Space blow molding device

Abstract

This invention discloses a space blow molding device, comprising a first motor, a second motor, a liquid delivery structure, a film-forming rod, a gas channel, an air bladder, a first transmission structure, and a second transmission structure. The second motor controls the rotation of the film-forming rod, which sweeps across a hollow tube and touches a valve seat. The valve seat is pressed, and liquid flows out from the through-hole of the hollow tube, adhering to the film-forming rod and forming a film in the hollow tube. Gas in the air bladder moves outward from the gas channel. The hollow tube is located at the outlet of the gas channel. When the gas passes through, it blows out the liquid film, completing the shaping in a fixed mold. When the film-forming rod leaves the valve seat, the valve seat is released from pressure and returns to its original position under the action of a spring, blocking the through-hole.

Description

Technical Field

[0001] This invention relates to the field of blow molding equipment technology, specifically a blow molding device for space applications. Background Technology

[0002] Plastic products are widely used in all aspects of our lives due to their low cost, corrosion resistance, and ease of shaping, providing us with tremendous convenience. Blow molding is a processing method for plastic products, in which compressed air is rapidly introduced to form a plastic preform, resulting in hollow containers that are widely used for industrial packaging.

[0003] In the aerospace field, transporting pre-molded plastic products into space is impractical. Blow molding equipment can produce the required products on demand. However, considering the limitations of aerospace on the size and weight of transported objects, existing blow molding machines are large machines designed for mass production in non-vacuum conditions on Earth, making them unsuitable for aerospace applications. Summary of the Invention

[0004] The technical problem solved by this invention is to provide a space blow molding device that meets the requirements for simple and reliable molding. Furthermore, space is a vacuum state; making reasonable use of this vacuum state can simplify the blow molding device, making the design more simple and effective.

[0005] The technical solution adopted in this invention is: a space blow molding device, comprising a first motor, a second motor, a liquid delivery structure, a film-forming rod, a gas channel, an airbag, a first transmission structure, and a second transmission structure;

[0006] The first motor simultaneously controls the first transmission mechanism and the second transmission mechanism. The first transmission mechanism is a gear and lead screw transmission mechanism that drives the sealing gasket inside the liquid storage bottle to move. The second transmission mechanism controls the opening and closing of the gas channel through a crank mechanism, thereby controlling the gas output from the airbag.

[0007] The infusion structure includes a storage bottle, a hollow tube, a sealing gasket, a valve seat, and a spring. The storage bottle is connected to the hollow tube. The storage bottle contains a plastic liquid. The plastic liquid in the storage bottle is kept full of the storage bottle and the internal space of the hollow tube by the pushing of the sealing gasket. Several through holes are provided on the inner wall of the hollow tube. A valve seat is installed in each through hole. A spring connected to the valve seat is installed inside the hollow tube.

[0008] The second motor controls the rotation of the film-forming rod. The film-forming rod sweeps across the hollow tube and touches the valve seat. The valve seat is pressed, and the liquid flows out from the through hole of the hollow tube, adhering to the film-forming rod and forming a film in the hollow tube. The gas in the air bladder moves out of the gas channel. The hollow tube is set at the outlet of the gas channel. When the gas passes through, it blows the liquid film out and completes the shaping in the fixed mold. When the film-forming rod leaves the valve seat, the valve seat is released from pressure and returns to its original position under the action of the spring, blocking the through hole.

[0009] Furthermore, the second transmission structure includes a first shaft, a first bevel gear, a second bevel gear, a crank, a rod, and a baffle. A first motor is connected to the first shaft via a first coupling. The first bevel gear is installed at the end of the first shaft. The first bevel gear meshes with the second bevel gear to change the transmission direction. The second bevel gear is connected to the crank, the crank is connected to the rod, and the rod is connected to the baffle. The first motor drives the crank to pull the baffle up and down, controlling the opening and closing of the gas passage.

[0010] Furthermore, the first transmission structure includes a first gear, a second gear, a third gear, a fourth gear, a second shaft, a lead screw, and a lead screw mating body; the first gear is mounted on the first shaft, and the first gear meshes externally with the second, third, and fourth gears to form a gear set, which can adjust the speed; the fourth gear is connected to the lead screw through the second shaft; under the action of the first motor, the lead screw rotates, and the lead screw mating body pushes the sealing gasket to move under the rotation of the lead screw.

[0011] Furthermore, the second motor is connected to the film-forming rod via a second coupling, enabling the film-forming rod to move periodically and achieve sweeping film formation.

[0012] Furthermore, the infusion device is in a completely sealed state when the device is not in operation, to prevent the plastic liquid from being lost in space.

[0013] Furthermore, by changing the lengths of the crank and rod, the proportion of the opening and closing time of the gas passage can be altered, thus achieving the purpose of intermittent motion.

[0014] Furthermore, gas at a set pressure is injected into the airbag.

[0015] The advantages of this invention compared to the prior art are:

[0016] (1) This invention uses only two motors, with few power sources. The periodic opening and closing of the gas channel is achieved by the angle difference between the crank and the rod (16) of the crank-slider movement.

[0017] (2) The liquid storage device of the present invention has good airtightness and can operate normally in the weightless state of space.

[0018] (3) The gas with a certain pressure inside the airbag of the present invention can form a pressure difference in space and automatically diffuse outward, which simplifies the gas delivery structure. Attached Figure Description

[0019] Figure 1 This is an isometric view of an embodiment of the space blow molding device of the present invention.

[0020] Figure 2 This is a partial view of the hollow tube in an embodiment of the space blow molding device of the present invention.

[0021] Figure 3This is a partial view of the liquid storage bottle in an embodiment of the space blow molding device of the present invention. Detailed Implementation

[0022] The above solution will be further explained below with reference to specific implementation examples:

[0023] A device for performing blow molding in space includes two drive motors, an infusion device, a film-forming rod 12, a gas channel 13, an airbag 15, a gas delivery control device, and two transmission structures.

[0024] The structure of the aforementioned infusion device is as follows: a storage bottle 6 is connected to a circular hollow tube 7. The storage bottle 6 contains a plastic liquid, and the liquid inside the storage bottle 6 is constantly kept full of the entire storage bottle 6 and the internal space of the hollow tube 7 by the continuous advancement of the sealing gasket 5. The inner wall of the hollow tube 7 has multiple holes, which are blocked by a valve seat 8. At the same time, there is a spring 9 inside the hollow tube 7 connected to the valve seat 8. When the valve seat 8 is pressed, the liquid flows out from the hole. When the valve seat 8 is released from pressure, it returns to its original position under the action of the spring 9, blocking the hole and preventing the liquid from leaking out in the space.

[0025] The aforementioned first motor 24 simultaneously controls two transmission mechanisms. Its structure is as follows: the first motor 24 is connected to the first shaft 20 via the first coupling 23. The first shaft 20 is equipped with a first gear 21 and a first bevel gear 19. The first gear 21, the second gear 22, the third gear 25, and the fourth gear 1 form a gear set, allowing for speed adjustment. The fourth gear 1 is connected to the lead screw 3 via the second shaft 2. Under the action of the first motor 24, the lead screw 3 rotates. The lead screw mating body 4, under the rotation of the lead screw 3, pushes the sealing gasket 5 upwards, squeezing the plastic liquid to keep it constantly filling the entire internal space of the storage bottle 6 and the hollow tube 7. The first bevel gear 19 and the second bevel gear 18 cooperate to change the transmission direction. The second bevel gear 18 is connected to the crank 17, which is connected to the rod 16. The rod 16 is connected to the baffle 14. The first motor 24 drives the crank 17 slider mechanism to pull the baffle 14 up and down, achieving the purpose of controlling the opening and closing of the gas channel 13.

[0026] The second motor 10 controls the rotation of the film-forming rod 12. Its structure is as follows: the second motor 10 is connected to the film-forming rod 12 through the second coupling 11. By controlling the rotation of the second motor 10, the synchronous rotation of the film-forming rod 12 can be achieved. The film-forming rod 12 sweeps across the hollow tube 7 and touches the valve seat 8. The valve seat 8 is pressed, and the liquid flows out from the hole and adheres to the film-forming rod 12. The film-forming rod 12 can form a film in the hollow tube 7 after sweeping half a circle. The gas in the gasbag 15 is a fixed-pressure gas. When it is released in the space environment, due to the pressure difference, the gas will move out of the gas channel 13. The hollow tube 7 is at the outlet of the gas channel 13. When the gas passes through, it blows out the liquid film, which can be shaped in the fixed mold. When the film-forming rod 12 leaves the valve seat 8, the valve seat 8 is released from pressure and returns to its original position under the action of the spring 9, blocking the hole and preventing the liquid from leaking in space.

[0027] Example 1:

[0028] In this embodiment, see Figure 1 , Figure 3 A device capable of performing blow molding in space includes a first motor 24, a second motor 10, a first transmission structure, a second transmission structure, an infusion structure, a storage bottle 6, a sealing gasket 5, a gas channel 13, an airbag 15, a first coupling 23, a second coupling 11, and a film-forming rod 12.

[0029] The first transmission structure includes a first gear 21, a second gear 22, a third gear 25, a fourth gear 1, a second shaft 2, a lead screw 3, and a lead screw mating body 4. The first motor 24 drives a series of gears, including the first gear 21, the second gear 22, the third gear 25, and the fourth gear 1, to push the lead screw mating body 4 to move the sealing gasket 5 upward slowly, squeezing the plastic liquid so that it always keeps the entire internal space of the liquid storage bottle 6 and the hollow tube 7 full.

[0030] The second transmission structure includes a first shaft 20, a first bevel gear 19, a second bevel gear 18, a crank 17, a rod 16, and a baffle 14. The first motor 24 drives the first bevel gear 19 and the second bevel gear 18 to rotate through the first shaft 20, thereby driving the mechanism composed of the crank 17 and the rod 16 to move the baffle 14. Adjusting the length of the crank 17 and the rod 16 can realize the relative proportion of the opening and closing time of the gas channel 13, thereby achieving the purpose of intermittent control.

[0031] The infusion structure includes a hollow tube 7, a valve seat 8, and a spring 9.

[0032] In this embodiment, see Figure 1 The second motor 10 is connected to the film-forming rod 12 through the second coupling 11, and the motor drives the film-forming rod 12 to make periodic movements.

[0033] In this embodiment, see Figure 2The hollow tube 7 is connected to the liquid storage bottle 6. The inner wall of the hollow tube 7 has multiple holes, which are blocked by a valve seat 8. There is also a spring 9 inside the hollow tube 7 connected to the valve seat 8. When the film-forming rod 12 sweeps across the hollow tube 7 and touches the valve seat 8, the valve seat 8 is pressed, and the liquid flows out from the hole and adheres to the film-forming rod 12. The film-forming rod 12 can form a film in the hollow tube 7 after sweeping half a circle. When the film-forming rod 12 leaves the valve seat 8, the valve seat 8 is released from pressure and returns to its original position under the action of the spring 9, blocking the hole and preventing the liquid from being lost in space.

[0034] In this embodiment, see Figure 1 Gas channel 13 is connected to airbag 15. The gas in airbag 15 is a fixed pressure gas. When gas channel 13 is open, the gas will move out of gas channel 13 due to the pressure difference in the space environment. Hollow tube 7 is at the outlet of gas channel 13. When the gas passes through, it blows out the liquid film, which can be shaped in the fixed mold.

[0035] The blow molding principle of the device in this embodiment is as follows:

[0036] Under the action of the first motor 24, the plastic liquid fills the internal space of the storage bottle 6 and the hollow tube 7. The film-forming rod 12 sweeps across the hollow tube 7 and the valve seat 8. The plastic liquid adheres to the film-forming rod 12 and forms a film on the inner wall of the hollow tube 7 under the action of the film-forming rod 12. The gas with fixed pressure rushes out from the gas channel 13 due to the pressure difference with the vacuum. When it passes through the liquid film at the opening of the gas channel 13, it blows the film out and completes the blow molding work in the fixed mold.

[0037] As can be seen from the above embodiments, the space blow molding device has the characteristics of simple and reliable structure and few power sources. It can complete blow molding work in the vacuum and weightlessness state of space, which is of great significance to the current space manufacturing and solves the problem of complex structure and large size of current space blow molding devices.

[0038] The embodiments of the present invention have been described above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made according to the purpose of the invention. Any changes, modifications, substitutions, combinations or simplifications made based on the spirit and principle of the technical solution of the present invention shall be equivalent substitutions. As long as they meet the purpose of the invention and do not deviate from the technical principle and inventive concept of the space blow molding device of the present invention, they shall fall within the protection scope of the present invention.

[0039] The parts of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A space blow molding device, characterized in that, It includes a first motor (24), a second motor (10), an infusion structure, a membrane-building rod (12), a gas channel (13), an airbag (15), a first transmission structure, and a second transmission structure; The first motor (24) simultaneously controls the first transmission mechanism and the second transmission mechanism. The first transmission mechanism is a gear and screw transmission mechanism that drives the sealing gasket inside the liquid storage bottle (6) to move. The second transmission mechanism controls the opening and closing of the gas channel (13) through the crank mechanism to control the gas output in the air bag (15). The infusion structure includes a storage bottle (6), a hollow tube (7), a sealing gasket (5), a valve seat (8), and a spring (9); the storage bottle (6) is connected to the hollow tube (7), the storage bottle (6) contains a plastic liquid, and the plastic liquid in the storage bottle (6) is kept full of the storage bottle (6) and the internal space of the hollow tube (7) by the pushing of the sealing gasket (5); the inner wall of the hollow tube (7) is provided with several through holes, each through hole is equipped with a valve seat (8), and a spring (9) connected to the valve seat (8) is provided inside the hollow tube (7); The second motor (10) controls the film-forming rod (12) to rotate. The film-forming rod (12) sweeps across the hollow tube (7) and touches the valve seat (8). The valve seat (8) is pressed, and the liquid flows out from the through hole of the hollow tube (7), adheres to the film-forming rod (12), and forms a film in the hollow tube (7). The gas in the air bag (15) moves to the outside of the gas channel (13). The hollow tube (7) is set at the outlet of the gas channel (13). When the gas passes through, it blows out the liquid film and completes the shaping in the fixed mold. When the film-forming rod (12) leaves the valve seat (8), the valve seat (8) is released from the pressure and returns to its original position under the action of the spring (9), blocking the through hole. The second transmission structure includes a first shaft (20), a first bevel gear (19), a second bevel gear (18), a crank (17), a rod (16), and a baffle (14). A first motor (24) is connected to the first shaft (20) through a first coupling (23). The first bevel gear (19) is installed at the end of the first shaft (20). The first bevel gear (19) meshes with the second bevel gear (18) to change the transmission direction. The second bevel gear (18) is connected to the crank (17). The crank (17) is connected to the rod (16). The rod (16) is connected to the baffle (14). The first motor (24) drives the crank (17) to pull the baffle (14) up and down to control the opening and closing of the gas passage (13). The first transmission structure includes a first gear (21), a second gear (22), a third gear (25), a fourth gear (1), a second shaft (2), a lead screw (3), and a lead screw mating body (4); the first gear (21) is mounted on the first shaft (20), and the first gear (21) meshes externally with the second gear (22), the third gear (25), and the fourth gear (1) to form a gear set, which can adjust the speed. The fourth gear (1) is connected to the lead screw (3) through the second shaft (2). Under the action of the first motor (24), the lead screw (3) rotates, and the lead screw mating body (4) pushes the sealing gasket (5) to move under the rotation of the lead screw (3).

2. The space blow molding device according to claim 1, characterized in that, The second motor (10) is connected to the film-forming rod (12) through the second coupling (11) to realize the periodic movement of the film-forming rod (12) and realize sweeping film formation.

3. The space blow molding device according to claim 2, characterized in that, The infusion structure is in a completely sealed state when the device is not in operation, preventing the plastic liquid from being lost in space.

4. The space blow molding device according to claim 3, characterized in that, By changing the lengths of the crank (17) and rod (16), the opening and closing time ratio of the gas channel (13) is changed, thus achieving the purpose of intermittent motion.

5. The space blow molding device according to claim 1, characterized in that, Gas at a set pressure is injected into the airbag (15).

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