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Forming machine and its temperature controlling method

A temperature control method and molding machine technology, applied in the field of heating devices, can solve problems such as poor thermal efficiency, excessive or insufficient thermal efficiency, and difficulty in temperature control, and achieve the effects of preventing deterioration, reducing costs, and achieving good thermal efficiency.

Inactive Publication Date: 2007-01-24
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But, because the heating of the heating cylinder realized by the annular electric heaters 151-1~151-4 is the heating realized by heat conduction, there is a relatively low thermal efficiency. bad question
Moreover, since the temperature control is performed by changing the opening and closing of the switching device, that is, changing the duty cycle of the power supply on and off, it is difficult to perform precise temperature control, and there is a problem that excessive or insufficient

Method used

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  • Forming machine and its temperature controlling method
  • Forming machine and its temperature controlling method
  • Forming machine and its temperature controlling method

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Embodiment Construction

[0044] First, refer to figure 2 An example of an injection molding machine to which the present invention is applied will be described. figure 2 It is a side view showing the overall configuration of an electric injection molding machine as an example of an injection molding machine to which the present invention is applied.

[0045] figure 2 The illustrated electric injection molding machine 10 is composed of an injection device 50 and a mold clamping device 70 .

[0046]The injection device 50 includes a heating cylinder, and a hopper 52 is provided on the heating cylinder 51 . A screw 53 is provided in the heating cylinder so as to be able to advance, retreat, and rotate freely. The rear end of the screw 53 is rotatably supported by a support member 54 . A measuring motor 55 such as a servo motor is attached to the support member 54 as a drive unit. The rotation of the metering motor 55 is transmitted to the screw 53 of the driven part via the timing belt 56 attache...

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Abstract

A forming machine (10) comprising a means for heating a heating cylinder (51) by induction heating. The induction heating means comprises a plurality of induction heating coils (112-1 to 112-4) arranged in the heating cylinder (51), and a plurality of power supply control sections for controlling power being supplied to these coils. The power supply control sections comprise heating section control inverters (114-1 to 114-4) being supplied with power from a DC power supply circuit (40), respectively. Each heating section control inverter performs frequency control or current control of power being supplied.

Description

technical field [0001] The present invention relates to a molding machine, and more particularly to a molding machine equipped with an induction heating device with good thermal efficiency as a heating device for a portion requiring heating, such as a heating cylinder and a mold, and a temperature control method thereof. Background technique [0002] As heating devices for injection molding machines and extrusion molding machines (hereinafter, these are collectively referred to as molding machines), an endless belt-shaped electric heater is generally used. Such as figure 1 As shown, the heating cylinder 150 is divided into a plurality of sections along the axial direction (in figure 1 , four sections are shown in the figure), and the annular belt-shaped electric heaters 151-1 to 151-4 are respectively arranged in each section. The endless belt-shaped electric heaters 151-1 to 151-4 are arranged so as to wrap around the heating cylinder, and are connected to the power suppl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/76B29C45/74B29C48/92
CPCB29C2945/76528B29C2945/76531B29C2945/76668B29C45/78B29C2945/76525B29C47/92B29C2945/7604B29C45/74B29C2945/76518B29C45/7666B29C48/92B29C2948/92209B29C2948/924B29C2948/92704B29C48/9185B29C2948/92542B29C2948/92552B29C2948/92895B29C2948/92952B29C45/72
Inventor 大西祐史
Owner SUMITOMO HEAVY IND LTD