Injection molding machine injection hydraulic loop achieving high-response injection and injection molding control method of injection molding machine injection hydraulic loop

A technology of hydraulic circuit and control method, which is applied in the field of injection hydraulic circuit of injection molding machine and its injection molding control. It can solve the problems of inability to adjust flow, pressure, poor injection repeatability, and decreased production efficiency, so as to improve production efficiency and improve injection molding. The effect of repeatability and simple structure

CN107498813APending Publication Date: 2017-12-22CHENGDU LIANYU PRECISION MACHINERY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2017-12-22

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Abstract

The invention discloses an injection molding machine injection hydraulic loop achieving high-response injection and an injection molding control method of the injection molding machine injection hydraulic loop. The injection molding machine injection hydraulic loop comprises an injection oil cylinder (3) and a main oil way connected with the injection oil cylinder (3), and further comprises a control oil way. The control oil way is composed of a second solenoid valve (4), a second overflow valve (5) and a cartridge valve (6). The safe pressure of a hydraulic pump system (1) is P1, the work pressure of the second solenoid valve (4) is P2, and P1 is larger than P2. The injection molding machine injection hydraulic loop has the beneficial effects that the control oil way is additionally arranged at an oil inlet (pressure oil inlet) of an injection solenoid directional valve to replace a complex energy accumulator in an existing oil way; through cooperation action of the overflow valve and the cartridge valve, system pressure oil of an injection molding machine before injection keeps constant pressure and flow all the time, and the injection molding machine can obtain the high injection molding response during injection molding; and on the basis of reducing equipment energy consumption, the injection repeated accuracy is improved, and the production efficiency of the injection molding machine is improved.
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Description

Technical field

[0001] The invention relates to an injection hydraulic circuit of an injection molding machine that realizes high-response injection and an injection control method thereof, and belongs to the technical field of mold injection molding machine oil circuit systems. Background technique

[0002] The injection response of the injection molding machine refers to the time it takes for the injection speed to accelerate from zero to the maximum during injection. The shorter the time, the better the performance. Especially for the injection molding of thin-walled plastic products, a high injection speed is required. The injection response is a very critical performance index. Generally, a faster injection response makes injection molding easier and requires less clamping force. The traditional injection circuit has no control branch and cannot realize the acceleration before injection. It can only accelerate from zero to the set value after the injection action starts, whi...

Examples

Embodiment Construction

[0023] The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0024] Such as figure 1 As shown, an injection hydraulic circuit of an injection molding machine for realizing high-response injection includes an injection cylinder 3 and a main oil circuit connected to the injection cylinder 3. The main oil circuit is provided with a hydraulic pump system 1 and a first electromagnetic reversing valve 2, so The injection hydraulic circuit of the injection molding machine described above also includes a control oil circuit, which is composed of a second solenoid valve 4, a second relief valve 5 and a cartridge valve 6. The control oil port of the cartridge valve 6 is connected with the oil inlet, The oil inlet of the installation valve 6 is connected to the oil inlet of the first solenoid directional valve 2 on the main oil...