Product Description

Low Profile Industrial Top Plate Locking Caster Wheels with Brake KT-LGP1-63SF

Material inspection guide for caster TPR plastic injection molding before processing

According to the characteristics and feeding conditions of materials, the appearance and process

performance of materials shall be tested before forming. The supplied materials often contain varying

degrees of moisture, flux and other volatile low molecular substances, especially the casters with

moisture absorption tendency. The moisture content of TPR always exceeds the allowable limit for

processing. Therefore, drying treatment must be carried out before processing, and the water

content must be measured. At high temperature, the moisture content of caster TPR is required

to be less than 5%, or even 2% ~ 3%. Therefore, vacuum drying oven is commonly used to dry

at 75 ℃ ~ 90 ℃ for 2 hours. The dried materials must be properly sealed and stored to prevent

the materials from re absorbing moisture from the air and losing the drying effect. Therefore, the

hopper in the drying chamber can continuously provide dry hot materials for the injection molding

machine, which is beneficial to simplify the operation, keep clean, improve the quality and increase

the injection rate. The loading capacity of the drying hopper is generally 2.5 times of the hourly

consumption of the injection molding machine. SBC based TPE is superior to most other caster TPR

materials in color. Therefore, they only need a small amount of color masterbatch to achieve a specific

color effect, and the resulting color is more pure than other caster TPR. Generally speaking, the

viscosity of Color Masterbatch should be lower than that of caster TPR, because the melt index of caster

TPR is higher than that of Color Masterbatch, which will be conducive to the dispersion process and make

the color distribution more uniform.

For TPE based on SBS, polystyrene color carrier is recommended.

Polypropylene (PP) color carrier is recommended for caster TPR based on hard SEBS.

For caster TPR based on softer SEBS, low density polyethylene or ethylene vinyl acetate copolymer can

be used. For softer varieties, PP color carrier is not recommended because the hardness of the

composite will be affected.

For some plastic injection applications, the use of polyethylene (PE) color carrier may have an adverse

effect on the adhesion with the matrix. The cleaning machine barrel generally adopts the heating

machine barrel cleaning method. Cleaning materials generally use plastic raw materials (or plastic

recycled materials). For caster TPR material, the transition cleaning material can be replaced with the

processed new material.

Industrial Swivel Casters Parameter

Industrial Swivel Casters Describe