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Rubber extruder and screw for same

A rubber extruder and screw technology, applied in mixers, mixer accessories, mixers with rotary stirring devices, etc., can solve the problems of gasification of volatile components, poor performance, damage and other problems

Inactive Publication Date: 2019-12-20
SUMITOMO RUBBER IND LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a large amount of volatile components remain in the unvulcanized rubber, there is a problem that when the unvulcanized rubber discharged from the rubber extruder is vulcanized and molded, the volatile components are vaporized and a large number of bubbles are generated, resulting in poor performance or damage to the final product reason for waiting

Method used

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  • Rubber extruder and screw for same
  • Rubber extruder and screw for same
  • Rubber extruder and screw for same

Examples

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Embodiment Construction

[0031] Hereinafter, one embodiment of the present invention will be described based on the drawings.

[0032] figure 1 It is a sectional view showing the rubber extruder 1 of this embodiment. Such as figure 1 As shown, the rubber extruder 1 of the present embodiment extrudes the unvulcanized rubber G from the upstream side A toward the downstream side B while stirring the unvulcanized rubber G. Preferably, the rubber extruder 1 includes: a substantially cylindrical body 2 ; a screw 3 disposed in the body 2 ; and an exhaust hole 4 for sucking air in the body 2 .

[0033] The cylinder body 2 has, for example, a substantially constant inner diameter d from the upstream side A toward the downstream side B in the extrusion direction of the unvulcanized rubber G. It is preferable that the cylindrical body 2 has an inlet 5 for injecting the unvulcanized rubber G in the peripheral portion on the upstream side A. As shown in FIG. In addition, it is preferable that the cylindrical b...

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Abstract

Provided is a rubber extruder which can efficiently remove a volatile component in unvulcanized rubber without decreasing the productivity of the unvulcanized rubber. This rubber extruder for extruding unvulcanized rubber G while kneading the unvulcanized rubber includes: a barrel 2 having an input port 5 for inputting unvulcanized rubber G and a discharge port 6 for discharging the unvulcanized rubber G; a screw 3 which is disposed inside the barrel 2 and is for extruding the unvulcanized rubber G; and a vent 4 for suctioning air inside the barrel 2. The screw 3 has: a dam part 7 which locally restricts the extruded amount of unvulcanized tuber G; a first screw part 8 extending from the input port 5 to the dam part 7; and a second screw part 9 extending from the dam part 7 to the discharge port 6. The effective screw length L1 of the first screw part 8 is at least 50% of the total effective screw length L of the screw 3.

Description

technical field [0001] The present invention relates to a rubber extruder and a screw for extruding unvulcanized rubber while stirring the unvulcanized rubber. Background technique [0002] A rubber extruder having a screw is known as a rubber extruder for extruding the unvulcanized rubber while stirring the unvulcanized rubber. In a conventional rubber extruder having a screw, the unvulcanized rubber input from the input port is stirred by the screw, and the unvulcanized rubber is discharged from the discharge port. [0003] Usually contains volatile components in unvulcanized rubber. If a large amount of volatile components remain in the unvulcanized rubber, there is a problem that when the unvulcanized rubber discharged from the rubber extruder is vulcanized and molded, the volatile components are vaporized and a large number of bubbles are generated, resulting in poor performance or damage to the final product and so on. [0004] Therefore, in the following Patent Doc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C48/625B29C48/76B29K21/00B29C48/535B29C48/58
CPCB29B7/7495B29B7/845B29B7/86B29B7/429B29C48/767B29C48/58B29C48/535B29C48/505B29C48/76B01F2215/0431B01F27/191B01F27/724B01F27/1143B01F35/189B01F2101/2805
Inventor 田中智大中村吉伸坂本雅之佐藤忠资大田隆介竹内秀明道林正明野田诚
Owner SUMITOMO RUBBER IND LTD
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