Dustproof device for movable structure of thermal forming die

Abstract

The utility model discloses a dustproof device for a movable structure of a thermal forming die, which relates to the field of dies and comprises a lower die, an ejector pin cavity is arranged on the lower die, a tension spring is arranged at the center of the top of the ejector pin cavity, an ejector pin is slidably mounted in the ejector pin cavity, and the bottom of the ejector pin is fixedly connected with the upper end of the tension spring. Air enters the ejector pin cavity to form air pressure, the ejector pin is ejected upwards through the air pressure, then a finished product can be ejected out, stress concentration can be avoided by ejecting the finished product through the air pressure, the reject ratio of the finished product can be reduced, the filter screen can filter air adsorbed by the air pump, and therefore the finished product can be conveniently ejected out. Dust can be prevented from entering the lower section of the interior of the ejector pin cavity through the air pump, the dust can be prevented from affecting movement of the ejector pin, air generated by the air pump is blown to the periphery above through the air outlet groove, the dust can be prevented from falling into the ejector pin cavity from the upper portion and affecting vertical movement of the ejector pin, and then smooth ejection of finished products can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of molds, in particular to a dustproof device for a movable structure of a thermoforming mold. Background Art

[0002] Hot press forming primarily involves heating a mold, injecting a sample, and securing the mold to a heating plate with pressure. The melting temperature and time of the sample are controlled to achieve hardening and cooling after melting, before the finished mold is removed. Conventional hot press forming molds allow dust to easily enter the ejector pin cavity during the ejection process, hindering the vertical movement of the ejector pins and, consequently, the ejection of the finished product. Therefore, a dust-proof device for the movable structure of hot press forming molds is necessary to address this issue. Utility Model Content

[0003] The purpose of the utility model is to provide a dust-proof device for a movable structure of a thermoforming mold, so as to solve the problem in the prior art that dust easily enters the ejector cavity when the thermoforming mold takes out the finished product, affecting the up and down movement of the ejector and further affecting the ejection of the finished product.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solution: a dustproof device for a movable structure of a thermoforming mold, comprising a lower mold, an ejector cavity being defined on the lower mold, a tension spring being provided at the top center position of the ejector cavity, an ejector being slidably mounted in the ejector cavity, the bottom of the ejector being fixedly connected to the upper end of the tension spring, a placement groove being defined on one side of the ejector cavity, an air pump being provided on the bottom inner wall of the placement groove, and an air pipe being provided between the air pump and the ejector cavity;

[0005] The top end of the ejector pin is sleeved with a sealing ring, which is arranged inside the ejector pin cavity. A plurality of air outlet grooves are opened around the ejector pin, and the top ends of the air outlet grooves are flush with the lower surface of the sealing ring.

[0006] Preferably, the plurality of air outlet grooves are evenly distributed around the ejector pin, and the top ends of the air outlet grooves are arranged in an arc shape.

[0007] Preferably, a through hole is opened on the inner wall of the ejector cavity near the bottom, a sealing sleeve is inserted into the through hole, and the sealing sleeve is arranged on the outside of the trachea.

[0008] Preferably, an air intake window is provided on one side of the placement slot, and a filter is provided in the air intake window.

[0009] Preferably, the sealing ring includes a heat insulating layer and a sealing layer, the sealing layer is located below the heat insulating layer, and the upper surface of the heat insulating layer is flush with the upper surface of the ejector pin.

[0010] The technical effects and advantages of this utility model are:

[0011] 1. Start the air pump. The gas enters the ejector cavity through the air pipe and forms air pressure. The air pressure pushes the ejector upward, thereby ejecting the finished product. Ejecting the finished product by air pressure can avoid stress concentration, better eject the finished product, and reduce the defective rate of the finished product.

[0012] 2. During operation, the filter can filter the air adsorbed by the air pump, preventing dust from entering the lower section of the ejector cavity through the air pump, thereby preventing dust from affecting the movement of the ejector.

[0013] 3. When the part of the ejector sleeve inside the sealing ring is completely ejected, the gas generated by the air pump blows upward and around through the air outlet groove. This can prevent dust from falling into the ejector cavity from above and affecting the up and down movement of the ejector, thereby ensuring the smooth ejection of the finished product. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the dust-proof device of the movable structure of the thermoforming mold of the utility model.

[0015] Figure 2 This is a cross-sectional view of the dust-proof device of the movable structure of the thermoforming mold of the utility model.

[0016] Figure 3 For this utility model Figure 2 A magnified schematic diagram of the structure at center A.

[0017] In the figure: 1. Lower mold; 2. Ejector cavity; 3. Tension spring; 4. Ejector; 5. Placement groove; 6. Air pump; 7. Air pipe; 8. Air outlet groove; 9. Sealing ring; 10. Filter. DETAILED DESCRIPTION

[0018] 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.

[0019] The utility model provides Figure 1-Figure 3 The dust-proof device of the movable structure of a thermoforming mold shown includes a lower mold 1, an upper mold is arranged above the lower mold 1, and the upper mold is provided with a heating mechanism. This type of setting is a conventional setting and is not limited thereto.

[0020] In order to solve the problem in the prior art that dust easily enters the ejector cavity when the hot forming mold is taken out of the finished product, affecting the up and down movement of the ejector and thus affecting the ejection of the finished product, the utility model is provided with an ejector cavity 2 on the lower mold 1, and a tension spring 3 is provided at the top center position of the ejector cavity 2. An ejector 4 is slidably installed in the ejector cavity 2, and the bottom of the ejector 4 is fixedly connected to the upper end of the tension spring 3. A placement groove 5 is provided on one side of the ejector cavity 2, and an air pump 6 is provided on the inner wall of the bottom of the placement groove 5. An air pipe 7 is provided between the air pump 6 and the ejector cavity 2. During operation, the raw material is injected into the lower mold 1, and the upper mold presses down to heat the raw material and extrude the finished product. After the finished product is cooled, the air pump 6 is started, and the gas enters the ejector cavity 2 through the air pipe 7 and forms air pressure. The air pressure pushes the ejector 4 upward, thereby ejecting the finished product. Ejecting the finished product by air pressure can avoid stress concentration, better eject the finished product, and reduce the unqualified rate of the finished product.

[0021] Furthermore, a sealing ring 9 is provided on the top end of the ejector pin 4, and the sealing ring 9 is provided inside the ejector pin cavity 2. A plurality of air outlet grooves 8 are provided around the ejector pin 4, and the top end of the air outlet groove 8 is flush with the lower surface of the sealing ring 9. During operation, when the ejector pin 4 ejects the finished product, the sealing ring 9 can prevent air leakage, ensure sufficient air pressure, and eject the finished product well. When the part of the ejector pin 4 sleeved in the sealing ring 9 is completely ejected, the gas generated by the air pump 6 is blown upward and around through the air outlet groove 8, thereby preventing dust from falling into the ejector pin cavity 2 from above and affecting the up and down movement of the ejector pin 4, thereby ensuring the smooth ejection of the finished product.

[0022] Furthermore, the utility model is provided with an air intake window on one side of the placement groove 5, and a filter 10 is provided in the air intake window. When working, the filter 10 can filter the air adsorbed by the air pump 6, thereby preventing dust from entering the lower section of the ejector cavity 2 through the air pump 6, and preventing dust from affecting the movement of the ejector 4.

[0023] Multiple air outlet grooves 8 are evenly distributed around the ejector pin 4, and the top of the air outlet groove 8 is set in an arc shape. The top of the air outlet groove 8 is set in an arc shape, which can prevent the air flow from blowing back when it blows to the top of the air outlet groove 8, causing dust to enter the ejector pin cavity 2.

[0024] A through hole is opened near the bottom of the inner wall of the ejector cavity 2, and a sealing sleeve is inserted into the through hole. The sealing sleeve is arranged on the outside of the trachea 7. The sealing sleeve can increase the sealing performance between the trachea 7 and the ejector cavity 2. This setting is a conventional setting and will not be elaborated on.

[0025] The sealing ring 9 includes a heat-insulating layer and a sealing layer. The sealing layer is located below the heat-insulating layer. The upper surface of the heat-insulating layer is flush with the upper surface of the ejector pin 4. The heat-insulating layer can well protect the sealing layer of the sealing ring 9 and can avoid damage to the sealing ring 9 during thermoforming.

[0026] It should be noted that the sealing ring 9 can also be integrally formed using high-temperature resistant materials. This setting is a conventional setting and is not limited thereto.

Claims

1. A dust-proof device for a thermoforming mold movable structure, comprising a lower mold (1), characterized in that: The lower mold (1) is provided with an ejector cavity (2), a tension spring (3) is provided at the top center position of the ejector cavity (2), an ejector (4) is slidably installed in the ejector cavity (2), the bottom of the ejector (4) is fixedly connected to the upper end of the tension spring (3), a placement groove (5) is provided on one side of the ejector cavity (2), an air pump (6) is provided on the inner wall of the bottom of the placement groove (5), and an air pipe (7) is provided between the air pump (6) and the ejector cavity (2); The top end of the ejector pin (4) is sleeved with a sealing ring (9), which is arranged inside the ejector pin cavity (2). A plurality of air outlet grooves (8) are provided around the ejector pin (4), and the top ends of the air outlet grooves (8) are flush with the lower surface of the sealing ring (9).

2. The dust-proof device for the movable structure of a thermoforming mold according to claim 1, characterized in that: The plurality of air outlet grooves (8) are evenly distributed around the ejector pin (4), and the top ends of the air outlet grooves (8) are arranged in an arc shape.

3. The dust-proof device for the movable structure of a thermoforming mold according to claim 1, characterized in that: A through hole is provided on the inner wall of the ejector cavity (2) near the bottom, a sealing sleeve is inserted into the through hole, and the sealing sleeve is sleeved on the outside of the air pipe (7).

4. The dust-proof device for the movable structure of a thermoforming mold according to claim 1, characterized in that: An air intake window is provided on one side of the placement groove (5), and a filter screen (10) is provided in the air intake window.

5. The dust-proof device for the movable structure of a thermoforming mold according to claim 1, characterized in that: The sealing ring (9) comprises a heat insulating layer and a sealing layer, wherein the sealing layer is located below the heat insulating layer, and the upper surface of the heat insulating layer is flush with the upper surface of the ejector pin (4).

Images