JPH05220735A - Cleaning method for kneading tank and cleaning material for said cleaning - Google Patents

Abstract

PURPOSE:To provide the cleaning method in which the inside of a kneading tank of a kneader of batch type closed structure which can be cleaned safely in a short time and no foreign matters reamin in the tank after cleaning. CONSTITUTION:A number of base cloths with their sides of diameter length not beyong 1.5 times of circumferential length of a kneading blade are impregnated with a cleaning agent filled in a kneading tank of a kneader of closed structure with kneading blade, and the kneading blade is rotated in said state to clean the kneading tank.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to rubber, plastic,
The present invention relates to a method for cleaning the inside of a kneading tank in a batch-type closed structure kneader for ceramics, and a cleaning material used for the cleaning.

[0002]

2. Description of the Related Art In a kneading machine having a batch type closed structure for rubber / plastic / ceramic, two kneading blades are axially attached to the kneading tank by penetrating both end walls of the kneading tank. The cleaning work is not easy because of the presence of the kneading blades. The cleaning is usually performed by stopping the rotation of the kneading blades and removing the residual material with a scraping rod. There is also a cleaning method in which an appropriate amount of a rubber-like kneaded material such as a rubber compound for cleaning or raw rubber is filled and kneaded. In this cleaning method by kneading, the residual material in the tank is absorbed and removed by the rubber for cleaning.

However, the cleaning for removing the residual material with the above-mentioned scraping bar is difficult and time-consuming, and moreover, it is almost impossible to completely clean it. Further, in the kneading and cleaning method using the rubber-like kneaded material for cleaning, the rubber-based kneaded material for cleaning may remain in the kneading tank even if the residual material is sufficiently absorbed. In particular, the part hidden by the kneading blade cannot be reached by the cleaning tool nor can it be visually inspected, so that the cleaning state and the remaining substance cannot be confirmed. Cleaning the kneading tank is a necessary condition that it can be done safely in a short time and that no foreign material remains in the tank, but the conventional methods described above all satisfy all of these requirements. Not something to do.

[0004]

SUMMARY OF THE INVENTION The technical problem of the present invention is that the kneading tank in a batch type closed structure kneader for rubber / plastic / ceramic can be safely and quickly cleaned in a short time. It is to provide a cleaning method for preventing foreign materials from remaining in the tank later and a cleaning material for the cleaning.

[0005]

A cleaning method according to the present invention for solving the above-mentioned problems is to clean a kneading tank of a rubber / plastic / ceramic kneading machine having a hermetically sealed structure having a rotationally driven kneading blade. , A large number of flexible base fabrics whose sides or diameters do not exceed 1.5 times the circumferential length of the kneading blades are impregnated or adhered with a cleaning agent and filled in a kneading tank, In this state, the kneading blade is rotated for cleaning.

In the above method, as the base fabric, a woven fabric or a non-woven fabric made of plant fibers, synthetic fibers or metal fibers,
Alternatively, a flexible rubber sheet may be used, and a base cloth mixture prepared by mixing any one kind or a plurality of kinds of those base cloths may be used as the cleaning material. Further, as the cleaning agent, any one of a liquid surface-active material having releasability, a liquid oil and fat, an organic solvent, a plasticizer, and water, or a mixture of two or more thereof can be used. As a cleaning agent,
It is desirable to use a material that does not interfere with the next kneading even if it remains attached and remains in the kneading tank after cleaning, but if necessary, put a base cloth containing no cleaning agent in the kneading tank. The remaining cleaning agent can be wiped off by filling and rotating the kneading blade.

Further, as described above, the cleaning material of the present invention used for cleaning the inside of the kneading tank basically has a side or a diameter of 1.5 times the circumferential length of the kneading blade. It is constructed by impregnating or depositing a cleaning agent onto a number of flexible base fabrics having a length that does not exceed. It is effective that the minimum dimension of the side or diameter of each base cloth is such that at least a part thereof has a length larger than the diameter of the kneading blade, and the weight thereof is 2 g or more. The cleaning material may be formed by forming wrinkles on all or part of a base fabric made of a woven fabric, a non-woven fabric or a flexible rubber sheet made of plant fibers, synthetic fibers or metal fibers.

More specifically, the cleaning material of the present invention will be described. As the material of the base cloth constituting the cleaning material,
A woven fabric (including a knitted fabric), a non-woven fabric, or a flexible rubber sheet made of one or more kinds of long fibers such as vegetable fibers, synthetic fibers or metal fibers is used, and the thickness of the base fabric thereof is used. Should be equal to or smaller than the gap size between the wall of the kneading tank and the kneading blade. The shape of the base cloth may be any of a circle, a quadrangle, an elongated rectangle, a triangle, etc. In any case, it is necessary to have a dimension that does not wind around the kneading blade. Generally, any side or diameter is kneaded. The blade is formed to have a length that does not exceed 1.5 times the average circumferential length of the blade, but it is more preferable that the length is equal to or less than the circumferential length of the kneading blade.

The rubber-like sheet used in place of the woven cloth is cut into the above-mentioned shape and size, and this sheet is kneaded at a thickness not exceeding the gap between the kneading blade and the inner surface of the kneading tank. It is necessary to use a material having a reinforcing property that is not broken by the rotation of the blade. Further, as the cleaning agent to be impregnated or adhered to the base cloth, generally, a solvent such as kerosene, a liquid paraffinic oil and fat, etc. are used, and when these organic solvents are used, water is added as necessary. The base cloth impregnated or adhered with is mixed.

[0010]

When the cleaning material is filled in the kneading tank and the kneading blades are rotated, the cleaning material in the tank behaves in the same manner as when kneading rubber or the like. At that time, due to the friction of the base cloth and the action of the cleaning agent, the effect of separating the residual material from the wall of the kneading tank is sufficiently exerted, and the cleaning is completed by rotating the kneading blades for a short time. When wrinkles are formed on a base cloth made of a woven cloth, a non-woven cloth, or a flexible rubber sheet, there is an increasing effect and a cleaning effect by friction can be improved. When an organic solvent is used as the cleaning agent, the base cloth impregnated with water can be mixed at 5% or more of the filling amount to prevent electrostatic charge and ensure safety.

Moreover, since one piece of the base cloth is cut into a size that does not wrap around the kneading blades and used, tearing or tearing due to the wrapping does not easily occur, and any one side or By making the diameter dimension such that at least a part of it has a length larger than the diameter of the kneading blade, it becomes easy to find it after cleaning and it does not remain in the kneading tank and is peeled off. It is reliably discharged together with the residue.

In the case of a kneading machine in which it is difficult to visually check the inside of the kneading tank, the presence of the cleaning material remaining in the kneading tank is measured by measuring the weight of the discharged cleaning material after cleaning and before filling the kneading tank. It can be confirmed by comparing with the measured value of. A base fabric having a weight of 2 g or more per sheet together with the impregnated cleaning agent, and more preferably a weight of more than 50 g per sheet,
This is to make it easy to detect the shortage of one base cloth with a weighing device which is usually on the market.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a schematic structure of a kneading machine for rubber / plastic / ceramic having a batch type closed structure in which the kneading tank is cleaned by the method of the present invention. This kneading machine is provided with a kneading tank 2 which is supported on a machine frame 1 so as to be capable of tipping down and to which a pressure lid 3 is attached by a pressure cylinder 4. Two kneading blades 5 rotatably driven by a motor are axially mounted inside the kneading tank 2 so as to penetrate through both end walls of the kneading tank 2. For kneading, the kneading material is put into the kneading tank 2. Then, the kneading blade 5 is rotated.

When cleaning the kneading tank 2, a base cloth as shown in FIGS. 2A to 2C is used. Base fabric 1 of FIG.
0a is the base cloth 10 of FIG.
b is the base cloth 10 of FIG.
c shows the case where the shape is triangular, respectively. Further, FIG. 3 shows the base cloth 11 in which wrinkles are formed. The shape of the base cloth is not limited to the shape shown in FIG. 2, and the length of any side or diameter does not exceed 1.5 times the average circumferential length of the kneading blades, or at least those. A part of the side or the diameter may be larger than the diameter of the kneading blade, and the weight may be at least 2 g or more.

These base fabrics are formed of a woven fabric, a non-woven fabric or a flexible rubber sheet made of plant fibers, synthetic fibers or metal fibers, and when cleaning the kneading tank, the base fabrics A large number of base cloth mixtures are impregnated or adhered with a cleaning agent such as kerosene and filled in the kneading tank 2, and the kneading blades 5 are rotated in this state. This cleaning material is used by filling it in an amount that occupies an optimum kneading volume of about 70% of the kneading tank 2 in a natural state without being consolidated, and by rotating the kneading blades in a state similar to the kneading operation, The inside of the kneading tank can be cleaned in a short time. After cleaning the inside of the kneading tank by rotating the kneading blade, the cleaning material is discharged from the inside of the tank by the discharging operation.

In the experimental cleaning of the kneading tank using the above cleaning material, the base cloth does not wind around the kneading blades and is not torn or torn, and good cleaning can be performed. Cleaning of the kneading tank, which required 15 to 20 minutes for the work, could be shortened to about 5 minutes.
Further, in the conventional cleaning method in which the kneading tank is filled with the rubber-like kneaded material and kneaded and cleaned, there was a concern that the rubber-like kneaded material remains, but in the method of the present invention, it is easy to measure the used base cloth. It was possible to find the residual base cloth, and it was possible to eliminate the cleaning completeness and the anxiety of the residual material.

[0017]

EFFECTS OF THE INVENTION According to the method and cleaning material of the present invention described in detail above, it is possible to safely and safely clean the inside of the kneading tank of the kneading machine of the batch type closed structure for rubber, plastic and ceramics. Moreover, the foreign material does not remain in the tank after cleaning, and the anxiety of the residue can be eliminated.

In particular, since the cleaning material used in the present invention is formed of a woven fabric or a rubber-like sheet of a certain size, it does not break or tear due to winding around the kneading blade, At the same time as entering into the gap with the wall of the kneading tank to perform effective frictional cleaning, at the same time adding the action of the cleaning agent impregnated or adhering to it, peeling and cleaning of the residual material from the wall of the kneading tank Effectively
Cleaning can be completed by rotating the kneading blades for a short time. In addition, the presence or absence of the cleaning material remaining in the kneading tank can be easily visually confirmed because the side or diameter of each base fabric is larger than the diameter of the kneading blade, and the discharge cleaning material is also present. It can be easily confirmed by measuring the weight of the item with a commercially available measuring instrument.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a kneading machine to be cleaned according to the present invention in a state of seeing through a kneading tank.

2A to 2C are plan views showing examples of different shapes of the base cloth.

FIG. 3 is a cross-sectional view of a base cloth having wrinkles.

[Explanation of symbols]

2 kneading tanks, 5 kneading blades,
10a to 10c, 11 base cloth.

Claims (8)

[Claims] 1. When cleaning the inside of a kneading tank of a rubber / plastic / ceramic kneading machine having a closed structure having a kneading blade driven to rotate, a side or a diameter exceeds 1.5 times the circumferential length of the kneading blade. Kneading, characterized in that a large number of flexible base fabrics having no length are impregnated with or attached to a cleaning agent and filled in a kneading tank, and in this state, the kneading blades are rotated and cleaned. How to clean the tank. 2. The method according to claim 1, wherein a large number of base fabrics made of any one of woven fabrics, non-woven fabrics, and flexible rubber sheets made of plant fibers, synthetic fibers or metal fibers, or those A method for cleaning a kneading tank, characterized in that a base cloth mixture prepared by mixing a plurality of kinds of base cloth is used. 3. The method according to claim 1 or 2, wherein the cleaning agent is any one of a liquid releasable surfactant, a liquid oil and fat, an organic solvent, a plasticizer, and water. Alternatively, a method for cleaning a kneading tank, characterized in that a plurality of types thereof are mixed and used. 4. A cleaning material for filling the inside of a kneading tank of a rubber / plastic / ceramic kneading machine having a closed structure with kneading blades and cleaning the inside of the kneading tank by rotating the kneading blades. Or a kneading blade characterized in that it is constituted by impregnating or adhering a cleaning agent to a large number of flexible base cloths having a diameter not exceeding 1.5 times the circumferential length of the kneading blade. Cleaning material for cleaning the tank. 5. The woven fabric, non-woven fabric, or flexible rubber sheet made of plant fibers, synthetic fibers, or metal fibers as the base fabric according to claim 4, and any one of these base fabrics is used. A cleaning material for cleaning a kneading tank, characterized in that it is constituted by mixing one kind or a plurality of kinds. 6. The cleaning material for cleaning a kneading tank according to claim 4 or 5, wherein wrinkles are formed on all or part of the base cloth. 7. The cleaning agent according to claim 4 or 5, wherein the cleaning agent is any one of a liquid surface-releasing surfactant, a liquid oil and fat, an organic solvent, a plasticizer, and water. Alternatively, a cleaning material for cleaning a rubber kneading tank, characterized in that a plurality of kinds thereof are mixed and used. 8. The article according to claim 4 or 5, wherein the side or diameter of each base cloth has a length at least a part of which is larger than the diameter of the kneading blade, and A cleaning material for cleaning a rubber kneading tank, which has a weight of 2 g or more.