Needle valve type hot runner system
A needle valve type hot runner and the technology of this system are applied in the field of needle valve type hot runner systems, which can solve the problems of short service life, complex structure, easy side leakage or overflow of molten plastic materials, etc., so as to reduce the temperature and prolong the service life. , to avoid side leakage or overflow effect
Active Publication Date: 2016-06-01
INGLASS TOOLING & HOT RUNNER MFG CHINA
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Problems solved by technology
[0004] The above-mentioned scheme has improved some problems of the prior art to a certain extent, but at least the following defects exist in this scheme: the structure is relatively complicated, the cooling effect of the system, especially the cooling effect of the needle valve guide sleeve is not ideal, and the molten plastic Material remains prone to side leakage or spillage
On the other hand, it is easy to cause a short service life due to wear
Method used
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[0025] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.
[0026] Such as Figure 1-7 As shown, a needle valve hot runner system includes a diverter plate 3, on which a valve needle guide sleeve 7 and a nozzle 8 opposite to each other are fixed, and a valve needle 10 passes through the valve needle guide sleeve 7 and the nozzle. 8, and one end of the valve needle 10 passes through the valve needle guide sleeve 7 and is connected with the valve needle driver 11 capable of driving the valve needle 10 to move back and forth along the axial direction. The valve needle guide sleeve 7 is sleeved with a cylinder Shaped insert main body 1, said insert main body 1 is provided with at least one heat conduction wing plate 2 capable of contacting with the valve needle driver 11. The heat conduction fin 2 becomes the solid medium for heat transfer, so the heat conduction fin 2 is made of a material with ...
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The invention belongs to the technical field of hot runner injection molding, and particularly relates to a needle valve type hot runner system. The technical problem that fusion plastic materials in a needle valve overflow in the prior art is solved. The needle valve type hot runner system comprises a splitter plate. A valve needle guide sleeve and a nozzle which are arranged oppositely are fixedly arranged on the splitter plate. A valve needle is arranged in the valve needle guide sleeve and the nozzle in a penetrating manner, and one end of the valve needle penetrates out of the valve needle guide sleeve and is connected with a valve needle driver capable of driving the valve needle to do front-back reciprocating motion in the axial direction. The valve needle guide sleeve is sleeved with a barrel-shaped insert body. At least one heat conduction wing plate capable of being in contact with the valve needle driver is arranged on the insert body. Compared with the prior art, the needle valve type hot runner system has the beneficial effects that heat transfer is formed between the needle valve guide sleeve and a piston driver, and therefore the temperature of the valve needle guide sleeve is effectively reduced, the viscidity of the fusion plastic materials is increased, protection layers are formed on the side wall of the valve needle and the side wall of the valve needle guide sleeve, plastic leakage is effectively avoided, and the service life of the valve needle and the service life of the valve needle guide sleeve are prolonged.
Description
technical field [0001] The invention belongs to the technical field of hot runner injection molding, and in particular relates to a needle valve type hot runner system. Background technique [0002] In the existing hot runner injection molding technology, needle valves are generally used to inject molten plastic materials, and the needle valve structure in the prior art includes a valve needle, a valve needle guide sleeve for guiding the valve needle to move axially, and a valve needle driver. After the molten plastic material is introduced, the temperature of the entire needle valve increases. Due to thermal expansion, a small gap will be formed between the valve needle guide sleeve and the valve needle at high temperature, and the molten plastic material may overflow from the gap. Usually, the way to prevent the overflow of molten plastic material is to reduce the gap between the valve needle and the valve needle guide sleeve during processing, and the gap must be less tha...
Claims
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IPC IPC(8): B29C45/28
CPCB29C45/2806
Inventor 巴佐
Owner INGLASS TOOLING & HOT RUNNER MFG CHINA