An electrical-hydraulic conversion control system for an injection molding machine

Abstract

The present invention provides an electric and hydraulic conversion control system for an injection molding machine, which relates to the technical field of electric and hydraulic control of injection molding machines. The system comprises a control signal and drive conversion circuit and an external hydraulic system, wherein the control signal and drive conversion circuit comprises a needle valve control relay, a 24V control signal terminal block, a contactor KM, and an external hydraulic system; wherein the needle valve control relay is connected to the 24V control signal terminal block, and a signal is connected from the 24V control signal terminal block 2 to the contactor KM; the contactor KM utilizes a 24V control power supply to synchronously control a 220V power supply, drive the external hydraulic system, control a needle valve group to perform injection, and associate the mold opening and closing actions of the injection molding machine with the external hydraulic control, thereby providing hydraulic drive for the needle valve group.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical and hydraulic control of injection molding machines, and in particular to a control technology for a hydraulic conversion system of an injection molding machine. Background Art

[0002] An injection molding machine is the primary molding equipment used to create various plastic products using plastic molds during injection molding. Also known as an injection molding machine or injection machine, it is the primary molding equipment used to convert thermoplastics or thermosetting plastics into various shapes using plastic molding molds. It typically consists of an injection system, mold clamping system, hydraulic transmission system, electrical control system, lubrication system, heating and cooling system, and safety monitoring system.

[0003] With the demand for automobile parts production, existing injection molding machines need to be frequently replaced with different molds. Sometimes, the existing hydraulic control system of the existing injection molding machine does not match the hydraulic control requirements of the replaced mold.

[0004] This conversion control system is because the existing hydraulic control system of the injection molding machine does not match the hydraulic control requirements of the replaced mold. The voltage level of the external hydraulic station valve group is 220V, and the voltage level of the control output terminal of the on-site injection molding machine is 24V. The on-site injection molding machine cannot directly drive the injection mold hydraulic station to work; directly connecting the injection mold hydraulic station to the 220V power supply cannot achieve synchronous control of the injection mold hydraulic system and the on-site injection molding machine, making it impossible to link the injection of the needle valve with the mold closing and opening of the injection molding machine, affecting the quality of the injection molded workpiece and making the mold unusable under the existing conditions. Therefore, it is necessary to add an independent hydraulic control system to the injection molding machine, and at the same time, draw a control signal from the injection molding machine to control the 220V power supply to drive the external hydraulic system to work to meet production needs. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects of the prior art and provide an electric-hydraulic conversion control system for an injection molding machine. Through the power conversion control system, the injection molding machine can be matched with various types of mold hydraulic control systems, and the injection control requirements of molds of different specifications can also be met.

[0006] The purpose of the present invention is achieved by adopting the following technical solutions:

[0007] An electric-hydraulic conversion control system for an injection molding machine includes a needle valve control relay, a 24V control signal terminal block, a contactor KM, and an external hydraulic system; the needle valve control relay is connected to the 24V control signal terminal block, the 24V control signal terminal block is connected to the contactor KM, and the contactor KM is connected to a 220V power supply and an external hydraulic system.

[0008] Furthermore, the contactor KM is a 24V-controlled 220V contactor.

[0009] Furthermore, the external hydraulic system includes an external hydraulic pump station, a needle valve group, a needle valve controller, and a nozzle; the external hydraulic pump station is connected to the needle valve group.

[0010] Furthermore, the needle valve controller controls the needle valve assembly to perform injection through the nozzle.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This invention uses a contactor KM to synchronously control a 220V power supply with a 24V control power supply, driving an external hydraulic system and controlling a needle valve assembly for injection. This system links the mold opening and closing actions of the injection molding machine to the external hydraulic control, providing hydraulic drive for the needle valve assembly. The addition of a needle valve controller allows for flexible control of the needle valve assembly's actions, meeting the diverse injection requirements of different molds and ultimately achieving mold-to-equipment matching. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the electrical-hydraulic conversion control system of the injection molding machine of the present invention.

[0014] Figure 2 Schematic diagram of the control flow of the injection molding machine of the present invention.

[0015] Explanation of the reference numerals: 1-needle valve control relay; 2-24V control signal terminal block; 3-contactor KM; 4-external hydraulic system; 5-external hydraulic pump station; 6-needle valve group; 7-needle valve controller; 8-injection molding machine nozzle. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0017] The following combination Figure 1 The present invention describes an electric-hydraulic conversion control system for an injection molding machine.

[0018] An electric-hydraulic conversion control system for an injection molding machine includes a control signal and drive conversion circuit and an external hydraulic system, wherein the control signal and drive conversion circuit includes a needle valve control relay 1, a 24V control signal terminal block 2, a contactor KM3, and an external hydraulic system 4; wherein the needle valve control relay 1 is connected to the 24V control signal terminal block 2, and a signal is drawn from the 24V control signal terminal block 2 to the contactor KM3.

[0019] The preferred contactor KM3 is a 24V control 220V contactor.

[0020] The external hydraulic system 4 includes an external hydraulic pump station 5 , a needle valve group 6 , a needle valve controller 7 , and an injection molding machine nozzle 8 ; the external hydraulic pump station 5 is connected to the needle valve group 6 .

[0021] The external hydraulic pump station 5 is connected to the needle valve group 6, the needle valve group 6 is connected to the injection molding machine nozzle 8, and the needle valve controller 7 is connected to the injection molding machine nozzle 8;

[0022] It is preferred to lead out the 24V control power supply of the injection molding machine from the 24V control signal terminal block 2, and then through the contactor KM3, use the 24V control power supply of the injection molding machine to control the external 220V power supply to achieve synchronization, drive the external hydraulic system valve group, and provide hydraulic power for the mold injection control needle valve group.

[0023] In order to meet the different injection requirements of different molds, it is preferred to install a needle valve selection controller 7. The needle valve group 6 sets the corresponding needle valve according to the different injection mold models. The needle valve that needs to be opened can be selected according to the injection requirements of different molds. After the injection molding machine is closed, the needle valve of the needle valve group 6 receives the opening signal of the needle valve controller 7, the selected needle valve opens, and the injection starts. After the injection is completed, the needle valve closes, thereby achieving the purpose of matching the mold and the equipment for production.

[0024] Combine Figure 2 The working principle of the electric-hydraulic conversion control system of the injection molding machine is explained. After the injection molding machine is closed, the needle valve control relay 1 outputs a signal to the 24V signal terminal block 2, and the signal is connected from the 24V signal terminal block 2 to the 24V control 220V contactor 3. After receiving the signal, the 24V control 220V contactor 3 is connected to the 220V power supply and synchronously outputs it to the external hydraulic system 4, thereby driving the needle valve group 6 of the external hydraulic system 4 to operate and provide hydraulic power for the needle valve group 6. At the same time, the needle valve controller 7 outputs a signal according to a preset program, controlling the needle valve group to open according to the preset number, sequence, and time of the needle valves, and injecting through the injection molding machine nozzle 8. After completion, the external hydraulic pump station and valve group are closed, the needle valve group is closed, the mold is opened, and the robot takes the part, completing a production cycle.

[0025] Contactor KM3 is used to synchronously control the 220V power supply with the 24V control power supply to drive the external hydraulic system and control the needle valve group for injection, so that the mold opening and closing actions of the injection molding machine are associated with the external hydraulic control and provide hydraulic drive for the needle valve group.

[0026] The above embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. An electric-hydraulic conversion control system for an injection molding machine, comprising a control signal and drive conversion circuit and an external hydraulic system, characterized in that: The control signal and drive conversion circuit comprises a needle valve control relay (1), a 24V control signal terminal block (2), a contactor KM (3), and an external hydraulic system (4); wherein the needle valve control relay (1) is connected to the 24V control signal terminal block (2), and a signal is connected from the 24V control signal terminal block (2) to the contactor KM (3); The contactor KM (3) is a 24V control 220V contactor; The external hydraulic system (4) includes an external hydraulic pump station (5), a needle valve group (6), a needle valve controller (7), and an injection molding machine nozzle (8); the external hydraulic pump station (5) is connected to the needle valve group (6); The needle valve controller (7) controls the needle valve group (6) to perform injection through the injection molding machine nozzle (8).

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