 501. Main valve; 502. Pilot valve; 5021. Valve body; 5022. Valve core; 5023. Contact spring; 503. Pressure controller; 6. Air pump 601. Air inlet circuit; 7. Air inlet pipe; 701. Slag discharge pipe; 702. Air inlet disc; 8. Motor; 9. Filter sponge; 901. Squeezing disc; 902. Positioning block; 903. Return spring; 10. Slag blocking disc; 1001. Slag scraper; 11. Rotating rod; 1101. Toothed rod; 1102. Gear; 1103. Connecting rod; 12. Air supply fan blade; 13. Fitting block; 14. Filter outlet. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] like Figures 1 to 10As shown in the embodiment of the present invention, an inflatable molding equipment with an automatic venting device comprises a press 3, an upper mold cavity 301, a lower mold cavity 302, and a hydraulic cylinder 4. It includes a housing 1, with the press 3, upper mold cavity 301, lower mold cavity 302, and hydraulic cylinder 4 all housed inside the housing 1. A safety vent 101 is provided on the top of the press 3, and an automatic vent valve 5 is fixedly installed on the inner wall of the safety vent 101. The press 3 is used to improve the molding strength of the structure, the upper mold cavity 301 and lower mold cavity 302 provide space for the reaction, and the hydraulic cylinder 4 is used to control the upper mold cavity 301 and lower mold cavity. The clamping force is provided between 302, the automatic exhaust valve 5 is used to realize automatic exhaust, the air pump 6 is fixedly installed inside the chamber 1, the air pump 6 and the press 3 are provided with an air charging circuit 601, the hydraulic cylinder 4 is provided with an oil inlet circuit 401 on one side, the automatic exhaust valve 5 and the oil inlet circuit 401 are provided with an oil control circuit 402, the air pump 6 and the automatic exhaust valve 5 are provided with a heat recovery component and a gas recovery component. The heat recovery component is used to recover and utilize the heat in the high-pressure gas discharged from the automatic exhaust valve 5, and the gas recovery component is used to recover and recycle the discharged high-pressure gas. Since the air pressure inside the existing mold cavity is mostly controlled by the system, if the control system malfunctions, the manual switch valve may not be able to open in time in an emergency, which may result in the mold being opened under pressure. This may not only damage the product, but also cause certain safety accidents. When molding the sheet material, the polymer raw material is placed into the lower mold cavity 302. Then, the hydraulic cylinder 4 is driven to merge the lower mold cavity 302 with the upper mold cavity 301 to form a complete mold. Simultaneously, the air pump 6 is driven to inflate the mold cavity below the storage box 1 through the air inflator circuit 601. The mold then uses air pressure to mold the polymer raw material inside. The hydraulic cylinder 4 and press 3 work together to limit and tighten the lower mold cavity 302 and upper mold cavity 301, thus pressing the polymer raw material into a sheet material, thereby realizing the molding operation of the sheet material. When molding the raw material between the lower mold cavity 302 and upper mold cavity 301, the automatic exhaust valve 5 automatically applies pressure or releases pressure between them through the safety exhaust port 101 at the top of the press 3. Simultaneously, the automatic exhaust valve 5 controls the oil in the oil inlet circuit 401 through the oil control circuit 402, thereby controlling the hydraulic cylinder 4 to press the lower mold cavity 302 with the upper mold cavity 301. The mold cavity 302 performs automatic hydraulic pressurization and depressurization operations, enabling the molding of polymer materials. When the relationship between the hydraulic pressure of the oil cylinder and the air pressure of the mold cavity approaches the critical value that cannot guarantee the sealing of the mold cavity, the automatic exhaust valve 5 automatically vents and depressurizes to prevent or reduce leakage at the sealing surface, ensuring the safety of products and personnel. This also facilitates the production of sheet materials. When the automatic exhaust valve 5 is venting, the heat recovery component and gas recovery component between the air pump 6 and the automatic exhaust valve 5 will recover the discharged gas accordingly, thereby recovering the heat and recycling the gas, improving resource utilization. It should be noted that the sheet material manufactured by this device is a plastic sheet. During operation, the device mainly uses the hydraulic cylinder 4 to lock the lower mold cavity 302 and the upper mold cavity 301. Then, process gas is injected into the mold cavity to cause the raw materials in the mold cavity to undergo physical or chemical reactions, thereby foaming and manufacturing the sheet material.

[0025] like Figures 4 to 6 As shown, the automatic exhaust valve 5 includes a main valve 501, a pilot valve 502 is provided on one side of the main valve 501, and a pressure controller 503 is provided on the top of the pilot valve 502. The main valve 501 is used to discharge gas, the pilot valve 502 is used to control the opening and closing of the main valve 501, and the pressure controller 503 is used to control the opening and closing of the pilot valve 502. The air inlet end of the main valve 501 is fixedly connected to the inner wall of the safety exhaust port 101, and an airflow circuit is provided between the pilot valve 502 and the main valve 501. When the device is in normal working condition, that is, when the relationship between the hydraulic cylinder 4 and the mold cavity air pressure is insufficient to control the pressure controller 503 to open the pilot valve 502, the exhaust channel of the main valve 501 is in the closed state. The device can perform normal pressurization, pressure holding and pressure relief operations. When the relationship between the hydraulic cylinder 4 and the mold cavity air pressure exceeds the set value, the pressure controller 503 will open the pilot valve 502, and the exhaust channel of the main valve 501 will open to perform automatic pressure relief operation, thereby realizing automatic venting operation between the molds.

[0026] like Figures 5 to 6 As shown, the pilot valve 502 includes a valve body 5021. The valve body 5021 is internally equipped with a valve core 5022 and a contact spring 5023. The valve body 5021 is used to connect with the automatic exhaust valve 5. The valve core 5022 is used to control the opening and closing of the three circuits of air inlet, air outlet and exhaust within the valve body 5021. The contact spring 5023 is used to provide the on / off preload force, and the magnitude of the preload force is controlled by the regulator. When this device is in operation, when the inlet pressure is less than the preload of the contact spring 5023, the inlet and outlet of the valve body 5021 are connected, the exhaust port is disconnected, and the exhaust passage in the main valve 501 is closed. When the inlet pressure is greater than the preload of the contact spring 5023, the inlet of the valve body 5021 is disconnected, the outlet and exhaust port are connected, and the exhaust passage in the main valve 501 is opened, thereby achieving the function of automatically depressurizing the gas in the mold. It should be noted that the ratio of hydraulic pressure to air pressure in the pressure controller 503 can be fixed or adjusted online by adjusting the elastic force of the spring.

[0027] like Figures 2 to 4 As shown, the heat recovery assembly includes a heat transfer pipe 201. A water flow pipe 2 is fixedly installed on the top of the tank 1. Water flows inside the water flow pipe 2. The heat transfer pipe 201 is wrapped around the outside of the water flow pipe 2. One end of the heat transfer pipe 201 is fixedly connected to the exhaust end of the main valve 501. The heat transfer pipe 201 is used to circulate the high-pressure gas discharged from the main valve 501. When the automatic exhaust valve 5 discharges the gas from the mold, the gas will enter the heat transfer pipe 201 through the exhaust port of the main valve 501. The discharged airflow will flow along the inner wall of the heat transfer pipe 201. When the airflow flows, it will conduct heat to the outside of the water pipe 2 along the heat transfer pipe 201, so that the discharged heat can be conducted to the water pipe 2 along the heat transfer pipe 201, thereby preheating the water in the water pipe 2 for heating the domestic hot water required for the factory staff dormitory or bathroom, and playing the role of recovering and utilizing the heat in the discharged gas. It should be noted that the heat transfer pipe 201 is made of thermally conductive material.

[0028] like Figures 3 to 7As shown, the gas recovery assembly includes an air inlet pipe 7, which is fixedly installed on one side of the air pump 6. One end of the heat transfer pipe 201 is fixedly connected to the top of the air inlet pipe 7. A slag-blocking plate 10 is fixedly installed inside the air inlet pipe 7. A water-filtering sponge 9 is provided on one side of the slag-blocking plate 10. A flow-pushing assembly is provided inside the air inlet pipe 7. The flow-pushing assembly is used to push the airflow flowing into the air inlet pipe 7 through the slag-blocking plate 10 and the water-filtering sponge 9 into the air pump 6. When the discharged gas heats the water in the water pipe 2 after passing through the heat transfer pipe 201, the gas will enter the air inlet pipe 7 along the heat transfer pipe 201. Driven by the flow propulsion component, the gas will flow along the slag-blocking disc 10 into the water filter sponge 9, and finally return to the air pump 6 for recycling, thus performing gas recovery and reuse. When the gas flows in the air inlet pipe 7, the slag-blocking disc 10 will block solid impurities in the gas. Simultaneously, after the gas undergoes heat dissipation and condensation, it may contain a certain amount of moisture. Therefore, when the gas passes through the filter... When the water sponge 9 flows, it will block and absorb the moisture in the gas, thereby reducing the water content of the gas when it enters the air pump 6 for recirculation. This facilitates the subsequent gas recovery and reuse by the air pump 6. It should be noted that the air pump 6 should be equipped with a circulation purification mechanism, which includes a drying unit and a gas purification unit. It is mainly used to purify the residual moisture content in the gas entering the air pump 6 and the heterogeneous gases in the air. This is existing technology, so it is only described in this solution and the specific structure is not shown.

[0029] like Figures 8 to 10 As shown, the propulsion assembly includes a motor 8, an air inlet plate 702 is fixedly installed on one side of the air inlet pipe 7, the motor 8 is fixedly installed on one side of the air inlet plate 702, a rotating rod is fixedly installed at the output end of the air inlet plate 702, an air delivery fan blade 12 is fixedly installed on the outer wall of the rotating rod, the air delivery fan blade 12 is placed between the slag blocking plate 10 and the filter sponge 9, and the outer wall of the rotating rod is rotatably connected to the inner wall of the slag blocking plate 10. When gas needs to be circulated, the drive motor 8 is rotated, which in turn drives the air delivery fan blade 12 to rotate via a rotating rod. When the air delivery fan blade 12 rotates, it generates a rotational attraction force, thereby drawing the gas inside the heat transfer tube 201 and the gas outside the air inlet tube 7. The external gas then flows along the air inlet plate 702 and the gas inside the heat transfer tube 201 through the traction of the air delivery fan blade 12, passing through the slag-blocking plate 10 and into the water filter sponge 9. This allows the gas to pass through the slag-blocking plate 10 and the water filter sponge 9 and enter the air pump 6, thus propelling the gas.

[0030] like Figures 8 to 9As shown, a slag discharge pipe 701 is fixedly installed at the bottom of the air inlet pipe 7. A through-hole is opened on the inner wall of the air inlet pipe 7. The slag discharge pipe 701 is placed below the through-hole. A slag scraper 1001 is fixedly installed on the outer wall of the rotating rod. One side of the slag scraper 1001 can scrape against the outer wall of the slag blocking disc 10. The slag scraper 1001 is placed on one side of the through-hole. When the motor 8 drives the air-feeding fan blade 12 to rotate via the rotating rod, the rotating rod will drive the slag-removing scraper 1001 to rotate and scrape on one side of the slag-blocking plate 10. The slag-removing scraper 1001 will scrape the impurities blocked from the gas on the slag-blocking plate 10, thereby scraping the impurities into the through-hole, and finally through the through-hole to fall out of the slag discharge pipe 701 and out of the air inlet pipe 7, thus preventing impurities from accumulating on the slag-blocking plate 10 and thus preventing the flow of gas, thereby playing the role of slag discharge.

[0031] like Figures 9 to 10 As shown, the filter sponge 9 has symmetrically sliding extrusion discs 901 on both sides. The two sides of the filter sponge 9 can fit and contact the inner sides of the two extrusion discs 901. An air inlet filter is opened in the middle of the inner side of each of the two extrusion discs 901. An interlocking block 13 is provided on the outer side of each of the two extrusion discs 901. The outer wall of each interlocking block 13 can slide and connect with the inner wall of each of the two air inlet filters. One side of each interlocking block 13 can be flush with the inner side of each of the two extrusion discs 901. A liquid filter port 14 is opened on the inner wall of the air inlet pipe 7. The liquid filter port 14 is located at the bottom of the filter sponge 9 and can correspond to the middle position of the filter sponge 9. A pushing component is provided on the outside of each of the two interlocking blocks 13. The pushing component is used to drive the extrusion discs 901 to squeeze the filter sponge 9 through the interlocking blocks 13. When the gas completely enters the air pump 6 through the water-filtering sponge 9, the pushing assembly is driven to move the fitting block 13 towards the air inlet of the two extrusion discs 901. When the fitting block 13 is fully inserted into the air inlet and parallel to the inner side of the extrusion discs 901, the fitting block 13 will drive the extrusion discs 901 to squeeze the water-filtering sponge 9. This causes the two extrusion discs 901 to squeeze the water-filtering sponge 9 from both sides. The squeezed water will flow out of the water-filtering sponge 9 through the filtrate outlet 14, preventing the water-filtering sponge 9 from absorbing too much water, which would affect the next absorption of water from the gas. This effectively squeezes water out of the water-filtering sponge 9.

[0032] like Figures 9 to 10As shown, the pushing assembly includes a rotating rod 11, which is fixedly installed on the outer wall of the air intake pipe 7. A gear 1102 is fixedly installed at the output end of the rotating rod 11. A connecting rod 1103 is fixedly installed on the outer wall of each of the two fitting blocks 13. The outer wall of the connecting rod 1103 can slide to connect with the inner wall of the air intake pipe 7. A toothed rod 1101 is fixedly installed at the top of each of the two connecting rods 1103. The teeth on the two toothed rods 1101 can mesh with the teeth on the gear 1102, and the two toothed rods 1101 are respectively placed on one side of the gear 1102. When it is necessary to move the interlocking block 13, the self-rotating rod 11 is driven to rotate, which in turn drives the gear 1102 to rotate. When the gear 1102 rotates, it drives the two racks 1101 to move in opposite directions through tooth meshing. The two racks 1101 then drive the two interlocking blocks 13 to move towards the air inlet of the two extrusion discs 901 through the connecting rod 1103. When the interlocking block 13 is flush with the inner side of the extrusion disc 901, the connecting rod 1103 will then fit against the outer wall of the extrusion disc 901. The self-rotating rod 11 drives the gear 1102 to rotate continuously, and the two racks 1101 will push the extrusion disc 901 through the connecting rod 1103, thereby causing the extrusion disc 901 to perform the extrusion operation on the water filter sponge 9, which serves to move the two extrusion discs 901. It should be noted that the connecting rod 1103 is covered with a sealing element.

[0033] like Figures 9 to 10 As shown, a positioning block 902 is fixedly installed on the outer wall of the air intake pipe 7, and rectangular plates are fixedly installed on the outer walls of the two extrusion discs 901. The outer walls of the two rectangular plates can slide to connect with the inner wall of the air intake pipe 7. A return spring 903 is provided between one side of the two rectangular plates and the outer wall of the positioning block 902. When the rack 1101 pushes the extrusion plate 901 to extrude the filter sponge 9 via the connecting rod 1103, the rectangular plate on the outer wall of the extrusion plate 901 will slide inside the air inlet pipe 7. The rectangular plate will then press the return spring 903 to move towards the positioning block 902. When the extrusion plate 901 finishes extruding the filter sponge 9, the rack 1101 drives the fitting block 13 to reset via the connecting rod 1103. The outer sides of the two extrusion plates 901 will lose the limiting extrusion force, and the two extrusion plates 901 will reset under the elastic push of the return spring 903. This serves to push the two extrusion plates 901 to reset after extrusion. It should be noted that the outer wall of the rectangular plate is covered with a sealing element.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic molding equipment with an automatic venting device, comprising a press, an upper mold cavity, a lower mold cavity, and a hydraulic cylinder, characterized in that: The system includes a storage bin, a press, an upper mold cavity, a lower mold cavity, and hydraulic cylinders, all housed inside the storage bin. A safety vent is located on the top of the press, and an automatic vent valve is fixedly installed on the inner wall of the vent. An air pump is fixedly installed inside the storage bin, with an air charging circuit between the air pump and the press. An oil inlet circuit is located on one side of the hydraulic cylinder, and an oil control circuit is located between the automatic vent valve and the oil inlet circuit. A heat recovery component and a gas recovery component are installed between the air pump and the automatic vent valve. The heat recovery component recovers and utilizes the heat in the high-pressure gas discharged from the automatic vent valve, while the gas recovery component recycles and reuses the discharged high-pressure gas.

2. An airform and transfer molding apparatus with automatic venting as defined in claim 1, wherein: The automatic exhaust valve includes a main valve, a pilot valve on one side of the main valve, a pressure controller on the top of the pilot valve, a fixed connection between the air inlet of the main valve and the inner wall of the safety exhaust port, and an airflow circuit between the pilot valve and the main valve.

3. An airform and transfer molding apparatus with automatic venting as defined in claim 2, wherein: The pilot valve includes a valve body, inside which are a valve core and a contact spring. The valve body is used to connect with the automatic exhaust valve. The valve core is used to control the opening and closing of the three circuits of air inlet, air outlet and exhaust within the valve body. The contact spring is used to provide the on / off preload force, and the magnitude of the preload force is controlled by the regulator.

4. An apparatus according to claim 2, wherein: The heat recovery assembly includes a heat transfer tube, a water flow pipe fixedly installed on the top of the tank, water flow inside the water flow pipe, the heat transfer tube wrapped around the outside of the water flow pipe, and one end of the heat transfer tube fixedly connected to the exhaust end of the main valve.

5. An apparatus as claimed in claim 4, wherein: The gas recovery assembly includes an air inlet pipe, which is fixedly installed on one side of the gas pump. One end of the heat transfer tube is fixedly connected to the top of the air inlet pipe. A slag-blocking plate is fixedly installed inside the air inlet pipe, and a water-filtering sponge is provided on one side of the slag-blocking plate. A flow-pushing assembly is provided inside the air inlet pipe.

6. An apparatus as claimed in claim 5, wherein: The propulsion assembly includes a motor, an air inlet disc is fixedly installed on one side of the air inlet chamber, the motor is fixedly installed on one side of the air inlet disc, a rotating rod is fixedly installed at the output end of the air inlet disc, an air delivery fan blade is fixedly installed on the outer wall of the rotating rod, the air delivery fan blade is placed between the slag blocking disc and the filter sponge, and the outer wall of the rotating rod is rotatably connected to the inner wall of the slag blocking disc.

7. The inflatable molding equipment with an automatic venting device according to claim 6, characterized in that: A slag discharge pipe is fixedly installed at the bottom of the air inlet pipe. A through-hole is opened on the inner wall of the air inlet pipe. The slag discharge pipe is placed below the through-hole. A slag scraper is fixedly installed on the outer wall of the rotating rod. One side of the slag scraper can scrape against the outer wall of the slag blocking disc. The slag scraper is placed on one side of the through-hole.

8. The inflatable molding equipment with an automatic venting device according to claim 6, characterized in that: The filter sponge has symmetrically sliding extrusion discs on both sides, and the two sides of the filter sponge can fit in contact with the inner sides of the two extrusion discs. An air inlet is opened in the middle of the inner side of each of the two extrusion discs. An interlocking block is set on the outer side of each of the two extrusion discs. The outer wall of each interlocking block can slide and connect with the inner wall of each of the two air inlet filters. One side of each interlocking block can be flush with the inner side of each of the two extrusion discs. A liquid filtrate port is opened on the inner wall of the air inlet tube. The liquid filtrate port is located in the middle of the bottom of the filter sponge. A pushing component is set on the outer side of each of the two interlocking blocks.

9. A pneumatic molding equipment with an automatic venting device according to claim 8, characterized in that: The pushing assembly includes a rotating rod, which is fixedly installed on the outer wall of the air intake pipe. A gear is fixedly installed at the output end of the rotating rod. Connecting rods are fixedly installed on the outer walls of the two fitting blocks. The outer walls of the connecting rods can slide to the inner wall of the air intake pipe. A toothed rod is fixedly installed at the top of each of the two connecting rods. The teeth on the two toothed rods can mesh with the teeth on the gear, and the two toothed rods are respectively placed on one side of the gear.

10. A pneumatic molding equipment with an automatic venting device according to claim 8, characterized in that: A positioning block is fixedly installed on the outer wall of the air intake pipe, and rectangular plates are fixedly installed on the outer walls of the two extrusion discs. The outer walls of the two rectangular plates can slide to connect with the inner wall of the air intake pipe. A return spring is provided between one side of the two rectangular plates and the outer wall of the positioning block.

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