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Vaccum Casting, also known as vacuum Casting. Under vacuum conditions in both the castable for deaeration, stirring, preheating, note type, and at 60 ℃, 80 ℃ in the constant temperature box of 2 to 3 hours of secondary curing process. It is suitable for the trial production of small batch in the process of product development.


Vacuum injection equipment


Technical parameters:

Applicable mold: silicone mold (life 10-20 pieces).

Pouring material: two-component polyurethane PU. Materials used: AXSON polyurethane resin, Hei-cast polyurethane resin.

Properties: like ABS, PP, nylon, PMMA/PC transparent, soft rubber parts shord (40-90 D), high temperature (150 ℃), fire prevention materials and so on.

General working time: 1-4 hours per unit.

Standard reproduction accuracy: 0.20mm/100mm.

Thickness of pouring sample: minimum 0.5mm, best 1.5mm-5mm.

Maximum pouring workpiece: 2000mmX1200mmX1000mm.

Process:

(1) silicon mold preheating. Heat the silicon mold in advance to 60-70 ℃, die temperature too low, will cause the curing incomplete, cause poor physical properties. The die temperature is directly related to the dimensional accuracy of the specimen.

(2) pre-defoaming of pouring material. Vacuum defoaming of liquid A and liquid B in A real empty box for more than 30 minutes was carried out.

(3) pouring. Place the containers containing liquid A and liquid B in the operating room respectively. After vacuuming in the operating room, periodically stir liquid B to debubble for 5-10 minutes, pour liquid A into liquid B and stir for 30-40 minutes, and then quickly pour into the silicone rubber mold. The operation of atmospheric pressure recovery shall be carried out within 1 minute to 1 minute and 30 seconds from the beginning of mixing.

(4) curing. In the 60-70 ℃ constant temperature box for 30 to 60 minutes after curing, demoulding. When necessary, in 70-80 ℃ thermostat secondary curing for 2-3 hours.


The silicone mold

Water glass

Auto duct