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Extrusion molded article

A technology of extrusion molding and extrusion direction, which is applied in the direction of catalyst carrier, dispersed particle separation, grinding/polishing equipment, etc., can solve the problems of easy cracking and cracking, and achieve the effects of cracking resistance, cracking reduction and strength improvement

Inactive Publication Date: 2010-05-26
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if fibers are dispersed in a molded product produced by extrusion molding, there is still a problem that it is easy to break when an impact such as being thrown on the ground is applied, especially in the case of a cylindrical or cylindrical molded product. prone to fracture along its axis

Method used

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  • Extrusion molded article

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] use figure 1 , figure 2 The extrusion molding apparatus shown extrudes a clay-like alumina catalyst molding material to manufacture its molded product. The alumina molding material contained 6 parts by weight of alumina fibers having an average fiber length of 0.4 mm and 38 parts by weight of water relative to 100 parts by weight of the catalyst.

[0055] The used die 1 has a chrome-plated surface and has a disc shape in which eight extrusion holes 2 are concentrically arranged. The inner diameter of the extrusion hole 2 is 6.6 mm, and the length is 10 mm.

[0056] A pin 5 with an inner diameter of 2.5 mm and a length of 22 mm is inserted into the extrusion hole 2 . like figure 1 As shown, the rear ends of the three metal wires are fixed on the pin 5, wound on the pin 5 obliquely, and the front ends are slightly tilted from the pin 5.

[0057] Using this extrusion molding apparatus, the above-mentioned alumina catalyst molding material was extrusion-molded at an e...

Embodiment 2

[0059] In addition to using image 3 pin 51 shown in place of the figure 1 Extrusion molding was carried out in the same manner as in Example 1 except for the pin 5 shown. However, the number of wires 26 fitted in the through holes of the pins 51 is two, and the intersection angle of the two wires 26 is 90°.

Embodiment 3

[0061] In addition to using Figure 4 pin 52 shown in place of the figure 1 Extrusion molding was carried out in the same manner as in Example 1 except for the pin 5 shown. However, the number of cross-shaped rings 28 is one.

[0062] [Comparative example]

[0063] Extrusion molding was carried out in the same manner as in Example 1, except that a pin without protrusions was used.

[0064] The strength of the molded articles obtained in the above-mentioned Examples and Comparative Examples was investigated by the following drop test and compressive strength test.

[0065] 〔Compressive strength test〕

[0066] When a pressure is applied along the thickness direction (radial direction) of a molded product with a cutting length of 6.6 mm, the pressure at which the molded product breaks is measured, and this value is taken as the compressive strength.

[0067] 〔Drop strength test〕

[0068] Put the molded product with a cut length of 6.6mm in an environment of 25°C and 80%RH, ...

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Abstract

The invention provides an extrusion molding apparatus capable of improving strength of a molded article. The extrusion molding apparatus continuously extrudes a molding material containing a reinforcing fiber from an extruding hole 2 of a die 1 to mold the molding material into the molded article, and a stirring means for stirring the molding material is provided in the extruding hole 2 or in the die 1 in the vicinity of the extruding hole 2. As the stirring means, a wire 7 or the like provided on the outer periphery of a pin 5 positioned in the extruding hole 2 or in the die 1 in its vicinity and rotating is used. The molding material is molded by this extrusion molding apparatus to manufacture the molded article.

Description

[0001] This application is a divisional application of an earlier application (application date: March 3, 2006, application number: 200610055081.0, title of invention: extrusion molding device, manufacturing method of molded products, and extrusion molded products). technical field [0002] The present invention relates to an extrusion molding device capable of producing a molded product with improved mechanical strength, a method for manufacturing a molded product using the device, and an extrusion molded product with improved mechanical strength. Background technique [0003] Generally, the catalyst, catalyst carrier, adsorbent, desiccant, humidity control agent, etc. are formed into cylindrical or cylindrical shaped products with a diameter of 2 to 10 mm and a length of 2 to 20 mm, which are filled into the reactor and Used in various chemical reactions. In order to manufacture molded products such as catalysts, extrusion molding has been used until now. [0004] That is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J35/06B01J32/00B01D53/28B29C47/00B29K105/06B29C48/30B29C48/67
CPCB24B31/02B24B31/12
Inventor 野村好三郎山西修土本和也
Owner SUMITOMO CHEM CO LTD
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