In recent years, the silicone rubber molding method, namely liquid silicone injection molding obtained widespread popularization and promotion.
Now, the liquid silicone injection molding method for automatic forming can be a short time and with the advantages of plastic composite forming, are popular with the personage inside course of study. Next to the advantages of silicone rubber molding and applied to the molding method of materials, do a simple introduction.
The advantages of silicone rubber molding
1. Automatic molding: no flash, no flow, automatic demoulding about the full automatic molding process, people from many aspects, such as injection machines, mold, and materials were studied. It’s not just on the process operation can save manpower, and because it won’t create useless curing, so the material cost reduction, from the perspective of both environmental protection and the method also popular attention. For automotive skeleton oil seal the forming, micro products, such as its shape cycle (from injection next injection) within the 10 s, so also can arrive within a very short time to complete.
2. Composite forming: clip insert molding, binary shape because the crosslinking reaction is a bonus in the form of curing, so forming at low temperatures. Because of the crosslinking reaction no residue of peroxide decomposition by-product was generated, so in principle without secondary sulfide. So can be overall molding, and resin by coating the bottom enchase molding on coating material, make the sealing parts and the skeleton as a whole the binary shape have also started to spread.
Molded Silicone Products
Liquid silicone with outstanding properties (high and low-temperature resistance, electrical insulation, flame retardant, etc.). Due to these properties, shape based on the fully automatic forming of environmental protection, and the whole of metals, organic resin molding, is possible.
Together with transparent material itself is shading, so its application scope involves many fields, such as (computers, mobile phones, etc), bottle teats, rubber rollers (copiers, printers, etc.), pipe joint seals, oil seals, etc all kinds of auto parts, CPAP Mask, television tube anode caps, diving supplies three, silicone rubber molding material (without glue edge/port automatic molding materials)In terms of silicone rubber molding, there is a call of rubber edge, runner molding methods become available.
It is not uselessly cured without secondary processing of forming method, which is a kind of no note material, port mouth, does not produce waste rubber molding method. In order to implement the molding method, the structure of the model and parting surface roughness, and the calculating of the injection machine, the discharge must meet the precision requirement, even in the material must also be difficult to generate waste rubber edge materials, rubber into the mold cavity after full of the cavity, because the rubber is overmuch, or due to factors such as the thermal expansion of silicone rubber, rubber into the parting surface, after curing has become a waste rubber edge. If the parting surface design is more narrow, it will be difficult to generate waste rubber edge, but at the same time, the air is not easy to go to, then become a finished product containing air bubbles.
in conclusion
No waste rubber edge forming curing characteristics, compared with the previously used materials, the curing curve of the material into a rapid transition state (from start to the end of the curing time is very short curing). By selecting the appropriate injection condition of this kind of material, before the material is full of the cavity, curing has yet to start, material liquidity is very good, but when the material is full of the cavity, the solidification end immediately, even if there is residual stress, the material will not flow to the parting surface, prevent waste rubber edge.
More than the advantages of silicone rubber molding is introduced as well as the corresponding new materials. In order to make these in a short period of time can be automatic molding and plastic composite forming can improve efficiency and accuracy, in selecting the right material at the same time, technology, injection molding machine, and the model is the key.