What kind of silica gel products generally fall into the size?

Silica gel products generally fall into two kinds of size?

Shrinkage is associated with the hardness of the material of the silicone material, manufacturer provides more time is between 1.022 ~ 1.042, for 40 to 50 degrees of material, usually take 1.03 washing shrinkage. Relative to the plastic, silicone products will not produce similar apparent surface defects by shrinking. However, because the silicone products for more than a mold cavity, relative to the hole very much plastic products. So there is no plastic products as convenient size control. The general accuracy of plus or minus 0.1, high-precision products of plus or minus 0.05. When cooperate with plastic parts when the fit between the hole and buttons, minimum clearance take unilateral 0.1, recommended value of unilateral 0.2. Therefore, silica gel products generally can be divided into the following two dimensions:

1, the limit of size.

Most can do 15 ~ 20 mm thick, if it is a sphere, can do 30 mm in diameter. Generally recommended size is not greater than 3 mm thickness, when greater than 3 mm, will cost more vulcanization time and increase the cost. Can reach 0.2 MM, the thinnest place theory but take most commonly in the design of thin 0.3 MM, recommend the 0.4 MM.

2, relative size.

On the thickness difference, the most thin and the thick in suggested that not more than three times. Such problems when sulfide mainly depends on the material requirements for temperature and pressure.

Note: for the silicone rubber products set of parts, generally according to the appearance of product figure for the original figure can be supplied by the mold factory, cooperate to explain the problem, the mold factory's discretion. In general, depending on the product size, slab with products for unilateral commonly small negative deviation of 0.2 ~ 0.5.