JPH0121769Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a two-shaft continuous kneading machine with an improved material discharge structure.

(Prior Art) A conventional twin-screw continuous kneading machine is configured to have an orifice in the discharge section and discharge the kneaded material from the orifice.

(Problem that the invention aims to solve) However, according to this conventional kneading machine, the temperature of the material tends to rise due to the flow resistance of the orifice, so it is difficult to mix materials like rubber or thermosetting resin. It has become difficult to apply this method to materials that undergo chemical changes.

On the other hand, in order to improve the material discharge performance, a kneading machine was considered in which a screw blade is provided at the rear of the throttle in the discharge section, and the material discharge is promoted by the rotation of the screw blade.
Even with this, it is necessary to provide a cylinder wall around the screw shaft in order for the screw blades to work effectively, and heat generation occurs due to the friction of the material between the screw blades and the cylinder wall. It was not a good solution.

Therefore, the present invention provides a two-screw continuous kneader that can efficiently discharge kneaded materials without generating heat.

(Means for Solving the Problems) The two-screw continuous kneading machine of the present invention has a material supply section for supplying materials, a material kneading section for kneading the materials, and a material discharge section for discharging the kneaded materials. A two-shaft rotor is provided in the main body, and the rotor extends to the end of the rotor on the material discharge section side with a shaft section located in the same discharge section. A discharge blade for knocking off the kneaded material discharged from the part to the material discharge part from the outer periphery of the shaft part is provided protruding parallel to the axis of the shaft part, and a scraper is provided close to the rotation locus of the tip of this discharge blade. This is what happens.

(Function) With this configuration, the kneaded material discharged to the outer periphery of the shaft, which is an extension of the rotor, is knocked off by the discharge blades, and the material that has adhered or accumulated near the discharge blades is scraped off by the scraper. Therefore, material discharge efficiency is improved. Furthermore, since there is no cause of heat generation in the material such as flow resistance or friction, there is no risk of the temperature of the material increasing.

(Example) An embodiment of the present invention will be described with reference to the drawings.

Reference numeral 1 denotes a kneading machine main body, which has a hopper 11 as a material supply section to which materials are supplied, a material kneading section 12 that kneads the supplied materials, and a material discharge section 13 that discharges the kneaded materials, and Material kneading section 12
A gate 14 for adjusting the degree of kneading is provided at the boundary between the material discharge portion 13 and the material discharge portion 13, the opening degree of which can be adjusted by a pair of upper and lower movable plates 14a and 14b.

Reference numerals 2 and 2 denote two-shaft rotors arranged in parallel within the main body 1, each of which has a feed section 21 and a kneading section 22 corresponding to the hopper 11 and material kneading section 12 of the main body 1. Both rotors 2, 2 have a round shaft portion 2 at the end on the material discharge portion 13 side.
3 is positioned in the material discharge section 13 and extends integrally, and one or more discharge vanes 24 (the figure shows two in a symmetrical arrangement) are installed on the outer peripheral surface of the shaft section 23. It is provided in a protruding manner parallel to the axis of the portion 23.

Reference numerals 3 and 3 denote scrapers, and the tips 31, 31 are formed into a sharp plate shape, and these tips 31, 3
1 are disposed in a V-shape in the material discharge portion 13 in a state close to the rotation locus of the tips of discharge vanes 24, 24 provided on the shaft portions 23, 23 of the rotors 2, 2.

In this configuration, the material input from the hopper 11 is kneaded in the material kneading section 12 by the rotation of the rotors 2, 2, and then is discharged from the material discharging section 13 through the gate 14.

In this case, the material discharge part 1 passes through the gate 14.
Most of the kneaded material 5 that has entered 3 (outer circumferential portion of the shaft portion 23) is knocked off the outer circumference of the shaft portion by the rotating discharge blades 24, 24, and is not knocked off and is removed from the shaft portion near the discharge blades. The material adhering to and staying on the outer periphery is scraped off by the scraper 3 and peeled off from the outer periphery of the shaft portion.

In this way, the kneaded material 5 is discharged from the outer periphery of the shaft portion by the knocking-off action by the discharge blades and the scraping-off action by the scrapers 3, 3.

(Effect of the invention) As described above, when using the two-shaft continuous kneading machine of the invention, the shaft part is extended to the side end of the material discharge part of the rotor, and the discharge blades are installed on the outer peripheral surface of this shaft part. By protruding parallel to the shaft center and providing a scraper close to the rotating locus of the tip of this discharge blade, the kneaded material is knocked off by the discharge blade, and the scraper is scraped off from the material that adheres to the outer circumferential surface of the shaft without being knocked off. Since the material is scraped off with a scraper and then discharged, the material can be efficiently discharged. Furthermore, since there are no causes of heat generation such as flow resistance or friction, there is no risk of the temperature of the material rising. Therefore, not only the kneading characteristics are stabilized, but it is also possible to continuously knead materials that undergo chemical changes due to temperature rise, such as rubber and thermosetting resin, which was difficult with conventional machines.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view showing an embodiment of the present invention;
The figure is an enlarged sectional view taken along the line of FIG. 1. DESCRIPTION OF SYMBOLS 1... Kneading machine main body, 11... Hopper as a material supply part, 12... Material kneading part, 13... Material discharge part, 2, 2... Rotor, 23, 23... Shaft part, 24... Discharge Wings, 3, 3...scraper.

Claims (1)

[Scope of utility model registration request] Two rotors 2, 2 are provided in the kneading machine main body 1, which has a material supply section 11 to which materials are supplied, a material kneading section 12 to knead the materials, and a material discharge section 13 to discharge the kneaded materials. Shaft portions 23, 23 are provided at the ends of the material discharge portions 13 in 2, 2.
is extended to be located in the discharge section 13, and the kneaded material discharged from the material kneading section 12 to the material discharge section 13 is knocked off from the outer circumference of the shaft section on the outer peripheral surface of the shaft sections 23, 23. A two-shaft continuous system characterized in that the discharge blades 24, 24 are provided protrudingly parallel to the axis of the shaft portion, and the scrapers 3, 3 are provided close to the tip rotation locus of the discharge blades 24, 24. Type kneading machine.