High-elasticity EVA (Ethylene Vinyl Acetate) foaming material open mill

Abstract

The utility model discloses a high elasticity EVA foam material open mill, relates to open mill technical field, including mounting groove and shell, said mounting groove and shell are both set up U-shaped structure, and the mounting groove is fixedly connected in the shell, and the outside of mounting groove and the inside of shell form cavity; the two sides of the mounting groove are each fixedly connected with two sliding rails which are vertically and symmetrically distributed, and an adjusting sliding block is slidably connected between every two sliding rails. According to the high-elasticity EVA foaming material open mill, two linkage shafts are meshed with bevel teeth at the two ends of a linkage shaft at the bottom of a mounting groove through bevel teeth to rotate, so that the three linkage shafts are kept at the same rotating speed, and second lead screws are meshed with the linkage shafts through bevel teeth, so that the rotating speeds of the two second lead screws are kept consistent; further, the moving distance of the adjusting sliding block between the two sliding rails is kept consistent, and the situation that the two ends cannot move synchronously due to different stress of the two ends during operation of the main extrusion roller is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of open mills, and particularly relates to an open mill for high-elastic EVA foam materials. Background Technique

[0002] An EVA open mill is a device specifically used for processing ethylene-vinyl acetate copolymers. Through the frictional and shearing actions between two rotors, raw materials with different components can be precisely mixed to ensure the uniform dispersion of EVA and its additives.

[0003] During the operation of the open mill, the raw materials will move between two roller shafts, and the mixing of the raw materials is achieved by continuously squeezing the extrusion roller. During the mixing process of the raw materials, it is necessary to keep the raw materials rotating around an extrusion roller. However, during the operation of the open mill, it is easy for some raw materials to rotate outside the two extrusion rollers respectively, affecting the processing efficiency of the raw materials.

[0004] In order to overcome the above defects, the prior art (Chinese patent with application number: CN22 first lead screw (16) 2925U, application date: June 8, 2023) discloses an EVA plastic open mill. While driving the first extrusion roller to rotate by a first motor, it will also drive a rotating shaft to rotate. The rotation of the rotating shaft causes the rotating push rod to push the horizontal adjusting rod. With the pulling force of the spring, the movable connecting plate and the cutting blade can reciprocate and stretch on the rectangular sleeve frame, quickly cutting the raw materials on the first extrusion roller at one time, and ensuring the flatness of the raw material cut, and there will be no skew in the cutting of the raw materials.

[0005] The prior art realizes the cutting of raw materials by the reciprocating stretching of the cutting blade on the rectangular sleeve frame to prevent the material from moving on the two extrusion rollers. In the actual operation process, the direct rigid contact between the vertical tool and the extrusion roller easily causes indentations on the extrusion roller, affecting the processing effect of the open mill, and it is easy to generate uneven forces at both ends during the operation of the extrusion roller, resulting in the inability to synchronously adjust both ends of the extrusion roller. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide an open mill for high-elastic EVA foam materials to solve the problems in the above background technique that the direct rigid contact between the vertical tool and the extrusion roller easily causes indentations on the extrusion roller, affecting the processing effect of the open mill, and it is easy to generate uneven forces at both ends during the operation of the extrusion roller, resulting in the inability to synchronously adjust both ends of the extrusion roller.

[0007] To achieve the above purpose, the present utility model provides the following technical solution: An open mill for high-elastic EVA foam materials, including an installation groove and a housing. Both the installation groove and the housing are set in a U-shaped structure, and the installation groove is fixedly connected inside the housing, and a cavity is formed between the outer side of the installation groove and the inner side of the housing;

[0008] Both sides of the installation groove are fixedly connected with two vertically symmetrically distributed slide rails, and an adjustment slider is slidably connected between every two slide rails. The bottom of the adjustment slider is slidably connected with a threaded sleeve, and the threaded sleeve extends to the bottom of the slide rail and slides inside the bottom slide rail. A second lead screw is rotatably connected inside the threaded sleeve, and a linkage shaft is meshed between the two second lead screws through bevel gears. There are three linkage shafts, and the three linkage shafts are distributed in a U-shaped structure outside the installation groove.

[0009] Preferably, two symmetrically distributed mounting sleeves are fixedly connected to one side of the housing, and a motor is fixedly connected inside each mounting sleeve. The output ends of the motors are respectively rotatably connected with a main extrusion roller and a sub-extrusion roller. Both the main extrusion roller and the sub-extrusion roller are located inside the installation groove, and both ends of the main extrusion roller are rotatably connected inside the adjustment slider.

[0010] Preferably, two symmetrically distributed support frames are fixedly connected to the top of the installation groove, and a height-limiting rod is fixedly connected between the tops of the two support frames. Two symmetrically distributed positioning rods are fixedly connected between the two support frames, and a protective cover is fixedly connected between the two support frames, and the protective cover is located on top of the two positioning rods.

[0011] Preferably, symmetrically distributed reserved holes are provided on both sides of the installation groove, and the reserved holes are located between the two slide rails, and both ends of the main extrusion roller extend outside the installation groove through the inside of the reserved holes.

[0012] Preferably, a scraping plate is fixedly connected to the top of the installation groove, and both ends of the scraping plate are fixedly connected to both ends of the top of the installation groove. The lower end of the scraping plate is attached to the top of the sub-extrusion roller, and the groove of the scraping plate faces the direction of the main extrusion roller.

[0013] Preferably, openings are provided inside both of the support frames, and the openings are located at the bottom of the protective cover. A first lead screw is rotatably connected between the two support frames, and both ends of the first lead screw are rotatably connected inside the support frames through the openings, and the thread directions at both ends of the first lead screw are opposite.

[0014] Preferably, limiting plates are threadedly connected to the outer sides of both ends of the first lead screw, and two sliding sleeves are fixedly connected to the upper ends of the two limiting plates, and the two sliding sleeves are slidably connected to the outer sides of the positioning rods, and the first lead screw is located at the bottom of the protective cover.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] This kind of open mill for high - elasticity EVA foaming material has two linkage shafts that are meshed and rotated with the bevel gears at both ends of the linkage shaft at the bottom of the installation groove, so that the three linkage shafts maintain the same rotation speed. Moreover, the second lead screw and the linkage shaft are meshed with each other through bevel gears, so that the rotation speeds of the two second lead screws are consistent. Furthermore, the distances that the adjusting sliders move between the two slide rails are kept the same, preventing uneven forces at both ends when the main extrusion roller operates and thus ensuring that its two ends can move synchronously.

[0017] Furthermore, since a scraping plate is arranged on the outer side of the auxiliary extrusion roller, when the EVA foaming material moves to the outer side of the auxiliary extrusion roller, due to the fitting of the scraping plate with the outer side of the auxiliary extrusion roller, when the EVA foaming material adheres to the outer side of the auxiliary extrusion roller and rotates with it, at this time, the scraping plate scrapes off the EVA foaming material located on the outer side of the auxiliary extrusion roller, and the EVA foaming material scraped off by the scraping plate from the second lead screw will fall back between the main extrusion roller and the auxiliary extrusion roller for re - processing.

[0018] Furthermore, by rotating the first lead screw, two limit plates are driven to move in opposite directions on the outer side of the first lead screw. Since the limit plates are in contact with the top of the main extrusion roller, at this time, the width of the EVA foaming material moving on the outer side of the main extrusion roller will be limited by the distance between the two limit plates, thereby adjusting the discharge width of the EVA foaming material after processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a three - dimensional structural schematic diagram of the present utility model;

[0020] Figure 2 is a structural schematic diagram of the installation groove of the present utility model;

[0021] Figure 3 is a structural schematic diagram of the outer shell of the present utility model;

[0022] Figure 4 is a structural schematic diagram of the slide rail of the present utility model;

[0023] Figure 5 is a structural schematic diagram of the first lead screw of the present utility model;

[0024] Figure 6 is a sectional structural schematic diagram of the installation groove of the present utility model.

[0025] In the figure: 1. Installation groove; 2. Outer shell; 3. Installation sleeve; 4. Motor; 5. Slide rail; 6. Adjusting slider; 7. Threaded sleeve; 8. Main extrusion roller; 9. Auxiliary extrusion roller; 10. Support frame; 11. Height - limiting rod; 12. Positioning rod; 13. Protective cover; 14. Reserved hole; 15. Scraping plate; 16. First lead screw; 17. Limit plate; 18. Sliding sleeve; 19. Second lead screw; 20. Linkage shaft. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Embodiment 1:

[0028] Please refer to Figure 1 - Figure 6 , the present utility model provides the following technical solutions:

[0029] An open mill for a highly elastic EVA foaming material, including an installation groove 1 and a housing 2. Both the installation groove 1 and the housing 2 are set in a U-shaped structure, and the installation groove 1 is fixedly connected to the inside of the housing 2, and a cavity is formed between the outside of the installation groove 1 and the inside of the housing 2.

[0030] On both sides of the installation groove 1, two vertically symmetrically distributed slide rails 5 are fixedly connected. A regulating slider 6 is slidably connected between every two slide rails 5. The bottom of the regulating slider 6 is slidably connected with a threaded sleeve 7, and the threaded sleeve 7 extends to the bottom of the slide rail 5 and slides inside the bottom slide rail 5. A second lead screw 19 is rotatably connected inside the threaded sleeve 7, and the two second lead screws 19 are meshed with a linkage shaft 20 through bevel gears. There are three linkage shafts 20, and the three linkage shafts 20 are distributed in a U-shaped structure outside the installation groove 1.

[0031] On one side of the housing 2, two symmetrically distributed mounting sleeves 3 are fixedly connected. A motor 4 is fixedly connected inside each mounting sleeve 3. The output ends of the motors 4 are respectively rotatably connected with a main extrusion roller 8 and a secondary extrusion roller 9. Both the main extrusion roller 8 and the secondary extrusion roller 9 are located inside the installation groove 1, and both ends of the main extrusion roller 8 are rotatably connected inside the regulating slider 6.

[0032] On the top of the installation groove 1, two symmetrically distributed support frames 10 are fixedly connected. A height-limiting rod 11 is fixedly connected between the tops of the two support frames 10. Two symmetrically distributed positioning rods 12 are fixedly connected between the two support frames 10. A protective cover 13 is fixedly connected between the two support frames 10, and the protective cover 13 is located on the top of the two positioning rods 12.

[0033] On both sides of the installation groove 1, symmetrically distributed reserved holes 14 are provided. The reserved holes 14 are located between the two slide rails 5, and both ends of the main extrusion roller 8 extend to the outside of the installation groove 1 through the inside of the reserved holes 14.

[0034] A scraper 15 is fixedly connected to the top of the installation groove 1, and both ends of the scraper 15 are fixedly connected to both ends of the top of the installation groove 1. The lower end of the scraper 15 is in contact with the top of the auxiliary extrusion roller 9, and the groove of the scraper 15 faces the direction of the main extrusion roller 8.

[0035] Openings are provided inside both support frames 10, and the openings are located at the bottom of the protective cover 13. A first lead screw 16 is rotatably connected between the two support frames 10, and both ends of the first lead screw 16 are rotatably connected to the inside of the support frames 10 through the openings, and the thread directions at both ends of the first lead screw 16 are opposite.

[0036] Limit plates 17 are threadedly connected to the outer sides of both ends of the first lead screw 16, and two sliding sleeves 18 are fixedly connected to the upper ends of the two limit plates 17, and the two sliding sleeves 18 are slidably connected to the outer side of the positioning rod 12. At the same time, the first lead screw 16 is located at the bottom of the protective cover 13.

[0037] Embodiment 2:

[0038] On the basis of Embodiment 1, its specific working principle is as follows:

[0039] For this open mill for a highly elastic EVA foaming material, by rotating the rotating handle of the second lead screw 19 located outside the housing 2, the second lead screw 19 is driven to rotate inside the threaded sleeve 7 by the handle. When the second lead screw 19 rotates inside the threaded sleeve 7, at this time, the threaded sleeve 7 will move outside the second lead screw 19, and then the threaded sleeve 7 drives the adjustment slider 6 to move between the two slide rails 5. Since both ends of the main extrusion roller 8 are located inside the adjustment slider 6, the horizontal position of the main extrusion roller 8 inside the installation groove 1 is adjusted, realizing the adjustment of the distance between the main extrusion roller 8 and the auxiliary extrusion roller 9. During the process of the second lead screw 19 rotating and driving the main extrusion roller 8 to move inside the installation groove 1, the second lead screw 19 drives the linkage shafts 20 vertically distributed on both sides of the installation groove 1 to rotate through the bevel gears on its outer side, and the two linkage shafts 20 are meshed and rotated with the bevel gears at both ends of the linkage shafts 20 at the bottom of the installation groove 1 through bevel gears, so that the three linkage shafts 20 maintain the same rotation speed, and the second lead screw 19 and the linkage shafts 20 are meshed with each other through bevel gears, so that the rotation speeds of the two second lead screws 19 are the same, and then the distances that the adjustment slider 6 moves between the two slide rails 5 are the same, preventing uneven forces on both ends of the main extrusion roller 8 during operation and causing its two ends to not move synchronously;

[0040] When the distance between the main extrusion roller 8 and the auxiliary extrusion roller 9 is adjusted, at this time, the EVA foaming material is put between the main extrusion roller 8 and the auxiliary extrusion roller 9. At this time, the EVA foaming material will be extruded by the main extrusion roller 8 and the auxiliary extrusion roller 9, and at the same time, the main extrusion roller 8 and the auxiliary extrusion roller 9 will rotate in opposite directions;

[0041] During the process of processing EVA foam material by the main extrusion roller 8 and the auxiliary extrusion roller 9, it is necessary to keep the EVA foam material rotating outside the main extrusion roller 8, so as to maintain the direction of the EVA foam material when discharging. Since the EVA foam material has a certain amount of heat during the processing process, the EVA foam material is likely to adhere to the outside of the auxiliary extrusion roller 9 during the movement between the main extrusion roller 8 and the auxiliary extrusion roller 9. Since a scraper 15 is provided on the outside of the auxiliary extrusion roller 9, when the EVA foam material moves to the outside of the auxiliary extrusion roller 9, due to the fitting of the scraper 15 with the outside of the auxiliary extrusion roller 9, when the EVA foam material adheres to the outside of the auxiliary extrusion roller 9 and rotates with it, at this time, the scraper 15 scrapes off the EVA foam material located on the outside of the auxiliary extrusion roller 9, and the EVA foam material scraped off by the scraper 15 from the second lead screw 19 will fall back between the main extrusion roller 8 and the auxiliary extrusion roller 9 for reprocessing;

[0042] By rotating the first lead screw 16, the two limit plates 17 are driven to move in opposite directions on the outside of the first lead screw 16. Since the limit plates 17 are in contact with the top of the main extrusion roller 8, at this time, the width of the EVA foam material moving outside the main extrusion roller 8 will be limited by the distance between the two limit plates 17, thereby adjusting the discharging width of the EVA foam material after processing.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-elastic EVA foam material open mill, comprising a mounting groove (1) and a shell (2), wherein the mounting groove (1) and the shell (2) are both arranged in a U-shaped structure, and the mounting groove (1) is fixedly connected to the inside of the shell (2), and a cavity is formed between the outer side of the mounting groove (1) and the inner side of the shell (2); Features: Two vertically symmetrically distributed slide rails (5) are fixedly connected to both sides of the installation groove (1), and an adjusting slider (6) is slidably connected between each two slide rails (5). A threaded sleeve (7) is slidably connected to the bottom of the adjusting slider (6), and the threaded sleeve (7) extends to the bottom of the slide rail (5), and the threaded sleeve (7) slides inside the slide rail (5) located at the bottom. A second screw rod (19) is rotatably connected inside the threaded sleeve (7), and a linkage shaft (20) is meshed between the two second screw rods (19) through bevel teeth, and three linkage shafts (20) are provided, and the three linkage shafts (20) are distributed in a U-shaped structure outside the installation groove (1).

2. A high elastic EVA foam material mill according to claim 1, characterized in that: Two symmetrically distributed mounting sleeves (3) are fixedly connected to one side of the housing (2), and a motor (4) is fixedly connected inside each mounting sleeve (3). The output end of the motor (4) is rotatably connected to a main squeezing roller (8) and an auxiliary squeezing roller (9), respectively. The main squeezing roller (8) and the auxiliary squeezing roller (9) are both located inside the mounting groove (1), and both ends of the main squeezing roller (8) are rotatably connected to the inside of the adjusting slider (6).

3. A high elastic EVA foam material mill according to claim 1, characterized in that: Two symmetrically distributed support frames (10) are fixedly connected to the top of the installation groove (1), and a limited height rod (11) is fixedly connected between the tops of the two support frames (10), two symmetrically distributed positioning rods (12) are fixedly connected between the two support frames (10), and a protective cover (13) is fixedly connected between the two support frames (10), and the protective cover (13) is located on the tops of the two positioning rods (12).

4. The high-elastic EVA foam material mill according to claim 1, characterized in that: The installation groove (1) is provided with symmetrically distributed reserved holes (14) on both sides, and the reserved holes (14) are located between the two slide rails (5), and the two ends of the main squeezing roller (8) extend through the reserved holes (14) to the outside of the installation groove (1).

5. The high-elastic EVA foam material mill according to claim 1, characterized in that: A scraper (15) is fixedly connected to the top of the mounting groove (1), and two ends of the scraper (15) are respectively fixedly connected to the two ends of the top of the mounting groove (1), the lower end of the scraper (15) is in contact with the top of the auxiliary squeezing roller (9), and the groove of the scraper (15) faces the direction of the main squeezing roller (8).

6. The high-elastic EVA foam material mill according to claim 3, characterized in that: Both support frames (10) are provided with openings therein, and the openings are located at the bottom of the protective cover (13); a first screw rod (16) is rotatably connected between the two support frames (10), and both ends of the first screw rod (16) are rotatably connected to the inside of the support frames (10) through the openings, and the thread directions of the two ends of the first screw rod (16) are opposite.

7. A high elastic EVA foam material mill according to claim 6, characterized in that: The outer sides of both ends of the first screw rod (16) are threadedly connected to the limit plates (17), and the upper ends of the two limit plates (17) are fixedly connected to two sliding sleeves (18), and the two sliding sleeves (18) are slidably connected to the outer sides of the positioning rod (12), and the first screw rod (16) is located at the bottom of the protective cover (13).

Images