JPH0119326B2 - - Google Patents

Description

When the mixing control block 20 is retracted, the inlet 22 for each resin component in the first mixing chamber 21 is opened.
23 are opened at the same time, and the components mixed and stirred here are introduced into the discharge passage 11 from the opening 26a of the second mixing chamber 26. On the other hand, when the mixing control block 20 moves forward, the insert rod 3
The inflow ports 22, 23 and the outflow ports 24, 25 of each resin component are connected by the return channels 31, 32 of 0, and the cleaning rod 40 is
A multi-component synthetic resin mixing device characterized in that it is configured to pass through a mixing chamber 26 and move forward in a discharge flow path 11.

2. The multi-component synthetic resin mixing device according to claim 1, wherein the moving distance of the mixing control block 20 is greater than the distance of the cross-sectional space of the discharge flow path 11.

3. The opening area of the opening 26a of the second mixing chamber 26 and the return channels 31, 3 of the insert rod 30.
2. The multi-component synthetic resin mixing device according to claim 1, wherein the total cross-sectional area of 2 is made equal to the total cross-sectional area of 2.

[Detailed description of the invention]

The present invention relates to a multi-component synthetic resin mixing device for mixing chemically reactive resin components and injecting the mixture into a mold.

For example, when molding polyurethane resin, an organic polyisocyanate component, a reaction catalyst,
A predetermined amount of each resin component of the active hydrogen-containing organic compound component mixed with a blowing agent, bubble control, etc. is fed into a mixing device, where it is mixed and stirred and poured into a predetermined mold as a reactive mixed resin. Ru. As one of this type of mixing apparatus, a high-pressure injection type is used in which each resin component is injected into a mixing chamber at high pressure and collided with each other to cause countercurrent mixing.

However, the present invention aims to provide an extremely advantageous mixing device that has good mixing and agitation efficiency, and can also feed mixed resin components into a mold as a static flow (smooth flow) when discharging the mixed resin components. It is something.

In order to achieve the above object, the present invention includes a main body block having a discharge flow path for the mixed liquid, and a main body block that is fitted into the main body block so as to be able to reciprocate in a crosswise manner with respect to the discharge flow path. the main body; an insert rod fixed to the block and fitted into the first mixing chamber of the mixing control block, the insert rod having a return flow path capable of connecting an inlet and an outlet of each resin component of the mixing control block; , and a cleaning rod fitted so as to be reciprocally movable in the discharge flow path of the main body block, and when the mixing control block is retracted, the inlets for each resin component in the first mixing chamber are opened at the same time, and the mixing is performed here. The stirred components are introduced into the discharge channel through the second mixing chamber, while the inlet and outlet of each resin component are connected by the return channel of the insert rod when the mixing control block moves forward. Along with being
The cleaning rod may be configured to pass through the second mixing chamber and move forward within the discharge flow path.

The explanation will be given below according to the attached drawings. Fig. 1 is a central vertical sectional view of a polyurethane resin mixing device showing an embodiment of the present invention during mixing (discharge), and Fig. 2 is a cross-sectional view taken along line 2-2. The cross-sectional views, Figures 3 to 5, relate to when the mixing is stopped (circulation). Figure 3 is a central longitudinal cross-sectional view, Figure 4 is a cross-sectional view taken along line 4-4, and Figure 5 is a cross-sectional view taken along line 5-4. FIG. 6 is a sectional view of the main part along line 5, and FIG. 6 is a perspective view showing the lower slide guide block of the main body block.

As can be understood from the illustrated drawings, the apparatus of the present invention includes a main body block 10, a mixing control block 20 fitted into the main body block 10 so as to be reciprocally movable, and a mixing control block 20 fixed to the main body block 10 for controlling the mixing control block 10. It is comprised of an insert rod 30 fitted into the control block 20 and a cleaning rod 40 fitted so as to be able to reciprocate through the discharge flow path of the main body block.

As is clear from the figure, the device of this invention jets out each mixed resin component into the mixing chamber from opposing injection ports during mixing to cause countercurrent mixing, and when mixing is stopped, each resin component is sent through each return conduit to each other. This is a system in which the resin component is circulated and fed into the tank.

First, the main body block 10 has a discharge flow path 11 for the mixed liquid, and, as can be understood from the central vertical cross-sectional view of the entire body shown in the figure, a cylinder for sliding a mixing control block 20 and a cleaning rod 40, which will be described later. It is connected to devices 29 and 49.

In addition, there are also upper and lower slide guide blocks 1 for smooth sliding of the mixing control block 20.
It has 5,16.

As shown in the figure, the mixing control block 20 is controlled by the main body block 10 by a hydraulic cylinder device 29.
The block is configured to reciprocate in a crosswise manner with respect to the discharge passage 11 of the block, and the block includes a first mixing chamber 2.
A first and second mixing chamber 26 are provided.

The first mixing chamber 21 is a cylindrical chamber with an opening at one end into which an insert rod 30, which will be described later, is inserted, and the other side communicates with a second mixing chamber 26, which will be described below. The first mixing chamber 21 has inlets 22, 23 and an outlet 2 for each resin component.
4, 25, the inlets 22, 23 are connected to the outlets 24, 23 by respective feed conduits 27a, 28a.
25 by each return conduit 27b, 28b,
It communicates with each component tank 27, 28. Reference numerals 22a and 23a in the figure are orifices attached to the inflow ports 22 and 23.

The second mixing chamber 26 is a penetrating chamber that is provided in communication with the first mixing chamber 21 and is formed to overlap with the cross-sectional space of the discharge passage 11 of the main body block 10.

The insert rod 30 is fixed to the main body block 10 and inserted into the first mixing chamber 21 of the mixing control block 20. This insert rod 3
Return passages 31 and 32 are provided in the mixing control block 20 to connect the respective inlets and outlets (22 and 24, 23 and 25) of the resin components of the mixing control block 20, respectively. ing.

The cleaning rod 40 is fitted into the discharge passage 11 of the main body block by, for example, a hydraulic cylinder device 49 so as to be able to reciprocate.

In this invention, switching between starting and stopping mixing is controlled by the reciprocating movement of the mixing control block 20 between backward and forward movement. The first mixing chamber 21 and the second mixing chamber 26 in this mixing control block 20 are configured to have the following positional relationship with respect to the insert rod 30 or cleaning rod 40. .

That is, at the time of mixing (discharging) shown in FIGS. 1 and 2, the mixing control block 20 is moved back as shown in the figure, and the inlets 22 and 23 of each resin component in the first mixing chamber 21 are closed. are opened at the same time, and countercurrent mixing occurs here. The mixed components stirred in the first mixing chamber 21 enter the second mixing chamber 26, where they enter a turbulent state and are secondarily stirred, and then the second mixing chamber 26
6 is introduced into the discharge flow path 11 through the opening 26a.

In this way, the resin components that flowed in from the respective inlets 22 and 23 are countercurrently mixed in the first mixing chamber 21, and then led to the second mixing chamber 26, where they enter a turbulent flow state. , is introduced into the discharge flow path 11 again and discharged. That is, as is clear from the figure, the flow of the mixed components reaching the first mixing chamber, the second mixing chamber, and the discharge channel is changed in the opposite direction, that is, in the 180 degree direction, and during this time, extremely good mixing and agitation is achieved. It will be done.

On the other hand, when mixing is stopped, as shown in FIGS. 3 and 4, the mixing control block 20 moves forward to control the return passages 31 and 3 of the insert rod
2 connects the inlets 22, 23 and the outlets 24, 25 of each resin component, so that the inlets 22, 23
Each resin component flowing from the tank is circulated to the respective component tank. At this time, the second mixing chamber 26 of the mixing control block 20 moves to a position where it overlaps with the cross-sectional space of the discharge flow path 11 of the main body block 10, and the cleaning rod 40 inserted into the discharge flow path crosses the second mixing chamber 26. enable movement.

FIG. 5 is a sectional view taken along the line 5--5 in FIG. 4. In order to facilitate smooth reciprocation of the mixing control block 20, the main body block has an upper slide guide block 15 and a lower slide guide as shown in the figure. Block 16 is installed. FIG. 6 is a perspective view of the lower slide guide block 16, with reference numeral 1
Reference numeral 1a denotes a hole constituting a portion of the discharge flow path 11.

Note that it is preferable that the moving distance of the mixing control block 20 between backward and forward movement is larger than the distance of the cross-sectional space of the discharge flow path 11. However, with this configuration, the flow of the mixed resin component can be more reliably changed during mixing, and if necessary, it can be prevented from adhering to the lower end surface of the cleaning rod 40 when the mixing control block 20 is moved. This is because it becomes possible to scrape off the residue of a mixed liquid.

In addition, in order to maintain the balance of pressure loss in each resin component tank during mixing and circulation,
It is extremely advantageous in the design of this type of mixing device to match the opening area of the opening 26a of the second mixing chamber 26 with the total cross-sectional area of each return passage 31, 32 of the insert rod 30. be.

In the mixing apparatus of the present invention configured as described above, the first mixing chamber 21 has an inlet 22, 23 and an outlet 24, 25 for each resin component, and a second mixing chamber 21 communicates with the first mixing chamber. Since the mixing control block 20 equipped with the mixing chamber 26 is inserted so as to reciprocate in a crosswise manner with respect to the discharge flow path of the main body block 10, when mixing each resin component, the first The components mixed countercurrently in the mixing chamber are
The current is transformed into the mixing chamber 26, where it becomes turbulent,
After being secondarily stirred, the flow is changed in the opposite direction again and introduced into the discharge flow path 11. Therefore, the resin components to be mixed are sufficiently stirred and mixed while the current changes are repeated, and a mixed liquid in an extremely well stirred state can be obtained. In particular, immediately after the start of mixing, poor mixing often occurs due to variations in the flow rates of each component, but with this device of the invention, the components are agitated without problems during the process of changing the flow to the discharge flow path via the second mixing chamber. There is almost no effect on the product.

In addition, since the resin component jetted out from the inlet of the first mixing chamber is introduced into the discharge passage through the second mixing chamber, the flow velocity of the mixed liquid is attenuated and a quiet laminar flow is produced from the discharge passage 11. Discharged into the mold.

Of course, when mixing is stopped, each resin component flowing in from the inlets 22 and 23 of the first mixing chamber 21 is circulated and fed into each component tank by the return passages 31 and 32 of the insert rod 30, and A cleaning rod 40 passes through the second mixing chamber 27 and cleans the inside of the discharge flow path 11 in preparation for the next mixing of resin components.

As described above, the mixing device according to the present invention can combine the extremely great advantages of this type of device in that optimal mixing agitation and static flow of the mixed liquid can be obtained.

[Brief explanation of drawings]

FIG. 1 is a central longitudinal cross-sectional view of a polyurethane resin mixing device showing an embodiment of the present invention during mixing (discharge), FIG. 2 is a cross-sectional view taken along the line 2-2, and FIGS. The figures relate to when the mixing is stopped (circulation), Fig. 3 is a longitudinal cross-sectional view at the center thereof, Fig. 4 is a cross-sectional view taken along line 4-4, and Fig. 5 is a sectional view taken along line 4-4.
FIG. 6 is a sectional view of the main part taken along line -5, and FIG. 6 is a perspective view showing the lower slide guide block. 10...Main block, 11...Discharge channel, 2
0... Mixing control block, 21... First mixing chamber,
22, 23... Inlet, 24, 25... Outlet,
26... Second mixing chamber, 26a... Opening of the second mixing chamber, 30... Insert rod, 31, 32...
...Return channel, 40...Cleaning rod.

Claims (1)

[Scope of Claims] 1. A main body block 10 having a discharge flow path 11 for a mixed liquid, and an inlet 2 for each resin component that is fitted into the main body block so as to be reciprocatingly movable in a crosswise manner with respect to the discharge flow path.
2, 23 and outlet ports 24, 25, and a second mixing chamber 26 that communicates with the first mixing chamber and is provided to be superimposed with the cross-sectional space of the discharge flow path. a control block 20, and a return fixed to the main body block and fitted into the first mixing chamber 21 of the mixing control block to connect the inlet and outlet of each resin component of the mixing control block. An insert rod 30 having flow paths 31 and 32 is fitted into the discharge flow path of the main body block so as to be able to reciprocate.