JPS6221511A - Mixing method for reactive raw material and its device - Google Patents

Abstract

PURPOSE:To mix up high-viscosity reactive raw materials containing a filling agent precisely with each other, by a method wherein the reactive raw materials are raked in grooves alternately through discharge ports and mixed up with each other by making a rotary shaft having a plurality of grooves and a plurality of raw material discharge ports formed on the circumference of the rotary shaft turn relatively. CONSTITUTION:A mixing nozzle part is composed of a rotary shaft 1 having a groove 7, a nozzle body 2 with which the rotary shaft 1 is contact by penetrating through longitudinally, supply routes 3, 5 supplying reactive raw materials A, B to the external circumference of the rotary shaft 1 inside the nozzle body 2 and discharge ports 4, 6 which are in contact with a part of the external circumferential surface of the rotary shaft 1. As the raw materials A, B transmitted with pressure are no standby at the raw material discharge ports 4, 6 and the rotary shaft is turned, a raked-in amount 10 of the raw materials A and a raked-in amount 11 of the raw materials B are raked in and filled up the groove in a plaquelike and stratified states in a manner wherein the raw materials A are supplied to the groove only while the groove 7 and discharge port 4 are coincident with each other, and as for the next discharge port 5, the raw materials B are supplied to the groove similarly and the raw materials are mixed up precisely with each other by a method wherein they are reached up to the tip part of the rotary shaft 1, released into a mixing space 9 and further agitated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method for mixing reaction raw materials and a mixing device using the same. used.

BACKGROUND OF THE INVENTION Conventional two-component adhesives such as epoxy are used in a two-component heating method, typified by static divisional mixing using a static mixer, or as disclosed in Utility Model Publication No. 60-113,
60-114, as seen in JP-A-51-97672, etc.
It is used for mixing using impingement mixing nozzles.

Problems to be Solved by the Invention However, conventional static mixers require a certain amount of liquid to mix, making them unsuitable for precise mixing and dispensing in controlled quantities, and impingement mixing nozzles are not suitable for mixing large amounts of liquid. It is only suitable for ejection.

Therefore, neither method is satisfactory for sufficiently mixing a relatively small amount of reaction materials.

The present invention is an attempt to solve such problems, and is an attempt to sufficiently mix highly viscous reaction raw materials containing fillers and the like.

Means for Solving the Problems In order to solve the following two problems, the present invention provides a method for mixing multiple liquid reaction raw materials, in which a rotating shaft having one or more grooves is formed around the rotating shaft. The main feature is a method of mixing reaction raw materials in which multiple liquids of reaction raw materials are mixed by alternately scraping the raw materials from the discharge ports into the grooves by rotating the plurality of raw material discharge ports relative to each other. In order to ensure mixing, the reaction raw materials of multiple liquids are mixed by releasing the raw materials of multiple liquids scraped into the groove into the same part and stirring them.

This mixing method and the device that embodies it include a mixing nozzle in which a rotating shaft with one or more grooves runs vertically through it, and a pressure feeding system that pumps the reaction raw materials from multiple raw material tanks to a localized area on the outer circumferential surface of the rotating shaft in the mixing nozzle. A drive means for rotating a rotating shaft, and a temperature control means for controlling the temperature of a required part of a path for pumping and mixing reaction raw materials.

Effect By using the above-mentioned means, as the rotating shaft rotates, the raw material is discharged into the groove while the raw material discharge port and the groove are aligned, and the next raw material is sequentially discharged at the next discharge port. When the shaft is rotated at a high speed of about 500 to 66-3200 rpm, it is filled into the grooves in a fine layer and mixed. This allows precise mixing. Furthermore, by releasing the plural liquid raw materials in the groove into the same part and stirring them, they can be mixed even more thoroughly.

Note that when the rotational speed is high and the liquid volume is two degrees, the raw materials are sufficiently mixed and the reaction proceeds even without stirring in a released state.

Moreover, when continuously discharging, the mixed liquid can be stably supplied without containing bubbles.

In particular, in the case of equipment, by timely pressure-feeding of multiple liquid raw materials, the mixing operation can proceed according to whether the mixture is used or not, and the temperature of the raw materials to be supplied and mixed can be controlled. As a result, the required degree of reaction can be obtained at the required rate.

Embodiment FIG. 1 is a sectional view of a mixing nozzle section embodying a mixing method, showing one embodiment of the present invention. Specifically, a rotary shaft 1 having a groove 7 (actually, a processing drill is used) and a nozzle body 2 where it runs vertically and contacts the reaction raw materials A and B are supplied to the outer periphery of the rotary shaft 1 inside the nozzle body 2. The supply path 3.6 includes a supply path 3.6, and discharge ports 4, 6 that are in contact with a local part of the outer peripheral surface of the rotating shaft 1. As a more preferable form, the tip of the rotating shaft is made thinner than the shaft to have a small-diameter tip 8 for complete mixing and a mixing space 9 created thereby. If necessary, a stirring blade 8a is provided around the small-diameter tip portion 8 as shown in an imaginary line.

A specific method of mixing the reaction raw materials is as shown in FIG. 2, where the raw material A is pumped into the raw material discharge port 4.6.

B is on standby, and by rotating the rotating shaft, raw material A is supplied to the groove for the time period when groove 7 and discharge port 4 coincide, and raw material B is similarly supplied to the groove at the next discharge port 6. In this way, 10 pieces of raw material A are scraped off in one Bragg-like layer.
．． A scraped portion 11 of raw material B is scraped and filled.

As this process is repeated, the raw materials reach the tip of the rotating shaft 1, are released into the mixing space 9, and are further stirred and mixed precisely. Depending on the thickness of the rotating shaft, the number of rotations per unit time, the depth of the groove, the viscosity of the raw material, the pressure applied to the raw material, etc., the scraped amount can be made into an extremely small amount (unit 7%) of 10 or 11, allowing for more precise mixing. As a result, sufficient mixing can be achieved even without continuous stirring.

Furthermore, the total amount of mixture discharged from the nozzle body 2 can be controlled by adjusting the timing of pressure feeding.

FIG. 3 shows an embodiment in which the present invention is applied to a two-component epoxy adhesive, and shows a two-component thermal disbenzer of the Indian type. A nozzle body 2 through which a rotating shaft 1 passes vertically is connected to a medical plastic syringe cylinder 12, 12' filled with raw materials A and B to the rear upper part of the nozzle body 2, and a spring for pushing the pistons 13, 13'. A type pressure jig 14 is interposed between the cylinders 13 and 13', and the reaction liquid is supplied from each cylinder 12, 12' to the nozzle body 2 through the reaction liquid supply path 15, 15' during nozzle cleaning. A valve 16 is provided to stop the. 17 and 17' are each supply route 15 and 15'
This is a reaction raw material discharge port that is in contact with a local part of the outer circumferential surface of the rotating shaft 1. The rotating shaft 1 is connected by a valve to a DC motor 18 installed at the rear thereof and a connecting part 19, and a switch 21 for starting and stopping the rotation of the motor is operated by hand together with a trigger 20 operated by a finger like a pistol. It is provided in the 22 part of the dispenser main body. Furthermore, in the second part of the nozzle body,
A semiconductor cooling unit 23 is provided as an example for realizing a method of mixing two-liquid reaction materials that utilizes cooling to delay the reaction.

With this structure, it is possible to use a two-component type epoxy adhesive that cures at room temperature, which was previously difficult to use, while following the characteristics of mixing multiple components as in the above embodiment.
It has become possible to use it continuously for more than 8 hours with intermittent work.

FIG. 4 shows an example of applying the mixing method of the present invention to reactive injection molding, in which reaction raw material A is used.

At 24 and 25 minutes after melting and preserving B, each raw material A was added.

Pipes 28, 30.32 and 29.31 that circulate B.

33 are connected to each other. Each pipe is
Pressure pump 26, 27 and 3-way valve 3 that controls circulation and discharge
4 and 35 in the middle, and a supply path 39.4 is connected to a mixing nozzle 36 similar to that in each of the above embodiments at a valve 34.35.
0 and a motor/cylinder valve 37 that rotates or moves the 9 pirn rotating shaft (not shown) back and forth; is an oil bath whose temperature is adjusted to a temperature of 120″C to 150°C,
A hot air tank, double piping, and 38 are provided.

Thereby, the mixing of multiple liquids as in the above embodiment is performed in the reactive injection molding process.

Effects of the Invention The present invention achieves the effect of precisely mixing even minute amounts by mixing relatively small amounts of multiple liquid reaction materials by alternately scraping them through the grooves of the rotating shaft, and also improves the depth of the grooves and the diameter of the rotating shaft. By doing so, it is possible to control from a minute amount to a certain amount by changing the rotation speed and pumping force, and it is applicable to everything from adhesive dispensers to reactive injection molding machines, and has great industrial value. Further, the mixing can be further promoted by discharging multiple liquids alternately scraped by the grooves and stirring them in the same part, or by using a device equipped with a temperature control means in a predetermined route for pressure feeding or mixing the raw materials. ' This method is very convenient in practice, as it allows mixing operations, reactivity, and reaction rates to be adjusted according to various situations of use or non-use of the mixture.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a mixing nozzle that embodies the mixing method of the present invention, Fig. 2 is a partial view of the rotating shaft showing the mixing method of the present invention, and Fig. 3 is a cross-sectional view of the mixing nozzle section embodying the mixing method of the present invention. Figure 4 is a partial cross-sectional view of the dispenser when it is put into practical use as a two-component adhesive dispenser.
FIG. 2 is a configuration diagram when applied to a reactive injection molding machine for polyesteramide, etc. 1... Rotating shaft, 2... Nozzle body, 3
, 5, 15゜16', 39.40...Reaction raw material supply route, 4,6゜17, 17'...Reaction raw material discharge port, 7...Groove, 12゜12′・・・・・・
Cylinder, 14...Spring pressure jig, 23...
...Cooling unit, 26.27...Pressure pump, A...Reaction raw material, B...Reaction raw material. Name of agent: Patent attorney Toshio Nakao and 1 other person1-
11th axis 2 --- Nozzle 蓓) Door Clearance ---) Lament ζN'Ishi S Figure 2

Claims (6)

[Claims] (1) In a method of mixing multiple liquid reaction materials, by relatively rotating a rotating shaft having one or more grooves and a plurality of raw material discharge ports formed around the rotating shaft, the reaction materials are alternately distributed from the discharge ports. A method for mixing reaction raw materials, characterized in that a plurality of liquid reaction raw materials are mixed by scraping the liquid into a groove. (2) In a method of mixing multiple liquid reaction materials, by relatively rotating a rotating shaft having one or more grooves and a plurality of raw material discharge ports formed around the rotating shaft, the reaction materials are alternately distributed from the discharge ports. A method for mixing reaction raw materials, characterized in that multiple liquid reaction raw materials are mixed by scraping the liquid into a groove, releasing it into the same part, and stirring. (3) A mixing nozzle in which a rotating shaft having one or more grooves runs vertically through the mixing nozzle, a pressure feeding means for pumping reaction raw materials from a plurality of raw material tanks to a local part of the outer peripheral surface of the rotating shaft in the mixing nozzle, and rotating the rotating shaft. A mixing device for reaction raw materials, which has a driving means and a temperature control means for controlling the temperature of a required part of a route for pressure feeding and mixing of reaction raw materials. (4) The reaction raw material mixing device according to claim 3, wherein the rotating shaft driving means is capable of controlling the number of revolutions of the rotating shaft per unit time. (5) The reaction raw material mixing apparatus according to claim 3 or 4, wherein the pressure feeding means has a timer function for adjusting the timing of pressure feeding of the raw materials. (6) The reaction raw material mixing apparatus according to claim 3, 4, or 5, wherein the temperature control means is configured to control the temperature of a mixing nozzle portion through which the rotating shaft runs vertically.