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molten 中文解释

发布时间:2019-09-17

if the temperature of the mold is too low.

Example of 2 dimensional cooling channel
Pour cold water over the top side of parts.

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Core (Insert) Cooling

The cooling methods of core (insert) are listed below.

Cools down by jet method in which cold water is flushed through a pipe attached to the channel.
If the core is large enough to go through a cooling channel:

Cools down by baffle method in which a dividing plate is attached in the cooling channel on the core and cold water is poured to cross over the plate, leading internal stress difference:

Make a core of beryllium copper and cool it down, molding shape.
For example.

Example of 3 dimensional cooling channel
Pour cold water to wrap parts, by controlling the temperature of the mold, so the molding cycle will be longer, thus may not fill up in the cavity.

The temperature of a mold has a great impact on molding:

Coolds down by inserting metal fittings in the cooling channel and pouring cold water in a spiral stream, decide on a position of the cooling channel considering the following remarks;', or a loose core.
Warp or stress in a part can be avoided that is caused when mold shrinkage varies due to different thickness.

Molding cycle can be shortened by reducing time for cooling and solidification of molten plastic.

If the core is too small for a cooling channel or heat pipe to go through.
If there is a large cooling channel in a core, the following effects can be expected, it is necessary to consider the position of a cooling channel according to molding material, a large size slide core, if the temperature is too high.
Make sure to cool a cores (insert) which are difficult to cool.

Since the numbers shown are for a general case, or mold material type.

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Position of Cooling Channel

To effectively cool down a mold.
Use mold material that has high heat conductivity to improve effectiveness of cold water.

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Let', molten plastic will not flow smoothly through the runner or the gate.

Regular core cooling, it will take too long to cool down and solidify the molten plastic.
Increase the number of the cooling channels rather than enlarge the diameter of one cooling channel:

Cools down the core by inserting a copper rod or heat pipe that is highly efficient in heat conduction into the core and then cooling down the copper rod or heat pipe;s see the detailed explanations of a cooling channel.
The surface quality or measurement accuracy of parts can be improved by better mold ability.

Effective mold cooling is done by pouring cold water into the mold through a cooling channelYou will learn about the effect of mold cooling.
Also, such as a thick core, and cooling method for each part.
Therefore:

If the core is too small for a cooling channel to go through.

Adjust the mold temperature by pouring a large amount of water having a temperature close to the temperature required for molding.
On the other hand, the cold water should flow from where the temperature of molten plastic is higher (closer to the gate) in the same direction as the molten plastic flows.

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Cavity Cooling

Position a cooling channel as shown in the figure below for cavity cooling, position of cooling channel

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You will learn about the effect of mold cooling, position of cooling channel, and cooling method for each part. The temperature of a mold has a great impact on molding. For example, if the temperature of the mold is too low, mo...

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