Anti-shrinkage device for film forming

Abstract

The anti-shrinkage device is arranged between an extrusion die and forming equipment, an extrusion channel for conveying a film blank is formed between an extrusion opening of the extrusion die and the forming equipment, and the extrusion channel extends in the vertical direction. The anti-shrinkage device comprises a pair of supporting assemblies oppositely arranged on the forming equipment in the transverse direction, a cooling module arranged at the end, close to the extrusion channel, of the longitudinal support and a heating module located on the side, close to the extrusion channel, of the cooling module. The supporting assembly comprises a vertical support extending vertically and a longitudinal support extending longitudinally, and the longitudinal support can move in the vertical direction and the longitudinal direction relative to the vertical support. The cooling module is used for reducing the temperature of the supporting assembly; the heating module is used for heating the film blank conveyed in the extrusion channel; the distance between the heating module and the extruded film blank can be adjusted, the heating effect is controlled, the film blank is prevented from being shrunk when cooled, and the width of the finally formed film is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of plastic production equipment, and in particular to an anti-shrinkage device for film molding. Background Art

[0002] Since EVA photovoltaic film is an important component of solar panels, it is mainly used for glass interlayer and has good adhesion, durability, optical properties and other characteristics. EVA resin is a thermoplastic polymer material with a linear molecular chain structure and the characteristics of thermal expansion and contraction. The melt coming out of the mold outlet shrinks when it enters the roller casting machine for molding, resulting in uneven material flow. The width of the final film is not enough and needs to be re-produced, increasing production costs and production time. Summary of the invention

[0003] In order to solve the problem in the prior art that the melt output from the mold shrinks severely, resulting in insufficient product width, the purpose of the present application is to provide an anti-shrinkage device for film molding.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solution: an anti-shrinkage device for film forming, arranged between an extrusion die and a forming device, an extrusion channel for conveying film blanks is formed between the extrusion port of the extrusion die and the forming device, the extrusion channel extends in a vertical direction, the anti-shrinkage device is arranged on one side of the extrusion channel, and the anti-shrinkage device comprises: A pair of support assemblies, arranged on the molding device in a transverse direction perpendicular to the vertical direction, each of the support assemblies comprises a vertical bracket extending in the vertical direction and a longitudinal bracket extending in a longitudinal direction perpendicular to the vertical direction, and the longitudinal bracket is configured to be movable relative to the vertical bracket in the vertical direction and the longitudinal direction; A cooling module is arranged at one end of the longitudinal support close to the extrusion channel, and the cooling module is used to reduce the temperature of the pair of support components; and The heating module is located on a side of the cooling module close to the extrusion channel, and the heating module is used to heat the film blank transported in the extrusion channel.

[0005] In the above technical solution, it is further preferred that the cooling module includes a cooling pipeline for conveying cooling medium, and the cooling pipeline surrounds the outer side of the heating module and is arranged to avoid the area between the heating module and the extrusion channel.

[0006] In the above technical solution, it is further preferred that the cooling module also includes a heat insulation cover arranged between the heating module and the support assembly, the heat insulation cover is arranged at an end of the longitudinal bracket close to the extrusion channel, the cooling pipeline is formed in the heat insulation cover, the heat insulation cover has an opening facing the extrusion channel, and the heating module is arranged at the opening.

[0007] In the above technical solution, it is further preferred that the heating module includes at least one heating tube, and the at least one heating tube is installed at the opening.

[0008] In the above technical solution, it is further preferred that the at least one heating tube is an infrared radiation heating tube.

[0009] In the above technical solution, it is further preferred that each of the heating tubes extends along the transverse direction, and a size of the heating tube in the transverse direction is larger than a size of the extrusion port in the transverse direction.

[0010] In the above technical solution, it is further preferred that the vertical bracket is provided with a first waist groove extending along the vertical direction, and the longitudinal bracket is provided with a second waist groove extending along the longitudinal direction, and each of the support components also includes an adjustment member connecting the longitudinal bracket and the transverse bracket, and the adjustment member is simultaneously inserted into the corresponding first waist groove and the second waist groove.

[0011] Compared with the prior art, the present invention has the following beneficial effects: The anti-shrinkage device of the present application can adjust the distance between the heating module and the extruded film blank, control the heating effect, heat and keep the extruded film blank warm, avoid the film blank shrinking when cold and affecting the width of the formed film, ensure the width of the final formed film, and improve the quality of the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of a three-dimensional structure of an anti-shrinkage device provided in an embodiment of the present application installed on a molding device; Figure 2 for Figure 1 A schematic diagram of a structure in which the anti-shrinkage device is arranged on one side of the extrusion channel; Figure 3 for Figure 2 Schematic diagram of the structure of the anti-shrinkage device.

[0013] Among them: 10, anti-shrinkage device; 1, support assembly; 11, vertical bracket; 111, first waist groove; 12, longitudinal bracket; 121, second waist groove; 13, adjustment piece; 2, cooling module; 21, heat insulation cover; 22, cooling pipeline; 221, cooling through hole; 23, opening; 3, heating module; 31, heating tube; 20, extrusion die; 30, molding equipment; 40, extrusion channel. DETAILED DESCRIPTION

[0014] To describe the technical content, structural features, achieved purpose and effect of the application in detail, the technical solutions in the embodiments of the application will be described below in conjunction with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all of the embodiments. In the following description, for the purpose of explanation, many 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 the case of one or more equivalent arrangements. In addition, various exemplary embodiments may be different, but not necessarily exclusive. For example, without departing from the inventive concept, the specific shape, structure and characteristics of the exemplary embodiment may be used or implemented in another exemplary embodiment.

[0015] In the following, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0016] The “vertical direction” mentioned in this application is Figure 1 The vertical direction is as shown in the attached Figure 1 The front-to-back direction shown in the figure, the "lateral direction" mentioned in the figure is as follows: Figure 1 Left and right directions shown.

[0017] In the present application, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0018] The present application embodiment provides an anti-shrinkage device for film forming, such as Figure 1 , 2As shown, the anti-shrinkage device 10 is used for film production and is arranged between an extrusion die 20 for extruding a film blank and a molding device 30 for cooling and shaping the film blank. The molding device 30 is arranged below the extrusion die 20. An extrusion channel 40 extending in the up-down direction is formed between the extrusion port of the extrusion die 20 and the molding device 30. The extrusion die 20 extrude the film blank vertically downward, and the film blank is transported to the molding device 30 via the extrusion channel 40. The anti-shrinkage device 10 is arranged on the front side or the rear side of the extrusion channel 40. In the embodiment of the present application, the anti-shrinkage device 10 is located on the front side of the extrusion channel 40.

[0019] like Figure 1 , 3 As shown, the anti-shrinkage device 10 includes a pair of support components 1 and a cooling module 2 and a heating module 3 arranged on the pair of support components 1. The pair of support components 1 are fixedly connected to the molding equipment 30 relatively to the left and right; each support component 1 includes a vertical bracket 11 extending in the up-down direction and a longitudinal bracket 12 extending in the front-to-back direction and an adjusting member 13 connecting the vertical bracket 11 and the longitudinal bracket 12; the bottom of the vertical bracket 11 is fixedly connected to the molding equipment 30, and the vertical bracket 11 is provided with a first waist groove 111 extending in the up-down direction, and the longitudinal bracket 12 is provided with a second waist groove 121 extending in the front-to-back direction, and the adjusting member 13 is simultaneously passed through the corresponding first waist groove 111 and the second waist groove 121. The adjusting member 13 has a locked state and an unlocked state. When the adjusting member 13 is in the unlocked state, the adjusting member 13 can move along the first waist groove 111 and the second waist groove 121, and the longitudinal bracket 12 can move simultaneously along the front-to-back direction and the up-and-down direction relative to the vertical bracket 11; when the adjusting member 13 is in the locked state, the adjusting member 13 fixes the corresponding longitudinal bracket 12 and the vertical bracket 11, and the longitudinal bracket 12 is locked on the vertical bracket 11 and cannot move relative to the vertical bracket 11.

[0020] The cooling module 2 is fixedly connected between one end of a pair of longitudinal brackets 12 close to the extrusion channel 40. The cooling module 2 includes a heat insulation cover 21 and a cooling pipeline 22 arranged in the heat insulation cover 21. The heat insulation cover 21 extends in the left-right direction, and the cross-section of the heat insulation cover 21 is arc-shaped with the opening 23 facing the extrusion channel 40. The heating module 3 is arranged at the opening 23. When the heating module 3 performs heating work, the temperature of the heat insulation cover 21 increases. The cooling pipeline 22 arranged on the heat insulation cover 21 is used to transport the cooling medium to take away the heat on the heat insulation cover 21, thereby reducing the temperature of the heat insulation cover 21 and the support assembly 1 connected to the heat insulation cover 21, and preventing the support assembly 1 from being deformed due to heat and affecting the operation of the heating module 3. The cooling pipeline 22 includes a plurality of cooling holes 221 that penetrate the heat insulation cover 21 and a pair of longitudinal brackets 12 in the left-right direction. The plurality of cooling holes 221 are arranged in sequence along the curvature of the heat insulation cover and avoid the position between the heating module 3 and the extrusion channel 40. Each cooling hole 221 forms an inlet for the input of the cooling medium on one of the longitudinal brackets 12, and forms an outlet for the output of the cooling medium on the other longitudinal bracket 12. The cooling medium enters the heat insulation cover 21 from the inlet, exchanges heat with the heat insulation cover 21, and takes away the heat from the outlet, thereby reducing the temperature of the heat insulation cover 21 and the longitudinal brackets 12, and avoiding the heat of the heating module 3 being transferred to the support assembly 1 during operation, causing the support assembly 1 to deform.

[0021] The heating module 3 is used to heat the film blank in the extrusion channel 40, maintain the temperature of the film blank during extrusion, and prevent the film blank from shrinking when it is cold before entering the molding device 30, thereby affecting the width of the film after final molding. The heating module 3 includes at least one heating tube 31 to dissipate heat to the extrusion channel 40. In the embodiment of the present application, the heating module 3 has two heating tubes 31, and both heating tubes 31 are infrared radiation heating tubes; the two heating tubes 31 are sequentially arranged at the opening 23 of the heat insulation cover 21 in the up and down directions to heat the film blank. The size of each heating tube 31 in the left and right directions is larger than the size of the extrusion port in the left and right directions, so as to avoid that the left and right sides of the film blank do not have sufficient temperature insulation when being extruded; the heating tube 31 fully heats and insulates the film blank in the left and right directions, effectively preventing the film blank from shrinking when it is cold.

[0022] like Figure 1-3As shown, the heating module 3 is arranged at the opening 23 of the heat insulation cover 21, and the cooling module 2 moves with the longitudinal bracket 12. The corresponding longitudinal bracket 12 and the vertical bracket 11 are unlocked by the adjusting member 13, and the longitudinal bracket 12 can move forward and backward and up and down relative to the vertical bracket 11. The heating module 3 moves with the longitudinal bracket 12, and the distance between the extrusion port and the extrusion channel 40 can be adjusted to achieve the control of the heating effect, effectively prevent the film blank from shrinking, ensure the width of the final formed film, and improve the quality of the film; and the cooling tube portion 22 surrounds the outside of the heating module 3, blocking between the heating module 3 and the support assembly 1, so as to prevent the heat dissipated by the heating module 3 from causing deformation of the support assembly and thus damaging the heating tube 31, thereby ensuring the stability of the anti-shrinkage device 10.

[0023] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, and the scope of protection required by the present application is defined by the attached claims, description and their equivalents.

Claims

1. An anti-shrinkage device for film forming, arranged between an extrusion die and a forming device, an extrusion channel for conveying film blanks is formed between the extrusion port of the extrusion die and the forming device, the extrusion channel extends in a vertical direction, the anti-shrinkage device is arranged on one side of the extrusion channel, characterized in that: The anti-shrinkage device comprises: A pair of support assemblies, arranged on the molding device in a transverse direction perpendicular to the vertical direction, each of the support assemblies comprises a vertical bracket extending in the vertical direction and a longitudinal bracket extending in a longitudinal direction perpendicular to the vertical direction, and the longitudinal bracket is configured to be movable relative to the vertical bracket in the vertical direction and the longitudinal direction; A cooling module is arranged at one end of the longitudinal support close to the extrusion channel, and the cooling module is used to reduce the temperature of the pair of support components; and The heating module is located on a side of the cooling module close to the extrusion channel, and the heating module is used to heat the film blank transported in the extrusion channel.

2. The anti-shrinkage device according to claim 1, characterized in that: The cooling module comprises a cooling pipeline for conveying cooling medium, and the cooling pipeline surrounds the outer side of the heating module and is arranged to avoid the area between the heating module and the extrusion channel.

3. The anti-shrinkage device according to claim 2, characterized in that: The cooling module also includes a heat shield arranged between the heating module and the support assembly, the heat shield is arranged at one end of the longitudinal bracket close to the extrusion channel, the cooling pipeline is formed in the heat shield, the heat shield has an opening facing the extrusion channel, and the heating module is arranged at the opening.

4. The anti-shrinkage device according to claim 3, characterized in that: The heating module comprises at least one heating tube, and the at least one heating tube is mounted at the opening.

5. The anti-shrinkage device according to claim 4, characterized in that: The at least one heating tube is an infrared radiation heating tube.

6. The anti-shrinkage device according to claim 4, characterized in that: Each of the heating tubes extends along the transverse direction, and a size of the heating tube in the transverse direction is greater than a size of the extrusion port in the transverse direction.

7. The anti-shrinkage device according to claim 1, characterized in that: The vertical bracket is provided with a first waist groove extending along the vertical direction, and the longitudinal bracket is provided with a second waist groove extending along the longitudinal direction. Each of the support assemblies also includes an adjustment member connecting the longitudinal bracket and the transverse bracket, and the adjustment member is simultaneously inserted into the corresponding first waist groove and the second waist groove.

Images