JPS6314891Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application] The present invention relates to a two-component mixing device used, for example, for mixing and discharging a resin base material and a curing agent in a two-component mixing rapid-curing resin.

[Conventional technology]

For example, in the case of two-component fast-curing epoxy resins, silicone resins, urethane resins, etc., the resin base resin and curing agent are each weighed and poured into one stirring chamber, stirred and mixed in this stirring chamber, and then discharged from the discharge port. It is becoming more and more common. Conventionally, a mixing device used for such mixing, as disclosed in Japanese Utility Model Publication No. 56-46825, has a stirring rotor housed in a cylinder, and a drive shaft protruding from one end of the stirring rotor. The stirring rotor is rotated within the cylinder through a drive shaft led out from one end of the cylinder, and the main agent and curing agent are introduced through injection pipes into the stirring chamber formed between the cylinder and the stirring rotor. The two liquids are stirred and mixed by the rotation of the stirring rotor, and the mixed liquid is discharged from a discharge port connected in the axial direction to the stirring chamber.

[Problem that the invention attempts to solve]

However, usually a rigid or flexible nozzle is connected to the discharge port, and the liquid mixture mixed in the stirring chamber is delivered through this nozzle. When the mixed liquid moves through the nozzle, the viscosity of the mixed liquid is high and the parts near the inner wall of the passage experience greater wall resistance than the parts farther away, so the flow rate is low in the part near the inner wall and the mixed liquid has a short pot life. If this is the case, the mixed liquid will settle on the inner wall of the passage, and this will harden and form a film, which will gradually grow and cause deformation of the nozzle, or the nozzle will become clogged, making it impossible to continue work. Ta.

The present invention was developed based on the above-mentioned circumstances, and its purpose is to prevent the liquid mixed in the stirring chamber from hardening in the nozzle, and to prevent the mixed liquid from clogging or deforming the nozzle. The object of the present invention is to provide a two-liquid mixing device that can smoothly supply the following substances over a long period of time.

[Means and actions for solving problems]

The present invention consists of a cylinder constituting a stirring chamber, a stirring rotor housed in the stirring chamber and rotated via a drive shaft led out from one end of the cylinder, and a stirring rotor that communicates with the stirring chamber to mix different types of materials. A plurality of injection pipes for introducing the liquid to be mixed, a nozzle connected to the stirring chamber and discharging the mixed liquid stirred in the stirring chamber, and a nozzle extending in the axial direction inside the nozzle and integrated by the stirring rotor. The rotary rod has a flat cross-section to be rotated, and the mixed liquid sent through the nozzle is disturbed and sent out by the rotary rod having a flat cross-section.
Curing within the nozzle is prevented.

〔Example〕

The present invention will be explained below based on an embodiment shown in the drawings.

In the figure, 1 is a cylindrical cylinder,
A bearing cover 3 is screwed onto one axial end of the cylinder 1 via a packing 2 made of Teflon or the like, and a discharge cover 5 is connected to the other end via another packing 4. A discharge port 6 is opened in the discharge lid 5, and a nozzle 7 is connected to the discharge port 6.

A stirring rotor 8 is housed within the cylinder 1 between a bearing cover 3 and a discharge cover 5. As shown in FIG. 2, the stirring rotor 8 has a drive shaft 9 integrally projecting from one end thereof, and this drive shaft 9 passes through the bearing cover 3 and is led out to one end side of the cylinder 1. This drive shaft 9 is rotated by a motor (not shown), and therefore the stirring rotor 8 is also rotated integrally within the cylinder 1. O-rings 10 and 11 are attached to the bearing cover 3 with spacers 12 and nuts 13.
The O-rings 10 and 11 are spaced apart from each other in the axial direction and are tightened by the nut 13 with a spacer 12 in between. The drive shaft 9 is connected to these O-rings 1.
0,11.

The stirring rotor 8 has an end wall 14 formed at one end that comes into sliding contact with the end surface of the bearing lid 3, and a partition wall 15 that is spaced apart from the end wall 14 in the axial direction. A liquid guide chamber 16 is provided in a space surrounded by the end wall 14, the partition wall 15, and the inner wall of the cylinder 1.
A stirring chamber 17 is formed in a space surrounded by the partition wall 15, the discharge lid 5, and the inner wall of the cylinder 1. The liquid introduction chamber 16 and the stirring chamber 17 are electrically connected to each other through passages formed in the partition wall 15, for example, the notched grooves 18.

A pair of injection pipes 19 and 20 are connected to the cylinder 1 . These injection pipes 19 and 20 are arranged so as to be displaced from each other in the axial direction of the cylinder 1, and one injection pipe 19 communicates with the liquid guide chamber 16, while the other injection pipe 20 opens into the stirring chamber 17.

Note that the stirring rotor 8 located in the stirring chamber 17 has widths across flats 21 and 22;
A spiral groove 23 is formed on the circumferential surface perpendicular to 2.

A rotating rod 25 is accommodated in the nozzle 7 along the axial direction. The rotating rod 25 has one end connected to the stirring rotor 8 so as to be rotated together with the stirring rotor 8, and the other end facing the open end of the nozzle 7. As shown in FIG. 3, the rotating rod 25 has a flattened cross-section, for example, a substantially rectangular shape, and is formed into a plate-like shape as a whole, so that its long side comes into sliding contact with the inner wall surface of the nozzle 7.

The operation of the two-liquid mixing device in the embodiment having such a configuration will be explained.

While the stirring rotor 8 is being rotated via the drive shaft 9, a measured amount of resin base material is supplied from one injection pipe 19, and a measured amount of curing agent is injected from the other injection pipe 20. The resin base injected from one of the injection pipes 19 enters the liquid guide chamber 16, fills the liquid guide chamber 16, and passes through the notch grooves 18 to the stirring chamber 1.
7. The curing agent supplied from the other injection pipe 20 enters the stirring chamber 17 directly. In the stirring chamber 17, the resin base material and the curing agent are stirred and mixed by the rotation of the stirring rotor 8. In this case, the stirring rotor 8 has widths across flats 21 and 22, and widths across flats 2
Since a spiral groove 23 is formed on the circumferential surface perpendicular to 1 and 22, the width across flats 21 and 22 generates a vortex in the stirring chamber 17, and the spiral groove 23 creates a bundle flow with a twist in one direction. The mixing of the two liquids is promoted. The liquid thus mixed in the stirring chamber 17 is forced out toward the nozzle 7 by generating an axial flow due to the pressure of the base agent and curing agent pumped through the injection pipes 19 and 20. Therefore, the liquid mixed in the stirring chamber 17 is discharged from the open end of the nozzle 7.

In such an embodiment, between the stirring chamber 17 and the bearing cover 3 there is a partition wall 15, a liquid guide chamber 16 and an end wall 14.
Since the stirring chamber 17 is isolated from the bearing lid 3, the mixed liquid in the stirring chamber 17 does not reach the bearing lid 3. To explain further, since the partition wall 15 and the end wall 14 are in sliding contact with the inner wall surface of the cylinder 1, these sliding surfaces not only prevent leakage of the mixed liquid, but also prevent the liquid mixture from leaking due to the resin main agent filled in the liquid guide chamber 16. This prevents the mixed liquid from flowing to the bearing lid 3 side. Only one liquid is injected into the liquid guide chamber 16, so there is no fear that the liquid will harden within the liquid guide chamber 16.

Therefore, according to this device, the mixed liquid does not enter between the drive shaft 9 and the bearing cover 3, so the frictional resistance between the drive shaft 9, the stirring rotor 8, and the bearing cover 3 due to hardening of the mixed liquid increases. This prevents problems such as the drive shaft 9 and stirring rotor 8 becoming unable to rotate, and allows smooth rotation over a long period of time.

On the other hand, the liquid mixture sent out from the stirring chamber 17 through the nozzle 7 is stirred within the nozzle 7 by a rotating rod 25 that rotates together with the stirring rotor 8. As shown in FIG. 3, the rotating rod 25 has a flat, rectangular plate shape in cross section.
The rotation of the rotating rod 25 generates turbulent flow in the mixed liquid within the nozzle 7, preventing the mixed liquid from stagnation in one place, and also because the long side of the rectangular cross section comes into sliding contact with the inner wall surface of the nozzle 7. , scrape off the mixed liquid that is about to adhere to the inner wall surface of the nozzle 7. Therefore, the liquid mixture will not settle on the inner wall of the nozzle 7, and the generation and growth of a hardened film will be prevented, so clogging and deformation of the nozzle 7 will be eliminated.
It will have a long life.

Note that the present invention is not limited to the above-mentioned embodiment, and for example, the interior of the cylinder 1 is not limited to being divided into the liquid introduction chamber 16 and the stirring chamber 17 by the partition wall 15, and the interior of the cylinder 1 is not limited to being divided into the liquid introduction chamber 16 and the stirring chamber 17. may be configured. When the inside of the cylinder 1 is partitioned by the partition wall 15 into a liquid guide chamber 16 and a stirring chamber 17, the curing agent may be supplied through one injection pipe 19 and the base agent may be supplied through the other injection pipe 20. Also rotating rod 25
is not limited to a simple plate-like shape, but may have a rectangular, oval, or elliptical cross section as long as it is flat.

[Effect of idea]

As described above, according to the present invention, the mixed liquid sent through the nozzle is agitated by the rotating rod that rotates together with the stirring rotor, preventing it from staying in one place, and preventing it from adhering to the inner wall of the nozzle. Since the mixed liquid is scraped off by the rotating rod, the generation of a hardened film is prevented, as well as the growth of the hardened film.In particular, since the rotating rod has a flat cross-sectional shape, it has a high agitation effect, and thus Maintains smooth supply over a long period of time by preventing deformation and clogging of the discharge passage.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is an overall sectional view, FIG. 2 is a side view of a stirring rotor, and FIG. 3 is a sectional view taken along the line -- in FIG. 1. 1... Cylinder, 3... Bearing lid, 5... Discharge lid, 7... Nozzle, 8... Stirring rotor, 9... Drive shaft, 17... Stirring chamber, 19, 20... Injection pipe,
25...Rotating rod.

Claims (1)

[Scope of utility model registration request] A cylinder constituting a stirring chamber, a stirring rotor accommodated in the stirring chamber and rotated via a drive shaft led out from one end of the cylinder, and a stirring rotor communicating with the stirring chamber to respectively carry different types of liquids to be mixed. A plurality of injection pipes to be introduced, a nozzle connected to the stirring chamber and discharging the mixed liquid stirred in the stirring chamber, and a cross section provided extending in the axial direction within the nozzle and rotated integrally by the stirring rotor. A two-liquid mixing device characterized by comprising: a rotary rod having a flat shape;