JPH01299904A - Continuous manufacture of flexible and flat compact and device therefor - Google Patents

Abstract

PURPOSE:To form a platelike material in succession by supplying a mixed material of asphalt or the like onto a belt conveyor and, after molding upper and lower surfaces and both sides, cutting it upon separating from the belt conveyor. CONSTITUTION:A binder of asphalt or the like and an admixture of civil engineering and construction materials are supplied onto a belt conveyor 4 from a heating mixer furnace 1 via a hopper 3. Next, both sides are formed by two side belts 11 moving almost the same speed with this belt conveyor 4, and a platelike compact is regulated to temperature with flexibility by a temperature regulating device 18 spraying cold water or hot water to the belt conveyor 4, while the top face is formed by a damper 16. Then, this platelike compact is separated from the conveyor 4 by a scraper 19, and is cut by a cutter 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and an apparatus for continuously producing a flat plate-shaped article which has elasticity at room temperature and is suitably used as a tile or road pavement.

[Conventional technology]

A specific example of such a flat plate-like body is
As described in Japanese Patent No. 5843, there are aggregates consisting of stone powder, sand, natural or naturally crushed stone, decolorized asphalt as a binder, and a mixture to which pigments and the like are added.

When producing such molded bodies on a commercial level, methods such as compression molding, transfer molding, extrusion molding, blow molding, and lamination molding are generally attempted.

[Problem to be solved by the invention]

However, when producing the above-mentioned molded product, since the molding mixture contains a binder that becomes fluid at high temperatures, sag occurs during the molding process, making it difficult to maintain the flat shape of the product itself as well as the side surface condition. is difficult.

In order to prevent deformation due to sagging during the molding process during the production of such flat plate-shaped molded bodies, attempts have been made to observe the flow state of the molding mixture and adjust the heating conditions based on this, but in practice this has not been possible. The adjustment conditions are complicated and practical application is extremely difficult.

Furthermore, it is essential to mix sand, pebbles, etc. as a molding aggregate, and it is impossible to apply continuous mechanical molding at room temperature. Therefore, it is impossible to apply continuous mechanical molding at room temperature. The reality is that molding has to be used, resulting in poor production efficiency.

The purpose of the present invention is to solve the problems in producing a flat plate-shaped body from a mixture containing aggregate as a compounding raw material and a binder that is fluid at high temperatures, and to improve the size and scale of the molded product. Regardless, the dimensional accuracy is high, and
The objective is to continuously obtain products with excellent surface conditions.

[Means to solve the problem]

The present invention utilizes the characteristics that it has almost perfect fluidity at high temperatures, maintains its shape at relatively low temperatures, and can be cut and reshaped relatively easily to continuously form plate-shaped molded bodies. This allows for flexible manufacturing and dimensional adjustment.

That is, the present invention provides a mixed material of a binder with high temperature fluidity such as asphalt or plastic resin and a material for civil engineering and construction, which is fed in a heated state onto a belt conveyor while being vibrated, and is formed into a flat shape. Both sides and the top surface are formed while being conveyed by a belt conveyor, and the temperature is adjusted near the end of the belt conveyor to the extent that the flat plate has flexibility. The molded flat plate is then separated from the belt conveyor, cut into a predetermined length, and cooled.

〔Example〕

The present invention will be explained below based on the attached drawings.

FIG. 1 shows an overall view of a continuous molding apparatus suitable for implementing the manufacturing method of the present invention, and FIG. 2 shows a plan view of the same apparatus.

In Figures 1 and 2, 1 indicates the heating mixing pots provided in two series, and 2 indicates the heating mixing pots 1 provided in the two series so that the supply of raw materials from the heating mixing pots 1 to the hopper 3 will not be cut off. A turntable for switching the heating mixing pot 1 is shown.

Reference numeral 4 denotes a belt conveyor provided below the hopper 3, which has a steel conveyor plate on its surface, and serves not only to simply convey the mixture from the hopper 3, but also to shape the lower surface of the mixture. Also serves as. Reference numeral 5 indicates a drive roller of the belt conveyor 4, 6 a return roller, 7 a driving electric motor and reduction gear, 8 a frame, and 9 an adjustment cylinder, which has a function of adjusting the tension level of the belt conveyor 4. Reference numeral 10 indicates a screed that adjusts the thickness and forms the upper surface of the molded body at the same time. Reference numeral 11 indicates side belts disposed on both sides of the belt conveyor 4, and these side belts 11 are approximately concave with respect to the moving speed of the belt conveyor 4.
Move at speed and side pel onto belt conveyor 4) 11
A movable molding frame is formed by this, and the bottom surface and both side surfaces of the molded article are molded. 12 is side belt 1
1 is the drive table, and 13 is the side bell [1's return roller].

Furthermore, 14 is a thickness correction vibrotamper, 15 is a blower for surface cooling, 16 is a tamper, 17 is a vibromotor for driving the tamper, and 18 is a blower for spraying cold water or hot water from the bottom onto the belt conveyor 4 depending on the temperature of the molded product. The temperature control device is shown. These are provided near the end of the belt conveyor 4, and are adjustment devices for imparting appropriate plastic deformability to the molded product to maintain the shape of the molded product and to facilitate subsequent cutting.

Reference numeral 19 denotes a scraper which is provided after the temperature adjustment device and separates the flat plate-shaped 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 utilizing the appropriate plastic workability of the molded body.

Reference numeral 21 denotes a water tank provided to cool and prevent damage to the flat molded body whose front and rear surfaces are precisely cut and molded by the cutter 20.

The following describes how the flexible plate is manufactured using the continuous forming apparatus described above.
Using asphalt as a binder on ~5 mm gravel, the molding size is 7 mm x 24 Q x 120 mm.
This will be specifically explained by taking as an example the case of manufacturing a pavement board.

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

Approximately 200℃ in the heating mixing pot shown in Figures 1 and 2.
The mixed material M heated and mixed is then stored in a hopper 3, and the mixture M is passed from the opening of the hopper 3 to a screed 10 having an inclination angle of about 30° and equipped with a heating gas burner 101 and a vibration motor 102. , and is further carried out onto the conveyor 4 from between the screed 10 and the conveyor 4. At this time, the mixture M passing through the screed 1O is constantly heated to around 200° C. by the gas burner 101 installed in the screed 10.

FIG. 4 is a diagram showing the conveyance and molding state of the mixture M.

In FIG. 4, the mixture M has fluidity close to that of a liquid, and is filled into a mold formed between the belt conveyor 4 and the side belt 11, and moves at a constant speed with the belt conveyor 4. The mixture M is transferred by the side belt 11 that transfers the mixture M, and during the transfer, the bottom surface and both side surfaces of the mixture M are shaped by vibrations caused by a vibrotamper 14 attached to the conveyor 4.

Figure 5 shows a belt conveyor 4 for adjusting the molding of the mixture M.
2 is a diagram showing the structure of the P:IRIll device 18 provided below the casing 181. A hot and cold water discharge nozzle 182 for temperature control is provided in the casing 181.

The temperature of the mixture M is controlled by the temperature control device 18 to such an extent that the mixture M is soft enough to be cut and can maintain its shape as a molded body. At this time, a wavy pattern is generated on the surface due to cooling by the blower 15.
Modified by 6.

At this time, the temperature of the mixture M is adjusted at the same time as it is formed, so that it can cope with bending stress and has flexibility that will not break when separated. It is preferable to be able to do this as well.

In particular, since the belt conveyor 4 continuously conveys the mixture M, the surface temperature gradually increases, and severe temperature control is required to maintain the appropriate temperature of 50 to 60° C. just before the scraper 19.

Furthermore, after the mixture M is cooled to approximately 50 to 60° C. by the temperature control device 18 shown in FIG. 5, the mixture M is molded at the end of the belt conveyor 40 as shown in FIG. The mixture M is removed from the belt conveyor 4 by a scraper 19. The scraper 19 has a structure that allows it to be pressed onto the curved portion of the belt conveyor 4 at an angle of up to 30 degrees.

In addition, the separation of the side bell) 11 and the molding mixture M is performed in the seventh
As shown in the figure, the side belt 11 is moved by the differential crawler 111 to the drive table 12 shown in FIG.
When winding up, the sides are detached. At this time, since the gripping force of the molding mixture M is stronger than the contact force between the mixture M and the side belt 11, the mixture M will naturally separate at the drive table 12, but care must be taken to avoid damaging the sides of the molded mixture M, as shown in FIG. As shown in FIG.
can be easily and cleanly separated by applying vibration.

At this time, preheating with the gas burner 114 can further facilitate separation.

Furthermore, this separated molding mixture M is guided to a cart-equipped cutter 20 that can move at the same speed as the belt conveyor 4, and is cut into a predetermined length, for example, 120 mm, and the front and rear sides are molded.

The cut finished product falls into a water tank 21 and is finally cooled down, while a water cushion is used to prevent damage from falling. The finished product is pulled out by a belt conveyor 211 inside the water FW 21.

Furthermore, even if the binder and mixture used in the continuous molding apparatus are blended to achieve desired product properties such as molding size, color tone, degree of flexibility, etc., the molding speed (speed of the belt conveyor 4) will vary.

By adjusting the heat intensity of the molding reservoir, using auxiliary equipment, adjusting the scraper angle, etc., conditions can be obtained for the scraper 19 to reliably separate from the twist belt conveyor 4.

〔Effect of the invention〕

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

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

(2) The structure of the molding device is also greatly simplified because the infinite continuous molding frame is formed on the belt conveyor.

(3) A product of constant quality can be obtained in large quantities, and the product is flexible, and is used for paving extremely thin products mixed with sand, pebbles, etc. on sidewalks, rooftops of buildings, promenades in parks, etc. It can be applied to surfaces where a large amount of use is used, and it can also be applied to steel deck plates because it follows the vibrations and expansion and contraction of steel deck plates.The thinner it is, the lighter the weight is, so it can be used in places where weight reduction is preferred, such as bridges and ships. It becomes possible to apply it to

(4) Since the product obtained by the present invention is a block body, it can fully meet the recent demands for block formation.

(5) The products obtained by the present invention can be stocked and transported to long distances, and can also be delivered to the rooftops of existing buildings and pedestrian bridges, which were previously impossible to construct.

(6) Since the product obtained according to the present invention is flexible, it has a soft feel and is non-slip.

Furthermore, by processing this product, other properties can be added, making it a material that can meet various demands. In addition, the color can be adjusted by adding pigments, and it has extremely high waterproof properties, so it has an extremely wide range of uses.

[Brief explanation of the drawing]

FIG. 1 shows an overall view of a continuous molding apparatus suitable for carrying out the manufacturing method of the present invention, and FIG. 2 shows a plan view of the same apparatus. Figures 3 to 7 are diagrams showing the state of each process when using the apparatus shown in Figures 1 and 2, and Figure 3 shows the state of supply of the mixture from the hopper to the conveyor and the passage through the screed. Figure 4 shows the state of molding the mixture;
Figure 5 shows the structure of a temperature control device installed below the belt conveyor for adjusting the molding of the mixture, and Figures 6 and 7 are diagrams showing the state of detachment of the molded mixture from the belt conveyor. . 1: Heating mixing pot 2: Turntable 3; Hopper 4: Belt conveyor 5 Ni drive roller
6: Return roller 7: Driving motor and reducer 8: Frame 9 Near thrust cylinder 10 Ni-screte 11: Side belt 12 Ni-drive table 13: Return roller 14: Vibro tamper 15 Ni blower 1G: Tamper 17: Vibro motor for tamper drive 18: Temperature control device 19: Scraper 20: Cutter 21: Water tank 23 side plate 101: Gas burner 102: Vibration motor 111:
Deflex crawl 112: Separation auxiliary plate 113: Vibration motor 114: Gas burner 181: Casing 182: Hot and cold water discharge nozzle 211: Belt conveyor M: Mixture patent applicant 4th place: Takayo Yoshihito, Masato Kobori (and 2 others> 3rd place) figure
- Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] 1. A mixed material of a binder having high-temperature fluidity and a material for civil engineering and construction is supplied in a heated state while applying vibrations onto a belt conveyor to form it into a flat shape, and while being conveyed by the belt conveyor. After forming both sides and the top surface, and adjusting the temperature to such a degree that the flat plate has flexibility near the end of the belt conveyor, the temperature-controlled flat plate is removed from the belt conveyor using its flexibility. 1. A method for continuously manufacturing a flexible and flat molded body, which comprises separating the molded flat plate, cutting the molded flat plate into a predetermined length, and cooling the molded flat plate. 2. A kneading pot, a supply hopper provided continuously to the kneading pot, a screed having a heating device and a vibration device, and a steel belt conveyor provided below the supply hopper and capable of preheating adjustment according to the situation; A side belt that moves at approximately the same speed as the belt conveyor is installed on both sides of the belt conveyor, a temperature control device and a surface finishing device are installed near the end of the belt conveyor, and a side belt is installed at the end of the belt conveyor. Continuous production of flexible and flat molded bodies characterized by having a scraper, a fixed length cutting device provided behind the scraper, and a water cooling pool provided below the fixed length cutting device. Device.