A pressure relief reflux device and control method for mold injection feeding equipment

Abstract

The present invention discloses a pressure relief and reflux device for mold injection feeding equipment and a control method, which comprises: an electrical support, the electrical support is used to install electronic equipment, a first drive component installed on the electrical support, a second drive component installed on the first drive component, a collecting cylinder installed on the second drive component, a piston component installed in the collecting cylinder, a movable part installed in the collecting cylinder, an adjusting rod installed in the movable part, a movable rod installed on the adjusting rod, and other components. The movable part is started by the pressure difference between the inside and the outside, and then the collecting cylinder is connected with the feeding cylinder for pressure relief, and the piston component cooperates with the adjusting rod and the movable rod to discharge liquid, and a corresponding control method is used to achieve pressure relief of the feeding cylinder when unstable pressure is generated in the feeding cylinder, and the liquid raw material stored in the pressure relief is sent back to the feeding cylinder at a corresponding time.

Description

Technical Field

[0001] The invention relates to the field of injection molding technology equipment, and in particular to a pressure relief reflux device for mold injection molding feeding equipment and a control method thereof. Background Art

[0002] When existing plastic products are mass-produced, they are generally produced by melting raw material particles through an injection molding machine and injecting them into a mold for cooling and molding. The advantages are high degree of integration and diverse shapes.

[0003] Existing injection molding feeding equipment generally includes a telescopic feeding rod with a spiral outer ring. The feeding rod is driven by a motor to rotate and is extended and retracted by a hydraulic rod or a motor. The front end of the feeding rod is a tapered pusher. For different molds, the feeding pressure and speed are different, so the equipment needs to be adjusted in advance when changing the mold.

[0004] In order to avoid excessive feeding pressure and instability, existing feeding equipment is generally equipped with a pressure relief valve and corresponding temporary storage pipelines and return pipelines. The current return is generally to extract the liquid raw materials in the return pipeline by the suction force formed when the feeding rod returns. However, this return method is overly dependent on the return of the feeding rod. If the return speed is too low and the stroke is too short, it may cause insufficient return. The return pipeline is generally not equipped with insulation and heating devices, which may cause blockage. It is too troublesome to send the raw materials in the return pipeline back through a pump, and then adjust the corresponding oil circuit of the hydraulic rod that drives the forward movement.

[0005] Therefore, there is an urgent need for a pressure relief reflux device and a control method for a mold injection molding feeding equipment that can solve one or more of the above problems. Summary of the invention

[0006] In order to solve one or more problems existing in the prior art, the present invention provides a pressure relief reflux device and a control method for a mold injection feeding device. The technical solution adopted by the present invention to solve the above problems is: a pressure relief reflux device for a mold injection feeding device, comprising: an electrical support, the electrical support is used to install electronic equipment;

[0007] A first drive assembly, which is fixedly mounted on the electrical support, wherein the power source of the first drive assembly is any one or more of a motor, a solenoid valve, and a hydraulic assembly, and the first drive assembly is used to slide the locking member and the driving member up and down;

[0008] A second drive assembly, wherein the second drive assembly is fixedly mounted on the first drive assembly, a connecting ring is fixedly connected to the outer side of the second drive assembly, a power source of the second drive assembly is any one or more of an electromagnet, a motor, and a hydraulic assembly, and the second drive assembly is used to lock the member or drive the member to slide up and down;

[0009] A support member, the support member is installed in the second driving assembly, the support member is provided with a mounting groove, and a spring is provided in the mounting groove;

[0010] A collecting cylinder, wherein the upper end surface of the collecting cylinder is provided with a liquid inlet hole, and a collecting chamber is provided on the collecting cylinder, the opening of the collecting chamber faces downward and is connected to the liquid inlet hole, the collecting cylinder is fixedly connected to the second driving assembly and the connecting ring, and the connecting ring seals the opening of the collecting chamber;

[0011] A piston assembly, wherein the piston assembly is installed in the collecting chamber, the periphery of the piston assembly is tightly connected to the inner wall of the collecting chamber, the second driving assembly drives the piston assembly to reciprocate, and the upper end surface of the piston assembly is provided with a matching groove;

[0012] A movable part, wherein the movable part is provided with a through hole penetrating the upper and lower ends thereof, the upper end of the movable part is a connecting part, the shape of the connecting part matches the liquid inlet hole, a sealing display plate extending outward is provided at the lower side of the connecting part, the shape of the sealing display plate matches the matching groove, the connecting part is provided with a connecting pipe, the upper end pipe mouth of the connecting pipe is connected to the through hole, the lower end pipe mouth of the connecting pipe is connected to the lower side surface of the sealing display plate or is arranged at the lower side of the sealing display plate, the movable part is arranged in the collecting chamber, the piston assembly is sleeved on the movable part, the piston assembly is tightly connected to the movable part, and the lower end of the movable part abuts against the spring;

[0013] An adjusting rod, wherein the adjusting rod is provided with a heating portion, the position of the heating portion corresponds to the position of the collecting chamber, the adjusting rod is installed in the through hole, the adjusting rod passes through the supporting member and is connected to the first driving assembly and the electrical appliance support, and the first driving assembly locks or drives the adjusting rod to slide up and down;

[0014] A movable rod, the movable rod is fixedly mounted on the upper end of the adjusting rod, a ball head is provided at the upper end of the movable rod, the ball head is used to seal the upper end opening of the through hole, the ball head can extend to the outside of the liquid inlet hole, the rod body diameter of the movable rod is smaller than the diameter of the through hole, and a flow gap is provided between the rod body of the movable rod and the through hole;

[0015] The first drive assembly, the second drive assembly, and the electronic equipment in the electrical appliance support are electrically connected to an external controller.

[0016] Furthermore, it also includes: an isolation ring, which is sleeved on the lower end of the movable rod and is tightly connected to the side wall of the through hole.

[0017] Furthermore, the power source of the second driving assembly is an electromagnet, and a permanent magnet is fixedly mounted on the lower end of the piston assembly; the permanent magnet is an aluminum nickel cobalt magnet.

[0018] Furthermore, the power source of the second driving component is a motor or a hydraulic component, a driving rod is installed on the second driving component, the upper end of the driving rod is fixedly connected to the piston component, and the lower end of the driving rod is received in the first driving component, or received in the first driving component and the electrical appliance support, and the motor or hydraulic component drives the driving rod to slide up and down.

[0019] Furthermore, the outer side surface of the connecting portion is a curved surface or an inclined surface, and the liquid inlet hole is provided with a first matching surface matching with the outer side surface of the connecting portion.

[0020] Furthermore, the upper end opening of the through hole is provided with a second matching surface matching with the outer surface of the ball head.

[0021] Furthermore, the edge of the matching groove is provided with an inclined surface or a curved surface inclined outward. And a control method for a pressure relief reflux device of a mold injection feeding device, comprising:

[0022] S010, the controller of the device monitors whether the injection molding feeding rod is moving forward to inject material or moving backward to reset;

[0023] S011, when moving forward to inject material, the first drive assembly drives the adjusting rod to move downward and lock, and the second drive assembly drives the piston assembly to move downward and lock;

[0024] S012, when the rearward movement is reset, the first driving assembly drives the adjusting rod to move upward, and then the second driving assembly drives the piston assembly to perform several forward and backward reciprocating movements. When the rearward movement is reset or after a preset time period, the first driving assembly drives the adjusting rod to move downward and lock, and the second driving assembly drives the piston assembly to move downward and lock;

[0025] S020, when the injection molding work is in progress, the heating part of the adjusting rod heats the collecting chamber to 250 to 320 degrees;

[0026] S030, collecting chamber pressure adjustment, the first driving assembly drives the adjusting rod to move down and lock, the second driving assembly drives the piston assembly to move forward a preset distance and locks the piston assembly after completion.

[0027] Furthermore, it also includes: S040, the collection chamber is self-drained. When the injection molding is stopped or the injection feeding rod is moved backward and reset, the first drive component drives the adjusting rod to move upward, and then the second drive component drives the piston assembly to perform several forward and backward reciprocating movements. When the backward movement and reset are completed or after a preset time period, the first drive component drives the adjusting rod to move down and lock, and the second drive component drives the piston assembly to move down and lock.

[0028] The beneficial value achieved by the present invention is as follows: the present invention connects the above-mentioned electrical support, the first drive assembly, the second drive assembly, the support, the collection barrel, the piston assembly and other components together through an ingenious structure, and cooperates with corresponding adjustment and control methods to achieve that during injection molding feeding, the internal pressure of the feeding barrel is too large / unstable, and the movable parts of several pressure relief reflux devices are opened under the pressure difference, and the liquid raw material enters the collection chamber to reduce the internal pressure of the feeding barrel, thereby increasing the time for the staff to adjust the hydraulic circuit of the feeding rod and improving the fault tolerance redundancy; after the injection molding feeding is completed, when the feeding rod moves back to reset, the second drive assembly The movable rod is driven forward to open the through hole and the first driving assembly drives the piston assembly to reciprocate, and the feeding rod is moved backward to reduce the internal pressure of the feeding barrel, so that the liquid raw material collected in the collection chamber is sprayed into the feeding barrel. In this process, the liquid raw material is kept warm by the heating part on the adjusting rod to avoid condensation and blockage; by adjusting the distance between the piston assembly and the movable part, the internal pressure of the collection chamber is adjusted. Under the action of a larger internal pressure and a spring, the movable part can be made more difficult to be opened, so that the equipment can adapt to a larger feeding barrel pressure and will not be opened in advance, thereby ensuring stability and improving the application scale. The above greatly improves the practical value of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the present invention;

[0030] Figure 2 It is a cross-sectional view I of the present invention;

[0031] Figure 3 It is the cross-sectional view II of the present invention;

[0032] Figure 4 It is a partial enlarged view of the first state of the present invention;

[0033] Figure 5 It is a partial enlarged view of the second state of the present invention;

[0034] Figure 6 It is a partial enlarged view of the third state of the present invention;

[0035] Figure 7 It is a partial enlarged view of the fourth state of the present invention;

[0036] Figure 8 It is the installation schematic diagram of the present invention.

[0037] [Reference Signs]

[0038] 10···Device body

[0039] 20···Injection pipeline

[0040] 30···Feeding rod

[0041] 40···Feeding barrel

[0042] 101···Electrical appliance support

[0043] 201···First drive assembly

[0044] 301···Second drive assembly

[0045] 302···Drive rod

[0046] 310···Connecting ring

[0047] 401···Support

[0048] 402···Installation slot

[0049] 410···Spring

[0050] 501···Collection tube

[0051] 502···Liquid inlet

[0052] 503···First mating surface

[0053] 510···Collection chamber

[0054] 601···Piston assembly

[0055] 602···Matching groove

[0056] 610···Permanent magnet

[0057] 701···Active parts

[0058] 702···Connecting pipeline

[0059] 703···Through hole

[0060] 704···Second mating surface

[0061] 710···Sealed display board

[0062] 720···Connection

[0063] 801···Adjustment lever

[0064] 810···Isolation ring

[0065] 901···Active rod

[0066] 910···Ball Head

[0067] 920···Flow gap. DETAILED DESCRIPTION

[0068] In order to make the above-mentioned objects, features and advantages of the present invention more understandable, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from this description, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0069] like Figure 1-Figure 7 As shown, the present invention discloses a pressure relief reflux device for a mold injection feeding device, which comprises: an electrical appliance support 101, the electrical appliance support 101 is used to install electronic equipment and is fixedly connected to an external bracket / cylinder;

[0070] A first drive assembly 201, which is fixedly mounted on the electrical appliance support 101. The power source of the first drive assembly 201 is any one or more of a motor, a solenoid valve, and a hydraulic assembly. The first drive assembly 201 is used to lock the member and drive the member to slide up and down;

[0071] A second driving component 301, the second driving component 301 is fixedly mounted on the first driving component 201, a connecting ring 310 is fixedly connected to the outer side of the second driving component 301, the power source of the second driving component 301 is any one or more of an electromagnet, a motor, and a hydraulic component, and the second driving component 301 is used to lock the component or drive the component to slide up and down;

[0072] A support member 401, wherein the support member 401 is installed in the second driving assembly 301, and a mounting groove 402 is provided on the support member 401, and a spring 410 is provided in the mounting groove 402;

[0073] A collecting cylinder 501, wherein the upper end surface of the collecting cylinder 501 is provided with a liquid inlet hole 502, and the collecting cylinder 501 is provided with a collecting chamber 510, wherein the opening of the collecting chamber 510 faces downward and is connected to the liquid inlet hole 502, and the collecting cylinder 501 is fixedly connected to the second driving assembly 301 and the connecting ring 310, and the connecting ring 310 seals the opening of the collecting chamber 510;

[0074] A piston assembly 601, wherein the piston assembly 601 is installed in the collecting chamber 510, and the periphery of the piston assembly 601 is tightly connected to the inner wall of the collecting chamber 510, and the second driving assembly 301 drives the piston assembly 601 to reciprocate, and a matching groove 602 is provided on the upper end surface of the piston assembly 601;

[0075] A movable part 701, wherein the movable part 701 is provided with a through hole 703 penetrating the upper and lower ends thereof, the upper end of the movable part 701 is a connecting portion 720, the shape of the connecting portion 720 matches the liquid inlet hole 502, the lower side of the connecting portion 720 is provided with a sealing display plate 710 extending outward, the shape of the sealing display plate 710 matches the matching groove 602, the connecting portion 720 is provided with a connecting pipe 702, the upper end pipe mouth of the connecting pipe 702 is connected to the through hole 703, the lower end pipe mouth of the connecting pipe 702 is connected to the lower side surface of the sealing display plate 710 or is arranged on the lower side of the sealing display plate 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 to the movable part 701, and the lower end of the movable part 701 abuts against the spring 410;

[0076] An adjusting rod 801, wherein the adjusting rod 801 is provided with a heating portion, the position of the heating portion 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 member 401 and is connected to the first driving assembly 201 and the electrical appliance support 101, and the first driving assembly 201 locks or drives the adjusting rod 801 to slide up and down;

[0077] A movable rod 901, the movable rod 901 is fixedly mounted on the upper end of the adjusting rod 801, a ball head 910 is provided at the upper end of the movable rod 901, the ball head 910 is used to seal the upper end opening of the through hole 703, the ball head 910 can extend to the outside of the liquid inlet hole 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 provided between the rod body of the movable rod 901 and the through hole 703;

[0078] The first drive assembly 201, the second drive assembly 301, and the electronic equipment in the electrical appliance support 101 are electrically connected to an external controller, which is generally a PLC.

[0079] It should be noted that the mechanical transmission structure in the first driving assembly 201 and the second driving assembly 301 can be a push-pull structure or a gear structure, and the locking member can be in the form of snap connection or electromagnetic adsorption.

[0080] Specifically, Figure 4 As shown, it also includes: an isolation ring 810, which is sleeved on the lower end of the movable rod 901, and the isolation ring 810 is tightly connected to the side wall of the through hole 703. The isolation ring 810 is used to isolate the liquid raw material from the adjusting rod 801 to prevent the liquid raw material from seeping into the hole wall of the adjusting rod 801 and the through hole 703. If the adjusting rod 801 is tightly connected to the through hole 703, the isolation ring 810 may not be provided; the isolation ring 810 can also be used to block the upper end of the connecting pipe 702. The specific application scenario is that the adjusting rod 801 extends outward so that the isolation ring 810 blocks the upper end of the connecting pipe 702. Then the piston assembly 601 moves forward to pressurize the collecting chamber 510, and then a small amount of residual liquid raw material will gather in the connecting pipe 702. At this time, the adjusting rod 801 extends inward (without blocking the upper opening of the through hole 703) so that the isolation ring 810 no longer blocks the upper end of the connecting pipe 702, and the liquid raw material will be sprayed into the feeding barrel, thereby removing a small amount of liquid raw material on the inner wall of the collecting chamber 510, making the collecting chamber 510 cleaner.

[0081] Specifically, Figure 2 , Figure 4-Figure 7 As shown, the power source of the second drive assembly 301 is an electromagnet, and a permanent magnet 610 is fixedly installed at the lower end of the piston assembly 601, and the permanent magnet 610 is an aluminum-nickel-cobalt magnet. When the volume of the collection chamber 510 is small, the equipment needs to be set up in multiples to absorb the liquid raw material, and when the volume is small, the piston assembly 601 is driven by the driving method of the electromagnet and the permanent magnet, which can achieve a faster response, and the magnetic force attenuation is also small under short strokes. The comprehensive effect is better than the mechanical type, and there is no need to set a complex transmission mechanism, and the volume occupancy is also small. However, due to the high temperature and high pressure environment in the collection chamber 510, the distribution of the magnetic field will be affected, resulting in the magnetic force attenuation or even failure of the permanent magnet, and the temperature in the feeding barrel is generally 230-320 degrees, and the melting point temperature of the PC material is 230-240 degrees. If the permanent magnet is ferrite or neodymium iron boron, a good driving effect cannot be achieved under this environment, so the permanent magnet is made of aluminum-nickel-cobalt material, and its attenuation failure temperature is 450-900 degrees, and the stability is better.

[0082] Specifically, Figure 3 As shown, the power source of the second drive assembly 301 is a motor or a hydraulic assembly, and a drive rod 302 is installed on the second drive assembly 301. The upper end of the drive rod 302 is fixedly connected to the piston assembly 601, and the lower end of the drive rod 302 is received in the first drive assembly 201, or received in the first drive assembly 201 and the electrical appliance support 101, and the motor or hydraulic assembly drives the drive rod 302 to slide up and down. In the case where the volume of the collection chamber 510 is large (long stroke), pressure relief buffering can be performed by a small number of devices. At this time, the power source of the second drive assembly 301 is a motor or a hydraulic assembly, which can achieve a better driving effect, and the position adjustment of the piston assembly 601 is more accurate and stable, and the scene adaptability is also stronger, but the structure is relatively more complex and the rapid response capability is not strong. Therefore, the power source of the second drive assembly 301 needs to be selected according to the actual situation.

[0083] Specifically, Figure 4-Figure 7 As shown, the outer side surface of the connecting portion 720 is an arc surface or an inclined surface, and the liquid inlet hole 502 is provided with a first mating surface 503 that matches 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 matches the outer surface of the ball head 910. The purpose is to make the sealing effect between the components better, and the inclined surface / arc surface relative to the right angle to the injection of liquid raw materials is also smaller. Since there is no corner with a small angle turn, the residual and attached liquid raw materials are also less. Furthermore, the edge of the matching groove 602 is provided with an inclined surface or an arc surface inclined toward the outside. When the piston assembly 601 is compressed / feeding, the inclined surface or arc surface inclined toward the outside can better gather the liquid raw material and accelerate the liquid raw material to enter the connecting pipeline 702.

[0084] It should be noted that when the piston assembly 601 is working, the compressed gas and liquid are buffered to a certain extent, and the vibration generated after the collision is damped by the external shock-absorbing support. Figure 8 As shown, the device body 10 is generally installed on the outer wall of the feeding barrel 40 and is arranged in plurality. The feeding rod 30 in the feeding barrel 40 is a telescopic feeding rod (hydraulically driven) with a spiral outer ring. The device body 10 generally does not contact the injection pipeline 20 arranged opposite thereto.

[0085] It should be pointed out that Figure 4When the device is not in the open position and does not collect or discharge liquid, the piston assembly 601 can move forward a certain distance to increase the internal pressure of the collection chamber 510, so that the sealing display plate 710 is subjected to greater pressure. In conjunction with the spring 410, the ability of the movable part 701 to resist the internal pressure of the feed barrel can be increased, thereby adjusting the starting liquid inlet pressure of the device, so that there is no need to replace the spring to adjust the opening pressure of the movable part 701, but its liquid storage capacity will be reduced relatively. However, since the device is provided with multiple springs, the comprehensive liquid storage capacity can still be guaranteed. Figure 5 Discharge liquid raw materials for the equipment; Figure 6 The liquid feeding action of the device may be that the liquid raw material in the feeding barrel presses the movable part 701 in, or the front end of the feeding rod contacts the ball head 910 to press the movable part 701 in; Figure 7 The device pressurizes the connecting pipeline 702, and then the movable rod 901 extends outward in a step, and the remaining liquid is ejected after pressurization, and then the piston assembly 601 slowly moves back and resets. During the reset period, the collecting chamber 510 is connected with the feeding barrel to balance the internal and external pressure difference. Since the piston assembly 601 slowly resets, the collecting chamber 510 will not generate a strong suction force, thereby reducing the amount of liquid raw material sucked in again when balancing the pressure difference; further, the collecting chamber 510 can be connected to the outside through an air path to balance the pressure difference. When this embodiment is carried out, the collecting chamber 510 is not connected with the feeding barrel. Since it is not affected by the feeding barrel, this embodiment is more commonly used, but the cost will be higher and the fault tolerance will be lower.

[0086] And, a control method for a pressure relief reflux device of a mold injection feeding device, comprising:

[0087] S010, the controller of the device monitors whether the injection molding feeding rod is moving forward to inject material or moving backward to reset, and the controller is interconnected with the injection molding machine to realize monitoring;

[0088] S011, when moving forward to inject material, the first drive assembly 201 drives the adjustment rod 801 to move down and lock, and the second drive assembly 301 drives the piston assembly 601 to move down and lock. During this period, if the pressure in the feeding barrel reaches the trigger threshold, the movable part 701 is pressed in, thereby collecting the liquid raw material and reducing pressure for buffering;

[0089] S012, when the rearward movement is reset, the first driving component 201 drives the adjusting rod 801 to move upward, and then the second driving component 301 drives the piston component 601 to perform several forward and backward reciprocating movements. When the rearward movement is reset or after a preset time period, the first driving component 201 drives the adjusting rod 801 to move downward and lock, and the second driving component 301 drives the piston component 601 to move downward and lock to discharge liquid;

[0090] S020, when the injection molding is in progress, the heating part of the adjusting rod 801 heats the collecting chamber 510 to 250 to 320 degrees, so that the raw material remains liquid and avoids clogging, while creating a high temperature and high pressure environment;

[0091] S030, collecting chamber pressure adjustment, the first driving assembly 201 drives the adjusting rod 801 to move down and lock, the second driving assembly 301 drives the piston assembly 601 to move forward a preset distance and locks the piston assembly 601 after completion, so as to adjust the pressure of opening the movable member 701;

[0092] S040, the collection chamber is self-drained. When the injection molding is stopped or the injection feeding rod is moved backward and reset, the first drive component 201 drives the adjusting rod 801 to move upward, and then the second drive component 301 drives the piston component 601 to perform several forward and backward reciprocating movements. When the backward movement and reset are completed or after a preset time period, the first drive component 201 drives the adjusting rod 801 to move down and lock, and the second drive component 301 drives the piston component 601 to move down and lock, in order to clean the collection chamber 510.

[0093] In summary, the present invention connects the above-mentioned electrical support, the first drive assembly, the second drive assembly, the support, the collection cylinder, the piston assembly and other components together through an ingenious structure, and cooperates with corresponding adjustment and control methods to achieve that during injection molding and feeding, the internal pressure of the feeding cylinder is too large / unstable, and the movable parts of several pressure relief reflux devices are opened under the pressure difference, and the liquid raw material enters the collection chamber to reduce the internal pressure of the feeding cylinder, thereby increasing the time for the staff to adjust the hydraulic circuit of the feeding rod and improving the fault tolerance redundancy; after the injection molding and feeding are completed, when the feeding rod moves back and resets, the second drive assembly drives The movable rod moves forward to open the through hole and the first driving assembly drives the piston assembly to reciprocate, and then cooperates with the feeding rod to move backward to reduce the internal pressure of the feeding barrel, so that the liquid raw material collected in the collection chamber is sprayed into the feeding barrel. In this process, the liquid raw material is kept warm by the heating part on the adjustment rod to avoid condensation and blockage; by adjusting the distance between the piston assembly and the movable part, the internal pressure of the collection chamber is adjusted. Under the action of a larger internal pressure and a spring, the movable part can be made more difficult to be opened, thereby enabling the device to adapt to a larger feeding barrel pressure and will not be opened in advance, thereby ensuring stability and improving the application scale. The above greatly improves the practical value of the present invention.

[0094] The above-described embodiments only express one or more implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A pressure relief reflux device for a mold injection molding feeding device, characterized in that: include: An electrical appliance support, wherein the electrical appliance support is used to install electronic equipment; A first drive assembly, which is fixedly mounted on the electrical support, wherein the power source of the first drive assembly is any one or more of a motor, a solenoid valve, and a hydraulic assembly, and the first drive assembly is used to slide the locking member and the driving member up and down; A second drive assembly, wherein the second drive assembly is fixedly mounted on the first drive assembly, a connecting ring is fixedly connected to the outer side of the second drive assembly, a power source of the second drive assembly is any one or more of an electromagnet, a motor, and a hydraulic assembly, and the second drive assembly is used to lock the member or drive the member to slide up and down; A support member, the support member is installed in the second driving assembly, the support member is provided with a mounting groove, and a spring is provided in the mounting groove; A collecting cylinder, wherein the upper end surface of the collecting cylinder is provided with a liquid inlet hole, and a collecting chamber is provided on the collecting cylinder, the opening of the collecting chamber faces downward and is connected to the liquid inlet hole, the collecting cylinder is fixedly connected to the second driving assembly and the connecting ring, and the connecting ring seals the opening of the collecting chamber; A piston assembly, wherein the piston assembly is installed in the collecting chamber, the periphery of the piston assembly is tightly connected to the inner wall of the collecting chamber, the second driving assembly drives the piston assembly to reciprocate, and the upper end surface of the piston assembly is provided with a matching groove; A movable part, wherein the movable part is provided with a through hole penetrating the upper and lower ends thereof, the upper end of the movable part is a connecting part, the shape of the connecting part matches the liquid inlet hole, a sealing display plate extending outward is provided at the lower side of the connecting part, the shape of the sealing display plate matches the matching groove, the connecting part is provided with a connecting pipe, the upper end pipe mouth of the connecting pipe is connected to the through hole, the lower end pipe mouth of the connecting pipe is connected to the lower side surface of the sealing display plate or is arranged at the lower side of the sealing display plate, the movable part is arranged in the collecting chamber, the piston assembly is sleeved on the movable part, the piston assembly is tightly connected to the movable part, and the lower end of the movable part abuts against the spring; An adjusting rod, wherein the adjusting rod is provided with a heating portion, the position of the heating portion corresponds to the position of the collecting chamber, the adjusting rod is installed in the through hole, the adjusting rod passes through the supporting member and is connected to the first driving assembly and the electrical appliance support, and the first driving assembly locks or drives the adjusting rod to slide up and down; A movable rod, the movable rod is fixedly mounted on the upper end of the adjusting rod, a ball head is provided at the upper end of the movable rod, the ball head is used to seal the upper end opening of the through hole, the ball head can extend to the outside of the liquid inlet hole, the rod body diameter of the movable rod is smaller than the diameter of the through hole, and a flow gap is provided between the rod body of the movable rod and the through hole; The first drive assembly, the second drive assembly, and the electronic equipment in the electrical appliance support are electrically connected to an external controller.

2. A pressure relief reflux device for mold injection feeding equipment according to claim 1, characterized in that: Also includes: An isolation ring is sleeved on the lower end of the movable rod and is tightly connected to the side wall of the through hole.

3. The pressure relief reflux device of the mold injection feeding equipment according to claim 1, characterized in that: The power source of the second driving assembly is an electromagnet, and a permanent magnet is fixedly mounted on the lower end of the piston assembly.

4. A pressure relief reflux device for mold injection feeding equipment according to claim 3, characterized in that: The permanent magnet is an AlNiCo magnet.

5. The pressure relief reflux device of the mold injection feeding equipment according to claim 1, characterized in that: The power source of the second driving component is a motor or a hydraulic component. A driving rod is installed on the second driving component. The upper end of the driving rod is fixedly connected to the piston component. The lower end of the driving rod is received in the first driving component, or received in the first driving component and the electrical appliance support. The motor or hydraulic component drives the driving rod to slide up and down.

6. The pressure relief reflux device of the mold injection feeding equipment according to claim 1, characterized in that: The outer side surface of the connecting portion is a curved surface or an inclined surface, and the liquid inlet hole is provided with a first matching surface that matches with the outer side surface of the connecting portion.

7. The pressure relief reflux device of the mold injection feeding equipment according to claim 1, characterized in that: The upper end opening of the through hole is provided with a second matching surface matching with the outer surface of the ball head.

8. The pressure relief reflux device of the mold injection feeding equipment according to claim 1, characterized in that: The edge of the matching groove is provided with an inclined surface or a curved surface inclined toward the outside.

9. A method for controlling a pressure relief reflux device of a mold injection feeding device as claimed in any one of claims 1 to 8, characterized in that: include: S010, the controller of the device monitors whether the injection molding feeding rod is moving forward to inject material or moving backward to reset; S011, when moving forward to inject material, the first drive assembly drives the adjusting rod to move downward and lock, and the second drive assembly drives the piston assembly to move downward and lock; S012, when the rearward movement is reset, the first driving assembly drives the adjusting rod to move upward, and then the second driving assembly drives the piston assembly to perform several forward and backward reciprocating movements. When the rearward movement is reset or after a preset time period, the first driving assembly drives the adjusting rod to move downward and lock, and the second driving assembly drives the piston assembly to move downward and lock; S020, when the injection molding work is in progress, the heating part of the adjusting rod heats the collecting chamber to 250 to 320 degrees; S030, collecting chamber pressure adjustment, the first driving assembly drives the adjusting rod to move down and lock, the second driving assembly drives the piston assembly to move forward a preset distance and locks the piston assembly after completion.

10. The control method of the pressure relief reflux device of the mold injection feeding equipment according to claim 9, characterized in that: Also includes: S040, the collection chamber is self-drained. When the injection molding is stopped or the injection feeding rod is moved backward and reset, the first drive component drives the adjusting rod to move upward, and then the second drive component drives the piston assembly to perform several forward and backward reciprocating movements. When the backward movement and reset are completed or after a preset time period, the first drive component drives the adjusting rod to move downward and lock, and the second drive component drives the piston assembly to move downward and lock.

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