SU823156A1 - Device for making rods in shells - Google Patents

Description

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The invention relates to the production of round, multifaceted, and similar rods from cast materials by curing them in a shell continuously manufactured on a mandrel.

The closest to the present invention is a device for manufacturing cores in a shell, comprising a rotatable hollow mandrel for forming a shell, roll holders for a sheath tape, glue applicators, a rotary mold, pipelines placed in the mandrel, material supply to fl.

However, the material in the shell does not directly contact with the form; therefore, the shear stresses in it are small. Due to the fact that the core is molded by pressing the shell over the entire surface of the mold, considerable efforts are required to advance it.

The purpose of the invention is to reduce the effort to move the rod during the molding process. .

This is achieved by the fact that in the device. containing a rotatable hollow mandrel for forming a shell, roll holders for an adhesive tape, an adhesive application device, a rotary shape and material supply pipelines placed in the mandrel, the shape is made with an inner diameter exceeding the outer diameter of the mandrel with a shell and is set eccentrically to the mandrel offset axis of the form up from the axis of the mandrel to half the difference of the diameters of the form and the mandrel with the shell.

Fig, 1 is a diagram of the device, a longitudinal section; in fig. 2 shows the cross sections of the mandrel and the form (A-A),

Claims (1)

0 and sections of the filled shell in the form of zones in which the polymer is in Laid (BB), Viscous (BB) and Solid (HG) states. The device contains a mandrel 1 mounted on the frame stand 2 and rotated from the drive shaft 3 through a gear system 4, a gear pump from them rotates, pipelines 8 for material supply placed in the mandrel, connected to a sealed fixed disk 9. The sheath 10 on the mandrel is sealed elastic cuff 11 and enters the form 12, rotated from the common drive shaft through the gear 13 and forming a curing unit with the thermal chamber 14. The bore out of the mold. The produced rod is supported by a roller gripper 15 fixed on the mold. shell (Fig. 2 .A-A). The device works as follows. Before starting, heat the mandrel 1 and the mold 12 to the operating temperature. Then a seed core of the same hexagonal section is taken as the mandrel 1, the paper skirt is glued to its end and the rod is inserted into the mold 12 so that the skirt fits tightly onto the mandrel 1. Then the paper ribbon 7 is wound with reels 6 and manually winding it onto the mandrel 1, gluing along the edges and at the junction with the skirt of the seed rod so as to form an airtight casing 10. Inside its material pipe 8, the initial components are supplied. When under pressure the shell begins to shift towards the form, turn on the drive shaft 3, from which the mandrel 1 rotates through gears 4 and 13, the form 12 and the shear pump 5, feed glue to the paper 7, the continuous bonding of the shell occurs. , filling it with a liquid melt and about moving along form 12 with its gradual hardening. In the process of shelling the shell along the lower part of the form and its rotation together with it, the rod is gradually formed. In zone B-B (Fig. 2), the shell is still filled with liquid melt under the action of its weight, it is pressed 64 against the forming surface from the bottom and sides due to the distortion of the hexagon shape. When the form is rotated with the shell, the last is rooted over the forming surface. As the melt residence time in the mold increases and the shell moves along it, the melt viscosity increases. The material goes into a plastic state and, when rolling, begins to maintain the shape profile with a decrease in the contact area with it (B-B, Fig. 2). With a sufficient rotational speed, a rod similar to the shape of a profile but of a smaller diameter is obtained (YYD, Fig. 2). In order to eliminate the spinning of the finished rod relative to the shell in the liquid melt zone and to prevent its collapse and rupture, the outgoing rod is supported by a roller a gripper 15 mounted on a rotating form 12. To seal the shell 10 on the mandrel I, an elastic cuff 11 is installed. The fixed disk 9 connected to the material pipes 8 is also sealed in the gap between the mandrel 1, therefore leaks no melt occurs. The implementation of the form with a diameter exceeding the diameter of the dressing with the shell, and the eccentric arrangement of the form and the Shell, ensuring the fit of the filled shell to the form only a part of the surface, reduces the force for displacing the rod in the form several times. Claims An apparatus for manufacturing cores in a sheath, comprising a hollow mandrel for forming a rim, roll holders for a sheath tape, a glue application device, a swivel shape and material supply lines arranged in a mandrel. in a form that differs from the fact that, in order to reduce the effort to move the rod in the formation process, the shape is made with an inner diameter that exceeds the outer diameter of the shell with a shell, and is set eccentrically to the mandrel, with the offset of the axis of the form upwards from;. by half the size of the diameters of the form and the mandrel with the shell. Sources of information taken into account in the examination of 823156 1. USSR Author's Certificate for Application No. 2478573 / 23-05, cl. On 29 D 23/04, In 29 O 23/12, 25.04.77 (prototype). SCH / city /