CN214425220U

CN214425220U - Hot runner loop returning device of double-plate double-station screen changer

Info

Publication number: CN214425220U
Application number: CN202120579502.XU
Authority: CN
Inventors: 王志广; 于子立; 汪东星; 郭玲梅
Original assignee: Henan Xinyi Automation Equipment Co Ltd
Current assignee: Henan Xinyi Automation Equipment Co Ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-10-19
Anticipated expiration: 2031-03-22

Abstract

The utility model relates to the technical field of plastic production equipment, and discloses a hot runner loop returning device of a double-plate double-station screen changer, which comprises a screen filter, wherein two feed inlets of the screen filter are provided with hot channel return assemblies, each hot channel return assembly comprises a reversing valve block, a communicated reversing shaft hole is arranged in the valve body of the reversing valve block, a reversing shaft is arranged in the reversing shaft hole, one end of the reversing shaft is fixedly connected with a cylinder column of a cylinder, the cylinder is arranged in a cylinder mounting seat, two ends of the cylinder are provided with 2 pillars with the same specification, the front side surface of the valve body of the reversing valve block is provided with a blind hole, the blind hole is communicated with the reversing shaft hole, the outer side of the blind hole is provided with an inlet flange, the inlet flange is fixedly connected with the reversing valve block through bolts, the square through holes are arranged in the reversing valve block and the reversing shaft, materials can conveniently enter the screen filter, the reversing shaft is moved to adjust material circulation channels, the direction through-hole is at material migration in-process, and feed inlet internal pressure and flow are invariable, and it can not influence product production efficiency and quality to change the silk screen.

Description

Hot runner loop returning device of double-plate double-station screen changer

Technical Field

The utility model relates to a plastics production facility technical field specifically is a double plate duplex position trades wire stitcher hot runner return ring device.

Background

At present, filters are often used in plastic production equipment, the filters can filter impurities in molten plastic and improve the quality of plastic production, common filters on the market are divided into screen filters and non-screen filters, wherein the screen filters are high in filtering precision and high in product quality and are commonly used for producing plastic with high quality requirements, but screen filters need to be replaced when working for a long time, and production efficiency is reduced when the screen filters are frequently replaced, so that the double-screen filters are developed and used for solving the problem, two feeding ports of the double-screen filters are arranged, a material is controlled to enter a channel of the filters through movement of a valve block in a hot runner loop back device, when the screen is required to be replaced, the hot runner loop device introduces the material into another feeding port to realize the work of replacing the screen, the production efficiency cannot be influenced, and the valve block inlet of the common hot runner loop back device on the market is a round hole, the axle import is two inclined holes, and the valve block import that the matching corresponds and the axle import inclined hole come to correspond the feed inlet of silk screen filter and realize, but can break off at switching-over in-process material flow, and the material is not from a runner gently switch over to another runner, and the cavity exhaust gas need be filled in the switching process, then the material just can normally flow out the export, can lead to disconnected strip like this, and the production process can be interrupted.

The utility model aims at providing a hot runner looper device of a double-plate double-station screen changer, which solves the defects of the prior art.

In order to achieve the above object, the utility model provides a following technical scheme: a hot runner loop returning device of a double-plate double-station screen changer comprises a screen filter, wherein the screen filter is a double-channel filter, two feed inlets of the filter are provided with hot channel backflow assemblies, each hot channel backflow assembly comprises a reversing valve block, the reversing valve blocks are fixedly connected with the screen filter through bolts, a through reversing shaft hole is formed in each reversing valve block, a reversing shaft is arranged in each reversing shaft hole, each reversing shaft is embedded in each reversing shaft hole, one end of each reversing shaft is fixedly connected with an oil cylinder column, an oil cylinder is arranged in an oil cylinder mounting seat, two ends of each oil cylinder are provided with 2 pillars with the same specification, two ends of each pillar are provided with threads, one end of each pillar is fixedly connected with a reversing valve block body, and the other end of each pillar is fixedly connected with the oil cylinder mounting seat; the front side surface of the reversing valve block valve body is provided with a blind hole which is communicated with the reversing shaft hole, the outer side of the blind hole is provided with an inlet flange, and the inlet flange is fixedly connected with the reversing valve block through a bolt.

Furthermore, a front square through hole a and a rear square through hole a are formed in the reversing valve block body, and a square through hole b penetrating through the reversing shaft is formed in the reversing shaft.

The square through holes are formed in the reversing valve block and the reversing shaft, so that materials can conveniently flow through the reversing valve block and the reversing shaft to enter a feeding hole of the screen filter, the reversing shaft only opens a small square overlapped feeding hole of the other flow passage at the initial switching stage, the work is not influenced, the process is used for filling the cavity to remove air, the reversing shaft moves smoothly until the other flow passage is switched completely, the sum of the ☐ areas of the two flow passages is constant, and the flow and the pressure in the material hole are kept stable; when switched, the network can be switched without affecting the channel that is operating.

Furthermore, a sealing gasket is arranged at the contact position of the inlet flange and the reversing valve block valve body.

Set up sealed the pad, prevent on the one hand that import flange and switching-over valve piece high temperature deformation from causing import flange and switching-over valve piece wearing and tearing, on the other hand prevents that the material from overflowing through the gap between import flange and the switching-over valve piece, makes things convenient for the maintenance work in later stage.

Furthermore, a limiting piece is installed in the cylinder column of the oil cylinder, semicircular grooves are formed in two sides of the limiting piece, and the limiting piece is clamped in the column body of the support column through the grooves.

The limiting piece is arranged to standardize the moving path of the oil cylinder and prevent the abrasion of the reversing shaft and the reversing valve block caused by the movement angle deviation of the reversing shaft.

Furthermore, heating holes are formed in the reversing valve block and the inlet flange, and heaters are installed in the heating holes.

The heater is installed, so that the problem that the material circulation is not smooth due to the fact that the material is solidified caused by heat dissipation of the material in the moving process is avoided, and the product quality is prevented from being influenced.

The utility model has the advantages that: the square through holes are formed in the reversing valve block and the reversing shaft, so that materials can conveniently flow through the reversing valve block and the reversing shaft to enter a feeding hole of the screen filter, the reversing shaft only opens a small square overlapped feeding hole of the other flow passage at the initial switching stage, the work is not influenced, the process is used for filling a cavity to remove air, the reversing shaft moves smoothly until the other flow passage is switched completely, the sum of the opened ☐ areas of the two flow passages is constant, and the flow and the pressure of the feeding hole are kept stable; when switched, the network can be switched without affecting the channel that is operating.

The parts of the device not involved are the same as or can be implemented using prior art.

Brief description of the drawingsthe other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

Fig. 1 is a schematic view of the whole structure of the hot runner loop device of the double-plate double-station screen changer of the present invention.

The reference numbers in the figures illustrate: 1. a wire mesh filter; 11. a feed inlet; 2. a hot channel return assembly; 201. an inlet flange; 202. a diverter valve block; 203. a reversing shaft hole; 204. a reversing shaft; 205. a square through hole b; 206. a pillar; 207. an oil cylinder mounting base; 208. an oil cylinder; 209. a limiting sheet; 210. a square through hole a.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Please refer to fig. 1: a hot runner loop returning device of a double-plate double-station screen changer comprises a screen filter 1, wherein the screen filter 1 is a double-channel filter, two feed inlets 11 of the filter 1 are provided with hot channel backflow assemblies 2, each hot channel backflow assembly 2 comprises a reversing valve block 202, each reversing valve block 202 is fixedly connected with the screen filter 1 through bolts, a reversing shaft hole 203 which is through is formed in a valve body of each reversing valve block 202, a reversing shaft 204 is arranged in each reversing shaft hole 203, the reversing shaft 204 is embedded in each reversing shaft hole 203, one end of each reversing shaft 204 is fixedly connected with a cylinder column 208, each oil cylinder 208 is arranged in an oil cylinder mounting seat 207, two ends of each oil cylinder 208 are provided with 2 pillars 206 with the same specification, two ends of each pillar 206 are provided with threads, one end of each pillar 206 is fixedly connected with the valve body of the corresponding reversing valve block 202, and the other end of each oil cylinder mounting seat 207 is fixedly connected with one end of the corresponding pillar 206; the front side surface of the valve body of the reversing valve block 202 is provided with a blind hole which is communicated with a reversing shaft hole 203, the outer side of the blind hole is provided with an inlet flange 201, and the inlet flange 201 is fixedly connected with the reversing valve block 202 through bolts.

A front-back through square through hole a210 is formed in the valve body of the reversing valve block 202, and a square through hole b205 penetrating through the reversing shaft 204 is formed in the reversing shaft 204.

The square through holes are formed in the reversing valve block 202 and the reversing shaft 204, so that materials can conveniently flow through the reversing valve block 202 and the reversing shaft 204 to enter the feeding hole 11 of the screen filter 1, the reversing shaft 204 only opens one small square overlapped feeding hole 11 of the other flow channel at the initial switching stage, the work is not influenced, the process is used for filling a cavity to remove air, the reversing shaft 204 moves slowly until the other flow channel is completely switched, in the process, the sum of the ☐ areas of the two flow channels is constant, and the flow and the pressure in the feeding hole 11 are kept stable; when switched, the network can be switched without affecting the channel that is operating.

And a sealing gasket is arranged at the contact position of the inlet flange 201 and the reversing valve block 202.

Set up sealed the pad, prevent on the one hand that import flange 201 and switching-over valve piece 202 high temperature deformation from causing import flange 201 and switching-over valve piece 202 wearing and tearing, on the other hand prevents that the material from overflowing through the gap between import flange 201 and the switching-over valve piece 202, makes things convenient for the maintenance work in later stage.

A limiting sheet 209 is installed in the cylinder column of the oil cylinder 208, semicircular grooves are formed in two sides of the limiting sheet 209, and the limiting sheet 209 is clamped in the column body of the support column 206 through the grooves.

The limiting piece 209 is arranged to regulate the moving path of the oil cylinder 208, so that the abrasion of the reversing shaft 204 and the reversing valve block 202 caused by the movement angle deviation of the reversing shaft 204 is prevented.

Heating holes are formed in the reversing valve block 202 and the inlet flange 201, and heaters are installed in the heating holes.

The utility model discloses a theory of operation: use the utility model discloses, the material is in importing flange 201 and getting into switching-over valve block 202, switching-over axle 204 sets up at initial position this moment, direction through-hole b in the switching-over axle 204 is just to one of them feed inlet 11 of silk screen filter 1, when the silk screen in this feed inlet 11 needs to be changed, promote switching-over axle 204 through hydro-cylinder 208 in switching-over shaft hole 203, the square through-hole that treats switching-over axle 204 is just to another feed inlet 11, hydro-cylinder 208 stop motion, the material gets into another filtration passageway of silk screen filter 1 this moment, do not influence the work efficiency of silk screen filter 1, conveniently change the silk screen simultaneously.

Having shown and described the basic principles and principal features of the invention and advantages thereof, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of 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, and any reference signs in the claims are not intended to be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a double plate duplex position trades net ware hot runner and returns ring device which characterized in that: including wire mesh filter (1), wire mesh filter (1) is the binary channels filter, and two feed inlets (11) of filter (1) play and are provided with hot passageway backward flow subassembly (2), hot passageway backward flow subassembly (2) are including switching-over valve piece (202), switching-over valve piece (202) are through bolt and wire mesh filter (1) fixed connection, set up switching-over shaft hole (203) that link up in switching-over valve piece (202) valve body, are provided with reversing shaft (204) in switching-over shaft hole (203), and reversing shaft (204) are inlayed in switching-over shaft hole (203), and switching-over shaft (204) one end and hydro-cylinder (208) jar post fixed connection, and install in hydro-cylinder mount pad (207) hydro-cylinder (208), and hydro-cylinder (208) both ends are provided with pillar (206) of specification such as 2, and set up the screw thread at pillar (206) both ends, pillar (206) one end and switching-over valve piece (202) valve body fixed connection, the other end is fixedly connected with an oil cylinder mounting seat (207); the front side surface of the valve body of the reversing valve block (202) is provided with a blind hole, the blind hole is communicated with a reversing shaft hole (203), an inlet flange (201) is arranged on the outer side of the blind hole, and the inlet flange (201) is fixedly connected with the reversing valve block (202) through a bolt.

2. The double-plate double-station net changer hot runner return ring device according to claim 1, characterized in that: a front-back through square through hole a (210) is formed in the valve body of the reversing valve block (202), and a square through hole b (205) penetrating through the reversing shaft (204) is formed in the reversing shaft (204).

3. The double-plate double-station net changer hot runner return ring device according to claim 1, characterized in that: and a sealing gasket is arranged at the contact position of the inlet flange (201) and the valve body of the reversing valve block (202).

4. The double-plate double-station net changer hot runner return ring device according to claim 1, characterized in that: a limiting piece (209) is installed in the cylinder column of the oil cylinder (208), semicircular grooves are formed in two sides of the limiting piece (209), and the limiting piece (209) is clamped in the cylinder body of the support column (206) through the grooves.

5. The double-plate double-station net changer hot runner return ring device according to claim 1, characterized in that: heating holes are formed in the reversing valve block (202) and the inlet flange (201), and heaters are installed in the heating holes.