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General Discussion => Service Manuals and Schematics => Topic started by: xiuumin on 15 January 2020, 05:23:15

Title: Accuracy of Chair Mould Is Measured By Tolerance Grade
Post by: xiuumin on 15 January 2020, 05:23:15
Compared with metal products, plastic products have great advantages, so now plastic products have been involved in all aspects of our life. Due to the increasing demand for plastic products in the market, plastic manufacturers have to be more efficient in producing plastic products themselves.

The injection moulding quality of Chair Mould(FURNITUREMOULD) https://www.furnituremould.com/product/chair-table-stool-mould/ includes two aspects: processing precision and surface quality. Processing precision is the degree of conformity between the actual size, shape and position of the surface of processed parts and the ideal geometric parameters required by drawings. Both it and processing error processing are geometric parameters to measure the processing surface of the chair mould.

Under normal circumstances, the processing precision of chair mould is measured by tolerance grade. The smaller the grade value, the higher the precision. However, the machining error is expressed by a numerical value. The larger the numerical value, the larger the error. High machining accuracy means small machining errors and vice versa. It is necessary to know that the actual parameters obtained by any machining method are not absolutely accurate. From the perspective of the function of the part, the machining accuracy is considered as long as the machining error is within the tolerance range required by the part drawing. However, the surface quality of the chair mould depends on the machining quality of the parts and the assembly quality of the machine. The machining quality of the parts is also composed of the machining precision and the surface quality of the parts. The main factor affecting the machining precision is the dimensional precision.

There is also the performance of the processing materials used in the injection moulding of the chair mould, which requires high hardness of the steel material. At the same time, mould processing equipment is required to have thermal stability and high reliability. For complex cavities and multi-functional composite dies, the design and manufacturing level of the dies must be improved with the complexity of the shape of the parts.

Especially when a plurality of grooves and a plurality of materials are formed or assembled into a multi-functional composite chair mould assembly in a set of moulds, a large amount of processing and programming programs are required, the multi-functional composite chair mould has high comprehensive cutting capability and high stability of a high-depth whole cavity, and the processing difficulty is increased. If the quality of the chair mould to be produced is good, the mould manufacturer must design the drawing of the mould in advance, so as not to rush out the drawing when the chair mould is really needed and lead to poor quality of the mould.

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