We can produce hot runner system,hot runner systems in China. |
Send Mail To Us:sales@capmold.com |
|
||||||||||
Cap Mold | Pet Preform Mold | Thin Wall Mold | Medical Mold | Blowing Mold | Hot Runner System | |||||||
|
||||
Yichuan series preform injection mold adopts
specially designed hot runner system to achieve ideal and
prompt heating effect for preform production. We are hot runner system manufacturer,
hot runner system supplier, hot runner system provider, hot runner system
maker in China. A hot runner system (also hotrunner system, hot-runner system) is an assembly of heated components used in plastic injection molds that inject molten plastic into the cavities of the mold. (The cavities are the part of the mold shaped like the parts to be produced) By contrast, A hot runner system usually includes a heated manifold and a number of heated nozzles. The main task of the manifold is to distribute the plastic entering the mold to the various nozzles which then meter it precisely to the injection points in the cavities. |
|
|||
According to the characteristics of our own mold , Yichuan synthesized the technology from the top world hot runner makers and developed the suitable hothalf system for the mold on 2012. Characteristics: |
|
|||
There are many variations of hot runner
systems. Generally, hot runner systems are designated by how the plastic
is heated. There are internally and externally heated drops and manifolds.
|
|
|||
Externally heated hot runner channels
have the lowest pressure drop of any runner system (because there is no
heater obstructing flow and all the plastic is molten), and they are better
for color changes none of the plastic in the runner system freezes. There
are no places for material to hang up and degrade, so externally heated
systems are good for thermally sensitive materials.
|
|
|||
Internally heated runner systems require
higher molding pressures, and color changes are very difficult. There
are many places for material to hang up and degrade, so thermally sensitive
materials should not be used. Internally heated drops offer better gate
tip control. Internally heated systems also better separate runner heat
from the mold because an insulating frozen layer is formed against the
steel wall on the inside of the flow channels.
|
|
|||
A special type of hot runner system
is an insulated runner. An insulated runner is not heated; the
runner channels are extremely thick and stay molten during constant cycling.
This system is very inexpensive, and offers the flexible gating advantages
of other hot runners and the elimination of gates without the added cost
of the manifold and drops of a heated hot runner system. Color changes
are very easy. Unfortunately, these runner systems offer no control, and
only commodity plastics like PP and PE can be used. If the mold stops
cycling for some reason, the runner system will freeze and the mold has
to be split to remove it. Insulated runners are usually used to make low
tolerance parts like cups and frisbees.
|
|
|||
They can completely eliminate runner scrap,
so there are no runners to sort from the parts, and no runners to throw
away or regrind and remix into the original material. Hot runners are
popular in high production parts, especially with a lot of cavities. Advantages Hot Runner System Over a Cold Runner System include: no runners to disconnect from the molded parts no runners to remove or regrind, thus no need for process/ robotics to remove them having no runners reduces the possibility of contamination lower injection pressures lower clamping pressure consistent heat at processing temperature within the cavity cooling time is actually shorter (as there is no need for thicker, longer-cycle runners) shot size is reduced by runner weight cleaner molding process (no regrinding necessary) nozzle freeze and sprue sticking issues eliminated |
|
|||
Fast cycling due to specially designed cooling circuits. |
|
|||
Shorten the processing cycle, raises
the efficiency Replaces the cold runner, thus does not produce the crude material, does not need to crush again. Enhances the product uniformity, improves the product quality. Improves the gate outward appearance. Reduces the product aberration quantity, reduces the product distortion Uses the valve gate, injection molding step-by-step,produce different specification size the components series. Enhances the more processing process control, in order to make the precise adjustment to the injection molding. The hot runner system is composed generally by three parts: main feed inlet, hot divergence board, hot spray nozzle. Sometimes the system includes the cut-off valve, uses in closing the runner, improves the product surface quality, permits using the large gate. |
|
||||||||||||||
|
|
|
|
|||||||||||||||||
|
|
|
|
||||||||||||||
|
|
|
|
Related:hot runner system,hot runner mold |
Huangyan Yichuan Mold Factory
Copyright 2008-2020 www.capmold.com
All Rights Reserved. .
|
||||||||