Internal pressure balancing device for plastic extrusion die

Abstract

The utility model discloses an internal pressure balancing device for a plastic extrusion die, which relates to the technical field of pressure balancing and comprises a die box, a bottom plate arranged at the bottom of the die box, a detection component arranged on a hydraulic cylinder and comprising an elastic sheet, and a shifting sheet arranged on one side, far away from the elastic sheet, of the hydraulic cylinder. First fixing rods are arranged on the two sides, close to the hydraulic cylinder, of the top of the bottom plate correspondingly, second fixing rods are slidably connected to the first fixing rods, an elastic piece and a shifting piece are arranged on the two second fixing rods correspondingly, extension rods are arranged on the hydraulic cylinder and the second fixing rods correspondingly, and a button is arranged at the bottoms of the extension rods. The pressure adjusting assembly comprises a guide pipe, the guide pipe is fixedly communicated with a vacuum pump, the detection assembly is arranged, the air pressure in the mold box in the extrusion process is detected, when the air pressure is too low, the vacuum pump is started to inject air into the mold box, otherwise, the vacuum pump is pumped out of the mold box, the internal pressure balance is guaranteed, and the mold is prevented from being abraded in the extrusion process.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure balance, in particular to an internal pressure balance device for a plastic extrusion die. Background Art

[0002] The internal pressure balancing device for plastic extrusion molds is usually a mechanical system built into the mold to adjust and stabilize the pressure inside the extrusion mold during the processing of plastic materials.

[0003] An existing Chinese patent (publication number: CN215791640U) proposes a plastic extrusion mold, which belongs to the field of extrusion mold technology, and includes a base, a mold base and a support column. The mold base is arranged at the upper end of the base, and four support columns are provided, and the four support columns are fixedly connected to the four ends between the mold base and the base. A groove is opened at the upper end of the mold base, and a fixed frame is provided on the left and right sides of the groove, and the fixed frames on the left and right sides are connected to the mold base through the groove. Extrusion tubes are provided inside the fixed frames on both sides, and the extrusion tubes are connected to the fixed frames through the base. Four protective tubes are provided at the upper end of the base, and the four protective tubes are connected to the left and right sides of the upper end of the base in groups of two.

[0004] In the above technical solution, the plastic extrusion die can extrude the components connected to the product. In this case, the product can be extruded together without causing pressure on the product itself, thereby ensuring the integrity of the product. In addition, the extrusion efficiency of this device is higher and the practicality is strong.

[0005] However, the above device does not have a pressure balancing structure during the extrusion process. Due to the uneven internal air pressure, the extrusion mold is more likely to be damaged due to uneven wear, which increases the frequency and cost of mold maintenance and replacement. Therefore, we propose an internal pressure balancing device for plastic extrusion molds. Utility Model Content

[0006] The purpose of the utility model is to provide an internal pressure balancing device for a plastic extrusion die to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an internal pressure balancing device for a plastic extrusion mold, comprising a mold box, a bottom plate is provided at the bottom of the mold box, an extrusion assembly is provided on the top of the bottom plate, the extrusion assembly includes a hydraulic cylinder, a detection assembly is provided on the hydraulic cylinder, the detection assembly includes a spring, a paddle is provided on the side of the hydraulic cylinder away from the spring, a first fixed rod is provided on both sides of the top of the bottom plate close to the hydraulic cylinder, a second fixed rod is slidably connected to the first fixed rod, and two second fixed rods are respectively provided with a spring and a paddle, an extension rod is provided on the hydraulic cylinder and the second fixed rod, a button is provided at the bottom of the extension rod, an alarm is provided on the mold box, a pressure regulating assembly is provided on the mold box, the pressure regulating assembly includes a conduit, and a vacuum pump is fixedly connected to the conduit.

[0008] As a preferred embodiment, the extrusion assembly further comprises a connecting piece, wherein the connecting piece is fixedly connected to the top of the hydraulic cylinder, and a side of the connecting piece away from the hydraulic cylinder is connected to a piston.

[0009] Adopting the above technical solution: by setting an extrusion component, the internal mold is extruded.

[0010] As a preferred embodiment, a cover plate is provided on the side of the bottom of the mold box close to the piston, a holder is provided on the side of the mold box close to the cover plate, a card block is clamped on the holder, and the side of the card block away from the holder is clamped to the bottom of the cover plate.

[0011] The above technical solution is adopted: by arranging the clamping block and the clamping seat, the cover plate can be easily disassembled and the extrusion work can be facilitated.

[0012] As a preferred embodiment, a fixing assembly is provided on the mold box, and the fixing assembly includes a fixing part, a support leg is fixedly connected to the bottom of the fixing part, a connecting rod is connected to the side of the support leg close to the bottom plate, and the side of the connecting rod away from the support leg is fixed to the bottom plate.

[0013] The above technical solution is adopted: by setting a fixed component, the mold box and the detection component are fixed and limited.

[0014] As a preferred embodiment, an air inlet is provided on one side of the mold box close to the pressure regulating assembly, a rotating shaft is rotatably connected to the side of the mold box close to the air inlet, and a round cover is rotatably connected to the bottom of the rotating shaft.

[0015] The above technical solution is adopted: by setting an air inlet, it is convenient to inject and extract air into the interior, and it is convenient to adjust the internal pressure.

[0016] As a preferred embodiment, a limiting assembly is provided on a side of the support leg close to the vacuum pump, the limiting assembly includes a fixing seat, a sleeve is provided on the fixing seat, and the vacuum pump is fixed in the sleeve.

[0017] The above technical solution is adopted: the vacuum pump is limited and fixed by setting a limit component.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are:

[0019] 1. In the utility model, a detection component is provided to detect the air pressure inside the mold box during the extrusion process. When the air pressure is too low, the vacuum pump is turned on to inject air into the interior, otherwise the interior is evacuated to ensure internal pressure balance and prevent the mold from being worn during extrusion. This solves the problem that in the above-mentioned device, no pressure balance structure is provided during the extrusion process. Due to the uneven internal air pressure, the extrusion mold is more likely to be damaged due to uneven wear, which increases the frequency and cost of mold maintenance and replacement. By providing an extrusion component, the internal mold is extruded.

[0020] 2. In the present invention, by providing a card block and a card seat, the cover plate can be disassembled conveniently, and the extrusion work can be facilitated. By providing a fixing component, the mold box and the detection component can be fixed and limited. By providing an air inlet, it is convenient to inject and exhaust air inside and adjust the internal pressure. By providing a limiting component, the vacuum pump can be limited and fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of an internal pressure balancing device for a plastic extrusion mold.

[0022] Figure 2 This is a bottom structural diagram of an internal pressure balancing device for a plastic extrusion die.

[0023] Figure 3 This is a structural diagram of the detection components in an internal pressure balancing device for a plastic extrusion die.

[0024] Figure 4 This is a disassembled diagram of an internal pressure balancing device for a plastic extrusion die.

[0025] Numbers in the figure:

[0026] 1. Mold box;

[0027] 2. Pressure regulating assembly; 21. Conduit; 22. Vacuum pump;

[0028] 3. Limiting assembly; 31. Fixing seat; 32. Sleeve;

[0029] 4. Bottom plate;

[0030] 5. Extrusion assembly; 51. Hydraulic cylinder; 52. Connector; 53. Piston;

[0031] 6. Detection assembly; 61. Spring; 62. Pick; 63. First fixing rod; 64. Second fixing rod; 65. Extension rod; 66. Button; 67. Alarm;

[0032] 7. Fixing assembly; 71. Fixing piece; 72. Support leg; 73. Connecting rod;

[0033] 8. Cover plate; 9. Clamp block; 10. Socket; 11. Air inlet; 12. Rotating shaft; 13. Round cover. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] like Figures 1-4As shown, an internal pressure balancing device for a plastic extrusion mold includes a mold box 1, a bottom plate 4 is provided at the bottom of the mold box 1, an extrusion assembly 5 is provided on the top of the bottom plate 4, the extrusion assembly 5 includes a hydraulic cylinder 51, a detection assembly 6 is provided on the hydraulic cylinder 51, the detection assembly 6 includes a spring 61, a paddle 62 is provided on the side of the hydraulic cylinder 51 away from the spring 61, a first fixed rod 63 is provided on both sides of the top of the bottom plate 4 close to the hydraulic cylinder 51, a second fixed rod 64 is slidably connected to the first fixed rod 63, and the two second fixed rods 64 are respectively provided with a spring 61 and a paddle 62, an extension rod 65 is provided on the hydraulic cylinder 51 and the second fixed rod 64, a button 66 is provided at the bottom of the extension rod 65, an alarm 67 is provided on the mold box 1, a pressure regulating assembly 2 is provided on the mold box 1, the pressure regulating assembly 2 includes a conduit 21, a vacuum pump 22 is fixedly connected to the conduit 21, and the extrusion assembly 5 also includes a connecting member 52, which is fixedly connected to the top of the hydraulic cylinder 51. The side of the connecting member 52 away from the hydraulic cylinder 51 is connected to a piston 53. By setting the extrusion component 5, the hydraulic cylinder 51 is turned on to drive the top piston 53 to perform piston movement inside the mold box 1 to extrude the formed mold. During the extrusion process, the detection component 6 is set. When the internal pressure is too high, the paddle 62 touches the spring 61, and the rebound amplitude of the spring 61 will be reduced, so that it cannot touch the button 66, and the alarm 67 will not sound, thereby starting the vacuum pump 22 to inject air into the mold box 1. When the internal pressure is too low, the spring 61 on the other side touches the paddle 62. Due to the excessive speed, the spring 61 has an excessive amplitude and touches the button 66 on the hydraulic cylinder 51, thereby sounding an alarm. At this time, the vacuum pump 22 is turned on to evacuate the interior to ensure internal pressure balance.

[0036] Furthermore, if Figure 2 As shown: a cover plate 8 is provided on the side of the bottom of the mold box 1 close to the piston 53, a clamping seat 10 is provided on the side of the mold box 1 close to the cover plate 8, a clamping block 9 is clamped on the clamping seat 10, and the side of the clamping block 9 away from the clamping seat 10 is clamped on the bottom of the cover plate 8. The provision of the clamping block 9 and the clamping seat 10 facilitates the disassembly of the cover plate 8 and facilitates the extrusion work;

[0037] In the above solution, the mold box 1 and the detection component 6 should be fixedly supported. Figure 1 As shown: a fixing assembly 7 is provided on the mold box 1, and the fixing assembly 7 includes a fixing member 71. A supporting leg 72 is fixedly connected to the bottom of the fixing member 71. A connecting rod 73 is connected to the side of the supporting leg 72 close to the bottom plate 4. The side of the connecting rod 73 away from the supporting leg 72 is fixed to the bottom plate 4. By providing the fixing assembly 7, the mold box 1 and the detection assembly 6 are fixed and limited.

[0038] In the above solution, the vacuum pump 22 should be fixed and limited, such as Figure 1As shown: a limiting assembly 3 is provided on one side of the support leg 72 close to the vacuum pump 22. The limiting assembly 3 includes a fixing seat 31. A sleeve 32 is provided on the fixing seat 31. The vacuum pump 22 is fixed in the sleeve 32. By providing the limiting assembly 3, the vacuum pump 22 is limited and fixed.

[0039] Furthermore, if Figure 1 As shown: an air inlet 11 is provided on one side of the mold box 1 near the pressure regulating component 2, a rotating shaft 12 is rotatably connected to the side of the mold box 1 near the air inlet 11, and a round cover 13 is rotatably connected to the bottom of the rotating shaft 12. By setting the air inlet 11, it is convenient to inject and extract air into the interior, and it is convenient to adjust the internal pressure.

[0040] Working principle: Figure 1 - Figure 4 As shown, by setting the extrusion component 5, the hydraulic cylinder 51 is turned on to drive the top piston 53 to perform piston movement inside the mold box 1 to extrude the formed mold. During the extrusion process, the detection component 6 is set. When the internal pressure is too high, the paddle 62 touches the spring 61, and the spring 61's rebound amplitude will be reduced, so that it cannot touch the button 66, and the alarm 67 will not sound, thereby turning on the vacuum pump 22 to inject air into the mold box 1. When the internal pressure is too low, the spring 61 on the other side touches the paddle 62, and the alarm 67 will not sound. If the pressure is too high, the amplitude of the shrapnel 61 will be too large and it will touch the button 66 on the hydraulic cylinder 51, thereby sounding an alarm. At this time, the vacuum pump 22 is turned on to evacuate the interior to ensure the internal pressure balance. By setting the block 9 and the base 10, it is convenient to disassemble the cover 8 and facilitate the extrusion work. By setting the fixing component 7, the mold box 1 and the detection component 6 are fixed and limited. By setting the limit component 3, the vacuum pump 22 is limited and fixed. By setting the air inlet 11, it is convenient to inject and evacuate the interior and adjust the internal pressure.

[0041] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments with equivalent changes using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. An internal pressure balancing device for a plastic extrusion die, comprising a die box (1), characterized in that: The bottom of the mold box (1) is provided with a bottom plate (4), the top of the bottom plate (4) is provided with an extrusion assembly (5), the extrusion assembly (5) includes a hydraulic cylinder (51), the hydraulic cylinder (51) is provided with a detection assembly (6), the detection assembly (6) includes a spring (61), a paddle (62) is provided on the side of the hydraulic cylinder (51) away from the spring (61), the top of the bottom plate (4) is provided with a first fixing rod (63) on both sides close to the hydraulic cylinder (51), and the first fixing rod (63) is slidably connected to the first fixing rod (63). Two fixed rods (64), each of the two second fixed rods (64) is provided with a spring piece (61) and a paddle (62), the hydraulic cylinder (51) and the second fixed rod (64) are both provided with an extension rod (65), the bottom of the extension rod (65) is provided with a button (66), the mold box (1) is provided with an alarm (67), the mold box (1) is provided with a pressure regulating assembly (2), the pressure regulating assembly (2) includes a conduit (21), and the conduit (21) is fixedly connected to a vacuum pump (22).

2. The internal pressure balancing device for a plastic extrusion die according to claim 1, characterized in that: The extrusion assembly (5) further comprises a connecting piece (52), wherein the connecting piece (52) is fixedly connected to the top of the hydraulic cylinder (51), and a piston (53) is connected to the side of the connecting piece (52) away from the hydraulic cylinder (51).

3. The internal pressure balancing device for a plastic extrusion die according to claim 2, characterized in that: A cover plate (8) is provided on the side of the bottom of the mold box (1) close to the piston (53), a clamping seat (10) is provided on the side of the mold box (1) close to the cover plate (8), a clamping block (9) is clamped on the clamping seat (10), and a side of the clamping block (9) away from the clamping seat (10) is clamped on the bottom of the cover plate (8).

4. The internal pressure balancing device for a plastic extrusion die according to claim 1, characterized in that: The mold box (1) is provided with a fixing assembly (7), the fixing assembly (7) comprising a fixing member (71), the bottom of the fixing member (71) being fixedly connected to a supporting leg (72), a side of the supporting leg (72) close to the bottom plate (4) being connected to a connecting rod (73), and a side of the connecting rod (73) away from the supporting leg (72) being fixed to the bottom plate (4).

5. The internal pressure balancing device for a plastic extrusion die according to claim 1, characterized in that: An air inlet (11) is provided on one side of the mold box (1) close to the pressure regulating assembly (2); a rotating shaft (12) is rotatably connected to the side of the mold box (1) close to the air inlet (11); and a round cover (13) is rotatably connected to the bottom of the rotating shaft (12).

6. The internal pressure balancing device for a plastic extrusion die according to claim 4, characterized in that: A limiting assembly (3) is provided on a side of the support leg (72) close to the vacuum pump (22), the limiting assembly (3) comprising a fixing seat (31), a sleeve (32) being provided on the fixing seat (31), and the vacuum pump (22) being fixed in the sleeve (32).

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