RU2014222C1 - Extruder for manufacture of heat-insulation articles of semicylindrical shape - Google Patents

Abstract

FIELD: production of heat-insulation articles. SUBSTANCE: piston of plunger moulding extruder is provided with metal pins and rotation drive. Extruder die is made in the form of loose mould with blades for lengthwise trimming. EFFECT: enhanced reliability of operation. 2 cl, 3 dwg

Description

 The invention relates to the manufacture of heat-insulating products, mainly shells and segments.

 A device for the manufacture of extruded beams, including a press chamber with a loading funnel, a pusher with a hollow core and a drive.

 This device is accepted as an analog. Its disadvantage is that the products made with this device have a heterogeneous structure and have a high density.

 A device for the manufacture of heat-insulating products, including a press chamber with a mouthpiece and a loading hole, a hopper, a piston with a hollow mandrel and a drive.

 This device is adopted as a prototype and is the closest to the proposed technical essence and the achieved effect.

 However, products manufactured using this device do not have a sufficiently low density and homogeneous structure.

 The purpose of the invention is the production of heat-insulating products of a segmented shape with a uniform structure and low density.

 This is achieved by the fact that in the device, which includes a material feed hopper communicating with each other, a pressing channel with a piston and a central hollow mandrel and a forming matrix with slitting knives, to increase the quality by ensuring mixing of the material and the formation of voids, the piston is equipped with metal fingers fixed to its working surface, and the rotation drive, while the matrix is made in the form of a removable mold with external and internal cylindrical surfaces, in addition, the inner and outer cylindrical The surfaces of the mold are connected by means of longitudinal knives.

 In figure 1. 2 and 3 show the proposed device.

 The device comprises a pressing channel 1, mounted on the base 2, a removable mold 3 with a backup 4, an inner cylinder 5, slitting knives 6, a slide gate 7, a hopper 8 for feeding material, a piston 9 with a hollow mandrel 10 and metal fingers 11, drive 12.

 The device meets the criterion of "novelty, because there are significant distinguishing features: in order to combine the functions of the pusher and mixing the mass, as well as the formation of voids in the product, the piston is equipped with metal fingers. The piston combines both rotational and reciprocating functions; slitting knives in a removable press form serve as a means of connecting the outer and inner cylinders.

 The device also meets the criterion of "significant differences", because in the technical and patent literature not found a similar device or device with similar features.

 The device operates as follows.

 Through the feed hopper 8, the raw material mixture wakes up in the pressing channel 1, where during the rotational movement of the piston 9 it is mixed with the fingers 11 and is evenly distributed over the entire volume of the pressing channel. Then the piston stops in a predetermined position and performs a translational motion. Due to this, the molding material is pushed into the mold 3, where it is divided by longitudinal knives 6 into two parts of a semi-cylindrical shape and slightly compacted. The fingers 11, embedded in the pressed mass, forms voids in it. The horizontal movement of the piston and fingers is provided by the mandrel 10 included in the inner cylinder 5 of the mold. To feed the next portion of the molding material, the piston is retracted to its original position. The process is repeated until the desired product length is obtained. In this case, the gate 7 protects the mass from extrusion. The mold is then disconnected from the mixer and serves as a split mold for the hardening mass.

Claims (2)

 1. DEVICE FOR THE PRODUCTION OF HEAT-INSULATING PRODUCTS OF A SEMI-CYLINDRICAL FORM, including a material feed hopper communicated with each other, a pressing channel with a piston and a central hollow mandrel, and a forming matrix with slitting knives, characterized in that, in order to improve the quality of products by ensuring material mixing and formation voids, the piston is equipped with metal fingers fixed on its working surface and a rotation drive, while the matrix is made in the form of a removable mold with external and internal cylindrical surfaces.  2. The device according to claim 1, characterized in that the inner and outer cylindrical surfaces of the mold are connected by means of longitudinal knives.

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