Heating mechanism of plastic vacuum forming machine

Abstract

The utility model discloses a heating mechanism of a plastic vacuum forming machine, which comprises a heating component, a moving frame and a controller, the heating component is arranged at a heating station, a forming station is arranged on the side of the heating station, the heating component comprises an upper heating piece and a lower heating piece, and a heating space is arranged between the upper heating piece and the lower heating piece. The upper heating piece is divided into a plurality of upper heating blocks, and the plurality of upper heating blocks are distributed in a rectangular array; the moving frame longitudinally moves between the heating station and the forming station; and the plurality of upper heating blocks of the upper heating piece are electrically connected with the controller respectively. And the moving frame conveys the plate to a heating station, and the controller controls the temperature and the heating duration of each upper heating block, so that the plate is uniformly heated, the softening effect is balanced, and the forming effect is improved.

Description

Technical Field

[0001] The utility model relates to an improved invention of a blister machine, in particular to a heating mechanism of the blister machine. Background Art

[0002] The sheet of the blister machine is heated and softened before being blister formed. During the heating process, it is crucial to ensure that the sheet is heated evenly, because this directly affects the forming effect. If the sheet is heated unevenly in the heating zone, it may cause uneven thickness, deformation or other quality problems in the formed product.

[0003] The molding and heating of the blister machine are set adjacent to each other. The sheet enters the heating station from the molding station, and then returns from the heating station to the molding station after heating is completed. As a result, the end of the sheet close to the heating station is heated for a longer time, resulting in uneven heating of the sheet, which affects the molding effect. Summary of the invention

[0004] In view of the technical problems existing in the background technology, the technical problem solved by the utility model is to provide a heating mechanism of a blister machine with uniform heating and better molding effect.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solution: the heating mechanism of the blister machine is characterized by comprising a heating component, a moving frame and a controller.

[0006] A heating component is arranged at a heating station, a molding station is arranged on the side of the heating station, the heating component comprises an upper heating element and a lower heating element, a heating space is provided between the upper heating element and the lower heating element, the upper heating element is divided into a plurality of upper heating blocks, the plurality of upper heating blocks are distributed in a rectangular array, and the plurality of upper heating blocks of the upper heating element are electrically connected to the controller respectively;

[0007] A moving frame moves longitudinally between the heating station and the forming station.

[0008] The moving frame delivers the sheet to the heating station, and the controller controls the temperature and heating time of each heating block, so that the sheet is heated evenly and the softening effect is balanced, thereby improving the forming effect.

[0009] Preferably, the lower heating element is divided into a plurality of lower heating blocks, which are distributed in a rectangular array, and the plurality of lower heating blocks of the lower heating element are electrically connected to the controller respectively. The temperature and heating time of the lower heating blocks are also controlled by the controller, so as to further optimize the heating effect of the plate.

[0010] Preferably, the lower heating element comprises a plurality of main heating tubes, which are evenly arranged longitudinally and electrically connected to the controller respectively. The lower heating element is heated by the heating tubes, and the temperature and heating time of each heating tube are controlled by the controller so that the plate is heated evenly.

[0011] Preferably, the lower heating element further comprises an auxiliary heating pipe, which is interspersed between the main heating pipes and electrically connected to the controller. The auxiliary heating pipe is used to supplement the temperature of special products.

[0012] Preferably, an isolation net is provided above the lower heating element. When the plate softens and sags due to heating, the isolation net prevents the sagged plate from contacting the lower heating element, thereby improving safety.

[0013] Preferably, a heating wire is provided in the upper heating block, and the heating wire heats the block and has a high temperature.

[0014] As a preference, BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of Embodiment 1 of the present utility model.

[0016] Figure 2 This is a schematic diagram of the second embodiment of the present utility model.

[0017] Figure 3 This is a schematic diagram of the lower heating element of the second embodiment of the utility model.

[0018] Figure 4 It is a schematic diagram of the heating element of the utility model. DETAILED DESCRIPTION

[0019] The following describes the details and working principle of the implementation and embodiment of the utility model in conjunction with the accompanying drawings. The heating mechanism of the blister machine includes heating components 3, 4, moving frames 1, 2 and a controller. The heating components are arranged at a heating station. A molding station 6 is arranged on the side of the heating station. The heating components include an upper heating element 3 and a lower heating element 4, with a heating space between the two. The upper heating element is divided into a plurality of upper heating blocks 11, which are distributed in a rectangular array, as shown in the attached figure. Figure 3As shown; the movable frame moves longitudinally between the heating station and the forming station, and the several upper heating blocks 11 of the upper heating element are electrically connected to the controller respectively, that is, the temperature and heating time of each heating block are controlled by the controller. In order to improve production efficiency and reduce equipment costs, the forming station includes a first forming station 5 and a second forming station 7, and they are respectively arranged on both sides of the heating station 6. In the figure, the first forming station is on the left and the second forming station is on the right. The movable frame is divided into a first movable frame 1 and a second movable frame 2. The first movable frame moves between the first forming station and the heating station, and the second movable frame moves between the second forming station and the heating station; when the first movable frame moves to the first forming station for forming, the second movable frame heats from the second forming station to the heating station, and the left end of the plate is heated first, and the left end is heated relative to the right end. The time is long, so when the plate in the second moving frame is heated, the temperature of the left side of the heating station is higher than that of the right side. In this way, when the plate on the second moving frame is at the heating station, the heating time of the right end of the plate is short but the temperature is high, and the heating time of the left end of the plate is long but the temperature is slightly lower. In this way, the left and right sides of the plate are heated more evenly, the softening effect is balanced, and the molding effect is better. After the heating of the plate in the second moving frame is completed, it is moved to the second molding station for molding. At this time, the plate in the first molding station has been molded and taken out, and the new plate is sent to the heating station by the first moving frame for heating. Because the first moving frame is from left to right, the temperature on the left side of the heating station is higher than that on the right side, and this process is repeated.

[0020] In the first embodiment, the lower heating element 4 is divided into several lower heating blocks, and the several lower heating blocks are distributed in a rectangular array. The several lower heating blocks of the lower heating element are electrically connected to the controller respectively. The upper heating block and the lower heating block are provided with electric heating wires. The electric heating wires heat the blocks and have high temperatures, and the softening effect is good. In the second embodiment, the lower heating element 4 includes several main heating tubes 8, and the several main heating tubes are evenly arranged longitudinally, and the several heating tubes are electrically connected to the controller respectively. The lower heating element 4 is heated by the heating tubes, and the temperature and heating time of each heating tube are controlled by the controller to make the plate heated evenly. Some plates have special components, and the temperature required for softening is higher than that of conventional plates. The required temperature cannot be reached by the main heating tube 8 alone. In order to solve this problem, the lower heating element also includes an auxiliary heating tube 9, which is interspersed between the main heating tubes. The auxiliary heating tube is electrically connected to the controller. When the conventional plate is heated, the auxiliary heating tube does not heat, and only the main heating tube heats. When the special plate is heated, the main heating tube and the auxiliary heating tube work at the same time, and the auxiliary heating tube adds supplementary temperature to increase the heating temperature. The lower heating element, whether a heating block or a heating tube, is controlled by a controller to control the heating temperature and heating time, so that the plate is heated evenly and the forming effect is improved. The plate softens and sags when heated, and the sagging plate contacts the lower heating element, which may cause a fire. An isolation net 10 is provided above the lower heating element to prevent the sagging plate from contacting the lower heating element, thereby improving safety.

Claims

1. A heating mechanism for a blister machine, characterized in that: It includes a heating component, a moving frame and a controller. A heating component is arranged at a heating station, a molding station is arranged on the side of the heating station, the heating component comprises an upper heating element and a lower heating element, a heating space is provided between the upper heating element and the lower heating element, the upper heating element is divided into a plurality of upper heating blocks, the plurality of upper heating blocks are distributed in a rectangular array, and the plurality of upper heating blocks of the upper heating element are electrically connected to the controller respectively; A moving frame moves longitudinally between the heating station and the forming station.

2. The heating mechanism of the blister machine according to claim 1, characterized in that: The lower heating element is divided into a plurality of lower heating blocks, and the plurality of lower heating blocks are distributed in a rectangular array. The plurality of lower heating blocks of the lower heating element are electrically connected to the controller respectively.

3. The heating mechanism of the blister machine according to claim 1 or 2, characterized in that: The lower heating element comprises a plurality of main heating tubes, the plurality of main heating tubes are evenly arranged longitudinally, and the plurality of heating tubes are electrically connected to the controller respectively.

4. The heating mechanism of the blister machine according to claim 3 is characterized in that: The lower heating element also includes an auxiliary heating tube, which is inserted between the main heating tubes and is electrically connected to the controller.

5. The heating mechanism of the blister machine according to claim 1 is characterized in that: An isolation net is arranged above the lower heating element.

6. The heating mechanism of the blister machine according to claim 1, characterized in that: The upper heating block is provided with a heating wire.

7. The heating mechanism of the blister machine according to claim 1, characterized in that: The molding station includes a first molding station and a second molding station, and they are respectively arranged on both sides of the heating station. The movable frame is divided into a first movable frame and a second movable frame. The first movable frame moves between the first molding station and the heating station, and the second movable frame moves between the second molding station and the heating station.

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