Sheet forming auxiliary heating device

Abstract

This application discloses an auxiliary heating device for sheet forming, which is detachably installed on a forming equipment. The auxiliary heating device for sheet forming includes: a semi-arc-shaped heat insulation cover, a heat insulation layer installed inside the heat insulation cover, a heating component, and an opening and closing mechanism installed between the heat insulation cover and the forming equipment. A cooling channel for unidirectional circulation of cold water is formed inside the heat insulation cover. The heating component includes several heating tubes, several thermocouples, and a temperature control device. The temperature control device is electrically connected to the several heating tubes and several thermocouples. The opening and closing mechanism includes a pair of cylinders arranged opposite each other on the left and right sides. The pair of cylinders are connected to the outer shell of the heat insulation cover and can synchronously drive the heat insulation cover to move back and forth radially along the rollers of the forming equipment. The auxiliary heating device for sheet forming of this application preheats the product, improves the forming efficiency of the product on the forming equipment, effectively reduces heat waste, avoids operator burns from accidental contact, and is suitable for products of different thicknesses.

Description

Technical Field

[0001] This application relates to the field of plastic product molding production equipment technology, and in particular to an auxiliary heating device for sheet molding. Background Technology

[0002] In traditional GPPS sheet production lines, the auxiliary heating device has a high heating tube temperature, which leads to a very high surface temperature of the heating cover, resulting in significant heat loss and energy waste, greatly increasing production costs. The high surface temperature of the heating cover can easily burn employees during production, posing a safety hazard. At the same time, the distance between the heating cover and the roller surface is manually adjusted by a screw, which is inconvenient to operate. If the adjustment is not synchronized, the heating cover may tilt and damage the roller and the product. Summary of the Invention

[0003] In order to solve the above-mentioned technical problems, the purpose of this application is to provide an auxiliary heating device for sheet forming.

[0004] To achieve the above objectives, this application adopts the following technical solution: a sheet forming auxiliary heating device, installed on the forming equipment and arranged close to the rollers of the forming equipment, the sheet forming auxiliary heating device comprising:

[0005] A heat shield, in a semi-circular shape, surrounds the outside of the roller. The heat shield includes an outer shell, an inner shell installed inside the outer shell, and a cooling channel formed between the outer shell and the inner shell, wherein cold water flows through the cooling channel.

[0006] An insulation layer is installed on the inner side of the inner casing;

[0007] A heating assembly includes several heating tubes, several thermocouples, and a temperature control device. The heating tubes and thermocouples are all installed inside the insulation layer, and the temperature control device is electrically connected to the heating tubes and thermocouples.

[0008] An opening and closing mechanism is installed on the frame of the molding equipment and connected to the heat insulation cover. The opening and closing mechanism includes a pair of cylinders arranged opposite each other on the left and right sides. The pair of cylinders are connected to the outer shell of the heat insulation cover and are configured to synchronously drive the heat insulation cover to move back and forth along the radial direction of the roller.

[0009] In the above technical solution, it is further preferred that the cooling channel includes a plurality of channel holes, the plurality of channel holes are distributed at intervals along the circumference of the roller, and each of the channel holes is parallel to the axis of the roller, and the plurality of channel holes are connected in sequence to form a unidirectional cooling channel.

[0010] In the above technical solution, it is further preferred that the insulation layer is made of heat insulation material.

[0011] In the above technical solution, it is further preferred that the plurality of thermocouples are arranged at intervals along the left-right direction.

[0012] In the above technical solution, it is further preferred that the plurality of heating tubes are divided into multiple heating groups, the multiple heating groups are arranged sequentially in the left-right direction, each heating group is equipped with one thermocouple, and the heating tubes of each heating group are arranged at intervals along the arc of the heat insulation cover.

[0013] In the above technical solution, a further preferred embodiment is that the opening and closing mechanism further includes a pair of guide components, each of the cylinders is equipped with one of the guide components, each of the guide components includes a guide post extending radially along the roller and a linear bearing sleeved on the guide post, the guide post is fixedly installed on the frame, the linear bearing is connected to the heat insulation cover, and the linear bearing is slidably engaged with the guide post.

[0014] Compared with the prior art, this application achieves the following beneficial effects:

[0015] This application is installed at the roller of the forming equipment to preheat the product that bypasses the roller, thereby improving the forming efficiency of the product and the applicability and production efficiency of the equipment; a cooling channel is set inside the heat insulation cover, and an insulation layer is set between the heat insulation cover and the heating component, which effectively reduces the heat waste of the heating component and prevents operators from being burned by accidentally touching the heat insulation cover; the opening and closing mechanism between the heat insulation cover and the frame of the forming equipment can adjust the distance between the sheet forming auxiliary heating device and the roller, which is convenient to operate and can be used for the production of products of different thicknesses. Attached Figure Description

[0016] Figure 1 A schematic diagram of a sheet forming auxiliary heating device installed on a forming equipment, provided in an embodiment of this application;

[0017] Figure 2 For along Figure 1 A sectional view cut along line AA in the diagram;

[0018] Figure 3 for Figure 2 A schematic diagram of the auxiliary heating device for sheet forming in the middle;

[0019] Figure 4 for Figure 3 A schematic diagram of the cooling channel structure in the middle;

[0020] Figure 5 for Figure 3 A schematic diagram of the heating component in the diagram;

[0021] The components are as follows: 10. Frame; 20. Roller assembly; 1. Upper roller; 2. Middle roller; 3. Lower roller; 30. Sheet forming auxiliary heating device; 4. Heat insulation cover; 41. Outer cover; 42. Inner cover; 43. Cooling channel; 431. Channel hole; 5. Insulation layer; 6. Heating assembly; 61. Heating tube; 62. Thermocouple; 7. Opening and closing mechanism; 71. Cylinder; 72. Guide assembly; 721. Guide post; 722. Linear bearing. Detailed Implementation

[0022] To illustrate the technical content, structural features, achieved objectives, and effects of the application in detail, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, structure, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0023] This application provides an auxiliary heating device for sheet forming, such as... Figure 1 , 2 As shown, the sheet forming auxiliary heating device 30 is installed on a forming equipment, which includes a frame 10 and a roller assembly 20 mounted on the frame 10. The sheet forming auxiliary heating device 30 is mounted on the frame 10 and arranged close to the roller assembly 20.

[0024] The roller assembly 20 includes an upper roller 1, a middle roller 2 and a lower roller 3 arranged sequentially from top to bottom. The upper roller 1, the middle roller 2 and the lower roller 3 all extend in the left and right direction and are rotatably mounted on the frame 10 about their own axis. The upper roller 1 and the lower roller 3 are configured to be able to approach and move away from the middle roller 2. An auxiliary heating device 30 is installed at the middle roller 2 for heating products that pass around the middle roller 2.

[0025] In this embodiment, the product enters the sheet forming auxiliary heating device 100 between the upper roller 1 and the middle roller 2. As it passes over the middle roller 2, it is preheated by the auxiliary heating device 30, and then pressed by the lower roller 3, enabling the product to be quickly formed on the forming equipment. When the lower roller 3 is a patterned roller, this sheet forming auxiliary heating device allows the embossing and forming to be completed in one step when the product is pressed between the middle roller 2 and the lower roller 3, saving processing time, improving production efficiency, and expanding the scope of application.

[0026] like Figure 3 As shown, the auxiliary heating device 30 includes: a heat insulation cover 4, a heat insulation layer 5, a heating component 6, and an opening and closing mechanism 7.

[0027] The heat insulation cover 4 is semi-circularly surrounding the outer side of the middle roller 2. The heat insulation cover 4 includes an outer cover 41, an inner cover 42 installed inside the outer cover 41, and a cooling channel 43 formed between the outer cover 41 and the inner cover 42. Cold water is circulated in the cooling channel 43 to reduce the temperature of the heat insulation cover 4, so as to prevent the temperature from being transferred to the outer cover 41 when the heating component 6 is heating and burn the operator who accidentally touches the heat insulation cover 4, thereby improving the safety of the operator.

[0028] like Figure 3 , 4 As shown, the cooling channel 43 includes a plurality of channel holes 431, which are distributed at intervals along the circumference of the middle roller 2, and each channel hole 431 extends in the left-right direction. The plurality of channel holes 431 are connected in sequence to form a unidirectional cooling channel. The cooling channel 43 is fluidly connected to an external cold water source through a pipeline, and cold water is circulated from the external cold water source to the cooling channel 43, effectively improving the cooling efficiency.

[0029] The insulation layer 5 is installed inside the inner cover 42. The insulation layer 5 is made of heat insulation material to reduce the heat transferred from the heating component 6 to the heat insulation cover 4. On the one hand, it avoids too much heat being transferred to the heat insulation cover 4 and burning the operator who accidentally touches it. On the other hand, it reduces the heat transfer of the heating component 6 and avoids heat waste, thereby improving the heat utilization rate of the heating component 6.

[0030] like Figure 3 , 5 As shown, the heating assembly 6 includes several heating tubes 61, several thermocouples 62, and a temperature control device (not shown in the figure). The heating tubes 61 and the thermocouples 62 are all installed inside the insulation layer 5. The heating tubes 61 are used to provide heat to heat the product that passes over the middle roller 2, and the thermocouples 62 are used to measure the surface temperature of the product that passes over the middle roller 2.

[0031] In this embodiment, several thermocouples 62 are distributed at intervals along the left-right direction to measure the temperature of the product in different areas along the left-right direction.

[0032] Several heating tubes 61 are divided into multiple heating groups, which are distributed sequentially along the left and right direction to heat the product in different areas along the left and right direction. Each heating group corresponds to a heating area, and each heating area is equipped with a thermocouple 62 to detect the temperature of the heating area. The heating tubes 61 of each heating group are arranged at intervals along the circumference of the middle roller 2.

[0033] The temperature control device is electrically connected to several heating tubes 61 and several thermocouples 62. The temperature control device receives the detection results fed back by each thermocouple 62 and adjusts the temperature of the heating tube 61 in the corresponding heating area according to the detection results.

[0034] The heating component 6 controls the surface temperature of the product passing over the middle roller 2 in a zone along the left and right direction, so that the surface temperature of the product is uniform, which is beneficial to the subsequent product forming and makes the product thickness uniform.

[0035] like Figure 2 , 3 As shown, the opening and closing mechanism 7 is installed between the heat insulation cover 4 and the frame 10. The opening and closing mechanism 7 includes a pair of cylinders 71 arranged opposite each other on the left and right. The cylinder body of each cylinder 71 is installed on the frame 10, and the end of the cylinder rod is connected to the outer shell 41 of the heat insulation cover 4. The pair of cylinders 71 can synchronously drive the heat insulation cover 4 to move back and forth along the radial direction of the middle roller 2 to adjust the distance between the auxiliary heating device 30 and the roller surface of the middle roller 2, so as to adapt to the molding of products of different thicknesses.

[0036] The opening and closing mechanism 7 also includes a pair of guide components 72, with each cylinder 71 equipped with one guide component 72. Each guide component 72 includes a guide post 721 extending radially along the middle roller 2 and a linear bearing 722 sleeved on the guide post 721. The guide post 721 is fixedly mounted on the frame 10, and the linear bearing 722 is connected to the heat insulation cover 4, with the linear bearing 722 slidingly engaged with the guide post 721. When the pair of cylinders 71 drive the heat insulation cover 4 to move, each linear bearing 722 slides along the corresponding guide post 721. The engagement between the linear bearing 722 and the guide post 721 provides guidance for the movement of the heat insulation cover 4, preventing the heat insulation cover 4 from deviating and damaging the products and rollers.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this application. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this application. Various changes and modifications can be made without departing from the spirit and scope of this application. The scope of protection claimed by this application is defined by the appended claims, specification, and their equivalents.

Claims

1. A sheet molding auxiliary heating device installed on a molding apparatus and disposed close to a roll cylinder of said molding apparatus, characterized by, The sheet forming auxiliary heating device includes: A heat shield, in a semi-circular shape, surrounds the outside of the roller. The heat shield includes an outer shell, an inner shell installed inside the outer shell, and a cooling channel formed between the outer shell and the inner shell, wherein cold water flows through the cooling channel. An insulation layer is installed on the inner side of the inner casing; A heating assembly includes several heating tubes, several thermocouples, and a temperature control device. The heating tubes and thermocouples are all installed inside the insulation layer, and the temperature control device is electrically connected to the heating tubes and thermocouples. An opening and closing mechanism is installed on the frame of the molding equipment and connected to the heat insulation cover. The opening and closing mechanism includes a pair of cylinders arranged opposite each other on the left and right sides. The pair of cylinders are connected to the outer shell of the heat insulation cover and are configured to synchronously drive the heat insulation cover to move back and forth along the radial direction of the roller.

2. The sheet forming auxiliary heating device according to claim 1, characterized in that, The cooling channel includes a plurality of channel holes, which are distributed at intervals along the circumference of the roller, and each channel hole is parallel to the axis of the roller. The plurality of channel holes are connected in sequence to form a unidirectional cooling channel.

3. The sheet forming auxiliary heating device according to claim 1, characterized in that, The insulation layer is made of heat-insulating material.

4. The sheet forming auxiliary heating device according to claim 1, characterized in that, The aforementioned thermocouples are arranged at intervals along the left-right direction.

5. The sheet forming auxiliary heating device according to claim 4, characterized in that, The aforementioned heating tubes are divided into multiple heating groups, which are arranged sequentially along the left-right direction. Each heating group is equipped with one thermocouple, and the heating tubes of each heating group are arranged at intervals along the arc of the heat insulation cover.

6. The sheet forming auxiliary heating device according to claim 1, characterized in that, The opening and closing mechanism further includes a pair of guide components, with each cylinder having one guide component. Each guide component includes a guide post extending radially along the roller and a linear bearing sleeved on the guide post. The guide post is fixedly mounted on the frame, and the linear bearing is connected to the heat insulation cover. The linear bearing is slidably engaged with the guide post.

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