CN115107247B

CN115107247B - External cleaning reflux device of injection molding feeding equipment and control method

Info

Publication number: CN115107247B
Application number: CN202210723844.3A
Authority: CN
Inventors: 谢彪; 庞美兴
Original assignee: Huizhou Hetai Intelligent Technology Co ltd
Current assignee: Huizhou Hetai Intelligent Technology Co ltd
Priority date: 2022-06-24
Filing date: 2022-06-24
Publication date: 2024-01-30
Anticipated expiration: 2042-06-24
Also published as: CN115107247A

Abstract

The invention discloses an external cleaning reflux device of injection molding feeding equipment and a control method, comprising the following steps: the electric appliance support is used for installing electronic equipment, the first driving assembly is installed on the electric appliance support, the second driving assembly is installed on the first driving assembly, the collecting cylinder is installed on the second driving assembly, the piston assembly is installed in the collecting cylinder, the movable part is installed in the collecting cylinder, the adjusting rod is installed in the movable part, the movable rod is installed on the adjusting rod, and other components, the movable part is started through the pressure difference between the inside and the outside, then the collecting cylinder is connected with the feeding cylinder for pressure relief, the adjusting rod and the movable rod are matched through the piston assembly for liquid discharge, and a corresponding control method is achieved, the pressure relief is carried out on the feeding cylinder when unstable pressure is generated on the feeding cylinder, liquid raw materials stored in the pressure relief are fed back into the feeding cylinder at corresponding time, and the collecting chamber can be conveniently cleaned through external cleaning equipment.

Description

External cleaning reflux device of injection molding feeding equipment and control method

Technical Field

The invention relates to the field of injection molding technical equipment, in particular to an external cleaning reflux device of injection molding feeding equipment and a control method.

Background

When the existing plastic products are produced in batches, raw material particles are generally melted through an injection molding machine and injected into a mold for cooling molding, and the plastic products have the advantages of high integration degree and various shapes.

The existing injection molding feeding equipment generally comprises a telescopic feeding rod with a spiral outer ring, the feeding rod is driven by a motor to rotate, the telescopic feeding rod is driven by a hydraulic rod or the motor to stretch, and the front end of the feeding rod is a conical pushing piece. The feeding pressure and feeding speed are different for different dies, so that the equipment needs to be adjusted in advance when the dies are replaced.

In order to avoid overlarge and unstable feeding pressure, the existing feeding equipment is generally provided with a pressure relief valve, a corresponding temporary storage pipeline and a return pipeline, and the existing return pipeline generally pumps out liquid raw materials in the return pipeline through suction formed during return of a feeding rod, but the return mode is excessively dependent on the return of the feeding rod, if the return speed is too low and the return stroke is too short, insufficient return can be caused, and a heat preservation and heating device is not arranged in the return pipeline generally, so that blockage can be caused. The raw materials in the return pipeline are sent back through the pump too much trouble, and the corresponding oil way of the hydraulic rod for driving the forward movement is adjusted.

And, a return line for temporarily storing the return raw material liquid, which needs to be replaced or cleaned under long-term use or raw material liquid formulation change, so as to avoid the influence of the residual raw material liquid on the injection molding quality, such as: the color of the raw material liquid is different in the front and the back, and the residual raw material liquid is mixed with the new liquid, so that the color deviation occurs. The return line/temporary storage cavity requires a convenient cleaning or replacement structure.

Therefore, there is a need for an external cleaning reflow apparatus and control method for an injection molding feeding apparatus that solves one or more of the above problems.

Disclosure of Invention

The invention provides an external cleaning reflux device of injection feeding equipment and a control method thereof, which are used for solving one or more problems in the prior art. The invention adopts the technical proposal for solving the problems that: an external cleaning reflux device of an injection molding feeding device, comprising: the electric appliance support is used for installing electronic equipment;

the first driving component is fixedly arranged on the electric appliance support, the power source of the first driving component is any one or more of a motor, an electromagnetic valve and a hydraulic component, and the first driving component is used for locking a component and driving the component to slide up and down;

the second driving assembly is fixedly arranged on the first driving assembly, a connecting ring is fixedly connected to the outer side of the second driving assembly, the power source of the second driving assembly is any one or more of an electromagnet, a motor and a hydraulic assembly, and the second driving assembly is used for locking a component or driving the component to slide up and down;

the support piece is arranged in the second driving assembly, a mounting groove is formed in the support piece, and a spring is arranged in the mounting groove;

the collecting cylinder is provided with a liquid inlet hole on the upper end surface, a collecting chamber is arranged on the collecting cylinder, an opening of the collecting chamber faces downwards and is connected with the liquid inlet hole, the collecting cylinder is fixedly connected with the second driving assembly and the connecting ring, and the opening of the collecting chamber is sealed by the connecting ring;

the collecting device comprises a collecting cylinder, and is characterized in that a connecting table is arranged on the outer side face of the collecting cylinder, a connecting hole communicated with the collecting cavity is formed in the connecting table, a sealing piece is arranged in the connecting hole, a blocking piece or a conveying piece is arranged in the connecting hole, the conveying piece is provided with a conveying hole, the blocking piece is matched with the sealing piece to seal the connecting hole, and the conveying piece is used for being connected with the outside;

the piston assembly is arranged in the collecting cavity, the periphery of the piston assembly is tightly connected with the inner wall of the collecting cavity, the second driving assembly drives the piston assembly to reciprocate, and the upper end face of the piston assembly is provided with a matching groove;

the movable part is internally provided with a through hole penetrating through the upper end and the lower end of the movable part, the upper end of the movable part is a connecting part, the shape of the connecting part is matched with the liquid inlet, the lower side of the connecting part is provided with a sealing display plate extending outwards, the shape of the sealing display plate is matched with the matched groove, the connecting part is provided with a communicating pipeline, the upper end pipe orifice of the communicating pipeline is connected with the through hole, the lower end pipe orifice of the communicating pipeline is connected with the lower side surface of the sealing display plate or is arranged on the lower side of the sealing display plate, the movable part is arranged in the collecting cavity, the piston assembly is sleeved on the movable part, the piston assembly is tightly connected with the movable part, and the lower end of the movable part is abutted with the spring;

the adjusting rod is provided with a heating part, the position of the heating part corresponds to the position of the collecting cavity, the adjusting rod is installed in the through hole, the adjusting rod passes through the supporting piece and is connected with the first driving component and the electric appliance support, and the first driving component locks or drives the adjusting rod to slide up and down;

the movable rod is fixedly arranged at the upper end part of the adjusting rod, a ball head is arranged at the upper end of the movable rod and used for sealing an upper end opening of the through hole, the ball head can extend out of the liquid inlet hole, the diameter of a rod body of the movable rod is smaller than that of the through hole, and a flowing gap is arranged between the rod body of the movable rod and the through hole;

the first driving assembly, the second driving assembly and electronic equipment in the electric appliance support are electrically connected with an external controller.

Further, a first step and a second step are sequentially arranged in the connecting hole, the sealing element is installed on the first step, the plugging element or the conveying element is installed on the second step, the plugging element is tightly connected with the sealing element, and the conveying element is tightly connected with the sealing element.

Further, a detection hole is formed in the plugging piece, and an inner end orifice of the detection hole is connected with the sealing piece.

Further, the sealing element is annular, the end face of the sealing element facing the inner side is a matching end face, and the radian of the matching end face is consistent with that of the side wall of the collecting chamber.

Further, the method further comprises the following steps: the isolating ring is sleeved at the lower end of the movable rod and is tightly connected with the side wall of the through hole.

Further, the power source of the second driving assembly is an electromagnet, the lower end of the piston assembly is fixedly provided with a permanent magnet, and the permanent magnet is an alnico magnet.

Further, the power source of the second driving assembly is a motor or a hydraulic assembly, a driving rod is installed on the second driving assembly, the upper end of the driving rod is fixedly connected with the piston assembly, the lower end of the driving rod is contained in the first driving assembly or in the first driving assembly and the electric appliance support, and the motor or the hydraulic assembly drives the driving rod to slide up and down.

Further, the outer side surface of the connecting part is an arc surface or an inclined surface, and a first matching surface matched with the outer side surface of the connecting part is arranged on the liquid inlet hole; the upper end opening of the through hole is provided with a second matching surface matched with the outer surface of the ball head.

Further, the edge of the matching groove is provided with an inclined surface or an arc surface inclined towards the outer side. And a control method of an external cleaning reflux device of injection molding feeding equipment, comprising the following steps:

s010, a controller of the device monitors whether the injection molding feeding rod carries out forward feeding or backward resetting;

s011, when the material is injected forward, the first driving component drives the adjusting rod to move downwards for locking, and the second driving component drives the piston component to move downwards for locking;

s012, when the backward reset is performed, the first driving component drives the adjusting rod to move upwards, then the second driving component drives the piston component to perform forward and backward reciprocating motions for a plurality of times, when the backward reset is completed or after a preset time period, the first driving component drives the adjusting rod to move downwards for locking, and the second driving component drives the piston component to move downwards for locking;

s020, heating the collecting chamber to 250-320 ℃ by the heating part of the adjusting rod when injection molding is performed;

s030, collecting chamber pressure adjustment, wherein the first driving assembly drives the adjusting rod to move downwards for locking, and the second driving assembly drives the piston assembly to move forwards for a preset distance and locks the piston assembly after the piston assembly is completed;

s040, cleaning a collecting chamber, namely taking down a plugging piece when the collecting chamber needs to be cleaned, observing whether a sealing piece installed in a connecting hole has a problem or not, and replacing if the problem occurs, otherwise, installing a conveying piece in the connecting hole, then connecting and cleaning the collecting chamber through the conveying piece and external cleaning equipment, discharging the conveying piece after the cleaning is completed, and resetting the plugging piece.

The beneficial value obtained by the invention is as follows: according to the invention, the electric appliance support, the first driving assembly, the second driving assembly, the supporting piece, the collecting barrel, the piston assembly and other components are connected together through a smart structure, the plugging piece and the conveying piece are arranged on the collecting barrel, and the corresponding adjusting and controlling method is matched, so that when injection molding feeding is realized, the excessive/unstable internal pressure of the feeding barrel is realized, the movable pieces of the pressure relief reflux devices are opened under the pressure difference, the liquid raw materials enter the collecting chamber to reduce the internal pressure of the feeding barrel, the time for adjusting the hydraulic loop of the feeding rod by a worker is further increased, and the fault tolerance redundancy is improved;

after injection molding feeding is finished, when the feeding rod moves backwards and resets, the second driving component drives the movable rod to move forwards to open the through hole, the first driving component drives the piston component to do reciprocating motion, and then the inner pressure of the feeding cylinder is reduced by matching with the backward movement of the feeding rod, so that liquid raw materials collected in the collecting cavity are sprayed into the feeding cylinder, and in the process, the liquid raw materials are insulated through a heating part on the adjusting rod to avoid condensation and blockage; the distance between the piston assembly and the movable part is adjusted, so that the movable part is more difficult to open under the action of the larger internal pressure and the spring, the equipment can adapt to larger feeding cylinder pressure, the feeding cylinder pressure cannot be opened in advance, the stability is ensured, and the application scale is improved;

through the plugging piece and the sealing piece, the collecting chamber is prevented from leakage during working, meanwhile, the gap between the piston assembly and the connecting hole can be reduced through the matched end surface on the plugging piece, the tight connection between the piston assembly and the collecting chamber is ensured, and further the abrasion and the inner side leakage risk generated when the piston assembly passes through the connecting hole are reduced; the transfer member may be a one-way valve or a connecting one-way valve, through which it can be conveniently connected to an external high-pressure liquid/gas-delivery cleaning device for cleaning the collection chamber. The practical value of the invention is greatly improved.

Drawings

FIG. 1 is a schematic illustration of the present invention;

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

FIG. 3 is a cross-sectional view I of the present invention in an operative state;

fig. 4 is an enlarged partial view of a sectional view I of the present invention;

fig. 5 is a sectional view I of the cleaning state of the present invention;

FIG. 6 is a cross-sectional view II of the present invention;

FIG. 7 is a cross-sectional view of the piston assembly of the present invention as driven by a drive rod;

FIG. 8 is a partial enlarged view of state I of the present invention;

FIG. 9 is an enlarged view of a portion of state II of the present invention;

FIG. 10 is an enlarged view of a portion of state III of the present invention;

fig. 11 is a partial enlarged view of state IV of the present invention;

fig. 12 is a schematic view of the installation of the present invention.

[ reference numerals ]

10 & lt & gt, 20 & gt, injection pipeline 30 & gt, feeding rod 40 & gt, feeding cylinder

101 electric appliance support 201 first driving component 301 second driving component 302 driving rod

310 & lt- & gt connecting ring 401 & lt- & gt support 402 & lt- & gt mounting groove 410 & lt- & gt spring 501 & lt- & gt collecting cylinder

502 liquid inlet 503 first mating surface 510 collection chamber 520 connection table

521 connecting hole 522 first step 523 second step 530 seal

540 sealing member 541 detecting hole 542 matching end surface 550 transporting member 551 transporting hole

601 & lt & gt piston assembly 602 & lt & gt mating groove 610 & lt & gt permanent magnet 701 & lt & gt moving part

702 communication line 703 through hole 704 second mating face 710 sealing panel

720 connecting part 801 adjusting rod 810 isolating ring 901 movable rod

910.ball head 920.flow gap.

Detailed Description

In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention briefly described above will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein without departing from the spirit or scope of the invention as defined in the following claims.

As shown in fig. 1 to 12, the present invention discloses an external cleaning reflux device of an injection feeding device, which comprises: an electrical appliance support 101, wherein the electrical appliance support 101 is used for installing electronic equipment and is fixedly connected with an external bracket/cylinder;

the first driving assembly 201 is fixedly installed on the electrical appliance support 101, a power source of the first driving assembly 201 is any one or more of a motor, an electromagnetic valve and a hydraulic assembly, and the first driving assembly 201 is used for locking a component and driving the component to slide up and down;

the second driving assembly 301 is fixedly installed on the first driving assembly 201, a connecting ring 310 is fixedly connected to the outer side of the second driving assembly 301, a power source of the second driving assembly 301 is any one or more of an electromagnet, a motor and a hydraulic assembly, and the second driving assembly 301 is used for locking a component or driving the component to slide up and down;

a support member 401, wherein the support member 401 is installed in the second driving assembly 301, a mounting groove 402 is provided on the support member 401, and a spring 410 is provided in the mounting groove 402;

the collecting cylinder 501, the upper end surface of the collecting cylinder 501 is provided with a liquid inlet 502, the collecting cylinder 501 is provided with a collecting chamber 510, the opening of the collecting chamber 510 faces downwards and is connected with the liquid inlet 502, the collecting cylinder 501 is fixedly connected with the second driving assembly 301 and the connecting ring 310, and the connecting ring 310 seals the opening of the collecting chamber 501;

a connection table 520 is arranged on the outer side surface of the collecting cylinder 501, a connection hole 521 communicated with the collecting chamber 510 is arranged on the connection table 520, a sealing member 530 is arranged in the connection hole 521, a blocking member 540 or a conveying member 550 is arranged in the connection hole 521, the conveying member 550 is provided with a conveying hole 551, the blocking member 540 is matched with the sealing member 530 to seal the connection hole 521, and the conveying member 550 is used for being connected with the outside;

the piston assembly 601 is installed in the collecting chamber 510, the periphery of the piston assembly 601 is tightly connected with the inner wall of the collecting chamber 510, the second driving assembly 301 drives the piston assembly 601 to reciprocate, and a matching groove 602 is formed in the upper end face of the piston assembly 601;

the movable part 701, a through hole 703 penetrating through the upper end and the lower end of the movable part 701 is arranged in the movable part 701, the upper end of the movable part 701 is a connecting part 720, the shape of the connecting part 720 is matched with that of the liquid inlet 502, a sealing panel 710 extending outwards is arranged on the lower side of the connecting part 720, the shape of the sealing panel 710 is matched with that of the matched groove 602, the connecting part 720 is provided with a communication pipeline 702, an upper end pipe orifice of the communication pipeline 702 is connected with the through hole 703, a lower end pipe orifice of the communication pipeline 702 is connected with the lower side surface of the sealing panel 710 or is arranged on the lower side of the sealing panel 710, the movable part 701 is arranged in the collecting chamber 510, the piston assembly 601 is sleeved on the movable part 701, the piston assembly 601 is tightly connected with the movable part 701, and the lower end of the movable part 701 is abutted against the spring 410;

the adjusting rod 801 is provided with a heating part, the position of the heating part corresponds to the position of the collecting chamber 510, the adjusting rod 801 is installed in the through hole 703, the adjusting rod 801 passes through the supporting piece 401 to be connected with the first driving assembly 201 and the electric appliance support 101, and the first driving assembly 201 locks or drives the adjusting rod 801 to slide up and down;

the movable rod 901 is fixedly arranged at the upper end part of the adjusting rod 801, a ball head 910 is arranged at the upper end of the movable rod 901, the ball head 910 is used for sealing an upper end opening of the through hole 703, the ball head 910 can extend out of the liquid inlet 502, the rod body diameter of the movable rod 901 is smaller than the diameter of the through hole 703, and a flow gap 920 is arranged between the rod body of the movable rod 901 and the through hole 703;

the first driving assembly 201, the second driving assembly 301, and the electronic devices in the electrical appliance support 101 are electrically connected to an external controller, which is typically a PLC.

It should be noted that, the mechanical transmission structures in the first driving assembly 201 and the second driving assembly 301 may be a push-pull structure and a gear structure, and the locking member may be a clamping connection or electromagnetic adsorption.

In the working state, the connecting hole 521 is provided with the blocking member 540, and when cleaning is needed, the blocking member 540 is replaced by the conveying member 550, and the conveying member 550 may be a one-way valve or connected with an external one-way valve. At least two of the connecting stages 520 and the connecting holes 521 are provided and are generally symmetrically disposed, and when the conveying member 550 is a check valve, one is out and the other is in. The external cleaning device is used for conveying the cleaning liquid/gas to the collecting chamber 510 through the conveying member 550 by a pipeline, so as to clean the collecting chamber 510, and the cleaning device is composed of a common high-pressure or low-pressure pump, a pipeline and a water tank/gas cylinder.

Specifically, as shown in fig. 3 and 4, a first step 522 and a second step 523 are sequentially disposed in the connection hole 521, the first step 522 is disposed on the inner side, the second step 523 is disposed on the outer side, the sealing member 530 is mounted on the first step 522, and the sealing member 540 or the conveying member 550 is mounted on the second step 523, so that the sealing member 530 mounted on the first step 522 is not pressed by a member mounted on the second step 523; the blocking member 540 is tightly coupled to the sealing member 530, and the transporting member 550 is tightly coupled to the sealing member 530. Further, the sealing member 540 is provided with a detection hole 541, and an inner end opening of the detection hole 541 is connected to the sealing member 530, so as to determine the sealing state between the sealing member 530 and the sealing member 540 or the conveying member 550 by observing or using a cotton swab inserted. And, the sealing member 530 is annular, the end surface of the sealing member 540 facing the inner side is a mating end surface 541, and the radian of the mating end surface 541 is consistent with the radian of the side wall of the collecting chamber 510, so that when the piston assembly 601 passes through the connecting hole 521, the sealing member can be tightly contacted with the mating end surface 542, so as to reduce the risk of leakage at the rear end, and meanwhile, avoid forming a groove or a boss between the mating end surface 542 and the inner side orifice of the connecting hole 521, thereby affecting the movement of the piston assembly 601.

It should be noted that, in order to ensure that, after the plugging member 540 is installed, the mating end face 542 can be very closely attached to the inner side wall of the collecting chamber 510 to form an approximately integrated cambered surface, a rotationally aligned mark (not shown in the drawing) is disposed on the connecting table 520 and the plugging member 540, and under the cooperation of the mark, the installation depth and the rotation angle of the plugging member 540 can be adjusted, so as to achieve a good attaching effect.

Specifically, as shown in fig. 8, the method further includes: and the isolating ring 810 is sleeved at the lower end of the movable rod 901, and the isolating ring 810 is tightly connected with the side wall of the through hole 703. The isolating ring 810 is used for isolating the liquid material from the adjusting rod 801, so as to prevent the liquid material from penetrating between the adjusting rod 801 and the wall of the through hole 703, and if the adjusting rod 801 is tightly connected with the through hole 703, the isolating ring 810 may not be provided; the spacer 810 may be further used to block the upper end orifice of the communication pipeline 702, where the specific application scenario is that the adjusting rod 801 extends outwards to enable the spacer 810 to block the upper end orifice of the communication pipeline 702, then the piston assembly 601 moves forwards to pressurize the collecting chamber 510, and then little liquid raw material left in the collecting chamber 510 is accumulated in the connecting pipeline 702, and at this time, the adjusting rod 801 extends inwards (does not block the upper end opening of the through hole 703) to enable the spacer 810 not to block the upper end orifice of the communication pipeline 702 any more, so that the liquid raw material can be sprayed into the feeding cylinder, and then a small amount of liquid raw material on the inner wall of the collecting chamber 510 is removed, so that the collecting chamber 510 is cleaner.

Specifically, as shown in fig. 6 and fig. 8-11, the power source of the second driving assembly 301 is an electromagnet, a permanent magnet 610 is fixedly mounted at the lower end of the piston assembly 601, and the permanent magnet 610 is an alnico magnet. Under the condition that the volume of the collection chamber 510 is smaller, the device needs to be provided with a plurality of devices for absorbing liquid raw materials, and the piston assembly 601 is driven in a driving mode of an electromagnet and a permanent magnet in a small volume, so that a quick response can be obtained, the magnetic force attenuation is small in a short stroke, the comprehensive effect is better than that of a mechanical type, a complex transmission mechanism is not required, and the volume occupation is small. However, since the collecting chamber 510 is in a high-temperature and high-pressure environment, the distribution of the magnetic field is affected, the magnetic force of the permanent magnet is attenuated or even fails, the temperature in the feeding cylinder is generally 230-320 ℃, the melting point temperature of the PC material is 230-240 ℃, and if the permanent magnet is ferrite or neodymium-iron-boron, a better driving effect cannot be obtained in the environment, the permanent magnet is made of an aluminum-nickel-cobalt material, the attenuation failure temperature is 450-900 ℃, and the stability is better.

Specifically, as shown in fig. 7, the power source of the second driving assembly 301 is a motor or a hydraulic assembly, the second driving assembly 301 is provided with a driving rod 302, the upper end of the driving rod 302 is fixedly connected with the piston assembly 601, and the lower end of the driving rod 302 is accommodated in the first driving assembly 201 or in the first driving assembly 201 and the electric appliance support 101, and the motor or the hydraulic assembly drives the driving rod 302 to slide up and down. In the case that the volume of the collection chamber 510 is large (the stroke is long), the pressure relief buffering can be performed by a small number of devices, and at this time, the power source of the second driving assembly 301 is a motor or a hydraulic assembly, so that a better driving effect can be obtained, and the position adjustment of the piston assembly 601 is more accurate and stable, so that the scene adaptability is stronger, but the structure is relatively more complex, and the quick response capability is also not strong. Therefore, the power source of the second driving assembly 301 needs to be selected according to the actual situation.

Specifically, as shown in fig. 8-11, the outer side surface of the connecting portion 720 is an arc surface or an inclined surface, and the liquid inlet 502 is provided with a first mating surface 503 that mates with the outer side surface of the connecting portion 720; the upper end opening of the through hole 703 is provided with a second mating surface 704 that mates with the outer surface of the ball 910. The purpose is to make the sealing effect between the components better, the resistance of the inclined plane/cambered surface to the injected liquid raw material is also smaller than that of the inclined plane/cambered surface facing the right angle, and the residual and adhered liquid raw material is also smaller because no angle of the small angle crutch exists. Further, the edge of the mating groove 602 is provided with an inclined surface or an arc surface inclined to the outside, so that the inclined surface or the arc surface inclined to the outside can better collect the liquid raw material when the piston assembly 601 compresses/feeds, and accelerate the liquid raw material to enter the communication pipeline 702.

It should be noted that, when the piston assembly 601 does work, compressed gas and liquid realize a certain level of buffering, and vibration generated after collision is damped through the external damping support. As shown in fig. 12, the device body 10 is generally mounted on the outer side wall of the feed cylinder 40 and provided with a plurality of feed bars 30 in the feed cylinder 40, which are telescopic feed bars (hydraulically driven) with spiral outer rings, and the device body 10 is generally not in contact with the injection line 20.

It should be noted that, in fig. 8, the device is in an unopened device, and no collecting or draining action is performed, the piston assembly 601 may be moved forward by a certain distance, so that the internal pressure of the collecting chamber 510 is increased, the pressure intensity of the sealing panel 710 is increased, the capacity of the movable member 701 against the internal pressure of the feeding cylinder can be increased by cooperating with the spring 410, and then the pressure intensity of the starting liquid of the device is adjusted, so that the opening pressure intensity of the movable member 701 is adjusted without changing the spring, but the liquid storage capacity of the device is reduced relatively, and the comprehensive liquid storage capacity is ensured because the device is provided with a plurality of devices. FIG. 9 is a view showing the apparatus performing a discharging operation of the liquid raw material; fig. 10 shows a liquid feeding operation of the apparatus, wherein the liquid raw material in the feeding cylinder can press the movable member 701 into the feeding cylinder, or the front end of the feeding rod can contact with the ball head 910 to press the movable member 701 into the feeding cylinder; FIG. 11 shows the device pressurizing the communication pipeline 702, wherein the movable rod 901 extends outwards, the residual liquid is sprayed out after being pressurized, then the piston assembly 601 moves backwards slowly and resets, the collecting chamber 510 is communicated with the feeding cylinder during resetting, the pressure difference between the inside and the outside is balanced, and the collecting chamber 510 does not generate strong suction force due to the slow resetting of the piston assembly 601, so that the amount of the re-sucked liquid raw material is reduced when the pressure difference is balanced; further, the collection chamber 510 may be connected to the outside through a gas path to balance the pressure difference, for example: by replacing the blocking member 540 with the delivery member 550, the collection chamber 510 is not in communication with the cartridge during this embodiment, which is more common because it is not affected by the cartridge, but the cost becomes higher and the fault tolerance becomes lower.

And a corresponding control method, comprising:

s010, a controller of the device monitors whether the injection molding feeding rod carries out forward feeding or backward resetting, and the controller is in data interconnection with the injection molding machine to realize monitoring;

s011, when the material is injected forward, the first driving component 201 drives the adjusting rod 801 to move downwards for locking, the second driving component 301 drives the piston component 601 to move downwards for locking, and if the pressure in the feeding cylinder reaches a trigger threshold value during the period, the movable component 701 is pressed in, so that liquid raw materials are collected and decompressed for buffering;

s012, when the backward reset is performed, the first driving component 201 drives the adjusting rod 801 to move upwards, then the second driving component 301 drives the piston component 601 to perform forward and backward reciprocating motions for a plurality of times, when the backward reset is completed or after a preset time period, the first driving component 201 drives the adjusting rod 801 to move downwards for locking, and the second driving component 301 drives the piston component 601 to move downwards for locking for liquid discharge;

s020, when injection molding is performed, the heating part of the adjusting rod 801 heats the collecting chamber 510 to 250-320 ℃ so that the raw materials are kept in liquid, the blockage is avoided, and a high-temperature and high-pressure environment is manufactured;

s030, collecting chamber pressure adjustment, wherein the first driving assembly 201 drives the adjusting rod 801 to move downwards for locking, the second driving assembly 301 drives the piston assembly 601 to move forwards for a preset distance and locks the piston assembly 601 after the piston assembly 601 is completed, so that the pressure of the movable part 701 is adjusted and opened;

s040, cleaning the collecting chamber, when the collecting chamber 510 needs to be cleaned, removing the sealing member 540, observing whether the sealing member 530 installed in the connecting hole 521 has a problem, and replacing if the problem occurs, otherwise, installing the conveying member 550 in the connecting hole 521, then connecting the collecting chamber 510 with external cleaning equipment through the conveying member 550 and cleaning, removing the conveying member 550 after cleaning is completed, and resetting the sealing member 540.

In summary, according to the invention, the electrical appliance support, the first driving assembly, the second driving assembly, the supporting piece, the collecting cylinder, the piston assembly and other components are connected together through the ingenious structure, the plugging piece and the conveying piece are arranged on the collecting cylinder, and the corresponding adjustment and control methods are matched, so that when injection molding feeding is realized, the excessive/unstable internal pressure of the feeding cylinder is realized, the movable pieces of the pressure relief reflux devices are opened under the pressure difference, the liquid raw materials enter the collecting cavity to reduce the internal pressure of the feeding cylinder, the time for adjusting the hydraulic loop of the feeding rod by a worker is further increased, and the fault tolerance redundancy is improved;

The foregoing examples are merely representative of one or more embodiments of the present invention and are described in more detail and are not to be construed as limiting the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of the invention should be assessed as that of the appended claims.

Claims

1. An external cleaning and refluxing device of an injection molding and feeding device, which is characterized by comprising: the electric appliance support is used for installing electronic equipment;

the movable part is internally provided with a through hole penetrating through the upper end and the lower end of the movable part, the upper end of the movable part is a connecting part, the shape of the connecting part is matched with the liquid inlet, the lower side of the connecting part is provided with a sealing display plate extending outwards, the shape of the sealing display plate is matched with the matched groove, the connecting part is provided with a communicating pipeline, the upper end pipe orifice of the communicating pipeline is connected with the through hole, the lower end pipe orifice of the communicating pipeline is connected with the lower side surface of the sealing display plate or is arranged on the lower side of the sealing display plate, the movable part is arranged in the collecting cavity, the piston assembly is sleeved on the movable part, the piston assembly is tightly connected with the movable part, and the lower end of the movable part is abutted to the spring;

2. The external cleaning and refluxing device of injection molding feeding equipment according to claim 1, wherein a first step and a second step are sequentially arranged in the connecting hole, the sealing element is installed on the first step, the plugging element or the conveying element is installed on the second step, the plugging element is tightly connected with the sealing element, and the conveying element is tightly connected with the sealing element.

3. An external cleaning and refluxing device for injection molding and feeding equipment according to claim 1 or 2, wherein the sealing element is annular, the end face of the sealing element facing the inner side is a matching end face, and the radian of the matching end face is consistent with the radian of the side wall of the collecting chamber.

4. The external cleaning and refluxing device for injection molding and feeding equipment according to claim 1, wherein the upper end opening of the through hole is provided with a second matching surface matched with the outer surface of the ball head.

5. The external cleaning reflow apparatus of an injection molding apparatus of claim 1, further comprising: the isolating ring is sleeved at the lower end of the movable rod and is tightly connected with the side wall of the through hole.

6. The external cleaning and refluxing device for injection molding feeding equipment according to claim 1, wherein the power source of the second driving assembly is an electromagnet, a permanent magnet is fixedly arranged at the lower end of the piston assembly, and the permanent magnet is an alnico magnet.

7. The external cleaning and refluxing device of injection molding feeding equipment according to claim 1, wherein a power source of the second driving assembly is a motor or a hydraulic assembly, a driving rod is installed on the second driving assembly, the upper end of the driving rod is fixedly connected with the piston assembly, the lower end of the driving rod is contained in the first driving assembly or in the first driving assembly and the electric appliance support, and the motor or the hydraulic assembly drives the driving rod to slide up and down.

8. The external cleaning reflux device of injection molding feeding equipment according to claim 1, wherein the outer side surface of the connecting portion is an arc surface or an inclined surface, and the liquid inlet hole is provided with a first matching surface matched with the outer side surface of the connecting portion.

9. An external cleaning reflux device of an injection molding feeding device according to claim 1, wherein the edge of the mating groove is provided with an inclined surface or cambered surface inclined to the outside.

10. A control method of an external cleaning reflux apparatus of an injection molding feeding apparatus according to any one of claims 1 to 9, comprising: