Integrative system capable of controlling quick temperature change of injection mould

Abstract

The invention relates to a steam generating plant, in particular to a steam heating system capable of controlling quick temperature change of an injection mould. Specially, the modules, such as a steam boiler, a steam storage, a steam controller and the like are integrated so as to obtain a resin polymer injection moulding product with high quality appearance. The integrative system comprises a steam generating and transporting system, a cooling water delivery line, a compressed air cleaning passage, a guiding gas passage, a control unit 23, a programmable processor, an operator interface and a distribution box 7. The invention has the advantages that an electrical heating steam generator in the device of the invention can fully utilize the heat of condensate water in the steam storage and utilize the heat of system backwater to heat a heat exchanger in a water-replenishing tank so as to improve water temperature in the water-replenishing tank, thus greatly reducing energy consumption. For example, when the front frame of 47'' LCD TV is produced, the product of the invention can lower production energy consumption by 50% and properly shorten shaping period if compared with a large-volume boil steam generator.

Description

technical field [0001] The invention relates to a steam generating device, especially an integrated system for controlling the rapid temperature change of an injection mold. Specifically, it achieves the integration of modules such as a steam boiler, a steam storage and a steam controller, so as to obtain high-quality resin Polymer injection molding products. Background technique [0002] When injection molding plastic products with high-quality appearance, it is a common process method to control the rapid change of mold temperature. Due to the unique thermodynamic characteristics of steam, easy implementation, and stable process control, the use of steam as a heating medium is the most common. For example, the Chinese patent ZL200720075904.6 publicly authorized on December 24, 2008 discloses a device for controlling the temperature change of the injection mold developed to obtain high-quality appearance injection molded parts. It is developed for customers of boilers. Th...

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Problems solved by technology

For example, the Chinese patent ZL200720075904.6 publicly authorized on December 24, 2008 discloses a device for controlling the temperature change of the injection mold developed to obtain high-quality appearance injection molded parts. It is developed for customers of boilers. The device requires users to have large-scale steam boilers, steam storage devices and steam pipelines. The problems in practice are: First, large and medium-sized oil-fired gas-fired boilers require special boiler rooms. The site is far away, and generally a very long steam pipeline is required to connect the steam to the steam controller, so that the energy consumption caused by the heat dissipation of the pipeline is inevitable; secondly, due to the inevitable heat dissipation of the steam storage device and the Condensed water is formed in the condensed water, and the condensed water can only be regularly removed through the blowdown valve, taking away a large amount of heat, and cannot be recycled; third, when the steam is used for process control, the steam that passes through the mold is not recovered. It is directly drained or mixed with cooling water, resulting in a great waste of energy; Fourth, the steam produced by a large steam boiler can be provided to multiple injection molds through multiple steam controllers

However, if only one pair of injection molds is produced, a large steam boiler must also be turned on, which not only increases the operating cost, but also inevitably increases energy consumption; fifth, the procedures for installing a large steam boiler are complicated and there are many restrictions in use , causing user inconvenience

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