BOPP (biaxially-oriented polypropylene) film extrusion molding equipment with automatic scraping function

Abstract

The utility model relates to BOPP (Biaxially-Oriented Polypropylene) film extrusion molding equipment capable of automatically scraping materials, which effectively solves the problems that the manual net replacement step is tedious and the manpower is consumed when a net exchanger is used for replacing a net. Which comprises an extruder, the tail end of the extruder is connected with a screen exchanger, the screen exchanger comprises a screen exchanger shell, and is characterized in that two filter screen plungers capable of sliding front and back are rotatably mounted in the screen exchanger shell, and a sliding rail which is arranged between the two filter screen plungers and capable of sliding up and down is mounted in the screen exchanger shell; and a scraping knife capable of sliding back and forth is mounted in the sliding rail. According to the utility model, materials on the plunger are cleaned by rotating the filter screen plunger and sliding the scraping knife, the structure is simple, the use is convenient, and manpower resources during screen replacement are saved.

Description

Technical Field

[0001] The utility model relates to the field of extruder screen replacement, in particular to a BOPP film extrusion molding device with automatic scraping. Background Art

[0002] BOPP is a multi-layer co-extruded film, which is made by co-extruding polypropylene particles into sheets and then stretching them in the longitudinal and transverse directions. The extrusion stage uses the existing mature extruder molding equipment. The extrusion molding equipment mainly uses a motor-driven screw to extrude the heated raw materials through a screen changer at the head of the die.

[0003] Existing screen changers are mainly disc-shaped and plunger-shaped, and the plunger-shaped ones are divided into cylindrical and disc-through types. The present application is mainly for a plunger-type cylindrical screen changer used in extrusion molding equipment when producing BOPP films.

[0004] There are many types of screen changers now, which are divided into manual and automatic ring networks. Automatic ring networks are mainly divided into motor drive, cylinder drive, and hydraulic cylinder drive. The plunger-type cylindrical screen changer used in BOPP film production is driven by a hydraulic cylinder. However, when changing the screen, the hydraulic cylinder is needed to first slide the plunger out of the cylindrical plunger screen changer, and then the worker uses a scraper to scrape off the top layer of material on the plunger, and then uses pliers to peel off the filter on the plunger. Then the worker uses the scraper again to scrape off the bottom layer of material on the plunger, and finally sticks a new filter on the plunger. The hydraulic cylinder drives the plunger to retract into the cylindrical plunger screen changer. Although the push-out and retraction of the filter are automated, the screen replacement is still manual, the operating efficiency is relatively low, and labor is wasted.

[0005] In view of the above problems, the utility model provides a BOPP film extrusion molding equipment with automatic scraping to solve the above problems. Utility Model Content

[0006] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a BOPP film extrusion molding equipment with automatic scraping. The utility model has a novel structure and ingenious conception, and effectively solves the technical problem of requiring manual multiple scraping when changing the screen.

[0007] A BOPP film extrusion molding equipment with automatic scraping includes an extruder, the tail end of the extruder is connected to a screen changer, the screen changer includes a screen changer shell, and is characterized in that two filter plungers that slide back and forth are rotatably installed inside the screen changer shell, a sliding rail that slides up and down between the two filter plungers is installed inside the screen changer shell, and a scraper that slides back and forth is installed inside the sliding rail.

[0008] Preferably, the filter plunger is coaxially connected to a rotating motor, the rear end of the rotating motor is fixedly mounted on a motor fixing plate, the motor fixing plate is connected to a hydraulic cylinder, and the rotating motor and the hydraulic cylinder are connected to a controller.

[0009] Preferably, limiting blocks are fixed on both sides of the sliding rail, and limiting grooves are provided in the housing of the screen changer, and the limiting blocks are slidably installed in the limiting grooves up and down.

[0010] Preferably, a sliding groove is provided inside the sliding rail, and the scraper is slidably installed in the sliding groove. A rotating groove is provided at the front end of the sliding rail, and the front end of the sliding groove is connected to the rotating groove. The front end of the sliding rail is threadedly connected to two limit columns connected to the rotating groove.

[0011] Preferably, a lifting rack is fixed on the limit block on one side of the sliding rail, the lifting rack is meshingly connected with a lifting gear, the lifting gear is coaxially connected with a lifting motor, an angle sensor is coaxially installed on the lifting motor and the lifting gear, the angle sensor is connected to a controller, the lifting motor is connected to the controller, and the lifting motor is fixedly installed in the screen changer housing.

[0012] Preferably, the limiting block on one side of the sliding rail is slidably sleeved and installed on the limiting round rod.

[0013] Preferably, a stretch ring is provided on the fixed sleeve of the scraper.

[0014] The utility model has the following technical effects.

[0015] The utility model can realize cleaning of the materials on the two filter plungers by installing a scraper between the two filter plungers. The filter plungers are rotated by a rotating motor so that the two filter plungers can be scraped and cleaned without the scraper moving. The scraper adjusted over a short distance can gradually clean the materials on the filter plungers in steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0017] Figure 1 It is an overall three-dimensional schematic diagram of the utility model;

[0018] Figure 2 It is a schematic cross-sectional view of the utility model as a whole;

[0019] Figure 3 This is a schematic diagram of the installation of the sliding rail and scraper of the utility model;

[0020] Reference numerals:

[0021] 1; extruder, 2; screen changer housing, 3; filter plunger, 4; sliding rail, 5; scraper, 6; rotating motor, 7; motor fixing plate, 8; hydraulic cylinder, 9; limit block, 10; limit slot, 11; sliding slot, 12; rotating slot, 13; limit column, 14; lifting rack, 15; lifting gear, 16; lifting motor, 17; limit round rod, 18; stretching ring. DETAILED DESCRIPTION

[0022] The above and other technical contents, features and functions of the present invention are described in detail below with reference to the attached Figures 1 to 3 The details of the embodiments will be clearly presented. The contents mentioned in the following embodiments are all based on the drawings in the specification.

[0023] Various exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.

[0024] Embodiment 1: The utility model is an automatic scraping BOPP film extrusion molding equipment, which is mainly used for automatic scraping processing when replacing the filter screen of the plunger type screen changer. The utility model includes an extruder 1, which can plasticize and melt solid materials into a stable and uniform melt and extrude it continuously. The tail end of the extruder 1 is connected to the screen changer, and the screen changer includes a screen changer shell 2, which provides support for internal parts. Two filter screen plungers 3 that can slide back and forth are rotatably installed inside the screen changer shell 2. The two filter screen plungers 3 are distributed up and down and are cylindrical. Multiple rows of filter holes are evenly distributed on the middle cylindrical surface. The cylindrical surfaces at both ends are solid. In normal use, the melt can be The melt flows in the filter holes on the filter plunger 3. When the screen needs to be changed, one filter plunger 3 slides in the screen changer. The solid cylinders at both ends of the filter plunger 3 block the melt, so that it cannot flow and can only flow through the filter holes on the other filter plunger 3. The filter plunger 3 can rotate in the screen changer, and a sliding rail 4 that can slide up and down is installed between the two filter plungers 3 inside the screen changer housing 2. The sliding rail 4 is a long rectangle and can slide up and down in the screen changer housing 2. The sliding rail 4 allows the parts matched and installed inside it to slide telescopically. A scraper 5 that can slide back and forth is installed in the sliding rail 4. The function of the scraper 5 is to clean the material on the filter plunger 3 extending out of the screen changer.

[0025] When changing the screen and scraping the material, a filter plunger 3 extends out from the screen changer, and the worker pulls out the scraper 5 from the sliding rail 4 between the two filter plungers 3, and then adjusts the position of the sliding rail 4 in the screen changer housing 2 up and down, so that the scraper 5 sliding therein can scrape the material on the filter plunger 3, and the material on the filter plunger 3 can be cleaned step by step by adjusting the position of the sliding rail 4. By rotating the filter plunger 3, the scraper 5 can scrape off the material attached to the filter plunger 3, eliminating the tedious steps of manual cleaning, saving a lot of labor resources and cleaning more cleanly.

[0026] Embodiment 2: In order to enable the filter plunger 3 to rotate in the screen changer housing 2, the filter plunger 3 is coaxially connected to a rotating motor 6, and the rotating motor 6 provides a rotating force for the filter plunger 3 to make the filter plunger 3 rotate. The rear end of the rotating motor 6 is fixedly installed on the motor fixing plate 7. The motor fixing plate 7 is in the shape of a rectangular plate. The motor fixing plate 7 provides support for the rotating motor 6. The motor fixing plate 7 is connected to the hydraulic cylinder 8. The hydraulic cylinder 8 can make the filter plunger 3 telescopic. The rotating motor 6 and the hydraulic cylinder 8 are connected to a controller. The controller can control the opening and closing of the rotating motor 6 and the hydraulic cylinder 8. The rotating motor 6 will not contact the screen changer housing 2 when moving under the drive of the hydraulic cylinder 8.

[0027] Embodiment three: In order to make the sliding rail 4 only able to slide up and down in the screen changer housing 2, it is limited in front, back, left and right directions, and limit blocks 9 are fixed on both sides of the sliding rail 4. A limit groove 10 is opened in the screen changer housing 2. The limit groove 10 can limit the limit block 9 so that it can only move up and down but not forward, backward, left and right. The limit block 9 matches the limit groove 10, and the limit block 9 is installed in the limit groove 10 for sliding up and down, so that the sliding rail 4 fixedly connected to the limit block 9 can also move up and down in the screen changer housing 2, and the lifting and lowering of the scraper 5 slidably installed on the sliding rail 4 can be adjusted by adjusting the lifting and lowering of the limit block 9.

[0028] Embodiment 4: In order to prevent the scraper 5 extending out of the sliding rail 4 from retracting and to enable it to be fixed after being extended, a sliding groove 11 is provided inside the sliding rail 4, and the sliding groove 11 can support the parts inserted into the groove to slide. The scraper 5 is slidably installed in the sliding groove 11, so that the scraper 5 can perform telescopic movement in the sliding groove 11, and a rotating groove 12 is provided at the front end of the sliding rail 4. The parts inside the rotating groove 12 can rotate, but cannot move forward and backward. The front end of the sliding groove 11 is connected to the rotating groove 12, so that the scraper 5 can enter the rotating groove 12 through the sliding groove 11, rotate in the rotating groove 12, and limit the front and rear positions at the same time. The front end of the sliding rail 4 is threadedly connected with two limit posts 13 connected to the rotating groove 12, and the limit posts 13 can limit the scraper 5 rotating in the rotating groove 12 to the left and right.

[0029] When in use, the worker pulls out the scraper 5 with a horizontal blade from the sliding rail 4 until the end of the scraper 5 enters the rotating groove 12 at the front end of the sliding rail 4 through the sliding groove 11. The worker then rotates the scraper 5 to change the scraper 5 with a horizontal blade into a vertical blade, and then rotates the limit column 13 threadedly connected to the front end of the sliding rail 4 to extend it into the rotating groove 12. At this time, the end of the scraper 5 is between the two limit columns 13 just in the rotating groove 12. The limit column 13 limits the scraper 5 left and right so that it cannot rotate, and the rotating groove 12 limits the scraper 5 front and back so that it cannot retract.

[0030] Embodiment 5: In order to enable the scraper 5 to automatically adjust the lifting and lowering in steps and save manpower, a lifting rack 14 is fixed on the limit block 9 on one side of the sliding rail 4, and the lifting rack 14 is meshed and connected with a lifting gear 15, and the lifting gear 15 is coaxially connected with a lifting motor 16. When the lifting motor 16 is started, the rotating shaft on the lifting motor 16 drives the lifting gear 15 coaxial with it to rotate, and the lifting gear 15 rotates to drive the lifting rack 14 meshed and connected with it to transmit, and the lifting rack 14 drives the sliding rail 4 fixedly connected to it to transmit, and an angle sensor is installed on the coaxial side of the lifting motor 16 and the lifting gear 15, and the angle sensor is connected to a controller. The angle sensor can transmit the angle information of the rotation of the rotating shaft of the lifting motor 16 to the controller for controlling the lifting displacement, and the lifting motor 16 is connected to a controller, and the controller can control the opening and closing of the lifting motor 16, and the lifting motor 16 is fixedly installed in the screen changer housing 2 to fix it.

[0031] The worker starts the lifting motor 16 through the controller, and the lifting motor 16 drives the lifting gear 15 coaxial therewith to rotate, and then drives the sliding rail 4 to slide up and down through a series of transmissions, and the scraper 5 on the sliding rail 4 also moves synchronously.

[0032] Embodiment 6: In order to prevent the sliding rail 4 from rotating sideways in the limiting groove 10 when the lifting gear 15 drives the sliding rail 4 to transmit up and down, so that it can transmit up and down smoothly, a limiting round rod 17 is slidably mounted on the limiting block 9 on one side of the sliding rail 4.

[0033] Embodiment 7: In order to prevent workers from being accidentally injured by the scraper knife 5 when stretching and contracting the scraper knife 5 and to better apply force when stretching and contracting the scraper knife 5, a stretching ring 18 is fixedly sleeved on the scraper knife 5.

[0034] When the utility model is used as a whole, the worker pulls the scraper 5 with the blade horizontally out of the sliding rail through the stretching ring 18, and rotates the scraper 5 when it cannot be pulled anymore, so that the blade of the scraper 5 changes from horizontal to vertical, and then tightens the limiting column 13 at the front end of the sliding rail 4 and twists it into the rotating groove 12, so that the scraper 5 is limited and fixed in the front, back, left and right directions, and then starts the lifting motor 16 through the controller, so that the scraper 5 can be lifted up and down between the filter plunger 3, and the angle sensor installed on the rotating shaft of the lifting motor 16 can make the lifting motor 16 rotate in stages, so that the scraper 5 can also be lifted in stages, so that it can scrape the material on the filter plunger 3 in stages, and the device replaces manpower with machinery, imitates the manual operation steps of changing the screen, saves human resource costs, and has high cleaning efficiency.

[0035] Although the content of the utility model has been described in detail through the above preferred embodiments, it should be recognized that the above description should not be considered as a limitation of the utility model. After reading the above content, various modifications and substitutions of the utility model will be obvious to those skilled in the art. Therefore, the protection scope of the utility model should be limited by the attached claims.

Claims

1. An automatic scraping BOPP film extrusion molding device, comprising an extruder (1), the tail end of the extruder (1) is connected to a screen changer, the screen changer comprises a screen changer housing (2), characterized in that: Two filter plungers (3) are rotatably mounted inside the screen changer housing (2) and slide forward and backward. A sliding rail (4) is mounted inside the screen changer housing (2) and slides up and down between the two filter plungers (3). A scraper (5) is mounted inside the sliding rail (4) and slides forward and backward.

2. The automatic scraping BOPP film extrusion molding equipment according to claim 1 is characterized in that: The filter screen plunger (3) is coaxially connected to a rotating motor (6), the rear end of the rotating motor (6) is fixedly mounted on a motor fixing plate (7), the motor fixing plate (7) is connected to a hydraulic cylinder (8), and the rotating motor (6) and the hydraulic cylinder (8) are connected to a controller.

3. The automatic scraping BOPP film extrusion molding equipment according to claim 1 is characterized in that: Limiting blocks (9) are fixed on both sides of the sliding rail (4), and limiting grooves (10) are provided in the screen changer housing (2), and the limiting blocks (9) are slidably installed in the limiting grooves (10) up and down.

4. The automatic scraping BOPP film extrusion molding equipment according to claim 1 is characterized in that: A sliding groove (11) is provided inside the sliding rail (4), and the scraper (5) is slidably installed in the sliding groove (11). A rotating groove (12) is provided at the front end of the sliding rail (4), and the front end of the sliding groove (11) is connected to the rotating groove (12). Two limit posts (13) connected to the rotating groove (12) are threadedly connected to the front end of the sliding rail (4).

5. The automatic scraping BOPP film extrusion molding equipment according to claim 3 is characterized in that: A lifting rack (14) is fixed on the limit block (9) on one side of the sliding rail (4); the lifting rack (14) is meshedly connected with a lifting gear (15); the lifting gear (15) is coaxially connected with a lifting motor (16); an angle sensor is coaxially mounted on the lifting motor (16) and the lifting gear (15); the angle sensor is connected to a controller; the lifting motor (16) is connected to the controller; and the lifting motor (16) is fixedly mounted in the screen changer housing (2).

6. The automatic scraping BOPP film extrusion molding equipment according to claim 3, characterized in that: The limit block (9) on one side of the sliding rail (4) is slidably mounted on the limit round rod (17).

7. The automatic scraping BOPP film extrusion molding equipment according to claim 1 is characterized in that: The scraper (5) is fixedly sleeved with a stretch ring (18).

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