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A common problem of rapid sample silicone compound die

by:Bofeng     2020-11-06
1. Rolling over less

main reason is that in the process of making mould add too much silicone oil, silicone oil destroyed the molecular weight of the silica gel, so the mold can appear the phenomenon such as fewer rolling over not durable.

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if do small decorative pattern more complex products, with high hardness of silica gel to open mold, can appear the phenomenon of fewer rolling over, because the silicone hard time will be very fragile, easily broken.

on the contrary, if do large products with small silica gel for mold hardness, the results also is not satisfied. Because the silicone is too soft, its tensile and tear strength will reduce, will make mold deformation, so it will reduce number of rolling over.

mold rubber itself is very good quality, silica gel is no good or bad, only suitable for and not suitable for. We should use suitable for the size of the product hardness silicone to make the mould won't appear this kind of situation.

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according to the operation mode, if the perfusion model ( BaoMo) Can choose hardness silicone for 20 or 40 degrees, in particular is:

20 degrees hardness characteristics of mold silicone: do small handicraft, viscosity, good fluidity, good operation, easy to bubble, pull tear strength is good, easy to perfusion.

40 degrees mold hardness silicone features: large products, viscosity, good fluidity, good operation, easy to bubble, pull tear strength is good, easy to perfusion.

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2。 Die appears to burn in the

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because of unsaturated resins and resin products react with peroxide curing agent after will produce a lot of heat, general resin curing time for 3 minutes, so after 3 minutes to release as soon as possible, to prevent the silicone mold burning phenomenon.

3。 Tension difference phenomenon

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in the process of making mould, in order to reduce the viscosity of silica gel, the silica gel is easy to operation and a large amount of added silicone oil in the silica gel, this will make silicone is very soft, not resistant, pull, tear strength is reduced, the phenomenon of tension variation, resulting in the mould is not durable, service life is short, the phenomenon such as fewer rolling over.

mold silicone itself is not taking oil, appeared to take oil is because of the complex silicone oil is added in the operation process, Silicone oil and white mineral oil complex ligand) Because white mineral oil is oil chemical products, not silicone oil

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4. Mold not resistant to acid and alkali, not resistant to ageing

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in the process of making silicone mold, had better do not add any silicone oil, if necessary, can add appropriately 5% ~ 10% silicone oil. Because the amount of silicone oil to add too much can destroy the molecular weight of silica gel, so the mold to produce not resistant to acid and alkali, not resistant to ageing phenomenon.

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5。 Mold surface

traces, the phenomenon such as stripe, not smooth

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appear this kind of phenomenon is to copy the prototype without grinding or polishing.

because in fact the model or the product itself is not enough smooth or perfect, so to copy products or model if without grinding or polishing, again good made of silicone mold will not beautiful, not smooth enough. Another is that playing release agent, not besmear brushs homogeneous can cause mould is not smooth.

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