Extrusion device for PVC film production

Abstract

The utility model discloses an extrusion device for PVC film production, and belongs to the technical field of PVC film production. The device mainly comprises a mechanical frame, a first extrusion roller is mounted on the mechanical frame through a bearing, and a second extrusion roller is connected to the mechanical frame through a bearing; the scraping assembly comprises two sets of mounting frames mounted on the mechanical frame, one end of each mounting frame is provided with a lantern ring part, a rotating rod movably penetrates through the two sets of lantern ring parts, and a scraping knife is arranged on the rotating rod; rotating discs are mounted at the two ends of the rotating rod, each rotating disc is provided with a sleeving part, a fixing seat is mounted on each sleeving part, a screw rod is in threaded connection with each fixing seat, and two butt joint parts are mounted on the rotating rod; and the cleaning unit is provided with a scraping block for cleaning the surface of the scraping knife and a driving motor for driving the scraping block to move in the linear direction of the scraping knife. According to the extrusion device for PVC film production, the blank of self-cleaning of the scraping knife is filled through the cleaning unit, the labor and time cost is saved, cleaning is thorough, and it is guaranteed that the scraping knife works well.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of PVC film production, in particular to an extrusion device for PVC film production. BACKGROUND

[0002] PVC film production involves raw material selection, various production processes and strict quality detection. In the production process of PVC film, the extrusion step is a core step. Whether it is a common calendering process or a blow molding process, the performance of the extrusion device for PVC film production directly affects the product quality and production efficiency.

[0003] For example, the patent with the authorization announcement No. CN215791236U discloses a high-cover PVC calendering film production equipment, which comprises a mechanical frame, a motor, an extrusion roller one, an extrusion roller three, an extrusion roller two and a cleaning device. The PVC material waste on the surface of the extrusion roller two is scraped off to avoid leaving material waste on the surface of the extrusion roller two, the extrusion roller one and the extrusion roller three due to the deformation of the PVC film at high temperature.

[0004] The above patent cleans the surface of the extrusion roller by a scraping knife. However, since the scraping knife is in contact with the high-temperature and sticky PVC material waste for a long time, the waste is easily attached to the surface of the scraping knife, which accumulates day by day, affects the scraping effect of the scraping knife and increases the wear degree. However, the device structure design does not consider the convenient cleaning requirement of the scraping knife. When cleaning, the operator often needs to use special tools to spend a certain amount of time and energy to scrape off the attached waste, which is relatively troublesome. Therefore, it is necessary to provide an extrusion device for PVC film production to solve the above problems.

[0005] It should be noted that the above information disclosed in the background section of the present application is only used to understand the background technology of the concept of the present application, and therefore, it can contain information which does not constitute prior art. CONTENT OF THE UTILITY MODEL

[0006] Based on the above problems existing in the prior art, the present application solves the problem of providing an extrusion device for PVC film production to solve the problem that the above patent cleans the surface of the extrusion roller by a scraping knife. Since the scraping knife is in contact with the high-temperature and sticky PVC material waste for a long time, the waste is easily attached to the surface of the scraping knife, which accumulates day by day, affects the scraping effect of the scraping knife and increases the wear degree. However, the device structure design does not consider the convenient cleaning requirement of the scraping knife. When cleaning, the operator often needs to use special tools to spend a certain amount of time and energy to scrape off the attached waste, which is relatively troublesome.

[0007] The technical scheme adopted by the present application to solve its technical problems is: the PVC film production extrusion device, including the mechanical frame, the bearing of the mechanical frame is provided with the extrusion roller one, the bearing of the mechanical frame is connected with the extrusion roller two, the left side of the middle part of the extrusion roller two is movably connected with the extrusion roller three;Scraping assembly, the scraping assembly is installed on the mechanical frame, the scraping assembly includes two groups of mounting brackets installed on the mechanical frame, one end of the mounting bracket has a collar part, two groups of the collar part movably penetrates the rotating rod, the rotating rod has a scraping knife;Both ends of the rotating rod are provided with rotating discs, the rotating disc has a sleeve part, the sleeve part is provided with a fixed seat, the fixed seat is threadedly connected with a screw rod, one end of the screw rod is fixedly provided with a knob, the rotating rod is provided with two groups of butt joints, the butt joint is provided with a screw hole matched with the screw rod;Cleaning unit, the cleaning unit is installed on the mechanical frame, the cleaning unit has a scraping block for cleaning the surface of the scraping knife, and a driving motor for driving the scraping block to move along the straight line direction of the scraping knife.

[0008] Further, one end of the extrusion roller one movably penetrates the mechanical frame, the side surface of the mechanical frame is provided with a motor, and the output end of the motor is connected with one end of the extrusion roller one.

[0009] Further, the butt joint on the upper end of the rotating rod is defined as the first butt joint, and the butt joint on the lower end of the rotating rod is defined as the second butt joint, and the screw rod is threadedly connected with the second butt joint in the initial state.

[0010] Further, the inner side surface of the mechanical frame is movably connected with a cooling rod one at the upper end, and movably connected with a cooling rod two at the lower end, one side surface of the mechanical frame is connected with a PVC material processor, the rear side surface of the PVC material processor is movably connected with a rotating shaft at the upper end, and the side surface of the PVC material processor close to the rotating shaft is provided with a discharge port.

[0011] Further, the cleaning unit includes a fixed frame installed on the mechanical frame, a screw rod is installed on the bearing of the fixed frame, a driving motor is installed at one end of the fixed frame, and the output end of the driving motor is connected with the screw rod.

[0012] Further, two groups of limiting rods are installed on the fixed frame, a sliding seat is threadedly connected on the screw rod, the sliding seat is movably sleeved on the two groups of limiting rods, a scraping block is threadedly connected on the sliding seat through bolts, and the scraping block is in contact with the scraping knife in the initial state.

[0013] The beneficial effects of the present application are: the PVC film production extrusion device provided by the present application fills the blank of cleaning the material scraping knife itself through the cleaning unit, and the automatic cleaning greatly improves the efficiency, saves the labor and time cost, and the cleaning is complete, which ensures that the material scraping knife always works well, and further ensures the efficient and stable cleaning of the waste residue on the surface of the extrusion roller two.

[0014] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be further described below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0015] The drawings accompanying the specification of the present application form a part thereof, serve to provide further understanding of the present application, and together with the description of the exemplary embodiments of the present application and the explanation thereof serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0016] Figure 1 It is the overall schematic diagram of the PVC film production extrusion device in the present application;

[0017] Figure 2 It is the bottom structure schematic diagram of Figure 1 ;

[0018] Figure 3 It is the local structure schematic diagram of Figure 2 ;

[0019] Figure 4 It is the enlarged schematic diagram of A of Figure 3 ;

[0020] In the drawings, various reference signs represent:

[0021] 1, PVC material processor; 11, discharge port; 12, rotating shaft; 2, extrusion assembly; 21, mechanical frame; 22, extrusion roller one; 23, extrusion roller two; 24, extrusion roller three; 25, cooling rod one; 26, cooling rod two; 3, material scraping assembly; 31, mounting frame; 32, rotating rod; 33, rotating disc; 34, fixed seat; 35, screw rod; 36, knob; 37, butt joint part; 38, fixed frame; 39, driving motor; 310, lead screw; 311, sliding seat; 312, limiting rod; 313, material scraping block; 314, bolt; 315, material scraping knife. DETAILED DESCRIPTION

[0022] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0023] In order to enable personnel in the technical field to better understand the scheme of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should fall within the scope of protection of the present application.

[0024] As shown in Figures 1-4 The present application provides an extrusion device for PVC film production, which comprises an extrusion assembly 2 for calendering the PVC film, and the extrusion assembly 2 comprises a mechanical frame 21, and a first extrusion roller 22 is bearing-mounted on the mechanical frame 21, one end of the first extrusion roller 22 is movably penetrated through the mechanical frame 21, and a motor (not shown in the figure) is fixedly mounted on the side surface of the mechanical frame 21, the output end of the motor is connected with one end of the first extrusion roller 22, and the first extrusion roller 22 is suitable for rotating with the output end of the motor to perform primary calendering on the PVC film.

[0025] A second extrusion roller 23 is bearing-connected with the lower end of the left side surface of the first extrusion roller 22 on the mechanical frame 21, and a third extrusion roller 24 is movably connected with the left side surface of the middle of the second extrusion roller 23, the second extrusion roller 23 and the third extrusion roller 24 are similar in structure to the first extrusion roller 22, and motors are connected with one end of the second extrusion roller 23 and the third extrusion roller 24 to drive the second extrusion roller 23 and the third extrusion roller 24 to rotate, multiple groups of extrusion rollers work cooperatively to perform multiple calendering on the PVC film, gradually adjust the thickness and flatness of the film, and improve the quality and performance of the film.

[0026] Meanwhile, a scraping assembly 3 is mounted on the mechanical frame 21, which is used for cleaning the waste attached to the surface of the second extrusion roller 23, and the scraping assembly 3 comprises two groups of mounting brackets 31 fixedly mounted on the mechanical frame 21, the mounting bracket 31 is "L" shaped, one end of the mounting bracket 31 has a sleeve ring part (not marked in the figure), and a rotating rod 32 is movably penetrated between the two sleeve ring parts, the rotating rod 32 has a scraping knife 315, and the rotating rod 32 is suitable for rotating between the two sleeve ring parts to drive the scraping knife 315 to approach or move away from the second extrusion roller 23.

[0027] Rotating discs 33 are mounted on both ends of the rotating rod 32, the rotating disc 33 has a sleeve part, the rotating disc 33 is threadedly connected with both ends of the rotating rod 32 through the sleeve part, the sleeve part is arranged in close contact with the sleeve ring part, and the diameter of the sleeve part is larger than that of the sleeve ring part to avoid the rotating rod 32 from being pulled out of the two sleeve ring parts.

[0028] And the fixed seat 34 is fixedly installed on the sleeve part, and a threaded rod 35 is threadedly connected to the fixed seat 34, one end of the threaded rod 35 is fixedly installed with a knob 36, the knob 36 facilitates the threaded rod 35 to be applied with torque, so as to drive the threaded rod 35 to gradually approach or move away from the rotating rod 32, meanwhile, two groups of butt joints 37 are symmetrically fixedly installed on the rotating rod 32, and screw holes (not marked in the figure) adapted to the threaded rod 35 are formed in the butt joints 37;

[0029] It should be noted that, with reference to Figure 4 The butt joint 37 at the upper end of the rotating rod 32 is defined as the first butt joint, and the butt joint 37 at the lower end of the rotating rod 32 is defined as the second butt joint, in the initial state, the threaded rod 35 is threadedly connected with the second butt joint, that is, the scraper 315 moves away from the second extrusion roller 23;

[0030] Therefore, when it is needed to clean the waste residues on the surface of the second extrusion roller 23, the rotating disc 33 is held and rotated by 180 degrees, at this time, the scraper 315 approaches the second extrusion roller 23 and has a small gap between the scraper 315 and the second extrusion roller 23, at this time, the knob 36 is screwed, so as to drive the threaded rod 35 to rotate into the screw hole in the butt joint 37, so as to fix the scraper 315, thereby when the second extrusion roller 23 rotates, the waste residues on the surface of the second extrusion roller 23 can be cleaned;

[0031] And the cooling rod one 25 is movably connected to the inner side upper end of the mechanical frame 21, the cooling rod two 26 is movably connected to the inner side lower end of the mechanical frame 21, the PVC material processor 1 is fixedly connected to one side of the mechanical frame 21, the rotating shaft 12 is movably connected to the upper end of the rear side of the PVC material processor 1, and the discharge port 11 is formed in one side of the PVC material processor 1 close to the rotating shaft 12;

[0032] Therefore, the PVC material needed to be processed is added into the PVC material processor 1, then the PVC film needed to be calendered is discharged from the discharge port 11, then the PVC film is preliminarily guided by the rotating shaft 12, moves on the lower surface of the rotating shaft 12, and then the motor is started, so as to drive the rotating of the first extrusion roller 22, the second extrusion roller 23 and the third extrusion roller 24, then the PVC film moves from the front to the gap between the third extrusion roller 24 and the second extrusion roller 23, is preliminarily extruded and calendered, then the film is cooled on the surface of the cooling rod two 26, then moves from the rear to the gap between the first extrusion roller 22 and the second extrusion roller 23, is twice calendered, and then is cooled on the surface of the cooling rod one 25, so as to realize the calendering of the PVC film, when the PVC film moves, the existence of the rotating shaft 12 prevents the PVC film from rubbing against other objects, so as to affect the quality of the PVC film;

[0033] To address the issue of waste residue adhering to the surface of the scraper 315 after prolonged use, which is difficult to clean due to the scraper 315 rubbing against the surface of the extrusion roller 23, such as... Figures 3-4 As shown, a cleaning unit is installed on the mechanical frame 21. The cleaning unit includes a fixed frame 38 fixedly installed on the mechanical frame 21. The fixed frame 38 is concave and a lead screw 310 is mounted on the fixed frame 38 with a bearing. A drive motor 39 is fixedly installed at one end of the fixed frame 38. The output end of the drive motor 39 is connected to the lead screw 310 to drive the lead screw 310 to rotate.

[0034] Two sets of limiting rods 312 are fixedly installed on the fixed frame 38. At the same time, a sliding seat 311 is threadedly connected to the lead screw 310. The sliding seat 311 is movably sleeved on the two sets of limiting rods 312. A scraper block 313 is threadedly connected to the sliding seat 311 by bolts 314. The scraper block 313 is in contact with the scraper blade 315 in the initial state.

[0035] When the drive motor 39 starts, its output torque drives the lead screw 310 to rotate stably. This allows the sliding seat 311 to move smoothly along the axial direction of the lead screw 310. When it is necessary to clean the waste residue on the surface of the scraper 315, the drive motor 39 is started, the lead screw 310 begins to rotate, and the sliding seat 311 moves along the axial direction of the lead screw 310. Since the scraper block 313 is fixedly connected to the sliding seat 311, the scraper block 313 also moves accordingly, and the side that contacts the scraper 315 will scrape and clean the waste residue attached to the surface of the scraper 315. This improves the efficiency of cleaning the waste residue on the surface of the scraper 315. Compared with manual cleaning, it not only saves a lot of time and labor costs, but also has a more thorough cleaning effect, effectively ensuring that the scraper 315 is always in good working condition, thereby ensuring the high efficiency and stability of cleaning the waste residue on the surface of the extrusion roller 23, and improving the quality and efficiency of the entire PVC film production process. Meanwhile, the scraper block 313 is connected to the sliding seat 311 by bolts 314, which facilitates disassembly and replacement after the scraper block 313 wears out, further enhancing the maintainability and practicality of the equipment.

[0036] It should also be noted that since the size of the scraper block 313 is much smaller than that of the scraper blade 315, even after the scraper block 313 cleans the waste residue on the surface of the scraper blade 315, there will still be waste residue on its surface. And because the scraper block 313 is small, manual cleaning will not take too much time.

[0037] In summary: in use, first put the PVC material into the PVC material processor 1, and the treated PVC film is discharged from the discharge port 11 and is initially guided by the rotating shaft 12 and moves along the lower surface thereof. The motor is started, and the extrusion roller one 22, the extrusion roller two 23 and the extrusion roller three 24 are respectively rotated under the driving of the respective motors. The PVC film first enters the gap between the extrusion roller three 24 and the extrusion roller two 23 for primary calendering, and then enters the gap between the extrusion roller one 22 and the extrusion roller two 23 for secondary calendering, during which the film is cooled by the cooling rod one 25 on the upper end of the inner side of the mechanical frame 21 and the cooling rod two 26 on the lower end thereof to stabilize the physical properties and complete the calendering of the PVC film. During the extrusion process, if waste residues are attached to the surface of the extrusion roller two 23, the rotating disc 33 of the rotating scraping assembly 3 can be rotated to drive the rotating rod 32 and the scraping knife 315 to approach the extrusion roller two 23, the knob 36 is tightened to fix the scraping knife 315, and the waste residues are cleaned by the rotation of the extrusion roller two 23. After long-term use, the waste residues attached to the surface of the scraping knife 315 are cleaned by the cleaning unit, the driving motor 39 drives the screw rod 310 to rotate, the sliding seat 311 moves along the axial direction of the screw rod 310, and then the scraping block 313 scrapes the waste residues on the surface of the scraping knife 315;

[0038] The cleaning unit fills the gap of cleaning the scraping knife 315 itself, and the automatic cleaning greatly improves the efficiency, saves the labor and time cost, and completely cleanses the scraping knife 315 to ensure that the scraping knife 315 always works well and then ensures the efficient and stable cleaning of the waste residues on the surface of the extrusion roller two 23.

[0039] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Extrusion device for the production of PVC films, characterized in that: The utility model relates to a PVC material processing device, including: Mechanical frame (21), bearing installation is carried to extrusion roller one (22) on the mechanical frame (21), bearing connection is carried to extrusion roller two (23) on the mechanical frame (21), the left side middle part swing joint of extrusion roller two (23) carries extrusion roller three (24); Scraping assembly (3), the scraping assembly (3) is installed on the mechanical frame (21), and the scraping assembly (3) includes two groups of mounting frames (31) installed on the mechanical frame (21), one end of the mounting frame (31) has a collar part, and two groups of the collar part swing and pass through the rotating rod (32), and the rotating rod (32) has a scraping knife (315) on it; Both ends of the rotating rod (32) are provided with rotating discs (33), and the rotating disc (33) has a sleeve part, a fixed seat (34) is installed on the sleeve part, a screw rod (35) is threadedly connected to the fixed seat (34), one end of the screw rod (35) is fixedly provided with a knob (36), and two groups of butt joints (37) are installed on the rotating rod (32), and the butt joint (37) is provided with a screw hole matched with the screw rod (35); The cleaning unit is installed on the mechanical frame (21), and the cleaning unit has a scraping block (313) for cleaning the surface of the scraping knife (315), and a drive motor (39) for driving the scraping block (313) to move along the straight line direction of the scraping knife (315).

2. The extrusion device for PVC film production according to claim 1, characterized in that: One end of the extrusion roller one (22) swing penetrates the mechanical frame (21), and a motor is installed on the side surface of the mechanical frame (21), and the output end of the motor is connected with one end of the extrusion roller one (22).

3. The extrusion device for PVC film production according to claim 2, characterized in that: The butt joint (37) on the upper end of the rotating rod (32) is defined as the first butt joint, and the butt joint (37) on the lower end of the rotating rod (32) is defined as the second butt joint, and the screw rod (35) is threadedly connected with the second butt joint in the initial state.

4. The extrusion device for PVC film production according to claim 3, characterized in that: The inner side surface of the mechanical frame (21) is swing connected with a cooling rod one (25) on the upper end, the inner side surface of the mechanical frame (21) is swing connected with a cooling rod two (26) on the lower end, one side surface of the mechanical frame (21) is connected with a PVC material processor (1), the rear side surface of the PVC material processor (1) is swing connected with a rotating shaft (12) on the upper end, and one side of the PVC material processor (1) close to the rotating shaft (12) is provided with a discharge port (11).

5. The extrusion device for PVC film production according to claim 4, characterized in that: The cleaning unit includes a fixed frame (38) installed on the mechanical frame (21), a lead screw (310) is installed on the fixed frame (38), a drive motor (39) is installed on one end of the fixed frame (38), and the output end of the drive motor (39) is connected with the lead screw (310).

6. The extrusion device for PVC film production according to claim 5, characterized in that: Two groups of limiting rods (312) are installed on the fixing frame (38), a screw rod (310) is threadedly connected with a sliding seat (311), the sliding seat (311) is movably sleeved on the two groups of limiting rods (312), the sliding seat (311) is threadedly connected with a scraping block (313) through a bolt (314), and the scraping block (313) is in contact with the scraping knife (315) in the initial state.

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