RU1784459C - Method and device for molding piece products from ceramic mixture - Google Patents

Abstract

Use1 in the production of building materials, in particular in the molding of tiles, tiles, bricks. The inventive ceramic mass is fed into the molds after preliminary rolling with additional injection at a ratio of the peripheral speed of the forming roll to the linear speed of the conveyor equal to 2: 1-50: 1, for which the rollers and plate conveyor of the device are equipped with separate drives, and the feed roll has a discharge -distributing blades with triangular tips and forms, together with the forming ribbed roller, rollers 2 with a subsection of 3-silt.

Description

The invention relates to the production of building materials, in particular ceramic, and can be used in the technology of wall roofing and facing materials in the molding of tiles, tiles, bricks, blocks and similar piece products from various types of ceramic raw materials

The purpose of the invention is the expansion of technological capabilities.

In FIG. 1 is a diagram explaining the essence of the proposed method; FIG. 2 - General view of the proposed device; in FIG. 3 is a view A in FIG. 2.

Example. According to the invention (Fig. 1), the pre-shredded material is first fed into molds moving on the conveyor with a speed Vi under the influence of the pulling force developed by the applied torque MKpi. In the process of supplying the mass, it is preliminarily rolled, imposing preliminary pressure Рп on the material. Then, during the subsequent rolling already under the forming roll, when the rolling pressure P is applied a second time to the mass, it is additionally injected into the molds by applying the injection pressure Рн, for which the ratio of the peripheral speed of the forming roll U2 to the linear speed of the conveyor Vi is set within from 2: 1 to 50: 1 by applying a separate torque MKr2 to the forming roll, wherein MKr2 MKr1.

For example, if when molding a standard brick (250 x 120 x 65 mm), clay raw materials with a molding moisture content of 18-20% (plastic clay mass) are used and the conveyor linear speed is set within the range of 0.06 - 0.12 m / s ( 1800 - 3600 pieces of bricks / hour when molding in one stream with a width of 250 mm), then the peripheral speed of the molding roll is set within 0.3 - 0.6 m / s, i.e. maintain a V2: Vi ratio of 5: 1.

When proceeding to the molding of the same brick, but already from hard clay masses with a molding humidity of 14-16%, mention VI

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The crippled ratio, ceteris paribus, is increased to V2: Vi 20: 1. i.e. upon transition to the molding of articles of increased thickness from masses of reduced ductility, the ratio V2 / Vi (injection pressure Rn) increases and vice versa.

In general, when molding products in the range of their thickness (height) h 10-65 mm and molding moisture content of the raw materials in the range W 2 0-12%, it is practically enough to establish fixed ratios Mkrg: Mkr1 2: 1 and / s: V2 2; : 1 I vary only the ratio V2 / Vi.

The device for molding pieces of ceramic mass (Fig. 2) has a feed hopper 1, which passes into the chamber 2, where the forming roll 3 and a metering device are located, in which the device is equipped with a feed roll 4 mounted for horizontal movement for adjusting the value of the inter-roll gap A and forming 3–3 rolls paired with the forming roller 3. The forming roll 3 is ribbed, and the feed roll 4 is equipped with discharge-distributing blades 5 with triangular tips (Fig. 3).

The camera 2 passes into the guide groove 6 (its rear wall is visible in Fig. 2). The leading branch of the plate conveyor 8 with removable vertical partitions 9, forming forms that are equipped with a set of removable inserts 10, is laid along the bottom of the guide groove 6 over the roller table 7 changes in their depth. The output of the chute 6 is made in the form of a mouthpiece, the upper part. which serves as a leveling plate 11 in front of which a forming roll is mounted. The driving drum 12 of the plate conveyor 8 serves as a formwork tool, and the driven drum 13 for formwork forms. The plate conveyor 8 and rollers 3-4 are equipped with separate drives 15 and 14, providing adjustment of the ratio V2: Vi in the range from 2: 1 to 50: 1 with a fixed ratio Uz: V2 2: 1. The ratio of the installed power of the drives 15 and 14 is 2 :1.

The device operates as follows.

First, by mounting (dismounting) removable vertical partitions 9, the size of future products is set in plan, and by mounting (dismounting) removable liners 10, their size in height (thickness), i.e. depth of forms. Further using

drive 14 sets the required linear speed of the conveyor 8, i.e. device performance by weight. The outcome of a given performance and necessary

degree of compaction of the mass, the required feed rate is calculated and the necessary roll gap A is set, and with the help of the drive 15 the desired ratio V2 / Vi is set. Then, the pre-crushed raw mixture is fed into the hopper 1 and test molding of the products is carried out. If necessary, the values A and V2 / Vi are finally corrected. after which the stationary mode

forming, during which the automatic form stripping takes place on the drum 12, and their automatic formwork takes place on the drum 13.

twenty

Claims (1)

1. A method of forming piece products from a ceramic mass, including feeding it to a mold moving on a conveyor, compaction in molds by rolling under a forming roll, subsequent alignment and stripping of molded products, characterized in that, in order to expand technological capabilities, the ceramic mass is fed into the molds after preliminary rolling with additional injection at a ratio of the peripheral speed of the forming roll to the linear speed of the conveyor 2: 1 - 50: 1. 2, A device for molding pieces of ceramic mass, comprising a plate conveyor with vertical partitions forming shapes and located above the conveyor, a loading hopper with a metering device, a forming roll mounted in front of the leveling plate, and a guiding chute and a drive placed below the conveyor the fact that the device is equipped with a feed roller mounted for horizontal movement and forming rollers paired with the forming roller, while the feed roller is provided pressure-distributing blades with triangular tips, the forming roller is ribbed, the rollers and the plate conveyor are equipped with separate drives, and the molds are equipped with a set of removable inserts to change their depth. -es fs her ji x VI ":; FIG 2 Type L 0U8.3