A mold demolding device for vacuum forming processing

Abstract

The utility model relates to the technical field of plastic blister processing, specifically relates to a mould stripping device for vacuum plastic processing, including demoulding platform, and setting up sucking disc at the bottom of demoulding platform, and the plastic product after cooling is sucked and lifted through the sucking disc adsorption mode, realizes the demoulding of plastic product and takes out, has facilitated the operation of construction personnel, and the sucking disc air suction adsorption is realized through the lifting pipe. The top of lifting pipe is provided with a sealing element, and the upper end of the lifting pipe is blocked by the sealing element, so that the gas transmission in the air pressure cavity can drive the lifting pipe to descend with the sucking disc. After the sucking disc is pressed onto the plastic product, the air suction in the air pressure cavity can make the sealing element slide automatically, and then the lifting pipe is opened and conducted. Therefore, the air suction in the air pressure cavity also makes the sucking disc suck the plastic product, and finally the lifting pipe rises with the sucking disc and the plastic product, and the whole process only needs to control the gas transmission and air suction in the air pressure cavity, without external operation, simple and convenient.

Description

Technical Field

[0001] This utility model relates to the field of plastic thermoforming technology, and in particular to a mold release device for vacuum thermoforming. Background Technology

[0002] Vacuum forming is a thermoplastic molding technology that softens plastic sheets by heating them, then uses vacuum negative or positive pressure gas differences to conform the material to the mold contours. After cooling and solidification, the desired shape is achieved. Mold types include male and female molds. A male mold encloses the material in a convex mold and is suitable for deep-walled, thick-walled products, while a female mold embeds the material into a concave mold, resulting in clearer surface details. After vacuum forming, the product needs to be removed from the mold surface by external force or air pressure difference. The demolding process must avoid deformation or damage, relying heavily on effective cooling and solidification, as well as optimized mold design.

[0003] Common demolding methods include air-pressure blow-out and mechanical ejection. Among these, vacuum forming with female molds is often used for thin-walled plastic products, resulting in more delicate surface details after molding. If the product is not fully cooled, mechanical ejection can easily damage the surface. Furthermore, if the inner groove of the female mold is deep, it is difficult to process it using air-pressure blow-out.

[0004] Currently, suction cups are used for demolding, and this method is well-suited for demolding plastic products formed by vacuum forming in deep internal grooves. However, suction cups often require complex structures, such as air suction and lifting mechanisms, leading to high costs and inconvenience in use. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a mold release device for vacuum forming, so as to solve the technical problems of existing mold release devices having complex structures, high costs, and being troublesome to use and easy to damage the outer surface of plastic products.

[0006] To achieve the above objectives, this utility model provides a mold demolding device for vacuum forming, comprising a mold for vacuum forming, and the demolding device further comprising:

[0007] A demolding platform is provided above the mold. The bottom of the demolding platform is equipped with a suction cup. A lifting tube is fixedly connected to the upper end of the suction cup. The lifting tube is slidably connected to the demolding platform.

[0008] A vertical cylinder is fixedly connected to the demolding platform. A through air pressure chamber is provided between the vertical cylinder and the demolding platform. The air pressure chamber is connected to an external air source. The lifting pipe is located in the air pressure chamber, and a sealing part is provided at the top of the lifting pipe to block the upper port of the lifting pipe.

[0009] Furthermore, the suction cup is provided in several parts, and corresponding vertical cylinders, lifting tubes and sealing parts are also provided in several parts.

[0010] Furthermore, a sealing gasket is provided at the bottom of the air pressure chamber, and the sealing gasket is sleeved on the outside of the lifting pipe and fixedly connected to the demolding platform.

[0011] Furthermore, the sealing component consists of a frustum and a circular plate. The frustum is fixedly connected to the bottom center of the circular plate, and the maximum diameter of the frustum is the same as the inner diameter of the lifting pipe. The diameter of the circular plate is the same as that of the air pressure chamber, and the circular plate is slidably connected to the inner wall of the air pressure chamber.

[0012] Furthermore, the outer circular plate of the frustum is also provided with a vertically penetrating ventilation hole.

[0013] Furthermore, a base is provided below the mold, and the mold is fixedly connected to the base by a bracket. The demolding platform is also fixedly connected to the base by a bracket.

[0014] Furthermore, the demolding platform, support, and base are provided with a through air supply channel. The air pressure chamber is connected to the air supply channel and is connected to an external air source through the air supply channel. A solenoid valve is also provided in the air supply channel within the demolding platform.

[0015] Furthermore, the bottom of the mold cavity is provided with several air holes for vacuum forming or air blowing demolding. The air holes are connected to an external air source through the air supply channel in the base.

[0016] The beneficial effects of this utility model are as follows: 1. By setting up a demolding platform and installing suction cups at the bottom of the platform, the cooled plastic products can be picked up and lifted by the suction cups, thus demolding and removing the plastic products. This greatly facilitates the operation of construction personnel and improves efficiency. At the same time, the suction cups are made of soft rubber material, so the outer surface of the plastic products will not be damaged when using the suction cups to pick them up.

[0017] 2. The suction cup's suction adsorption is achieved through a lifting tube, and the lifting of the plastic product after the suction cup has adsorbed it is also achieved through the lifting tube. A sealing device is installed at the top of the lifting tube, blocking the upper end. Therefore, air supply to the air pressure chamber drives the lifting tube, carrying the suction cup, downwards. Once the suction cup has adsorbed the plastic product, the lower end of the lifting tube is blocked, so air supply to the air pressure chamber drives the lifting tube, carrying both the suction cup and the plastic product, upwards. No special lifting mechanism is needed, saving costs.

[0018] 3. The sealing component is placed at the upper end of the lifting tube. Therefore, after the suction cup presses onto the plastic product, the air extraction in the air pressure chamber causes the sealing component to slide upward automatically, thereby opening the lifting tube for conduction. The air extraction in the air pressure chamber also causes the suction cup to hold the plastic product, and finally, the lifting tube carries the suction cup and plastic product upward. The entire process only requires controlling the air supply and extraction within the air pressure chamber; no additional operations are needed, making it simple and convenient. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure and principle of the device of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure and principle of the mold in the device of this utility model.

[0022] Figure 3 This is a schematic diagram of the bottom structure of the demolding platform in the device of this utility model.

[0023] Figure 4 This is a schematic diagram of the internal structure of the demolding platform in the device of this utility model.

[0024] Figure 5 for Figure 4 Enlarged view of part A in the middle.

[0025] The diagram is marked as follows:

[0026] 101. Mold, 102. Base, 103. Support, 104. Demolding platform, 105. Vertical cylinder, 106. Suction cup, 107. Lifting pipe, 108. Air supply channel, 109. Sealing part, 110. Vent hole, 111. Sealing gasket, 112. Die groove, 113. Air pressure chamber. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments.

[0028] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] The first aspect of the utility model, such as Figure 1 , Figure 2 and Figure 3 As shown, vacuum forming of plastic products often involves thin-walled plastic parts with intricate surface details. If the product is not fully cooled, mechanical ejection can easily damage its surface. Furthermore, if the inner groove of the mold is deep, it is difficult to remove it using air pressure. Therefore, this solution employs a suction cup for demolding.

[0030] Specifically, a demolding platform 104 is provided above the mold 101 used for vacuum forming. A suction cup 106 is provided at the bottom of the demolding platform 104. A lifting tube 107 is fixedly connected to the upper end of the suction cup 106. The lifting tube 107 is slidably connected to the demolding platform 104.

[0031] Additionally, a vertical cylinder 105 is provided on the demolding platform 104, and a through air pressure chamber 113 is provided inside the vertical cylinder 105 and the demolding platform 104. The air pressure chamber 113 is connected to an external air source, and the lifting pipe 107 is located inside the air pressure chamber 113. The top of the lifting pipe 107 is provided with a sealing member 109 to block the upper port of the lifting pipe 107.

[0032] Preferably, there are several suction cups 106, and there are also several corresponding vertical cylinders 105, lifting tubes 107 and sealing parts 109.

[0033] The cooled plastic product is picked up and lifted by suction cup 106, allowing for demolding and removal of the plastic product, greatly facilitating the operation of construction workers and improving efficiency. Furthermore, suction cup 106 is made of soft rubber, so using it to pick up plastic products will not damage the outer surface of the plastic product.

[0034] The second aspect of this utility model is as follows: Figure 1 , Figure 4 and Figure 5 As shown, the suction cup adsorption and lifting method is generally suitable for demolding plastic products formed by vacuum forming in deep inner grooves. However, the suction cup adsorption and lifting method often requires a relatively complex structure, such as air suction and drive lifting structures, resulting in high cost and inconvenience. This example designs a new structure with a sealing component 109 at the top of the lifting tube 107. The sealing component 109 consists of a frustum and a circular plate. The frustum is fixedly connected to the bottom center of the circular plate, and the maximum diameter of the frustum is the same as the inner diameter of the lifting tube 107. The diameter of the circular plate is the same as that of the air pressure chamber 113, and the circular plate is slidably connected to the inner wall of the air pressure chamber 113.

[0035] A sealing gasket 111 is provided at the bottom of the air pressure chamber 113. The sealing gasket 111 is sleeved on the outside of the lifting pipe 107 and fixedly connected to the demolding platform 104. A vent hole 110 is also provided on the circular plate outside the truncated cone, which runs vertically through the top and bottom.

[0036] By sealing the upper port of the lifting tube 107 with the sealing piece 109, air supply to the pneumatic chamber 113 can drive the lifting tube 107, carrying the suction cup 106, to descend. Once the suction cup 106 has adhered to the plastic product, the lower port of the lifting tube 107 is sealed, so air supply to the pneumatic chamber 113 can drive the lifting tube 107, carrying the suction cup 106 and the plastic product, to rise. This eliminates the need for a specially designed lifting and lowering mechanism, saving costs.

[0037] Additionally, a base 102 is provided below the mold 101. The mold 101 is fixedly connected to the base 102 via a bracket 103, and the demolding platform 104 is also fixedly connected to the base 102 via the bracket 103. A through-flow air supply channel 108 is provided within the demolding platform 104, the bracket 103, and the base 102. The air pressure chamber 113 is connected to the air supply channel 108 and is also connected to an external air source through the air supply channel 108. A solenoid valve is also provided in the air supply channel 108 within the demolding platform 104. The external air source can perform air supply and extraction operations, and the solenoid valve can control the opening and closing of the air supply channel 108 within the demolding platform 104.

[0038] The bottom of the concave mold groove 112 of mold 101 is provided with several air holes for vacuum forming or air blowing demolding. These air holes are connected to an external air source through the air supply channel 108 in the base 102. Vacuum forming is performed through these air holes. After the forming is completed, air is released through these air holes to detach the plastic product from the mold. Finally, the suction cup 106 picks up the plastic product and removes it.

[0039] Since the sealing element 109 is placed on the upper end of the lifting tube 107, after the suction cup 106 presses onto the plastic product, the air extraction in the air pressure chamber 113 causes the sealing element 109 to slide upward automatically, thereby opening the lifting tube 107 for conduction. Therefore, the air extraction in the air pressure chamber 113 also causes the suction cup 106 to adhere to the plastic product, and finally, the lifting tube 107 carries the suction cup 106 and the plastic product upward. The entire process only requires controlling the air supply and extraction in the air pressure chamber 113, without any additional operations, making it simple and convenient.

[0040] In summary, this utility model, by setting up a demolding platform 104 and a suction cup 106 at the bottom of the demolding platform 104, allows the cooled plastic product to be adhered to and lifted by the suction cup 106, thus achieving demolding and removal of the plastic product. This greatly facilitates the operation of construction personnel and improves efficiency. Furthermore, since the suction cup 106 is made of soft rubber, it will not damage the outer surface of the plastic product when using it to pick it up.

[0041] The suction cup 106's suction and adsorption are achieved through the lifting tube 107, and the lifting of the plastic product after the suction cup 106 has adsorbed it is also achieved through the lifting tube 107. A sealing member 109 is provided at the top of the lifting tube 107, blocking the upper port of the lifting tube 107. Therefore, air supply to the air pressure chamber 113 drives the lifting tube 107, carrying the suction cup 106, to descend. Once the suction cup 106 has adsorbed the plastic product, the lower port of the lifting tube 107 is blocked, so air supply to the air pressure chamber 113 drives the lifting tube 107, carrying the suction cup 106 and the plastic product, to rise. No special lifting and driving mechanism is needed, saving costs. The sealing member 109 is placed at the upper port of the lifting tube 107; therefore, after the suction cup 106 presses onto the plastic product, air extraction from the air pressure chamber 113 causes the sealing member 109 to slide automatically upward, thereby opening the lifting tube 107 for conduction. Therefore, the air extraction in the air pressure chamber 113 will also cause the suction cup 106 to stick to the plastic product. Finally, the suction cup 106 and the plastic product will be lifted up through the lifting tube 107. The whole process only needs to be controlled by supplying and extracting air in the air pressure chamber 113. No other operation is required, which is simple and convenient.

[0042] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention includes the claims being limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0043] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mold release device for vacuum forming, comprising a mold (101) for vacuum forming, characterized in that, The demolding device further includes: A demolding platform (104) is provided above the mold (101). The bottom of the demolding platform (104) is provided with a suction cup (106). A lifting tube (107) is fixedly connected to the upper end of the suction cup (106). The lifting tube (107) is slidably connected to the demolding platform (104). A vertical cylinder (105) is fixedly connected to the demolding platform (104). The vertical cylinder (105) and the demolding platform (104) are provided with a through air pressure chamber (113). The air pressure chamber (113) is connected to an external air source. The lifting pipe (107) is located in the air pressure chamber (113), and the top of the lifting pipe (107) is provided with a sealing part (109) to block the upper port of the lifting pipe (107).

2. The mold demolding device for vacuum forming according to claim 1, characterized in that, The suction cup (106) is provided in several units, and the corresponding vertical cylinder (105), lifting tube (107) and sealing component (109) are also provided in several units.

3. A mold release device for vacuum forming according to claim 1 or 2, characterized in that, The bottom of the air pressure chamber (113) is provided with a sealing gasket (111), which is sleeved on the outside of the lifting pipe (107) and fixedly connected to the demolding platform (104).

4. The mold demolding device for vacuum forming according to claim 1, characterized in that, The sealing component (109) consists of a frustum and a circular plate. The frustum is fixedly connected to the bottom center of the circular plate, and the maximum diameter of the frustum is the same as the inner diameter of the lifting tube (107). The diameter of the circular plate is the same as that of the air pressure chamber (113), and the circular plate is slidably connected to the inner wall of the air pressure chamber (113).

5. A mold release device for vacuum forming according to claim 4, characterized in that, The outer circular plate of the frustum is also provided with a vertically penetrating vent (110).

6. The mold demolding device for vacuum forming according to claim 1, characterized in that, A base (102) is provided below the mold (101). The mold (101) is fixedly connected to the base (102) by a bracket (103). The demolding platform (104) is also fixedly connected to the base (102) by a bracket (103).

7. A mold release device for vacuum forming according to claim 6, characterized in that, The demolding platform (104), support (103) and base (102) are provided with a through air supply channel (108). The air pressure chamber (113) is connected to the air supply channel (108) and is connected to an external air source through the air supply channel (108). A solenoid valve is also provided in the air supply channel (108) in the demolding platform (104).

8. A mold release device for vacuum forming according to claim 6, characterized in that, The bottom of the cavity groove (112) of the mold (101) is provided with several air holes for vacuum forming or air blowing demolding. The air holes are connected to an external air source through the air supply channel (108) in the base (102).

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