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Plastic de-molding force test mold and test method thereof

A technology for testing mold and demoulding force, applied in the direction of measuring force, measuring devices, instruments, etc., can solve the problems of damage to the surface condition of parts, surface scratches, material adhesion residues, etc., to save the cycle and change of comprehensive inspection The effect of angle fast and convenient, comprehensive and accurate data

Active Publication Date: 2017-10-13
NINGBO ZHETIE DAPHOON CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the demoulding performance is poor, problems such as part deformation, thimble white marks, and dimensional deviation will occur. If the demoulding performance is not good, it will easily cause the material to adhere to the metal cylinder wall, and then coke and decompose into impurities. Cause surface particle pitting, serious cause surface scratches, ripples, seriously damage the surface condition of the part. Concerning the above-mentioned problems, the design of the demoulding mechanism in the mold is reasonable, which directly affects the surface quality and physical properties of the product.
It is necessary to monitor the pressure inside the mold in real time during the stages of injection molding, pressure holding and cooling, and ejection, so as to evaluate the release performance of plastic particles. However, none of the current existing technologies can fully and comprehensively monitor plastic particles The test mold for the plastic particles has caused certain difficulties in the evaluation of the mold release properties of plastic particles.

Method used

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  • Plastic de-molding force test mold and test method thereof
  • Plastic de-molding force test mold and test method thereof
  • Plastic de-molding force test mold and test method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Please refer to the attached figure 1 , a schematic diagram of a plastic demoulding force test mold, which includes an injection molding machine 5, a fixed mold 2, a movable mold 1 and an ejector device 3 in turn, wherein the fixed mold 2 is shaped like a cuboid and includes two cuboid cavities 21; The movable mold 1 is provided with a main channel hole, and the main channel hole flows into the two cavities 21 respectively through two branch channels. In the cavity 21 formed between the molds 1. The raw material can be at least one of polyethylene, polypropylene, polycarbonate, ABS, PS, and PA. Of course, in order to test the performance of different demoulding forces after adding different raw materials, it can also be a variety of combinations.

[0031] Please refer to the attached figure 2 , 3 A pressure sensor 4 is arranged at the center of the four side walls and the bottom of the cavity 21 of the fixed mold 2, and the top of the pressure sensor 4 is on the sam...

Embodiment 2

[0038] Please refer to the attached Figure 4 , on the basis of Example 1, the difference from Example 1 is that there is a cube-shaped cavity 21 in the fixed mold 2, which can collect four sets of data for comparison after injection molding again. For analysis, the more groups collected, the smaller the error rate. The ejector device 3 includes ejector pins 32 and ejector plates 31, and each cavity 21 has four ejector pins 32, and the top of the ejector pins 32 is also set There is a pressure sensor 4, so that the data of the initial demoulding force on the thimble 32 can be obtained, and errors can be further reduced.

Embodiment 3

[0040] On the basis of embodiment 1, in the process of processing unit, before calculating the average value, the collected Ft1a, Ft1b, Ft1c, Ft1d, Ft1e... Ft1n and Ft2a, Ft2b, Ft2c, Ft2d, Ft2e.. .. Ft2n removes the maximum value and the minimum value from the two sets of data, thereby reducing the error value.

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Abstract

The invention discloses a plastic de-molding force test mold and a test method thereof. The problem in the prior art that it is difficult to evaluate the de-molding performance of plastic particles as there is no test mold capable of testing plastic particles in an integrated and comprehensive manner is solved. The key points of the technical scheme are as follows: an ejector device includes an ejector plate and an ejector pin; the bottom plate of a fixed mold has an ejector pin slot for the ejector pin to pass through; two opposite side plates of the fixed mold can pivot relative to the bottom plate to turn outward 0.2-5 degrees so as to form corresponding de-molding angles, and can be fixed by a corresponding fixing device; pressure sensors are respectively arranged on the inner bottom plate and the sidewalls of the fixed mold; the test mold further includes a pressure terminal; and the detection signals of the pressure sensors are processed through a processing unit. Two opposite side plates of the fixed mold can pivot outward to realize different de-molding slopes. The angle can be changed quickly and conveniently. The period of comprehensive detection through de-molding angle adjustment is shortened greatly. Comprehensive and accurate data can be obtained.

Description

technical field [0001] The invention relates to the field of moulds, more specifically, to a testing mold for testing the demoulding force of plastics and a method for testing the demoulding force of plastics. Background technique [0002] With the rapid development of the mold industry, various molds are widely used in the mass manufacturing process of industrial products. Generally, injection molded products must be molded and processed through corresponding molds. After an injection molded product is formed and cured, it is taken out from the mold cavity or core, commonly known as demoulding. Poor demoulding is the quality defect of injection molded products and affects production. One of the important reasons for efficiency. If the demoulding performance is poor, problems such as part deformation, thimble white marks, and dimensional deviation will occur. If the demoulding performance is not good, it will easily cause the material to adhere to the metal cylinder wall, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/00
CPCG01L1/00
Inventor 邱琪浩徐小武周志峰周浩施懿军傅建永
Owner NINGBO ZHETIE DAPHOON CHEM
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