JPH011510A - Multi-component synthetic resin mixing equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a multi-component synthetic resin mixing device for mixing chemically reactive resin components such as polyurethane resin and injecting the mixture into a mold.

(Prior Art) For example, in the molding process of polyurethane resin, a mixing device is used that injects a plurality of resin components that react with each other into a mixing chamber, mixes and stirs them, and discharges them into a predetermined mold. However, in recent years, in this type of mixing device, in order to enhance the mixing and agitating effect of the mixed components and to obtain a smooth flow of the discharged resin components, a constriction section, an i-shaped section, etc. are installed in the mixing chamber and the discharge passage of the components. is being established.

For example, a mixing head disclosed in Japanese Unexamined Patent Publication No. 58-167145 has a plurality of weir members arranged in a mixing chamber so as to be able to move in and out. In addition, Japanese Patent Publication No. 57-30062 discloses that an aperture slider having a hole forming a part of the mixing chamber is arranged in a reciprocating manner within the mixing chamber, and the flow is lowered in the mixing chamber depending on the position of the hole. Disclosed is a method in which the mixing efficiency is increased by changing the plane of the flow path of the resin component.

Among these prior art techniques, the former has an excellent so-called throttling effect that narrows the flow path of the resin component flowing down the mixing chamber, but has the problem that it is difficult to obtain a smooth flow of the resin component at the discharge section. There is. Furthermore, the latter method has the problem that changes in the flow of the resin component are greatly influenced by the dimensions of the mixing chamber, making it difficult to obtain sufficient effects.

In addition, few conventional devices have an effective structure for eliminating poor stirring caused by turbulence in the initial flow of each resin component at the start of mixing.

(Problems to be Solved by the Invention) This invention has been proposed in view of the above-mentioned problems, and the first is that the mixing and stirring effect of mixed components can be dramatically increased. Our goal is to provide mixed bags. This improvement in the mixing and stirring effect is particularly important due to the turbulence of the initial flow of each resin component at the beginning of mixing.
This also includes eliminating poor stirring.

At the same time, JI would like to provide a mixing device with a new structure that can obtain an excellent mixing and stirring effect as well as a smooth flow (static flow) of the resin components discharged from the mixing device into the mold. It is a target.

(Means for Solving the Problems) That is, the present invention is configured such that a cleaning member reciprocates within a mixing chamber that has a plurality of inlets for each resin component and an outlet for mixed components. In the mixing device, when reversing! , the IJ notch constitutes a part of the inner wall of the mixing chamber, and when moving forward, the resin component flowing into the mixing chamber is diverted in a substantially perpendicular direction by the upper surface of the IJ, and at the notch. A variable T& member that forms one or more throttle passages between the main body block and the sunken key member is provided so that it can move forward and backward, and when moving forward, the notch forms a part of the inner wall of the mixing chamber, and when moving backward, Relating to a multi-component synthetic resin mixing device, wherein a chamber block forming a current changing chamber communicating with the throttle channel is sunk in the f direction of the key member and the advanced current changing member so as to be movable forward and backward. .

(Example) The detailed description of the present invention is as follows with reference to the attached drawings.
FIG. 1 is an overall longitudinal section showing a multi-component synthetic resin mixing device according to an embodiment of the present invention]4. Figure 2 is an enlarged vertical cross-sectional view of the main parts showing the mixing state of the same mixing device with the cut points different by 90 degrees.
Figure 3 is a longitudinal cross-sectional view showing the same (non-mixing +h-shaped IE), Figure 4 is a cross-sectional view showing the current transformation member and the chamber block, and Figure 5 is the same equipment main body centered on the transformation member and chamber block. FIG. 6 is a cross-sectional view showing the combination fL of the current transformation member and chamber block, FIG. 7 is a plan view when the mixing is stopped, and FIG. 8 is a diagram showing the mixing state. FIG. 6 is a cross-sectional view taken along lines A-A, B-B, and C-C in FIG. 6;

Multi-component synthetic resin mixing device lO illustrated in the embodiment of FIG.
is a mixing device for polyurethane resin, which has an inlet 21, 22 for each resin component and an outlet 31 for the mixed component.
A cleaning rod 3 inside the mixing chamber 20 having
5 is provided so as to be able to freely reciprocate. In FIG. 1, reference numeral 11 is a main body block, 12 is a cylinder portion of a cleaning rod 35, 13 is a piston of the cleaning rod, and 14 and 15 are inlets and outlets for hydraulic oil. Further, in the figure, reference numeral 23 indicates a jet nozzle attached to the inlet 21, 22 for each resin component, 24 indicates a switching valve for the resin component, 25 indicates a component supply conduit from each resin component tank, and 26 indicates each component. A return conduit to the tank (not shown).

FIGS. 2 and 3 are longitudinal sectional views of the vicinity of the mixing chamber 20 in which the cutting positions are different from each other by 90 degrees in this device. As described above, a chamber block 61 forming a key member 40, a current changing member 50, and a current changing chamber 60 is disposed in the mixing chamber 20 between the inlet 21, 22 and the outlet 31. In addition, the inlet is 3
Or it may be 4.

That is, first, the key member 40 will be explained. This key member 40 is shown in FIGS. 2 and 5, and if necessary, in FIG.
As can be seen from FIG.
1 is integrally fixed.

As shown in FIG. 2, the current transformation member 50 is connected to a cylinder assembly 2155 and is configured to move forward and backward orthogonally to the mixing chamber 1<-20. .58 is an inlet and an inlet for the driving fluid of the cylinder device 55.

That is, when the current transformation member 50 is retracted, the notch 51 constitutes a part of the inner wall of the mixing chamber, as shown in FIG. This is stop mixing of resin components 12
It's time.

On the other hand, when the current transformation member 50 moves forward, the mixture 11+j
However, as shown in FIG. 2, the flow of all the resin components flowing into the mixing chamber 20 at the +NiNi inlet/inlet 21 and 22 is changed in a substantially perpendicular direction by the two-sided fi 53 across the inside of the mixing chamber 20.

The current changing member 50 completely blocks the flow of the resin component in the discharge direction n31. At the same time, the above-mentioned key member 40 sunk into the main body block is inserted into the notch 51 of fii.
A throttle passage C is formed between the two, and the resin component is introduced into the current changing chamber 60, which will be described below, through the throttle passage C.

Next, let's consider the current transformation chamber 60 as Ig+.

The chamber 60 is formed by retreating a chamber block 61 that moves forward and backward within the chamber 60. That is, as shown in FIG.
0 is connected to a piston rod 66 of a cylinder device 65 provided on the rear side, and is configured to be reciprocated by the drive of the cylinder device 65.
7 and 68 are inlet and outlet ports for the driving fluid of the cylinder device 7145.

When the chamber block 61 moves forward, which is when the mixing is stopped, the notch 63 constitutes a part of the inner wall of the mixing chamber, as shown in FIG.

On the other hand, when the chamber block 61 is retracted, this is during mixing, but as shown in FIG.
A current transformation chamber 60 that communicates with the throttle channel C is formed below the current transformation member 50 that has moved forward. In addition,
It goes without saying that the size (volume) of the current transformation chamber 60 can be arbitrarily determined by adjusting the retraction position t of the chamber block 61 using the stopper pin 69.

An effective structure for achieving a good cooperative relationship between the key member 40 and the channel block 61 forming the current changing member 50 and current changing chamber 60 is shown in the embodiment.

That is, as shown in FIGS. 4, 5, and 6, the chang/ku block 61 has a key groove 62 for the key member 40 at its upper part, and the 1ffiW is moved along this groove. . Furthermore, the chamber block 61
Sliding grooves for both side arm portions 52 and 52 of the current-changing member 50 are formed on both sides of the current-changing member 50, so that the current-changing member 50 and the chamber block 61 can be smoothly moved forward and backward.

(Operation) Next, the water device 10 will be explained in more detail along with its operation.

First, the mixing state will be explained with reference to FIGS. 1, 2, 5, and 8.

As shown in the figure, into the mixing chamber 20 where the cleaning member 35 has retreated, the holding valves 24 and 24 are turned on, and each mixed resin component is injected from 121 and 22.The resin components collide. It flows down the mixing chamber 20 while being stirred (reference numeral a in FIG. 5).

A mixing chamber 20 directly connected to the inlets 21 and 22
Inside, the mixing chamber 20 is blocked in the cross-sectional direction by the advancement of the current transformation member 50, and the resin component is blocked by the upper surface portion 53 of the current transformation member 5o and is transformed in a substantially perpendicular direction (FIG. 5). b).

The current-modified resin component is ejected into the lower current-changing chamber 60 through the throttle passage C formed between the notch 52 of the current-changing member 51 and the key member 4o.

At this time, the flow velocity of the resin component is increased through the constriction space C, and it is struck by a violent flow into the current transformation chamber 60, where secondary agitation is performed (symbol C in FIG. 5).If the constriction passage C is If there are two locations C1 and C2 on both sides, the resin components separated into two parts are again subjected to self-flow collision mixing within the chamber, which is even more effective.

The resin component that has been secondarily stirred in the current changing chamber 60 then flows out to the mixing chamber discharge port 31 through the open space below the current changing member 50 (reference numeral d in FIG. 5).
, this and 5. Since the mixing chamber discharge port 31 is an open space, the resin component quietly flows out to the outside.

In this way, each resin component at the time of mixing flows into the inflow 11
In addition to the primary stirring in the surrounding mixing chamber, secondary stirring is performed in the variable current chamber via the throttle passage C, so that the mixing efficiency is dramatically improved. In addition, to show the data in the example, the flow velocity of the resin component during the primary stirring at the inlet 21.22 is 100 m/sec, and the flow velocity of the resin component during the secondary stirring at the throttle passage C is 70m
/seC.

Next, according to FIG. 3 and FIG. 7, a description will be given of the time when mixing is stopped.

When mixing is stopped, the cut-off valve 24 shown in FIG. 1 is turned OFF, and the injection of each resin component into the mixing chamber is stopped. And, as illustrated in FIGS. 3 and 7,
The f-temperature member 50 retreats and draws into the inner wall of the mixing chamber 20, and the chamber block 61 moves forward to push out the resin component in the variable current chamber 60 into the mixing chamber 20.

At the same time, the cleaning member 35 cleans the inside of the mixing chamber 20.
passes through and discharges the residue of the resin component to the outside from the discharge port 31. In this way, the current changing chamber 40 and the mixing chamber 20 are cleaned, and preparations are made for the next mixing.

(Effects) According to the present invention as illustrated and explained, the resin components that flowed into the mixing chamber from the inlet are first stirred by countercurrent collision around the inlet, and then After flowing down the mixing chamber, the flow toward the discharge port 31 is completely blocked by the current changing member, and the current is changed in the right angle direction. The resin component whose current is changed in the right angle direction is ejected into the current changing chamber through the constriction space formed by the notch of the variable li, the member, and the key member, where it is subjected to secondary agitation. In the case where a plurality of throttle passages CI and C2 are provided as in the embodiment, mixing in the directions 11i and Wji is performed here, and further stirring is performed in the directions. After the second stirring is performed, the flow of the resin component is changed perpendicularly to pg, and the flow velocity of the resin component, which has been accelerated in the previous constriction passage, is decelerated. Then, it is discharged into the mold from the mixing chamber discharge port in a quiet flow (smooth flow).

In this way, according to the device of the present invention, current transformation - secondary stirring -
Since it undergoes a process called current transformation, it is possible to obtain both a high mixing and stirring effect of the resin component and a smooth flow of the discharged component. Of course, with this device, it is possible to eliminate the poor stirring caused by the turbulence of the initial flow of each resin component at the start of mixing.

Furthermore, according to this IJ1 device, the size of the throttle passage can be changed by the shape of the notch of the current transformation member and its forward position, and the chamber volume of the current transformation chamber can be adjusted by adjusting the retracted position of the chamber block. Since it can be easily changed depending on the mixing conditions, the best one can be selected depending on the mixing conditions, etc., and the actual effect is large and practical.

[Brief explanation of drawings]

FIG. 1 is an overall longitudinal cross-sectional view showing a multi-component synthetic resin mixing device according to an embodiment of the present invention, and FIG. 2 is an enlarged vertical cross-sectional view of the main parts showing the mixing state of the same mixing device with the cut points changed by 90 degrees. Fig. 3 is a vertical cross-sectional view showing the turning (mixing stop F state), Fig. 4 is a cross-sectional view showing the wave changing member and chamber block, and Fig. 5 is the same variable 1i, a device centered on the member and chamber block. The main part! /j A broken perspective view, FIG. 6 is a sectional view showing a combination fL of a current transformation member and a chamber block, and FIG.
The figure is also the top view when mixing is stopped F, and the 8th figure is also the mixed state y! : , A-A and B in Figure 6
-B and C-C lines are cross-sectional views. DESCRIPTION OF SYMBOLS 10...Multi-component synthetic resin mixing device, 20...Mixing chamber, 21.22...Resin component inlet, 31...
・Discharge port, 35...Cleaning rod, 40...
Key member, 50... Current transformation member, 51... Notch, 5
3... 4-plane part, 60... Current transformation chamber, 61...
...Chamber block, 63...Notch, C...
Aperture passage. Work 1 7 Figure 2 Figure 3 Figure 4) Figure 5

Claims (1)

[Claims] A mixing chamber (20) having a plurality of inlets (21, 22) for each resin component and an outlet (31) for mixed components.
), in which the cleaning member (35) is configured to reciprocate within the mixing chamber, the notch (51) forming part of the inner wall of the mixing chamber when retracting, and extending across the inside of the mixing chamber when moving forward. The upper surface portion (53) transforms the flow of the resin component flowing into the mixing chamber in a substantially perpendicular direction, and the notch portion (51) has one or more grooves between the key member (40) provided on the main body block. The current changing member (50) forming the throttle passage (C) is provided so as to be able to move forward and backward, and when moving forward, its notch (63) forms a part of the inner wall of the mixing chamber, and when moving backward, the key member (40) and the forward moving The throttle channel (
A multi-component synthetic resin mixing device characterized in that a chamber block (61) forming a variable current chamber (60) communicating with C) is provided so as to be movable forward and backward.