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injection device

A technology of an injection device and a cylinder block, which is applied in the field of injection devices, can solve the problems of heat escape of the cylinder block, difficult transmission of the cylinder block, etc., and achieves the effect of good heating efficiency

Active Publication Date: 2016-08-24
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the heat of the cylinder body is easy to escape to the outside air, etc., and the heat of the cylinder body is difficult to transfer to the molding material in the cylinder body.

Method used

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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0020] figure 1 It is a figure which shows the injection apparatus of 1st Embodiment of this invention. exist figure 1 In, for the convenience of observing the drawings, omit figure 2 An illustration of the cover member 40 is shown. figure 2 Yes figure 1 Sectional view of the cylinder and screw. exist figure 2 In, for the convenience of observing the drawings, omit figure 1 A representation of the flight flight 15 of the screw 13 is shown. image 3 yes means figure 2 The graph of the eddy current during the induction heating of the cylinder and screw. exist image 3 The middle arrows indicate the flow of eddy currents. in addition, image 3 is an example where the direction of eddy currents reverses repeatedly over time.

[0021] The injection device 10 injects the resin melted in the cylinder 11 from the nozzle 12, and fills the cavity space in the mold device not shown. The mold device is composed of a fixed mold and a movable mold, and a cavity space is for...

no. 2 Embodiment approach

[0050] The injection device of the second embodiment is composed of the same components as the injection device of the above-mentioned first embodiment except for the cylinder. Below, refer to Figure 4 In the description of the injection device 110 according to this embodiment, the structure of the cylinder 111 will be mainly described, and components other than the cylinder 111 will be assigned the same reference numerals and their description will be omitted.

[0051] The cylinder 111 is divided into a plurality of zones Z11 to Z15 along the axial direction of the cylinder 111 and heated. The section Z11 closest to the cooling device 30 can be heated by the induction coil 21 . In addition, the heating positions and the number of the induction coils 21 are not particularly limited.

[0052] The cylinder 111 includes a cylinder main body 117 and a conductive layer 118 arranged inside the cylinder main body 117 . It is sufficient that the magnetic permeability μ1 of the con...

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Abstract

An injection device comprising a cylinder to be supplied with a molding material, and an induction heating portion for inductively heating the cylinder, wherein a hole penetrating the cylinder from an outer peripheral surface to an inner peripheral surface is formed on the induction heating portion of the cylinder. slit.

Description

technical field [0001] The invention relates to an injection device. Background technique [0002] The injection unit injects molten resin into the mold unit. The mold device is composed of a fixed mold and a movable mold, and a cavity space is formed between the fixed mold and the movable mold when the molds are closed. The resin cooled and solidified in the cavity space is taken out as a molded product after the mold is opened. [0003] The injection device includes a cylinder to which resin pellets are supplied as a molding material. The cylinder is heated by a heater from the outside, and the resin in the cylinder is melted. The molten resin is injected into the mold device from a nozzle formed at the front end of the cylinder. [0004] The heater is inexpensive and can be easily installed on the outer periphery of the cylinder. However, due to the contact thermal resistance between the heater and the cylinder, the heating efficiency of the cylinder is low, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C45/74
CPCB29C45/74
Inventor 吉田润
Owner SUMITOMO HEAVY IND LTD