Heating device for plastic uptake forming

Abstract

The utility model discloses a heating device for plastic uptake forming, and relates to the technical field of plastic uptake forming. The plastic uptake device comprises a plastic uptake box, a top plate is fixedly connected above the plastic uptake box through supporting columns, an air cylinder is fixedly installed at the top of the top plate, the lower end of the air cylinder movably penetrates through the top plate and is fixedly connected with a lifting plate, and a silicate heat insulation cover is fixedly connected to the bottom of the lifting plate. Through the arrangement of the lower heating plate and the upper heating plate, the top and the bottom of a plastic sheet placed above the lower heating plate can be heated at the same time, the heating efficiency of the plastic sheet is improved, meanwhile, the bottom of the silicate heat insulation cover is moved to be in contact with the top of the plastic uptake box, and therefore the plastic uptake box is heated. Through cooperation of a silicate heat insulation cover and a silicate heat insulation plate, heat loss in the heating process of a plastic sheet can be relieved, an electric push rod is driven to drive a jacking seat to move upwards, a cooled and formed product in a mold cavity can be jacked out upwards through the jacking seat, and workers can conveniently demold and take out the product.

Description

Technical Field

[0001] This utility model belongs to the field of vacuum forming technology, and in particular relates to a heating device for vacuum forming. Background Technology

[0002] Vacuum forming, also known as thermoforming, is a common plastic processing method. It involves heating a plastic sheet to soften it, then adhering it to a mold surface, and finally cooling and solidifying it into the desired shape. The vacuum forming process typically includes the following steps: preparing the mold, preparing the plastic sheet, heating the plastic sheet, adhering it to the mold surface, cooling and solidifying, and removing the finished product. Vacuum forming has advantages such as low cost, high production efficiency, and strong ability to create complex shapes, and is therefore widely used in the manufacture of various plastic products, such as packaging boxes, display racks, models, and toys. A search revealed patent application number 202322280926.8, which discloses a heating device for vacuum forming, including a vacuum forming machine body. The bottom of the machine body has a vacuum forming box, the box has a mold groove, cylinders are located at the four corners of the box, and the cylinder extension rods pass through the box and extend to the top. Side plates are located on both sides of the box.

[0003] However, in actual use, the applicant found that during the process of heating and softening the plastic sheet below it by the heater, the lack of heat insulation structure resulted in a large heat loss during the heating process of the plastic sheet. In view of this, we propose a heating device for vacuum forming. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0005] This utility model relates to a heating device for vacuum forming, comprising a vacuum forming box. A top plate is fixedly connected to the top of the vacuum forming box via a support column. A cylinder is fixedly mounted on the top of the top plate. The lower end of the cylinder movably passes through the top plate and is fixedly connected to a lifting plate. A silicate heat insulation cover is fixedly connected to the bottom of the lifting plate. An upper heating plate is fixedly connected to the top of the inner side of the silicate heat insulation cover. A mold cavity is formed on the top of the vacuum forming box below the upper heating plate. A lower heating plate is fixedly connected to the top of the vacuum forming box outside the mold cavity. A silicate heat insulation board is fixed in the blister box below the lower heating plate. An inner cavity is opened in the blister box below the mold cavity. The mold cavity is connected to the interior of the inner cavity through an air suction hole opened at the bottom of the mold cavity. An air extraction pipe is fixedly connected to one side of the blister box. One end of the air extraction pipe inside the blister box extends into the inner cavity. A lifting seat is set at the center of the bottom of the mold cavity. An electric push rod is set in the inner cavity below the lifting seat. The upper end of the electric push rod is fixedly connected to the bottom of the lifting seat.

[0006] Preferably, the bottom of the mold cavity is provided with a receiving groove, and the lifting seat is disposed in the receiving groove.

[0007] Preferably, the lifting seat is arranged in an inverted trapezoidal shape, the top of the lifting seat is flush with the bottom of the inner side of the mold cavity, a support block is fixedly connected to the bottom of the inner side of the inner cavity, and the electric push rod is fixedly installed on the top of the support block.

[0008] Preferably, four support columns are provided, with the lower ends of the four support columns fixedly connected to the four corner positions of the top of the blister box, and the upper ends of the four support columns fixedly connected to the four corner positions of the bottom of the top plate.

[0009] Preferably, the four support columns are respectively movably inserted through the four corner positions of the lifting plate.

[0010] Preferably, the bottom of the mold cavity has several air suction holes, and the outer end of the air suction pipe is connected to the air inlet of the vacuum compressor in the external thermoforming machine.

[0011] This utility model has the following beneficial effects:

[0012] This utility model discloses a heating device for vacuum forming. Through the arrangement of a lower heating plate and an upper heating plate, the top and bottom of a plastic sheet placed above the lower heating plate can be heated simultaneously, improving the heating efficiency of the plastic sheet. Simultaneously, by moving the bottom of the silicate heat insulation cover to contact the top of the vacuum forming box, the cooperation between the silicate heat insulation cover and the silicate heat insulation plate reduces heat loss during the heating process of the plastic sheet. By driving an electric push rod to move the lifting seat upwards, the product cooled and formed inside the mold cavity can be ejected upwards, facilitating demolding and removal by personnel. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the external structure of a heating device for vacuum forming according to the present invention;

[0015] Figure 2 This is a schematic diagram of the internal structure of a heating device for vacuum forming according to the present invention;

[0016] Figure 3 This utility model relates to a heating device for vacuum forming. Figure 2Enlarged view of the structure at point A in the middle.

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 1. Blister box; 2. Support column; 3. Lifting plate; 4. Top plate; 5. Cylinder; 6. Suction hole; 7. Mold cavity; 8. Lifting seat; 9. Lower heating plate; 10. Air extraction pipe; 11. Silicate heat insulation cover; 12. Upper heating plate; 13. Inner cavity; 14. Silicate heat insulation plate; 15. Electric push rod; 16. Support block; 17. Receiving groove. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 As shown, this utility model provides a technical solution:

[0021] A heating device for vacuum forming includes a vacuum forming box 1. A top plate 4 is fixedly connected to the top of the vacuum forming box 1 via support columns 2. Four support columns 2 are provided, with their lower ends fixedly connected to the four corners of the top of the vacuum forming box 1, and their upper ends fixedly connected to the four corners of the bottom of the top plate 4. A cylinder 5 is fixedly mounted on the top of the top plate 4, with its lower end movably penetrating the top plate 4 and fixedly connected to a lifting plate 3. The four support columns 2 movably penetrate the four corners of the lifting plate 3. A silicate heat insulation cover 11 is fixedly connected to the bottom of the lifting plate 3, and an upper heating plate 12 is fixedly connected to the top of the inner side of the silicate heat insulation cover 11. The top of the vacuum forming box 1 is located below the upper heating plate 12. A mold cavity 7 is provided. A lower heating plate 9 is fixedly connected to the top of the blister box 1 outside the mold cavity 7. The cylinder 5, the lower heating plate 9, and the upper heating plate 12 are electrically connected to an external blister forming machine via wires and are uniformly controlled by a controller on the external blister forming machine. (Details omitted here.) A silicate heat insulation plate 14 is fixed in the blister box 1 below the lower heating plate 9. The lower heating plate 9 and the upper heating plate 12 allow for simultaneous heating of the top and bottom of the plastic sheet placed above the lower heating plate 9, improving the heating efficiency of the plastic sheet. Simultaneously, by moving the bottom of the silicate heat insulation cover 11 to contact the top of the blister box 1, the cooperation between the silicate heat insulation cover 11 and the silicate heat insulation plate 14 can slow down the heating of the plastic sheet. To mitigate heat loss during the heating process of the plastic sheet, an inner cavity 13 is provided in the blister box 1 below the mold cavity 7. The mold cavity 7 communicates with the interior of the inner cavity 13 through suction holes 6 at the bottom of the mold cavity 7. Several suction holes 6 are provided at the bottom of the mold cavity 7. An air extraction pipe 10 is fixedly connected to one side of the blister box 1. One end of the air extraction pipe 10 inside the blister box 1 extends into the inner cavity 13, and the outer end of the air extraction pipe 10 is connected to the air inlet of the vacuum compressor in the external blister machine. In use, the plastic sheet to be blistered can be placed on top of the lower heating plate 9, and the cylinder 5 is driven to move the lifting plate 3 downward. The downward movement of the lifting plate 3 can move the silicate heat insulation cover 11 and the upper heating plate 12 downward together, so that the silicate heat insulation cover... The bottom of 11 is attached to the top of the blister box 1. At this time, the lower heating plate 9 and the upper heating plate 12 are energized, and the plastic sheet can be heated and thermoformed through the lower heating plate 9 and the upper heating plate 12. During this process, the heat loss can be reduced by the silicate heat insulation plate 14 and the silicate heat insulation cover 11. After the plastic sheet is thermoformed and softened, the external vacuum compressor is turned on, and the vacuum is drawn into the mold cavity 7 through the air extraction pipe 10, so that the mold cavity 7 generates negative pressure. At this time, under the action of negative pressure, the softened plastic sheet can cover the surface of the mold cavity 7. Then, the heating of the lower heating plate 9 and the upper heating plate 12 can be stopped, and the cylinder 5 is driven to move the lifting plate 3 together with the silicate heat insulation cover 11 upward, and wait for the product to cool and form.

[0022] A lifting seat 8 is located at the center of the bottom of the mold cavity 7. An electric push rod 15 is installed in the inner cavity 13 below the lifting seat 8. The upper end of the electric push rod 15 is fixedly connected to the bottom of the lifting seat 8. By driving the electric push rod 15, the lifting seat 8 is moved upwards, allowing the cooled and formed product inside the mold cavity 7 to be ejected upwards, facilitating demolding and removal. A receiving groove 17 is provided at the bottom of the mold cavity 7, and the lifting seat 8 is located in the receiving groove 17. The lifting seat 8 is an inverted trapezoidal truncated cone shape. The top of the mold is flush with the bottom of the inner side of the cavity 7. A support block 16 is fixedly connected to the bottom of the inner side of the cavity 13. An electric push rod 15 is fixedly installed on the top of the support block 16. After the product cools and forms, the electric push rod 15 drives the lifting seat 8 to move upward. The lifting seat 8 can eject the product from the mold cavity 7 and demold it. After the product is ejected, the electric push rod 15 can drive the lifting seat 8 to move downward and move the lifting seat 8 back into the receiving groove 17, so that a new plastic sheet can be vacuum formed.

[0023] Working principle: In use, the plastic sheet to be thermoformed can be placed on top of the lower heating plate 9, and the driving cylinder 5 drives the lifting plate 3 to move downward. The downward movement of the lifting plate 3 can drive the silicate heat insulation cover 11 and the upper heating plate 12 to move downward together, so that the bottom of the silicate heat insulation cover 11 is in contact with the top of the thermoforming box 1. At this time, the lower heating plate 9 and the upper heating plate 12 are energized, and the plastic sheet can be heated and thermoformed through the lower heating plate 9 and the upper heating plate 12. During this process, the heat loss can be reduced by the silicate heat insulation plate 14 and the silicate heat insulation cover 11. After the plastic sheet is thermoformed and softened, the external vacuum compressor is turned on, and the mold cavity 7 is evacuated through the suction pipe 10. The internal vacuum is drawn to create negative pressure inside the mold cavity 7. Under this negative pressure, the softened plastic sheet can cover the surface of the mold cavity 7. Then, the heating of the lower heating plate 9 and the upper heating plate 12 can be stopped, and the cylinder 5 is driven to move the lifting plate 3 along with the silicate heat insulation cover 11 upward. Wait for the product to cool and solidify. After the product has cooled and solidified, the electric push rod 15 is driven to move the lifting seat 8 upward. The lifting seat 8 can eject the product from the mold cavity 7 and demold it. After the product is ejected, the electric push rod 15 can move the lifting seat 8 downward and move the lifting seat 8 back into the receiving groove 17, so that a new plastic sheet can be vacuum formed.

[0024] The text shows and describes the basic principles, main features and advantages of this utility model. The standard parts used in this utility model can all be purchased from the market, and the irregular parts can be customized according to the description and drawings. The specific connection methods of each part can all adopt conventional methods such as bolts, rivets and welding that are mature in the prior art. The machinery, parts and equipment can all adopt conventional models in the prior art. In addition, the circuit connection adopts conventional connection methods in the prior art. This part will not be described in detail in the text.

[0025] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0026] The above are merely preferred embodiments of the present utility model and do not limit the present utility model. Any modifications to the technical solutions described in the foregoing embodiments or equivalent substitutions of some of the technical features shall fall within the protection scope of the present utility model.

Claims

1. A heating device for vacuum forming, comprising a vacuum forming box (1), characterized in that: A top plate (4) is fixedly connected to the top of the blister box (1) via a support column (2). A cylinder (5) is fixedly installed on the top of the top plate (4). The lower end of the cylinder (5) movably passes through the top plate (4) and is fixedly connected to a lifting plate (3). A silicate heat insulation cover (11) is fixedly connected to the bottom of the lifting plate (3). An upper heating plate (12) is fixedly connected to the top of the inner side of the silicate heat insulation cover (11). A mold cavity (7) is opened on the top of the blister box (1) below the upper heating plate (12). A lower heating plate (9) is fixedly connected to the top of the blister box (1) outside the mold cavity (7). The blister box (1) below the lower heating plate (9) contains... A silicate heat insulation board (14) is fixedly provided. An inner cavity (13) is provided in the blister box (1) below the mold cavity (7). The mold cavity (7) is connected to the interior of the inner cavity (13) through the air suction hole (6) opened at the bottom of the mold cavity (7). An air extraction pipe (10) is fixedly connected to one side of the blister box (1). One end of the air extraction pipe (10) located inside the blister box (1) extends into the inner cavity (13). A lifting seat (8) is provided at the center of the bottom of the mold cavity (7). An electric push rod (15) is provided in the inner cavity (13) below the lifting seat (8). The upper end of the electric push rod (15) is fixedly connected to the bottom of the lifting seat (8).

2. The heating device for vacuum forming according to claim 1, characterized in that, The bottom of the mold cavity (7) is provided with a receiving groove (17), and the lifting seat (8) is provided in the receiving groove (17).

3. The heating device for vacuum forming according to claim 2, characterized in that, The lifting seat (8) is arranged in an inverted trapezoidal shape. The top of the lifting seat (8) is flush with the bottom of the inner side of the mold cavity (7). A support block (16) is fixedly connected to the bottom of the inner side of the inner cavity (13). The electric push rod (15) is fixedly installed on the top of the support block (16).

4. The heating device for vacuum forming according to claim 1, characterized in that, The support column (2) is provided in four parts. The lower ends of the four support columns (2) are fixedly connected to the four corner positions of the top of the blister box (1), and the upper ends of the four support columns (2) are fixedly connected to the four corner positions of the bottom of the top plate (4).

5. A heating device for vacuum forming according to claim 4, characterized in that, The four support columns (2) are respectively located at the four corners of the lifting plate (3).

6. The heating device for vacuum forming according to claim 1, characterized in that, The bottom of the mold cavity (7) has several air suction holes (6), and the outer end of the air extraction pipe (10) is connected to the air inlet of the vacuum compressor in the external thermoforming machine.

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