Polyurethane Casting Resin produced eight more durable methods
When we use Polyurethane Casting Resin, in order to save costs and improve work efficiency, of course, hope Polyurethane Casting Resin can flip the number of times, long life. How can you make the life of Polyurethane Casting Resin grow and ensure that Polyurethane Casting Resin is more durable! Here to take you to see the following eight ways it!
The first choice of perfusion method of making Polyurethane Casting Resin, according to the fine pattern to select the appropriate hardness of the silica gel.
Under normal circumstances:
Silicone hardness of 10-30 Shore degrees, the higher the hardness, the quality is relatively better; silicone hardness of more than 30 Shore degrees, the higher the hardness, the quality is relatively poor.
1. The pattern of simple products, anyway, easier to mold release, it is recommended to choose the hardness of the larger; 2 pattern fine products, due to fear of damage to the product, the actual situation will generally choose a little smaller because the more soft the better off Mode, but at the same time, the quality will be relatively poor.
However, we can still choose the hardness of relatively large point of the silica gel, as long as the Polyurethane Casting Resin on the open line can be, one to facilitate the stripping, and secondly, because the release of more than pulling more lead to die scrapped fast , And ultimately played a role in extending the life of the silica gel.
The second model according to the size of the product selection or brush mode.
If this product size is large, it is necessary to use the brush, although the province of provincial and provincial efforts to save time, but it is very burning Oh ~ because so large products using irrigation mold, a waste of silica to increase costs, Heavy will be easy to crush Polyurethane Casting Resin lead to deformation or rupture, but you choose to brush the mold, then you can add a few layers of gauze inside the mold can enhance the toughness and strength, coupled with the support of the outer mold is not easy to be crushed Or pressure deformation.
The third according to the size of the product to choose the appropriate hardness of the silica gel.
1. Small pieces of products, generally more soft silica gel more appropriate. Because the silicone when the mold will be very brittle, it is easy to break the small parts of the product, this will also cause the mold is not durable Oh.
2. Large products, such as stone cement products so hard so heavy, if the choice of soft mold silicone material, mold is it easier to be crushed? Because the silicone is too soft, its tension and tear strength will be reduced, made out of the mold will be deformed, the service life will naturally be reduced.
The fourth silica gel and curing agent to stir evenly.
Otherwise there will be dry in the dry, or curing the uneven situation, there will be such a situation caused by scrap, to try to avoid.
The fifth vacuum bubble is also able to extend the life of the mold.
A mold inside full of holes, full of bubbles, you dare to say that the mold has a good tear strength?
The sixth resin product should be stripped as soon as possible so that the mold is burned out
Because the unsaturated resin and resin products added peroxide curing agent, the resin reaction will produce a lot of heat, the general resin curing time of 3 minutes, so 3 minutes after the release as soon as possible to prevent Polyurethane Casting Resin not Will produce the phenomenon of burning mold.
The seventh choice when the quality of silicone check in place Oh
Some silicone manufacturers to reduce the cost of the production of silica gel in the process of adding a combination of silicone oil (silicone oil and white mineral oil complex), will lead to make the Polyurethane Casting Resin serious oil, which will seriously affect the Polyurethane Casting Resin quality and service life
Eighth in the production process of the mold, it is recommended in the silica gel do not add any silicone oil due to product changes
Many people will sometimes take the initiative to silica gel to add silicone oil to reduce the hardness of silica gel or dilute the viscosity of silica gel purposes, here Xiaobian suggested not to add any silicone oil silicone Oh. Because the greater the amount of silicone oil added, made out of the mold will become soft, tension and tear strength will be reduced, the silicone will naturally be difficult to use, the service life will be reduced. If necessary, silicone oil is best not to add more than 5% -10%.