JPH0636806U - Closed kneader - Google Patents

Abstract

(57) [Abstract] [Purpose] For a closed type kneading machine having a gap between the end surface 1a of the land 1 and the inner wall surface of the kneading tank, the kneading material that has entered the gap is prevented from reaching the outer circumference of the shaft. , Or at least reduce its amount. [Structure] A spiral groove 8 or a protrusion is provided on the end surface 1a or the inner wall surface to return the kneaded material that has entered the gap to the outer peripheral side of the gap as the land 1 rotates.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of a closed kneader.

[0002]

[Prior art]

 In the closed type kneader as shown in FIG. 10 or FIG. 11, there is a gap 3 of several mm in actual size between the end face 1 a of the land 1 and the inner wall surface 2 a of the kneading tank 2, and the gap 3 has entered. There is a possibility that the kneading material 4 may leak along the outer periphery of the shaft 5 to the outside of the kneading tank 2. Therefore, conventionally, in order to prevent the kneaded material 4 from leaking, a seal 6 such as a gland packing is attached to the outer periphery of the shaft 5. The land 1 is provided at the base of the blade 7 in order to apply a shearing force to the kneading material 4 and to knead the kneading material 4, and as shown in FIG. It has an annular end surface 1a.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned prior art, since the leakage of the kneading material 4 is biased to the reliance on the seal 6 such as a gland packing, the sealing performance tends to be insufficient, and a part of the kneading material 4 does not seal the seal 6. There is a problem of passing through and leaking. Further, since the seal 6 has a large burden, there is a problem that the seal 6 deteriorates early.

[0004]

[Means for Solving the Problems]

 In view of the above points, the present invention has been devised to solve the above-mentioned problems in the prior art, and in order to achieve this object, a gap is formed between the end surface of the land and the inner wall surface of the kneading tank. In a certain closed type kneading machine, a spiral groove or a protrusion is provided on the end face or the inner wall surface to return the kneading material that has entered the gap to the outer peripheral side of the gap as the land rotates.

[0005]

[Action]

 A kneading material such as rubber or resin has a large viscosity, and this viscosity is used to send the kneading material back to the outer peripheral side of the gap by the spiral groove or protrusion.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to the drawings. In the kneading machine, as shown in FIG. 1, a large number of spiral grooves 8 are provided radially on an end face 1a of a land 1 around an axis. Each groove 8 has a circular arc shape and is curved in a direction opposite to the rotation direction A of the land 1 as it approaches the outer peripheral end. As shown in FIG. 2, each groove 8 is formed in a rectangular shape (a in the figure), a semicircular shape (b) in the figure, or a triangular shape (c) in the figure.

In the kneading machine having the above-mentioned structure, when the kneading material 4 enters the gap 3 between the end surface 1 a of the land 1 and the inner wall surface 2 a of the kneading tank 2, a part of the kneading material 4 enters the groove 8. The kneading material 4 moves in the outer peripheral direction in the groove 8 by viscous action accompanying the rotation of the land 1, and the kneading material 4 not directly caught in the groove 8 also moves in the outer peripheral direction together with being dragged. Therefore, according to the kneading machine, it is possible to prevent the kneading material 4 that has entered the gap 3 from reaching the outer periphery of the shaft 5, or at least reduce the amount of the kneading material 4 from the conventional one. Can help.

The kneading machine can be modified in its configuration as follows. In place of the groove 8, a large number of spiral protrusions 9 are provided radially on the end face 1a of the land 1 with the axis as the center. Each of the protrusions 9 has an arc shape, and the protrusions 9 are curved toward the side opposite to the rotation direction A of the land 1 as the protrusions 9 are closer to the outer peripheral end. Further, as shown in FIG. 3, the cross-sectional shape of each protrusion 9 is a rectangle (a in the figure), a semicircle (b) in the figure, or a triangle (c) in the figure. As shown in FIG. 4, the width of each groove 8 or each projection 9 is increased as it approaches the outer peripheral edge. The cross-sectional shape of each groove 8 is as shown in FIGS. 5A, 5B and 5C in the vicinity of the outer peripheral end, and the cross-sectional shape of each protrusion 9 is as shown in FIG. As shown in FIG. 7, each groove 8 or each protrusion 9 has a linear shape bent in the middle. The bending direction is opposite to the rotation direction A of the land 1. As shown in FIG. 8, each groove 8 or each protrusion 9 has a straight line shape without bending. As shown in FIG. 9, the groove 8 or the protrusion 9 is provided on the inner wall surface 2 a of the kneading tank 2 instead of being provided on the end surface 1 a of the land 1.

[0009]

[Effect of device]

 The present invention has the following effects. That is, since the kneading material that has entered the gap between the land and the inner wall surface of the kneading tank is fed back to the outer periphery of the gap as the land rotates, a spiral groove or protrusion is provided, so that it enters the gap. The kneaded material can be prevented from reaching the outer circumference of the shaft, or at least the amount thereof can be reduced as compared with the prior art, and the sealing effect on the kneaded material can be enhanced accordingly.

[Brief description of drawings]

FIG. 1 is an end view of a main part of a closed kneading machine according to an embodiment of the present invention.

FIG. 2 is a sectional view of a groove in each of a, b, and c.

FIG. 3 is a cross-sectional view of protrusions of a, b, and c.

FIG. 4 is an end view of a main part of a closed kneading machine according to another embodiment of the present invention.

FIG. 5 is a sectional view of the groove in each of a, b, and c.

FIG. 6 is a cross-sectional view of protrusions for a, b, and c.

FIG. 7 is an end view of a main part of a closed kneading machine according to another embodiment of the present invention.

FIG. 8 is an end view of a main part of a closed kneading machine according to another embodiment of the present invention.

FIG. 9 is an internal view of a main part of a closed kneading machine according to another embodiment of the present invention.

FIG. 10 is a sectional view of a hermetic kneading machine according to a conventional example.

FIG. 11 is a sectional view of a hermetic kneading machine according to a conventional example.

[Explanation of symbols]

 1 Land 1a End face 2 Kneading tank 2a Inner wall surface 3 Gap 4 Kneading material 5 Shaft 6 Seal 7 Blade 8 Groove 9 Protrusion

Claims (1)

[Scope of utility model registration request] 1. A closed type kneader having a gap (3) between an end surface (1a) of a land (1) and an inner wall surface (2a) of a kneading tank (2), wherein the end surface (1a) or the inner wall surface is The kneading material (4) that has entered the gap (3) in (2a)
A hermetically-sealed kneading machine, characterized in that a spiral groove (8) or a protrusion (9) for sending back to the outer peripheral side of the gap (3) with the rotation of the land (1) is provided.