JP2573156B2 - Material mixing head for synthetic resin foam production - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a material mixing head used in an apparatus for producing a synthetic resin such as a phenolic resin foam.

[0002]

2. Description of the Related Art In general, a synthetic resin such as a resol-type phenol resin foam is excellent in water absorption and water retention.
It is widely used as a sword mountain application for fresh flowers, that is, as a flower staying material. However, it is manufactured in a relatively large block by a batch method and cut into a substantially brick size by a cutting device.
Conventionally, a material mixing head is used in the production of this kind of foam, and the mixing head is such that a main agent and a curing agent, a secondary agent such as a foaming agent are injected into a mixing chamber, mixed, and pressure-poured out. Is configured.

[0003]

However, since the conventional material mixing head can not sufficiently stir the material,
There is a problem that the foaming rate of the foam to be produced is not uniform and a foam of good quality cannot be obtained. The present invention has been made in view of the above-described circumstances, and aims to stably produce a foam having a uniform foaming rate and good quality, and has a high product yield and a high productivity. An object of the present invention is to provide a material mixing head for producing a synthetic resin foam.

[0004]

According to the present invention, the following technical measures have been taken in order to achieve the above object. That is, the present invention provides a cylindrical material mixing chamber provided with a mixed material discharge nozzle at the lower end at the lower portion of the mixing head main body, and disperses an agitating mixing rotor that rotates around a vertical axis in the mixing chamber. A structure in which a synthetic resin main agent and auxiliary agents such as a curing agent and a foaming agent can be injected from the head body side into the upper part of the material mixing chamber.
Then, a partition plate is radially inserted into the mixed material discharge nozzle.
It is characterized by being arranged in .

Further, according to the present invention, at the upper end of the rotor,
An annular material receiving portion centered on the axis is formed, and a plurality of helical material openings are provided on the outer peripheral wall of the receiving portion, and helical stirring and mixing are provided on the outer periphery below the opening. A blade is provided in a plurality of stages, and a plurality of notches are provided in at least one of the mixing blades.

[0006]

According to the present invention, the main agent and the auxiliary agent supplied from each supply line of the mixing head body to the mixing chamber flow into the material receiving portion of the rotating rotor, and are mixed by centrifugal force while being mixed. It is radially discharged from the opening of the receiving portion and moves downward along the inner wall of the mixing chamber, and is stirred while being swirled by the helical stirring and mixing blade, and is mixed and discharged to the mixed material discharge nozzle. As a result, the turning of the sufficiently mixed material is stopped by the partition plate,
It is exhaled without entraining the surrounding air straight.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In the drawings, reference numeral 1 denotes a material mixing head, and a mixing head main body 5 which is exchangeably mounted on a lower surface of a flange 3 of the mount mounting head 2 of a gantry movable up and down, front and rear, and left and right by a bolt 4. A rotor shaft 10 penetrating through a shaft hole 6 provided vertically in the main body 5 and a vertical hole 7 of the mounting portion 2 and rotatably mounted on bearings 8 and 9; A cylindrical jacket 12 attached to the shaft hole 6 by bolts 11 concentrically therewith.
A mixing chamber 13, a material discharge nozzle 14 detachably attached to a lower end of the mixing chamber 13,
And an agitating mixing rotor 15 exchangeably fixed to the lower end of the rotor shaft 10 therein.

[0008] The head mounting portion 2 comprises a water-cooled jacket 1
A cooling water inlet 17 is provided at the lower part of the structure, and a stopper 18 for fixing (preventing rotation) the rotor shaft 10 when replacing the rotor 15 is attached.

The mixing head main body 5 is divided into upper and lower parts to facilitate cleaning of a material supply line or main agent line A and a hardener / foaming agent line or auxiliary agent line B. In the right and left sides of the shaft hole 6, there are provided switching valves 19, 2 for switching between the materials for the lines A and B and the solvent.
Zero fitting holes 21 and 22 are provided orthogonal to the shaft hole 6 and parallel to each other and in a penetrating manner.

The valves 19 and 20 are rotatably inserted from the front side through the sleeves 23 and 24 into the fitting holes 21 and 22, and the material supply pipe joints 25 and A dye supply fitting 26 is mounted in communication. The valve 19 has a cylindrical shape, and has a main material passage 27 penetrating a rear end portion thereof in a radial direction from the axial direction.
On its front side, it is orthogonal (90 degrees) radially outward from the center
Are provided with solvent passages 28 (see FIG. 3a).

A main agent passage 29 is provided on the lower side of the sleeve 23 in correspondence with the main agent outlet 27A of the valve 19 so as to communicate with the main agent passage 30 of the upper body 5A. A groove 31 communicating with the solvent passage 28 is provided. As shown in FIG. 2, the upper body 5A and the sleeve 23 are provided with solvent supply paths 32 and 33 on the side surfaces.

The bulb 20 has a cylindrical shape, and is provided at its rear end with a dye passage 34 penetrating in the radial direction from the axial direction. Curing agent passage 35 and foaming agent passage 3 at right angles
6 are provided. The dye passage 34 is provided in the joint 2
6 and 26A. The sleeve 2
4 have openings 37, 38, 39 on the upper, lower, and right sides corresponding to the passages 35, 36, respectively.
Through holes 40 and 41 are provided below.

Further, a sleeve 24 is provided on the upper body 5A.
Corresponding to the upper ports 37, 40, the solvent supply path 4
2, 43, 44 are provided, respectively,
9, a curing agent supply passage 45 and a foaming agent supply passage 46 are provided, and a dye passage 47, a curing agent passage 48, and a foaming agent passage 49 communicate with the lower passages 38, 38, 41. Is provided. A seal ring 51 is fitted to a lower portion of the shaft hole 6 via a casing 50.

The front ends of the valves 19 and 20 project forward from the upper body 5A, and the sectorial gears 52 and 53 are attached to the projecting ends so as to mesh with the pinions 54 provided on the inner side facing each other. An operation handle 55 is provided on the pinion 54. By operating the handle 55, the two valves 19 and 20 are simultaneously and simultaneously rotated in a range of 90 degrees so that the passages can be switched. It is.

In the lower body 5B of the head body 5, a bearing 9 is inserted into a shaft hole 6 thereof, and the main agent passage 30,
Communication passages 56, 57, 58, 59 are provided corresponding to the passages 47, 48, 49 of the dye, the curing agent, and the foaming agent, respectively. Each of the injection nozzles 61 is attached. In addition, these nozzles 60 and 61 are connected to the lower body 5B.
The upper surface of the mixing chamber 13 is provided concentrically with the shaft hole 6 on the lower surface of the mixing chamber 13 and is arranged so as not to interfere with the rotor 15.

The lower portion of the mixing chamber 13 is sequentially reduced in diameter to form a hopper, and the lower end of the material discharge nozzle 1
4 is interchangeably screwed. Here, 62 is a cooling water inlet of the jacket 12, and 63 is a cooling water outlet. Further, the discharge nozzle 14 is provided with a radially extending cross-shaped cross-section, single-letter, and Y-shaped partition plate 64 in the upper portion thereof, and stops the turning motion of the material mixed by the partition plate 64. The material is allowed to flow straight down, so that the surrounding air is not entrained when it exits the nozzle 14.

The rotor 15, as shown in FIG.
Four stirring mixing parts 15A, 15 from the top
B, 15C, and 15D, an annular material receiving portion 65 formed around the axis of the mixing portion 15A at the upper end is formed, and a plurality of spiral material passages 66 are formed on the outer peripheral wall of the receiving portion 65.
Is provided. A shaft hole 67 and a screw hole 68 are provided at the center of the upper end, and are screwed into the lower end of the rotor shaft 10 in a replaceable manner.

Further, the second mixing section 15 of the rotor 15
On the outer peripheral surface of B, a plurality of spiral stirring mixing blades 69 are provided, and the blades 69 are provided with notches 70 at predetermined intervals, and the material flows backward from the notches 70, The kneading effect is enhanced. Further, a plurality of spiral stirring mixing blades 71 are provided on the outer peripheral surface of the third mixing section 15C,
The blades 71 are also provided with cutouts 72 at predetermined intervals, and the material is made to flow backward in the same manner as described above to enhance the kneading effect. A plurality of spiral stirring blades 73 are provided on the outer periphery of the fourth mixing section 15D.

The stirring blades 69, 71, 73 are
In addition to agitating and mixing the materials, they also serve to sequentially transfer the materials downward. In the drawings, the mixing unit 1
Although 5A is divided from the other mixing section 15B and the like, it is of course that it may be formed integrally. Further, the spiral material passage 66 and the stirring mixing blades 69, 71, 73 are shown in FIG.
6 , the material is twisted so as to be lowered in the rotation direction of the rotor 15 as indicated by the arrow A, so that the material can be effectively and sufficiently inverted and kneaded.

In FIG. 1, reference numerals 74 and 75 denote plugs for closing the communication passages 56 to 59, which are opened and closed when these passages are cleaned. In the above embodiment, the mixing chamber 13 has a jacket 2 structure, but the jacket 2 can be omitted. Further, although the lower hopper portion of the mixing chamber 13 is formed as a separate body, it can also be formed as an integral body.

In the above embodiment, when mixing the materials, first, as shown in FIGS.
9 and 20, the main agent supply passage 25A and the main agent passage 3
0, auxiliary agent supply paths 26A, 39, 39 and auxiliary agent passages 38, 4
When the material, the hardening agent, the foaming agent and the like are supplied while the rotor shaft 10 is being rotated while the rotor shaft 10 is rotating, the valves 19,
Through 20, a material or the like is injected from each of the injection nozzles 60 and 61 into the material receiving portion 65 of the rotor in the mixing chamber 13.

The material in the receiving portion 65 flows out of the spiral material passage 66 to the outer peripheral side of the rotor 15 while being mixed by the rotation of the rotor 15, and descends while being mixed to the second mixing portion 15B. Here again, while stirring and mixing, the third. The mixture is sufficiently mixed through the fourth mixing sections 15C and 15D, rectified by the partition plate 64 of the discharge nozzle 14, flows out of the lower end of the nozzle 14 as a straight laminar flow, and falls into a molding conveyor or a molding die. I do.

Therefore, after the mixing of the materials is completed, the valves 19 and 20 are respectively operated by the operating handle 55 for 90 minutes.
And then switch to the solvent supply paths described above, flow the solvent through the main agent line A and the auxiliary agent line B, respectively, and dissolve the material, dye, curing agent, and foaming agent remaining in the lines A and B and flow out. This prevents the lines A and B from being closed.

The present invention is not limited to the above embodiment. For example, each of the valves 19 and 20 can be separately driven to rotate, and the number of passages of the valve 20 is also limited to the number of auxiliary agents.
It can be increased or decreased as appropriate according to the type or the like, and furthermore, the design can be changed as appropriate.

[0025]

According to the present invention, as described above, a cylindrical material mixing chamber provided with a mixed material discharge nozzle at the lower end is provided at the lower portion of the mixing head body, and the mixing chamber rotates around the vertical axis. An agitating mixing rotor is provided so that a synthetic resin base material, a solvent, a curing agent, a foaming agent, and the like can be injected into the upper portion of the material mixing chamber from the head main body side , and the mixed material discharger is provided.
In come out nozzle, because characterized in that it has disposed partition plates radially Ki out to perform the stirring mixture of synthetic resin material sufficiently, stop the swirling flow of the mixed materials
Stop and rectify it into a straight layer to flow from the discharge nozzle.
To prevent the entrainment of surrounding air, stabilize the quality by making the foaming rate uniform, and produce a good quality foam,
Productivity can be increased by improving the yield.

Further, according to the present invention, at the upper end of the rotor,
When an annular material receiving portion centered on the axis is formed,
A plurality of spiral material openings are provided on the outer peripheral wall of the receiving portion.
And a plurality of spiral stirring blades on the outer periphery below the passage.
Stage, and at least one of the mixing blades has a plurality of stages.
Is it characterized by notches provided?
Materials and curing agents, foaming agents, dyes, surfactants, etc.
Perform thorough and reliable mixing to improve product quality.
Can be

[Brief description of the drawings]

FIG. 1 is a central longitudinal sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIGS. 3 (a) and 3 (b) are perspective views showing the relationship between the two valves of the embodiment and their material communication passages at the time of communication.

FIGS. 4A and 4B are perspective views showing the relationship between the two valves of the embodiment and the material communication passage when the valve is closed.

FIG. 5 is a partial longitudinal front view of the stirring mixing rotor of the embodiment.

FIG. 6 is a plan view of FIG. 5;

[Explanation of symbols]

1 material mixing head 5 mixhead body 10 rotor shaft 13 mixing chamber 14 the mixed material ejecting nozzle 15 stirred mixture low motor 6 4 partition plate 65 material receiving portions 66 et helical material feed apertures 69 stirred mixture wings 70 notch 71 stirred mixture wings 72 Notch 73 Stirred mixing blade

Claims (2)

(57) [Claims] A cylindrical material mixing chamber provided with a mixed material discharge nozzle at a lower end at a lower portion of the mixing head body;
A stirring mixing rotor that rotates around a longitudinal axis is provided in the mixing chamber, and a synthetic resin main agent and auxiliary agents such as a curing agent and a foaming agent can be injected into the upper portion of the material mixing chamber from the head body side. And a partition plate in the mixed material discharge nozzle.
A material mixing head for producing a synthetic resin foam, characterized by radially disposing . 2. An upper end of the rotor centered on its axis.
An annular material receiving portion is formed, and an outer periphery of the receiving portion is formed.
A plurality of spiral material openings are provided on the wall, and below the openings,
Spiral agitating blades are provided on the outer periphery in multiple stages.
A plurality of notches are provided in at least one of the mixing blades
The material mixing head for producing a synthetic resin foam according to claim 1, wherein: