JP2009287668A - Heat insulating material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat insulating material that can be installed easily even when a protruded portion is formed. <P>SOLUTION: The heat insulating material includes a plurality of small heat insulating material pieces 4a held in contact with the outer peripheral surface of a heating body and a cylinder. Each heat insulating material piece has a surface fastener, and is joined to the adjoining heat insulating material piece by the surface fastener. By this constitution, since the protruded portion 8 protruding from a gap between the heat insulating material pieces 4a can be formed, the heat insulating material can be easily installed even when the protruded portion is formed. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat insulating material suitable for power saving of a heating element such as a cylinder heater of a furnace or a molding machine.

Generally, in an injection molding machine or an extrusion molding machine, a heater is wound around a cylinder to heat the cylinder in order to melt the resin supplied to the cylinder. In this case, the heat of the heater is dissipated from the outer surface of the heater. Since the temperature at which the cylinder is heated is usually several hundred degrees, this amount of heat radiation cannot be ignored. Therefore, conventionally, a method of winding a heat insulating material made of cloth around the outer surfaces of the heater and the cylinder has been proposed in order to prevent heat dissipation and save power.
JP 2005-240903 A

  However, since a thermocouple for measuring the temperature of the cylinder and a heater terminal for supplying power to the heater protrude from the outer surface of the cylinder, a heat insulating material is wound around the outer surface of the heater and the cylinder. Is difficult. Moreover, when a heat insulating material is wound around the outer surface of a heater and a cylinder avoiding such a protrusion, a clearance gap is formed and the heat insulating performance is affected. In addition, in order to solve such a problem, the method of forming the hole etc. which penetrate a protrusion in a heat insulating material, and winding a heat insulating material without a gap can be considered. However, when this method is used, the manufacturing cost of the heat insulating material increases, and since the heat insulating material becomes unique to the molding machine, the heat insulating material cannot be reused and its usefulness is significantly reduced.

  The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a heat insulating material that can be easily installed even when there is a protruding portion.

  The heat insulating material according to the present invention is a heat insulating material that is wound around the outer peripheral portion of the heat generating element, and includes a plurality of heat insulating material small pieces that come into contact with the outer peripheral surface of the heat generating element, each heat insulating material small piece having a surface fastener, It is characterized by being joined to adjacent heat insulating material pieces by fasteners.

  According to the heat insulating material according to the present invention, since the protruding portion can be protruded from the gap between the small pieces of the heat insulating material, it can be easily installed even when there is a protruding portion.

  Hereinafter, with reference to drawings, the structure of the heat insulating material used as embodiment of this invention is demonstrated.

  As shown in FIGS. 1 (a) and 1 (b), a heat insulating material 4 according to an embodiment of the present invention is wound around the outer surface of a heating element 1 provided on the outer periphery of a cylinder 3 of an injection molding machine or an extrusion molding machine. It is what The heat insulating material 4 efficiently transmits heat from the heating element 1 to the cylinder 3 by suppressing heat dissipation from the outer surface of the heating element 1 and the cylinder 3. As a result, the resin supplied into the cylinder 3 is discharged from the discharge port 2 in a state of being melted by the heat of the heating element 1. In this embodiment, as shown in FIG. 2, the heat insulating material 4 is composed of a plurality of heat insulating material pieces 4a having a trapezoidal cross section in the radial direction in contact with the outer peripheral surfaces of the heating element 1 and the cylinder 3.

  As shown in FIG. 3, each of the small pieces of heat insulating material 4a has a belt-like bonding sheet 7 extending in four directions in the plane bonded to the upper surface, and the upper surface and the lower surface of the bonding sheet 7 are respectively male or A female hook-and-loop fastener 5 and a female or male hook-and-loop fastener 6 are formed.

Each heat insulating material piece 4a has a female or male surface fastener 6 formed on the lower surface of its own bonding sheet 7 and a male or female surface fastener formed on the upper surface of the bonding sheet 7 of the adjacent heat insulating material piece 4a. 5 to cover the outer peripheral surface of the heating element 1. Although not shown, by setting a cover member made of a heat-resistant resin in the outer surface direction of the heat insulating material piece 4a, heat circulation from the gap between the heat insulating member pieces can be prevented to save power. May be.

  As is clear from the above description, the heat insulating material according to the embodiment of the present invention includes a plurality of heat insulating material pieces 4a that are in contact with the outer peripheral surfaces of the heating element 1 and the cylinder 3, and each heat insulating material piece has a hook-and-loop fastener. And it joins with the adjacent heat insulating material piece with a hook-and-loop fastener. According to such a structure, as shown in FIG. 4, since the protrusion part 8 can be protruded from the clearance gap between the heat insulating material pieces 4a, even if there exists a protrusion part, a heat insulating material is installed easily. be able to. Further, in the heat insulating material according to the embodiment of the present invention, since the radial cross-sectional shape of the heat insulating material piece 4a is a trapezoidal shape, when the cylinder 3 has a cylindrical shape, the gap between the heat insulating material pieces 4a becomes small. Thermal insulation performance is improved and power saving can be realized.

  As mentioned above, although embodiment which applied the invention made by the present inventors was described, this invention is not limited by description and drawing which make a part of indication of this invention by this embodiment. For example, as shown in FIG. 5, the hook-and-loop fasteners 5 and 6 may be provided on the side surface of the heat insulating material piece 4a. According to such a structure, since the clearance gap between the heat insulating material pieces 4a can be made smaller, heat insulation performance improves more and power saving can be implement | achieved. As described above, other embodiments, examples, operation techniques, and the like made by those skilled in the art based on the above-described embodiments are all included in the scope of the present invention.

It is sectional drawing which shows the structure of the heat insulating material used as embodiment of this invention. It is the elements on larger scale of the area | region A shown in FIG. 1 for demonstrating the structure of the heat insulating material piece used as embodiment of this invention. It is a perspective view which shows the structure of the heat insulating material piece used as embodiment of this invention. It is a perspective view which shows the example of a connection of the heat insulating material piece shown in FIG. It is a perspective view which shows the structure of the application example of the heat insulating material piece used as embodiment of this invention.

Explanation of symbols

1: Heating element 2: Discharge port 3: Cylinder 4: Heat insulating material 4a: Small pieces of heat insulating material 5, 6: Surface fastener 7: Sheet for joining

Claims (5)

A heat insulating material wound around the outer periphery of the heating element,
A heat insulating material comprising a plurality of heat insulating material pieces in contact with the outer peripheral surface of the heating element, each heat insulating material piece having a surface fastener, and being joined to an adjacent heat insulating material piece by the surface fastener. The heat insulating material according to claim 1,
The said surface fastener is provided in the upper surface of a heat insulating material piece, and is provided in the sheet | seat surface for joining extended in a surface direction, The heat insulating material characterized by the above-mentioned. The heat insulating material according to claim 1,
The said hook-and-loop fastener is provided in the side part of the heat insulating material piece, The heat insulating material characterized by the above-mentioned. In the heat insulating material according to any one of claims 1 to 3,
The heat insulating material, wherein a cross-sectional shape in a radial direction of the heat insulating material piece is a trapezoidal shape. In the heat insulating material according to any one of claims 1 to 4,
A heat insulating material comprising a cover member made of a heat resistant resin sheet disposed on the outer circumferential side of the plurality of heat insulating material pieces.

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