Control system for Interlayer gas and inner gas of bellows forming machine

Abstract

The invention discloses a control system for interlayer gas and inner gas of a bellows forming machine, and belongs to the technical field of plastic processing, which can solve the technical problemthat the control operation of the air pressure in an interlayer cavity and the inner cavity is inconvenient, the control precision is difficult to master, and numerical values are not recordable in the conventional bellows production line. The control system includes a touch screen, a PLC, an analog quantity output module, and proportional valves; an operator inputs process parameter information through the touch screen; a data processor can read the process parameter information of the touch screen and sends the process parameter information to the analog quantity output module through a digital signal; the analog quantity output module can convert the digital signal into a corresponding analog quantity signal, and sends the analog quantity signal to each proportional valve. The control system can adjust the intake air flow of each cavity or closes proportional valves, and then control the air pressure in each cavity; the data of each adjustment parameter is recordable; and the control system is convenient to operate and maintain, the system stability is better, and the control precision is higher.

Description

technical field [0001] The invention relates to the technical field of plastic processing, in particular to a system for realizing automatic control of interlayer gas and inner layer gas of an extrusion die on a bellows forming machine. Background technique [0002] The outer surface of the plastic bellows is usually a regular corrugated surface, and its inner surface is a smooth curved surface. In the prior art, the corrugated pipe forming machine extrudes the plastic corrugated pipe through the extrusion die on it, and there are two forming inner cavities in the extrusion die, one is a sandwich cavity for extruding the outer surface of the corrugation, and the other is for extruding the corrugated outer surface. Extrude the inner layer cavity with a smooth inner surface, the staff usually manually adjust the control valve to adjust the air pressure in the two layer cavity, but this adjustment method has the following disadvantages: 1. There are many control valves for manu...

AI Technical Summary

Problems solved by technology

In the prior art, the corrugated pipe forming machine extrudes the plastic corrugated pipe through the extrusion die on it, and there are two forming inner cavities in the extrusion die, one is a sandwich cavity for extruding the outer surface of the corrugation, and the other is for extruding the corrugated outer surface. Extrude the inner layer cavity with a smooth inner surface, the staff usually manually adjust the control valve to adjust the air pressure in the two layer cavity, but this adjustment method has the following disadvantages: 1. There are many control valves for manual adjustment, which is inconvenient to operate; 2. Manually adjust the control valve, and the accuracy is not easy to grasp; 3. Due to the manufacture of bellows of different specifications, the air pressure of each layer cavity that the staff needs to adjust is different. Every time a bellows of different specifications is manufactured, the air pressure needs to be readjusted Parameters, there is no record of data, the staff needs to operate repeatedly, and the adjustment parameters of the bellows of the same specification are difficult to keep consistent. In this way, it is difficult to improve the quality of the product and the production efficiency is low

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