Membrane high-stretching plastic uptake mold and plastic uptake method thereof

Abstract

The invention discloses a high-stretching plastic uptake mold for a membrane and a plastic uptake method of the high-stretching plastic uptake mold. The high-stretching plastic suction mold comprises an upper fixing plate, an overturning plate, a mold core plate and a lower fixing plate which are sequentially arranged from top to bottom, the turnover plate is hinged to the rear end of the mold core plate; the mold core plate comprises a base plate and a mold core seat, the mold core seat is mounted in the center of the base plate, a fixed positioning pin for fixing a membrane is mounted at the position, located on the periphery of the mold core seat, of the base plate, a membrane sliding block sliding front and back is mounted at the front end of the mold core plate, and a movable positioning pin for fixing the membrane is mounted on the membrane sliding block; an inclined guide column is installed on the upper fixing plate and connected with the diaphragm sliding block in a sliding mode, and an avoiding notch used for avoiding the inclined guide column is formed in the overturning plate. An upper fixing pressing block is mounted on the upper fixing plate; the center of the mold core seat is elastically and slidably connected with a lower elastic pressing block; and a gap through which the diaphragm passes is formed between the upper fixed pressing block and the lower elastic pressing block. According to the invention, the plastic uptake forming of the overlarge flanging height of the membrane is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and specifically to a thermoforming mold and a thermoforming method thereof. Background Art

[0002] In the case where the flanging height of the diaphragm is greater than 20 mm, during thermoforming, the diaphragm is prone to breakage during stretching, and the wall thickness at the tail end of the diaphragm is too thin, making it difficult to ensure the uniformity of the overall thickness of the diaphragm.

[0003] Currently, there is a lack of a thermoforming mold and a thermoforming method that can solve the problem of the excessive flanging height of the diaphragm affecting the quality of thermoforming. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the present invention provides a high-stretch thermoforming mold for diaphragms and a thermoforming method thereof to solve at least one of the above technical problems.

[0005] To achieve the above object, the present invention provides a high-stretch thermoforming mold for diaphragms, which is characterized in that it includes an upper fixing plate, a flipping plate, a core plate, and a lower fixing plate arranged in sequence from top to bottom;

[0006] The flipping plate is hinged to the rear end of the core plate;

[0007] The core plate includes a base plate and a core seat. The core seat is installed in the center of the base plate, and fixing positioning pins for fixing the diaphragm are installed around the core seat on the base plate;

[0008] A diaphragm slider that slides back and forth is installed at the front end of the core plate, and movable positioning pins for fixing the diaphragm are installed on the diaphragm slider;

[0009] An inclined guide post is installed on the upper fixing plate, and the inclined guide post is slidably connected to the diaphragm slider. An avoidance notch for avoiding the inclined guide post is provided on the flipping plate;

[0010] An upper fixing pressure block is installed on the upper fixing plate;

[0011] A lower elastic pressure block is elastically and slidably connected to the center of the core seat, and there is a gap through which the diaphragm passes between the upper fixing pressure block and the lower elastic pressure block;

[0012] When the upper fixing plate moves downward to close, the inclined guide post drives the diaphragm slider to move toward the side adjacent to the core seat.

[0013] The present invention realizes the thermoforming of a diaphragm with an excessive flanging height through the combination of pushing the diaphragm toward the core seat, the upper fixing pressure block, and the lower elastic pressure block.

[0014] Further preferably, the area where the diaphragm slider pushes the diaphragm is opposite to the position where the flanging height of the formed diaphragm is greater than 20 mm.

[0015] Further preferably, a vertically arranged shear line is provided on the diaphragm, and the diaphragm is separated into a fixed area and a pushable bending area through the shear line;

[0016] The edge of the pushable bending area is positioned through the movable positioning pin;

[0017] The edge of the fixed area is positioned through the fixed positioning pin.

[0018] Further preferably, the pushable bending area is at least 5 mm outwardly extended on both the left and right sides of the area where the flanging height of the formed diaphragm is greater than 20 mm.

[0019] Further preferably, the formed area of the diaphragm includes a left rising slope area and a right high flanging area;

[0020] The length in the left - right direction from the right high flanging area to the rightmost side of the diaphragm is A;

[0021] The pushable bending area is the distance from the shear line to the right end of the diaphragm, and the length of the pushable bending area in the left - right direction is at least A + 5.

[0022] Further preferably, the shear line is located outside the area where the lower elastic pressing block and the upper fixed pressing block are located.

[0023] Further preferably, a raised forming area is provided on the mold core seat, and the diaphragm slider is on the side of the lower elastic pressing block and the lower fixed pressing block away from the raised forming area.

[0024] Further preferably, the elastic force direction of the lower elastic pressing block is upwardly inclined towards the side away from the raised forming area.

[0025] Further preferably, a spring is clamped between the lower elastic pressing block and the mold core seat.

[0026] A thermoforming method for a high - stretch thermoforming mold of a diaphragm, characterized by comprising the following steps:

[0027] Step 1, open the upper fixing plate, flip - open the flipping plate, and place the diaphragm;

[0028] Step 2, flip - close the flipping plate, the upper fixing plate moves downward, and the inclined guide post drives the diaphragm slider to move towards the side adjacent to the mold core seat;

[0029] Step 3, perform the thermoforming process. The material of the diaphragm is ABS, the softening temperature of the diaphragm is set to 140 °C, and the forming time is set to 50 s.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] Through the pushing of the diaphragm towards the mold core seat and the combination of the upper fixed pressing block and the lower elastic pressing block, the present invention realizes the thermoforming of the diaphragm with an excessive flanging height. After the use of this device, the product has a good thickness uniformity of the diaphragm, without the problem of being too thin, and less than 0.4 mm. After forming with a 0.5-mm diaphragm using this device, the thickness is in the range of 0.4 - 0.45 mm, meeting the product requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic diagram of a partial structure of Specific Embodiment 1 of the present invention;

[0033] Figure 2 is a schematic diagram of a partial structure of Specific Embodiment 1 of the present invention;

[0034] Figure 3 is a schematic diagram of a partial structure of Specific Embodiment 1 of the present invention;

[0035] Figure 4 is a schematic diagram of the structure of the diaphragm slider of Specific Embodiment 1 of the present invention;

[0036] Figure 5 is a schematic diagram of a partial structure of Specific Embodiment 1 of the present invention;

[0037] Figure 6 is a partial cross-sectional view of Specific Embodiment 1 of the present invention;

[0038] Figure 7 is a partial cross-sectional view of Specific Embodiment 1 of the present invention;

[0039] Figure 8 is a schematic diagram of the structure of the diaphragm slider in cooperation with the diaphragm of Specific Embodiment 1 of the present invention;

[0040] Figure 9 is a schematic diagram of the structure of the diaphragm slider in cooperation with the diaphragm of Specific Embodiment 1 of the present invention;

[0041] Figure 10 is a schematic diagram of the structure of the diaphragm after being cut after thermoforming in Specific Embodiment 1 of the present invention.

[0042] In the figure: 1 is the upper fixing plate, 2 is the turning plate, 3 is the mold core plate, 4 is the lower fixing plate, 5 is the inclined guide post, 6 is the upper fixed pressing block, 7 is the lower elastic pressing block, 8 is the diaphragm slider, 9 is the diaphragm, 31 is the fixed positioning pin, 32 is the mold core seat, 81 is the movable positioning pin, and 91 is the shearing line. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0043] The present invention will be further described below in conjunction with the accompanying drawings.

[0044] See Figures 1 to 10 , Specific Embodiment 1: A high-stretch thermoforming mold for diaphragm, comprising an upper fixing plate 1, a flipping plate 2, a mold core plate 3, and a lower fixing plate 4 arranged in sequence from top to bottom; the rear end of the flipping plate 2 is hinged to the mold core plate 3; the mold core plate 3 includes a substrate and a mold core seat, a mold core seat 32 is installed in the center of the substrate, and fixing positioning pins 31 for fixing the diaphragm 9 are installed around the substrate at the periphery of the mold core seat 32; a diaphragm slider 8 that slides back and forth is installed at the front end of the mold core plate 3, and a movable positioning pin 81 for fixing the diaphragm 9 is installed on the diaphragm slider 8; an inclined guide post 5 is installed on the upper fixing plate 1, the inclined guide post 5 is slidably connected to the diaphragm slider 8, and an avoidance notch for avoiding the inclined guide post 5 is opened on the flipping plate 2; an upper fixing pressure block 6 is installed on the upper fixing plate 1; a lower elastic pressure block 7 is elastically and slidably connected to the center of the mold core seat, and there is a gap through which the diaphragm 9 passes between the upper fixing pressure block 6 and the lower elastic pressure block 7; when the upper fixing plate 1 moves downward to close, the inclined guide post 5 drives the diaphragm slider 8 to move towards the side adjacent to the mold core seat.

[0045] Through the pushing of the diaphragm 9 towards the mold core seat and the combination of the upper fixing pressure block 6 and the lower elastic pressure block 7, the present invention realizes the thermoforming of the diaphragm 9 with an excessive flanging height.

[0046] An avoidance circular hole for avoiding the fixing positioning pin 31 is opened on the flipping plate 2. A handle is installed on the front side of the flipping plate 2. The flipping plate 2 presses the outer edge of the diaphragm.

[0047] The area where the diaphragm slider pushes the diaphragm 9 is opposite to the position where the flanging height of the formed diaphragm 9 is greater than 20 mm.

[0048] A vertical shear line 91 is opened on the diaphragm 9, and the diaphragm 9 is divided into a fixed area and a pushable and bendable area through the shear line 91; the edge of the pushable and bendable area is positioned by the movable positioning pin 81; the edge of the fixed area is positioned by the fixing positioning pin 31.

[0049] The pushable and bendable area is at least 5 mm outwardly extended on both sides of the area where the flanging height of the formed diaphragm 9 is greater than 20 mm.

[0050] The formed area of the diaphragm 9 includes a left rising slope area and a right high-flange area; the length in the left-right direction from the right high-flange area to the rightmost side of the diaphragm 9 is A; the pushable and bendable area is the distance from the shear line 91 to the right end of the diaphragm 9, and the length in the left-right direction of the pushable and bendable area is at least A + 5.

[0051] High stretch refers to the case where the flanging height of the diaphragm is greater than 20 mm. That is, the height of the right high-flange area is greater than 20 mm. And preferably, it is less than 30 mm.

[0052] The shearing line 91 is located outside the area where the lower elastic pressing block and the upper fixed pressing block 6 are located.

[0053] A raised forming area is provided on the mold core seat, and the diaphragm slider is on the side of the lower elastic pressing block and the lower fixed pressing block away from the raised forming area. The elastic force direction of the lower elastic pressing block 7 is upwardly inclined towards the side away from the raised forming area.

[0054] A spring is clamped between the lower elastic pressing block 7 and the mold core seat.

[0055] The inclined guide pillar is arranged obliquely backward from top to bottom. The sliding distance of the diaphragm slider in the front-rear direction is 25 mm.

[0056]

[0057] Adopting the structure of the present invention saves the product size of the diaphragm.

[0058] A thermoforming method for a high-stretch thermoforming mold of a diaphragm, characterized by comprising the following steps:

[0059] Step 1, open the upper fixing plate 1, turn over and open the turning plate 2, and place the diaphragm 9;

[0060] Step 2, turn over and close the turning plate 2, the upper fixing plate 1 moves downward, and the inclined guide pillar 5 drives the diaphragm slider to move towards the side adjacent to the mold core seat;

[0061] Step 3, perform the thermoforming process. The material of the diaphragm 9 is ABS, the softening temperature of the diaphragm 9 is set to 140 °C, and the forming time is set to 50 s.

[0062] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A membrane high-stretching blister mold, characterized in that: It includes an upper fixing plate, a turning plate, a mold plate and a lower fixing plate which are arranged in sequence from top to bottom; The flip plate is hinged to the rear end of the mold plate; The mold plate includes a base plate and a mold seat, the mold seat is installed in the center of the base plate, and the base plate is provided with a fixing positioning pin for fixing the diaphragm at the periphery of the mold seat; A diaphragm slider that slides forward and backward is installed at the front end of the mold core plate, and a movable positioning pin for fixing the diaphragm is installed on the diaphragm slider; An inclined guide column is installed on the upper fixed plate, and the inclined guide column is slidably connected with the diaphragm slider, and an avoidance notch for avoiding the inclined guide column is opened on the flip plate; An upper fixed pressing block is installed on the upper fixed plate; The center of the mold core seat is elastically slidably connected with a lower elastic pressing block, and there is a gap between the upper fixed pressing block and the lower elastic pressing block for the diaphragm to pass through; When the upper fixed plate moves from top to bottom to close, the inclined guide column drives the diaphragm slider to move toward the side adjacent to the mold core seat.

2. A membrane high-stretching blister mold according to claim 1, characterized in that: The area where the diaphragm slider pushes the diaphragm is directly opposite to the position where the height of the flange of the diaphragm after molding is greater than 20 mm.

3. A membrane high-stretching blister mold according to claim 1, characterized in that: The diaphragm is provided with a vertically arranged shear line, and the diaphragm is divided into a fixed area and a pushable bending area by the shear line; The pushable bending area has an edge positioned by the movable positioning pin; The fixing area is positioned at the edge by the fixing positioning pins.

4. A membrane high-stretching blister mold according to claim 3, characterized in that: The pushable bending area is an area where the flange height of the diaphragm after molding is greater than 20 mm and the left and right sides expand at least 5 mm.

5. The high-stretching blister mold for a membrane according to claim 3, characterized in that: The area after the diaphragm is formed includes a left rising slope area and a right high flange area; The length from the right high flange area to the rightmost side of the diaphragm in the left-right direction is A; The pushable bending area is the distance from the shear line to the right end of the diaphragm, and the length of the pushable bending area in the left-right direction is at least A+5.

6. A membrane high-stretching blister mold according to claim 5, characterized in that: The shear line is located outside the area where the lower elastic pressing block and the upper fixed pressing block are located.

7. A membrane high-stretching blister mold according to claim 6, characterized in that: The mold core seat is provided with a raised forming area, and the diaphragm slider is located on a side of the lower elastic pressing block and the lower fixed pressing block away from the raised forming area.

8. A membrane high-stretching blister mold according to claim 7, characterized in that: The elastic force direction of the lower elastic pressing block is inclined upward toward the side away from the raised forming area.

9. The high-stretch film blister mold according to claim 1, characterized in that: A spring is sandwiched between the lower elastic pressing block and the mold core seat.

10. The blister forming method of a membrane high-stretching blister forming mold according to claim 1, characterized in that: The steps include: Step 1: open the upper fixed plate, flip open the flip plate, and place the diaphragm; Step 2, flip and close the flip plate, the upper fixed plate moves downward, and the inclined guide column drives the diaphragm slider to move toward the side adjacent to the mold core seat; Step three, perform the vacuum forming process, the diaphragm material is ABS, the diaphragm softening temperature is set to 140°C, and the forming time is set to 50s.

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