JPS6027507A - Method and device for molding concrete product - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention relates to a method and apparatus for ready-to-hold demolding of concrete products, and in the downward demolding method, during molding, iron pallets are stacked on top of the pallet for transporting the product. This invention relates to a molding method and apparatus in which the iron pallet is immediately pulled out from the bottom of the formwork after molding is completed, and the shaped product is directly demolded onto the top of the pallet for transportation.

Immediate demolding methods include an inversion demolding method, an upward demolding method, and a downward demolding method. In general, the downward demolding method positions a formwork without a bottom plate in the middle of the machine frame, and
During the vibration and pressing processes, the product receiving pallet placed on the top surface of the product demolding table is lifted up to close the opening on the bottom of the form to perform molding, and the product is demolded after forming path T. Therefore, when the demolding table is lowered, the formwork is placed on the pedestal on the side of the frame, and the demolding table is further lowered, and the products in the formwork are pushed out onto the product receiving pallet on the demolding table. It is removed from the mold.

With the introduction of the paving block manufacturing technology that has recently become popular in Europe, colorful products called interlocking blocks have begun to be used in parks and promenades, and are attracting attention as a construction that harmonizes with the new urban environment. . Furthermore, recently, it has been used on roadways because it shortens the braking distance of cars and its colorful color attracts the attention of drivers.

However, the strength of blocks used for roadways is approximately 500 kg.
Since the strength required is more than twice that of the previous one, conventional molding machines were unable to mold products with the specified strength due to insufficient filling.

Therefore, in order to meet these demands, various research and experiments were carried out, and vibration devices were installed in each part of the press section and mold table, and the product was molded from three parts: the top, middle, and bottom. Succeeded in developing a molding machine that generates vibrations from the top, bottom, left and right directions that match the shape, and uses the synergistic effect to increase the fluidity of dry, cemented concrete, making it possible to mold products of specified strength with the same amount of cement used. However, in terms of molding time and filling rate, it is now able to fully compete with foreign molding machines.

Paving blocks mainly weigh approximately 5 kg to 7 kg.
- Approximately 15 to 30 pieces are molded into a sile, so rationalizing the processing will have a significant impact on reducing production costs and equipment investment.In addition to developing molding machines, streamlining the product processing method after molding is a major issue. It had been.

In the conventional product processing method known as the rack-carriage method, the product is demolded one by one onto a receiving pallet, and the pallets are sequentially fed into curing racks of the silkworm rack method, where they are loaded by a pallet loading machine. After the racks are stacked in multiple tiers, and the racks are stacked in about 5 to 8 tiers, the racks are transported to the curing yard.

After curing is completed, the pallet is removed from the rack by moving to the location where the loading/unloading machine is located. , the empty curing rack is moved towards the loading machine.

This processing method requires a curing rack, a loading/unloading machine, and a slat conveyor for moving the racks to the loading/unloading machine.

On the other hand, in the multi-tier stacking method in which blocks are stacked one after another on a single product receiving pallet, sand is sprinkled on the top of each block to prevent the upper and lower blocks from adhering to each other, and the blocks are stacked in 6 to 8 stacks repeatedly. In the case of color blocks, especially if the products are placed directly on each other for curing, color unevenness may occur, and even minute differences in the height of each product can result in a large error in total when stacked in multiple stages, causing the horizontal level to become unbalanced. As a result, hardened products were often damaged due to uneven loads being applied to some parts of the product.

If the blocks on the base metal pallets were stacked directly on top of each other, they would rust and would not be used.

The present invention overcomes these drawbacks by reducing the weight by 4 (
We have succeeded in making lα contact step νt using a wooden pallet or the like. The present invention will be explained below with reference to illustrated embodiments.

First, the demolding vibration table 19 moves upward by differentially moving the cylinder 14, and when it reaches a height near the pallet insertion guide roller 25, the pallet insertion cylinder differentially moves to remove the wooden pallet 18 on the demolding vibration table. When the clay pallet 17 is pushed out and set on the two sides of the wooden pallet, the vibration table 19 for demolding rises again and closes the lower part of the formwork M, and lifts the formwork M as it is. The formwork M is fixed by pressing the four corners of the side of the formwork against the formwork holding pads 16.

Next, the movable hopper 4 is pushed out onto the two sides of the formwork M, and the concrete inside is fed into the formwork. During feeding A, material feeding is promoted by a formwork vibrator 8 and a vibrator 8 installed on a demolding vibration table, and when feeding is finished, the movable hopper 4 is lowered back down to the fixed hopper H. Then, the press cylinder 13 is retracted, the press plate 5 is lowered, and the concrete in the form is directly pressed by the press plate 5a. Each vibrator 8 is driven to fill the dimensional regulation sensor 11.
2, a signal current flows to stop the pressing action of the press cylinder 13, and a few seconds later, all the vibrators stop driving and the molding is completed.

In this case, an engagement pin 21 is inserted from below into the lower end of the formwork M to prevent unnecessary swinging, restraining the lateral swinging due to strong vibrations, and also ensuring that the lower end of the formwork opening and the iron pallet 17 are in complete contact with each other. Since the vibrations are propagated in a state where there is no interference and a good filling rate is achieved, only the vibrations are propagated from the bottom surface of the formwork to the concrete.

This means that the strength of Koni is 500 k, which is twice the previous Ij.
This is an important element to obtain yA-'. For this reason, pallets made of wood or other composite materials are lightweight and do not rust, so they can be stacked directly on top of each other, but the one section between the f-planes of the formwork must be strongly pressed with a demolding cylinder from below. The forming method, which uses strong vibration and pressing while maintaining the strength of the mold, has many drawbacks, such as poor strength, poor durability due to pallet damage and wear, and poor vibration transmission efficiency to the formwork opening. Ta.

In the molding method of the present invention, during molding, a strong steel pallet is set on the surface of the conveying pallet to receive all the strong vibration load during molding, and after molding is completed, the vibration table for demolding is lowered slightly. Insert the pallet 17 by differentially pulling the shilling 22.The product is wooden pallet 1.
They succeeded in removing the mold to 71.

Therefore, after molding is completed, the demolding vibrating table 19 is lowered a little and the copper-iron pallet is pulled out, and the pallet is kept waiting near the retreated position until the next molding, while the mold M and demolding vibrating table 19 are lowered. Continuing, the formwork M is placed on the formwork receiver 15-10 and stops descending, but the direct press plate 5N and demolding vibration table continue to descend together, so the direct press plate is The product is directly demolded from the form M by entering the frame and pushing the product downward onto the product receiving wooden pallet 18 1-.

For demolding 4! When the i-movement table reaches its lowest position and stops, the wooden pallet 18 placed on the product movement conveyor 30 starts moving during the F-lowering.

Next, extend the press cylinder 13 and press &6.
When the demolding vibration table 19 is pushed up to its full height, a new product-receiving wooden pallet 18 is supplied from a pallet supply device (not shown) to the second side of the demolding vibration table 19. It starts to rise, and when the insertion cylinder is differentially moved to the -L side of the product-receiving wooden pallet H8 and the steel barley pallet H7, which was waiting near the insertion position, is inserted again, the pallet is automatically set. The demolding vibration table 19 is raised as it is to close the opening on the lower surface of the mold, and supply of concrete is started and molding is performed.

When inserting the steel barley barre 17, the height of the guide roller 25 can be freely changed using the adjustment groove so that the table 19 can be inserted after the table 19 has been temporarily stopped, or it can be inserted even while the barre is being raised. Since a strong elastic flexible rubber 26 is used for the joint 24, it prevents vibration from propagating to the guide a rod 23 and the insertion cylinder 22, and the insertion position and the height during molding fft are different, so the inclination occurs. Since it is flexible even when it is bent or bent, it maintains its degree of freedom and has a mechanism that can withstand strong vibrations.

As explained below using the example shown in Figure L, since up to now the number of molding blades for instant demolding molders and molding blades has been at most six per cycle, product processing after molding has a large impact on the entire molding process even in a small factory. I didn't do it, so it wasn't a big problem.

Mass-production molding machines that continuously mold more than 35 pieces in one cycle, five times as many as before, are difficult to accommodate due to the addition of loading and unloading equipment for processing products and limited space. Therefore, if a steel pallet is used as a product, there may be uneven coloring due to rust on a part of the surface, and if uncured products are directly stacked together, unbalanced loads due to product height errors may cause crumples or damage to the product. There were a lot of unresolved issues.

This invention uses a relatively thick steel pallet that is suitable for vibration propagation from the bottom surface during forming, which promotes the filling effect of concrete, and after the forming is completed, a lightweight pallet suitable for transportation is used. Therefore, there are quality control issues such as eliminating block damage and color unevenness when stacking, and using a chain hoist or a fog list in use.
Since the pallets are stacked directly, large-scale loading unlike conventional methods is possible.
Loading/unloading equipment, curing racks, thrust conveyors, etc. are completely unnecessary. Moreover, after curing is completed, the product can be directly removed from the pallet, the pallet can be collected toward the molding machine, and the product can be moved to the stacking yard.

Therefore, it is no longer necessary to transport the curing products into the factory to load and unload them from the curing racks as in the past, and the manufacturing process can be shortened. Even in a small factory, the forklift and chain hoist used in the previous factory can be used. This enables efficient loading and unloading of products after molding, reducing capital investment.
3, the effect is extremely large in terms of quality control and economy.

[Brief explanation of drawings]

FIG. 1 is a front view of one embodiment of the present invention, and FIG. 2 is an A-
A partially longitudinal side view as viewed from arrow A, Figures 3 and 4 are partially enlarged side views and front views of the demolding rack, Figure 5 is a conventional molding device, and pan and Figure 6 is a pallet insertion device. The front view and off-line view are explanatory views of the engagement state of the steel pallet and wooden pallet inserted into the lower surface of the formwork 5a...direct press plate, 6...press rack, 7...
→ Rack for demolding, 8... Vibrator, 15... Form support 4J,
17...Steel pallet, 18...Wooden product I1
Transport pallet, 19...Vibration table for demolding, 26.
...iiJ flexible rubber plate, 27...differential part, 30...product movement conveyor, 31...1 electric motor, M...formwork,
n...Fixed hopper. 4','Y Permission applicant Chiyo 1 [1 Giken Kogyo Co., Ltd. rI
:Figure 3￥;41 stations

Claims (1)

[Scope of Claims] A formwork that has one or more columns on the left and right sides, includes a press rack and a removable mold rack that move up and down using the upper and lower parts of the left and right columns as guide columns, respectively, and is located in the middle. When concrete is fed and pressed, the demolding rack is raised and the product receiving plate closes the bottom opening of the form to form the mold, and when demolding, the demolding rack is lowered to take out the product. In the molding method, during molding, a special pufflet is stacked on top of the product receiving pallet to close the opening at the bottom of the form, and after completion of molding, the special pallet is pulled out and the product is demolded directly onto the product receiving pallet. A downward demolding method (2) characterized in that the product is demolded by directly inserting a press plate into the formwork and extruding the product. Mold forming method (3) A molding frame holder installed at the mid-height of one or more columns on the left and right, a press rack and a mold removal rack that move up and down using the upper and lower parts of the left and right columns as respective guide columns. The formwork holder is positioned by a formwork support material extending inside the machine frame, and a product support is provided on the top of the demolding rack. Equipped with a differential mechanism that inserts and pulls out the forming pallet, when concrete is being poured and rolled down, the demolding rack is raised and the forming pallet is placed on the forming pallet, and the bottom opening of the formwork is closed and vibrated. A downward demolding molding device characterized in that after the press rack is pressed down by a press plate, the demolding rack is lowered to take out the product.