A type of open mill

Abstract

This utility model discloses an open mill, which suspends a scraper mechanism above the rear roller by setting a transverse loading mechanism between the two bearing seats of the mounting roller. A vertical limiting mechanism is set to make the cutter head of the scraper mechanism abut downward against the roller surface of the rear roller. This allows the adhesive layer and other materials adhering to the rear roller to be automatically scraped off by the scraper during rotation and fall back into the gap between the two rollers along the surface of the cutter head, reducing material loss and eliminating the need for manual scraping by operators. Operators can concentrate on turning the adhesive on the front roller, which helps to improve work efficiency and avoids accidental burns caused by operators repeatedly reaching across the front roller to the rear roller. Under the limitation of the vertical limiting mechanism, the cutter head remains against the roller surface of the rear roller, which can play a polishing role on the roller surface, restore the smoothness of the rear roller, realize the self-maintenance of the rear roller of the equipment, and prevent the adhesive layer from adhering to the surface of the rear roller again in a short period of time.

Description

Technical Field

[0001] This utility model relates to the field of polymer material mixing technology, and in particular to an open mill. Background Technology

[0002] A two-roll mill, also known as an open mixing mill or rubber mill, is a device used for mixing and processing polymer materials such as rubber and plastics. The main working components of a two-roll mill are two rollers rotating in opposite directions. The roller closer to the operating position is called the front roller. The front roller can be moved horizontally back and forth manually or electrically to adjust the distance between the two rollers to meet operational requirements, while the rear roller, farther from the operating position, is fixed. The front and rear rollers are the same size and rotate relative to each other at different speeds. Rubber materials are fed into the gap between the two rollers. The frictional shearing and extrusion action of the two rollers, rotating at different speeds, breaks down the molecular chains of the rubber material, improving its plasticity and achieving the purpose of plasticizing or mixing.

[0003] When the open mill is working, the plasticized rubber granules will adhere to the surface of the front roll. It is often necessary to continuously turn the rubber on the front roll. The rubber layer adhering to the surface of the front roll is scraped up into a clump by a scraper or scraper, so that it is squeezed back into a rubber layer by the gap between the two rolls. This ensures that the rubber material is fully compressed, so that the rubber material and the added auxiliary materials are evenly distributed, ensuring the quality requirements of plasticizing or mixing. However, after long-term use, the smoothness of the rear roll of the open mill decreases, and a rubber layer will adhere to the surface of the rear roll. If it is not dealt with, it will cause material loss and affect the uniformity. Manually scraping it off by the operator is tedious, affects the turning of the rubber on the front roll, and reduces the operating efficiency and output quality. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an open mill to solve the above problems.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides an open mill, which includes a frame, a transverse loading mechanism, a vertical limiting mechanism, and a scraper mechanism.

[0007] The frame includes two vertical bearing seats, and a front roller and a rear roller are connected between the two bearing seats. The front roller and the rear roller are arranged side by side.

[0008] The transverse loading mechanism includes a crossbar and a loading platform. The two ends of the crossbar are respectively connected to two bearing seats. The crossbar is suspended above the rear roller and parallel to the rear roller. The loading platform is connected to the crossbar.

[0009] The vertical limiting mechanism includes a fixed part, a screw, and a movable part. The fixed part is locked to the platform. The screw is threaded through the fixed part and extends vertically. The movable part is fixed to the bottom end of the screw and can move up and down with the screw.

[0010] The scraper mechanism includes a scraper and a scraper holder. The scraper holder includes a connecting horizontal plate and two connecting vertical rods. The connecting horizontal plate is locked to the movable part by screws. The left and right ends of the connecting horizontal plate are respectively connected to the top ends of the two connecting vertical rods. The scraper includes a scraper head and two scraper handles. The scraper head extends laterally parallel to the rear roller. The two scraper handles are respectively located at the left and right ends of the scraper head and are correspondingly connected to the bottom ends of the two connecting vertical rods. The scraper head is located on the side of the scraper handle away from the front roller and is used to abut against the roller surface of the rear roller.

[0011] Preferably, the platform is slidably connected to the crossbar, and a locking screw is provided on the side of the platform facing away from the fixed part.

[0012] Preferably, the cutter head has a beak-shaped structure that curves toward the handle, and the handle is suspended above the rear roller.

[0013] Preferably, the blade has an opening between the two handles, and the side of the blade facing the opening is a downwardly sloping surface.

[0014] Preferably, two adjustable baffles are slidably connected to the crossbar, the two adjustable baffles are located on the left and right sides of the platform respectively, and locking screws are provided at the top of the adjustable baffles.

[0015] Preferably, the top end of the screw is provided with an adjusting handle extending radially therefrom, for driving the screw to rotate in the fixed part.

[0016] Preferably, there are two crossbars, which are arranged parallel to each other.

[0017] Preferably, the platform is provided with a transverse sliding rod on the side facing away from the fixed part, and the transverse sliding rod extends forward away from the platform and then upward.

[0018] The main technical effects achieved by this utility model are as follows:

[0019] Based on the above-mentioned open mill, a platform is erected on the crossbar between the two bearing seats. A vertical limiting mechanism and a scraper mechanism are installed on the platform, so that the scraper mechanism is suspended above the rear roller. By rotating the screw in the vertical limiting mechanism, the movable part is driven to descend, and the scraper of the connected scraper mechanism is pressed against the roller surface of the rear roller. When the open mill is running, the rotation of the rear roller causes the rubber layer attached to the roller surface to move to the scraper tip. The scraper tip can cut into the bottom of the rubber layer and scrape it off from the roller surface. The peeled rubber material falls into the gap between the two rollers along the slope of the scraper tip for re-plasticizing or mixing, reducing material loss and eliminating the need for operators to manually scrape off the rubber from the rear roller during operation. Operators can concentrate on turning the rubber on the front roller, which helps to improve work efficiency and avoids accidental burns caused by operators repeatedly reaching across the front roller to the rear roller.

[0020] At the same time, the continuous scraping of the cutter head on the surface of the rear roller also has a polishing effect, maintaining the smoothness of the roller surface and preventing the rubber material from adhering to the rear roller again in a short period of time.

[0021] After being peeled off, the rubber material falls down the slope of the cutter head through the opening. Due to the suspended design of the opening and the cutter handle and connecting vertical rod, the rubber material can be reduced from being stuck, and can fall smoothly into the gap between the two rollers with less resistance. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the open mill provided by this utility model on the front roll side;

[0023] Figure 2 For the corresponding Figure 1 A magnified view of a portion of region A within the circular dashed box;

[0024] Figure 3 This is a schematic diagram of the open mill on the rear roll side;

[0025] Figure 4 For the corresponding Figure 3 A magnified view of the area B within the middle circular dashed box;

[0026] Figure 5 This is a side view of the cutter head of the open mill.

[0027] The reference numerals in the above figures are as follows:

[0028] Frame 1, bearing housing 11, front roller 12, rear roller 13, and adjusting baffle 14;

[0029] Horizontal loading mechanism 2, crossbar 21, loading platform 22, horizontal sliding rod 221, locking screw 23;

[0030] Vertical limiting mechanism 3, fixed part 31, screw 32, adjusting handle 321, movable part 33;

[0031] Scraper mechanism 4, scraper 41, opening 410, cutter head 411, cutter handle 412, cutter holder 42, connecting horizontal plate 421, connecting vertical rod 422. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Examples of these preferred embodiments are illustrated in the drawings. The embodiments of this utility model shown in and described with reference to the drawings are merely exemplary, and this utility model is not limited to these embodiments.

[0033] To avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the solution according to the present invention are shown in the accompanying drawings, while other details that are not of great importance are omitted.

[0034] like Figure 1 and Figure 3 As shown in the figure, this utility model embodiment provides an open mill, which includes a frame 1, a transverse loading mechanism 2, a vertical limiting mechanism 3, and a scraper mechanism 4.

[0035] The frame 1 includes two vertical bearing seats 11, and a front roller 12 and a rear roller 13 are connected between the two bearing seats 11. The front roller 12 and the rear roller 13 are arranged side by side.

[0036] Combination Figure 1 and Figure 2 As shown, the transverse loading mechanism 2 includes a crossbar 21 and a loading platform 22. The two ends of the crossbar 21 are respectively connected to two bearing seats 11. The crossbar 21 is suspended above the rear roller 13 and parallel to the rear roller 13. The loading platform 22 is connected to the crossbar 21.

[0037] Combination Figure 3 and Figure 4 As shown, the vertical limiting mechanism 3 includes a fixed part 31, a screw 32, and a movable part 33. The fixed part 31 is locked on the platform 22. The screw 32 is threaded through the fixed part 31 and extends vertically. The movable part 33 is fixed to the bottom end of the screw 32 and can move up and down with the screw 32.

[0038] The scraper mechanism 4 includes a scraper 41 and a blade holder 42. The blade holder 42 includes a connecting horizontal plate 421 and two connecting vertical rods 422. The connecting horizontal plate 421 is locked to the movable part 33 by screws. The left and right ends of the connecting horizontal plate 421 are respectively connected to the top ends of the two connecting vertical rods 422. The scraper 41 includes a blade head 411 and two blade handles 412. The blade head 411 extends laterally parallel to the rear roller 13. The two blade handles 412 are respectively located at the left and right ends of the blade head 411 and are correspondingly connected to the bottom ends of the two connecting vertical rods 422. The blade head 411 is located on the side of the blade handles 412 away from the front roller 12. The blade head 411 is used to abut against the roller surface of the rear roller 13.

[0039] The working principle of the open mill provided in this embodiment of the present invention is as follows:

[0040] The platform 22 of the transverse loading mechanism 2 is connected to the crossbar 21 between the two bearing seats 11, allowing the vertical limiting mechanism 3 and its scraper roller mechanism 4 to be suspended above the rear roller 13 by the platform 22. The movable part 33 is driven to descend by the adjusting screw 32. The connecting horizontal plate 421 and connecting vertical rod 422 of the blade holder 42 are driven to descend by the movable part 33. The two blade handles 412 of the scraper 41 are connected to the bottom ends of the two connecting vertical rods 422, so the blade of the scraper 41... The head 411 can descend with the movable part 33 and come into contact with the roller surface of the rear roller 13. Since the front roller 12 and the rear roller 13 will rotate in opposite directions when the open mill is working, the material such as the rubber layer attached to the rear roller 13 will pass through the scraper 41 after rotation and be scraped off the surface of the rear roller 13 by the scraper 41. The scraped rubber layer falls along the surface of the cutter head 411 into the gap between the front roller 12 and the rear roller 13, and is plasticized again by friction shearing and extrusion in the gap between the two rollers.

[0041] The aforementioned open mill automatically scrapes off the adhesive layer adhering to the rear roller 13 via the scraper mechanism 4 as the equipment operates, eliminating the need for operators to manually scrape off the adhesive layer on the rear roller 13. This allows operators to focus more on the refining of the front roller, improving work efficiency and refining effect. It also prevents operators from accidentally burning themselves by repeatedly reaching their hands across the front roller 12 to the rear roller 13. The cutter head 411 remains in contact with the roller surface of the rear roller 13, which can polish the roller surface, restore the smoothness of the rear roller 13, and prevent the adhesive layer from re-forming on the surface of the rear roller in a short period of time. The scraped adhesive layer falls into the gap between the front roller 12 and the rear roller 13 for re-plasticizing, which can reduce material loss.

[0042] In the scraper mechanism 4, two blade handles 412 are respectively located at the left and right ends of the blade head 411 and are connected to the bottom ends of the two connecting vertical rods 422. This allows the scraped adhesive layer to fall between the two blade handles 412 along the blade head 411 and into the gap between the two rollers, bypassing the obstruction of the blade holder 42 and the blade handles 412, thus ensuring that the adhesive layer passes smoothly.

[0043] The lateral extension length of the blade head 411 of the scraper 41 is selected according to the overall length of the rear roller 13 and the working area length of the gap between the two rollers. The original scraper 41 can be removed and replaced with other scrapers 41 of different sizes. Since the connecting horizontal plate 421 of the blade holder 42 is locked to the movable part 33 by screws, the connecting horizontal plate 421 can also be removed from the movable part 33 to replace the blade holder 42. The detachable connection design between the handle 412 and the connecting vertical rod 422 facilitates the replacement of scrapers 41 of different sizes or wear levels. Furthermore, the platform 22 is slidably connected to the horizontal rod 21. The side of the platform 22 facing away from the fixed part 31 is provided with a locking screw 23. By adjusting the position of the platform 22 on the horizontal rod 21, the position of the blade head 411 of the scraper 41 on the rear roller 13 is changed, thereby adapting to the different working areas where the adhesive layer adheres. The platform 22 can be slidably connected to the crossbar 21 via a sliding sleeve structure. The operator can move the platform 22 along the length of the crossbar 21 to adjust the lateral position of the scraper mechanism 4 above the rear roller 13, accurately covering the adhesive layer adhesion area. The locking screw 23 is inserted into the platform 22 and abuts against the crossbar 21 to lock and fix the platform 22 and the crossbar 21, thus fixing the lateral position of the platform 22. Of course, in addition to the locking screw 23, there are many other locking structures for objects sliding along the bar in the prior art, which will not be elaborated here.

[0044] Combination Figure 4 and Figure 5 As shown, in order to ensure that the scraper 41 can be close to the roller surface and apply a sufficiently strong pressure to the adhesive layer so that the adhesive layer can be easily scraped off, the shape of the blade 411 should be sharp and adapted to the curvature of the rear roller 13. In this embodiment, the blade 411 has a beak-shaped structure that bends toward the handle, and the handle 412 is suspended above the rear roller 13.

[0045] By reducing the area of ​​the blade head 411, the amount of adhesive layer adhering to the blade head 411 is reduced. The blade head 411 has an opening 410 between the two handles 412. The side of the blade head 411 facing the opening 410 is a downwardly sloping surface, so that the adhesive layer falls down along the slope after being scraped off the blade head 411, further making the adhesive layer pass through more smoothly.

[0046] Furthermore, two adjustable baffles 14 are slidably connected to the crossbar 21. The two adjustable baffles 14 are located on the left and right sides of the platform 22, respectively, and locking screws 23 are provided at the top of the adjustable baffles 14. Common open mills typically include adjustable gap baffles 14. Two adjustable gap baffles 14 and two rollers enclose a working area for placing materials. The length of the working area is changed by adjusting the distance between the two adjustable gap baffles 14, thus limiting the lateral overflow range of materials. There are many existing technologies for the moving and locking structures of the adjustable gap baffles 14. In this embodiment, the lateral movement of the adjustable gap baffles 14 can be achieved using the crossbar 21. After the position of the adjustable gap baffles 14 is adjusted, the locking screws 23 inserted into the adjustable gap baffles 14 are screwed in. The locking screws 23 abut against the crossbar 21, locking the adjustable gap baffles 14 and the crossbar 21, thus limiting the movement of the adjustable gap baffles 14 for positioning. The lateral movement range of the scraper 41 can be synchronously matched with the position of the adjustable gap baffles 14.

[0047] When it is necessary to adjust the position of the bearing seat 11 on the crossbar 21, the movable part 33 is driven to move the scraper mechanism 4 upward by rotating the screw 32, so that the cutter head 411 is not tightly abutting against the roller surface of the rear roller 13. In order to facilitate the rotation of the screw 32, an adjustment handle 321 extending radially through the top of the screw 32 is provided to drive the screw 32 to rotate in the fixed part 31.

[0048] By rotating the adjusting handle 321 at the top of the screw 32, the movable part 33 is driven to rise and fall vertically, achieving fine adjustment of the height of the scraper 41. The threaded fit design of the screw 32 ensures that the cutter head 411 maintains stable downward pressure during operation, preventing it from detaching from the roller surface due to vibration. Furthermore, springs are respectively fitted on the two connecting vertical rods 422, so that the springs abut against the connecting horizontal plate 421 and the cutter handle 412, allowing the springs to press the cutter handle 412 to make the cutter head 411 fit more tightly against the roller surface of the rear roller 13.

[0049] For example, there are two crossbars 21, which are arranged in parallel to each other. The double-bar mechanism 21 helps to improve the stability of the transfer structure.

[0050] The platform 22 is provided with a transverse pull rod 221 on the side facing away from the fixed part 31. The transverse pull rod 221 extends away from the platform 22, then forward and then upward, forming an L-shaped structure, which makes it easy for the operator to pull the platform 22.

[0051] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0052] The above description is only a specific embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. An open mill characterized in that, It includes: The frame (1) includes two vertical bearing seats (11), and a front roller (12) and a rear roller (13) are connected between the two bearing seats (11). The front roller (12) and the rear roller (13) are arranged side by side. A transverse loading mechanism (2) includes a crossbar (21) and a loading platform (22). The two ends of the crossbar (21) are respectively connected to two bearing seats (11). The crossbar (21) is suspended above the rear roller (13) and parallel to the rear roller (13). The loading platform (22) is connected to the crossbar (21). A vertical limiting mechanism (3) is provided, comprising a fixed part (31), a screw (32), and a movable part (33). The fixed part (31) is locked on the platform (22). The screw (32) is threaded through the fixed part (31) and extends vertically. The movable part (33) is fixed to the bottom end of the screw (32) and can move up and down with the screw (32). The scraper mechanism (4) includes a scraper (41) and a blade holder (42). The blade holder (42) includes a connecting horizontal plate (421) and two connecting vertical rods (422). The connecting horizontal plate (421) is locked to the movable part (33) by screws. The left and right ends of the connecting horizontal plate (421) are respectively connected to the top ends of the two connecting vertical rods (422). The scraper (41) includes a blade head (411) and two blade handles (412). The blade head (411) extends laterally parallel to the rear roller (13). The two blade handles (412) are respectively located at the left and right ends of the blade head (411) and are correspondingly connected to the bottom ends of the two connecting vertical rods (422). The blade head (411) is located on the side of the blade handles (412) away from the front roller (12). The blade head (411) is used to abut against the roller surface of the rear roller (13).

2. The roll mill of claim 1, wherein The platform (22) is slidably connected to the crossbar (21), and a locking screw (23) is provided on the side of the platform (22) facing away from the fixing part (31).

3. The roll mill of claim 1, wherein The cutter head (411) has a beak-shaped structure that bends toward the handle (412), which is suspended above the rear roller (13).

4. The roll mill of claim 1, wherein The cutting head (411) has an opening (410) between the two handles (412), and the side of the cutting head (411) facing the opening (410) is a downwardly sloping surface.

5. The roll mill of claim 1, wherein Two adjustable baffles (14) are slidably connected to the crossbar (21). The two adjustable baffles (14) are located on the left and right sides of the platform (22), respectively. A locking screw (23) is provided at the top of the adjustable baffle (14).

6. The roll mill of claim 1, wherein The top end of the screw (32) is provided with an adjustment handle (321) extending radially therefrom, for driving the screw (32) to rotate in the fixed part (31).

7. The roll mill of claim 1, wherein There are two crossbars (21), and the two crossbars (21) are arranged parallel to each other.

8. The roll mill of claim 1, wherein The stage (22) is provided with a horizontal moving pull rod (221) on the side away from the fixing part (31), which extends away from the stage (22) to the forward roller (12) and then upwardly.

Images