laboratory mini roll mill

Abstract

The application belongs to the technical field of open mill, and discloses a laboratory small open mill, which comprises an open mill main body, two open mill rollers rotatably installed on the open mill main body, an open mill motor arranged on the open mill main body and used for driving the two open mill rollers to synchronously and reversely rotate, a mounting bracket fixedly arranged on the open mill main body, a lifting frame slidably arranged on the mounting bracket, two sliding plates slidably arranged on the lifting frame, cutting knives arranged on the two sliding plates, a distance adjusting mechanism arranged on the lifting frame and used for adjusting the distance between the two sliding plates, and a lifting mechanism arranged on the mounting bracket and used for adjusting the height of the lifting frame. The distance adjusting mechanism comprises a bidirectional threaded rod, a cross rod, a driven gear, a distance adjusting motor and a driving gear. According to the application, the distance between the two sliding plates and the height of the two sliding plates can be changed through the distance adjusting mechanism and the lifting mechanism, so that the rubber strips with different widths can be cut, and the application range of the device is expanded.

Description

Technical Field

[0001] This utility model relates to the field of open mill technology, and in particular to a small laboratory open mill. Background Technology

[0002] An open mixing mill, also known as an open rubber mixing mill, is a plasticizing, mixing, sheeting, and crushing machine for raw rubber. Its main structure consists of two cooperating pressure rollers that rotate simultaneously, using the pressure rollers to press the raw rubber for mixing, crushing, or sheeting.

[0003] Chinese utility model patent CN223252084U discloses an open mill with a slicing mechanism, including a support, a pressure roller mechanism rotatably mounted on the support, and a first mounting shaft fixed on the support. The slicing mechanism includes a mounting bracket mounted on the first mounting shaft and a cutter rotatably connected to the mounting bracket. The surface of the cutter is provided with a blade that matches the cutting shape, and the blade is tangential to the pressure roller of the pressure roller mechanism.

[0004] An existing open mill with a slicing mechanism uses roller cutters and blades mounted on them. However, this structure is relatively simple and can only cut rubber strips of a single width. It cannot cut rubber strips of different widths according to production needs, thus limiting the applicability of the device. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a small laboratory open mixing mill.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a small laboratory open mill, including an open mill body and two open mill rolls rotatably mounted on the open mill body. The open mill body is provided with an open mill motor for driving the two open mill rolls to rotate synchronously in opposite directions. An installation frame is fixed on the open mill body. A lifting frame is slidably mounted on the installation frame. Two sliding plates are slidably mounted on the lifting frame. Each of the two sliding plates is provided with a cutting blade. An adjustment mechanism for adjusting the distance between the two sliding plates is provided on the lifting frame. A lifting mechanism for adjusting the height of the lifting frame is provided on the installation frame.

[0007] By adopting the above technical solution, the distance between the two sliding plates is first adjusted by controlling the distance adjustment mechanism, and then the distance between the cutting blades connected to the two sliding plates is adjusted until the required distance is achieved. Then, the lifting mechanism is controlled to drive the lifting frame to descend, which in turn drives the sliding plates connected to the lifting frame and the cutting blades connected to the sliding plates to descend until the cutting blades are close to the surface of the open mill roll. During this process, the two cutting blades cut the colloid. The distance between the two sliding plates can be changed by the distance adjustment mechanism to cut colloid strips of different widths, thus expanding the applicability of the device.

[0008] Furthermore, the adjusting mechanism includes a bidirectional threaded rod rotatably mounted on the lifting frame and threadedly connected to two sliding plates, a crossbar fixed on the lifting frame and slidingly engaged with the two sliding plates, a driven gear fixedly sleeved on the bidirectional threaded rod, an adjusting motor mounted on the lifting frame, and a driving gear fixedly sleeved on the output end of the adjusting motor and meshing with the driven gear. The bidirectional threaded rod is provided with two sections of threads with opposite directions and equal pitch, and the two sliding plates are disposed on the two sections of threads and threadedly connected.

[0009] By adopting the above technical solution, after the adjustable pitch motor works, it drives the driving gear to rotate, which in turn drives the driven gear meshing with the driving gear and the bidirectional threaded rod fixed to the driven gear to rotate. Since the bidirectional threaded rod is provided with two sections of threads with opposite directions and equal pitch, the two sliding plates are provided on the two sections of threads and are threadedly connected. Under the good limiting effect of the crossbar, the distance between the two sliding plates can be adjusted.

[0010] Furthermore, the lifting mechanism includes a lifting assembly, which includes two sliding seats that are respectively fixed to both ends of the lifting frame and slidably engaged with the mounting frame, a lifting screw that is rotatably mounted on the mounting frame and threadedly connected to the sliding seats, and a mounting shell fixed to the top of the mounting frame. The number of lifting screws is equal to the number of sliding seats and their positions correspond one-to-one. The upper ends of the two lifting screws are rotatably connected to the mounting shell. The lifting mechanism also includes a rotating assembly for driving the two lifting screws to rotate synchronously.

[0011] By adopting the above technical solution, the two lifting screws are driven to rotate synchronously by the rotating component. Since the mounting frame and the sliding seat are in sliding fit, and the sliding seat is threadedly connected to the lifting screw, the sliding seat and the lifting frame connected to the sliding seat can rise or fall. Through the cooperation of the adjusting mechanism and the lifting mechanism, the cutting blade can be moved away from the feeding position, which is convenient for the staff to feed materials normally.

[0012] Furthermore, the rotating assembly includes a lifting motor fixed to the mounting housing and driving one of the lifting screws to rotate, two synchronous pulleys respectively fixedly sleeved on the two lifting screws, and a synchronous belt that meshes with both synchronous pulleys. The synchronous pulleys and the synchronous belt are both located inside the mounting housing.

[0013] By adopting the above technical solution, after the lifting motor is working, it drives one of the lifting screws to rotate. With the cooperation of the synchronous pulley and the synchronous belt, the other lifting screw is then rotated to ensure the normal lifting operation of the device.

[0014] Furthermore, the mounting frame is provided with two sets of protective mechanisms symmetrically arranged about the lifting frame. The protective mechanism includes a shielding component, which includes a protective box fixed to the mounting frame and having a ring structure. The bottom of the protective box has a connecting through hole for the sliding plate and the cutting blade to pass through. The sliding plate, the cutting blade, and the lifting frame are all located inside the protective box. The shielding component also includes a protective block that is slidably fitted through the protective box and a pressing block that is fixed to the lifting frame and has a right-angled trapezoidal shape. Both protective blocks are U-shaped, and the lower sides of the two protective blocks are in contact with each other. The side wall of the upper side of the protective block near the lifting frame is an inclined surface, and the inclined surface of the protective block is in contact with the inclined surface of the pressing block. The protective mechanism also includes a reset component for driving the protective block to reset.

[0015] By adopting the above technical solution, when the lifting frame descends, it drives the extrusion block to descend as well. The extrusion block will squeeze the protective block to move away from the lifting frame until the vertical surface of the extrusion block contacts the upper side of the protective block. At this time, the lower side of the two protective blocks is in a separated state, and the sliding plate and the cutting blade can pass through the space between the lower side of the two protective blocks. At the same time, the sliding plate and the cutting blade descend to a position close to the connecting through hole, and continue to drive the lifting frame to descend. Due to the limiting effect of the extrusion block on the protective block, it can be ensured that the sliding plate and the cutting blade pass through the space between the lower side of the two protective blocks until the cutting blade approaches the surface of the open mill roll and performs a cutting operation on the colloid. When the cutting blade is in a non-working state, it is located inside the protective box, and the lower side of the protective block blocks the connecting through hole, which avoids the situation where the operator comes into contact with the cutting blade when pouring material, thus improving the safety of the device.

[0016] Furthermore, the reset assembly includes a mounting plate fixed to the side wall of the protective box and a reset spring fixed between the mounting plate and the protective block.

[0017] By adopting the above technical solution, during the descent of the extrusion block, the contact between the inclined surface of the protective block and the inclined surface of the extrusion block changes to the contact between the upper side of the protective block and the vertical surface of the extrusion block. During this process, the protective block is forced to move away from the lifting frame, and the return spring gradually contracts until the lower sides of the two protective blocks move away from each other, allowing the sliding plate to pass through the connecting through hole. Similarly, during the ascent and resetting of the extrusion block, the return spring gradually extends and resets, changing the contact between the vertical surface of the protective block and the extrusion block to the contact between the inclined surface of the protective block and the inclined surface of the extrusion block, so that the lower sides of the two protective blocks fit together and provide protection.

[0018] Furthermore, the reset assembly also includes a limiting rod that is disposed through the protective block and slidably engaged with it. One end of the limiting rod is fixed to the protective box, and the other end of the limiting rod is fixed to the mounting plate.

[0019] By adopting the above technical solution, the limiting rod effectively limits movement, thus improving the stability of the protective block during its movement.

[0020] Furthermore, multiple ball bearings are movably installed on the side wall of the extrusion block near the protective block.

[0021] By adopting the above technical solution, the ball bearings are configured to convert the sliding friction between the extrusion block and the protective block into rolling friction, thereby reducing the friction between the protective block and the extrusion block.

[0022] In summary, the present invention has the following beneficial effects: In this application, by setting an adjusting mechanism and a lifting mechanism, the distance between the two sliding plates and the height of the two sliding plates can be changed so as to cut rubber strips of different widths, thereby expanding the applicability of the device. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram illustrating the connection structure between the sliding seat and the lifting screw in this embodiment of the present invention; Figure 3 This is a schematic diagram illustrating the internal structure of the protective box in an embodiment of this utility model; Figure 4 This is a schematic diagram illustrating the internal structure of the lifting frame in an embodiment of this utility model; Figure 5 yes Figure 4 Enlarged diagram of point A in the middle.

[0024] In the diagram: 1. Open mill body; 2. Open mill roll; 3. Mounting frame; 4. Lifting frame; 5. Sliding plate; 6. Cutting knife; 7. Adjusting mechanism; 71. Bidirectional threaded rod; 72. Crossbar; 73. Driven gear; 74. Adjusting motor; 75. Drive gear; 8. Lifting mechanism; 81. Lifting assembly; 811. Sliding seat; 812. Lifting screw; 813. Mounting shell; 82. Rotating assembly; 821. Lifting motor; 822. Synchronous pulley; 823. Synchronous belt; 9. Protective mechanism; 91. Shielding assembly; 911. Protective box; 912. Protective block; 913. Extrusion block; 92. Reset assembly; 921. Mounting plate; 922. Reset spring; 923. Limiting rod; 10. Connecting through hole. Detailed Implementation

[0025] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0026] like Figure 1-5 As shown in the embodiment of this application, a small laboratory open mill is disclosed, including an open mill body 1, an adjusting mechanism 7, a lifting mechanism 8, and a protective mechanism 9. Two open mill rolls 2 are arranged on the open mill body 1. An open mill motor is arranged on the open mill body 1 to drive the two open mill rolls 2 to rotate synchronously in opposite directions. A mounting frame 3 is fixed on the open mill body 1. A lifting frame 4 is slidably arranged on the mounting frame 3, and two sliding plates 5 are slidably arranged on the lifting frame 4. Each of the two sliding plates 5 is provided with a cutting blade 6. First, the distance adjustment mechanism 7 is operated to adjust the distance between the two sliding plates 5, and then the distance between the cutting blades 6 connected to the two sliding plates 5 is adjusted until the required distance is achieved. Then, the lifting mechanism 8 is operated to drive the lifting frame 4 to descend, which in turn drives the sliding plates 5 connected to the lifting frame 4 and the cutting blades 6 connected to the sliding plates 5 to descend until the cutting blades 6 are close to the surface of the open mill roll 2. During this process, the two cutting blades 6 cut the colloid. The distance between the two sliding plates 5 can be changed by the distance adjustment mechanism 7 to cut colloid strips of different widths, thus expanding the applicability of the device.

[0027] An adjusting mechanism 7 is mounted on the lifting frame 4 and is used to adjust the distance between the two sliding plates 5. The adjusting mechanism 7 includes a bidirectional threaded rod 71, a crossbar 72, a driven gear 73, an adjusting motor 74, and a driving gear 75. The bidirectional threaded rod 71 is rotatably mounted on the lifting frame 4 and threadedly connected to both sliding plates 5. The bidirectional threaded rod 71 has two sections of threads with opposite directions and equal pitch. The two sliding plates 5 are mounted on the two sections of threads and threadedly connected. The crossbar 72 is fixed to the lifting frame 4 and slidably engages with both sliding plates 5. The driven gear 73 is fixedly sleeved on the bidirectional threaded rod 71. The adjusting motor 74 is mounted on the lifting frame 4, and the driving gear 75 is fixedly sleeved on the output end of the adjusting motor 74 and meshes with the driven gear 73. After the adjustable pitch motor 74 starts working, it drives the drive gear 75 to rotate, which in turn drives the driven gear 73 that meshes with the drive gear 75 and the bidirectional threaded rod 71 that is fixed to the driven gear 73 to rotate. Since the bidirectional threaded rod 71 is provided with two sections of threads with opposite directions and equal pitch, the two sliding plates 5 are set on the two sections of threads and are threadedly connected. Under the good limiting effect of the crossbar 72, the distance between the two sliding plates 5 can be adjusted.

[0028] A lifting mechanism 8 is mounted on the mounting frame 3 and is used to adjust the height of the lifting frame 4. The lifting mechanism 8 includes a lifting assembly 81 and a rotating assembly 82. The lifting assembly 81 includes a sliding seat 811, lifting screws 812, and a mounting housing 813. Two sliding seats 811 are fixed to the lifting frame 4 and slidably engaged with the mounting frame 3, located at opposite ends of the lifting frame 4. The lifting screws 812 are rotatably mounted on the mounting frame 3 and threadedly connected to the sliding seats 811. The number of lifting screws 812 is equal to the number of sliding seats 811, and their positions correspond one-to-one. The upper ends of both lifting screws 812 are rotatably connected to the mounting housing 813, which is fixed to the top of the mounting frame 3. The rotating component 82 drives the two lifting screws 812 to rotate synchronously. Since the mounting bracket 3 and the sliding seat 811 are in sliding fit, and the sliding seat 811 is threadedly connected to the lifting screw 812, the sliding seat 811 and the lifting frame 4 connected to the sliding seat 811 both rise or fall. Through the cooperation of the adjusting mechanism 7 and the lifting mechanism 8, the cutting blade 6 can be moved away from the feeding position, which is convenient for the staff to feed materials normally.

[0029] The rotating assembly 82 drives the two lifting screws 812 to rotate synchronously. The rotating assembly 82 includes a lifting motor 821, synchronous pulleys 822, and a synchronous belt 823. The lifting motor 821 is fixed to the mounting housing 813 and drives one of the lifting screws 812 to rotate. Two synchronous pulleys 822 are fixedly sleeved on the lifting screw 812, each located on one of the two lifting screws 812. The synchronous belt 823 meshes with both synchronous pulleys 822, and both the synchronous pulleys 822 and the synchronous belt 823 are located within the mounting housing 813.

[0030] The protective mechanism 9 is mounted on the mounting frame 3. Two sets of the protective mechanism 9 are symmetrically arranged about the lifting frame 4. The protective mechanism 9 includes a shielding component 91 and a resetting component 92. The shielding component 91 includes a protective box 911, a protective block 912, and a pressing block 913. The protective box 911 is fixed to the mounting frame 3 and has a ring structure. The bottom of the protective box 911 has a through hole 10 for the sliding plate 5 and the cutting blade 6 to pass through. The sliding plate 5, the cutting blade 6, and the lifting frame 4 are all located inside the protective box 911. The protective blocks 912 are mounted through the protective box 911 and slide in fit. Both protective blocks 912 are U-shaped. The side wall of the upper block of the protective block 912 near the lifting frame 4 is an inclined surface, which fits against the inclined surface of the pressing block 913. The lower blocks of the two protective blocks 912 fit against each other. The pressing block 913 is fixed to the lifting frame 4 and is a right-angled trapezoid. When the lifting frame 4 descends, it drives the extrusion block 913 to descend as well. The extrusion block 913 will squeeze the protective block 912 to move away from the lifting frame 4 until the vertical surface of the extrusion block 913 contacts the upper side of the protective block 912. At this time, the lower side of the two protective blocks 912 is separated, and the sliding plate 5 and the cutting blade 6 can pass through the space between the lower side of the two protective blocks 912. At the same time, the sliding plate 5 and the cutting blade 6 descend to a position close to the connecting through hole 10, and continue to drive the lifting frame 4 to descend. Due to the limiting effect of the extrusion block 913 on the protective block 912, it can be ensured that the sliding plate 5 and the cutting blade 6 pass through the space between the lower side of the two protective blocks 912 until the cutting blade 6 approaches the surface of the open mill roll 2 and performs a cutting operation on the colloid. When the cutting blade 6 is in a non-working state, it is located inside the protective box 911, and the lower side of the protective block 912 blocks the connecting through hole 10, which avoids the situation where the operator comes into contact with the cutting blade 6 when pouring the material, thus improving the safety of the device.

[0031] The reset assembly 92 is used to drive the protective block 912 to reset. The reset assembly 92 includes a mounting plate 921 and a reset spring 922. The mounting plate 921 is fixed to the side wall of the protective box 911, and the reset spring 922 is fixed between the mounting plate 921 and the protective block 912. During the descent of the pressing block 913, the contact between the inclined surface of the protective block 912 and the inclined surface of the pressing block 913 changes to the contact between the upper side of the protective block 912 and the vertical surface of the pressing block 913. During this process, the protective block 912 is forced to move away from the lifting frame 4, and the reset spring 922 is forced to gradually contract until the lower side of the two protective blocks 912 move away from each other, so that the sliding plate 5 can pass through the connecting through hole 10. Similarly, during the process of the extrusion block 913 rising and resetting, the reset spring 922 gradually extends and resets, changing the contact between the vertical surface of the protective block 912 and the extrusion block 913 to the contact between the inclined surface of the protective block 912 and the inclined surface of the extrusion block 913, so that the lower parts of the two protective blocks 912 fit together and play a protective role.

[0032] The reset assembly 92 also includes a limiting rod 923, which is slidably mounted on the protective block 912. One end of the limiting rod 923 is fixed to the protective box 911, and the other end is fixed to the mounting plate 921. The limiting rod 923 provides good limiting, improving the stability of the protective block 912 during movement.

[0033] Multiple ball bearings are movably mounted on the side wall of the extrusion block 913 near the protective block 912. The ball bearings convert the sliding friction between the extrusion block 913 and the protective block 912 into rolling friction, thereby reducing the friction between the protective block 912 and the extrusion block 913.

[0034] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A small laboratory open mill, comprising an open mill body (1) and two open mill rolls (2) rotatably mounted on the open mill body (1), characterized in that: The main body (1) of the open mill is fixed with a mounting frame (3), a lifting frame (4) is slidably mounted on the mounting frame (3), two sliding plates (5) are slidably mounted on the lifting frame (4), and a cutting blade (6) is mounted on each of the two sliding plates (5). The lifting frame (4) is equipped with a distance adjustment mechanism (7) for adjusting the distance between the two sliding plates (5), and the mounting frame (3) is equipped with a lifting mechanism (8) for adjusting the height of the lifting frame (4).

2. The laboratory miniature open mill according to claim 1, characterized in that: The adjusting mechanism (7) includes a bidirectional threaded rod (71) rotatably mounted on the lifting frame (4) and threadedly connected to two sliding plates (5), a crossbar (72) fixed on the lifting frame (4) and slidingly engaged with the two sliding plates (5), a driven gear (73) fixedly sleeved on the bidirectional threaded rod (71), an adjusting motor (74) set on the lifting frame (4), and a driving gear (75) fixedly sleeved on the output end of the adjusting motor (74) and meshing with the driven gear (73). The bidirectional threaded rod (71) is provided with two sections of threads with opposite directions and equal pitch. The two sliding plates (5) are set on the two sections of threads and threadedly connected.

3. The laboratory miniature open mill according to claim 1, characterized in that: The lifting mechanism (8) includes a lifting assembly (81), which includes two sliding seats (811) that are respectively fixed to both ends of the lifting frame (4) and slidably engaged with the mounting frame (3), a lifting screw (812) that is rotatably mounted on the mounting frame (3) and threadedly connected to the sliding seat (811), and a mounting shell (813) fixed to the top of the mounting frame (3). The number of lifting screws (812) is equal to the number of sliding seats (811) and their positions correspond one-to-one. The upper ends of the two lifting screws (812) are rotatably connected to the mounting shell (813). The lifting mechanism (8) also includes a rotating assembly (82) for driving the two lifting screws (812) to rotate synchronously.

4. The laboratory miniature open mill according to claim 3, characterized in that: The rotating assembly (82) includes a lifting motor (821) fixed on the mounting housing (813) and driving one of the lifting screws (812) to rotate, two synchronous pulleys (822) respectively fixedly sleeved on the two lifting screws (812), and synchronous belts (823) that mesh with the two synchronous pulleys (822). The synchronous pulleys (822) and the synchronous belts (823) are both located inside the mounting housing (813).

5. The laboratory miniature open mill according to claim 1, characterized in that: The mounting frame (3) is provided with two sets of protective mechanisms (9) symmetrically arranged about the lifting frame (4). The protective mechanism (9) includes a shielding component (91). The shielding component (91) includes a protective box (911) fixed on the mounting frame (3) and having a ring structure. The bottom of the protective box (911) is provided with a connecting through hole (10) for the sliding plate (5) and the cutting blade (6) to pass through. The sliding plate (5), the cutting blade (6), and the lifting frame (4) are all located inside the protective box (911). The shielding assembly (91) further includes a protective block (912) that is slidably disposed on the protective box (911) and a pressing block (913) that is fixed on the lifting frame (4) and is in the shape of a right trapezoid. Both of the protective blocks (912) are U-shaped, and the lower blocks of the two protective blocks (912) are in contact with each other. The upper block of the protective block (912) is in contact with the inclined surface of the pressing block (913). The protective mechanism (9) further includes a reset assembly (92) for driving the protective block (912) to reset.

6. The laboratory miniature open mill according to claim 5, characterized in that: The reset assembly (92) includes a mounting plate (921) fixed to the side wall of the protective box (911) and a reset spring (922) fixed between the mounting plate (921) and the protective block (912).

7. The laboratory miniature open mill according to claim 6, characterized in that: The reset assembly (92) also includes a limiting rod (923) that is disposed through the protective block (912) and slidably engaged. One end of the limiting rod (923) is fixed to the protective box (911), and the other end of the limiting rod (923) is fixed to the mounting plate (921).

8. The laboratory miniature open mill according to claim 5, characterized in that: Multiple ball bearings are movably installed on the side wall of the extrusion block (913) near the protective block (912).

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