CN107856261A - Injection melten gel controlling organization and its control method - Google Patents

Abstract

The invention discloses a glue injection control mechanism and a control method thereof, wherein, the glue injection control mechanism includes a shell provided with a connected melt cavity and a glue injection cavity, and a casing provided in the melt cavity. The melt glue screw in the interior, the plunger rod set in the glue injection chamber, the glue injection ball screw, the glue injection ball cylinder, the glue melt motor and the glue injection motor; the motor shaft of the glue melt motor is connected to the Melt glue screw; one end of the glue injection ball cylinder is fixedly connected to the motor shaft of the glue injection motor, the other end is adapted to match the peripheral surface of the glue injection ball screw, and one end of the plunger rod is connected to the The glue-injecting ball screw is located on the end face outside the glue-injecting ball cylinder, and the other end is used to actively push the melt glue in the glue-injecting chamber to be ejected from the nozzle of the glue-injecting chamber. The technical scheme of the invention can realize high-precision injection molding of the glue injection and melt glue control mechanism.

Description

Injection melt glue control mechanism and its control method

technical field

The invention relates to the technical field of injection molding equipment, in particular to an injection melt control mechanism and a control method thereof.

Background technique

In the prior art, in order to simplify the structure and operation process of the glue injection melt control mechanism, the two processes of glue melt and glue injection are usually realized through the same driving device; The structure of the glue, because the surrounding surface has threads for extruding the melt, will reduce the injection accuracy of the melt to a certain extent during the injection process, which cannot meet the needs of high-precision injection molding.

Contents of the invention

The main purpose of the present invention is to propose a control mechanism for glue injection, aiming at solving the technical problem that the glue injection control mechanism in the prior art combines melt glue and glue injection into one, which reduces the precision of glue injection.

In order to achieve the above object, the glue injection control mechanism proposed by the present invention includes a shell provided with a connected melt chamber and an injection chamber, a melt screw arranged in the melt chamber, and a Describe the plunger rod in the injection chamber, the injection ball screw, the injection ball cylinder, the melting motor and the injection motor;

The motor shaft of the glue-melting motor is connected to the glue-melting screw; one end of the rubber-injecting ball cylinder is fixedly connected to the motor shaft of the glue-injecting motor, and the other end is adapted to match the circumference of the glue-injecting ball screw. One end of the plunger rod is connected to the end surface of the injection ball screw located outside the injection ball cylinder, and the other end is used to actively push the melt in the injection cavity from the injection cavity. nozzle ejected.

Preferably, the melt glue chamber includes a connected material storage chamber and a feed chamber, the feed chamber is provided with a feed port, the melt glue screw is arranged in the feed chamber, and the material storage chamber communicate with the injection cavity;

The connection between the feed chamber and the storage chamber is provided with a sealant ring, and the end of the melt screw away from the melt motor can movably seal the ring opening of the sealant ring, so that when the melt is stored. Opening the ring opening of the sealing ring to allow the melt to pass through, and closing the ring opening of the sealing ring to prevent the melt from overflowing into the feeding cavity when injecting glue.

Preferably, the glue-melting screw has a first end and a second end oppositely arranged, the first end of the glue-melting screw is connected to the motor shaft of the glue-melting motor through a screw coupling, and the screw coupling The shaft device has a sliding chamber extending in the same direction as the melting glue screw, the first end of the melting glue screw slides in the sliding chamber, and drives the second end of the melting glue screw to open or close the sealing glue The mouth of the ring.

Preferably, the second end of the melt glue screw is provided with a screw head, the screw head passes through the ring opening of the sealing ring, and the peripheral surface is provided with an abutment ring portion, the diameter of the abutment ring portion The radial dimension is greater than the radial dimension of the ring opening of the sealing ring.

Preferably, the housing further includes a drive chamber communicating with the injection chamber, the plunger rod movably passes through the connection between the injection chamber and the drive chamber, the injection ball screw, the injection ball Both the cylinder and the motor shaft of the injection motor are arranged in the drive cavity, and the plunger rod is connected to the end of the injection ball screw located outside the injection ball cylinder through a connecting seat.

Preferably, the plunger rod is cylindrical, and the diameter of the end surface ranges from 3 mm to 7 mm.

Preferably, the injection melt control mechanism also includes a mobile platform, the mobile platform includes a drive part and a movable part that are movably connected to each other, the housing is installed on the movable part, and the drive part is used to control The movable part moves to drive the housing to change the position of the nozzle.

Preferably, the driving part includes a moving table motor, a screw coupling, and a moving table ball screw, and the moving table ball screw is connected to the motor shaft of the moving table motor through the screw coupling, The extension direction of the ball screw of the moving table is consistent with the plunger rod; the movable part is a connecting slide seat, and the connecting slide seat has a thread cavity adapted to the peripheral surface of the ball screw rod of the moving table; The motor of the moving table drives the ball screw of the moving table to rotate to drive the connecting slide to move and change the position of the nozzle.

The present invention also proposes a control method for glue injection, which is used for a glue injection control mechanism. The control method for glue injection includes the following steps in sequence:

Step S10, preparing plastic raw materials;

Step S20, putting the plastic raw material into the melt cavity from the feed port of the injection melt control mechanism;

Step S30, controlling the melt glue motor of the injection melt glue control mechanism to drive the melt glue screw in the melt glue chamber to rotate, extruding the plastic raw materials in the melt glue chamber into melt glue, and transporting to Injection cavity, the melt extrudes the plunger rod in the injection cavity to move toward the nozzle side away from the injection cavity;

Step S40, when the amount of molten glue in the injection chamber reaches a preset value, control the operation of the injection motor to drive the rotation of the injection ball cylinder and the movement of the injection ball screw to drive the plunger rod Move toward one side of the nozzle to eject the melt glue in the injection cavity from the nozzle.

Preferably, between step S30 and step S40, it also includes:

Step S31 , controlling the movement of the mobile platform of the injection melt control mechanism to drive the movement of the melt cavity and the housing where the injection cavity is located, and change the position of the nozzle.

Preferably, it also includes:

A position loop control program for regulating the position deviation of the plunger rod and the position deviation of the nozzle during the movement of the plunger rod and the nozzle; and/or

A speed loop control program for regulating the speed deviation of the plunger rod and the speed deviation of the nozzle during the movement of the plunger rod and the nozzle; and/or

A current loop control program for adjusting the current deviation reflected by the thrust of the plunger rod during the movement of the plunger rod; and/or

A process safety control program for performing fault alarm and alarm release during the movement of the melt screw, plunger rod and nozzle.

The technical scheme of the present invention introduces a melt cavity and an injection cavity connected to each other in the injection melt control mechanism, and sets a melt screw in the melt cavity and a plunger rod in the injection cavity respectively, so that the melt can With the cooperation of the screw and the plunger rod, the process of melting and injecting the plastic raw materials is realized. Compared with the way in which the plastic screw is used to realize the melting and injection at the same time in the prior art, this avoids the need for screw extrusion and injection. Infection interference in the glue process improves the accuracy of the glue injection process and is conducive to the realization of high-precision injection molding of the glue injection melt control mechanism.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is the structural representation of an embodiment of the control mechanism for injection and melting of the present invention;

Fig. 2 is a partial enlarged view of place A in Fig. 1;

Fig. 3 is a schematic flow chart of an embodiment of the method for controlling the injection melt of the present invention.

Explanation of reference numbers:

label name label name 1 case 11 Melt cavity 111 Feed cavity 111a Inlet 112 storage chamber 12 Injection cavity 121 Nozzle 13 drive cavity 2 Melt glue screw twenty one screw head 3 Melting motor 31 Screw coupling 4 Sealing ring 5 plunger rod 51 Connecting seat 6 Injection ball screw 7 Injection ball cylinder 8 Injection motor 9 mobile station 91 mobile motor 92 Screw coupling 93 connecting slide 94 Moving table ball screw

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

The invention proposes a control mechanism for glue injection and melt glue.

In the embodiment of the present invention, with reference to Fig. 1 and Fig. 2, the injection melt control mechanism includes a shell 1 with a connected melt chamber 11 and an injection chamber 12 inside, and a housing 1 arranged in the melt chamber 11. Melting glue screw 2, plunger rod 5 located in the glue injection cavity 12, glue injection ball screw 6, glue injection ball cylinder 7, glue melt motor 3 and glue injection motor 8;

The motor shaft of the glue-melting motor 3 is connected to the glue-melting screw 2; one end of the rubber-injecting ball cylinder 7 is fixedly connected to the motor shaft of the glue-injecting motor 8, and the other end is adapted to the surrounding surface of the glue-injecting ball screw 6, and the plunger rod 5. One end is connected to the end surface of the injection ball screw 6 which is located outside the injection ball cylinder 7, and the other end is used to actively push the melt in the injection chamber 12 to be ejected from the nozzle 121 of the injection chamber 12.

It can be understood that after the plastic raw material is extruded into molten glue by the melt screw 2 in the melt chamber 11, it enters the injection chamber 12, and when the melt accumulates in the injection chamber 12 to a preset value, the injection motor 8 is turned on. , push the plunger rod 5 to extrude the melt glue in the injection chamber 12 and spray it out from the nozzle 121 . In this embodiment, the casing 1 is installed on a horizontal platform, and the nozzle 121 is set forward. Of course, in other embodiments, the casing 1 can also be installed on a vertical wall, and the nozzle 121 is set downward. It is not limited to this.

The technical scheme of the present invention introduces the interconnected melt cavity 11 and the injection cavity 12 into the injection control mechanism, and sets the melt screw 2 in the melt cavity 11 and the plunger rod in the injection cavity 12 respectively. 5. With the cooperation of the melting glue screw 2 and the plunger rod 5, the melting and injection process of the plastic raw materials is realized, compared with the way of simultaneously realizing the melting and injection through the plastic screw in the prior art, so , avoiding the infection and interference of thread extrusion on the injection process, thereby improving the accuracy of the injection process, and is conducive to the realization of high-precision injection molding of the injection melt control mechanism.

Further, the melt chamber 11 includes a connected storage chamber 112 and a feed chamber 111, the feed chamber 111 is provided with a feed port 111a, the melt glue screw 2 is arranged in the feed chamber 111, and the storage chamber 112 is connected to the injection chamber 111. Glue chamber 12; the connection between the feed chamber 111 and the storage chamber 112 is provided with a sealing ring 4, and the end of the melting glue screw 2 away from the melting glue motor 3 can moveably seal the ring mouth of the sealing glue ring 4, so as to be used in the melting glue storage. Open the ring opening of the sealing ring 4 for the melt to pass through when feeding, and close the ring opening of the sealing ring 4 to prevent the melt from overflowing into the feeding chamber 111 when injecting glue. It can be understood that such an arrangement can effectively prevent the molten glue from overflowing into the feed chamber 111 during glue injection, reducing the injection pressure at the nozzle 121 , so as to reduce the injection molding precision. It should be noted that the present design is not limited thereto, and in other embodiments, the connection between the feed chamber 111 and the storage chamber 112 may also be provided with a solenoid valve or a mechanical switch.

Further, the glue-melt screw 2 has a first end and a second end oppositely arranged, and the first end of the glue-melt screw 2 is connected with the motor shaft of the glue-melt motor 3 through a screw coupling 31, and the screw coupling 31 has A sliding cavity extending in the same direction as the glue screw 2 , the first end of the glue screw 2 slides in the slide cavity, driving the second end of the glue screw 2 to open or close the mouth of the sealing ring 4 . It can be understood that with such an arrangement, the sealing ring 4 can be opened or closed by sliding the melting screw 2 in the sliding cavity without affecting the normal rotation of the melting screw 2 during the melting process, which is convenient and simple. It should be noted that this design is not limited thereto. In other embodiments, the sealing ring 4 is movably arranged at the connection between the feed chamber 111 and the storage chamber 112, and can move along the extending direction of the melt screw 2 to Close to or away from the melt glue screw 2 to realize the closing or opening of the ring mouth.

Further, the second end of the melt glue screw 2 is provided with a screw head 21, the screw head 21 penetrates the ring opening of the sealing ring 4, and the peripheral surface is provided with an abutting ring portion, the radial dimension of the abutting ring portion is larger than that of the sealing ring. The radial dimension of the rubber ring 4 ring opening. It can be understood that when the glue injection and melting mechanism is not started, the abutting ring portion of the screw head 21 abuts against the inner edge of the front side of the sealing ring 4, closing the ring mouth of the sealing ring 4, and the first end of the melting screw 2 is located at One end of the sliding cavity close to the glue melting motor 3; start the injection glue melting mechanism, put the plastic raw material from the feed port 111a, the glue melting motor 3 drives the melting glue screw 2 to rotate, extrude the plastic raw material into melt glue, and feed The melt glue in the cavity 111 is continuously accumulated, and the abutting ring portion of the screw head 21 is pushed forward to open the ring mouth of the sealant ring 4 and enter the material storage chamber 112. Driven by the screw head 21, the melt glue screw 2 The first end slides to the end of the sliding chamber far away from the glue-melting motor 3; when the glue-melting mechanism has finished storing glue and glue is being injected, the glue-jet motor 8 drives the plunger rod 5 to squeeze the glue-jetting chamber 12 forward. And the melt glue in the material storage chamber 112, the melt glue in the material storage chamber 112 squeezes the abutment ring part backward, so that the abutment ring part abuts against the inner edge of the front side of the sealant ring 4 again, and closes the sealant ring 4 to prevent the melt glue in the glue injection chamber 12 from overflowing to the feed chamber 111 during the glue injection process, so as to ensure the pressure and accuracy of the glue injection place. It should be noted that the present design is not limited thereto. In other embodiments, the second end of the melt screw 2 has a sealing peripheral surface adapted to seal the sealant ring 4, and the first end of the melt screw 2 is located in the sliding cavity away from the At one end of the glue-melting motor 3, the sealing peripheral surface of the second end of the glue-melting screw rod 2 seals the inner edge of the rear side of the glue-sealing ring 4 to close the mouth of the glue-sealing ring 4, and the first end of the glue-melt screw 2 is located in the sliding chamber When the inside is close to one end of the glue-melting motor 3 , the second end of the glue-melting screw 2 is set apart from the glue-sealing ring 4 to open the mouth of the glue-sealing ring 4 .

Further, the housing 1 also includes a drive chamber 13 connected to the injection chamber 12, the plunger rod 5 movably passes through the connection between the injection chamber 12 and the drive chamber 13, the injection ball screw 6, the injection ball cylinder 7 And the motor shaft of the glue injection motor 8 is located in the drive cavity 13, the plunger rod 5 is connected to the glue injection ball screw 6 through a connecting seat 51 at an end outside the glue injection ball cylinder 7. It can be understood that the introduction of the drive chamber 13 can effectively protect the injection ball screw 6 and the injection ball cylinder 7 from being bumped by the outside, and the introduction of the connection seat 51 can effectively reduce the pressure of the plunger rod 5 and the injection cylinder 7. The connection difficulty of the ball screw 6. Specifically, when the melt glue is stored, the glue injection motor 8 is turned on but not started (the motor shaft is not driven to rotate), and the melt glue accumulated in the glue injection chamber 12 pushes the plunger rod 5 backward, so that the plunger rod 5 moves backward, drives the injection ball screw 6 to thread backward, drives the motor shaft of the injection ball cylinder 7 and the injection motor 8 to rotate in reverse; when the melt storage is completed and the injection starts, the injection motor 8 Start, the motor shaft of the glue injection motor 8 drives the glue injection ball cylinder 7 to rotate forward, drives the glue injection ball screw 6 to move forward, and drives the plunger rod 5 to squeeze the melt glue in the glue injection chamber 12 forward. Nozzle 121 ejects.

Further, the plunger rod 5 is cylindrical, and the diameter of the end surface ranges from 3 mm to 7 mm. It can be understood that the larger the diameter of the end surface of the plunger rod 5, the greater the error generated during the injection process; the smaller the diameter of the end surface of the plunger rod 5, the greater the extrusion force (jetting force of the nozzle 121) on the melt during the injection process. Small. In this embodiment, the diameter of the end face of the melt screw 2 ranges from 14 mm to 18 mm, which not only ensures the extrusion force on the plastic material, but also avoids waste of material and reduces costs; of course, in other embodiments, the plunger rod 5 can also be It is specifically other shapes, and the cross-sectional dimensions of the plunger rod 5 and the melt screw 2 can also be specific other values, and the present design is not limited thereto.

Further, the injection melt control mechanism also includes a mobile platform 9, the mobile platform 9 includes a driving part and a movable part that are movably connected to each other, the housing 1 is installed on the movable part, and the driving part is used to control the movement of the movable part to drive the shell. The body 1 moves to change the position of the nozzle 121. It can be understood that such setting enables the glue injection control structure to flexibly change the position of the nozzle 121, which is beneficial to realize the industrial intelligent production of the glue injection control structure. In this embodiment, the glue melting motor 3, the glue injection motor 8 and the motor of the mobile platform 9 are all controlled by an intelligent system to realize the intelligence of the entire injection molding process, and in the control process, the position loop control program, speed Loop control program, current loop control program and process safety control program.

Further, the drive portion includes a mobile table motor 91, a screw coupling 92 and a mobile table ball screw 94, the mobile table ball screw 94 is connected to the motor shaft of the mobile table motor 91 through the screw coupling 92, and the mobile table The extension direction of the ball screw 94 is consistent with the plunger rod 5; the movable part is a connecting slide 93, and the connecting slide 93 has a thread cavity adapted to the peripheral surface of the moving table ball screw 94; the moving table motor 91 drives the moving table The ball screw 94 rotates to drive the connecting slide 93 to move and change the position of the nozzle 121 . It can be understood that the cooperation between the screw rod and the threaded sliding seat is a widely used movable cooperation method in the prior art, and has the advantages of simple structure and stable connection. It should be noted that the present design is not limited thereto, and in other embodiments, the driving part and the movable part may also be embodied as other mutually cooperative structures.

The present invention also proposes a control method for injecting and melting glue, referring to Fig. 3, comprising the following steps in turn:

Step S10, preparing plastic raw materials;

Step S20, putting plastic raw materials into the melt cavity from the feed port of the injection melt control mechanism;

Step S30, controlling the operation of the melt glue motor of the injection melt glue control mechanism, driving the melt glue screw in the melt glue chamber to rotate, extruding the plastic raw materials in the melt glue chamber into melt glue, and transporting it to the glue injection chamber, the melt glue Squeeze the plunger rod in the injection chamber to move toward the nozzle side away from the injection chamber;

Step S40, when the amount of molten glue in the injection chamber reaches the preset value, control the injection motor to work, drive the injection ball cylinder to rotate, and the injection ball screw to move, so as to drive the plunger rod to the side of the nozzle Movement, the melt in the injection cavity is ejected from the nozzle.

Specifically, the injection sol control method includes the melt storage process and the injection injection process; the melt storage process is: the control command is issued, the melt motor is powered and rotates counterclockwise, driving the sol screw to rotate, and the plastic raw material passes through The feed port enters the melt cavity and is subjected to extrusion, shearing, exhaust, homogenization, color mixing, etc., the melt enters the injection barrel, and the plasticized melt at the front end of the plunger rod continues to accumulate. After reaching a certain density, Pressure is generated on the front end of the plunger rod, also known as melt back pressure. The pressure acts on the injection ball screw through mechanical transmission, and produces a reverse static torque (also called static current) on the motor shaft of the injection motor, which promotes injection. The motor rotates forward, the plunger rod reaches the designated position, the melt glue motor and the glue injection motor are powered off, the melt glue is plasticized and stored, and the glue injection instruction is waited for. The plastic injection process is: after the material storage is completed, the control command is issued, the injection motor is electrically reversed, the plunger rod is pushed forward, and the melt is injected into the mold cavity at high speed and high pressure. In order to prevent the product from cooling and shrinking, Apply a certain pressure to maintain the purpose of glue replenishment, reach the designated position, cut off the power of the glue injection motor, and wait for the instruction of melt glue storage.

The technical scheme of the present invention introduces a melt cavity and an injection cavity connected to each other in the injection melt control mechanism, and sets a melt screw in the melt cavity and a plunger rod in the injection cavity respectively, so that the melt can With the cooperation of the screw and the plunger rod, the process of melting and injecting the plastic raw materials is realized. Compared with the way in which the plastic screw is used to realize the melting and injection at the same time in the prior art, this avoids the need for screw extrusion and injection. Infection interference in the glue process improves the accuracy of the glue injection process and is conducive to the realization of high-precision injection molding of the glue injection melt control mechanism.

Further, between step S30 and step S40, it also includes:

Step S31 , controlling the movement of the mobile table of the injection melt control mechanism to drive the movement of the melt cavity and the shell where the injection cavity is located, and change the position of the nozzle.

It can be understood that, in this way, the glue injection control method flexibly changes the position of the nozzle, which is beneficial to realize the industrialized intelligent production of the glue injection control structure. In this embodiment, the glue melting motor, the glue injection motor and the moving table motor are all controlled by an intelligent system to realize the intelligence of the entire injection molding process. Specifically, the injection sol control method also includes a nozzle movement process before the injection process; the nozzle movement process is: the nozzle forward control command is issued, the motor of the mobile table is reversed electrically, and the nozzle is moved forward. When the nozzle reaches the designated position, the motor of the moving table is powered off; when the nozzle retreat control command is issued, the motor of the moving table rotates forward, driving the nozzle to move backward, and when the nozzle reaches the designated position, the motor of the moving table is powered off.

Further, the method for controlling the injection melt also includes:

A position loop control program for regulating the position deviation of the plunger rod and the position deviation of the nozzle during the movement of the plunger rod and the nozzle; and/or

A speed loop control program for regulating the speed deviation of the plunger rod and the speed deviation of the nozzle during the movement of the plunger rod and the nozzle; and/or

A current loop control program for adjusting the current deviation reflected by the thrust of the plunger rod during the movement of the plunger rod; and/or

It is a process safety control program for fault alarm and alarm release during the movement of the melt screw, plunger rod and nozzle.

It can be understood that the position loop control program is applied in the injection process, the melt storage process and the nozzle movement process. The position of the plunger rod and the position of the nozzle reflected by the encoder pulse feedback signal are compared with the command position. The deviation of the position of the plunger rod and the position of the nozzle is obtained, and through the digital control of PID (differential integral adjustment), the automatic and intelligent control of the position of the plunger rod and the position of the nozzle is achieved. The speed loop control program is applied in the injection process, the melt storage process and the nozzle movement process. The plunger rod moving speed reflected by the injection motor speed, the melt motor speed and the moving table motor speed reflect the nozzle. Comparing the moving speed with the command position, the deviation of the plunger rod moving speed, the speed of the melting motor and the moving speed of the nozzle is obtained, and the moving speed of the plunger rod, the speed of the melting motor and the movement of the nozzle are achieved through PID (differential and integral adjustment) digital control Speed automation intelligent control. In the injection process, the real-time torque of the injection motor reflects the thrust current signal of the plunger rod, and the feedback digital signal is compared with the current position injection pressure command to obtain the current deviation, which is passed through the PID digital Control to achieve automatic and intelligent control of injection pressure; during the process of melt storage, the melt motor is energized and rotates counterclockwise, driving the sol screw to rotate, and the plastic raw materials enter the injection port through the feeding port, feeding cavity and storage cavity. In the glue chamber, the static current signal of the glue motor is reflected by the back pressure at the front end of the plunger rod. The digital signal fed back is compared with the current position melt glue back pressure pressure current command to obtain the current deviation, and the melt glue back pressure pressure is automatically and intelligently controlled. , the plunger rod automatically retreats at a uniform speed to ensure that the molten plastic is compacted during the plasticizing process and improves the plasticizing quality; during the moving process of the nozzle, the real-time torque of the motor of the moving table is reflected against the nozzle thrust current signal, and the feedback digital The signal is compared with the nozzle pressure command at the current position to obtain the current deviation, and the nozzle pressure is automatically and intelligently controlled to ensure the maintenance force of the nozzle against the mold. The process safety control program, the safety alarm and release involved, is equipped with automatic detection and safety intelligent control program in the CPU controller, including nozzle blockage during the injection process, plunger rod anti-collision, injection motor encoder Failure, overloading of injection motor, lack of material during the melting process, failure of melting motor encoder, overloading of melting motor, nozzle anti-collision during nozzle movement, moving table motor encoder, moving table motor overloading, etc.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (11)

1. A kind of 1. injection melten gel controlling organization, it is characterised in that including it is interior provided with the melten gel chamber being connected and the housing of injection chamber, Melten gel screw rod located at the melten gel intracavitary, the plunger rod located at the injection intracavitary, injection ball screw, injection ball department Cylinder, melten gel motor and injection motor；

   The motor shaft of the melten gel motor is connected to the melten gel screw rod；The affixed injection electricity in injection ball ejector sleeve one end The motor shaft of machine, other end adaptation are arranged the side face of the injection ball screw, and described plunger rod one end connects the injection rolling Ballscrew is located at end face outside the injection ball ejector sleeve, the other end pushes the melten gel of the injection intracavitary from described to activity The nozzle of injection chamber sprays.
2. 2. injection melten gel controlling organization as claimed in claim 1, it is characterised in that the melten gel chamber includes the storing being connected Chamber and feed cavity, the feed cavity are provided with charging aperture, and for the melten gel screw rod in the feed cavity, the storage cavity connects institute State injection chamber；

   The feed cavity and the connectivity part of storage cavity are provided with sealing ring, and the one end of the melten gel screw rod away from the melten gel motor can The collar extension of sealing ring described in movable sealing, pass through, Yi Ji for melten gel to open the collar extension of the sealing ring in melten gel storing The collar extension of the sealing ring is closed during injection to be prevented in melten gel overflow to the feed cavity.
3. 3. injection melten gel controlling organization as claimed in claim 2, it is characterised in that the melten gel screw rod has what is be oppositely arranged First end and the second end, the first end of the melten gel screw rod are connected by the motor shaft of a screw rod shaft coupling and the melten gel motor Connect, the screw rod shaft coupling has the bearing of trend cunning chamber consistent with the melten gel screw rod, the first end of the melten gel screw rod Slided in the sliding intracavitary, drive the second end of the melten gel screw rod to open or close the collar extension of the sealing ring.
4. 4. injection melten gel controlling organization as claimed in claim 3, it is characterised in that the second end of the melten gel screw rod is provided with spiral shell Head, the screw head wears the collar extension of the sealing ring and side face is provided with and abuts ring portion, the radial dimension for abutting ring portion More than the radial dimension of the sealing ring collar extension.
5. 5. injection melten gel controlling organization as claimed in claim 1, it is characterised in that the housing also includes connecting the injection The driving chamber of chamber, the plunger rod activity wear the connectivity part of the injection chamber and driving chamber, the injection ball screw, injection For the motor shaft of ball ejector sleeve and injection motor in the driving chamber, the plunger rod is connected to institute by a connecting seat State one end that injection ball screw is located at outside the injection ball ejector sleeve.
6. 6. injection melten gel controlling organization as claimed in claim 1, it is characterised in that the plunger rod is straight in cylinder, end face Footpath scope is 3mm~7mm.
7. 7. the injection melten gel controlling organization as described in claim 1 to 6 any one, it is characterised in that the injection melten gel control Mechanism processed also includes mobile station, and the mobile station includes the drive division and movable part being mutually flexibly connected, and the housing is installed on On the movable part, the drive division, to drive the housing motion, changes the nozzle to control the movable part to move Position.
8. 8. injection melten gel controlling organization as claimed in claim 7, it is characterised in that the drive division include mobile station motor, Screw mandrel shaft coupling and mobile station ball screw, the mobile station ball screw are connected to the shifting by the screw mandrel shaft coupling The motor shaft of dynamic platform motor, the bearing of trend of the mobile station ball screw are consistent with the plunger rod；The movable part is one Slide is connected, the connection slide has the thread cavity being adapted to the mobile station ball screw side face；The mobile station motor Drive the mobile station ball screw to rotate, to drive the connection slide to move, change the position of the nozzle.
9. A kind of 9. control method of injection melten gel, for injection melten gel controlling organization, it is characterised in that successively including following step Suddenly：

   Step S10, plastic material is prepared；

   Step S20, the charging aperture of the plastic material from injection melten gel controlling organization is put into melten gel intracavitary；

   Step S30, the melten gel motor work of the injection melten gel controlling organization is controlled, drives the melten gel screw rod of the melten gel intracavitary Rotate, the plastic material of the melten gel intracavitary is squeezed into melten gel, and be delivered to injection chamber, the melten gel extrudes the injection chamber Interior plunger rod court deviates from the lateral movement of nozzle one of the injection chamber；

   Step S40, when the melten gel amount of the injection intracavitary reaches preset value, control the injection motor to work, drive injection Ball ejector sleeve rotates, the motion of injection ball screw, to drive a lateral movement of the plunger rod towards the nozzle, by the injection The melten gel of intracavitary sprays from the nozzle.
10. 10. the control method of injection melten gel as claimed in claim 9, it is characterised in that between step S30 and step S40 Also include：

    Step S31, the mobile station motion of the injection melten gel controlling organization is controlled, to drive melten gel chamber and injection the chamber place Housing motion, change the position of the nozzle.
11. 11. the control method of injection melten gel as claimed in claim 10, it is characterised in that also include：

    During being moved in the plunger rod and the nozzle, regulate and control the position deviation of the plunger rod and the nozzle Position deviation position ring control program；And/or

    During being moved in the plunger rod and the nozzle, regulate and control the velocity deviation of the plunger rod and the nozzle Velocity deviation speed ring control program；And/or

    In the motion process of the plunger rod, to regulate and control the electric current loop for the current deviation that the thrust of the plunger rod is reflected Control program；And/or

    During being moved in the melten gel screw rod, plunger rod and nozzle, fault alarm and alarm release are carried out Process safety control program.