KR-102963608-B1 - A method and plant for manufacturing an article made of composite stone, and an apparatus for dispensing a mixture for such manufacturing.

KR102963608B1KR 102963608 B1KR102963608 B1KR 102963608B1KR-102963608-B1

Abstract

A distributor device (1) for distributing a mixture (L) to one or more forming supports (S) to manufacture an article made of composite stone. The device (1) includes a mixture supply means (10) designed to transport the mixture (L) along a longitudinal supply direction (X) toward the forming supports (S). The distributor device (1) further includes a mixture lamination means (16) located between the supply means (10) and the supports (S). The present invention also relates to a method and a plant for manufacturing an article made of composite stone using the distributor device (1) described above.

Inventors

톤셀리 루카

Dates

Publication Date: 20260513
Application Date: 20190917
Priority Date: 20180918

Claims (20)

An apparatus (1) for dispensing a mixture (L) onto one or more forming supports (S) for manufacturing an article made of composite stone, wherein the apparatus (1) and the supports (S) are movable relative to each other, and the dispensing apparatus (1) One or more forming supports (S) above; Supply means (10) for supplying the mixture (L) designed to transport the mixture (L) in the vertical supply direction (X); It includes means (16) for laminating the mixture (L), which is located between the supply means (10) and the support (S). The device is characterized in that one or more forming supports (S) are formed from a sheet of paper or a tray made of an elastomer material.
In paragraph 1, The above supply means (10) is, A device characterized by comprising a hopper (4) designed to receive a predetermined amount of mixture (L) and having at least one outlet (6) for said mixture, and an extractor belt (8) located downstream of said hopper (4) and designed to receive said mixture (L) from said outlet (6).
In paragraph 2, The lamination means (16) comprises a first lamination roll (18) and a second lamination roll (20) rotatable about each rotation axis (Y1, Y2) across the longitudinal supply direction (X), and the lamination rolls (18, 20) are spaced apart by a gap (22) having predetermined dimensions that can be adjusted to perform lamination of the mixture (L).
In paragraph 3, A device characterized in that the rotation axes (Y1, Y2) of the lamination rolls (18, 20) are located on top of each other.
In paragraph 4, The above device includes a first conveying and supporting means (24) for conveying the mixture (L) toward the lamination means (16), and the first conveying and supporting means (24) is located between the supply means (10) and the lamination means (16). The device is characterized by including a second conveying and supporting means (26) located downstream of the lamination rolls (18, 20) for conveying a laminated mixture (L) from the lamination rolls (18, 20) toward the support (S).
In paragraph 5, A device characterized in that the first conveying and supporting means (24) includes a first conveying and supporting belt (28), and the second conveying and supporting means (26) includes a second conveying and supporting belt (30).
In paragraph 6, The first conveying and supporting belt (28) has a first end portion (32) located in the area of the extractor belt (8) and a second end portion (34) located in the area of the lamination rolls (18, 20), and the second conveying and supporting belt (30) has one end portion (33) located in the gap (22) between the lamination rolls (18, 20), the device.
In paragraph 6, The device is characterized in that the first conveying and supporting belt (28) is wound around an idle transmission roller (36) located near the first lamination roll (18) and the extractor belt (8), and the first conveying and supporting belt (28) has a predetermined upward slope with respect to the feed direction (X) of the mixture.
In paragraph 6, The device is characterized in that the second conveying and supporting belt (30) has a predetermined downward slope along the supply direction (X) of the mixture.
In paragraph 3, A device comprising at least two belts (46), each of which is wound around one end of the second lamination roll (20) and each pulley (48), wherein the belt (46) is capable of holding the supplied mixture laterally as the mixture passes between the lamination rolls (18, 20).
In paragraph 6, A device characterized in that the first conveying and supporting belt and the second conveying and supporting belt (28, 30) are lined with a protective sheet (F).
In paragraph 4, A device characterized in that the rotation axes (Y1, Y2) of the lamination rolls (18, 20) are offset in the longitudinal supply direction (X) by a predetermined dimension (q1).
In paragraph 3, The device is characterized in that the rotation axes (Y1, Y2) of the lamination rolls (18, 20) are horizontal and located at the same height from the ground, and the axes (Y1, Y2) are offset in the longitudinal supply direction (X).
In Paragraph 13, The above lamination means (16) comprises a conveyor element (113) formed by a molded profile, wherein the conveyor element (113) is positioned below the lamination rolls (18, 20) and is flow-communicated with the gap (22).
In Paragraph 14, The formed profile of the above conveyor element (113) is, It includes a first part (120) located below the gap (22) and at the gap (22), and a second part (121) having one end (122) that is inclined with respect to the horizontal and located at a predetermined height from the support (S). A device characterized in that the first part (120) and the second part (121) are connected by a curved middle part (123).
In paragraph 15, The device is characterized in that the above-mentioned curved middle portion (123) is formed in the manner of an arc having a center that coincides with the axis of the lamination roll (18).
In paragraph 15, A device characterized in that the angle of inclination (α) of the second part (121) of the conveyor element (113) with respect to the horizontal plane (P) is 15° to 25° or close to 20°.
In paragraph 15, The above conveyor element (113) is, It includes a first profile (131) folded in a loop manner at the end (122) of the second part (121) for distributing an additional mixture layer (L') that is inverted with respect to the first mixture layer (L) already distributed on the support (S), and The above device is, A device characterized by including a second profile (132) folded in a loop shape positioned opposite the first profile (131) to act as a guide channel for the mixture in combination with the first profile (131).
In paragraph 3, A device characterized in that the rotation axes (Y1, Y2) of the above rolls are offset relative to each other in the vertical and longitudinal supply directions (X) by a predetermined dimension (q2).
In Paragraph 19, A device characterized by including a conveyor belt (130) designed to transport a laminated mixture (L) from the lamination means (16) toward the support (S) downstream of the lamination rolls (18, 20).

Description

A method and plant for manufacturing an article made of composite stone, and an apparatus for dispensing a mixture for such manufacturing. The present invention relates to the manufacture of an article made of composite stone material, wherein the term "article" is understood to preferably mean a slab. The present invention relates to a distributor device for distributing a mixture to one or more forming supports for manufacturing an article mainly composed of composite stone. In addition, the present invention relates to a method and a plant for manufacturing an article made of composite stone from a mixture using the distributor device described above. In particular, the mixture comprises particles, powders, or fillers composed mainly of natural or synthetic stone and cementitious, ceramic, or synthetic resin-type binders. For a long time, methods and plants have been known for the manufacture of composite stone slabs in which a mixture is deposited to form a layer on a temporary support. Subsequently, the support is transferred to a compression station, which is preferably performed by vacuum vibration compression, and then the slab is transferred to a curing station, the characteristics of which depend on the type of the previously mentioned binder, which may be cementitious, ceramic, or synthetic resin. For example, if the binder is a synthetic resin, preferably a rough slab compressed by vacuum vibration-compression is inserted into an oven, and inside the oven, the binder is cured to perform a curing step. Since a critical step in these processes and related plants is distributing the mixture onto a temporary support, various types of mixture distributors have been known for some time. The mixture dispenser device is known from documents EP2406046, EP2167295, EP1556197 and EP1802430 and WO2017118901 in the name of the same owner of this application. In such a dispensing device, the support may have dimensions slightly larger than the dimensions of the slab to be manufactured, and is formed, for example, by a tray mold made of a paper sheet, rubber, or other material. Additionally, some types of these distributors include a hopper designed to be filled with a predetermined amount of mixture and an extractor element, preferably a conveyor belt, located at the outlet of the hopper to transport the mixture downstream. The support and the distributor move relative to each other so that the mixture can be adhered along the entire length of the support. For example, a movable distributor and a fixed support surface, or alternatively, a fixed distributor and a movable support surface formed by a conveyor belt may be provided. The first type of distributor is called a moving weight distributor, and the second type is called a static weight distributor. EP1556197 discloses a distributor device having a hopper comprising a load cell for detecting the weight of a mixture to be loaded and a funnel element located at the end of an extractor belt for distributing the mixture onto and into a support by gravity. EP1802430 discloses a distributor device comprising a hopper with a molded inner wall lined with an anti-stick material. The shaping is intended to guide and deliver a mixture toward the distributor outlet. Additionally, this distributor device also features a funnel at the end of the extractor belt through which the mixture is poured by gravity, and a pair of rotary rolls located downstream of the funnel designed to crush and remove lumps of the mixture that may form between the mixture leaving the hopper and adhering to a temporary support. The presence of such lumps is undesirable during subsequent vibratory-compressive operations or within the structure of the final slab. WO2017118901 discloses a dispenser in which an extractor belt comprises a metal mesh covered with a plastic film. EP2406046 and EP2167295 disclose a distributor assembly that also includes means for dispensing a coloring agent onto the surface of a mixture before the mixture is dispensed onto a support. The aforementioned conventional distribution device is widely used and evaluated in the relevant technical field, but it has many disadvantages. First, such a distribution device does not allow for the distribution of a perfectly uniform layer of mixture on the support. This disadvantage increases the duration of subsequent steps, including the compression of the mixture distributed on the support, because the degassing and compression of the heterogeneous mixture require more time. Second, these distribution devices cannot form slabs with thinner thicknesses, especially those with a thickness of less than 10 mm. Another disadvantage of this solution lies in the fact that the mixture may delaminate and/or decompose during dispensing onto the support. This disadvantage also complicates the subsequent step of compressing the mixture on the support for the reasons mentioned above. Another disadvantage of this solution is that it cannot provi