JPH0541722U - Biaxial mixer - Google Patents

Abstract

(57) [Abstract] [Purpose] A high-quality ready-mixed concrete is manufactured by devising the method of rotating the kneading shaft of a twin-screw mixer to effectively mix the materials. A vibration transmitting arm 12 is fixed to the ends of the kneading shafts 3 and 3'of the biaxial mixer 1 in the radial direction thereof, and the vibration transmitting arms 12 have a circumference of the kneading shafts 3 and 3 '. A pneumatic vibrator 13 that generates vibration in the direction is attached. Then, the pneumatic vibrator 13 is vibrated to give vibration in the circumferential direction of the kneading shafts 3 and 3 ′, the vibration is transmitted to the kneading blade 6, and the material is kneaded while vibrating the kneading blade 6. Due to the vibration of the kneading blades 6, the moving speed and moving direction of the material can be changed to sufficiently infiltrate the cement between the gravel and the sand, so that high quality green concrete can be manufactured.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a twin-screw mixer that mixes gravel, sand, cement, water, and an admixture to produce ready-mixed concrete.

[0002]

[Prior Art]

 In a conventional twin-screw mixer, two parallel kneading shafts that rotate in opposite directions are arranged in the kneading tank, a large number of arms are radially fixed to the kneading shaft, and a kneading blade is attached to the tip of the arm. The materials are kneaded by rotating the kneading shafts in opposite directions by a driving motor and moving the materials by kneading blades.

[0003]

[Problems to be solved by the device]

 In order to produce high-quality ready-mixed concrete, it is desirable that the crust of cement is uniformly formed around the gravel and sand that are kneading materials, but in the conventional twin-screw mixer, kneading is performed. Since the blades are structured to rotate at a constant speed in a certain direction, the kneading blades move in the same direction with the same relative speed between the various materials due to rotation. Therefore, if the moving speed of each material is the same and each material moves in the same direction, the chance of cement invading between the gravel and the sand is small, so that it is necessary to form a uniform cement shell around the gravel and sand. It is necessary to spend sufficient time to knead.

In view of the above points, the present invention effectively kneads materials not only by moving the materials by the kneading blades but also by making the moving speeds among various materials different by the kneading blades. The purpose is to provide a two-axis mixer devised in this way.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention provides a twin-screw mixer for kneading various materials by rotating two parallel kneading shafts arranged in a kneading tank in opposite directions by a driving motor. A vibration transmitting arm is fixed to the shaft end of the kneading shaft in the radial direction, and a vibrator for applying vibration in the circumferential direction of the kneading shaft is attached to the vibration transmitting arm.

[0006]

[Action]

 According to the present invention, the vibrator attached to the vibration transmitting arm at the shaft end of the kneading shaft is driven to generate vibration in the circumferential direction of the kneading shaft. As a result, the vibration is transmitted to the kneading shaft via the vibration transmitting arm, and the kneading blades attached to the kneading shaft rotate while vibrating in the circumferential direction. This vibration of the kneading blade hits the kneading material, which changes the moving speed of the kneading material and increases the chances of allowing cement to enter between the gravel and sand.

[0007]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings.

Reference numeral 1 is a twin-screw mixer for kneading materials such as gravel, sand, cement, water, and an admixture to produce green concrete, and two parallel kneading shafts 3 and 3 are provided in a kneading tank 2. ′ And is rotatably supported by a bearing 4 fixed to the kneading tank 2. A large number of arms 5 are radially arranged on the kneading shafts 3 and 3 ', and a kneading blade 6 having an appropriate angle is attached to the tip of the arms 5. Gears 7 and 7'are attached to one ends of the kneading shafts 3 and 3'and meshed with each other so that the kneading shafts 3 and 3'are rotated at a synchronous speed. The sprockets 8 and 8'are attached to the other ends of the kneading shafts 3 and 3 '. Driving motors 9 and 9'are arranged on the sides of the sprockets 8 and 8 ', and the sprockets 10 and 10' attached to the driving motors 9 and 9'and the sprockets 8 and 8'are chained. The kneading shafts 3 and 3'are rotated by driving motors 9 and 9 ', which are connected to each other by 11 and 11'.

Reference numeral 12 is a vibration transmitting arm for transmitting vibration to the kneading shafts 3, 3 ′, which is fixed to one end of the kneading shafts 3, 3 ′ in the radial direction of the shaft. A pneumatic vibrator 13 driven by air is attached to the tip of the vibration transmitting arm 12. This pneumatic vibrator 13 employs, for example, a piston vibrator that generates a vibrating force in one axis direction, and the vibration generated by this piston vibrator causes the vibration in the circumferential direction of the kneading shafts 3, 3 ', that is, the kneading shafts 3, 3 immediately. Attach it so that it matches the tangential direction of the virtual circle centered on '.

Reference numeral 14 denotes a rotary joint for supplying compressed air to the pneumatic vibrator 12 that rotates together with the kneading shafts 3, 3 ′, and the rotary joint 14 has its center of rotation at the shafts of the kneading shafts 3, 3 ′. It is fixed to a support frame 15 attached to the kneading tank 2 so as to match the heart. One side of the rotary joint 14 is connected to the pneumatic vibrator 13 by an air pipe 16, and the other side is connected to a compressed air supply source (not shown) by an air pipe 17.

When kneading green concrete with the twin-screw mixer 1, the driving motors 9 and 9 ′ are driven to rotate the kneading shafts 3 and 3 ′ to measure a predetermined amount of gravel, sand, and sand. Ment, water, and an admixture are sequentially charged into the kneading tank 2 to start kneading. Then, during kneading, compressed air is supplied to the pneumatic vibrator 13 to vibrate the vibrator 13. This vibration is transmitted to the kneading shafts 3 and 3'through the vibration transmitting arm 12 and vibrates the kneading shafts 3 and 3'in the circumferential direction. Then, the vibration of the kneading shafts 3, 3'is transmitted to the kneading blades 6 via the arm 5 attached to the kneading shafts 3, 3 '. As a result, the kneading blades 6 rotate while vibrating, which gives vibrations to the kneading materials to change the moving speed of each material, increasing the chances of cement entering the gravel and sand. It can mix efficiently and can produce high quality ready-mixed concrete.

Although the pneumatic vibrator 13 uses a piston vibrator, a rotary small vibrator that generates vibration by rotating a roller or a ball may be used instead of the piston vibrator, but these vibrators are used. In order to avoid mechanical damage by giving vibration to the kneading shafts 3 and 3'in the radial direction, for example, two rotary vibrators are attached to cancel the radial vibrations of the shafts and kneading. It is preferable to devise such as applying vibration only in the circumferential direction of the shaft. An electric vibrator can be used instead of the pneumatic vibrator. It goes without saying that it can also be applied to single-axis type and multi-axis type mixers.

[0013]

[Effect of the device]

 As described above, according to the present invention, the pneumatic vibrator 13 is attached to the kneading shafts 3 and 3 ′, the kneading shafts 3 and 3 ′ are vibrated in the circumferential direction by the vibrator 13, and the kneading blades 6 remove the material. Since kneading is done by tapping, the moving speed of each material is changed and the moving direction is also changed, and the cement is sufficiently penetrated between the gravel and sand to form a uniform cement shell around the gravel and sand. Can be expected to produce high quality ready-mixed concrete.

[Brief description of drawings]

FIG. 1 is a front view of the present invention.

FIG. 2 is a plan view of the above.

FIG. 3 is a side view of the above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Two-axis mixer 3, 3 '... Kneading shaft 6 ... Kneading blade 12 ... Vibration transmission arm 13 ... Pneumatic vibrator 14 ... Rotary joint 16, 17 ... Air pipe

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Kenichi Umezawa Ichikoh Co., Ltd., 1013 Eijima, Okubo-cho, Akashi-shi, Hyogo

Claims (1)

[Scope of utility model registration request] 1. A biaxial mixer for kneading various materials by rotating two parallel kneading shafts arranged in a kneading tank in opposite directions by a driving motor, and transmitting vibration to the shaft end of the kneading shaft. A biaxial mixer in which a vibration arm is fixed in a radial direction, and a vibration generator that vibrates in the circumferential direction of the kneading shaft is attached to the vibration transmission arm.