JPS62117621A - Mixing and kneading method - Google Patents

Abstract

PURPOSE:To perform sufficient mixing and kneading without scattering a minor constituent and also to unnecessitate the cleaning or the like of equipment and to increase efficiency by enclosing a material such as medicine, ink and resin in a package, mixing and kneading it with a rocking type mixer. CONSTITUTION:A powdery material water, etc., of prescribed amounts are introduced in a package and mixing or kneading is performed with a mixer having such a type that the rotational motion of a motor is converted into the rocking motion of a mixing tank. Paper, cloth, rubber, vinyl chloride sheet or the like are used as a package material and the degree of elasticity and shape are not especially limited. Still further, since the volume of the kneaded material is reduced when the kneading proceeds, the removal of air is preferably performed in the process. By this method, the cleaning of equipment and the adjustment of a propeller are not necessitated at each time of use and this method is optimum for the mixing and kneading of a small amount of various kinds of materials.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for mixing pharmaceuticals, industrial chemicals, beads, pigments, etc., and kneading inks, resins, cementitious materials, etc.

[Conventional technology]

Traditionally, powder mixing has been carried out using gravity drop type mixers such as V-type grinders, pulverized mixers such as pole mills, and rotary shakers such as rocking mixers. A dynamic type and various types of equipment are used. Further, the stirrer used for mixing liquids is generally of a forced stirring type using a propeller or a screw. On the other hand, as for crosstalk, high torque forced stirring mixers are used for most things except for high viscosity substances such as rubber and differential sticks. These devices are highly efficient and suitable for mass mixing, cross-mixing, and single variety mixing and kneading.

However, in the case of small quantities, mixtures of many types, and cross-wires,
The drawback is that it takes time to clean the equipment and adjust the propeller, screw, etc. (hereinafter simply referred to as adjustment) after each use. Furthermore, when mixing pharmaceuticals, pigments, etc., subtle differences in the ingredients added can make a big difference in the effect, and there are also issues such as escaping of small amounts of ingredients and variations between lots, so it is important to consider the need for mixing equipment. Cleaning and adjustment required a lot of time.

On the other hand, the same thing can be said about the kneading method, especially for materials such as epoxy resins that harden quickly or cement-based materials, which are mixed in small quantities at the construction site. A great deal of effort was required to ensure that the mixer was clean, and to clean and adjust the kneading machine.

[Problem that the invention seeks to solve]

The present inventors have developed a mixing method or kneading method that is comparable in mixing and kneading properties to current mixing methods and kneading methods, does not require cleaning or adjusting equipment, and does not cause trace components to escape. As a result of various studies regarding the kneading method, it was discovered that a rocking mixer (also called a gravity mixer) and packaging could be used, leading to the completion of this discovery.

[Means to solve the problem]

That is, the present invention is a method of mixing and kneading using a mixer and packaging that converts the rotational motion of a motor into the oscillating motion of a mixing or kneading tank.

The present invention will be explained in detail below.

The mixer used in the present invention is a type of mixer (
For example, a Chiyoda Gap Pro Omni Mixer (manufactured by Chiyoda Giken Kogyo Co., Ltd.) with a vibration amplitude of 100 times or more per minute, preferably 200 times or more, and a large vibration amplitude. It is also better to have less uneven rocking motion. However, the larger the contact area of the oscillating surface with the packaging, the more oscillating motion is transmitted to the materials to be mixed or kneaded, υ, the better the mixing and kneading properties, and the more the oscillating surface moves perpendicular to the direction of the oscillating motion af. , t.

It will be even better if there is a circular motion in the rocking motion, for example. On the other hand, the material used for packaging (hereinafter referred to as packaging material) may be any paper, cloth, rubber, PVC sheet, polyethylene sheet, etc., but a transparent material is preferable since mixing and cross-wire conditions can be confirmed.

There are no particular limitations on the thickness, elastic modulus, or shape of the packaging material, but if it is extremely thin, it may be damaged during mixing and kneading. When rubber is used as a packaging material, a rubber having an elastic modulus in the range of 1 x 10' to 1 x 10' kp/α2 is particularly good.

There are no particular restrictions on the shape of the package, but even if the package is large enough to fit into the mixing and kneading tank, it is not preferable to use a package that is larger than the rocking surface because efficiency will drop. Particularly in the case of mixed wires, if the contact area with the swinging surface is small, sufficient kneading may not be achieved, so it is preferable to use a product with a wide surface area in the plane direction, such as Zabuton, and to accommodate the long dimension of the bottom. The height is preferably about 1/2 or less.

The kneading method may be any conventional method, but it is preferable to remove air at an intermediate point in the kneading process from the viewpoint of shortening the kneading time and reducing the amount of air involved.

That is, when a predetermined amount of powder and water are put into a package and kneading is started, the powder is granulated. As the mixing progresses, the size of the granulated material increases, and the volume ratio of the kneaded material in the packaging decreases. Then, the ratio of the height to the dimension of the surface that contacts the swinging surface of the mixer increases.

When air is vented in this manner, the surface area in the plane direction relative to the height becomes larger, so that more swinging power is transmitted and crosstalk is sufficiently performed.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to Examples.

Example 1 Four pieces of cement material in the proportions shown in Table 1 were placed in a polyethylene bag (content f#tsz) and shaken using a rocking cycle/I/1200.
The mixture was kneaded for 5 minutes at a rate of 5 times/min. After the kneading was completed, the table flow value was measured, and then the mixture was sieved using a 2.5 cod sieve and the amount of raw material was measured.

Also, some of the cement paste was 4x4x16cWt.
1. Perform TIS standard curing and use material regulation 28.
The compressive strength was confirmed. The results are shown in Table 2. Note that the cleaning time after kneading was 0 minutes.

Table 1 [Comparative Example] Using a forced agitation type upper ptal mixer, 5 kg of cement material 2 of the formulation shown in Example 1 was kneaded by the mixing method specified in JISR5201, and then mixed in the same manner as in Example. The test was conducted. The results are shown in Table 2.

Table 2 Materials used〉 Cement JD manufactured by Kei Kagaku Kogyo Co., Ltd., ordinary bottled cement super a 7 lyca dust (average particle size α1μ) during the production of ferrosilicon Water reducing agent Manufactured by Denki Kagaku Kogyo Co., Ltd., product name: FT-50
0” Main ingredient, Apki! Lenaphthalene p Salt of phonic acid conjugate μ dehyde condensate, water used in terms of solid content Tap water oscillating mixer... Chiyoda Garzoro Omniφ mixer manufactured by Chiyoda Giken Co., Ltd. Model: 0M-5 Forced stirring type upper μ Mixer: MIC-562-1 model manufactured by Marui Co., Ltd. Example 2 After drying natural sand from Sagami River to bone dry H, JI81102
In the method prescribed in 1o)c! ? Perform sieving,
The amount remaining on each size sieve was measured and shown in Table 5.

Thereafter, sand of each particle size was put into the polyethylene bag used in Example 1 according to the composition ratio so that the total weight was 5 Yu, and mixed for 7 minutes at an oscillation cycle of I%/1000 times/min.

After the mixing was completed, one ounce of sand was arbitrarily taken from the polyethylene bag and the sieved portion was tested again in the same manner as specified in <JIslloz. The results are shown in Table 4.

When a particle size distribution chart was prepared based on the results of Tables 5 and 4, it was found that both had substantially the same particle size distribution as shown in FIG.

Note that the cleaning time of the mixer is 0 minutes.

Materials used Natural sand from Sagami River (specific gravity 2.58)

[Brief explanation of drawings]

FIG. 1 shows the particle size distribution when natural sand is sieved, and the particle size distribution of sand when the sieved sand of each particle size is mixed according to the composition ratio according to the method of the present invention.

Claims (1)

[Claims] 1. A method in which the materials to be mixed are sealed in a package and mixed using a rocking mixer. 2. A method in which the material to be kneaded is sealed in a package and kneaded using a rocking mixer.