Injection molded screening apparatuses and methods
AssigneeDerrick Corporation
InventorKeith Wojciechowski
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Abstract
Screening members, screening assemblies, methods for fabricating screening members and assemblies and methods for screening materials are provided for vibratory screening machines that incorporate the use of injection molded materials. Use of injection molded screen elements provide, inter alia, for: varying screening surface configurations; fast and relatively simple screen assembly fabrication; and a combination of outstanding screen assembly mechanical and electrical properties, including toughness, wear and chemical resistance. Embodiments of the present invention use a thermoplastic injection molded material.
Claims30
A screen assembly, comprising:
- a plurality of independently formed thermoplastic screen elements forming a screening surface, the screen elements having:
- screening openings that are elongated slots having substantially uniform width W and substantially uniform length L;
- and
- surface elements separating the screening openings, the surface elements having a thickness T that is approximately 70 μm≤T≤400 μm.
A screen assembly, comprising:
- a plurality of independently formed thermoplastic screen elements forming a screening surface, the screen elements having screening openings that are elongated slots having a substantially uniform width W that is approximately 40 μm≤W≤200 μm, and a substantially uniform length L that is approximately 0.7 mm≤L≤2 mm,
- wherein the screen assembly has an open screening area of approximately 5% to approximately 35% of a total area of the screening surface.
A method of fabricating a screen assembly, comprising:
- injection molding a plurality of thermoplastic screen elements, the screen elements having:
- screening openings that are elongated slots having substantially uniform width W and substantially uniform length L;
- and
- surface elements separating the screening openings, the surface elements having a thickness T that is approximately 70 μm≤T≤400 μm;
- and
- forming a screening surface that includes the plurality of screen elements.
A method of fabricating a screen assembly, the method comprising:
- injection molding a plurality of independently formed thermoplastic screen elements, the screen elements having:
- screening openings that are elongated slots having substantially a uniform width W that is approximately 40 μm≤W≤200 μm, and a substantially uniform length L that is approximately 0.7 mm≤L≤2 mm, forming a screening surface that includes the plurality of screen elements.
Dependencies are inferred from the claim text.