JP3273616B2 - Resin concrete mixing and feeding equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for mixing and supplying resin concrete. In addition, resin concrete is distinguished from resin mortar by the particle shape of the aggregate contained in it. Usually, resin concrete containing coarse aggregate with a particle size of 5 mm or more is called resin concrete and includes fine aggregate with a particle size of less than 5 mm. Although the thing is called resin mortar, the device of the present invention is not limited by the particle size of the above-mentioned aggregate, and can be used for both resin concrete and resin mortar.

[0002]

2. Description of the Related Art As a mixing and feeding apparatus for resin concrete, a technique disclosed in Japanese Patent Application Laid-Open No. 1-110104 is known, and FIG. 7 shows an overall schematic diagram. In this technique, a resin material and an aggregate are kneaded in advance to form a resin concrete material, which is sent to a mixing section 52 through a material supply port 51, and a curing agent is injected from a curing agent supply nozzle 53. The resin concrete material to which the curing agent has been added advances through the arm member 60 while being stirred and mixed by the plurality of pins 55 disposed on the outer peripheral surface of the rotating shaft 54, and is discharged from the discharge port 56.

When a material is to be supplied into a tube forming outer die in a centrifugal forming device by such a device, the arm member advances and retreats in the axial longitudinal direction of the outer die. What is necessary is just to design according to the length of the pipe to be made. However, in the centrifugal molding method in which the batch-type molding is essentially performed, since the mixing and feeding of the materials are repeated intermittently, the solidification of the resin concrete remaining in the arm member 60 during each molding batch is performed. , The cleaning operation takes time, and the production efficiency is significantly reduced. Therefore, it is conceivable to provide a hardening agent supply port at a relatively distal end position of the arm member, but it is difficult to sufficiently agitate the hardening agent because the hardening agent is in a smaller amount than the resin concrete material.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a resin concrete mixing / supplying apparatus capable of sufficiently mixing resin concrete and improving cleaning workability. It is the purpose.

[0005]

SUMMARY OF THE INVENTION The present invention, which has attained the above object, is a resin concrete mixing and feeding apparatus for feeding a resin concrete material into a tube forming outer die which rotates around an axis. Inside, an aggregate feeding section in which a screw blade is formed on the outer peripheral surface of the rotating shaft, and a stirring and mixing section in which a stirring member is provided on the outer circumference of the rotating shaft are continuously provided, and rotation of the aggregate feeding section is performed. The shaft and the rotating shaft of the stirring and mixing section are driven separately, and the casing is provided with a resin material supply port near a boundary position between the aggregate feeding section and the stirring and mixing section. The gist of the invention is that a resin supply means for mixing the fed resin and the curing agent is provided. Further, in the mixing and supply device according to the present invention, a resin material supply unit and a curing agent supply unit are provided, and a mixing passage of the resin and the curing agent is formed inside the resin supply unit. It is desirable that the resin material supply means and the curing agent supply means be communicated with each other. Further, it is recommended that a cleaning liquid supply means be provided and the mixing passage be communicated with the cleaning liquid supply means.

[0006]

FIG. 1 is an explanatory sectional view showing a typical example of the apparatus of the present invention. A rotary shaft 31 is disposed on the axis of the cylindrical mixing and feeding device 30 over substantially the entire length of the mixing and feeding device 30, and a screw blade 32 is formed on the outer peripheral surface of the rotary shaft 31 except for a part of the tip side. The hollow rotary shaft 33 is mounted around a bearing and a sealing material, and the hollow rotary shaft 33 is configured to be able to rotate independently of the rotary shaft 31. Then, the aggregate is fed forward by the rotation of the hollow rotary shaft 33. A plurality of pins 34 as an agitating member are helically protruded on the outer peripheral surface of the rotating shaft 31 at the tip portion where the hollow rotating shaft 33 is not mounted. On the surface, resin concrete discharge blades 35 composed of a plurality of flat plates are radially arranged.

On the other hand, a resin material supply unit 40 is disposed above the mixing / supplying device 30, and a resin material supply port formed in an upper portion of a casing at a boundary between the stirring section and the aggregate supplying section of the mixing / supplying apparatus. 36. Further, a resin concrete material discharge port 37 is provided at the lower end of the casing of the mixing and feeding device 30. Therefore, the mixed supply of the resin concrete is performed as follows. First, after the aggregate is supplied to a hopper (not shown), the aggregate is supplied by a screw blade 32 to a stirring unit disposed on the tip side of the mixing and supplying device 30. On the other hand, the resin material is quantitatively sent from the resin material supply port 36 to the stirring section through the resin material supply unit 40 by the compressor. In the stirring section, the aggregate and the resin material are mixed by a plurality of pins 34 projecting in a spiral shape, and at the same time, are sent toward the tip of the mixing / supplying device 30 and are not shown from a discharge port 37 by a resin concrete discharge blade 35. It is discharged inside the outer mold.
In the apparatus of the present invention, since the rotating shaft 31 and the hollow rotating shaft 33 are controlled by different variable speed motors, the rotating speed is changed according to the particle size and the component of the aggregate, the type of the resin material, etc. Materials can be mixed. Particularly, by rotating the rotating shaft 31 at a higher speed than the hollow rotating shaft 33, sufficient stirring can be performed.

[0008] The resin concrete is hardened by the action of the hardener only in the stirring and mixing section of the mixing and feeding device.
It is only necessary to rotate to discharge only the resin concrete in the stirring and mixing section and to wash only the relevant section. Further, in the cleaning, the supply of the resin material containing the curing agent is stopped, only the aggregate is fed, the rotation shaft 31 is again rotated to discharge the aggregate, and the cleaning liquid is supplied from the resin material supply port 36. Then, the stirring and mixing section and the casing wall can be completely cleaned by the centrifugal force of the rotating shaft 31, and the hardening inside the mixing and feeding device can be more reliably prevented.

The present invention is not limited by the agitating member provided in the agitating section. In addition to the above-mentioned plurality of helically projecting pins, a single or double ribbon helical band wing or an aggregate feeder. A screw blade having a supply hole is exemplified.

FIG. 2 is an explanatory sectional view showing another embodiment of the apparatus of the present invention. Separate rotating shafts 33a and 38 are coaxially disposed in the stirring and mixing section and the aggregate feeding section, respectively, and the rotating shaft 38 of the stirring and mixing section is driven by a motor 39 disposed at the distal end thereof. Is what is being done.

As described above, the apparatus of the present invention may be configured so that the rotating shafts of the stirring / mixing unit and the aggregate feeding unit can be driven separately. Depending on the position of the driving motor and the method of arranging the rotating shaft, etc. It is not limited.

In the present invention, the resin and the curing agent are mixed in advance to ensure that the curing reaction between the resin and the curing agent proceeds. The resin and the curing agent are separately fed and mixed immediately before stirring. And a resin supply unit that can be used.
Therefore, the cleaning operation becomes very easy, and the productivity can be further improved.

FIG. 3 shows an example of such a resin supply unit. A resin material supply passage 41 connected to a resin material supply device (not shown) communicates with a mixing passage 43 via an opening / closing valve 42, while a curing agent supply passage 44 connected to a curing agent supply device (not shown) connects an opening / closing valve 45. Through the mixing passage 43. A cleaning liquid supply passage 46 connected to a cleaning liquid supply device (not shown) communicates with the mixing passage 43 via an on-off valve 47. Accordingly, in the mixing passage, the resin material or the cleaning liquid to which the curing agent has been added is sent out from the discharge nozzle 48 connected to the resin material supply port 36 of the mixing and supply device 30 to the mixing and stirring section.

The mixing and feeding apparatus according to the present invention can be applied to a resin concrete pipe centrifugal forming apparatus as shown in FIGS. The rotation mechanism of the outer tube forming die 14 is the same as the conventional one. As shown in FIG. 5, the outer tube forming die 14 having the forming jig 13 mounted on the rotating rollers 12 connected to the drive motor 11 is provided. It is mounted rotatably. The carriage 20 is mixed feed device 30 moves the X ₁ -X ₂ direction is constituted so as to be insertable and withdrawn into the hollow portion of the pipe molding outer die 14.

FIG. 6 shows a truck 2 of the mixing and feeding apparatus according to the present invention.
It is a partially broken explanatory view showing a typical example of 0.

The carriage 20 is placed on a pedestal 26 on a hopper 21.
And the rotating shaft drive unit 22. The aggregate 25 put into the hopper 21 is fed by a screw blade 32 formed on the outer peripheral surface of the rotating shaft 31 on the front side (not shown) having an aggregate supply port (not shown). Right).

The seal between the hopper 21 and the rotary shaft 31 is sealed by a packing 24 to prevent the aggregate 25 from entering the rotary shaft drive unit. It is desirable to prevent the aggregate 25 from biting into the packing 24. Examples of the shape of the cover include cylindrical and semi-cylindrical shapes and inverted U-shaped cross sections.

Further, the method of the present invention is not limited by the resin concrete material. Examples of the aggregate include crushed stone and / or a mixture of silica sand and an inorganic fine powder filler (silica powder, calcium carbonate, etc.). Used
Examples of the resin include an unsaturated polyester resin and the like, and a general room temperature curing agent may be added.

[0019]

Since the apparatus of the present invention is constructed as described above, it is possible to provide a resin concrete mixing / supplying apparatus which can sufficiently mix the resin concrete material and can easily perform the cleaning operation.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view showing a typical example of a mixing and feeding device according to the present invention.

FIG. 2 is an explanatory sectional view showing another embodiment of the mixing and feeding device according to the present invention.

FIG. 3 is a sectional explanatory view showing a typical example of a resin material supply unit connected to the apparatus of the present invention.

FIG. 4 is a schematic explanatory view showing a centrifugal molding manufacturing apparatus to which the apparatus of the present invention is applied.

FIG. 5 is an explanatory view as viewed in the direction of arrow I, showing the operation state of FIG. 4;

FIG. 6 is a partially cutaway explanatory view showing a typical example of a truck of the mixing and feeding device according to the present invention.

FIG. 7 is a schematic explanatory view showing a conventional resin concrete mixing device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Centrifugal molding apparatus 20 Dolly 30 Mixing supply apparatus 40 Resin material supply unit

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshiyuki Tsujiuchi 5-8, Nishiobari-cho, Suita-shi, Osaka Nippon Shokubai Chemical Industry Co., Ltd. Resin Research Laboratory (72) Inventor Hidenori Katayama 5 Nishi-Owarimachi, Suita-shi, Osaka No. 8 Nippon Shokubai Chemical Industry Co., Ltd. Suita Works (72) Inventor Yoshiteru Sonoda 5-1 Higashiawaji, Higashiyodogawa-ku, Osaka-shi (56) References JP-A 57-165420 (JP, U) JP-A 60- 98611 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B28B 1/00-23/22 B29B ⁷ /00-11/14 B29B 13/00-15/06 B29C 31/00 -31/10 B29C 37/00-37/04 B29C 71/00-71/02 B28C 1/00-9/04

Claims (3)

(57) [Claims] An apparatus for feeding a resin concrete material into an outer mold for forming a tube, which rotates about an axis, wherein a casing has screw wings formed on an outer peripheral surface of a rotating shaft. And a stirring / mixing unit in which a stirring member is provided on the outer periphery of the rotating shaft is continuously provided, and the rotating shaft of the aggregate feeding unit and the rotating shaft of the stirring / mixing unit are driven separately. A resin material supply port is formed near a boundary position between the aggregate supply section and the stirring and mixing section, and a resin supply means for mixing a separately supplied resin and a curing agent is provided above the resin material supply port. A resin concrete mixing and feeding device. 2. A resin material supply means and a curing agent supply means, and a mixing passage of a resin and a curing agent is formed inside the resin supply means. The mixing and supplying device according to claim 1, wherein the mixing and supplying device is connected to a curing agent supplying unit. 3. The mixing and supply device according to claim 2, further comprising a cleaning liquid supply means, wherein said mixing passage is communicated with said cleaning liquid supply means.