Mold cooling system design

The mold cooling system includes: cooling water channels, mold temperature controllers and heating components, Mold Cooling Components, etc.:
Purpose of cooling system:
(1) Prevent plastic parts from deforming during demolding.
(2) Shorten the molding cycle.
(3) Improve the quality of plastic parts and control the mold temperature.

The position of the cooling water channel in the mold:
The location of the cooling water channel depends on the different wall thicknesses of the shape of the finished product. In principle, the cooling water channel is set in the place where the heat conduction from the plastic is difficult. According to the design principles of the cooling system, the cooling water channel should surround the molded product of the mold and be arranged as uniformly as possible.

In addition, the impact of different Mold Cooling components should also be considered. Sometimes newer Mold Cooling components may provide some solutions.

1. Design principles of mold cooling system:

• The number of cooling water holes should be as large as possible and the diameter should be as large as possible.
• The distance between the cooling water holes and the surface of the cavity should be equal. Generally, if the distance is kept in the range of 15-20 mm, the cooling will be uneven if the distance is too close, and the efficiency will be low if the distance is too far. The diameter of the water hole is generally Ф8-12mm, and the hole distance Good for 5 times the diameter of the water hole.
• When the water hole passes through the core insert, pay attention to adding an “O” ring（A simple Mold Cooling component, available in various sizes, made of rubber, suitable for sealing） to prevent water leakage.
• The water hole cannot be interfered by anything else.
• The distance between the water hole and the thimble hole, core insert hole, screw hole, etc. should not be too close to ≧5mm.
• The waterway should be easy to process, and try to avoid drilling water holes from the molding surface.
• Choose high-quality Mold Cooling Components. Inferior Mold Cooling Components will cause water leakage inside the mold, which will cause product production to be unsmooth, and in severe cases, it will rust the mold.

2. The setting of the cooling water channel of the template.

Many small mold cavities are directly processed on the template. This type of mold can be directly equipped with cooling water channels on the template, and cooling water channels on the template. The design of the cooling system should also be followed. The principle is to make the cooling water channel as close to the surface of the cavity as possible and surround the cavity as much as possible, so that the finished product is cooled evenly during the molding process.
Precautions for template cooling water channel:

• If the cooling water channel of the mold is too long, the water temperature will increase during the molding process (the temperature of the water inlet and the water outlet are very different). To solve this problem, to ensure the cooling effect, add two or more independent water channels.
• The intersecting water channels usually insert some simple Mold Cooling Components, such as Shut-off Screw, to change the flow direction of the coolant.
• If the finished part of the mold is inserted into the template by core insert, the distribution of the cooling water circuit is best to use the method around the core insert.

3. Mold core cooling channel setting

For a mold with multiple cavities, the cooling mode of the mold core can be divided into two types: series cooling and parallel cooling.

• 1.The series cooling water circuit has the advantage of strong flow, but it has the disadvantage of large temperature changes as the number of mold cores increases.
• The parallel cooling water circuit does not change much with the temperature gradient, but the flow is not strong enough, and the result will be uneven cooling effects on different mold cores.

Therefore, the arrangement of the two cooling water channels is only suitable for molds with a small number of mold cores. For a multi-cavity mold with one mold, the above two cooling methods are best used together with the method of establishing two or more independent circuits. Sometimes you consider adopting some new types Mold Cooling Components to solve some problems. In many molds, some mold cores with special shapes and sizes are thin and long, and they need to be temperature controlled during the molding process. As we all know, cores with smaller diameters (usually less than 6mm) and longer sizes are due to their smaller surface. Makes heat conduction very difficult.

4. the setting of the slender mold core cooling water channe

During the molding process, due to the poor heat dissipation of the slender core, it will cause the product to appear deformation, shrinkage and other defects in this part. Therefore, a special cooling method must be used to treat the slender core. The temperature is controlled. For this type of mold core structure, the following cooling methods are usually used in the design:

•  Cooling water surrounds the mold core.
• Use materials with higher thermal conductivity (such as beryllium bronze) to make slender mold cores.
• Add a thin copper rod to the thicker part of the mold core (usually greater than 8mm in diameter), and one end of the thin copper rod is connected to the cooling water path in the template. However, I recommend a new type of Mold Cooling Components, which is Heat Transaction Pipes from THREEIUP. The heat conduction efficiency of this product is hundreds of times that of copper rods, and it can transfer the heat inside the mold core at an extremely fast speed.
• Consider using another Mold Cooling Components——Cooling Pipes, which transports the cooling water from the bottom of the water channel to the top of the slender mold core through a very thin tube, and then flows back to the bottom to take it away in this way Heat of mold core.

5. O-ring
   O-ring is a Mold Cooling Components commonly used in molds, and is generally made of high-temperature resistant fluorine rubber. In the mold structure, the cooling water path passing between different templates or the joints between the template and the mold core will cause coolant leakage due to the matching gap in the combination. In order to avoid this phenomenon, the “O” ring is usually used to seal the combined species. . When using the “O” ring, the mold structure should take into account that there is sufficient positive pressure between different templates and between the template and the core insert.
6. The connection of the cooling pipe and the mold

The correct position of the Hose Nozzle (a kind of Mold Cooling Components, which facilitates the connection of the water path) of the mold cooling water channel in the mold:

•  After the mold is installed on the injection machine, the Hose Nozzle of the cooling water channel has a tie rod that can directly face the injection machine to avoid difficulty in installing the water pipe.
• The Hose Nozzle of the cooling water channel is best installed behind the injection machine (i.e. another example of the operation of the injection machine) so as not to affect the operation.
• The Hose Nozzles should not be too close to each other to avoid difficulty in installing and fixing the water pipe.

FAQ:

1.What types of Mold Cooling component do you produce?

Mold Cooling system is an indispensable part of the Mold Cooling component. The quality of Mold Cooling component is special and different manufacturers have different specifications. As a manufacturer with more than 20 years of production experience, We are able to produce the vast majority of Mold Cooling components on the market. Including DME, HASCO, MISUMI and other companies specification products. We have the same quality and a big advantage in price on time.

2.What specifications do you sell the Quick Connector most often?

The Quick Connector is one of the most common Mold Cooling components. We can provide the following models of Hasco’s Z80/9, Z80/13, Z80/19, Z80/9, Z80/13, Z80/19, Z80/9/45, Z80/13/45, Z80/19/45, Z80/9/90, Z80/1 Z80/19/90, Z801/9/90, Z801/13/90, Z801/19/90, Z8051/9/125, Z805/9/125, z807/13/16 *1.5, Z807/19, 24*1.5, z801/1 9 / R1/2, Z807 * 1.5/9/14, Z807/13/16, Z807/19/24 * 1.5 * 1.5, Z808 24 * 1.5 * 1.5/13/16, Z808 /, Z809/13/16 * 1.5, Z809 / / R3/8, 13 Z819 * 1.5/13/16, Z819 / / R3/8, 13 Z81/9/8 *0.75, Z81/9/10*1, Z81/9/R1/8, Z81/13/R1/4, Z81/13/14*1.5, Z81/13/R3/8, Z90, Z81/13/R1/4/90, Z89, Z88/9/10*1, Z876, Z878 , Z905, Z906, Z91..

We can provide the following models of DME:

JS206、JS216、JS226、JS306、、JS316、JS326、JP251、JP252、JP351、JP352、JP353、JP354、、JP553、JPF251、JPF252、JPF253、JPF351、JPF352、JPF353、JPF354、JPF553、JP252-SV、JP253-SVJP352-SV、JP353-SV、JP354-SV、JS-206-SV、JS-216-SV、JS226-SV、JS306-SV、JS316-SV、JS326-SV、SK106、SK109、SK111、SK113、SK119、SVK106、SVK109、SVK111、SVK113、SVK119、SVK200-300-500、SK200-300-500、N6-1/8A、、N6-1/4A、N6-3/8A、N9-1/8A、N9-1/4A、N9-3/8A、N16-1/2A、N6-1/8L、N6-1/4LN9-1/4L、N9-3/8L….

3.What Mold Cooling components do you recommend?

The most recommended Mold Cooling component, I think, is Heat Transaction Pipes, which has extremely high thermal conductivity for both Cooling and heating the Mold core. The thermal conductivity is 200 times higher than that of ordinary brass, which is incredible.

4.There are many types of Mold Cooling components, how do I choose?

This mainly depends on your usage habits. There are indeed many varieties and specifications of Mold Cooling components. Different companies have their own Mold Cooling components. You can tell us the product models currently in use and we can provide you with the products you need.

5.How long is the delivery time of the Mold Cooling components?

We have a certain amount of stock for commonly used Mold Cooling components, and some size need to be produced, which usually takes about a week. Large quantities of orders need to be separately determined for delivery.

6.What is the minimum order quantity for Mold Cooling components?

There is no minimum order requirement for our products. Of course, if you plan to purchase too few quantities, it may not be very cost-effective for freight.

7.What are the considerations when purchasing Mold Cooling components?

Different Mold Cooling components have different spiral teeth. You must confirm that they are corresponding to the spiral teeth of your Mold when purchasing, otherwise they cannot cooperate closely and will lead to water leakage. And most importantly, if you want to purchase high quality Mold Cooling components, contact us and you won’t be disappointed!