Three-roller calender

Abstract

The utility model discloses a three-roller calender which comprises a machine frame, a roller assembly and an anti-scalding protection device, the roller assembly and the anti-scalding protection device are installed on the machine frame, and the machine frame comprises a pair of wall plates which are oppositely arranged left and right. The roller assembly comprises three rollers rotationally arranged between the pair of wallboards, three rotating joints connected with one ends of the three rollers correspondingly and three pipelines connected with the three rotating joints correspondingly, and the three rollers are parallel to one another and are sequentially arranged on the rack from top to bottom; each rotary joint is communicated with the interior of the corresponding roller and the corresponding pipeline, and the three rotary joints and the three pipelines are located on the outer sides of the pair of wallboards and located on the same side; the anti-scald protection device comprises a protection cover surrounding the outer sides of the three rotary joints and the three pipelines; the protective cover surrounds the outer sides of the rotary joint and the pipeline which are connected with the roller, so that an operator is protected when the operator observes the extrusion die, the operator is prevented from being scalded, the structure is simple, and the operation safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of plastic product production equipment, and in particular to a three-roller calender. Background Art

[0002] Since the roller is an important component of sheet film products, during the production process, liquid heat-conducting medium is passed through the inside of the roller. The heat-conducting medium enters the roller through the rotary joint and pipeline installed on the end face of the roller, and then circulates out of the roller through the rotary joint and pipeline. The operator moves the calender to a position that matches the mold, introduces the molten material between the middle roller and the lower roller, and then the material package wraps around the middle roller and enters the upper roller before being discharged. At this time, when the operator observes the thickness of the material discharged from the mold from the side, there is a risk of being burned by the rotary joint and pipeline on the side of the three rollers. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of this application is to provide a three-roller calender.

[0004] To achieve the above objectives, the present application adopts the following technical solution: a three-roll calender, comprising:

[0005] The frame includes a pair of wall panels arranged opposite to each other on the left and right sides;

[0006] a roller assembly comprising three rollers rotatably disposed between the pair of wall panels, three rotary joints respectively connected to one end of the three rollers, and three pipelines respectively connected to the three rotary joints, the three rollers being arranged parallel to each other and sequentially from top to bottom on the frame, each rotary joint communicating with the interior of the corresponding roller and the corresponding pipeline, the three rotary joints and the three pipelines being located outside the pair of wall panels and on the same side; and

[0007] The anti-scalding protection device is installed on the frame and includes a protection cover surrounding the three rotary joints and the outer sides of the three pipelines.

[0008] In the above technical solution, it is further preferred that the protective cover has an inspection port for exposing the three rotary joints and the three pipelines to the outside, and an inspection door is rotatably provided at the inspection port.

[0009] In the above technical solution, it is further preferred that the three rollers are respectively connected to three drive motors, each drive motor is connected to the other end of the corresponding roller, and the three drive motors are all located on the outside of the pair of wall panels and on the same side.

[0010] Compared with the prior art, this application achieves the following beneficial effects:

[0011] A protective cover is provided around the outside of the rotary joint and pipeline connected to the roller to protect the operator from being scalded when observing the extrusion die. The structure is simple and the operation safety is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 FIG. 7 is a schematic perspective view of a three-roll calender provided by an embodiment of the present application;

[0013] Figure 2 is Figure 1 a schematic structural view of the three-roll calender (excluding the anti-scald protection device) in

[0014] Figure 3 is Figure 1 the front view of the three-roll calender in

[0015] Wherein: 100, three-roll calender; 10, frame; 1, wallboard; 20, roller assembly; 2, upper roller; 3, middle roller; 4, lower roller; 5, first rotary joint; 6, second rotary joint; 7, third rotary joint; 8, first pipeline; 9, second pipeline; 10, third pipeline; 13, drive motor; 30, anti-scald protection device; 11, protective cover; 12, inspection door; 200, extrusion die. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] In order to describe in detail the technical content, structural features, achieved objectives and effects of the application, the technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all 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 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 shapes, structures and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment.

[0017] An embodiment of the present application provides a three-roll calender, as Figure 3 shown. The three-roll calender 100 is installed downstream of the extrusion die 200 to cool and shape the sheet extruded by the extrusion die 200. The three-roll calender 100 includes a frame 10 and a roller assembly 20 and an anti-scald protection device 30 installed on the frame 10.

[0018] As Figure 1 shown, the frame 10 includes a pair of wallboards 1 arranged opposite to each other on the left and right, and the roller assembly 20 is arranged on the pair of wallboards 1.

[0019] As Figure 1 , 2 shown, the roller assembly 20 includes an upper roller 2, a middle roller 3, a lower roller 4, a first rotary joint 5 connected to the upper roller 2, a second rotary joint 6 connected to the middle roller 3, a third rotary joint 7 connected to the lower roller 4, a first pipeline 8 communicating with the first rotary joint 5, a second pipeline 9 communicating with the second rotary joint 6, and a third pipeline 10 communicating with the third rotary joint 7. The upper roller 2, the middle roller 3, and the lower roller 4 all extend in the left-right direction and are arranged in sequence from top to bottom. Each roller is rotatably arranged between a pair of wall panels 1 around its own axis.

[0020] The first rotary joint 5 is connected between the upper roller 2 and the first pipeline 8 to connect the inside of the upper roller 2 and the first pipeline 8. The first pipeline 8 is communicated with a roller temperature control machine. The first pipeline 8 is in circular communication with the upper roller 2 through the first rotary joint 5. The first rotary joint 5 ensures that while the upper roller 2 is rotating, the first pipeline 8 can receive the medium output from the upper roller 2 and continuously introduce a constant-temperature medium into the upper roller 2, thereby adjusting the roller surface temperature of the upper roller 2.

[0021] The second rotary joint 6 is connected between the middle roller 3 and the second pipeline 9 to connect the inside of the middle roller 3 and the second pipeline 9. The second pipeline 9 is communicated with the roller temperature control machine. The second pipeline 9 is in circular communication with the middle roller 3 through the second rotary joint 6. The second rotary joint 6 ensures that while the middle roller 3 is rotating, the second pipeline 9 can receive the medium output from the middle roller 3 and continuously introduce a constant-temperature medium into the middle roller 3, thereby adjusting the roller surface temperature of the middle roller 3.

[0022] The third rotary joint 7 is connected between the lower roller 4 and the third pipeline 10 to connect the inside of the lower roller 4 and the third pipeline 10. The third pipeline 10 is communicated with the roller temperature control machine. The third pipeline 10 is in circular communication with the lower roller 4 through the third rotary joint 7. The third rotary joint 7 ensures that while the lower roller 4 is rotating, the third pipeline 10 can receive the medium output from the lower roller 4 and continuously introduce a constant-temperature medium into the lower roller 4, thereby adjusting the roller surface temperature of the lower roller 4.

[0023] The first rotary joint 5, the second rotary joint 6, the third rotary joint 7, the first pipeline 8, the second pipeline 9, and the third pipeline 10 are all located outside a pair of wall panels 1 and on the outside of the same wall panel 1, so as to facilitate the maintenance of the rotary joints and pipelines by the staff.

[0024] The anti-scalding protection device 30 includes a protective cover 11 installed on the frame 10. The protective cover 11 surrounds the outside of the first rotary joint 5, the second rotary joint 6, the third rotary joint 7, the first pipeline 8, the second pipeline 9 and the third pipeline 10 to prevent the operator from being burned by the rotary joints and pipelines when observing the extrusion die.

[0025] The protective cover 11 is provided with an inspection port for the operator to observe and inspect the rotary joint and pipeline. An inspection door 12 is also rotatably installed at the inspection port. The inspection door 12 can open and close the inspection port. The inspection door 12 opens the inspection port when inspecting the rotary joint and pipeline, and closes the inspection port when observing the extrusion mold 200.

[0026] The upper roller 2, the middle roller 3 and the lower roller 4 are respectively connected to a drive motor 13. The upper roller 2, the middle roller 3 and the lower roller 4 are respectively driven by the corresponding drive motor 13 to rotate around their own axis, and the rotation speed of the roller is adjusted by the corresponding drive motor 13.

[0027] The rotary joint and the pipeline are located at one end of the three rollers, and the drive motor 13 is located at the other end of the three rollers. The drive motor 13 is installed away from the rotary joint and the pipeline to avoid affecting each other's work.

[0028] 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 to the above embodiments. The above embodiments and descriptions are only for illustrative purposes. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. The scope of protection claimed in the present application is defined by the appended claims, the description and their equivalents.

Claims

1. A three-roll calender, characterized in that, include: The frame includes a pair of wall panels arranged opposite to each other on the left and right sides; A roller assembly comprising three rollers rotatably disposed between the pair of wall panels, three rotary joints respectively connected to one end of the three rollers, and three pipelines respectively connected to the three rotary joints, wherein the three rollers are arranged parallel to each other and sequentially from top to bottom on the frame, each rotary joint communicating with the interior of the corresponding roller and the corresponding pipeline, and the three rotary joints and the three pipelines are located outside the pair of wall panels and on the same side; and The anti-scalding protection device is installed on the frame and includes a protection cover surrounding the three rotary joints and the outer sides of the three pipelines.

2. The three-roll calender according to claim 1, characterized in that, The protective cover is provided with an inspection port for exposing the three rotary joints and the three pipelines to the outside, and an inspection door is rotatably provided at the inspection port.

3. The three-roll calender according to claim 1, wherein, The three rollers are respectively connected to three driving motors, and each driving motor is connected to the other end of the corresponding roller. The three driving motors are all located on the outside of the pair of wall panels and on the same side.

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