JPS6359805B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a method of manufacturing a heat retaining cylinder.

Made of synthetic resin foam, it is used as a heat-retaining cylinder used to cover heating medium, refrigerant supply pipes, water pipes, etc. for insulation, heat retention, anti-freezing, etc.
Those made of glass wool are known. Conventionally, these insulation cylinders are made of synthetic resin foam using an extrusion foaming method in which a synthetic resin containing a foaming agent is extruded through a die of a predetermined diameter of an extruder, or pre-expanded synthetic resin particles are extruded into a predetermined diameter. It is manufactured by a bead molding method, etc., in which it is filled into a shaped mold and heated and molded.For those made of glass wool, a resin binder containing glass wool is applied to the surface of the core material of a specified pipe shape and heated. It is manufactured by drying it to form a heat-retaining cylinder, then cutting the edge of the heat-retaining cylinder and removing the core material. However, all of these conventional methods involve complicated work when manufacturing heat insulating cylinders with various inner diameters, and bead molding and core material coating methods require molds and core materials that are compatible with various inner diameters. This method has disadvantages in that the cost of molds, core materials, etc. that must be prepared is high, and mass production is difficult.

The present invention was made in view of the above-mentioned drawbacks of the prior art, and it is an object of the present invention to provide a method for manufacturing heat-retaining cylinders that can mass-produce heat-retaining cylinders with various inner diameters and external shapes by inexpensive and simple means. do.

That is, the present invention moves a plate-shaped body made of a material having heat insulating properties in a fixed direction and creates grooves for fitting the heated tubes using rotary blades arranged at appropriate intervals on one or both sides of the plate-shaped body. A plurality of strips are cut to form a plate-like body in which a plurality of heat-retaining cylinder members are arranged in series, and then an intermediate portion between each of the heat-retaining tube fitting grooves of the plate-like body is cut in the direction of the grooves. Abstract: A method for manufacturing a heat-retaining cylinder, which is characterized in that a plurality of heat-retaining cylinder members are formed, and then two of the heat-retaining cylinder members are combined to form a heat-retaining cylinder so that the grooves for fitting the heat-retaining tubes face each other. shall be.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, 1 is a plate-shaped body, 2 and 2 are feed rolls, 3 is a rotary blade for cutting a groove 4 to be fitted into a heat-retaining tube, which will be described later, and 5 is a rotary blade for cutting the external shape. Examples of the plate-shaped body 1 include extruded foams made by extruding and foaming synthetic resins such as polyolefin resins and polystyrene resins, bead moldings made by molding pre-expanded particles of these synthetic resins in a mold, etc. A known synthetic resin foam, glass wool impregnated with a resin binder, or the like is used.

The rotary blades 3 and 5 are plate-shaped members 1 as shown in FIG.
A plurality of blades are arranged at appropriate intervals in a direction perpendicular to the feeding direction (direction of arrow A in FIG. Ru. The rotary blade 3 provided on the lower surface side of the plate-shaped body 1 has a plurality of blade parts 7 on the surface of the rotary base 6, as shown in FIG. 3, for example, and has a semicircular cross section due to the rotary blade 3. A plurality of heat insulation tube fitting grooves 4 are cut, and the outer shape cutting rotary blade 5 provided as necessary on the upper surface side of the plate-like body 1 is used to cut the fourth groove into an appropriate outer shape. A plate-like body 1' having the shape shown in the figure is formed. The plate-shaped body 1' having the plurality of heat-retaining tube fitting grooves 4 formed thereon is cut in the direction of the grooves 4 by an appropriate cutting means (not shown) at the intermediate portion 8 between the heat-retaining tube fitting grooves 4. and a plurality of heat insulation cylinder members 9
(FIG. 5), and the heat-retaining cylinder 10 is formed by combining the two heat-retaining cylinder members 9 so that the heat-retaining tube fitting grooves 4 thereof face each other.

In the above embodiment, in order to form a cylindrical heat-retaining cylinder 10 as shown in FIG. ' However, as shown in FIG. 6A, only a plurality of grooves 4 for fitting the heated tubes are formed on one side of the plate-shaped body 1 without cutting with the rotary blade 5 for cutting the external shape. Alternatively, a heat retaining cylinder having a rectangular outer shape may be formed by cutting the middle part 8 of the heat retaining cylinder member 4 and combining the two heat retaining cylinder members 9. In addition, by changing the shape of the rotary blade 5 for cutting the external shape on the upper surface side of the plate-like body 1, a plurality of grooves 4 for fitting the heated tubes are cut on one side of the plate-like body 1 as shown in FIG. 6B. After cutting a V-shaped groove 11 on the other side, it is cut at the intermediate part 8 between the heat insulation tube fitting grooves 4, and the two heat insulation cylinder members 9 are combined to form a heat insulation cylinder with an octagonal outer shape. may be formed. Furthermore, in the present invention, the grooves 4 for fitting the heat-retaining tubes are not limited to being formed only on one side of the plate-like body 1, but may be formed alternately on both sides as shown in FIG. 6C. The intermediate portion 8 of the tube fitting groove 4 may be cut and the two heat retaining cylinder members 9 may be combined to form a heat retaining cylinder having a hexagonal outer shape.

In the above embodiment, a rotary blade having a shape as shown in FIG. 3 and rotating on a horizontal plane was used as the rotary blade for cutting grooves for fitting the heated tubes. The shape and structure are not limited as long as it is a rotary blade that can cut the fitting groove of the heat-insulated tube. It is also possible to cut the heat insulation tube fitting groove by rotating the .

As explained above, since the present invention forms a plurality of tube-fitting grooves on a plate-like body by cutting with a rotary blade, it can also be used when manufacturing thermal insulation tubes for tubes with different diameters. This is because it is only necessary to perform a simple operation of changing the size of the rotary blade for cutting the grooves for fitting the heated tubes, and moreover, it is possible to simultaneously form multiple grooves for fitting the heated tubes on the plate-shaped body. , a plurality of heat insulation cylinders can be manufactured at the same time, and the length dimension can also be freely set. Therefore, according to the present invention, it is possible to easily and inexpensively mass-produce heat-retaining cylinders having various inner diameters.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a schematic side view showing a method of cutting a plate-shaped body, FIG. A perspective view showing an example of a rotary blade for cutting fitting grooves, FIG. 4 is a perspective view showing an example of a shape obtained by cutting a plate-like body, and FIG. 5 is a heat-retaining cylinder formed from the plate-like body of FIG. 4. Perspective view of a heat insulating cylinder formed by combining two parts, No. 6
Figures A to C are longitudinal cross-sectional views showing different cutting modes of the plate-like body. 1, 1'... Plate-shaped body, 3... Rotary blade for cutting the groove for fitting the heated tube, 4... The groove fitting for the heated tube, 8...
. . . Intermediate portion between fitting grooves for heat insulation tubes, 9 . . . Heat insulation cylinder member, 10 . . . Heat insulation cylinder.

Claims (1)

[Claims] 1. While transporting a plate-shaped body made of a material with heat insulation properties in a certain direction, on one or both sides of the plate-shaped body,
A plurality of heat insulation tube fitting grooves are cut using rotary blades arranged at appropriate intervals to form a plate-like body in which a plurality of heat-insulating cylinder members are arranged in series, and then each of the plate-like bodies is A plurality of heat-retaining cylinder members are formed by cutting the intermediate portion between the heat-retaining tube fitting grooves in the groove direction, and then two of the heat-retaining cylinder members are cut so that the heat-retaining tube fitting grooves face each other. A method for manufacturing a heat-retaining cylinder, characterized by combining the following to form a heat-retaining cylinder.