Side feeding type single-screw extruder for plastic processing

Abstract

The utility model provides a lateral feeding type single screw extruder for plastic processing, which comprises a base and support columns, the support columns are fixedly connected to the left end and the right end of the upper side of the base, and the upper ends of the support columns are fixedly connected with a conveying cylinder. When the extruder is used, raw materials for plastic processing are firstly put into the discharging hopper, then the sealing cover above the filling pipe at the left end above the feeding box is taken down, auxiliary materials are poured into the left end part of the partition plate in the feeding box from the filling pipe, then the sealing cover is installed again, the driving motor is started to enable the conveying screw rod to rotate in the conveying cylinder, and then the raw materials are fed into the discharging hopper. And meanwhile, the air cylinder at the left end of the front side of the feeding box is started, the push plate at the rear end is driven to move backwards to push the auxiliary materials into the connecting frame, and the auxiliary materials and the plastic processing raw materials conveyed rightwards move rightwards together to conduct extrusion processing of plastic products. According to the utility model, auxiliary materials can be conveniently replaced without pausing the extruder, so that the working efficiency of the extruder is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plastic processing, specifically is single screw extruder for plastic processing. BACKGROUND

[0002] Single screw extruder is mainly used for extruding soft, hard polyvinyl chloride, polyethylene and other thermoplastic plastics, and can process various plastic products, such as blown film, extruded tube, pressed plate, silk ribbon and the like, and can also be used for melt granulation.

[0003] However, due to the need of process, it is usually necessary to input auxiliary materials into the extrusion cylinder, that is, to feed the extrusion cylinder from the middle section. At this time, the common practice in the industry is to open a feeding port in the middle section of the extrusion cylinder, and then forcibly extrude the auxiliary materials into the extrusion cylinder. However, by this way, the feeding amount of auxiliary materials is usually only about 10%, and the feeding efficiency is low.

[0004] As disclosed in Chinese patent CN209478918U, the middle section side feeding device applied to single screw extruder, the feeding slot expands the capacity of the barrel inside at the middle section feeding port, so as to facilitate the auxiliary materials to enter the barrel, improve the feeding amount of auxiliary materials from the middle section feeding port into the barrel, and improve the production efficiency. The bottom diameter of the second section is smaller than that of the first section, which expands the space of the barrel at the middle section feeding port. At this time, the pressure of the main materials at the second section is smaller, so it is beneficial for the auxiliary materials to quickly enter the barrel and improve the feeding amount.

[0005] However, when auxiliary feeding is carried out through the feeding device at the outer end of the barrel, if other auxiliary materials need to be replaced in the middle, the extruder needs to be closed first, the auxiliary materials in the feeding device need to be replaced, and then the extruder needs to be restarted for plastic processing and extrusion work, thereby affecting the processing efficiency of plastic products.

[0006] Therefore, it is urgent to provide a side feeding type single screw extruder for plastic processing, which can quickly replace the added auxiliary materials. INVENTION CONTENTS

[0007] The utility model aims at providing a side feeding type single screw extruder for plastic processing, to solve the problem of affecting the processing efficiency of plastic products when auxiliary feeding is carried out through the feeding device at the outer end of the barrel, if other auxiliary materials need to be replaced in the middle, the extruder needs to be closed first, the auxiliary materials in the feeding device need to be replaced, and then the extruder needs to be restarted for plastic processing and extrusion work.

[0008] In order to achieve the above object, the utility model provides the following technical scheme: the side feeding formula single screw extruder for plastics processing, including base and support column, the support column fixed connection is in the left and right two ends of base upside, the upper end of support column is fixedly connected with the delivery cylinder, the left end of delivery cylinder is installed with speed reducer, the left end of speed reducer is installed with drive motor, the upper end left of delivery cylinder is installed with the feeding hopper for preventing plastics processing raw materials, the right end of speed reducer is installed with the conveying screw, the outer end of delivery cylinder is provided with feeding mechanism.

[0009] The feeding mechanism includes a connecting frame fixedly connected to the front end of the outer side of the delivery cylinder, a feeding box connected to the front end of the connecting frame, air cylinders installed on the left and right ends of the front side of the feeding box, a push plate fixedly connected to the rear end of the output shaft of the air cylinder, an extrusion plate fixedly connected to the rear end of the inside of the feeding box, a partition plate fixedly connected to the middle position of the inside of the feeding box, a baffle connected to the rear end of the inside of the feeding box, a fixed plate fixedly connected to the front of the baffle on the upper side of the feeding box, a first threaded rod screwedly connected to the inside of the fixed plate, a rotating handle fixedly connected to the front side of the first threaded rod, a filling pipe connected to the front upper end of the inside of the feeding box, a cover connected to the upper end of the filling pipe, and mounting units connected to the left and right sides of the connecting frame and the feeding box.

[0010] Further improvements are that the mounting units include rear connecting plates fixedly connected to the front ends of the left and right sides of the connecting frame, second threaded rods fixedly connected to the front sides of the rear connecting plates, fixed rings connected to the outer sides of the second threaded rods, and front connecting plates fixedly connected to the rear ends of the left and right sides of the feeding box.

[0011] Further improvements are that the outer side of the push plate is slidingly connected to the inner side of the feeding box and the outer side of the partition plate, and an extrusion hole is formed in the inside of the extrusion plate, so that by starting the air cylinder and moving the output shaft rearward, the push plate is moved rearward along the inner side of the feeding box, and the auxiliary material in the feeding box is extruded into the inside of the connecting frame through the extrusion hole in the inside of the extrusion plate.

[0012] Further improvements are that through grooves are formed at the left and right ends of the top end of the feeding box in front of the extrusion plate, the outer side of the baffle is slidingly connected to the inner side of the through groove, insertion holes are formed in the upper and lower ends of the inside of the baffle, and the rear outer side of the first threaded rod is inserted into the inner side of the insertion hole, so that by moving the first threaded rod rearward into the insertion hole in the upper end of the inside of the baffle, the baffle can fix and close the front end of the extrusion plate.

[0013] Further improvement lies in that the feeding box upper end front is symmetrically provided with an inlet hole, and a filler pipe is fixed to the inlet hole on the upper side of the feeding box, an outer thread is formed on the upper end outer side of the filler pipe, an inner thread is formed on the inner side of the cover, and the upper end outer side of the filler pipe is threadedly connected with the inner side of the cover, so that the auxiliary material can be poured into the feeding box from the filler pipe after the cover is removed from the upper end of the filler pipe by rotating the cover.

[0014] Further improvement lies in that a circular hole is formed at the middle position of the inner side of the front connecting plate, the outer side of the second threaded rod is slidably connected with the inner side of the circular hole, an inner thread is formed on the inner side of the fixing ring, the outer side of the second threaded rod is threadedly connected with the inner side of the fixing ring, and the rear side of the fixing ring abuts against the front side of the front connecting plate, so that the fixing ring is threadedly connected to the outer side of the second threaded rod, and the front connecting plate can be fixed between the rear connecting plate and the fixing ring after the rear side of the fixing ring contacts the front side of the front connecting plate.

[0015] Further improvement lies in that the rubber pads are fixedly connected to the inner side of the through slot on the upper end of the feeding box and the front side of the connecting frame, so that the contact position between the baffle and the inner side of the through slot is sealed, and the contact position between the connecting frame and the feeding box is sealed.

[0016] In summary, the application discloses a side feeding type single-screw extruder for plastic processing.

[0017] When the extruder works, the auxiliary material is added to the inside of the feeding box at the left end or the right end of the baffle, and then the corresponding cylinder is started to extrude the auxiliary material into the conveying cylinder. When the auxiliary material needs to be replaced, the cover above the other end of the baffle in the inside of the feeding box is removed, the replaced auxiliary material is filled into the feeding box, and at this time, the baffle at the rear end of this part is located in front of the extrusion plate. The part is closed, then when the time to be replaced arrives, the cylinder that is pushing the material is closed, the baffle behind the cylinder is slid along the through slot to the inside of the feeding box, this part is closed, and the baffle at the other end is pulled up, the cylinder at the front end of this part is opened, and the replaced auxiliary material is pushed through the extrusion plate into the connecting frame and then into the inside of the conveying cylinder. Therefore, through the switching mode, the work of the extruder can not be temporarily stopped during the replacement of the auxiliary material, and the plastic processing efficiency of the extruder is improved.

[0018] Further, by rotating the fixing ring on the outer side of the second threaded rod, the front end of the front connecting plate is no longer limited after the fixing ring is removed from the outer side of the fixing ring, and then the feeding box can be pulled forward to be removed from the front end of the connecting frame, so that the feeding box can be quickly disassembled from the front end of the connecting frame, and the maintenance or cleaning of the feeding box is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1This is a schematic diagram of the main structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the connecting frame structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the internal structure of the feeding box at the right end of this utility model;

[0022] Figure 4 This is a schematic diagram of the internal structure of the lower end of the feeding box of this utility model;

[0023] Figure 5 for Figure 3 Enlarged view of point A;

[0024] Figure 6 for Figure 4 Enlarged view of point B.

[0025] In the diagram: 1. Base; 2. Support column; 3. Conveying cylinder; 4. Reducer; 5. Drive motor; 6. Discharge hopper; 7. Conveying screw; 801. Connecting frame; 802. Feeding box; 803. Push plate; 804. Extrusion plate; 805. Partition plate; 806. Baffle plate; 807. Fixing plate; 808. First threaded rod; 809. Rotating handle; 810. Cylinder; 811. Packing tube; 812. Cover; 901. Rear connecting plate; 902. Second threaded rod; 903. Fixing ring; 904. Front connecting plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figures 1-6 The present invention provides a technical solution: a side-feed single-screw extruder for plastic processing, comprising a base 1 and a support column 2. The support column 2 is fixedly connected to the left and right ends of the upper side of the base 1. A conveying cylinder 3 is fixedly connected to the upper end of the support column 2. A reducer 4 is installed at the left end of the conveying cylinder 3. A drive motor 5 is installed at the left end of the reducer 4. A discharge hopper 6 for preventing plastic processing raw materials is installed on the upper left side of the conveying cylinder 3. A conveying screw 7 is installed at the right end of the reducer 4. A feeding mechanism is provided at the outer end of the conveying cylinder 3.

[0028] The feeding mechanism comprises a connecting frame 801 fixedly connected to the front end of the outer side of the conveying cylinder 3, a feeding box 802 connected to the front end of the connecting frame 801, air cylinders 810 installed at the left and right ends of the front side of the feeding box 802, a push plate 803 fixedly connected to the rear end of the output shaft of the air cylinder 810, an extrusion plate 804 fixedly connected to the rear end inside of the feeding box 802, a partition plate 805 fixedly connected to the middle position inside of the feeding box 802, the outer side of the push plate 803 being in sliding connection with the inner side of the feeding box 802 and the outer side of the partition plate 805, and an extrusion hole being formed in the inside of the extrusion plate 804, so that when the extruder is working, the output shaft of the air cylinder 810 is started to move rearward, the push plate 803 is driven to move rearward along the inner side of the feeding box 802, and the auxiliary material in the feeding box 802 is extruded into the inside of the connecting frame 801 through the extrusion hole in the inside of the extrusion plate 804, and then moves rightward together with the plastic raw material in the connecting frame 801 to be extruded and formed.

[0029] A baffle plate 806 is connected to the rear end inside of the feeding box 802, a fixed plate 807 is fixedly connected to the front side of the baffle plate 806, a first threaded rod 808 is threadedly connected to the inside of the fixed plate 807, a rotating handle 809 is fixedly connected to the front side of the first threaded rod 808, a through slot is formed at the left and right ends of the top end of the feeding box 802 in front of the extrusion plate 804, the outer side of the baffle plate 806 is in sliding connection with the inner side of the through slot, insertion holes are formed in the inside of the baffle plate 806 at the upper and lower ends, and the rear end of the outer side of the first threaded rod 808 is inserted into the inner side of the insertion hole, so that after the baffle plate 806 is moved downward along the through slot to the front end of the extrusion plate 804 inside the feeding box 802, the baffle plate 806 is fixed to close the front end of the extrusion plate 804 by moving the first threaded rod 808 rearward into the insertion hole in the upper end of the baffle plate 806, and the baffle plate 806 is fixed to the upper end of the feeding box 802 by inserting the first threaded rod 808 into the insertion hole in the lower end of the baffle plate 806, so that the extrusion plate 804 is no longer blocked.

[0030] A filler pipe 811 is connected to the front end of the upper end of the feeding box 802, a cover 812 is connected to the upper end of the filler pipe 811, feed holes are symmetrically formed in the front of the upper end of the feeding box 802, the filler pipe 811 is fixed to the feed holes on the upper side of the feeding box 802, external threads are formed on the upper end of the outer side of the filler pipe 811, internal threads are formed on the inner side of the cover 812, and the upper end of the outer side of the filler pipe 811 is threadedly connected to the inner side of the cover 812, so that the auxiliary material can be poured into the feeding box 802 from the filler pipe 811 for conveying by removing the cover 812 from the upper end of the filler pipe 811 by rotating the cover 812.

[0031] The left and right sides of the connecting frame 801 and the feeding box 802 are connected with mounting units, the mounting units comprise rear connecting plates 901 fixedly connected to the left and right sides of the front end of the connecting frame 801, the front side of the rear connecting plate 901 is fixedly connected with a second threaded rod 902, the outer side of the second threaded rod 902 is connected with a fixing ring 903, the rear end of the left and right sides of the feeding box 802 is fixedly connected with a front connecting plate 904, a circular hole is formed in the middle of the inside of the front connecting plate 904, the outer side of the second threaded rod 902 is slidingly connected with the inside of the circular hole, the inside of the fixing ring 903 is provided with an internal thread, the outer side of the second threaded rod 902 is threadedly connected with the inside of the fixing ring 903, the rear side of the fixing ring 903 abuts against the front side of the front connecting plate 904, so that after the feeding box 802 is placed on the front side of the connecting frame 801 and the front connecting plate 904 is moved to the front side of the rear connecting plate 901, the second threaded rod 902 will pass through the circular hole, then the fixing ring 903 is threadedly connected to the outer side of the second threaded rod 902, until the rear side of the fixing ring 903 contacts the front side of the front connecting plate 904, the front connecting plate 904 can be fixed between the rear connecting plate 901 and the fixing ring 903, and the installation of the feeding box 802 on the front end of the connecting frame 801 is completed.

[0032] The inside of the through slot on the upper end of the feeding box 802 and the front side of the connecting frame 801 are fixedly connected with rubber pads, so that the contact between the baffle 806 and the inside of the through slot is kept sealed, and the contact between the connecting frame 801 and the feeding box 802 is kept sealed.

[0033] Working principle: in the use of the extruder, first put the plastic processing raw materials into the hopper 6, then remove the cover 812 above the left end of the filling pipe 811 on the feeding box 802, pour the auxiliary materials into the left end of the partition plate 805 in the feeding box 802 from the filling pipe 811, then reattach the cover 812, pull up the baffle 806 on the left side of the partition plate 805, until the hole in the baffle 806 is located at the rear end of the first threaded rod 808, then move the first threaded rod 808 to the right to fix the baffle 806, start the drive motor 5 to make the conveying screw 7 rotate in the conveying cylinder 3, and at the same time, start the cylinder 810 on the left end of the front side of the feeding box 802 to drive the rear push plate 803 to move backward and push the auxiliary materials into the connecting frame 801, and then move rightward with the plastic processing raw materials for plastic product extrusion processing, when the auxiliary materials in the left end of the feeding box 802 are almost exhausted or need to be replaced with new auxiliary materials, open the cover 812 above the other filling pipe 811, pour the new auxiliary materials into the right end of the feeding box 802 from the filling pipe 811, then reattach the cover 812, when the auxiliary materials in the left end of the feeding box 802 are almost exhausted or the conveying cylinder 3 needs new auxiliary materials, close the cylinder 810 that is pushing materials, then slide the baffle 806 behind the cylinder 810 along the slot to the feeding box 802, and at the same time, pull up the baffle 806 on the right end, open the cylinder 810 in front of this part, push the auxiliary materials in the right end of the partition plate 805 through the extrusion plate 804 into the connecting frame 801 and then into the interior of the conveying cylinder 3.

[0034] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... " does not, without more constraints, preclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Claims

1. A side feeding single screw extruder for plastic processing, comprising a base (1) and a supporting column (2) fixedly connected to the left and right ends of the upper side of the base (1), characterized in that: The upper end of the support column (2) is fixedly connected with a conveying cylinder (3), the left end of the conveying cylinder (3) is provided with a speed reducer (4), the left end of the speed reducer (4) is provided with a driving motor (5), the upper end of the left side of the conveying cylinder (3) is provided with a feeding hopper (6) for placing plastic raw materials, the right end of the speed reducer (4) is provided with a conveying screw (7), and the outer end of the conveying cylinder (3) is provided with a feeding mechanism. The feeding mechanism comprises a connecting frame (801) fixedly connected to the outer front end of the conveying cylinder (3), a feeding box (802) connected to the front end of the connecting frame (801), air cylinders (810) mounted on the front left and right ends of the feeding box (802), a push plate (803) fixedly connected to the output shaft rear end of the air cylinder (810), an extrusion plate (804) fixedly connected to the rear end of the inside of the feeding box (802), a partition plate (805) fixedly connected to the middle position of the inside of the feeding box (802), a baffle (806) connected to the rear end of the inside of the feeding box (802), a fixed plate (807) fixedly connected to the upper side of the feeding box (802) in front of the baffle (806), a first threaded rod (808) screwedly connected to the inside of the fixed plate (807), a rotating handle (809) fixedly connected to the front side of the first threaded rod (808), a filling pipe (811) connected to the upper end of the feeding box (802), and a cover (812) connected to the upper end of the filling pipe (811).

2. The side-fed single screw extruder for plastics processing according to claim 1, characterized in that: The mounting unit comprises rear connecting plates (901) fixedly connected to the front ends of the left and right sides of the connecting frame (801), second threaded rods (902) fixedly connected to the front sides of the rear connecting plates (901), fixed rings (903) connected to the outer sides of the second threaded rods (902), and front connecting plates (904) fixedly connected to the rear ends of the left and right sides of the feeding box (802).

3. The side-fed, single-screw extruder for plastics processing according to claim 1, characterized in that: The outer side of the push plate (803) is slidably connected to the inner side of the feeding box (802) and the outer side of the partition plate (805), and the inside of the extrusion plate (804) is provided with an extrusion hole.

4. The side-fed, single-screw extruder for plastics processing of claim 1, wherein: The top end of the feeding box (802) is provided with a through groove at the left and right ends in front of the extrusion plate (804), the outer side of the baffle (806) is slidably connected to the inner side of the through groove, the inside of the baffle (806) is provided with a jack at the upper and lower ends, and the rear end of the first threaded rod (808) is inserted into the inside of the jack.

5. The side-fed, single-screw extruder for plastics processing of claim 1, wherein: The feeding box (802) is provided with a feeding hole in front of the upper end in a symmetrical manner, the filling pipe (811) is fixed to the feeding hole on the upper side of the feeding box (802), the upper end of the filling pipe (811) is provided with an external thread, the inside of the cover (812) is provided with an internal thread, and the upper end of the filling pipe (811) is screwedly connected to the inside of the cover (812).

6. The side-fed, single-screw extruder for plastics processing according to claim 2, characterized in that: The front connecting plate (904) is internally provided with a circular hole, the outer side of the second threaded rod (902) is in sliding connection with the inner side of the circular hole, the inner side of the fixing ring (903) is internally provided with an internal thread, the outer side of the second threaded rod (902) is in threaded connection with the inner side of the fixing ring (903), and the rear side of the fixing ring (903) is in abutment with the front side of the front connecting plate (904).

7. The side-fed, single-screw extruder for plastics processing of claim 1, wherein: The inner side of the through groove of the upper end of the feeding box (802) and the front side of the connecting frame (801) are fixedly connected with rubber pads.

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