Importance of mold cooling.

Water channel influence Molds cycle time, parts deformation, parts quality ect. so it's very important to make parts making efficiency with good Mold cooling desing,  details influence as below.

Heat dissipation: During the use of Mold, a large amount of heat will be generated due to processing, friction, oxidation and other reasons.

If the heat cannot be dissipated in time, it will have an adverse effect on the quality and life of the Mold.

Cooling:For those products that require high temperature manufacturing, such as plastic products, die castings, etc.,

the water circuit plays a cooling role, which can not only ensure the production quality, but also effectively reduce the production cost1.

Lubrication: The Mold water circuit can form a thin film on the Mold surface to make the Mold surface smooth,

 avoid wear caused by dry friction, and ensure production efficiency and Mold life1.

Influence on quality: During Molding, the water circuit is used to control the Mold temperature, and the mold temperature and its fluctuations have an impact on the shrinkage deformation, dimensional stability, mechanical strength, stress cracking and surface quality of the product3.

In summary, the influence of mold water circuit on mold is multifaceted. 

It is not only related to the service life and production efficiency of the mold, but also directly affects the quality and production cost of the product. Therefore, in the process of mold design and maintenance, the design and management of mold water circuit must be highly valued.

The following points should be noted mold design for water lines:

Water channel center distance control:The water channel center distance should be controlled at 3~5 times the water channel diameter, and the center distance between the water channel and the product surface should be controlled at 1.5~2.5 times.

Even water channel location arrangement: The front and rear mold core water channels should be arranged as evenly as possible. If conditions permit, the water channels should be designed at the corners of the product as much as possible.

Avoid local aggregation or evacuation: When the product thickness is uneven, the water channel position can be fine-tuned to ensure uniform cooling consistency of the product.

Water channel connection principle: Prioritize the processing of long water channels, and then connect the short water channels to avoid drill bit breakage.

Water inlet design:The water inlet should be designed in high-heat areas to effectively achieve the effect of water channel cooling.

Ensure smooth fluid flow:Consider factors such as the flow rate of the fluid, the cross-sectional shape of the pipeline, elbows, and branch ports to reduce the resistance and energy consumption of the fluid.

Uniform cooling: Reasonably design the cooling water channel so that the cooling water is evenly distributed on the entire mold surface to avoid deformation or stress concentration.

Avoid dead corners and gas accumulation: Dead corners and gas accumulation should be avoided as much as possible during design.

Fully consider material properties: Consider the thermal conductivity, thermal expansion coefficient and other properties of the mold material to determine the appropriate cooling water channel position and size.

Simplify the water channel structure:Try to simplify the water channel structure, reduce connections and branches, and avoid too many elbows and pipes.

Consider maintenance and cleaning: Reasonably set up drainage and cleaning ports to ensure that the water channel is unobstructed and clean.

Consider scalability: Reserve appropriate interfaces and space for adjustment and improvement according to actual conditions.

Avoid dead water areas: Dead water (water that does not flow) is not allowed in the water channel, and the length of the water channel should not exceed 30mm.

Cooling water circuit setting: The inserts of the moving and fixed molds and the cooling water channels of the moving and fixed mold cores should be separated and cannot be connected in series.

The above are several key points that need to be paid attention to when designing the mold water channel. Designers need to consider these factors comprehensively and design in combination with the specific mold structure and product characteristics.

More technical, contact TTM by info@ttmoulds.com