Product Details
Injection-molded parts with thick walls require many factors to be considered when designing the part, including functional and dimensional requirements, tolerances and fit, appearance, manufacturing cost, environmental impact, and after-sales service, to name a few. This article focuses on the manufacturability of thermoplastic injection molded parts, considering the impact of part wall thickness on cycle time, product shrinkage and warpage, and surface quality.
This type of injection molding technology is particularly suitable for tubular products, thick-walled, partial-walled (parts composed of cross-sections of different thicknesses), and large flat structural parts, opening up new areas of plastic molding applications for TVs, home appliances, automobiles, furniture, daily necessities, office supplies, toys, etc.
Parameter of the Injection molded wall thickness parts
Product Description | Custom OEM Injection-molded wall thickness parts |
Plastic Materials | ABS, PP, ,PA, ,PC,,Acrylic etc |
Surface Finish | Per customers' request |
Making Process | Plastic Injection, CNC Machining |
Design & Program Softwares | CAD, CAM, CAE, Pro-E, UG, Solid works, Moldflow, CATIA….etc |
Package | Standard exported Wooden box packed, Fumigation process(upon required) |
In establishing the fundamental wall thickness of plastic parts, the following factors need to focus on consideration
1] the choice of plastic materials different plastic materials in the design of the most correct wall thickness range, too thick appearance easy to produce depressions, too thin injection poor liquidity
2] the need for fire rating
To pay attention to the same plastic materials, in different fire ratings, the required minimum wall thickness is not the same. Sometimes, when the basic
Sometimes, in the case of the basic wall thickness has been determined, in order to meet the fire requirements, it is often necessary to choose a new material if there is no suitable material.
If no suitable material is available, then the fundamental wall thickness of the product needs to be increased.
Different products have different safety requirements, different safety requirements have different fire ratings, home appliance products generally require
UL 94-V0, ovens need more UL 94-5VA / B
MINDWELL's Injection-molded wall thickness parts point of view:
1. wall thickness is too thick easy to waste materials, increase the cost, more importantly, to extend the cooling and curing time, easy to produce depressions.
shrinkage, sandwich, and other quality defects. So should be uniform, the wall and the wall connection should not be too big a difference in thickness, and should try to use the arc connection, no then easy to open the column. Generally, it is 1~5MM, 1.5~2.5 for small pieces, and 3~10'MM for large pieces.
3~10'MM.
2. The height of the reinforcement is usually about 3 times the wall thickness of the plastic parts, and 2 to 5 degrees of the release slope, and the plastic wall connection out and end, the application of arc connection. Prevent stress concentration. The thickness of the reinforcement should be 1/2 of the wall thickness of the plastic part, if it is too big, it is easy to produce deflated concave. If more than one reinforcement is to be set, the distribution should be staggered to prevent rupture.
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