JPS62158008A - Mixing equipment for multi-component synthetic resin - Google Patents

Abstract

PURPOSE:To enhance the mixing and agitating efficiency and at the same time make it possible to pour mixed resin components in a mold in the form of static flow by a method wherein a mixing chamber, into which the respective resin components flow through the inflow ports for the respective resin components, which are opened at the retreat of a cleaning rod so as to be agitated by colliding with each other, is formed in said cleaning rod, and the mixed components which are agitated in the mixing chamber are discharged through a discharge chamber. CONSTITUTION:A long groove-shaped mixing chamber 22 is provided in the axial direction of a cleaning rod 20A so as to agitate both resin components by colliding with each other therein after the inflow ports 11 and 12 for the respective resin components are opened by the retreating movement of the cleaning rod. The agitated mixed components flow out through the small diameter tip part 29 of the cleaning rod 20A into a discharge chamber 13 and are then discharged outside through a discharge port 14. At his time, after being agitated by collision in the mixing chamber 22 in the cleaning rod 20A, the respective resin components are given throttling effect through the process ranging from the mixing chamber 22 to the discharge chamber 13 so as to be agitated more favorably and at the same time to damp the energy of collision in order to be discharged in the form of soft flow.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) 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.

(Prior art) For example, when molding polyurethane resin, predetermined amounts of each resin component, including an organic polyisocyanate component and an active hydrogen-containing organic compound component mixed with a reaction catalyst 1 blowing agent, foam control, etc., are placed in a mixing device. The resin is sent there, mixed and stirred, and then injected into a predetermined mold as a reactive mixed resin. Conventionally, as this type of mixing device, one in which resin components are injected into a mixing chamber at high pressure and collided with each other to cause slag mixing has been useful and widely used.

(Problems to be Solved by the Invention) As a dual type mixing device, the Japanese Patent Publication No. 55-2
No. 6968 is a typical example, but this type of high-pressure injection mixing device not only prevents poor stirring and imbalance in the initial stage of mixing, but also improves mixing and stirring efficiency. Especially when discharging mixed resin components, static fR, (smooth flow)
A major technical problem is that it can be injected into a mold.

This invention was proposed with the aim of solving the above problems.

(Means for Solving the Problems) The invention disclosed herein first provides a mixing device configured such that a cleaning rod reciprocates within a discharge chamber having an inlet for each resin component. A mixing chamber is formed in the cleaning rod in which an inlet for each of the resin components is opened when the rod is retracted, and each resin component flows in and is agitated by collision, and the mixed components stirred in the mixing chamber enter the discharge chamber. This invention relates to a multi-component synthetic resin mixing device characterized in that the multi-component synthetic resin is discharged through the multi-component synthetic resin mixing device.

Additionally, the second invention includes, in addition to the configuration of the first invention above,
The multi-component synthetic resin mixing device is characterized in that a scraper pin is attached to the mixing chamber so as to discharge the residue of the mixed components in the mixing chamber when the cleaning rod moves forward.

(Function) The present invention relates to a mixing device configured such that a cleaning rod reciprocates within a discharge chamber having an inlet for each resin component.

A mixing chamber is formed in the cleaning rod. This mixing chamber is such a mixing chamber that when the cleaning rod retreats (that is, during mixing), the inlet for each resin component in the discharge chamber is opened, and each resin component flows therein and is agitated by collision. It is.

The mixed components collided and stirred in this mixing chamber are then discharged through the discharge chamber.

That is, in the device of this invention, the resin components are first collided and mixed in the mixing chamber, and secondarily, a squeezing effect is imparted during the process from the mixing chamber to the discharge chamber, resulting in better agitation. At the same time, the collision energy is attenuated and ejected as quiet waves.

In addition, in the second invention in which a scraper pin is installed in the mixing chamber, when the cleaning rod moves forward (that is, when discharging the mixed components), the residue of the mixed components remaining in the mixing chamber is discharged by the pin. can do.

(Example) An example of the present invention will be described below with reference to the attached drawings, regarding a mixing device for two components of polyurethane resin.

Figure 1 shows a polyurethane resin mixing device showing a first embodiment of the present invention, Figure 1a is a vertical sectional view taken at the inlet of the discharge chamber, and Figure 1b is a vertical cross-sectional view of the inlet. Figure 1c is a longitudinal cross-sectional view of the same during mixing (injection), Figure 2 is a mixing device showing a second embodiment of the present invention, and Figure 2a is a discharge chamber. Fig. 2b is a vertical cross-sectional view taken at the position of the inlet, and Figure 2b is a vertical cross-sectional view taken at the time of discharge, taken at a right angle to the inlet.
FIG. 2C is a longitudinal cross-sectional view during mixing (injection), and FIG. 3 shows a third embodiment of the present invention.
Fig. 3a is a vertical cross-sectional view taken at the inlet of the discharge chamber, Fig. 3b is a longitudinal cross-sectional view taken at right angles to the inlet when discharging, and Fig. 3C is a longitudinal cross-sectional view taken at the time of mixing (injection). The vertical cross-sectional view and the fourth figure are of a mixing device showing a fourth embodiment of the present invention, and FIG. 4a is a vertical cross-sectional view taken at the inlet of the discharge chamber, and FIG. FIG. 4C is a longitudinal sectional view taken at a right angle when discharging, and FIG. 4C is a longitudinal sectional view taken at the time of mixing (injection).

[First Embodiment] First, the first embodiment shown in Fig. 1 will be explained.As understood from Fig. 0, the present invention apparatus includes a discharge chamber 13 having inlets 11 and 12 for each resin component. In Figure 0, which is configured such that the cleaning rod 20A reciprocates inside the main body block, 10 is a main body block;
Reference numeral 4 represents a discharge port, 15 represents a hydraulic cylinder device for driving a cleaning rod, 16 and 17 represent an outlet for the hydraulic oil, and 21 represents a piston.

In this device, as shown in FIG. 1b, a long groove-shaped mixing chamber 22 is provided in the axial direction of the cleaning rod 20A. This long groove-shaped mixing chamber 22 is configured so that when the cleaning rod retreats, that is, during mixing, the inlets 1 and 12 for the resin components are opened, and both resin components are collided and agitated therein. has been done.

With.

The mixed components stirred in the mixing chamber 22 are configured to flow into the discharge chamber 13 from the narrow end portion 29 of the cleaning rod 20A and be discharged from the discharge port 14 to the outside (molding mold, etc.). (See Figure 1C).

As mentioned before, in the device of this invention, each resin component is collided and agitated in the mixing chamber 22 in the cleaning rod 20A, and then transferred from the mixing chamber 22 to the discharge chamber 13.
In the process, a squeezing effect is applied to improve agitation, and at the same time, the collision energy is attenuated and the material is discharged as a quiet smear.

Figure 1 shows a scraper pin 30 in the mixing chamber 22.
is shown in which the cleaning rod 20 is reciprocated and the mixing chamber 22 is
It is extremely useful because it allows you to clean the inside of the machine.

That is, as understood from the figure, the scraper pin 3
0A is inserted from the main body block 10 across the long groove-shaped mixing chamber 22. Reference numeral 31 indicates a pin hole for a scraper pin formed in the main body block 10.

When the scraper pin 30A is mounted from the main body block 10 into the long groove-shaped mixing chamber 22, it is desirable for cleaning that the length of the long groove-shaped mixing chamber 22 is approximately the same as the stroke length of the cleaning rod 20A, FIG. 1b. As can be easily understood from FIG. 1C, the reciprocating movement of the cleaning rod 20A allows the scraper pin 30A to effectively discharge the residue of the mixing components remaining in the mixing chamber 22.

[Second Embodiment] In the second embodiment shown in the second figure, a circulation channel for each resin component is formed in the apparatus of the first embodiment described above when mixing is stopped. Such a method in which circulation channels are formed for each resin component when mixing is stopped is well known, for example, in Japanese Patent Publication No. 55-26968 and other known documents.

In FIG. 2, reference numerals 51 and 52 are outlet ports for returning each resin component to the component tank, and 53 and 54 are return grooves formed in the axial direction of the cleaning rod 20B. The return grooves 53,54 guide each resin component from the respective inlet 11,12 to the respective outlet 51,52 when mixing is stopped.

The same components as in the first embodiment are given the same reference numerals and will not be described.

[Third Embodiment] In the third embodiment shown in Figure 3, the mixing chamber 23 of the cleaning rod 20C is formed to have almost the same cross-sectional shape as the scraper via 30C, and when the cleaning rod moves forward, A scraper pin 3 is installed in the mixing chamber 23.
0C is inserted so that it can reciprocate.

In this embodiment, when the cleaning rod 20C is retracted, that is, during mixing, the mixing chamber 20C of the cleaning rod 20C is
3 opens the inlets 11 and 12 for each resin component, collides and stirs both resin components therein, and then discharges the mixed components from the narrow diameter portion 29 at the tip of the cleaning rod into the chamber 1.
3 is the same as the embodiment described above.

However, for Scraper Pier 30C, cleaning rod 2
It reciprocates with the movement of 0C.

In other words, this scraper pin 30C is configured to be able to move forward and backward into the discharge chamber 13 by a cylinder device 32 as shown in FIG. (when the mixing is stopped) into the mixing chamber 23. This situation is better understood from Figure 3a. In the same figure, reference numerals 33 and 34 are hydraulic pressure inlets and outlets, and 35 is an outlet for discharging the residue in the mixing chamber 23.

The scraper pin 30C of this embodiment is retracted and buried within the main body block 10 so as not to hinder the movement of the cleaning rod 20C except when cleaning the mixing chamber 23.
If necessary, it is also possible to move forward during mixing and protrude into the discharge chamber 13, as shown in FIG. 3C, so as to function as a puffer.

In this embodiment as well, the same components as in the first embodiment will be given the same reference numerals and will not be described further.

[Fourth Embodiment] Finally, the fourth embodiment shown in FIG. 4 will be described.

In this fourth embodiment, the cleaning rod 20D mixing chamber 2
The tip end side of the rod No. 4 is formed as an opening 25.

Here, the scraper pin 300 is inserted so as to be close to the mixing chamber opening 25 when the cleaning rod 20 is retreated.

In this fourth embodiment, when the cleaning rod 20D is retracted, that is, during the mixing shown in FIG.
At the same time, a mixing and stirring space S is formed by a scraper pin 30D provided close to the mixing chamber opening 25. The mixed components collided and stirred in the mixing and stirring space S are discharged from the discharge chamber 1 through the gap C between the opening 25 at the tip of the cleaning rod and the scraper pin 30D.
It will be leaked within 3 days.

In this case, it is extremely advantageous to adjust the proximity distance between the scraper pin 300 and the mixing chamber opening 25, that is, the gap C for the outflow of the mixed components, in terms of setting the mixing and stirring conditions. In this example, as shown in FIG. 4a, the scraper pin 30D is configured to be movable in the axial direction of the cleaning rod 20D by adjusting screws 36, 36. Reference numeral 37 is a pin holding portion of the main body block 10.

The situation in which the mixing chamber 24 is cleaned of debris is shown in FIG. 4b. As shown in the figure, it is preferable to configure the scraper pin 3QD to substantially abut the rear end of the mixing chamber 24 when the Kliniger rod 20D is in front 'a'.

In this fourth embodiment as well, the same components as those in the first embodiment are given the same reference numerals and their explanations will be omitted.

(Effects) As illustrated and explained for each of the embodiments above, in the mixing device of the present invention, the cleaning rod is configured to reciprocate within the discharge chamber having an inlet for each resin component. An inlet for each of the resin components is opened in the cleaning rod when the rod retreats, and a mixing chamber is formed in which each resin component flows into and is agitated by collision;
The mixed component stirred in the mixing chamber is configured to be discharged through the discharge chamber, so that the resin component is first collided and mixed in the mixing chamber, and secondly, the resin component is mixed by collision in the mixing chamber. Next, in the process from the mixing chamber to the discharge chamber, a throttling effect is applied to achieve better stirring. At the same time, since the collision energy of each resin component is attenuated in the process of passing from the mixing chamber to the discharge chamber, the resin is poured out as a quiet flow from the discharge port into a mold or the like.

In addition, in the case where a scraper bin is installed in the mixing chamber, the residue of the mixed components remaining in the mixing chamber is effectively discharged by the scraper bin when the cleaning rod moves forward (that is, when the mixed components are discharged). This gives great advantages to continuous production.

As described above, according to the present invention, it is possible to improve the mixing and agitation efficiency by eliminating the agitation failure and imbalance at the initial stage of mixing in this type of high-pressure injection type mixing device, and in particular, it is possible to improve the mixing and agitation efficiency by statically flowing the mixed resin components. We were able to provide a product that has the great advantage of being able to be injected into molds etc. as (smooth flow).

[Brief explanation of drawings]

Figure 1 shows a polyurethane resin mixing device showing a first embodiment of the present invention, Figure 1a is a vertical sectional view taken at the inlet of the discharge chamber, and Figure 1b is a vertical cross-sectional view of the inlet. Figure 1c is a longitudinal cross-sectional view of the same during mixing (injection), Figure 2 is a mixing device showing a second embodiment of the present invention, and Figure 2a is a discharge chamber. Figure 2b is a vertical cross-sectional view taken at the position of the inlet, and Figure 2b is a vertical cross-sectional view at the time of discharge taken at a right angle to the inlet.
FIG. 2C is a longitudinal cross-sectional view during mixing (injection), and FIG. 3 shows a third embodiment of the present invention.
Fig. 3a is a longitudinal cross-sectional view taken at the inlet of the discharge chamber, Fig. 3b is a longitudinal cross-sectional view taken at right angles to the inlet when discharging, and Fig. 3c is a longitudinal cross-sectional view taken at the time of mixing (injection). The vertical cross-sectional view and the fourth figure are of a mixing device showing a fourth embodiment of the present invention, and FIG. 4a is a vertical cross-sectional view taken at the inlet of the discharge chamber, and FIG. FIG. 4C is a vertical cross-sectional view taken at a right angle during discharge, and FIG. 4C is a vertical cross-sectional view taken at the time of mixing (injection). 11.12...Inflow port, 13...Discharge chamber,
15... Cylinder device, 20A, 20B, 20C. 20D...Cleaning rod, 22, 23.24.
...Mixing chamber, 30A, 30C, 30D-...Scraper bin. Figure 2a Figure S2b Figure 2c Figure 3b Country Figure 3c Figure 4a Figure 4b Figure 4C

Claims (1)

[Scope of Claims] 1. In a mixing device configured such that a cleaning rod reciprocates within a discharge chamber having an inlet for each resin component, the flow of each resin component is caused to flow into the cleaning rod when the rod retreats. A mixing chamber is formed in which an inlet is opened and each resin component flows in and collides with the mixture, and the mixed components stirred in the mixing chamber are discharged through the discharge chamber. Component synthetic resin mixing device. 2. In a mixing device configured such that a cleaning rod reciprocates within a discharge chamber having an inlet for each resin component, the inlet for each resin component is opened in the cleaning rod when the rod retreats, and the inlet for each resin component is A mixing chamber is formed in which the resin components flow and are agitated by collision, and the mixed components agitated in the mixing chamber are discharged through the discharge chamber, and the mixing and agitation occurs when the cleaning rod moves forward. A multi-component synthetic resin mixing device, characterized in that a scraper pin is attached to the chamber so as to discharge the residue of the mixed components in the mixing chamber. 3. The multicomponent synthetic resin mixing device according to claim 2, wherein the mixing chamber is formed in the shape of a long groove in the axial direction of the cleaning rod, and a scraper pin is inserted into the mixing chamber. 4. The mixing chamber is formed in a cross-sectional shape that is substantially the same as the cross-sectional shape of the scraper pin, and the scraper pin is inserted into the mixing chamber so as to be reciprocally movable when the cleaning rod moves forward. Multi-component synthetic resin mixing equipment. 5. The multi-component synthetic resin mixture according to claim 2, wherein the rod end side of the mixing chamber is formed as an opening, and the scraper pin is inserted so as to be close to the mixing chamber opening when the cleaning rod is retracted. Device. 6. The multi-component mixing synthetic resin device according to claim 2, which is constructed so that the approach distance between the scraper pin and the mixing chamber opening can be adjusted.