JPS6397218A - Mixer for multicomponent synthetic resin - Google Patents

Abstract

PURPOSE:To smoothly discharge mixed resin by freely reciprocatively providing a specified changeover rod rectangular to a discharge chamber so as to touch the aperture part of a mixing chamber to a main body block equipped with the mixing chamber and the discharge chamber. CONSTITUTION:Respective resin components introduced into a mixing chamber 20 with the backward movement of a cylinder piston 24 are allowed to collide with each other and stirred. Then these are introduced into a discharge chamber 40 via a notch part 51 from a throttling aperture part 29. In this case, a resin part M1 passed on the wall side of the notch part 51 is reduced in velocity by friction between the resin part and a wall surface 51A in comparison with a resin part M2 passed through the inside and thereby shearing action is caused. Besides centrifugal force accompanying the directional change of flow velocity by the notch part 51 is added and high stirring effect is obtained. The mixed resin components M stirred and mixed thereby are rectangularly introduced into the discharge chamber 40 through an outflow aperture part 49 and allowed to fall while being spirally rotated on the inner wall 40A and discharged as a smooth flow.

Description

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

(Prior Art) As a conventional device of this kind, for example, a multi-component synthetic resin mixing device 8o shown in FIG.
A mixing chamber 85 (95) and a discharge chamber 88 are provided orthogonally to each other, and the mixing chamber 85 (95) is provided with a cylinder piston 82 that can freely reciprocate and open and close inlets 83 and 84 for each resin component, and the other discharge chamber 8
8 is known in which a cleaning rod 87 is reciprocatably provided in contact with the opening 86 of the mixing chamber 85 (95) to open and close it.

To explain this conventional apparatus, first, each resin component is injected into the mixing chamber 85 from its inlet ports 83 and 84 and agitated by collision. This mixed resin component is
Next, the liquid is ejected into the discharge chamber 88 through the aperture opening 89 formed by the mixing chamber opening 86 and the cleaning rod 87, and is injected into a predetermined mold from the discharge port. The reference numeral 90 in the figure is the cleaning rod 87.
This stopper controls the retracted position of the stopper, and the degree of opening of the diaphragm opening 89 is adjusted by this stopper.

(Problems to be Solved by the Invention) However, in the above device, the aperture opening 89 is provided in order to obtain a smooth flow of the resin component to be discharged.
As shown in Fig. 8, the resin component ejected through this process is biased toward one wall of the discharge chamber 88, and as a result, a normal flow of the resin component cannot be obtained, which often causes problems in subsequent molding operations. There was a problem. Furthermore, since the jet of resin component from the mixing chamber 85 directly collides with the wall surface of the opposing discharge chamber 88, the resin component tends to entrain a large amount of air.

Furthermore, although this conventional device can be provided with two mixing chambers 85.95 as shown in the figure, the opening degree of the throttle opening 89 of the cleaning piston 87 is selected for each mixing chamber 85.95. It is extremely complicated to set the target.

This invention was proposed in view of the above-mentioned problems, and in particular, in a mixing device provided with a diaphragm opening, the opening degree of the diaphragm opening can be adjusted to be exquisite in relation to the outflow into the discharge chamber. The object of the present invention is to provide a mixing device with a novel structure that can be adjusted to the desired temperature.

Another object of the present invention is to provide a multi-component synthetic resin mixing device that ensures smooth flow of mixed resin components, avoids entrainment of air, and significantly improves its mixing ability. It is.

A further object of the present invention is to provide a multicomponent synthetic resin mixing device that can independently control the aperture opening of each chamber even when two mixing chambers are provided.

(Means for Solving the Problems) That is, the present invention provides a main body block having a mixing chamber having an inlet for each resin component and a discharge chamber in which a cleaning rod reciprocates, and which is in contact with the opening of the mixing chamber. A switching rod that is perpendicular to the discharge chamber is provided so as to be able to reciprocate, and the switching rod has a position where the cleaning rod can pass in a position where the mixing chamber is closed, and a position where the mixing chamber is opened. The present invention relates to a multi-component synthetic resin mixing device characterized in that a notch is formed to connect the mixing chamber and the discharge chamber.

(Example) The present invention will be described in detail below with reference to the accompanying drawings.
Fig. 1 is a cross-sectional view showing the mixing state of a multi-component synthetic resin mixing device according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main parts showing its operating state, and Fig. 3 is a mixing FIG. 4 is a cross-sectional view showing the mixing chamber in the stopped state, FIG. 5 is a longitudinal sectional view showing the mixing state of this device, and FIG. 6 is the mixing stopped state. FIG. 7 is a longitudinal sectional view showing the structure of a conventionally known multi-component synthetic resin mixing device, and FIG. 8 is an enlarged sectional view of essential parts showing its operating state.

The multi-component synthetic resin mixing device IO illustrated in the example is a mixing device for polyurethane resins, comprising a mixing chamber 20 (30) with inlets 21, 22 (31, 32) for each resin component and a cleaning chamber 20 (30). A switching rod 50 that is in contact with the mixing chamber opening 25 (35) and perpendicular to the discharge chamber 40 is provided on the main body block 11 having a discharge chamber 40 in which a rod 41 moves reciprocally. be.

The mixing chamber 20 (30) has an inlet 2 for each resin component.
1. Cylinder piston 2 that opens and closes 22 (31, 32)
4 (34). In the figure, 23 (33) is the hydraulic cylinder, 26.27 (36, 37) is the hydraulic cylinder 2
3 (33) is the outflow inlet for hydraulic oil.

A cleaning rod 41 is provided in the discharge chamber 40 so as to be able to reciprocate as shown in the vertical cross-sectional views of FIGS. 5 and 6. Reference numeral 42 in the figure is a hydraulic cylinder that reciprocates the cleaning rod 41, and 43 and 44 are inlet and outlet ports for the hydraulic oil that operates the hydraulic cylinder 41.

As can be understood from the cross-sectional view in FIGS. 1 to 4 and the vertical cross-sectional view in FIGS. 5 and 6, the switching rod 50 is connected to the opening 25 (35) of the mixing chamber 20 (30).
The discharge chamber 40 is disposed so as to be in contact with the discharge chamber 40 and to partially intersect with the discharge chamber 40 in a perpendicular manner. And this switching rod 50
A notch 51 is provided as described below.

That is, this notch 51 is the mixing chamber 20.
(30) allows the cleaning rod 41 to pass through, and in the position where the mixing chamber 20 (30) is opened, the mixing chamber 2
0 (30) and the discharge chamber 40 can be connected to each other. This notch 51 is usually formed to have a semicircular cross-sectional shape with the same diameter as the discharge chamber 40 as in the embodiment.

The reciprocating movement of the switching rod 50 is achieved by separating the fixed piston 53 connected to the switching rod 50 from the switching rod 50, as shown in FIGS. 1, 3, and 4. This is done by a separating piston 60. The fixed piston 53 is driven by a hydraulic cylinder 54, and its retracted position can be adjusted by a screw-type stopper 55. Symbols 56 and 57 are cylinders 54
This is the outflow inlet for hydraulic oil. A separation piston 60 provided on the opposite side of the fixed piston 53 is a hydraulic cylinder 64.
The retracted position can be adjusted by means of a screw stopper 65. Code 66 and 6
7 is a hydraulic oil outflow inlet of the piston 60.

Furthermore, reference numeral 52 indicates a keyway for preventing rotation of the switching rod 50;
15 is the key.

(Operation) Next, the present device IO will be explained in more detail along with its operation and function.

(During Mixing - Part 1) First, as shown in FIG.
and the discharge chamber 40 are connected. In this state,
Driving fluid flows in from the inlet/outlet 56 of the cylinder 54 to move the piston 53 and move the switching rod 50 to the right in the figure. In this case, the opening degree of the diaphragm opening 29 formed by the notch 51 and the opening 25 of the mixing chamber 20 and the opening degree of the outflow opening 49 to the discharge chamber 40, which vary inversely thereto, are controlled and controlled. Needless to say, is determined by adjusting the position of the stopper 65 described above.

FIG. 2 shows an enlarged view of essential parts showing the flow state of the resin components during this mixing. That is, the resin components that flow into the mixing chamber 20 from the inflow ports 21 and 22 opened by the retraction of the cylinder piston 24 collide and are stirred within the chamber 20, and then flow into the aperture opening 29.
It is introduced into the discharge chamber 40 through the notch 51. At this time, the inflow speed of the resin component M is lower in the portion M1 passing on the wall surface side of the notch 51 than in the portion M2 passing inside the wall surface 51A due to friction with the wall surface 51A. Therefore, this difference in speed causes a shearing action on the entire resin component M, and since centrifugal force is applied to the resin component M due to the change in flow velocity direction due to the notch 51, a high stirring effect is achieved in the notch 51. can get.

The resin component M thus stirred and mixed in the notch 51 further flows orthogonally into the discharge chamber 40 through the outflow opening 49 and flows into the inner wall of the discharge chamber 40, as shown in FIG. It flows down while rotating in a spiral along 40A. Therefore, the kinetic energy of the resin component M is greatly attenuated by such motion, and the resin component M is injected into a predetermined mold as a smooth flow from the discharge chamber 40.

Further, in the discharge chamber 40, the resin component M is given a rotational movement in the opposite direction to the flow direction given by the notch 51, so that the degree of mixing of the resin component M can be made homogeneous.

(When mixing is stopped) Figure 3 shows the state when mixing is stopped, that is, the mixing chamber 20 (
30) is shown in its closed state. Mixing chamber 20
(30), the main body of the switching rod 50 is connected to the opening 25 of the mixing chamber 20 (30) as shown in the figure.
(35) and is moved to a position where the notch 51 overlaps with the discharge chamber 40, that is, a position through which the cleaning rod 41 can pass. In the exemplary embodiment, this switching rod position is achieved by moving the (separation) piston 60 of the hydraulic cylinder 64 to the left in the figure. As a result, as shown in the vertical cross-sectional view of FIG. 6, the cleaning rod 41 can pass through the orthogonal switching rod 50, and the resin component remaining in the discharge chamber 40 can be discharged to the outside from its outlet. Can be done. Note that in this embodiment, the cleaning rod 4
1, not only the discharge chamber 40 but also the notch 51 of the switching rod 50 can be cleaned at the same time.

(Mixing - Part 2) FIG. 4 shows a case where another mixing chamber 30 is used. In this case, the notch 51 of the switching rod 50 is moved to a position where the mixing chamber 30 and the discharge chamber 40 are connected. Switching rod 50 in this state
As shown in the figure, the piston 53 is moved by flowing the driving fluid through the inlet/outlet 57 of the cylinder 54 and moving the piston 53 to a position regulated by the stopper 55. The piston 60 on the opposite side of the switching rod 50 is independent and separated from the rod 50 as described above. Also in this case, as described above, the opening degree of the throttle opening 39 and the opening degree of the outflow opening 49 to the discharge chamber 40 are adjusted by adjusting the position of the stopper 55. It is.

(Effects) As illustrated and explained above, according to the present invention, a mixing chamber and a discharge chamber are connected by a notch of a switching rod that is in contact with the opening of the mixing chamber and orthogonal to the discharge chamber. As a result, it has become possible to exquisitely and freely control the degree of opening between the diaphragm opening of the mixing chamber and the outflow opening to the discharge chamber in inverse proportion. Therefore, it has become possible to appropriately select the opening position of the notch portion that provides a preferable mixing state, depending on conditions such as the type of resin component and the physical properties of the molded product.

According to this invention, since the resin component is introduced into the discharge chamber from the mixing chamber through the aperture opening and the notch, and from the outflow opening, the flow of the resin component is smooth and no collision occurs as in conventional devices. Therefore, air entrainment can be avoided.

In addition, as mentioned in the detailed explanation, shearing action and centrifugal force act on the resin component passing through the notch, resulting in an excellent stirring effect6.In addition, in the discharge chamber, the rotation is opposite to that of the notch. Since the resin component flows downward in a spiral along the inner wall of the chamber, the kinetic energy of the resin component is greatly attenuated, and the resin component can be discharged in a smooth flow.

Furthermore, in the device of the present invention, even if the device is equipped with two mixing chambers, the opening degrees of the throttle opening and the outflow opening can be controlled independently.
For example, it is extremely convenient when selectively mixing resin components having different properties.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing the mixing state of a multi-component synthetic resin mixing device according to an embodiment of the present invention, Fig. 2 is an enlarged sectional view of the main parts showing its operating state, and Fig. 3 is a mixing FIG. 4 is a cross-sectional view showing the mixing chamber in the stopped state, FIG. 5 is a longitudinal sectional view showing the mixing state of this device, and FIG. 6 is the mixing stopped state. FIG. 7 is a longitudinal sectional view showing the structure of a conventionally known multi-component synthetic resin mixing device, and FIG. 8 is an enlarged sectional view of essential parts showing its operating state. 10...Multicomponent synthetic resin mixing device, 11...Main block, 20.30...Mixing chamber, 21°22
...Resin component inlet, 25...Mixing chamber opening, 29...Aperture opening, 40...Discharge chamber, 41...Cleaning rod, 49...Outflow opening, 50...・Switching rod, 51...notch, M...
・Resin component.

Claims (1)

[Claims] 1. A switching rod that is in contact with the opening of the mixing chamber and orthogonal to the discharge chamber is provided in a main body block that has a mixing chamber having an inlet for each resin component and a discharge chamber in which a cleaning rod reciprocates. is provided so as to be reciprocally movable, and the cleaning rod can pass through the switching rod at a position where the mixing chamber is closed, and the cleaning rod can pass through the switching rod at a position where the mixing chamber is opened. 1. A multi-component synthetic resin mixing device, characterized in that a cutout is formed to connect the multi-component synthetic resin. 2. The multi-component synthetic resin mixing device according to claim 1, wherein the stroke position of the switching rod is adjustable so that the opening position of the mixing chamber can be adjusted by the notch of the switching rod. 3. Claim 1 comprising two mixing chambers, each mixing chamber being configured to be selectively connected to a single discharge chamber through a cutout in the switching rod.
The multi-component synthetic resin mixing device according to item 1 or 2.