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The reasons for the poor size of silicone products and why the size of silicone products will be poor

Release time:

2019-05-25 12:30

Source:

Silicone ProductsReasons for poor size and why silicone products will appear poor size
 
Silicone manufacturing production, sometimes there will be wrong size, not big is small, far from meeting the requirements of each household, not only affects the efficiency of the factory also caused an impact, so what is the reason for the size of silicone products and the original difference is so big?

When the 1. mold temperature molding temperature is too high, it will accelerate the vulcanization of the rubber compound of the silicone product, resulting in the decrease of the fluidity of the rubber compound of the silicone product in the molding mold, resulting in the small size and thick thickness of the silicone product. Note: When the molding temperature is too low, the size of the silicone product after molding is too large and the thickness is too thin.
 
2. pressure caused by silicone keys load bad, resulting in poor size of silicone products.

Note: 1. When the molding pressure is too high, the size of the silicone product is too long.
2. When the pressure is too low, the size of the silicone product is too small and the thickness is too thick.
 
3. molding compound weight

Too much rubber material is discharged from silicon, resulting in bubbles (air wrapping) of silica gel products and too high load of silica gel keys, resulting in too large size of silica gel products. Note: The weight of discharged rubber material is too light, resulting in too small size of silica gel products after molding.
Summary: The poor size of silicone products belongs to poor functionality. Different from the poor appearance of silicone products, once the size of silicone products is abnormal, they will face scrap treatment, and there is almost no possibility of repair. Therefore, in the production process of silicone products, special attention should be paid to the production of abnormal size control. Only to find the reason, the problem will naturally be solved.
 
Why does the production of silicone products have poor size?
 
Too much rubber material is discharged from silicon, resulting in bubbles (air wrapping) of silica gel products and too high load of silica gel keys, resulting in too large size of silica gel products. Note: The weight of discharged rubber material is too light, resulting in too small size of silica gel products after molding. Decrypt the reason why there is an error between the molding size of silicone products and the expected size. Some situations will always occur during the production and molding of silicone products. For example, sometimes the molding size of silicone products is larger or smaller than the size on the design drawing. What is the reason?
You should know that if the size of silicone products after molding is different from that of design and production, the produced products can only be treated as defective products for scrap. Therefore, silicone products manufacturers will pay more attention to this aspect during production. The following Wei Shun Xiaobian introduces the causes and solutions of errors?
 
First of all, the temperature of the silicone product molding mold is too low, and the fluidity of the raw materials is relatively poor, resulting in errors in the molding size and expectations of the product! Therefore, silicone products molding should increase the temperature of the mold, to know the higher the temperature of the mold, then its silicone raw material because of the temperature of the reason can be very good in accordance with the molding mold molding, the fluidity of the raw material will be close to the mold activities, there will be no error.
 
Secondly, we can give a force to the silicone raw material during molding, and through a moderate force, the silicone raw material can be compressed to a fixed size. However, the molding pressure should be reasonably controlled, otherwise the thickness will become thinner and the size will become larger if the pressure is too large, and vice versa. In addition, sometimes it may be the problem of the design of the mold itself. The design of the mold is not rigorous and unqualified, so no matter how to adjust the size in production, some errors will be found.
Therefore, when opening the mold, we must pay attention to the rigor of the mold and the scale of the product without any error. There is also silicone raw materials, if the production of silicone raw materials into more than the volume or weight required for the production of products, it will be easy to appear silicone products after molding size and expected size error.
 
How do manufacturers ensure the size of silicone rubber products after molding; What is the cause of the dimensional instability of silicone rubber seals? Is there any good way to control the size of silicone rubber seals? The following Mingzhen explains how to control the size of silicone rubber seals: weight of molding compound: if the weight of rubber is discharged too much, the size of silicone rubber seals will be too large; If the weight of the rubber material is discharged too lightly, the size of the silicone rubber seal will be too small after molding.
2. Mold temperature: When the molding temperature is too high, it will accelerate the vulcanization of the silicone rubber seal compound, resulting in a decrease in the flow performance of the silicone rubber seal compound in the molding mold, resulting in a small size and thick thickness of the silicone rubber seal. On the other hand, if the molding temperature is too low, the size of the silicone rubber seal after molding is too large and the thickness is too thin.
 
3. Vulcanization pressure: when the silicone rubber seal molding vulcanization pressure is too low, it will lead to silicone rubber seal rubber shortage, high load, thick base thickness, short length and other defects, while the silicone rubber seal molding vulcanization pressure is too high, it will cause silicone products low load, thin base thickness, long length and other defects.
 
The solution to the method of controlling the size of silicone rubber seals is to strictly follow the production conditions confirmed by the samples in the molding production process. The mold temperature, pressure, discharge, hardness, time and other technical parameters cannot be changed at will, which requires perfect operation guidance process and skilled operation staff. The section, inner diameter and outer diameter of the silicone rubber seal can be measured according to the specific requirements. General detection tools are vernier caliper, ruler or tape measure, projection microscope and other optical instruments to measure.

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