Technical requirements in precision mould processing

Technical requirements in precision mould processing

A couple mould
A couple mould

Precision mould manufacturing companies, mould-making companies, and mould fabrication companies often adhere to strict technical requirements in precision mould manufacturing, which hold significant importance. Even a minor error can greatly impact the quality of the mould, completion time, and production costs.

Precision mould manufacturing involves various stages that require different technical specifications. The fundamental machining techniques used today include high-speed CNC milling, electrical discharge machining (EDM), and wire cutting (WC).

A big mould with Sevintive hot runner
A big mould with Sevintive hot runner

There are many important considerations in precision mould processing, including:

Requirements for the shape and dimensions of the mould in precision mould processing:

The shape and dimensions of the mould allow for extremely small tolerances. Incorrect dimensions can have a significant impact on the entire mould manufacturing process. Additionally, the allowable tolerance is very small, typically measured at 1/1000mm.

Requirements for the materials used in mould fabrication:

Mould components checking
Mould components checking

The material used in mould fabrication must be chosen to ensure appropriate hardness, wear resistance, and ease of performing machining and mould manufacturing operations. This results in the production of high-quality mould products with a long lifespan.

Requirements for surface finish

Hoàn thiện bên ngoài khuôn
External surface finishing

The process of polishing moulds in reality requires strict technical standards. The surface gloss of the cavity and core is a decisive factor in determining the overall gloss and aesthetic quality of the produced product. Over-polishing or under-polishing can both result in the mould not meeting the required quality standards.

There are also requirements for the compatibility of the two halves of the mould in precision mould manufacturing.

During the plastic injection process, the tightness of the two mould halves when they are assembled together must be optimized to ensure the production of plastic products with impeccable quality.

There are also requirements regarding the design and manufacturing processes.

mould design
Mould design

Design and manufacturing must ensure consistency, resulting in easy mold release of the final product. This process directly relates to the tightness of the two halves of the mold during assembly, manufacturing, and the surface finish of the mold during machining.

Requirements for mold hardness

During the plastic injection molding process, the mold must meet the required hardness to prevent deformation or deviations under the applied pressure. This ensures the quality of the resulting products.

Meeting the technical requirements in mold manufacturing ensures a smooth process and delivers the desired plastic products.

Common errors in precision mold manufacturing

If the technical requirements in precision mold manufacturing are not fully met, several common errors can occur:

Errors in mold cavities in precision mold manufacturing

For complex mold products with multiple components, more time and effort are required for fabrication and inspection.

Errors in mold cavities often occur during polishing and surface finishing. The polishing process needs to be carried out with meticulous and careful operations to ensure a smooth and mark-free surface.

If the surface finish of the mold cavities is not ensured, it can make it difficult to extract the resulting product, leading to material shortages or heavier ejections that can affect the shape and structure of the product.

Errors in the two halves of the mold

The appearance of errors in the two halves of the mold is often due to incorrect design or assembly operations that do not meet the technical requirements. Specifically, design with large tolerances or improper assembly resulting in loose or misaligned mold halves.

Errors in the two halves of the mold in precision mold manufacturing can cause defects in the plastic product, affecting the production efficiency and requiring additional labor to rectify the errors.

Error with redundancy of details

The technical requirements in precision mold manufacturing must be strictly adhered to. Excessive parting line flash is a common occurrence when the mold cavity design is inaccurate, which can affect the quality of the product.

After being removed from the mold, products with excessive parting line flash require cleaning and additional steps to rectify the issue, resulting in increased time and effort.

In reality, there are many potential errors that can arise during precision mold manufacturing. Therefore, choosing a capable and reputable precision mold manufacturing company is essential.

Viet Chuan Corporation is a specialized and reputable company in precision mold manufacturing with expertise, credibility, and responsibility. By partnering with us, you can trust that all the technical requirements in precision mold manufacturing will be perfectly met, resulting in high-quality mold products.


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