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Micro-nano injection molding mold cavity heating system and heating method thereof

An injection molding and heating system technology, applied in the field of polymer molding, can solve the problems of inaccurate cavity temperature control and large heat loss, and achieve the effects of improving friction heat generation efficiency, increasing shear friction, and avoiding temperature rise

Active Publication Date: 2019-08-16
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems that the existing micro-nano injection molding mold heating technology adopts the way of overall heating of the mold, the heat loss is large, and there is inaccurate cavity temperature control, and provides a micro-nano injection molding mold cavity heating system and its heating method

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  • Micro-nano injection molding mold cavity heating system and heating method thereof

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specific Embodiment approach 1

[0027] Specific Embodiment 1: In this embodiment, a micro-nano injection molding mold cavity heating system includes an air compressor 1, a filter 2, a water separator 3, an air dryer 4, an air storage tank 5, a ball valve 6, and a heater 7. Mold insert with holes 8, cooler 9; wherein, the air compressor 1 communicates with the air inlet of the filter 2, the air outlet of the filter 2 communicates with the air inlet of the water separator 3, and the air outlet of the water separator 3 It is connected with the air inlet of the air dryer 4, the air outlet of the air dryer 4 is connected with the air inlet of the air storage tank 5, the air outlet of the air storage tank 5 is connected with the air inlet of the heater 7, and the connection between the air storage tank 5 and the heater 7 A ball valve 6 is arranged between them, and the air outlet of the heater 7 communicates with the air inlet of the mold insert 8 with holes, and the air outlet of the mold insert 8 with holes commu...

specific Embodiment approach 2

[0029] Specific embodiment two: the difference between this embodiment and specific embodiment one is: when the mold insert 8 with holes has multiple through holes, the multiple through holes are arranged in a single row, parallel to the bottom edge of the mold insert, and the hole spacing is 3~5mm. Others are the same as in the first embodiment.

[0030] In this embodiment, a plurality of through holes are provided to further realize uniform heating of the mold cavity and improve the heating effect.

specific Embodiment approach 3

[0031] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the through hole is 6-10 mm away from the bottom of the mold cavity. Others are the same as in the first or second embodiment.

[0032] In this embodiment, the distance between the through hole and the bottom of the mold cavity is 6-10 mm, so as to ensure that the rigidity and strength of the mold insert meet the molding requirements when the melt is filling the mold.

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Abstract

The invention discloses to a micro-nano injection molding mold cavity heating system and a heating method thereof, and belongs to the technical field of polymer molding. The invention aims to solve the technical problems that an overall heating mode of the mold is adopted according to an existing micro-nano injection mold heating technology which leads to large heat loss and the temperature control of the cavity is not accurate. The system comprises an air compressor, a filter, a water separator, an air dryer, a gas storage tank, a ball valve, a heater, a mold insert with holes and a cooler, wherein an air outlet of the heater communicates with an air inlet of the mold insert with the holes, and the air outlet of the mold insert with the holes communicates with an air inlet of the cooler.The method comprises the following steps of preheating the mold insert by using a heated gas, allowing high-pressure air flow to penetrate through a through hole of the bottom of a mold cavity insert,and heating the mold cavity. According to the micro-nano injection molding mold cavity heating system and the heating method thereof, the temperature of the mold cavity is controlled to keep constantby adjusting the gas pressure; the high-speed airflow is used to generate shearing friction heat, and the mold is partially heated, thus achieving the purpose of energy conservation. The system is used for heating a mold cavity.

Description

technical field [0001] The invention relates to the technical field of polymer molding. Background technique [0002] With the rapid development of micro-nano technology, micro-nano injection molding is one of the most promising polymer micro / nano device manufacturing technologies. During micro-nano injection molding of polymer melt, the heat of the melt is easily lost due to the large surface-to-body ratio of the cavity. In order to ensure the quality of mold filling, it is usually necessary to heat the mold to a certain temperature. This temperature is higher than that of traditional injection molds. The micro-nano cavity is usually made into an insert and installed on the mold base, which is characterized by its small size and small heating area. At present, the existing micro-nano injection mold heating technology adopts the method of overall heating of the mold, which has a large heat loss and has the technical problem of inaccurate cavity temperature control. Conte...

Claims

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Application Information

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IPC IPC(8): B29C45/73B29C45/78
CPCB29C45/7337B29C45/78B29C2945/76531
Inventor 徐斌李光明薛松
Owner SOUTHWEAT UNIV OF SCI & TECH
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