Tooling/Mold for Isostatic Pressing

Tooling for Isostatic Compacting :

• Cold isostatic pressing tooling is composed of two parts—theelastomeric mold, or bag, and a mandrel.

• Elastomeric molds are made of a variety of materials; some are flexible, while others are fairly rigid.

• An outside fixture to hold the loaded form is required if the mold is exceptionally flexible.

• A number of factors must be considered in the selection of a mold material.

• Primarily, the mold material must not interact with either the powder or the pressure medium.

Materials have a range of durabilities.

• Depending on the size of the production run and the abrasiveness of the powder, a material with the appropriate wear resistance should be selected.

• Mold materials used include natural rubber, neoprene, urethane, polyvinyl chloride, butyl, nitrile, and silicone.

Suggestions for mould are:

(1) Disposable and reusable mould materials are recommended. Disposable mould materials are polystyrene- polyethylene which provide thin wall envelopes and prevent breakage of the given compact, but the mould becomes expensive. Reusable materials are: urethane, silicone rubber, neoprene, natural rubber and provide

 (a) greater wall thickness of the envelope

(b) good shape control but complex parts may break upon pressure release.

(2) The mould material must be sufficiently flexible (high elastic deformation) with low permanent set to accommodate the volume changes during compaction.

(3) It must have a sufficient hardness and high resistance to abrasive wear. High hardness also means no penetration of the material between powder particles and hence a good surface finish of the compacted part. But in case of too high a hardness, compressibility is poor and intricate shapes are difficult to fabricate. A hardness between 65 and 95 shore A is used depending on the powder material and part shape.

(4) Flexible thin walled envelopes may deform when filled with powder and support must be provided to control the compact shape e.g. container with holes is used or use of fasteners is made.

Some samples we made:

Jiangsu High Industry on the research and development and production of high-performance polyurethane isostatic pressing molds. Through in-depth cooperation with many isostatic pressing equipment manufacturers and in-depth study of the industry, the developed isostatic pressing polyurethane mold series products have the characteristics of long service life, high precision, small deformation, easy demoulding, etc., and are widely used in ceramics, etc. Static pressing mould, cemented carbide isostatic pressing mould, rare earth permanent magnet material isostatic pressing mould, graphite isostatic pressing mould, etc.

We support all kinds of customization, if you need it, please contact us.

Phone/whatsapp:+86 18234744811

Email:sales@highindustryco.com