CN116619669A - An all-electric squeeze injection conversion injection molding device - Google Patents

Abstract

The invention provides an all-electric extrusion conversion injection molding device, which relates to the technical field of pre-molded injection molding devices. The device includes a pre-plastic unit and an injection unit. A rotary valve is installed between the feeding end of the pre-plastic unit and the discharge end of the injection unit. The pre-plastic unit communicates with the injection unit through the rotary valve. The unit and the injection unit are extruded separately or simultaneously through the rotary valve. The extrusion pressure of the pre-plastic unit is greater than that of the injection unit. The pre-plastic unit and the injection unit are electrically connected with a control unit. The outlet of the rotary valve The end monitors the pressure through the control unit, and the rotary valve is electrically connected with the control unit. This application can automatically switch between high and low pressure extrusion working modes. Through the switching mode, a sufficient amount of plasticized material can be injected into the mold cavity to achieve high injection pressure, high-speed injection and stable working performance. The working mode is flexible and creates large-scale products. condition.

Description

An all-electric extrusion conversion injection molding device

technical field

The invention relates to the technical field of pre-molded injection molding devices, in particular to an all-electric extrusion conversion injection molding device.

Background technique

In the current pre-molding injection molding technology, the pre-molding storage and injection molding operations are performed separately, that is, when the pre-molding injection molding machine equipment is started, the plasticized melt per unit time will flow through the single-screw extrusion of the extruder. After the one-way valve enters the pre-plastic cylinder to store the material, the plunger in the pre-plastic cylinder pushes a certain amount of molten material stored into the mold cavity for injection molding. Therefore, when selecting pre-molding injection molding machine equipment, it is also necessary to refer to the injection capacity in the equipment parameters, and whether the injection volume of the injection molded part is within the range of the equipment injection capacity, in order to produce products with excellent performance. Furthermore, as the size, volume, and mass of large plastic components become larger and larger, the specifications and volume of traditional and standard injection machines will also increase accordingly. Therefore, the matching flexibility of equipment in the production process is reduced, and the energy consumed by it is reduced. It is also very huge. This kind of investment greatly increases the production cost of the manufacturer, so that the market price of large-scale plastic products remains high, and the investment cost is quite high. The main technical bottleneck is: the large-volume product is difficult to match with the injection volume.

Therefore, there is an urgent need for an all-electric extrusion conversion injection molding device that can automatically switch between high and low pressure extrusion working modes, and inject a sufficient amount of plasticized material into the mold cavity through the switching mode to achieve stable working performance and flexible working methods. .

Contents of the invention

The purpose of the present invention is to provide an all-electric squeeze injection conversion injection molding device, which can automatically switch between high and low pressure extrusion working modes, and inject sufficient plasticized materials into the mold cavity through the conversion mode, so as to realize high injection pressure and high-speed injection and Its stable working performance and flexible working method create conditions for forming large-scale products. The many technical effects that can be produced by the preferred technical solutions among the many technical solutions provided by the present invention are described in detail below.

To achieve the above object, the present invention provides the following technical solutions:

The present invention provides an all-electric extrusion conversion injection molding device, comprising a pre-molding unit and an injection unit, a rotary valve is installed between the feeding end of the pre-molding unit and the discharging end of the injection unit, The pre-plastic unit is in unidirectional communication with the injection rubber unit through the rotary valve, and the pre-plastic unit and the injection rubber unit are extruded separately or simultaneously through the rotary valve. The pre-plastic unit The extrusion pressure is greater than the extrusion pressure of the injection glue unit, the pre-plastic unit is electrically connected to the injection glue unit with a control unit, the outlet of the rotary valve monitors the pressure through the control unit, and the The rotary valve is electrically connected with the control unit.

Preferably, it also includes:

The discharge end, the rotary valve is installed on the discharge end, the feed end of the pre-plastic unit and the discharge end of the injection unit are respectively connected to the discharge end of the discharge end through the rotary valve. The inlet end is connected, and the pressure monitoring end of the control unit is installed close to the outlet end of the discharge end.

Preferably, the pre-molding unit includes a material storage tank, one end of the material storage tank is in fixed communication with the inlet end of the discharge end, and the injection glue unit is connected to one end of the material storage tank through the rotary valve. One-way communication, the storage cylinder is provided with a screw pusher assembly, the other end of the storage cylinder is provided with a first servo motor, and the screw pusher assembly is connected through the transmission of the first servo motor, The screw pushing assembly and the first servo motor are respectively electrically connected to the control unit.

Preferably, the screw pusher assembly includes a screw rod coaxially slidably connected in the storage cylinder, a piston part coaxially connected to one end of the screw rod, installed between the screw rod and the A load sensor at the joint of the piston part, the piston part is fixedly connected to one end of the screw rod through the load sensor, the screw rod is connected to the first servo motor in transmission, and the connection between the piston part and the rotary valve A storage chamber is formed between them, the pre-plastic unit communicates with the storage chamber through the rotary valve, and the piston part and the load sensor are respectively electrically connected to the control unit.

Preferably, the piston part includes an electronic ruler, a piston rod and a piston, one end of the piston rod is fixedly connected to one end of the screw rod through the load sensor, and the other end of the piston rod is coaxial with the piston Fixed connection, the piston is axially slidably connected to the inner wall of the storage cylinder, the storage chamber is located between the piston and the rotary valve, the electronic scale is installed on the piston rod, and the The electronic scale is electrically connected with the control unit.

Preferably, the rotary valve includes a valve body, the valve body is fixedly connected in the discharge port, and the valve body is provided with three groups of material ports and material flow channels, and the three groups of material ports are connected to the same The material flow channel is connected, and the three groups of material ports are respectively connected with the discharge end of the injection glue unit, the material storage chamber, and the discharge end of the discharge end. The valve core is rotatably connected in the material flow channel, and the outlet The outer surface of the material end is fixedly connected with a second servo motor, the valve core is driven by the output shaft of the second servo motor, and any two groups of the material ports are connected through the valve core or three groups of the material ports are connected. The second servo motor is electrically connected with the control unit through the communication of the spool.

Preferably, it also includes:

A ball screw driving assembly, the ball screw driving assembly is coaxially connected with the storage cylinder, the ball screw driving assembly is threaded on the outside of the screw rod, the ball screw The rod auxiliary drive assembly is in transmission connection with the first servo motor.

Preferably, the glue injection unit includes an extruder, and a screw is rotatably connected in the extruder, one end of the extruder communicates with a group of the feed ports, and the other end of the extruder is fixedly connected There is another group of the first servo motors, and the output shaft of the first servo motors is connected to the screw drive.

Preferably, the control unit includes an industrial controller and a pressure sensor, the industrial controller is fixedly connected to the outside of the storage tank or the extruder, and the sensing end of the pressure sensor is installed on the discharge end within the output.

In the technical solution provided by the present invention, monitoring the pressure at the outlet of the rotary valve is to monitor the pressure in the mold cavity, which is convenient for accurately identifying the state of the filling degree in the mold cavity; when the pre-plastic unit communicates with the injection unit through the rotary valve in one direction, The injection unit injects plasticized materials into the pre-molding unit; the main function of the injection unit is to perform low-pressure and low-speed injection molding, and the pre-molding unit is mainly for high-pressure and high-speed injection molding; the main function of the control unit is to control the The flow state of the rotary valve, that is, to realize the one-way injection of plasticized materials from the injection unit to the pre-molding unit or the extrusion of the injection unit to the cavity alone or the extrusion of the pre-molding unit to the cavity alone or the common use of the injection unit and the pre-molding unit Extrude to the mold cavity; on the whole, this application can automatically switch the high and low pressure extrusion working mode, and through the switching mode, a sufficient amount of plasticized material can be injected into the mold cavity to achieve high injection pressure and high-speed injection and stable working performance. The working mode is flexible, which creates conditions for forming large-scale products.

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. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the overall schematic diagram of the present invention;

Fig. 2 is a schematic cross-sectional view of a combined state of a valve body and a valve core of the present invention;

Fig. 3 is a schematic cross-sectional view of a spool of the present invention;

Fig. 4 is the schematic diagram of three groups of material openings and material flow channels of the present invention;

Fig. 5 is a schematic diagram of different communication states of the spool of the present invention.

In the figure 1-the first servo motor; 2-electronic ruler; 3-extruder; 4-storage cylinder; 5-rotary valve; 6-load sensor; 7-nozzle; 8-pressure sensor; 9-industrial controller; 10-piston rod; 11-ball screw auxiliary drive assembly; 20-material flow channel; 21-spool; 22-valve body; 23-second servo motor.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

Referring to Fig. 1-5, the specific embodiment of the present invention provides a kind of all-electric extrusion conversion injection molding device, comprises the pre-molding unit and the injection glue unit, between the material passing end of the pre-molding unit and the discharge end of the injection glue unit There is a rotary valve 5 installed between them, the pre-plastic unit is in one-way communication with the injection unit through the rotary valve 5, the pre-plastic unit and the injection unit are extruded separately or simultaneously through the rotary valve 5, and the extrusion pressure of the pre-plastic unit is greater than The extrusion pressure of the injection unit, the pre-plastic unit and the injection unit are electrically connected to a control unit, the outlet of the rotary valve 5 monitors the pressure through the control unit, and the rotary valve 5 is electrically connected to the control unit.

Monitoring the pressure at the outlet of the rotary valve 5 is to monitor the pressure in the mold cavity, so as to accurately identify the filling state of the cavity; when the pre-plastic unit communicates with the injection unit through the rotary valve 5, the injection unit will The unit injects plasticized materials; the main function of the injection unit is to perform low-pressure and low-speed injection molding functions, and the pre-plastic unit is mainly for high-pressure and high-speed injection molding; the main function of the control unit is to control the circulation state of the rotary valve 5 according to the monitored pressure value , that is to realize the one-way injection of plasticized materials from the injection unit to the pre-molding unit, or the injection unit extrudes into the cavity alone, or the pre-molding unit independently extrudes into the cavity, or the injection unit and the pre-molding unit jointly extrude into the cavity ; On the whole, this application can automatically switch between high and low pressure extrusion working modes, and through the switching mode, a sufficient amount of plasticized material can be injected into the mold cavity to achieve high injection pressure and high-speed injection and stable working performance. Create conditions for forming large-scale products.

Further optimization schemes also include:

The discharge end, the rotary valve 5 is installed on the discharge end, the feed end of the pre-plastic unit and the discharge end of the injection unit are respectively connected with the inlet end of the discharge end through the rotary valve 5, and the pressure of the control unit The monitoring end is installed close to the discharge end of the discharge end.

The discharge end is equivalent to a three-way structure. The pre-plastic unit is connected with the injection unit through the rotary valve 5, the pre-plastic unit is connected with the mold cavity through the rotary valve 5, and the injection rubber unit is connected with the mold cavity through the rotary valve 5. Through the rotary valve 5, the pre-molding unit and the injection unit are connected to the mold cavity at the same time.

To further optimize the scheme, the pre-plastic unit includes a material storage cylinder 4, one end of the material storage cylinder 4 is fixedly connected with the inlet end of the discharge end, and the injection unit is unidirectionally connected with one end of the material storage cylinder 4 through the rotary valve 5, and the material storage cylinder 4 is provided with a screw pusher assembly, the other end of the storage cylinder 4 is provided with a first servo motor 1, the screw pusher assembly is connected through the first servo motor 1 transmission, the screw pusher assembly, the first servo motor 1 are respectively electrically connected to the control unit.

In a further optimization scheme, the screw pusher assembly includes a screw rod that is slidably connected in the storage cylinder 4 with a coaxial line, a piston part that is connected with one end of the screw rod with a coaxial line, and a load sensor 6 installed at the connection between the screw rod and the piston part. , the piston part is fixedly connected to one end of the screw rod through the load sensor, the screw rod is connected to the first servo motor 1 in transmission, a material storage chamber is formed between the piston part and the rotary valve 5, and the pre-plastic unit communicates with the material storage cavity through the rotary valve 5, The piston part and the load sensor are respectively electrically connected with the control unit.

When it is necessary for the injection unit to inject plasticized material into the pre-plastic unit, the piston part is located at the position of the storage chamber close to the rotary valve 5, and there is not enough plasticized material in the storage chamber; the injection unit passes through the rotary valve 5 and the storage One end of the cylinder 4 is connected, and the control unit controls the start of the first servo motor 1, and the first servo motor 1 drives the screw pusher assembly to run, that is, drives the screw and the piston to run, and the injected plasticized material is gradually filled into the storage chamber ; When the high-pressure and high-speed injection molding mode is required, the control unit sends a control signal, and the pre-plastic unit communicates with the mold cavity through the rotary valve 5, reversely drives the first servo motor 1, and pushes the plasticized material into the mold cavity through the piston.

To further optimize the scheme, the piston part includes an electronic ruler 2, a piston rod 10 and a piston. One end of the piston rod 10 is fixedly connected to one end of the screw rod through the load sensor 6, and the other end of the piston rod 10 is fixedly connected to the coaxial line of the piston. Slidingly connected on the inner wall of the material storage cylinder 4, the material storage chamber is located between the piston and the rotary valve 5, the electronic ruler 2 is installed on the piston rod 10, and the electronic ruler 2 is electrically connected with the control unit.

When the piston is pushing the plasticized material to the mold cavity, the load sensor 6 obtains the pressure value transmitted to the piston rod 10, that is, the extrusion pressure and the extrusion amount can be judged, and the pressure value of the load sensor 6 is consistent with the preset value in the control unit. After the set parameters are tracked and compared, the control unit outputs a control signal to control the first servo motor 1 to ensure the accuracy of the retreat speed of the piston rod 10 during the process of controlling the pre-plastic back pressure, which can improve the homogenization of the melt. Reduce the temperature difference and ensure the plasticizing quality.

During the synchronous movement of the piston rod 10 and the piston, whether it is filling the plasticized material in the storage cylinder 4 or extruding the plasticized material, the stroke of the piston is monitored by the electronic ruler 2, and the monitored value indicates the amount of material in the storage cylinder 4. The amount of melted and plasticized material changes, and the piston moves to drive the electronic ruler 2 to change the stroke position. The detected position signal is sent to the control unit, and the pre-stored program position signal point and time-sensitive position are set for accurate feedback to control the pressure and speed of injection molding and pre-molding. size and end the premolding or injection process.

To further optimize the scheme, the rotary valve 5 includes a valve body 22, the valve body 22 is fixedly connected in the discharge end, and the valve body 22 is provided with three groups of material ports and the material flow channel 20, and the three groups of material ports communicate with the same material flow channel 20 , the three groups of feed ports are respectively connected with the discharge end of the injection glue unit, the material storage chamber, and the discharge end of the discharge end. The valve core 21 is rotatably connected in the material flow channel 20, and the outer surface of the discharge end is fixedly connected with a The second servo motor 23, the spool 21 is driven by the output shaft of the second servo motor 23, a T-shaped channel (not marked in the figure) is opened in the spool 21, and any two groups of material ports are connected through the T-shaped channel or three groups of materials The port is connected through a T-shaped channel, and the second servo motor 23 is electrically connected with the control unit.

The second servo motor 23 drives the spool 21 to rotate, so as to realize the communication between the material storage cylinder 4 and the injection glue unit, make the material storage cylinder 4 communicate with the mold cavity, make the injection glue unit communicate with the mold cavity, and make the material storage cylinder 4 communicate with the mold cavity through the rotary valve 5. Cylinder 4 and the injection glue unit are connected to the mold cavity at the same time, which can realize multiple functional injection molding modes, solve the problem of small injection capacity of the quantitative storage cylinder on the injection equipment, and change the operation mode to properly meet the injection volume of large injection parts Demand, create conditions for injection molding large-scale products.

Further optimization schemes also include:

The ball screw auxiliary driving assembly 11, the ball screw auxiliary driving assembly 11 is coaxially connected with the storage cylinder 4, the ball screw auxiliary driving assembly 11 is threaded on the outside of the screw rod, the ball screw auxiliary driving assembly 11 is connected with the The first servo motor 1 is connected in transmission.

To further optimize the scheme, the injection unit includes an extruder 3, a screw is connected to the extruder 3, one end of the extruder 3 communicates with a group of feed ports, and the other end of the extruder 3 is fixedly connected with another group of first A servo motor 1, the output shaft of the first servo motor 1 is connected with the screw drive.

To further optimize the solution, the control unit includes an industrial controller 9 and a pressure sensor 8, the industrial controller 9 is fixedly connected to the outside of the storage cylinder 4 or the extruder 3, and the sensing end of the pressure sensor 8 is installed in the outlet of the discharge end.

The pressure sensor 8 monitors the pressure of the molten plasticized material in the mold cavity (cavity) in real time during the injection molding process, and transmits the data signal to the industrial controller 9 according to the real-time detected data signal. After comparing with the preset parameters for reference, the industrial controller 9 outputs The driving signal is used to control the speed, direction and torque of the servo motors with their respective functions, so as to judge and choose the injection molding operation mode. The pressure sensor 8 can ensure the repeatability of the weight and position of the injection molded product, thereby ensuring the quality control precision of the product during the injection process.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone skilled in the art can easily think of changes or substitutions within the technical scope disclosed in the present invention. Should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1. The utility model provides a full electronic crowded notes formula conversion injection molding device, its characterized in that includes the preforming unit and inserts the gluey unit, the overage end of preforming unit with insert and install rotary valve (5) between the discharge end of gluey unit, the preforming unit pass through rotary valve (5) with insert and glue the unit in one-way intercommunication, the preforming unit with insert and glue the unit and extrude respectively or extrude simultaneously through rotary valve (5), the extrusion pressure of preforming unit is greater than the extrusion pressure of injecting and gluing the unit, the preforming unit with insert and glue the unit electric connection has control unit, the exit end of rotary valve (5) passes through control unit monitoring pressure, rotary valve (5) with control unit electric connection.

2. The all-electric injection conversion injection molding apparatus of claim 1, further comprising:

the discharge end, the rotary valve (5) is installed on the discharge end, the material passing end of the pre-plastic unit, the discharge end of the injection glue unit are respectively communicated with the inlet end of the discharge end through the rotary valve (5), and the pressure monitoring end of the control unit is installed close to the outlet end of the discharge end.

3. The all-electric extrusion-type conversion injection molding device according to claim 2, wherein: the pre-molding unit comprises a storage cylinder (4), one end of the storage cylinder (4) is fixedly communicated with the inlet end of the discharge end, the injection glue unit is communicated with one end of the storage cylinder (4) in a unidirectional manner through a rotary valve (5), a screw pushing assembly is arranged in the storage cylinder (4), a first servo motor (1) is arranged at the other end of the storage cylinder (4), the screw pushing assembly is in transmission connection with the first servo motor (1), and the screw pushing assembly and the first servo motor (1) are respectively electrically connected with the control unit.

4. A fully electric injection conversion injection molding apparatus as claimed in claim 3, wherein: the screw pushing assembly comprises a screw rod which is coaxially and slidably connected in the storage cylinder (4), a piston part which is coaxially connected with one end of the screw rod, and a load sensor (6) which is arranged at the joint of the screw rod and the piston part, wherein the piston part is fixedly connected with one end of the screw rod through the load sensor, the screw rod is in transmission connection with the first servo motor (1), a storage cavity is formed between the piston part and the rotary valve (5), the pre-molding unit is communicated with the storage cavity through the rotary valve (5), and the piston part and the load sensor are respectively and electrically connected with the control unit.

5. The all-electric injection-molding conversion injection molding apparatus according to claim 4, wherein: the piston part comprises an electronic ruler (2), a piston rod (10) and a piston, one end of the piston rod (10) is fixedly connected with one end of the screw rod through the load sensor (6), the other end of the piston rod (10) is fixedly connected with the piston in a coaxial line, the piston is axially and slidably connected to the inner wall of the storage cylinder (4), the storage cavity is located between the piston and the rotary valve (5), the electronic ruler (2) is mounted on the piston rod (10), and the electronic ruler (2) is electrically connected with the control unit.

6. The all-electric injection-molding conversion injection molding apparatus according to claim 5, wherein: the rotary valve (5) comprises a valve body (22), wherein the valve body (22) is fixedly connected in a discharge end, three groups of material openings and a material flow channel (20) are formed in the valve body (22), the three groups of material openings are communicated with the same material flow channel (20), the three groups of material openings are respectively communicated with the discharge end of the injection glue unit, a material storage cavity and the discharge end, a valve core (21) is rotationally connected in the material flow channel (20), a second servo motor (23) is fixedly connected to the outer surface of the discharge end, the valve core (21) is driven by an output shaft of the second servo motor (23), any two groups of material openings are communicated with the valve core (21) or three groups of material openings are communicated with the valve core (21), and the second servo motor (23) is electrically connected with the control unit.

7. The all-electric injection conversion injection molding apparatus of claim 4, further comprising:

the ball screw pair driving assembly (11), ball screw pair driving assembly (11) with storage jar (4) coaxial line rotation is connected, ball screw pair driving assembly (11) thread bush is established the outside of lead screw, ball screw pair driving assembly (11) with first servo motor (1) transmission is connected.

8. The all-electric injection-molding conversion injection molding apparatus according to claim 6, wherein: the injection glue unit comprises an extruder (3), a screw is rotationally connected to the extruder (3), one end of the extruder (3) is communicated with one group of material inlets, the other end of the extruder (3) is fixedly connected with the other group of first servo motors (1), and an output shaft of each first servo motor (1) is in transmission connection with the screw.

9. The all-electric injection-molding conversion injection molding apparatus according to claim 8, wherein: the control unit comprises an industrial controller (9) and a pressure sensor (8), wherein the industrial controller (9) is fixedly connected with the outer side of the storage cylinder (4) or the extruder (3), and the induction end of the pressure sensor (8) is arranged in the outlet end of the discharge end.