Three-roller calender
By designing the limit assembly in the three-roller calender, the limit position of the movement of the three-roller is achieved by using the coordination of the limit seat and the contact switch, the problem of the three-roller malfunction and hitting the mold is solved, ensuring work safety and sensitivity of limit response.
Patent Information
- Application Number
- CN202421844196.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-01
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-08-01
AI Technical Summary
During the start-up process of the three-roller calender, if the mold position is not matched at the time, the three-roller may operate erroneously, causing the middle roller to hit the mold, causing safety hazards.
A three-roll calender with sensitive limits is designed, using multiple limit components, including limit seats and contact switches. Through the coordination of the limit seats and contact switches, the limit of movement of the three-roller machine is achieved to avoid collision between the roller and the mold.
It effectively avoids collision between the roller and the mold, ensures work safety, and the limit switch is sensitive to response and continuous action.
Smart Images
Figure CN222858584U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of plastic sheet production equipment, and in particular to a three-roll calender. Background Art
[0002] In the sheet production process, the three-roll calender is used to calender the sheet, which plays an important role in the forming of the sheet. During the production process, after the mold adjustment is completed, the operator moves the calender to a position that matches the mold. Since the diameter of the middle roll of the three-roll machine is larger than the diameter of the front roll, when the mold enters between the front roll and the middle roll, the three-roll machine needs to stop moving. The movement is controlled by manual buttons. When the operator misoperates, the three rolls continue to move toward the mold. The diameter of the middle roll is larger than the front roll, and the position of the mold is higher than the front roll but lower than the highest point of the middle roll. Continuing to move will cause the middle roll to hit the mold. Summary of the invention
[0003] In order to solve the above technical problems, the purpose of this application is to provide a three-roll calender with sensitive limit and safe operation.
[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: a three-roll calender, comprising:
[0005] A guide rail extending in a front-rear direction;
[0006] A rack, movably mounted on the guide rail and configured to be able to move along the guide rail;
[0007] Three calender rollers are rotatably arranged on the frame in sequence along the front-rear direction;
[0008] A moving wheel system, installed at the bottom of the frame, the moving wheel system includes a plurality of moving wheels rotatably arranged at the bottom of the frame, each of the moving wheels cooperates with the guide rail;
[0009] A driving motor is connected to the moving wheel train to drive the moving wheel train to drive the frame to move along the guide rail; and
[0010] A plurality of limit assemblies are respectively arranged on the front and rear sides of the frame, each of the limit assemblies comprises a limit seat mounted on the guide rail and a contact switch connected to the drive motor phase signal, each of the contact switches is mounted on the moving wheel train and moves with the moving wheel train, and each of the contact switches is configured to be triggered when in contact with the limit seat.
[0011] In the above technical solution, it is further preferred that each of the limit seats is installed on the upper end surface of the guide rail and is located on the moving path of the corresponding contact switch.
[0012] In the above technical solution, it is further preferred that the contact switch is a rocker-type contact switch.
[0013] In the above technical solution, it is further preferred that the three calendering rollers include a front roller, a middle roller and a rear roller, the middle roller is located between the front roller and the rear roller, and the diameters of the rear roller and the middle roller are consistent, and the diameter of the front roller is smaller than the diameter of the middle roller.
[0014] In the above technical solution, it is further preferred that the front roller and the rear roller are movably arranged on the frame along the front-rear direction.
[0015] Compared with the prior art, the present invention has the following beneficial effects:
[0016] The limit switch of the present application is used to limit the movement of the three-roll calender to avoid collision between the rollers and the extrusion die, thereby ensuring working safety, and the limit switch is sensitive in response and continuous in action. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic diagram of the three-roller calender provided in an embodiment of the present application;
[0018] Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A;
[0019] Figure 3 for Figure 1 The front view of the three-roll calender in FIG.
[0020] Figure 4 for Figure 3 A partial enlarged schematic diagram of point B in the middle;
[0021] Figure 5 for Figure 1 Top view of the three-roll calender in Figure 1.
[0022] Among them: 100, three-roll calender; 1, guide rail; 2, frame; 3, moving wheel system; 31, moving wheel; 4, limit assembly; 41, limit seat; 42, contact switch; 51, front roller; 52, middle roller; 53, rear roller; 61, fixed bearing seat; 62, sliding bearing seat; 63, adjusting cylinder; 7, driving motor; 200, extrusion die. DETAILED DESCRIPTION
[0023] 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.
[0024] The “front” and “back” mentioned in this application are as follows: Figure 1 Before and after shown.
[0025] An embodiment of the present application provides a three-roll calender, which moves to the bottom of the extrusion die and calenders the sheet extruded by the extrusion die to form the sheet.
[0026] like Figure 1 , 2 As shown, the three-roll calender 100 includes a guide rail 1 extending in the front-to-back direction, a frame 2 movably mounted on the guide rail 1, three calender rollers rotatably arranged on the frame 2, a moving wheel train 3 arranged at the bottom of the frame 2, and a plurality of limit assemblies 4 respectively arranged on the front and rear sides of the frame 2.
[0027] like Figure 3 As shown, the guide rail 1 is arranged on the ground and at least partially extends to the lower side of the extrusion die 200 .
[0028] like Figure 1 , 3 As shown in Figures 5 and 6, the three calender rollers include a front roller 51, a middle roller 52 and a rear roller 53 which are arranged in sequence from front to back. The front roller 51, the middle roller 52 and the rear roller 53 all extend in the left-right direction. The middle roller 52 is arranged on the top of the frame 2 so as to be rotatable around its own axis through a pair of fixed bearing seats 61. The front roller 51 and the rear roller 53 are arranged on the top of the frame 2 so as to be rotatable around their own axis through a pair of sliding bearing seats 62 and to be slidable in the front-to-back direction. The frame 2 is also provided with an adjusting cylinder 63 which pushes the sliding bearing seat 62 to move in the front-to-back direction. The front roller 51 and the rear roller 53 are respectively moved in the front-to-back direction under the drive of the adjusting cylinder 63 to adjust the distance between them and the middle roller 52. The diameters of the middle roller 52 and the rear roller 53 are consistent, and the diameter of the front roller 51 is smaller than that of the middle roller 52, so that the extrusion die 200 can pass over the front roller 51 when the three-roll calender 100 moves from back to front, so that the extrusion port of the extrusion die 200 faces between the front roller 51 and the middle roller 52.
[0029] The moving wheel train 3 includes a plurality of moving wheels 31 rotatably arranged at the bottom of the frame 2, and each moving wheel 31 cooperates with the guide rail 1 so as to be able to roll back and forth along the guide rail 1. The moving wheel train 3 is in transmission connection with a driving motor 7, and the driving motor 7 is used to drive the plurality of moving wheels 31 of the moving wheel train 3 to rotate synchronously, so as to realize driving the frame 2 and the three calender rollers carried on the frame 2 to move back and forth along the guide rail 1, so as to adjust the position of the extrusion port of the extrusion die 200 on the three-roller calender 100, so that the sheet extruded by the extrusion die 200 can be cast between the front roller 51 and the middle roller 52.
[0030] like Figure 1-4 As shown, a plurality of limit assemblies 4 are used to limit the moving position of the rack 2 on the guide rail 1. Each limit assembly 4 includes a limit seat 41 installed on the guide rail 1 and a contact switch 42 connected to the drive motor 7 by signal. The contact switch 42 is configured to be triggered when it contacts the limit seat 41, and the drive motor 7 stops working when any contact switch 42 is triggered. The contact switch 42 of the limit assembly 4 located on the front side of the rack 2 is installed just in front of the front moving wheel 31, and the contact switch 42 of the limit assembly 4 located on the rear side of the rack 2 is installed just behind the rear moving wheel 31, and each contact switch 42 is installed adjacent to the corresponding moving wheel 31. In the embodiment of the present application, the contact switch 42 is a rocker-type contact switch.
[0031] Each stopper 41 is installed on the upper end surface of the guide rail 1 and is located on the moving path of the corresponding contact switch 42. When the three-roll calender 100 moves forward, the stopper 41 on the front side of the frame 2 is used to prevent the middle roller 52 from colliding with the extrusion die 200; when the three-roll calender 100 moves backward, the stopper 41 on the rear side of the frame 2 is used to prevent the three-roll calender 100 from derailing.
[0032] The drive motor 7 is also connected to a controller 8 by signal. The operator can control the operation of the drive motor through the controller 8. The operator controls the operation of the drive motor 7 through the controller 8, so that the three-roll calender 100 moves from back to front. When the extrusion die 200 passes over the front roller 51, the three-roll calender 100 is controlled to slow down the movement speed until the extrusion port of the extrusion die 200 moves to the desired position. The limit assembly 4 is used to prevent the operator from operating incorrectly.
[0033] The limit switch of the present application is used to limit the movement of the three-roll calender to avoid collision between the rollers and the extrusion die, thereby ensuring working safety, and the limit switch is sensitive in response and continuous in action.
[0034] 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. A three-roll calender, characterized in that: include: A guide rail extending in a front-rear direction; A rack, movably mounted on the guide rail and configured to be able to move along the guide rail; Three calender rollers are rotatably arranged on the frame in sequence along the front-rear direction; A moving wheel system, installed at the bottom of the frame, the moving wheel system includes a plurality of moving wheels rotatably arranged at the bottom of the frame, each of the moving wheels cooperates with the guide rail; A driving motor is connected to the moving wheel train to drive the moving wheel train to drive the frame to move along the guide rail; as well as A plurality of limit assemblies are respectively arranged on the front and rear sides of the frame, each of the limit assemblies comprises a limit seat mounted on the guide rail and a contact switch connected to the drive motor phase signal, each of the contact switches is mounted on the moving wheel train and moves with the moving wheel train, and each of the contact switches is configured to be triggered when in contact with the limit seat.
2. The three-roll calender according to claim 1, characterized in that: Each of the limit seats is installed on the upper end surface of the guide rail and is located on the moving path of the corresponding contact switch.
3. The three-roll calender according to claim 2, characterized in that: The contact switch is a rocker-type contact switch.
4. The three-roll calender according to claim 1, characterized in that: The three calendering rollers include a front roller, a middle roller and a rear roller. The middle roller is located between the front roller and the rear roller, and the diameters of the rear roller and the middle roller are consistent. The diameter of the front roller is smaller than that of the middle roller.
5. The three-roll calender according to claim 4, characterized in that: The front roller and the rear roller are movably arranged on the frame along the front-rear direction.