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Mold hot nozzle heat insulation device and injection mold

A technology of heat insulation device and injection mold, applied in the field of mold, can solve the problems of thermal expansion of template, affecting product quality and qualification rate, affecting mold accuracy, etc., to improve precision, reduce cracking and demoulding difficulties, and improve service life. Effect

Pending Publication Date: 2021-04-30
KUNSHAN ESON PRECISION ENGINEERING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The hot runner is to ensure that the plastic in the runner and the gate remains in a molten state by heating. The hot runner system generally consists of several parts such as a hot nozzle and a manifold. Since there are heating rods and heating rings near or in the center of the runner, The entire runner from the nozzle outlet of the injection molding machine to the gate is in a high temperature state, which keeps the plastic in the runner in a molten state, but the high temperature of the hot nozzle makes the heat conduction to the template, which will cause thermal expansion of the template and affect the mold. The accuracy of the product makes the product unusable and affects the quality and pass rate of the product.
[0003] Since the form of the hot nozzle directly determines the selection of the hot runner system and the manufacture of the mold, in the prior art, the common hot runner system is only provided with a heat insulation sleeve on the head of the hot nozzle. The generated heat is conducted to the template, therefore, there is an urgent need for a mold hot nozzle heat insulation device and an injection mold that can reduce the heat conduction of the hot nozzle to the template, so as to solve the above-mentioned technical problems in the prior art

Method used

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  • Mold hot nozzle heat insulation device and injection mold
  • Mold hot nozzle heat insulation device and injection mold
  • Mold hot nozzle heat insulation device and injection mold

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Embodiment 1

[0027] The invention provides a heat insulation device comprising a mold hot nozzle, see Figure 1 to Figure 4 , including a heat insulation sleeve 3 and a circulating cooling system 4, the heat insulation sleeve 3 is fixed in the mold 1, and the mold 1 includes a cylinder plate 11, a splitter plate 12 and a master template 13 arranged in sequence from top to bottom, the said A hot runner system 14 is provided on the distributor plate 12 , and the hot runner system 14 is used for heating the nozzle 2 . The height of the heat insulation cover 3 is lower than the height of the hot nozzle 2 to increase the heat exchange area between the cooling water and the hot nozzle 2. At the same time, the heat insulation cover 3 does not hinder the normal operation of the hot nozzle 2. The thermal sleeve 3 is sleeved on the outer periphery of the hot nozzle 2 . Wherein, the circulating cooling system 4 includes a flow guide pipe 41 and a cooling pipe 42, the cooling pipe 42 is arranged in t...

Embodiment 2

[0032] The present invention also provides an injection mold 1, see figure 1 , figure 2 , the injection mold includes the mold hot nozzle thermal insulation device described in Embodiment 1. It should be noted that the hot nozzle 2 is a runner structure with heating wires arranged inside. Specifically, the inside of the hot nozzle 2 is covered with heating wires. When the hot runner system 14 heats the hot nozzle 2, the heat The nozzle 2 can heat up quickly, and the heated nozzle 2 can melt the plastic particles, so that the melted plastic liquid can flow into the core of the master mold through the bottom of the nozzle 2, and finally the product 9 is obtained.

[0033] When the temperature of the hot nozzle 2 is too high, the heat of the hot nozzle 2 is easily transferred to the mold 1, causing thermal expansion of the mold 1, which in turn causes the thermal expansion of the mold 1 to crack, and the resulting product 9 is also prone to difficulties in demoulding. Therefor...

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Abstract

The invention discloses a mold hot nozzle heat insulation device and an injection mold. The device comprises a heat insulation sleeve and a circulating cooling system, the heat insulation sleeve is fixed in the mold and arranged at the periphery of a hot nozzle in a sleeving manner, the circulating cooling system comprises a flow guide pipe and a cooling pipe, and the cooling pipe is arranged in the heat insulation sleeve; and the cooling pipe is communicated with an external cooling liquid circulating system through the flow guide pipe. Heat conducted to the mold from the hot nozzle can be reduced, so that the phenomena that the mold cracks and is difficult to demold due to thermal expansion are reduced, and the precision of the mold is improved.

Description

technical field [0001] The invention relates to the technical field of molds, in particular to a thermal insulation device for a mold hot nozzle and an injection mold. Background technique [0002] The hot runner is to ensure that the plastic in the runner and the gate remains in a molten state by heating. The hot runner system generally consists of several parts such as a hot nozzle and a manifold. Since there are heating rods and heating rings near or in the center of the runner, The entire runner from the nozzle outlet of the injection molding machine to the gate is in a high temperature state, which keeps the plastic in the runner in a molten state, but the high temperature of the hot nozzle makes the heat conduction to the template, which will cause thermal expansion of the template and affect the mold. The precision makes the products produced unusable and affects the quality and qualification rate of the products. [0003] Since the form of the hot nozzle directly de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/27
CPCB29C45/27B29C45/2737B29C2045/2743B29C2045/2753B29C2045/2766
Inventor 朱邦友
Owner KUNSHAN ESON PRECISION ENGINEERING CO LTD
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