Cheap 1200 Grit Aluminum Oxide Suppliers Malaysia

If the temperature is too high, the cooling of the investment mold will be slow, the shrinkage rate will be increased(white alumina powder), and the defects such as deformation and shrinkage will be easily produced, and the productivity will be decreased. The relationship between die shrinkage and injection pressure is: the higher the injection pressure, the smaller the linear shrinkage(aluminum oxide 40 grit). It is better to control the working temperature in the range of 20 ~ 25 ℃.

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The longer the holding time is, the smaller the linear shrinkage is(white aluminum oxide abrasive 220 grit). There are even defects such as insufficient pouring or cold shut. In actual production, the residence time of small and medium-sized parts in the pressing process is generally about 1-5 minutes(white fused alumina for refractory). The investment mold with high dimensional accuracy should be placed in the special bracket or template (cast by gypsum, epoxy resin or fusible alloy) to stabilize the quality of the investment mold.

(cheap 1200 grit aluminum oxide suppliers malaysia)If the time is too short to open the mold, its surface will appear "bubble"(aluminum oxide abrasive media). When the wax injection temperature drops to 48 ~ 52 ℃, the solid components in the mold material increase, the fluidity disappears, and the mold material gradually becomes paste like. When the wax injection temperature drops below 48 ℃, the surface roughness will continue to increase(brown aluminium oxide 24 mesh). When r > 4pm (equivalent to V4 ~ V5), the surface roughness will be more rough.

In order to shorten the mold opening time and improve the productivity(aluminum oxide 180 grit blast media), the mold can be forced to cool (water-cooled or cold pressed). After opening, the investment mold can be put into cold water for setting. Forced cooling can also prevent or reduce the shrinkage of the thick wall of the investment mold. Another way to prevent the shrinkage of the thick wall is to place a cold wax block in advance to reduce the shrinkage(brown aluminum oxide sandblasting). The taken out investment mold should be stored smoothly.(cheap 1200 grit aluminum oxide suppliers malaysia)

In order to prevent the mold material from adhering to the mold cavity, facilitate the mold lifting and improve the surface quality of the investment mold(aluminium oxide sandblasting), a layer of parting agent (or release agent) should be applied or sprayed on the surface of the pressing cavity before wax injection, and the parting agent should be thin and uniform(brown aluminum oxide 16 grit). The length of cooling time in mold depends on wax injection temperature, mold wall thickness and cooling conditions.

(cheap 1200 grit aluminum oxide suppliers malaysia)Therefore, the working temperature of the molding also affects the quality of the investment mold(white aluminum oxide 120 grit), and the temperature of the common molding should be kept at about 25 ℃. Commonly used parting agents: atomized silicone oil is a good quality and good performance. It is a high-quality demoulding agent suitable for investment casting resin matrix and wax base mold making process(white aluminium oxide super fine). It is a colorless, non-toxic, and odorless solvent based spray release agent made from methyl silicone oil.

After wax injection, the surface roughness of the investment mold increases to r.1.5 ~ 2.5 am (equivalent to V6). The investment mold is cooled and solidified in the pressing process(aluminum oxide blasting abrasive), and it will continue to shrink in a few hours after it is taken out. Most of the mold materials usually take more than 8 hours to stabilize the size(aluminum oxide 30 or 40 grit). In order to prevent the deformation of the investment mold, the temperature control should be carried out in the mold making and storage room.(cheap 1200 grit aluminum oxide suppliers malaysia)