VA / VE points of medical plastics

Here we introduce the examples of achieving cost reduction and VA / VE from the design stage of medical plastic products in the style of Before and After with illustrations and characters. With just a few points, you will be able to learn how to prevent sinks, welds and warpage, which are problems in injection molding, and how to improve the functionality and quality of final products.

Ⅰ Points of cost reduction in product design

• Avoiding cost increase by using equivalent materials
• Component manufacturing design that can be used for multiple purposes
• Reduction of man-hours by adjustment of fitting parts
• Preventing warpage by thinning the corners of a rectangular container
• Cost reduction by setting tolerances only at appropriate points
• Suppression of sink marks on thick parts

Ⅱ Points for reducing the defective rate in product design

• Measures against leakage of medical fitting containers by adding fitting allowance
• Improvement of hygiene quality by eliminating unevenness of parts
• Improvement of sealing of fitting part by luer taper
• Product design considering secondary processing such as welding and adhesive seal
• Weld prevention design for round containers
• Avoiding liquid leakage troubles by flow analysis

Ⅲ Points for improving convenience in product design

• Improvement of workability at the site of use by installing a large radius
• Prevention of loss of parts by adding stoppers
• Prevention of operation errors by adding a lock mechanism
• Improvement of use satisfaction by using double-start screws

Ⅳ Points of mold design

• Changing the gate position with consideration at assembly
• Cost reduction by simplifying mold structure
• Mold design for avoiding short mold of thin molded products
• Mold design to suppress jetting
• Improvement of airtightness by stripping with stripper method
• Key points of mold design for submarine gate
• Improvement of product quality by improving resin fluidity
• Cost reduction by utilizing pin gate submarine gate

Ⅴ Points of material change / sterilization process

• Points of sterilization measures for medical plastic products
• Selection of resin for medical grade plastic injection molded products
• Selection of plastic resin considering material properties