JP2004338309A - Low noise type production line for concrete product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To eradicate bad conditions including fouling and noise caused by powder dust etc., from a working environment in order to produce a concrete product by keeping the working environment good. <P>SOLUTION: A low noise type production line for a concrete product has a metering part 23 for metering raw materials, a kneading part 24 for agitating the metered raw materials by using a defoaming mixer, a packing part 26 in which the kneaded materials are packed in a form by using a quantitative packing machine (25) and which does not need vibration for slanting the form 11 while the form is deaerated, and a curing part 27 for settling the form 11 filled with the kneaded materials. The metering part 23, the kneading part 24, and the packing part 26 are arranged along a working line. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a low-noise type production line for producing a concrete product mainly composed of cement.
[0002]
[Prior art]
A concrete product is obtained by putting a mixture of cement, aggregate, and water into a mold, setting the mixture, and removing the mixture from the mold to obtain a product. In the work process, since powder, sand, gravel, and the like are handled, the work environment is liable to be contaminated, and it has to be manufactured under unfavorable conditions for sanitation. This situation occurs because dust is scattered when the raw material is transported by a truck or a forklift and opened in a container. In addition, when the mixture is filled into the mold, it is necessary to apply vibration to the mold by means of a device commonly called a vibrator so that the mixture can be spread to all corners of the mold. Therefore, it has been the norm that the working environment of factories that manufacture concrete products is not good.
[0003]
[Problems to be solved by the invention]
The inventor of the present invention has conducted research to establish a technique for producing a concrete product while maintaining a favorable working environment, and has reached the present invention. Therefore, an object of the present invention is to eliminate bad conditions such as contamination due to dust and noise at the time of filling from a working environment for manufacturing a concrete product.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a measuring section for measuring raw materials, a kneading section for stirring a plurality of measured raw materials using a defoaming mixer, and a kneaded material, using a quantitative filling machine. A shaping part that fills the mold and tilts the mold while evacuating the air inside the mold, and a curing part that sets the mold filled with the kneading material. In this method, a unit, a kneading unit, and a filling unit are arranged along a work line.
[0005]
The types of concrete products handled by the present invention should not be limited at all. However, as an example, it is possible to produce a thin concrete product, for example, a box-shaped block or a panel-like member that fills the soil and contributes to greening of the structure. In addition, it is also possible to manufacture statues of animals and the like and other irregular shapes.
[0006]
In the low-noise production line according to the present invention, all raw materials have fine particles or properties close to fine particles. In the present invention, the fine particles have a diameter of 200 μm or less, and these raw materials are measured by a measuring section. Raw materials are, for example, cement, aggregate or silica sand and fiber as a reinforcing material, pigment as a coloring agent, to improve the workability without increasing the water content, or to reduce the amount of water to maintain the workability It consists of a water reducing agent and water as additives used (see FIG. 2), a tank truck (ta in FIG. 2), a dump truck (da in FIG. 2), a truck (g in FIG. 2), or a pump (po in FIG. 2). ) Is sent to the measuring section. The raw materials undergo an acceptance inspection as shown in FIG. 2 as “received” and are stocked in a stock yard indicated as “su”. The raw material storage form up to weighing (delivery state) is as follows: cement is a simple mobile silo (simple in Fig. 2), silica sand is a flexible container (f in Fig. 2), and fiber and pigment are bags (bag in Fig. 2). ), The water reducing agent is put in a can (the can in FIG. 2), and the like, and is measured by a measuring machine in the measuring section.
[0007]
It is desirable that the weighing machine be capable of accurately weighing continuously supplied raw materials. For this purpose, a so-called batch type weighing machine having a hopper that does not cause bridging and a positive displacement feeder can be suitably used. A plurality of hoppers are used depending on raw materials. For example, fibers and pigments or water and water reducing agents can be handled by a common hopper.
[0008]
The kneading unit is a place where a plurality of measured raw materials are stirred by a defoaming mixer. The degassing mixer is optimally a vacuum exhaust type, also called a vacuum stirrer, and by using this, even high viscosity materials are surely defoamed and kneaded with a simple mixer. This is also advantageous for the purpose of the present invention since the strength is higher than that of the above and the quality is stabilized.
[0009]
The kneaded material kneaded through the stirring process is a material immediately before the concrete product, which contains all the necessary components, and after that, no matter who uses any mold, it is manufactured by the manufacturing line of the present invention. Products with little difference can be easily made. Therefore, the kneading material is a high-quality molding material that has been subjected to precise weighing and a certain level of quality assurance, and can be distributed to other factories or sold to third parties. In this case, the kneading material can be transferred to a bag-packing step and bagged by a sealing machine.
[0010]
The filling section is where the kneading material is filled into the mold. Prior to filling, it is desirable to perform a quality inspection by visually inspecting the properties of the ready-mixed concrete or performing a slump test, for example. The filling is performed by using a fixed-quantity filling machine, and the kneading material is filled in the mold while the air is being degassed. It is desirable to use a so-called MONO pump having a corrugated rotor as the fixed-quantity filling machine, and the conventional vibrating work can be omitted in the filling operation using the fixed filling machine using the MONO pump.
[0011]
The curing section is a place where the mold filled with the kneading material is fixed until the mold is released. The measuring section, the kneading section, and the filling section are arranged along a work line, and the work line has means for moving the formwork. The means for moving the formwork includes, for example, a carriage on which the formwork is mounted, a conveyor for moving the formwork, and the like. The curing unit is disposed at the end of the work line or at a location away from the work line.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a low noise type production line for a concrete product of the present invention will be described with reference to the illustrated embodiment. FIG. 1 illustrates a plan layout of a production line 10 according to the present invention, in which a work line for connecting each work unit is provided. The illustrated working line is composed of a cart 12 on which a form 11 is placed and a conveyor 13 for moving the cart 12, and a filling section working line 14, a removing section working line 15, and a filling section removing section both working lines 14, 15. And a feed trolley work line 17 for sending the trolley to the trolley storage area 20. At connection points between the lines 14 to 17, turntables 18 and 19 for changing the direction of the trolley 12 are provided. Is provided.
[0013]
The filling section work line 14 is installed in a section where the operation of filling the raw material into the form 11 is performed. In this section, a silo 21 of silica sand and a silo 22 of cement, which are simple aggregates, , A kneading unit 24 having a vacuum defoaming stirrer for mixing raw materials, and a filling unit 26 having a mono pump 25 in a hopper. The conveyor 13 'of the filling section work line 14 is provided with a tilting function for performing a filling operation by inclining the mold 11 so that the raw material filling port is at the highest position while placing the formwork 11 thereon.
[0014]
The trolley storage area 20 and the curing unit 27 are communicated by a quiet transfer device 28 such as a small battery lift vehicle, and the form trolley that is undergoing further curing is moved to the trolley storage area 30 located at the end of the curing unit work line 15. Sent gradually to. When a high-quality molding material manufactured through the kneading unit 24 is sold, the material is sent from the kneading unit 24 to the bag filling unit 29 so that it can be shipped as a kneaded material in a sealed bag.
[0015]
The low-noise type production line 10 of the present invention configured as described above includes silos 21 and 22, a measuring unit 23 including a batch type measuring machine, a kneading unit 24 including a vacuum defoaming stirrer, and a filling unit having a mono pump in a hopper. 26, and the working units are connected to each other by a conveyor of the working lines 14 to 17 and a quiet conveyor 28. Therefore, the fine particles do not scatter, the working environment is not polluted, and the operation environment is kept quiet.
[0016]
When a concrete product is manufactured by the low noise type manufacturing line 10 of the present invention, raw materials are carried into the measuring unit 23 from each stock yard as described above, the required amount is measured, and the raw material is kneaded and stirred with water in the kneading unit 24. . FIG. When a kneaded material in a sealed bag is produced, the kneaded material is packed in a bag so that it can be shipped.
[0017]
The kneading material is filled in the mold 11 having the filling port at the top by inclining the conveyor 13 ′ in the filling section 26 having the mono pump 35. Since the kneaded material previously stirred under vacuum defoaming conditions is fixedly filled by the mono pump 25 in this step, no air bubbles remain in the kneaded material, and no air bubbles remain in the mold 11. Absent. After the quantitative filling operation is completed, the form 11 is transported from the carriage storage area 20 to the curing unit 27 by the transport unit 28, and the primary curing is performed. FIG.
[0018]
The kneading material-filled formwork after the primary curing period has been transferred to the removing part work line 15 and starts to remove the concrete, and the concrete product is taken out. On the other hand, the formwork 11 performs the cleaning operation and the release agent applying operation. After that, it is sent to a communication work line 16 between both lines of the filling section and the demolding section for the mold assembly work. See FIG. The removed concrete product is transferred to the secondary curing as it is or after reworking, but those that do not work are discarded. Concrete products that have passed the secondary curing period are shipped after product inspection and pre-shipment inspection.
[0019]
【The invention's effect】
Since the present invention is configured and operates as described above, the production line is simplified, the initial investment and maintenance costs can be reduced, the economic efficiency is improved, and the work can be performed with dirt due to dust and the like, and the raw material can be charged. In addition to eliminating the noise at the time of the operation, the working environment can be kept good and the health of the workers involved is no longer impaired, and there is no physical strength in the concrete product production line, which was conventionally regarded as dirty work or heavy work It has a remarkable effect, such as the ability of people to enter.
[Brief description of the drawings]
FIG. 1 is a layout diagram showing one embodiment of a low noise type production line for concrete products according to the present invention.
FIG. 2 is a flowchart showing a measuring step and a kneading step.
FIG. 3 is a flowchart showing a curing step and subsequent steps.
FIG. 4 is a flowchart showing a process of handling a mold.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Low noise type production line 11 of concrete products 11 Form 12 Cart 13 Conveyor 21, 22 Silo 23 Measuring part 24 Kneading part 25 Mono pump 26 as fixed quantity filling machine Filling part 27 Curing part

Claims (2)

A production line for producing a concrete product mainly composed of cement, which is a measuring section for measuring raw materials, a kneading section for stirring a plurality of measured raw materials using a defoaming mixer, and a kneaded material. Is filled into a mold using a fixed-quantity filling machine, and a vibration-free filling section for inclining the mold while degassing the air in the mold, and a curing section for placing the mold filled with the kneading material in place. And a low noise type production line for concrete products having a configuration in which the measuring section, kneading section, and filling section are arranged along a work line. 2. The low noise type production line for concrete products according to claim 1, wherein a means for moving the form is provided in the work line, and the means includes a carriage for mounting the form and a conveyor for moving the carriage. .

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