CN109333911B

CN109333911B - A gear pump type rubber continuous injection device

Info

Publication number: CN109333911B
Application number: CN201811388157.0A
Authority: CN
Inventors: 边慧光; 王孔烁; 赵百顺; 范文超
Original assignee: Qingdao University of Science and Technology
Current assignee: Qingdao University of Science and Technology
Priority date: 2018-11-21
Filing date: 2018-11-21
Publication date: 2024-06-11
Anticipated expiration: 2038-11-21
Also published as: CN109333911A

Abstract

The invention discloses a gear pump type rubber continuous injection device, comprising a Y-shaped extruder, a guide rail and a mold, wherein the discharge end of the Y-shaped extruder is connected with a screen-changing filter device, the screen-changing filter device is connected with a gear pump, the gear pump is connected with the mold through a nozzle, the Y-shaped extruder is mounted on the guide rail through a first mounting seat, the screen-changing filter device and the gear pump are mounted on the guide rail through a second mounting seat, so as to realize unlimited extrusion of rubber material, and at the same time, through two pressurizations of the extrusion unit and the gear pump unit, a considerable injection pressure can be given to the rubber material, so that the rubber material can fill the mold cavity more effectively, and the existence of the filter device can effectively improve the quality of the rubber material, so the whole device is very suitable for large-scale injection rubber products, and can improve production efficiency and significantly reduce production costs.

Description

Gear pump type rubber continuous injection device

Technical Field

The invention relates to the technical field of rubber industrial production equipment, in particular to a gear pump type continuous rubber injection device.

Background

In China, research work of rubber injection machines has been over 30 years, but the rubber injection machines in China are generally small in mold locking force, small in injection capacity, single in produced variety and obvious in series blank due to the limitation of the general industrial level and other reasons so far, and the rubber injection molding machines are developed and undergo the processes from a plunger type injection molding machine to a screw plunger type injection molding machine and then to a screw reciprocating type injection molding machine.

In recent years, higher requirements are put on the quality of rubber products, and the market demand for large-scale rubber products is greatly increased, and the screw reciprocating type injection machine has the defect that the capacity and the pressure of the injection products are exposed to certain limits:

1. The screw is continuously moved backwards in the plasticizing process, the plasticized sizing material advances towards the machine head and is continuously accumulated in the charging barrel of the machine head, and the larger the product is, the larger the backward movement amount of the machine barrel screw is. When the amount of screw backward movement is excessive, plasticization of the compound is affected, and thus the capacity is limited.

2. Because of the poor flowability of the compound, a large-thrust injection device must be used to generate sufficient injection pressure to inject the compound with large capacity into the mold cavity, but a large gap exists between the screw and the barrel, and excessive pressure can cause countercurrent and leakage flow, which in turn can affect the pressure increase, and the injection of large-sized rubber products is limited.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a gear pump type continuous rubber injection device which can effectively solve the problems of the background art.

The technical scheme adopted for solving the technical problems is as follows:

The gear pump type rubber continuous injection device comprises a Y-shaped extruder, a guide rail and a die, wherein the discharge end of the Y-shaped extruder is connected with a screen changing filter device, the screen changing filter device is connected with a gear pump, and the gear pump is connected with the die through a nozzle;

The Y-shaped extruder is arranged on the guide rail through a first mounting seat, and the screen changing filter device and the gear pump are arranged on the guide rail through a second mounting seat.

Further, the Y-shaped extruder comprises a driving motor, the driving motor is connected with a speed reducer through a front coupling, the speed reducer is connected with a gear box through a rear coupling, the gear box is connected with a double-cone machine barrel, a feeding hopper is arranged on the double-cone machine barrel, the feeding hopper is connected with a screw machine barrel through a machine barrel mounting seat, and a long-cone screw and a short-cone screw are arranged in the double-cone machine barrel.

Further, trade net filter equipment including trade net organism and the rotating electrical machines of setting in trade net organism bottom, trade net organism inner wall ring shape to arrange has a plurality of cooling water course, be provided with the location cavity on the lateral wall of trade net organism, the output shaft upper key of rotating electrical machines is connected with trades net fan seat, trade and be provided with two awl filter screen bodies on the net fan seat, the one end of awl filter screen body and screw rod barrel junction is provided with the sealing ring, the screw rod barrel is installed flexible cover with trade net organism junction.

Further, a shaft driving seat is arranged in the positioning cavity, an annular spray head is arranged on the shaft driving seat and connected with a cooling water channel through a pipeline, and a discharge port is arranged at the bottom of the positioning cavity.

Further, the gear pump comprises a pump body, a gear shaft, a left coupling, a right coupling, a left motor, a right motor, a leakage hopper and a cooling water pipe, wherein two gear shafts are arranged in the pump body, the gear shaft positioned at the inner top of the pump body is connected with the left motor through the left coupling, the gear shaft positioned at the inner bottom of the pump body is connected with the right motor through the right coupling, the leakage hopper is arranged at the joint of the gear shaft and the left coupling and the right coupling, and the cooling water pipe is positioned in the inner wall of the pump body opposite to the gear shaft.

Further, the inside opposite direction that has set gradually of screw rod barrel is extruded chamber, taper pipe and is sent the chamber with the post, the inside two mutual interlock of extruding screw rods that are provided with of opposite direction extrusion chamber, the post is sent intracavity portion equidistant a plurality of cross flow board that is provided with, the post is sent the intracavity wall and is provided with the direction spiral vane, just the inside first circulating pipe and the second circulating pipe that are provided with of direction spiral vane, first circulating pipe passes through the pipe connection cooling water course, the second circulating pipe extends to on the screw rod barrel outer wall.

Further, the two extrusion screws are staggered and combined by a dense screw pitch section and a loose screw pitch section, the spiral meshing mode of the two extrusion screws is that the dense screw pitch section is meshed with the loose screw pitch section, the screw pitch of the dense screw pitch section is 1/3 of the screw pitch of the loose screw pitch section, and one ends of the two extrusion screws are respectively connected to the long cone screw and the short cone screw.

Further, the telescopic sleeve comprises a conical ring, the conical ring is installed on the screw machine barrel through a spring, and the inner diameter of the conical ring is consistent with the inner diameter of the screw machine barrel.

Further, the guide rail comprises a base with a groove and a slide rail, the first installation seat and the second installation seat are fixedly installed on the slide rail, a fixed guide rail is arranged at the bottom of the die, and the fixed guide rail is connected to the slide rail through a hydraulic rod.

Compared with the prior art, the invention has the beneficial effects that:

The rubber material can be continuously added, so that the infinite extrusion of the rubber material can be realized, meanwhile, the rubber material can be given quite large injection pressure through the two pressurizing of the extrusion unit and the gear pump unit, so that the mold cavity is filled with the rubber material more effectively, the quality of the rubber material can be effectively improved through the existence of the filtering device, the whole device is very suitable for large-scale injection rubber products, the production efficiency can be improved, and the production cost is obviously reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic top view of the present invention;

FIG. 3 is a schematic view of a longitudinal section plate structure of the screen changing filter device of the invention;

FIG. 4 is a schematic view showing a longitudinal sectional structure of a screw barrel of the present invention;

FIG. 5 is a schematic view of the longitudinal cross-sectional structure of the column feed chamber of the present invention;

fig. 6 is a schematic view of the structure of the cone filter body of the present invention.

Reference numerals in the drawings:

A 1-Y type extruder; 2-a guide rail; 3-a mold; 4-screen changing filter device; 5-gear pump; 6-nozzle; 7-a first mounting seat; 8-a second mounting seat; 9-a hydraulic rod; 10-fixing a guide rail; 11-a telescopic sleeve;

101-driving a motor; 102-a decelerator; 103-a gearbox; 104-a double cone barrel; 105-a feeding hopper; 106-screw barrels; 107-opposing extrusion chambers; 108-taper pipe gradual pipe collection; 109-column feed chamber; 110-extrusion screw; 111-cross flow plates; 112-guiding the rotary vane; 113-a first circulation pipe; 114-a second circulation tube; 115-long cone screw; 116-short cone screw;

201-a grooved base; 202-a slide rail;

401-screen changing machine body; 402-rotating electrical machines; 403-cooling water channel; 404-positioning the cavity; 405-screen changing fan base; 406-cone filter screen body; 407-sealing ring; 408-a shaft drive mount; 409-ring spray head; 410-discharge port;

501-a pump body; 502-gear shaft; 503-left coupling; 504-right coupling; 505-left motor; 506-right motor; 507-hopper.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 6, the invention provides a gear pump type rubber continuous injection device, which comprises a Y-shaped extruder 1, a guide rail 2 and a die 3, wherein the discharge end of the Y-shaped extruder 1 is connected with a screen changing filter device 4, the screen changing filter device 4 is connected with a gear pump 5, and the gear pump 5 is connected with the die 3 through a nozzle 6;

The Y-shaped extruder 1 is mounted on the guide rail 2 through a first mounting seat 7, and the screen changing filter device 4 and the gear pump 5 are mounted on the guide rail 2 through a second mounting seat 8.

The first installation seat 7 and the second installation seat 8 of the rectangular table-shaped structure are fixedly connected to form a base and are installed on the guide rail 2, an extrusion unit is arranged on the upper surface of the first installation seat 7, and a screen changing filter device 4 and a gear pump 5 are arranged on the upper surface of the second installation seat 8; the first mounting seat 7 and the second mounting seat 8 are respectively connected with the screen changing filter device 4 and the gear pump by bolts; the screen-changing filter device 4 and the gear pump 5 and the nozzle 6 are connected by flanges; central axes of the screen changing filter device 4, the gear pump 5 and the nozzle 6 are all positioned on the same straight line; the mould 3 is mounted on the rail 2.

The Y-shaped extruder 1 comprises a driving motor 101, the driving motor 101 is connected with a speed reducer 102 through a front coupling, the speed reducer 102 is connected with a gear box 103 through a rear coupling, the gear box 103 is connected with a double-cone machine barrel 104, a feeding hopper 105 is arranged on the double-cone machine barrel 104, the feeding hopper 105 is connected with a screw machine barrel 106 through a machine barrel mounting seat, and a long-cone screw 115 and a short-cone screw 116 are arranged in the double-cone machine barrel 104.

The screen changing filter device 4 comprises a screen changing machine body 401 and a rotating motor 402 arranged at the bottom of the screen changing machine body 401, wherein a plurality of cooling water channels 403 are annularly arranged on the inner wall of the screen changing machine body 401, a positioning cavity 404 is arranged on the side wall of the screen changing machine body 401, an output shaft of the rotating motor 402 is connected with a screen changing fan seat 405 in a key manner, two cone filter screen bodies 406 are arranged on the screen changing fan seat 405, a sealing ring 407 is arranged at one end of the junction of the cone filter screen bodies 406 and a screw machine barrel 106, and a telescopic sleeve 11 is arranged at the junction of the screw machine barrel 106 and the screen changing machine body 401.

When the sizing material filters, temperature variation causes the impurity in the sizing material to pile up on the awl filter screen body 406, through the rotation of driving rotating electrical machines 402, the screen changing fan seat 405 that is arranged in the location cavity 404 rotates around the axle, at pivoted in-process, lateral pressure can extrude flexible cover, thereby contact flexible cover 11 and sealing ring 407's combination, and flexible cover 11 can carry out the flush cut to the sizing material on awl filter screen body 406 surface, when first awl filter screen body 406 is completely rotated out, the position of flexible cover 11 is gone into to the second awl filter screen body 406 in the very card, make new awl filter screen body 406 rotate to the position of flexible cover 11, thereby guarantee the seamless switching of two awl filter screen bodies 406, and this screen changing step is gone on in the inside of barrel, traditional push-pull screen changing is easy to deviate from the sizing material, simultaneously along with the increase of screen changing number of times, can't guarantee the leakproofness of extruding the barrel, this screen changing filter device 4 then can fine solution this problem.

Further, the shaft driving seat 408 is arranged inside the positioning cavity 404, the annular spray nozzle 409 is arranged on the shaft driving seat 408, the annular spray nozzle 409 is connected with the cooling water channel 403 through a pipeline, the bottom of the positioning cavity 404 is provided with the discharge port 410, the cooling water channel 403 is communicated with the annular spray nozzle 409, after one screen changing operation is performed, the annular spray nozzle 409 can automatically clean the cone filter screen 406 in time, the step of manually cleaning is omitted, the rotating frequency of the rotating motor 402 can be fixedly arranged, thereby realizing the automation of filtering screen changing cleaning, avoiding shutdown cleaning and improving the glue outlet rate of the machine.

The gear pump 5 comprises a pump body 501, a gear shaft 502, a left shaft coupling 503, a right shaft coupling 504, a left motor 505, a right motor 506, a hopper 507 and a cooling water pipe, wherein two gear shafts 502 are arranged in the pump body 501, the gear shaft 502 positioned at the inner top of the pump body 501 is connected with the left motor 505 through the left shaft coupling 503, the gear shaft 502 positioned at the inner bottom of the pump body 501 is connected with the right motor 506 through the right shaft coupling 504, the hopper 507 is arranged at the joint of the gear shaft 502 and the left shaft coupling 503 and the right shaft coupling 504, and the cooling water pipe is positioned in the inner wall of the pump body 5 opposite to the position of the gear shaft 502.

The inside of the screw machine barrel 106 is sequentially provided with a counter extrusion cavity 107, a taper pipe gradually-receiving cavity 108 and a column conveying cavity 109, two mutually-meshed extrusion screws 110 are arranged in the counter extrusion cavity 107, a plurality of cross flow plates 111 are arranged in the column conveying cavity 109 at equal intervals, guide rotary blades 112 are spirally arranged on the inner wall of the column conveying cavity 109, a first circulating pipe 113 and a second circulating pipe 114 are arranged in the guide rotary blades 112, the first circulating pipe 113 is connected with a cooling water channel 403 through a pipeline, and the second circulating pipe 113 extends to the outer wall of the screw machine barrel 106.

In the invention, the two extrusion screws 110 are both in staggered combination of a dense pitch section and a loose pitch section, the spiral meshing mode of the two extrusion screws is that the dense pitch section meshes with the loose pitch section, the pitch of the dense pitch section is 1/3 of the pitch of the loose pitch section, one ends of the two extrusion screws are respectively connected with the long cone screw 115 and the short cone screw 116, and the meshing mode of the dense pitch section and the conveying pitch section enables sizing materials to generate staggered storage space of sizing materials when entering the meshing section.

The telescopic sleeve 11 comprises a conical ring which is mounted on the screw machine barrel through a spring, and the inner diameter of the conical ring is consistent with the inner diameter of the screw machine barrel 106.

The guide rail 2 comprises a base 201 with a groove and a slide rail 202, the first mounting seat 7 and the second mounting seat 8 are fixedly mounted on the slide rail 202, a fixed guide rail 10 is arranged at the bottom of the die 3, and the fixed guide rail 10 is connected to the slide rail through a hydraulic rod 10.

The first mounting seat 7, the second mounting seat 8 and the guide rail 2 are made of stainless steel; the screen changing filter device 4 is used as a filtering and conveying place of sizing materials; the gear pump 5 is a place for plasticizing, extruding, shearing and pressurizing the sizing material; the front coupler, the rear coupler, the left coupler and the right coupler are all rigid couplers; the speed reducer is a gear speed reducer; the gear box is a speed ratio gear box; the double-cone machine barrel and the screw machine barrel are made of common steel, and the screw machine barrel is connected with the screen changing machine body;

The feeding hopper, the machine barrel mounting seat, the long cone screw and the short cone screw are made of the same materials, the length of the long cone screw is 1095mm, and the length of the short cone screw is 654mm;

The gears of the gear shaft are of a herringbone structure, so that the mutual friction of the gears can be avoided, the abrasion of the gears is reduced, and the service lives of the gears and the gear pump are prolonged; the cooling water channel and the cooling water pipe are made of the same material, and are used as a flow channel of cooling water for cooling heat generated by extrusion of the sizing material; the gear pump body, the left motor and the right motor are all gear motors; the nozzle is made of 45 steel.

The working principle of the invention is as follows: firstly locking a mould, then throwing sizing material into a double-cone machine barrel from a feeding hopper, starting a driving motor, driving a long-cone screw and a short-cone screw to rotate together by the driving motor through a front coupler, a speed reducer, a rear coupler and a gear box, conveying the sizing material into the screw machine barrel from the double-cone machine barrel in a positive displacement way by the cooperation of the long-cone screw and the short-cone screw, shearing and extruding the long-cone screw to generate pressure on the sizing material, filtering the sizing material from the screw machine barrel under the action of the pressure through a filter screen of a screen changing machine body, filtering part of impurities in the sizing material by the filter screen,

During filtration, impurities with larger size than the pore diameter of the filter screen are filtered out, the filter screen is easy to be blocked due to the larger number of impurities with larger size in the sizing material which is not subjected to primary filtration, and when the filter screen is blocked along with the accumulation of the impurities, the filter screen is cleaned and replaced under the condition of not stopping,

Cooling water is connected into the cooling water channel to take away heat generated when the sizing material is filtered; the sizing material through the filter screen gets into in the gear pump body, left motor and right motor start, left motor and right motor drive respectively at last gear shaft and gear shaft under with the same speed rotation, so that the gear of last gear shaft and gear shaft gear under only take place the meshing and do not take place the mutual contact, do not produce interact effort, there is not mutual friction, reduce the wearing and tearing of gear, tooth resultant force between the gear has been reduced, the life of the gear pump body is prolonged through improving the life of gear, the gear shaft carries out plasticization extrusion shearing and booster conveying to the sizing material, insert the heat that the cooling water was sheared and produced in the condenser tube and take away the sizing material. The sizing material passing through the gear pump enters a nozzle and is injected into a die through the nozzle;

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a gear pump formula rubber continuous injection device, includes Y type extruder (1), guide rail (2) and mould (3), its characterized in that: the discharging end of the Y-shaped extruder (1) is connected with a screen changing filter device (4), the screen changing filter device (4) is connected with a gear pump (5), and the gear pump (5) is connected with a die (3) through a nozzle (6);

The Y-shaped extruder (1) is arranged on the guide rail (2) through a first mounting seat (7), and the screen changing filter device (4) and the gear pump (5) are arranged on the guide rail (2) through a second mounting seat (8);

The screen replacing and filtering device (4) comprises a screen replacing machine body (401) and a rotating motor (402) arranged at the bottom of the screen replacing machine body (401), a plurality of cooling water channels (403) are annularly arranged in the inner wall of the screen replacing machine body (401), a positioning cavity (404) is arranged on the side wall of the screen replacing machine body (401), a screen replacing fan seat (405) is connected to an output shaft of the rotating motor (402) in a key manner, two cone filter screen bodies (406) are arranged on the screen replacing fan seat (405), a sealing ring (407) is arranged at one end of the joint of the cone filter screen bodies (406) and a screw machine barrel (106), and a telescopic sleeve (11) is arranged at the joint of the screw machine barrel (106) and the screen replacing machine body (401);

a shaft driving seat (408) is arranged in the positioning cavity (404), an annular spray head (409) is arranged on the shaft driving seat (408), the annular spray head (409) is connected with a cooling water channel (403) through a pipeline, and a discharge port (410) is arranged at the bottom of the positioning cavity (404);

The telescopic sleeve (11) comprises a conical ring, the conical ring is arranged on the screw machine barrel through a spring, and the inner diameter of the conical ring is consistent with the inner diameter of the screw machine barrel (106);

The Y-shaped extruder (1) comprises a driving motor (101), the driving motor (101) is connected with a speed reducer (102) through a front coupling, the speed reducer (102) is connected with a gear box (103) through a rear coupling, the gear box (103) is connected with a double-cone machine barrel (104), a feeding hopper (105) is arranged on the double-cone machine barrel (104), the feeding hopper (105) is connected with a screw machine barrel (106) through a machine barrel mounting seat, and a long-cone screw (115) and a short-cone screw (116) are arranged in the double-cone machine barrel (104);

The novel extruder is characterized in that a counter extrusion cavity (107), a taper pipe gradually-collected cavity (108) and a column feeding cavity (109) are sequentially formed in the screw machine barrel (106), two extrusion screws (110) which are meshed with each other are arranged in the counter extrusion cavity (107), a plurality of cross flow plates (111) are arranged in the column feeding cavity (109) at equal intervals, guide rotary blades (112) are spirally arranged on the inner wall of the column feeding cavity (109), a first circulating pipe (113) and a second circulating pipe (114) are arranged in the guide rotary blades (112), the first circulating pipe (113) is connected with a cooling water channel (403) through a pipeline, and the second circulating pipe (114) extends to the outer wall of the screw machine barrel (106).

2. The gear pump type continuous rubber injection device according to claim 1, wherein: the gear pump (5) comprises a pump body (501), a gear shaft (502), a left coupler (503), a right coupler (504), a left motor (505), a right motor (506), a hopper (507) and a cooling water pipe, wherein two gear shafts (502) are arranged in the pump body (501), the gear shaft (502) positioned at the inner top of the pump body (501) is connected with the left motor (505) through the left coupler (503), the gear shaft (502) positioned at the inner bottom of the pump body (501) is connected with the right motor (506) through the right coupler (504), the hopper (507) is arranged at the joint of the gear shaft (502) and the left coupler (503) and the right coupler (504), and the cooling water pipe is positioned in the inner wall of the pump body (501) corresponding to the position of the gear shaft (502).

3. The gear pump type continuous rubber injection device according to claim 1, wherein: the two extrusion screws (110) are in staggered combination of a dense screw pitch section and a loose screw pitch section, the spiral meshing mode of the two extrusion screws is that the dense screw pitch section meshes with the loose screw pitch section, the screw pitch of the dense screw pitch section is 1/3 of the screw pitch of the loose screw pitch section, and one ends of the two extrusion screws are respectively connected to the long cone screw (115) and the short cone screw (116).

4. The gear pump type continuous rubber injection device according to claim 1, wherein: the guide rail (2) comprises a base (201) with a groove and a sliding rail (202), the first installation seat (7) and the second installation seat (8) are fixedly installed on the sliding rail (202), a fixed guide rail (10) is arranged at the bottom of the die (3), and the fixed guide rail (10) is connected to the sliding rail through a hydraulic rod (9).