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Full-automatic vacuum molding control system and method

A technology of vacuum injection molding and control system, which is applied in the field of automatic vacuum injection molding control system and method, and can solve problems such as difficult product quality assurance, low production efficiency, and adjustment of process parameters.

Inactive Publication Date: 2011-04-13
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For manual and electric control vacuum injection molding equipment, the detection of vacuum degree and the judgment of defoaming effect are all subjective judgments through human visual inspection, which is easy to cause problems such as low production efficiency and misoperation, and the influence of human factors is not conducive to product quality. stability control
However, the automatic control of the memory mode has defects such as poor production flexibility and insufficient anti-interference ability, that is, a set of parameters can only be adapted to one production condition, and it is impossible to realize automatic control according to different casting materials, molded parts geometric characteristics and quality standards. Adjust process parameters
In short, the existing vacuum injection molding control system is highly dependent on the operator's experience and proficiency, and the production efficiency is low and the production flexibility is poor, which makes it difficult to guarantee the quality of the product

Method used

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  • Full-automatic vacuum molding control system and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0094] join figure 1 , the automatic vacuum injection control system is composed of a controller module, a detection module and an execution module, the controller module is connected to the detection module and the execution module, and it is characterized in that: the controller module consists of a The main controller is connected with a slave controller; the detection module is composed of a CCD high-speed digital camera, a digital pressure sensor and four limit switches; the execution module is composed of a vacuum motor connected with a vacuum pump, a stirring motor connected A stirring rod, two pouring motors are respectively connected with a curing agent cup and a mixing cup, and an electromagnetic valve; in the controller module, the main controller is a computer, and the slave controller is a programmable logic controller, which can The programming logic controller is connected to the computer through the SC-09 programming cable; the limit switch in the detection mod...

Embodiment 2

[0096] This embodiment is basically the same as Embodiment 1, and the special features are as follows:

[0097] This embodiment takes the preparation of a thin-walled transparent plastic part (20g) with a complex cavity as an example, and introduces the specific implementation process of the automatic vacuum injection molding control system in detail with reference to the accompanying drawings.

[0098] 1. Connect the camera to the computer via a USB data cable, and turn on the dedicated light source controller. Adjust the shooting angle of the camera so that the liquid level of the mixing cup is fully displayed in the monitoring window, and adjust the focal length of the lens according to the height of the liquid level of the mixing cup to make the image of the liquid surface clearest. Considering that the liquid surface is in motion, the maximum linear velocity is 0.18m / s. Set the maximum exposure time of the camera to 0.0001s. Due to the dark light in the vacuum chamber, t...

Embodiment 3

[0112] In this fully automatic vacuum injection molding control method, the control system described in Embodiment 1 is used for vacuum injection molding, and the specific control steps are as follows:

[0113] (1) When the vacuum pump switch X0 is pressed, the vacuum motor (Y0) is started to drive the vacuum pump to start pumping;

[0114] (2) The digital pressure sensor detects the pressure of the vacuum chamber in real time and transmits it to the pressure variable in the configuration through the serial port communication. When the pressure value reaches the set value, the vacuum stop condition associated with the pressure variable is satisfied (that is, X1 is closed). Start the stirring motor (Y1) at the right time to drive the stirring rod to mix and stir the materials in the mixing cup (B cup), and at the same time, the time interval timer (T0) for stirring and pouring the curing agent starts timing;

[0115] (3) When the time interval between stirring and curing agent ...

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Abstract

The invention relates to a full-automatic vacuum molding control system and a method. The system comprises a detection module, a control module and an execution module, wherein the control module comprises a computer as a main controller and a programmable logic controller as a secondary controller, the detection module comprises a CCD (Charge-Coupled Device) high-speed digital camera, a digital pressure sensor and a limit switch, the execution module comprises a vacuum pump connected with a vacuumizing motor, a stirring rod connected with a stirring motor, and a firming agent material cup and a mixed material cup connected with a tilted motor as well as an electromagnetic valve for air intake. The control method realizes visual, automatic and intelligent control of the vacuum molding process. The invention can greatly save the labor resource cost and improve the molding working efficiency and the product quality.

Description

technical field [0001] The present invention relates to a new type of automatic vacuum casting control system and method. The system adopts a two-level distributed structure composed of a computer and a programmable logic controller, and is especially suitable for automatic detection of vacuum degree and pouring material bubbles, Monitoring and control, providing different process parameters according to different casting materials and customer needs, and completing the automatic control of the vacuum casting process. Background technique [0002] Rapid prototyping and rapid tooling technology enables enterprises to shorten the product development and manufacturing cycle, thereby realizing the rapid response ability of enterprises to deal with market changes and improving the market competitiveness of products. As one of the typical indirect rapid mold technologies, the vacuum injection molding technology can be injected in a vacuum state, so as to better solve the problem o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C39/44
Inventor 张海光刘媛媛黄杰胡庆夕王超陈维灯
Owner SHANGHAI UNIV
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