Open mill with various safety protection devices
By designing safety protection devices such as hand-push protection devices, foot-kick protection devices, and emergency stop buttons on the open mill, the problem of high safety risks in traditional open mills has been solved, enabling rapid emergency shutdown and reducing the accident rate.
Patent Information
- Application Number
- CN202520137936.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-01-20
AI Technical Summary
Traditional open mills lack effective safety devices, resulting in high safety risks during operation and a high risk of accidents.
Multiple safety protection devices were designed, including a push protection device, a kick protection device, and an emergency stop button. These devices are electrically connected to the drive unit via sensors to achieve rapid braking of the front and rear rollers, ensuring that the equipment stops operating immediately.
By setting up multiple protective devices, the front and rear rollers can be braked quickly, reducing the risk of accidents and improving operational safety.
Smart Images
Figure CN223864072U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of open mill technology, and specifically to an open mill with multiple safety protection devices. Background Technology
[0002] An open mixing mill, also known as an open rubber mixing mill or open compounding mill, is mainly used for the plasticizing and mixing of polymer materials such as rubber and plastics. It primarily consists of two large, parallel steel rollers that rotate in opposite directions at different speeds. When raw materials pass through the gap between these two rollers, they are subjected to pressure and shearing forces from the rollers, thus achieving plasticizing and mixing.
[0003] Traditional open mills lack effective protective devices, posing a high safety risk during operation and easily leading to accidents. Summary of the Invention
[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a two-roll mill with multiple safety protection devices.
[0005] To achieve the above objectives, the specific solution of this utility model is as follows: A two-roll mill with multiple safety protection devices includes a worktable and two work frames both disposed on the worktable; a front roller and a rear roller are disposed between the two work frames; it also includes a drive device for rotating the front roller and the rear roller; a first hand-push protection device is disposed in front of the worktable; the first hand-push protection device includes a first push rod, a first hand-push sensor, and two parallel first connecting arms; the first connecting arms are disposed in front of the worktable; the two ends of the first push rod are slidably connected to the two first connecting arms respectively; the first hand-push sensor is used to determine the position of the first push rod; a first emergency stop button is disposed in front of each of the two work frames; the first emergency stop button and the first hand-push sensor are both electrically connected to the drive device.
[0006] Furthermore, the first push sensor is a contact switch.
[0007] Furthermore, each of the two first connecting arms is provided with a first sliding groove; each first sliding groove is provided with a first guide rod; both ends of the first push rod are respectively connected to the front ends of the two first guide rods; a first mounting block is passed through the end of each first guide rod; a first return spring is sleeved on each first guide rod; one end of the first return spring is connected to the first push rod; the other end of the first return spring is connected to the first mounting block; and the first push sensor is located at the end of the first sliding groove.
[0008] Furthermore, each of the two first chute grooves is provided with a protective cover.
[0009] Furthermore, a second emergency stop button is provided at the rear of both workbenches; the second emergency stop button is electrically connected to the drive device.
[0010] Furthermore, a first baffle is provided in front of the front roller; a second baffle is provided behind the rear roller; the two ends of the first baffle are detachably connected to the two work frames respectively; the two ends of the second baffle are detachably connected to the two work frames respectively.
[0011] Furthermore, a second push protection device is provided at the rear of the worktable; the second push protection device includes a second push rod, a second push sensor, and two parallel second connecting arms; the second connecting arms are located at the rear of the worktable; the two ends of the second push rod are slidably connected to the two second connecting arms respectively; the second push sensor is used to determine the position of the second push rod; the second push sensor is electrically connected to the drive device.
[0012] Furthermore, both of the work frames are provided with mounting bases; each mounting base is provided with an adjusting rod; and the free end of each adjusting rod is provided with a baffle.
[0013] Furthermore, the open mill is also equipped with two kick protection devices; each kick protection device includes a kick gate, a kick sensor, four guide posts, and four mounting plates; each kick sensor is electrically connected to the drive device for detecting the position of the kick gate; the four corners of each kick gate are respectively connected to the four mounting plates via four guide bolts; each guide bolt is fitted with a third return spring; one end of the third return spring is connected to the kick gate; the other end of the third return spring is connected to the mounting plate; in one kick protection device, its kick sensor and the four mounting plates are all installed on the front side of the bottom of the worktable; in the other kick protection device, its kick sensor and the four mounting plates are all installed on the rear side of the bottom of the worktable.
[0014] The beneficial effects of this utility model are: by setting multiple protective devices, the front and rear rollers can be braked quickly, ensuring that the equipment stops running immediately and reducing the risk of accidents. Attached Figure Description
[0015] The utility model will be further described with reference to the accompanying drawings, but the embodiments in the drawings do not constitute any limitation on the present utility model. For those skilled in the art, other drawings can be obtained based on the following drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention from another perspective;
[0018] Figure 3 This is a schematic diagram of the structure of the first hand-push protection device of this utility model;
[0019] Figure 4 A schematic diagram of the structure of the first hand-push protection device to conceal the protective cover and one of the first connecting arms;
[0020] Figure 5 This is a schematic diagram of the overall structure of the present invention, showing the concealment of one of the kick-door panels.
[0021] The components are as follows: 10. Workbench; 11. Work frame; 12. Front roller; 13. Rear roller; 14. Drive device; 15. First emergency stop button; 16. Second emergency stop button; 2. First hand-push protection device; 21. First push rod; 22. First hand-push sensor; 23. First connecting arm; 25. First slide groove; 26. First guide rod; 27. First mounting block; 28. First return spring; 29. Protective cover; 31. First baffle; 32. Second baffle; 4. Second hand-push protection device; 51. Mounting base; 52. Adjusting rod; 53. Baffle; 61. Kick door panel; 62. Kick sensor; 63. Mounting plate. Detailed Implementation
[0022] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention. It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.
[0023] like Figure 1-5As shown, this embodiment of an open mill with multiple safety protection devices includes a worktable 10 and two work frames 11, each mounted on the worktable 10; a front roller 12 and a rear roller 13 are provided between the two work frames 11; it also includes a drive device 14 for rotating the front roller 12 and the rear roller 13; a first hand-push protection device 2 is provided in front of the worktable 10; the first hand-push protection device 2 includes a first push rod 21, a first hand-push sensor 22, and two parallel first connecting arms 23; the first connecting arms 23 are located in front of the worktable 10; the two ends of the first push rod 21 are slidably connected to the two first connecting arms 23 respectively; the first hand-push sensor 22 is used to determine the position of the first push rod 21; a first emergency stop button 15 is provided in front of each of the two work frames 11; the first emergency stop button 15 and the first hand-push sensor 22 are both electrically connected to the drive device 14.
[0024] Specifically, the drive device 14 can make the front roller 12 and the rear roller 13 rotate towards each other, and can control the rotation speed of the front roller 12 and the rear roller 13 respectively, as well as the distance between them.
[0025] In case of an emergency (such as when a foreign object is caught), press the first emergency stop button 15. The first emergency button sends a signal to the drive device 14, which immediately stops the front roller 12 and the rear roller 13 from rotating. When the first stop button is pressed again, the drive device 14 immediately makes the front roller 12 and the rear roller 13 rotate in the opposite direction, which can quickly handle the emergency.
[0026] Similarly, in an emergency, the first push rod 21 is pushed first, moving along the first connecting arm 23. This action is detected by the first hand-push sensor 22. Due to the interaction between the drive device 14 and the first hand-push sensor 22, the drive device 14 immediately stops the front roller 12 and the rear roller 13 from rotating. Furthermore, when the operator presses the first push rod 21 again and holds it down, the first hand-push sensor 22 senses this action and sends a signal to the drive device 14. The drive device 14 then reverses the rotation of the front roller 12 and the rear roller 13 to prevent foreign objects from being caught. Since the first hand-push sensor 22 is located on the workbench 10, very close to the operator's work area, it does not obstruct the operator's normal work. In an emergency, the operator can immediately push the push rod to quickly brake the front roller 12 and the rear roller 13, ensuring the equipment stops immediately and reducing the risk of accidents.
[0027] like Figure 1-5As shown in this embodiment, an open mill with multiple safety protection devices is described. The first hand-push sensor 22 is a contact switch. A contact switch is a mechanical sensor that detects changes in the position of an object through physical contact and generates an electrical signal based on these changes, ensuring stable signal transmission and safety.
[0028] like Figure 1-5 As shown, in this embodiment, a two-roll mill with multiple safety protection devices is provided. Each of the two first connecting arms 23 is provided with a first groove 25; each first groove 25 is provided with a first guide rod 26; both ends of the first push rod 21 are respectively connected to the front ends of the two first guide rods 26; a first mounting block 27 is passed through the end of each first guide rod 26; a first return spring 28 is sleeved on each first guide rod 26; one end of the first return spring 28 is connected to the first push rod 21; the other end of the first return spring 28 is connected to the first mounting block 27; and a first hand-push sensor 22 is located at the end of the first groove 25.
[0029] Specifically, the first chute 25 provides a guide path for the first guide rod 26, and the first return spring 28 enables the first push rod 21 to automatically return to its initial position after being pushed. Under normal conditions: when there is no emergency, the first push rod 21 is in its initial position and is held by the first return spring 28. When the operator senses danger or needs to stop the machine immediately, they can quickly push the first push rod 21. As the push rod moves along the first chute 25, it gradually approaches and eventually touches the first push sensor 22 located at the end of the chute. This triggers an emergency stop: the drive unit 14 immediately receives an electrical signal and stops the rotation of the front roller 12 and the rear roller 13 according to this signal, achieving an emergency stop. At this time, releasing the first push rod 21 allows it to automatically return to its initial position under the action of the first return spring 28. If the operator pushes the first push rod 21 again and maintains the pushing state, the first push sensor 22 continuously senses the electrical signal. After receiving the electrical signal, the drive unit 14 will drive the front roller 12 and the rear roller 13 to rotate in opposite directions, facilitating the operator's handling of emergencies. Until the operator releases the first push rod 21 and presses the start button of the open mill again.
[0030] like Figure 1-5 As shown in the figure, in this embodiment of an open mill with multiple safety protection devices, each of the two first chute 25 is provided with a protective cover 29.
[0031] This is to prevent dust or foreign objects from entering the first slide 25 during operation, which could cause the first push rod 21 to malfunction and prevent it from being pushed properly.
[0032] like Figure 1-5As shown, in this embodiment of an open mill with multiple safety protection devices, a second emergency stop button 16 is provided behind each of the two work frames 11; the second emergency stop button 16 is electrically connected to the drive device 14.
[0033] Specifically, the operating mode of the second emergency stop button 16 is set to be consistent with that of the first emergency stop button 15. In actual operation, materials will be processed at the front or rear of the open mill as needed. By setting the second emergency stop button 16 at the rear, the front roller 12 and the rear roller 13 can be braked quickly.
[0034] like Figure 1-5 As shown in the figure, in this embodiment of an open mill with multiple safety protection devices, a first baffle 31 is provided in front of the front roller 12; a second baffle 32 is provided behind the rear roller 13; the two ends of the first baffle 31 are detachably connected to the two work frames 11 respectively; the two ends of the second baffle 32 are detachably connected to the two work frames 11 respectively.
[0035] Since the front roll 12 and the rear roll 13 need to be heated during the operation of the open mill, a first baffle 31 and a second baffle 32 are provided. Specifically, insertion holes for installing the first baffle 31 and the second baffle 32 can be provided on the two work frames 11, so that the first baffle 31 or the second baffle 32 can be easily removed or installed.
[0036] like Figure 1-5 As shown in the figure, in this embodiment of an open mill with multiple safety protection devices, a second hand-push protection device 4 is provided behind the worktable 10; the second hand-push protection device 4 includes a second push rod, a second hand-push sensor and two parallel second connecting arms; the second connecting arms are located behind the worktable 10; the two ends of the second push rod are slidably connected to the two second connecting arms respectively; the second hand-push sensor is used to determine the position of the second push rod; the second hand-push sensor is electrically connected to the drive device 14.
[0037] The second hand-push protection device 4 has the same structure as the first hand-push protection device 2. The difference is that the second hand-push device will be installed behind the workbench 10, so that the operator can quickly and conveniently brake the front roller 12 and the rear roller 13 when working at the back.
[0038] like Figure 1-5 As shown in the figure, in this embodiment of an open mill with multiple safety protection devices, each of the two work frames 11 is provided with a mounting base 51; each mounting base 51 is provided with an adjusting rod 52; and each adjusting rod 52 is provided with a baffle 53 at its free end.
[0039] By setting baffles 53, materials can be prevented from overflowing from both sides of the front roller 12 and the rear roller 13, avoiding physical jamming into the gaps on both sides, and also facilitating the cleaning of the open mill.
[0040] like Figure 1-5 As shown in the figure, this embodiment of an open mill with multiple safety protection devices includes two kick protection devices. Each kick protection device includes a kick gate panel 61, a kick sensor 62, four guide posts (not shown), and four mounting plates 63. Each kick sensor 62 is electrically connected to the drive device 14 to detect the position of the kick gate panel 61. The four corners of each kick gate panel 61 are connected to the four mounting plates 63 by four guide bolts. Each guide bolt is fitted with a third return spring (not shown). One end of the third return spring is connected to the kick gate panel 61, and the other end is connected to the mounting plate 63. In one kick protection device, the kick sensor 62 and the four mounting plates 63 are installed on the front side of the bottom of the worktable 10. In the other kick protection device, the kick sensor 62 and the four mounting plates 63 are installed on the rear side of the bottom of the worktable 10.
[0041] In fact, the two foot-kick protection devices have the same structure. The difference is that the two mounting plates 63 are connected to the front and rear of the worktable 10 respectively, so the foot-kick door panel 61 can be installed on the front or the back. This allows for rapid braking of the front roller 12 and the rear roller 13 by kicking. The guide bolts ensure that the foot-kick door panel 61 is installed on the bottom of the worktable 10 and that it can move smoothly.
[0042] Normal state: In the absence of an emergency, the kick door panel 61 is in the initial position and is held by the third return spring.
[0043] Emergency handling: When the operator senses danger or needs to stop the machine immediately, they can kick the kick door 61. As the kick door 61 moves along the guide post, it will gradually approach and eventually touch the kick sensor 62.
[0044] Triggering an emergency stop: Once the position change of the foot-kick door panel 61 is detected by the foot-kick sensor 62, the system will receive an electrical signal, and the drive device 14 will stop the rotation of the front roller 12 and the rear roller 13 according to this signal, thus achieving an emergency stop.
[0045] The above description is only a preferred embodiment of the present utility model. Therefore, any equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included within the protection scope of the present utility model patent application.
Claims
1. A two-roll mill equipped with multiple safety protection devices, characterized in that: It includes a worktable (10) and two work frames (11) both disposed on the worktable (10); a front roller (12) and a rear roller (13) are disposed between the two work frames (11); it also includes a drive device (14) for rotating the front roller (12) and rotating the rear roller (13); The workbench (10) is provided with a first hand-push protection device (2) in front of it; The first push protection device (2) includes a first push rod (21), a first push sensor (22), and two parallel first connecting arms (23); the first connecting arms (23) are located in front of the workbench (10); the two ends of the first push rod (21) are slidably connected to the two first connecting arms (23); the first push sensor (22) is used to determine the position of the first push rod (21); Each of the two work racks (11) is equipped with a first emergency stop button (15) in front; The first emergency stop button (15) and the first push sensor (22) are both electrically connected to the drive device (14).
2. The open mill with multiple safety protection devices according to claim 1, characterized in that: The first push sensor (22) is a contact switch.
3. A two-roll mill with multiple safety protection devices according to claim 1 or 2, characterized in that: Each of the two first connecting arms (23) is provided with a first groove (25); each of the first grooves (25) is provided with a first guide rod (26); the two ends of the first push rod (21) are respectively connected to the front ends of the two first guide rods (26); Each of the first guide rods (26) has a first mounting block (27) inserted through its end; each of the first guide rods (26) has a first return spring (28) fitted on its end; one end of the first return spring (28) is connected to the first push rod (21); the other end of the first return spring (28) is connected to the first mounting block (27); and the first push sensor (22) is located at the end of the first slide groove (25).
4. A two-roll mill with multiple safety protection devices according to claim 3, characterized in that: Each of the two first slide grooves (25) is provided with a protective cover (29).
5. A two-roll mill with multiple safety protection devices according to claim 1, characterized in that: A second emergency stop button (16) is provided at the rear of each of the two work frames (11); the second emergency stop button (16) is electrically connected to the drive device (14).
6. A two-roll mill with multiple safety protection devices according to claim 1, characterized in that: A first baffle (31) is provided in front of the front roller (12); a second baffle (32) is provided behind the rear roller (13); the two ends of the first baffle (31) are detachably connected to the two work frames (11) respectively; the two ends of the second baffle (32) are detachably connected to the two work frames (11) respectively.
7. A two-roll mill with multiple safety protection devices according to claim 1, characterized in that: A second hand-push protection device (4) is provided behind the workbench (10); The second push protection device (4) includes a second push rod, a second push sensor and two parallel second connecting arms; the second connecting arms are located behind the worktable (10); the two ends of the second push rod are slidably connected to the two second connecting arms respectively; the second push sensor is used to determine the position of the second push rod; the second push sensor is electrically connected to the drive device (14).
8. A two-roll mill with multiple safety protection devices according to claim 1, characterized in that: Both of the work frames (11) are provided with mounting bases (51); each mounting base (51) is provided with an adjusting rod (52); and each adjusting rod (52) has a baffle (53) at its free end.
9. A two-roll mill with multiple safety protection devices according to claim 1, characterized in that: The open mill is also equipped with two kick protection devices; each kick protection device includes a kick door panel (61), a kick sensor (62), four guide columns and four mounting plates (63); Each of the foot-kick sensors (62) is electrically connected to the drive device (14) for detecting the position of the foot-kick door panel (61); Each of the four corners of the foot kick door panel (61) is connected to four mounting plates (63) by four guide bolts; Each of the guide bolts is fitted with a third return spring; one end of the third return spring is connected to the kick door panel (61); the other end of the third return spring is connected to the mounting plate (63); In one of the kick protection devices, the kick sensor (62) and the four mounting plates (63) are all mounted on the front side of the bottom of the workbench (10); In another kick protection device, the kick sensor (62) and the four mounting plates (63) are mounted on the rear side of the bottom of the workbench (10).