JP2716730B2 - Method and apparatus for continuous production of flexible and flat molded body - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a method and an apparatus for continuously producing a flat plate having elasticity at ordinary temperature and suitably used as a tile or a road pavement.

[Conventional technology]

A specific example of such a flat plate is disclosed in JP-B-61-25.
As described in JP 843, stone powder,
Examples include borax, natural or natural crushed stone, decolorized asphalt as a binder, and a mixture obtained by adding a pigment or the like thereto.

When manufacturing such a molded product on a commercial level, it is generally attempted to employ a method such as a compression molding method, a transfer molding method, an extrusion molding method, a blow molding method, or a lamination molding method.

[Problems to be solved by the invention]

However, during the production of the molded article, since the molding mixture contains a binder that becomes fluid at a high temperature, sagging occurs during the molding process, and not only the side surface state, but also the flat shape of the product itself is maintained. Is difficult.

In order to prevent deformation due to sagging during the molding process during the production of such a flat molded body, adoption of means for observing the flow state of the molding mixture and adjusting the heating conditions thereby has been attempted. Adjustment conditions are complicated and practical use is extremely difficult.

Furthermore, it is indispensable to apply sand, pebbles, etc. as molding aggregate, and it is impossible to apply mechanical continuous molding at room temperature. In fact, molding has to be adopted, and therefore, the production efficiency is poor.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problem of producing a flat molded body from a mixture containing an aggregate as a blending raw material and a binder having fluidity at high temperature, and to reduce the size and scale of the molded product. Regardless, the object is to continuously obtain products having high dimensional accuracy and excellent surface condition.

[Means for solving the problem]

The present invention uses a property that it has almost perfect fluidity at high temperature and maintains its shape at relatively low temperature, but makes it possible to cut and re-form it relatively easily. In this way, it is possible to freely and flexibly produce the dimensional adjustment.

That is, the present invention is to supply a mixed material of asphalt or plastic resin and aggregate for civil engineering and building while applying vibration to the belt conveyor in a heated state, to form the flat material, and to form both sides during conveyance by the belt conveyor. After forming the upper surface and adjusting the temperature to a temperature at which the flat plate has flexibility near the end of the belt conveyor, the tuned flat plate is separated from the belt conveyor by using its flexibility,
The separated molded flat plate is cut into a predetermined length and cooled.

〔Example〕

 Hereinafter, the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an overall view of a continuous molding apparatus suitable for carrying out the manufacturing method of the present invention, and FIG. 2 is a plan view of the apparatus.

In FIGS. 1 and 2, reference numeral 1 denotes a heating / mixing kettle provided in two stations, and 2 denotes a heating / mixing pot provided in two stations so that the supply of raw materials to the hopper 3 from the heating / mixing tank 1 is not interrupted. 1 shows a turntable for switching the heating and mixing pot 1 of FIG.

Reference numeral 4 denotes a belt conveyor provided below the hopper 3, which has a conveying plate made of steel on the surface and not only conveys the mixture from the hopper 3, but also serves to form the lower surface of the mixture. Also serves as. Reference numeral 5 denotes a drive roller of the belt conveyor 4, reference numeral 6 denotes a return roller, reference numeral 7 denotes a drive motor and a reduction gear, reference numeral 8 denotes a frame, and reference numeral 9 denotes an adjust cylinder, which has a function of adjusting the degree of tension of the belt conveyor 4. Reference numeral 10 denotes a screed that adjusts the thickness and simultaneously forms the upper surface of the formed body. Numeral 11 denotes side belts arranged on both sides of the belt conveyor 4. Both side belts 11 move at substantially the same speed as the speed of movement of the belt conveyor 4, and are formed on the belt conveyor 4 by the side belt 11. Is formed, whereby the bottom surface and both side surfaces of the molded body are molded. Reference numeral 12 denotes a drive table of the side belt 11, and reference numeral 13 denotes a return roller of the side belt 11.

Furthermore, 14 is a thickness-corrected vibro tamper, 15 is a blower for cooling the surface, 16 is a tamper, 17 is a vibrator motor for driving the tamper, and 18 blows cold water or hot water onto the belt conveyor 4 from the lower surface depending on the temperature of the molded body. 1 shows a temperature control device.
This is provided near the end of the belt conveyor 4,
This is an adjusting device for imparting an appropriate plastic deformability to the molded body to maintain the shape of the molded body and to facilitate subsequent cutting.

Reference numeral 19 denotes a scraper provided after the temperature adjusting device and for separating the plate-like molded product formed and conveyed by the belt conveyor 4 from the belt conveyor 4.

Reference numeral 20 denotes a cutter that cuts the continuous molded body separated by the scraper 19 into a predetermined length by using appropriate plastic workability of the molded body.

Reference numeral 21 denotes a water tank provided for cooling and preventing breakage of the unbalanced shaped body of which the rear surface is accurately cut and formed by the cutter 20.

As described above, the mode of manufacturing a flexible plate using the above-mentioned continuous forming apparatus is described as follows.
A concrete description will be given by taking as an example a case where a pavement plate having a molding size of 7 mm × 240 mm × 120 mm is manufactured by using asphalt-based binder as a binder for gravel of 55 mm.

FIG. 3 is a diagram showing a state in which the material is supplied from the hopper 3 to the conveyor 4 and a state in which the material passes through the screed 10.

Approximately 200 ° C in the heating and mixing pot 1 shown in FIGS. 1 and 2
The mixture M heated and mixed is stored in the hopper 3 once, and the mixture M passes through an opening of the hopper 3 through a screed 10 having an inclination angle of up to about 30 ° provided with a heating gas burner 101 and a vibration motor 102. , And further conveyed onto the conveyor 4 from between the screed 10 and the conveyor 4. At this time, the mixture M passing through the screed 10
The gas is constantly heated to about 200 ° C. by the gas burner 101 installed in the apparatus 10.

 FIG. 4 is a view showing a state in which the mixture M is transported and formed.

In FIG. 4, the mixture M has fluidity close to that of a liquid, and is in a state filled in a mold formed between the belt conveyor 4 and the side belt 11, and has a uniform velocity with the belt conveyor 4. The mixture M is formed on the bottom and both sides by the vibration of the vibrating tamper 14 attached to the conveyor 4 during the transfer.

FIG. 5 is a view showing the structure of a temperature control device 18 provided below the belt conveyor 4 for adjusting the molding of the mixture M. A hot / cooled water discharge nozzle 182 for temperature adjustment is provided in a casing 181. Have been.

The temperature of the mixture M is controlled by the temperature control device 18 to such an extent that the mixture M has a softness that can be cut, while maintaining the shape as a compact. At this time, a wavy pattern is generated on the surface by cooling by the blower 15, and this is corrected by the tamper 16 shown in FIG.

The temperature of the mixture M at this time can correspond to the bending stress,
In addition, it is preferable that the screed 10 can be formed and the temperature can be adjusted at the same time as immediately before the scraper 19 so that the temperature is flexible enough not to break when separated.

In particular, since the belt conveyor 4 continuously carries the mixture M, the surface temperature gradually rises, and severe temperature control is required in order to maintain the appropriate temperature of 50 to 60 ° C. immediately before the scraper 19.

Further, after the mixture M is cooled to approximately 50 to 60 ° C. by the temperature control device 18 shown in FIG. 5, the lower surface of the molding mixture M is removed at the end of the belt conveyor 4 as shown in FIG. The mixture M is detached from the belt conveyor 4 by the scraper 19. The scraper 19 has a structure capable of being pressed against the curved portion of the belt conveyor 4 at an angle of up to 30 degrees. As shown in FIG. 7, the side belt 11 is separated from the molding mixture M by the deflector roll 111 to separate the drive table 12 shown in FIG.
Remove the side surface when winding up. At this time, since the grip force of the molding mixture M is stronger than the contact force between the mixture M and the side belt 11, the molding mixture M is naturally separated at the drive table 12, but the side surface of the molding mixture M is not damaged.
As shown in FIG. 7, a separation auxiliary plate 112 is used, and the auxiliary plate 112 can be easily and neatly separated by vibrating the auxiliary plate 112 with a vibration motor 113. At this time, by preheating with the gas burner 114, separation can be further facilitated.

Further, the separated molding mixture M is guided to a carriage-equipped cutter 20 that can move at the same speed as the belt conveyor 4, and cut into a predetermined length, for example, 120 mm, to form front and rear side surfaces.

The cut finished product falls into the water tank 21 and is finally cooled, and at the same time, the water cushion is used to prevent damage due to the fall. The finished product is a belt conveyor 21 in a water tank 21
Withdrawn at one.

Further, even if the binder and the mixture used in the continuous molding apparatus are blended so as to have the properties of the product required such as molding size, color tone, degree of flexibility, etc., the molding speed (speed of the belt conveyor 4) and the molding speed are reduced. The conditions for reliable separation from the belt conveyor 4 by the scraper 19 can be obtained by performing the heat strength and weakness, the use of the auxiliary device, and the adjustment of the scraper angle.

〔The invention's effect〕

 According to the present invention, the following effects can be obtained.

(1) Since the final product is obtained by cutting a continuous plate, productivity is greatly improved.

(2) The structure of the product for molding is greatly simplified because the infinitely continuous molding frame is formed on the belt conveyor.

(3) A large quantity of products of a constant quality can be obtained, and the product is flexible and is used for paving on sidewalks of buildings, rooftops of buildings, parks, etc., which are extremely thin products mixed with sand, pebbles, etc. It can be used on a large amount of surface, and it can be applied on the steel floor plate because it follows the vibration and expansion and contraction of the steel floor plate, and it can be attached and used if it is thin. It becomes possible to apply to

(4) Since the product obtained by the present invention is a block body, it can sufficiently respond to the recent demand for blocking.

(5) The product obtained by the present invention can be stocked and transported to a distant place, and can be carried into the roof of an existing building and a pedestrian bridge, which cannot be constructed until now.

(6) Since the product obtained by the present invention is flexible, it has a soft feeling and is non-slip. Further, by processing this product, other characteristics can be added, and the material can meet various demands. In addition, the color can be adjusted by the pigment to be added, the waterproofness is extremely high, and it has a very wide application.

[Brief description of the drawings]

FIG. 1 is an overall view of a continuous molding apparatus suitable for carrying out the manufacturing method of the present invention, and FIG. 2 is a plan view of the apparatus. FIGS. 3 to 7 are views showing the state of each step when the apparatus shown in FIGS. 1 and 2 is used, and FIG. 3 shows the state of the mixture supplied from the hopper to the conveyor and passing through the screed. FIG. 4 shows a molding state of the mixture,
Fig. 5 shows the structure of a temperature control device provided below the belt conveyor for adjusting the molding of the mixture, and Figs. 6 and 7 show the state of detachment of the molding mixture from the belt conveyor. . 1: Heating mixer, 2: Turntable 3: Hopper, 4: Belt conveyor 5: Drive roller, 6: Return roller 7: Driving motor and reducer 8: Frame, 9: Adjust cylinder 10: Screed, 11: Side Belt 12: Drive table, 13: Return roller 14: Vibro tamper, 15: Blower 16: Tamper 17: Vibro motor for tamper drive 18: Temperature controller, 19: Scraper 20: Cutter, 21: Water tank 23: Side plate 101: Gas burner, 102: Vibration motor 111: Deflector roll, 112: Separation auxiliary plate 113: Vibration motor, 114: Gas burner 181: Casing, 182: Hot / cold water discharge nozzle 211: Belt conveyor M: Mixture

Claims (2)

(57) [Claims] 1. A mixed material of asphalt or a plastic resin and an aggregate for civil engineering and construction is supplied while applying vibration to a belt conveyor in a heated state, and is formed into a flat shape. After the temperature is adjusted to a temperature at which the flat plate has flexibility near the end of the belt conveyor, the tuned flat plate is separated from the belt conveyor by using its flexibility, and A method for continuously manufacturing a flexible and flat molded body, comprising cutting a detached molded flat plate to a predetermined length and cooling. 2. A kneading pot, a supply hopper provided continuously to the kneading pot, a screed having a heating device and a vibrating device, and a steel belt provided below the supply hopper and capable of preheating adjustment according to the situation. A conveyor, side belts provided on both sides of the belt conveyor and moving at substantially the same speed as the belt conveyor, a temperature control device and a surface finishing device arranged near the end of the belt conveyor, and an end of the belt conveyor , A fixed-size cutting device provided behind the scraper, and a water-cooled pool provided below the identification-size cutting device; Continuous production equipment.