Silicone rubber Catheter Manufacturing Equipment for medical And LSR mold

When designing the liquid silicone rubber injection molding mold, first of all, the position of the parting line should be considered, because some channels need to be set inside the parting line. These channels are used to complete the ventilation task, and the ventilation holes must be set at the end of the mold where the injection materials finally arrive. Considering the above factors in advance will help to avoid the air entrainment and the loss of the edge seam strength of the welding line. Due to the low viscosity of LSR, it is necessary to ensure the accuracy of the parting line to avoid burrs. Nevertheless, the parting line on the final product is clearly visible. The geometry of the part and the position of the parting line also affect the film removal process. In component design, light undercutting helps ensure a strong bond between the molded part and the mold cavity

About Machine

Shrinkage although liquid silicone rubber does not shrink in the process of injection molding, due to its high coefficient of thermal expansion, it usually shrinks by 2% - 3% after film removal and cooling. The exact shrinkage data mainly depends on the material formula, but from the processing point of view, if the designer considers some factors that affect the shrinkage in advance when he conceives, the final shrinkage situation will change. These factors mainly include the processing temperature, the temperature of material film removal, the cavity pressure, etc. In addition, the position of the injection port should be considered, because usually the shrinkage of the material in the flow direction is more obvious than that in the vertical direction. In addition, the size of components is also an influence factor. Generally speaking, the thicker the components are, the smaller the shrinkage is. If secondary vulcanization is required in practical application, an additional 0.5% - 0.7% shrinkage should be considered.

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Tianyuan focuses on serving customers for more than ten years. Tianyuan Machinery provides one-year free warranty and lifetime maintenance, so as to avoid your worries in the

production process!