PE bulletproof plate forming die

Abstract

The utility model discloses a PE bulletproof plate forming die, a plurality of jacking cavities are formed in a lower die of the die, jacking assemblies are arranged in the jacking cavities, each jacking assembly comprises a jacking block, a lifting rod and a hydraulic cylinder, the bottom of each jacking block is connected to the corresponding lifting rod, and the bottom of each lifting rod is connected to the corresponding hydraulic cylinder. The top of the jacking block is attached to the upper surface of the lower die in shape, the side wall of the jacking block is attached to the inner wall of the jacking cavity, an inner ventilation pipeline is arranged in the lifting rod, an air inlet and an air outlet of the inner ventilation pipeline are staggered vertically, a sealing ring is arranged on the inner wall of the jacking cavity and comprises a check ring and a sealing washer, the check ring is fixedly connected with the inner wall of the jacking cavity, and the sealing washer is fixedly connected with the check ring. An air inlet pipeline is arranged to be communicated with the first jacking cavity, the jacking cavities are connected through a connecting pipeline, and an air outlet pipeline is arranged to be connected with the tail jacking cavity. The demolding device is high in demolding automation degree and rapid in demolding.

Description

Technical Field

[0001] The utility model relates to the technical field of PE bulletproof plates, in particular to a PE bulletproof plate forming die. Background Art

[0002] Ultra-high molecular weight polyethylene (UHMWPE) is a type of polyethylene fiber made by spinning and ultra-stretching. Lamination fabrics made from UHMW fibers are widely used in PE bulletproof panels due to their excellent energy absorption capabilities.

[0003] To create the non-woven fabric composite, ultra-high molecular weight polyethylene fibers are first laid out side by side in one direction and compounded with a resin to form a non-woven fabric. Multiple layers of this fabric are then stacked and placed in a mold. Heat-pressed at a controlled temperature and pressure, the fibers of adjacent non-woven fabrics are aligned at non-zero angles. Because the non-woven fabric lacks connection points, the stress waves generated by a bullet are not superimposed due to resonance, effectively dissipating the bullet's kinetic energy.

[0004] The problem is that existing PE bulletproof panels tend to stick to the surface of the lower mold after hot pressing, making it difficult to demold the PE bulletproof panels. The usual practice is for the operator to use an air gun to blow the newly formed PE bulletproof panels from the side and bottom to accelerate the cooling of the PE bulletproof panels. The PE bulletproof panels can then be quickly removed by blowing the air upward from the bottom. This method has low production efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide a PE bulletproof plate forming mold with a high degree of automation and automatic demoulding of the PE bulletproof plate in response to the deficiencies in the prior art.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is: a PE bulletproof plate forming mold, including a hydraulic press, the hydraulic press is provided with an upper mounting plate and a lower mounting plate, the lower mounting plate is slidably arranged in the hydraulic press, a lower mold is arranged to be mounted on the lower mounting plate, an upper mold is arranged to be mounted under the upper mounting plate, a plurality of jacking cavities are opened in the lower mold, a jacking assembly is provided in the jacking cavity, the jacking assembly includes a jacking block, a lifting rod and a hydraulic cylinder, the bottom of the jacking block is connected to the lifting rod, the bottom of the lifting rod is connected to the hydraulic cylinder, the top of the jacking block is connected to the lifting rod, the bottom of the lifting rod is connected to the hydraulic cylinder, and the top of the jacking block is connected to the lifting rod. The shape of the upper surface of the lower mold is fitted, the side wall of the jacking block is fitted with the inner wall of the jacking cavity, an internal ventilation pipe is provided inside the lifting rod, the positions of the air inlet and air outlet of the internal ventilation pipe are staggered up and down, and a sealing ring is provided on the inner wall of the jacking cavity. The sealing ring includes a retaining ring and a sealing gasket. The retaining ring is fixed to the inner wall of the jacking cavity, the sealing ring is fixed to the retaining ring, and the inner ring of the sealing ring slides in accordance with the outer wall of the lifting rod. An air inlet pipe is provided to connect to the first jacking cavity, and the jacking cavities are connected by connecting pipes. An air outlet pipe is provided to connect to the last jacking cavity.

[0007] Preferably, a double-position sealing ring is provided in the last lifting cavity, the double-position sealing ring includes an upper sealing ring and a lower sealing ring, and the connection point between the air outlet duct and the last lifting cavity is located between the upper sealing ring and the lower sealing ring.

[0008] Preferably, the distance between the upper sealing ring and the lower sealing ring is greater than the inner wall diameter of the air outlet pipe, and the inner diameter of the air outlet of the inner ventilation pipe is smaller than the distance between the upper sealing ring and the lower sealing ring.

[0009] Preferably, the shape of the internal ventilation pipeline is Z-shaped, and the vertical height distance between the air inlet and the air outlet of the internal ventilation pipeline is greater than the maximum vertical distance of the double-position sealing ring.

[0010] Preferably, the air inlet pipeline is connected to an air source.

[0011] Preferably, the air outlet duct is connected to the air.

[0012] Compared with the prior art, the utility model has the following advantages: the utility model realizes automatic demoulding of the formed PE bulletproof plate through the jacking cavity and the jacking assembly, and blows and cools the jacked PE bulletproof plate through the internal ventilation pipeline arranged inside, thereby further accelerating the demoulding of the PE bulletproof plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of the overall structure of the utility model.

[0014] Figure 2 It is a sectional view of the lower die in the utility model.

[0015] Figure 3 It is a schematic diagram of the airflow direction of the third lifting chamber in the initial state in the embodiment of the present utility model.

[0016] Figure 4 It is a schematic diagram of the airflow direction after the jacking assembly of the third jacking chamber is jacked up in an embodiment of the present utility model.

[0017] Figure 5 It is a structural diagram of the sealing ring in the utility model.

[0018] Among them, 11-hydraulic press, 12-upper mounting plate, 13-upper mold, 14-lower mounting plate, 15-lower mold, 21-first lifting cavity, 22-second lifting cavity, 23-third lifting cavity, 24-air inlet pipe, 25-air outlet pipe, 26-connecting pipe, 27-sealing ring, 28-retaining ring, 29-sealing gasket, 31-internal ventilation pipe, 32-lifting block, 33-lifting rod, 34-hydraulic cylinder, 35-upper sealing ring, 36-lower sealing ring. DETAILED DESCRIPTION

[0019] The present invention is further illustrated below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, modifications of various equivalent forms of the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0020] like Figures 1 to 5 The PE bulletproof plate forming mold shown includes a hydraulic press 11, which is provided with an upper mounting plate 12 and a lower mounting plate 14. The lower mounting plate 14 is slidably arranged in the hydraulic press 11, and a lower mold 15 is arranged to be mounted on the lower mounting plate 14. An upper mold 13 is arranged to be mounted under the upper mounting plate 12. The upper mold 13 and the lower mold 15 can be replaced according to the shape of the PE bulletproof plate. At the same time, the lower mold 15 can move forward and backward with the lower mounting plate 14. After the PE bulletproof plate is hot-pressed in the hydraulic press 11, the upper mold 13 rises and the lower mold 15 moves forward with the lower mounting plate 14, which facilitates the operator to carry out the next step of demoulding and multi-layer stacking of non-woven fabrics.

[0021] Three lifting cavities are opened in the lower mold 15, namely the first lifting cavity 21, the second lifting cavity 22 and the third lifting cavity 23. The first lifting cavity 21, the second lifting cavity 22 and the third lifting cavity 23 are all provided with a lifting assembly, the lifting assembly includes a lifting block 32, a lifting rod 33 and a hydraulic cylinder 34. The bottom of the lifting block 32 is connected to the lifting rod 33, and the bottom of the lifting rod 33 is connected to the hydraulic cylinder 34. In the initial installation state, the top of the lifting block 32 is in conformity with the shape of the upper surface of the lower mold 15 and is coplanar, the side wall of the lifting block 32 is in conformity with the inner wall of the lifting cavity, and an internal ventilation pipe 31 is provided inside the lifting rod 33. The positions of the air inlet and the air outlet of the internal ventilation pipe 31 are staggered up and down, and the shape of the internal ventilation pipe 31 is Z-shaped. The vertical height distance between the air inlet and the air outlet of the internal ventilation pipe 31 is greater than the maximum vertical distance of the double-position sealing ring;

[0022] A sealing ring 27 is provided on the inner wall of the jacking cavity. The sealing ring 27 includes a retaining ring 28 and a sealing gasket 29. The retaining ring 28 is fixed to the inner wall of the jacking cavity, and the sealing ring is fixed to the retaining ring 28. The inner ring of the sealing ring slides against the outer wall of the lifting rod 33. An air inlet pipe 24 is provided to connect the first jacking cavity 21. The first jacking cavity 21 and the second jacking cavity 22, the second jacking cavity 22 and the third jacking cavity 23 are connected by a connecting pipe 26. An air outlet pipe 25 is provided to connect the third jacking cavity 23. It needs to be further explained that in the initial state, the vertical height of the air inlet of the internal ventilation pipe 31 is lower than the vertical height of the sealing ring. The gas can only pass from the air inlet pipe 24 to the first jacking cavity 21 and then to the second jacking cavity 22, the third jacking cavity 23 and the air outlet pipe 25 in turn;

[0023] The jacking cavity at the end is provided with a double-position sealing ring, which includes an upper sealing ring 35 and a lower sealing ring 36. The connection point between the air outlet pipe 25 and the third jacking cavity 23 is located between the upper sealing ring 35 and the lower sealing ring 36. The distance between the upper sealing ring 35 and the lower sealing ring 36 is greater than the inner wall diameter of the air outlet pipe 25, and the inner diameter of the air outlet of the inner ventilation pipe 31 is smaller than the distance between the double-position sealing rings. The air inlet pipe 24 is connected to the air source, and the air outlet pipe 25 is connected to the air. It needs to be further explained that after the hydraulic cylinder 34 is started, the lifting rod 33 rises with the hydraulic cylinder 34, and the air outlet of the inner ventilation pipe is connected to the space above the sealing ring 27, and the air inlet of the inner ventilation pipe is connected to the space below the sealing ring 27. At the same time, after the lifting rod 33 lifts the lifting block 32, the jacking Channels are formed between the two ends of the lifting block 32 and the lower mold 15, so that gas can escape from the channels. Accordingly, the gas enters from the air inlet pipe 24 in turn and is divided into two paths. One path continues to the second lifting chamber 22 through the connecting pipe 26, and the other path is from the internal ventilation pipe 31 to the space above the sealing ring 27 in the first lifting chamber 21 and escapes. The gas entering the second lifting chamber 22 is also divided into two paths. One path continues to the third lifting chamber 23 through the connecting pipe 26, and the other path is from the internal ventilation pipe 31 to the space above the sealing ring 27 in the second lifting chamber 22 and escapes. The gas entering the third lifting chamber 23 can also only escape to the space above the upper sealing ring 35 in the third lifting chamber 23 through the internal ventilation pipe 31, thereby ensuring sufficient air pressure to escape from the three lifting chambers.

[0024] Working process and principle of this utility model:

[0025] Before hot pressing, the staff first superimposes multiple layers of non-woven fabrics on the surface of the lower mold 15, and starts the hydraulic press 11 to hot press the multiple layers of non-woven fabrics. At this time, the air source enters the space below the sealing ring 27 in the first lifting chamber 21 through the air inlet pipe 24 and further enters the space below the sealing ring 27 in the second lifting chamber 22 through the connecting pipe 26. Then, it enters the space between the upper sealing ring 35 and the lower sealing ring 36 in the third lifting chamber through the connecting pipe 26 and escapes through the air outlet pipe 25. During the whole process, the gas cannot enter the space above the sealing ring 27 in any lifting chamber.

[0026] The formed PE bulletproof plate is attached to the lower mold 15. At this time, all the hydraulic cylinders 34 are started to lift the lifting rods 33, and the lifting blocks 32 lift the bottom of the formed PE bulletproof plate. The passing gas escapes to the space above the sealing ring 27, further blowing and cooling the bottom of the PE bulletproof plate at high speed, accelerating the demoulding of the PE bulletproof plate.

[0027] The foregoing description shows and describes preferred embodiments of the present invention. As previously mentioned, it should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the present invention as taught herein or through the techniques or knowledge of the relevant art. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A PE bulletproof plate forming mold, comprising a hydraulic press, wherein the hydraulic press is provided with an upper mounting plate and a lower mounting plate, wherein the lower mounting plate is slidably mounted in the hydraulic press, a lower mold is mounted on the lower mounting plate, and an upper mold is mounted under the upper mounting plate, wherein: There are several lifting cavities in the lower mold, and a lifting assembly is provided in the lifting cavity. The lifting assembly includes a lifting block, a lifting rod and a hydraulic cylinder. The bottom of the lifting block is connected to the lifting rod, and the bottom of the lifting rod is connected to the hydraulic cylinder. The top of the lifting block fits the shape of the upper surface of the lower mold, and the side wall of the lifting block fits the inner wall of the lifting cavity. An internal ventilation pipe is provided inside the lifting rod, and the positions of the air inlet and the air outlet of the internal ventilation pipe are staggered up and down. A sealing ring is provided on the inner wall of the jacking cavity, and the sealing ring includes a retaining ring and a sealing gasket. The retaining ring is fixed to the inner wall of the jacking cavity, and the sealing ring is fixed to the retaining ring. The inner ring of the sealing ring slides against the outer wall of the lifting rod. An air inlet pipe is provided to connect the first jacking cavity, and the jacking cavities are connected by connecting pipes, and an air outlet pipe is provided to connect the last jacking cavity.

2. The PE bulletproof plate forming mold according to claim 1, characterized in that: A double-position sealing ring is provided in the jacking cavity at the end, and the double-position sealing ring includes an upper sealing ring and a lower sealing ring. The connection point between the air outlet pipe and the jacking cavity at the end is located between the upper sealing ring and the lower sealing ring.

3. The PE bulletproof plate forming mold according to claim 2, characterized in that: The distance between the upper sealing ring and the lower sealing ring is greater than the inner wall diameter of the air outlet pipe, and the inner diameter of the air outlet of the inner ventilation pipe is smaller than the distance between the upper sealing ring and the lower sealing ring.

4. The PE bulletproof plate forming mold according to claim 3, characterized in that: The shape of the internal ventilation pipeline is Z-shaped, and the vertical height distance between the air inlet and the air outlet of the internal ventilation pipeline is greater than the maximum vertical distance of the double-position sealing ring.

5. The PE bulletproof plate forming mold according to claim 1, characterized in that: The air inlet pipe is connected to the air source.

6. The PE bulletproof plate forming mold according to claim 1, characterized in that: The air outlet duct is connected to the air.

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