Injection molded screening apparatuses and methods
A thermoplastic and structural technology, applied in chemical instruments and methods, screening, solid separation, etc., can solve the problems of small screening holes, complexity, and inability to bear compressive loads, and achieve the effect of eliminating requirements and easy assembly
Active Publication Date: 2018-12-18
DERRICK CORP
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Problems solved by technology
Thus, the conventional polymeric screens referred to in U.S. Provisional Patent Application Publication No. 61 / 652,039 are identical to the conventional thermoset polymeric screens described herein and in U.S. Provisional Patent Application No. 61 / 714,882, and can be made with extremely Small screen pores (as described herein and in U.S. Provisional Patent Application No. 61 / 714,882), but with all the drawbacks associated with conventional thermoset polymer screens (as described herein and in U.S. Provisional Patent Application No. 61 / 714,882 These deficiencies include lack of structural stability and durability, inability to withstand compressive loads, inability to withstand high temperatures and complexity, time-consuming, error-prone fabrication methods
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[0135] The same reference numerals in different drawings represent the same components.
[0136] Embodiments of the present invention provide a screen assembly comprising injection molded screen elements that cooperate with secondary grids. A plurality of subgrids are securely fastened to each other to form a vibratory screen assembly having a continuous screening surface and configured for use on a vibratory screening machine. The integral vibratory screen assembly structure is configured to withstand the severe loading conditions when installed and operated on a vibratory screening machine. Injection molded screen elements offer several advantages in screen assembly manufacturing and vibratory screening applications. In certain embodiments of the invention, the screen element is injection molded from a thermoplastic material.
[0137] Embodiments of the present invention provide injection molded screen elements having practical dimensions and configurations for the manufac...
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Abstract
The invention relates to injection molded screening apparatuses and methods. The use of injection-molded screen elements in particular provides: different screening surface configurations; rapid and relatively simple screen assembly manufacturing; and the combination of outstanding mechanical and electrical properties of the screen assembly, including toughness, wear resistance and resistance to chemical corrosion. Embodiments of the invention use thermoplastic injection molding materials.
Description
[0001] This application is a divisional application of the invention patent application with the application number 201380039344.7 (international application number PCT / US2013 / 030960), the international application date is March 13, 2013, and the invention title is "Injection Molding Sieve Equipment and Method". technical field [0002] The present disclosure relates generally to material screening. More specifically, the present disclosure relates to screening members, screening assemblies, methods for making screening members and screening assemblies, and methods for screening materials. Background technique [0003] Material screening includes the use of vibratory screening machines. Vibratory screen machines provide the ability to energize a mounted screen so that material placed on the screen can be separated to a desired level. Oversized material is separated from undersized material. Over time, the screen wears out and needs to be replaced. Therefore, the screen is...
Claims
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IPC IPC(8): B07B1/28B07B1/46
CPCB07B1/4618B07B1/4645Y10T29/49826B07B1/469B07B1/00B07B1/46
Inventor 基思·F·沃伊切霍夫斯基
Owner DERRICK CORP