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How to solve bubble problem in TPU injection molded part
Jan 29 , 2021
Bubbles are the one of major defects in TPU molded parts during injection. Bubbles in TPU molded parts not only results in appearance problems but impairs physical properties as well.There are two types of bubbles, it may be a voided area trapped within a molded plastic part or trapped gases in a molded plastic part. There are three major reason that cause bubbles in injection products. Bubbles ca...
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How to prevent and remedy the burrs(flash) in the TPU injection parts during injection process
May 10 , 2021
Burr is a common problem encountered in TPU injection products. A burr (also known as a “flash”) is an unwanted raised edge or small piece of TPU material left in a part after a injection manufacturing process. Burrs not only disfeature the appearance of plastic parts but also affect it’s properties. How to analysis and solve the burrs problem during TPU injection process. Burrs of a TPU...
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KUNSUN 20ft full container loading of TPU Resin S-185AL to Vietnam
May 25 , 2021
Today, KUNSUN 20ft full container loading of Thermoplastic Polyurethane TPU Resin S-185AL to Vietnam. In this shipment, TPU granules are packing by 1400kg/pallet. Compared to the usual 1000kg/pallet, It load extra 400kg/pallet and can load 4000kg additional cargo if it load 10 pallets in one container. It greatly saves the customer's ocean freight. It help customers to deal with the container ...
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KUNSUN 40ft full container loading of TPU Resin S-190AL to Vietnam
Jun 25 , 2021
Today, KUNSUN 40ft full container loading of Thermoplastic Polyurethane TPU Resin S-190AL to Vietnam. In this shipment, 40ft full container loaded with 20 pallets and 25 tons TPU granule.Thermoplastic polyurethane S-190AL is polyester based transparent TPU plastic particles with density of1.21±0.02 g/cm3, tensile strength of 300 kgf/cm2, elongation at break of 550%, hardness of 91A±2 A.S-190AL is ...
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Classification and application of TPU over-moulding
Jul 07 , 2021
TPU over-moulding mainly divided into bond with metal and bond with plastic.TPU bond with metal is to encapsulate a layer of soft plastic on the metal surface. It make the surface of the metal features with anti-slip, shock-absorbing, anti-corrosion. There are generally four over-moulding methods in TPU overmoulding metal.1. Block over-mouldingTPU block over-moulding has defect of poor bonding and...
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Causes and solutions of dents in injection molded parts
Jul 16 , 2021
Dents in injection molded parts are all defects caused by insufficient melt replenishment when the thicker parts are cooled. The shrinkage of plastic parts (surface shrinkage and internal shrinkage) The main reasons for such defects are improper control of molding conditions, mold defects, raw materials that do not meet the molding requirements, and unreasonable design of the shape of the plastic ...
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What causes cracking in TPU plastic injection molded parts and how to fix it
Jul 30 , 2021
Cracks are a fatal defect of TPU products, it usually happens to be hairy cracks on the surface of the product. It easily happened in the sharp edges and corners. It is harmful for products usage when the invisible cracks occur in the injection parts,The main reasons that cause cracks during production are as follows: 1 Difficult to demold 2 Overfilling 3 Mold temperature is too low 4 Defects in p...
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Causes and treatment methods of warpage in Plastic Injection Molding
Aug 13 , 2021
Warpage is the injection product defects that parts deviates from the shape accuracy requirements of the part. It is one of the common and difficult solved defects in injection mold design and injection production.Causes of warpageWarpage is caused by uneven stress and shrinkage during the products injection process. Die Adhesion, insufficient cooling, inadequate shape and strength of the part, po...
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How to deal with the slippage of the screw barrel in TPU injection molding process
Aug 27 , 2021
There are many reasons that cause the slippage of the screw barrel. For example, the abrasion of the screw and barrel. The compression ratio of the injection molding machine screw, if the feeding section is too short and the compression ratio is too small will led to the conveying capacity decrease and the screw slip. The one-way valve (check valve) malfunction can also lead the screw slip. In add...
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