JPS62278524A - Manufacture of spectacle temple - Google Patents

Abstract

PURPOSE:To restore a shape memory alloy wire material to its original shape even when the material deforms with an external force by abutting on the face of a custom er by fitting a jig in the shape memory alloy wire material and pressing it against the face, detaching the jig and fitting the wire material in a tip cell after heating and cooling, and restoring it to the stored shape at >=30 deg.. CONSTITUTION:While the jig 3 is fitted in the wire material 1 which forms the core of a temple, the customer puts it on and the material is matched with the face and detached in the matching state; and the material is inserted into a group of granules of 0.5-2.8mm size which are charged in a heat-resisting airtight container and have an excellent surface state and good chemical resistance after the jig is extracted. Then the material is heated and held at 200-250 deg.C for 10-30min and then quenched, and taken out of the container. The wire material 1 is drawn linearly at a place of <=30 deg.C and fitted in the tip cell, and the wire material when put in hot water of >=30 deg.C restores itself to the stored shape with the tip cell fitted. Consequently, the material contact the face correctly at the time of wear and never falls during use, and even if the material deforms with an external force, it restores itself to its original shape by being heated again up to >=30 deg.C.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a method of molding a core material of an eyeglass temple.

(Prior art) Temples for eyeglasses are manufactured in factories and then worn by customers at the final sales stage, and are bent to fit the face, but they tend to return to their old shape somewhat after processing. However, when this point is taken into account and the garment is bent at the joint, there are drawbacks such as a feeling of being cramped at the beginning of wearing.

(Problems to be Solved by the Invention) The present invention uses a shape memory alloy as a temple core material, molds it into a shape that fits the wearer, and then attaches a cell material to the end, so that the temple can be used for a long period of time. The purpose is to maintain the optimum shape.

(Another Means to Solve the Problem) In order to achieve the above object, the present invention uses a shape memory alloy wire material with a memory temperature of 3 o'c or more as a core material, and a spectacle temple that can adapt to the bending and stretching of the wire material. A jig with a cell-shaped outer shape is inserted into the wire, bent into a predetermined shape at a temperature of 30°C or less, and then the jig is removed from the wire to form a surface with a grain size of φgmm to φα5mm. Place in a heat-resistant closed container filled with particles that are in good condition and have no reactivity with T1-N1, insulate for 70 minutes, and heat at 200C for 30 minutes.
Or 2! ; After heating and holding at 0°C, rapidly cooling to memorize the shape of the bent state, the wire is heated to 30°C or lower, stretched into a straight line, and a cell is inserted into it, and heated to a temperature of 3θ°C or higher. It is characterized by being put into a container and returning it to a predetermined shape.

(Example) Fig. 1 a, b and Fig. 2 a, b are diagrams showing how the wire jig used in the present invention is used. These are sheath-shaped jigs that can be used to bend and stretch wire rods.

Figures 3, 4 and 5 are explanatory diagrams of the dimensions of the granules and wire rods used.
In FIG. 4, three grains are in contact.

In this case, the relational dimensions between the wire rod / and the grain size are shown in Fig. 5 as the wire diameter A and the grain size B, and by substituting the appropriate values into the previous equation.

Bφ Aφ The core diameter of the modern part is Lotus/, 2 mm −f/,
/Imm, the maximum grain size is φ! &m
m.

Empirically, it is appropriate for the minimum particle size to be ψQ 5 mm or more, taking into consideration frictional resistance and blocking during packing into a closed container as described later.

The memorized temperature was set at 30 degrees or higher, taking into account the body temperature of the face.

The material of the granules has a good surface condition to prevent damage when rubbing against the wire and gas absorption during heating. Fine ceramics or stainless steel, which are not reactive to Ni, are suitable.

FIG. 6 shows an example of a closed container used in the present invention, //
2 is a cylindrical container made of heat-resistant, electrically insulating material, and /2 is a lid. As shown in the figure, a wire rod / bent into the desired shape is placed in the container, and after filling the container with granules, the lids 7 and 2 are closed. The wire is heated by applying pressure and applying electricity to an electric heating coil provided outside the container, electrodes attached to the upper and lower ends of the wire (all not shown), or using a heater.

FIG. 7 shows a heating and cooling container preferred for carrying out the present invention. After setting the wire rod /, heated oil was first poured into the upper and lower oil pipes /3, /3 for heat treatment, and then cooled. It is designed to be cooled by injecting oil, and is shown in Figure /II.
is the oil tank, /3 is the oil supply pump, /6 is the temperature sensor.
/ indicates a detection unit, 7g indicates an oil heating device, /9 indicates an oil cooling device, and 2o indicates a changeover switch.

, have the customer wear it with a jig or 3 etc. fitted into the wire rod that is the core of the temple, remove it while fitting it to the face, and after removing the jig, heat and cool it sequentially,
Thereafter, the wire is stretched in a straight line at a temperature of 30 degrees Celsius or lower, the first cell is fitted, and the wire returns to the memorized shape when placed in hot water of 1.30 degrees Celsius or above, with the first cell fitted.

The temples manufactured in this manner properly contact the face when worn, are not likely to fall off during use, and do not give the wearer any uncomfortable feeling.

Furthermore, even if the tip cell (modern) part is deformed by external force during use, heating it again to 30C'' or higher will return it to its old shape.

[Brief explanation of drawings]

a, b a, p Figures 1 and 2 are diagrams showing how the wire rod jig used in the present invention is used, and Figures 3, 4, and 5 are the relationships between the grains and wire rods used. The dimensional explanatory drawings, FIGS. 6 and 7 are views showing the state in which the closed container used in the present invention is used.

Claims (1)

[Claims] A step of fitting a shape memory alloy wire with a memory temperature of 30°C or higher into a jig having a cellular shape at the tip of an eyeglass temple that can adapt to the bending and stretching of the wire, and bending it into a predetermined shape at a temperature of 30°C or lower. Then, the jig was removed from the wire rod, and the jig was inserted into a group of particles with a particle size of φ2.8 mm to φ0.5 mm, which had a good surface condition and high chemical resistance, and was filled in a heat-resistant airtight container for 10 minutes or more. After heating and holding at 200°C to 250°C for 30 minutes, the wire is rapidly cooled, and the wire is taken out from the container, stretched into a straight line at a temperature of 30°C or less, and a tip cell is inserted into it, and the wire is stretched at 30°C. A method for manufacturing eyeglass temples comprising the above step of placing them in hot water to return them to a predetermined shape.