JPH062190Y2 - Bending die pole coil molding die - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] This invention is a magnet for deflecting charged particles used in an SOR (synchrotron orbital radiation) ring, an ion implanter, and the like, and in particular, can be bent in the deflection direction of load particles. The present invention relates to a die used for forming a saddle-shaped or racetrack-shaped dipole magnet coil.

[Conventional technology and its problems]

Generally, a saddle-shaped coil is formed by winding an insulating tape coated with a thermosetting resin on a coil wire in advance, and after the winding is completed, the entire surface of the insulating tape is heated and press-formed by using a die. The resin layer is bonded and integrated to maintain the saddle shape.

When the coil is linearly extended in the length direction, the heating of the resin during the press molding is performed on the lower mold 1 of FIG. 3, the middle mold 2 as the coil inner frame, and the mold 3 described above. On the other hand, several through holes 5 are provided along the cavity 4 formed between the three members, and a heating means (hereinafter referred to as a heater) 6 such as a heater is inserted into the through holes 5, and the heater directly raises the temperature of the mold. It can be efficiently carried out by a method of heating to a high temperature.

However, Japanese Patent Application No. 60-2492 developed by the present inventors.
In the case of a dipole coil as proposed in No. 85, that is, a dipole coil in which a curvature is given in the deflection direction of charged particles and at least a part of which is curved in the longitudinal direction, not only the cavity but also the die are wasted of material. Since the same curvature as that of the coil is imparted for the purpose of saving, it is not possible to provide a through hole for inserting a heater along the cavity in the mold in terms of machining technology. Therefore, as another method, a method of heating the press table itself with steam or a heater and transmitting the heat to the mold to perform press molding was adopted, but this method is better than the method of directly heating the mold with a heater. Since it is indirect heating, the heating efficiency was very poor.

In view of this, the present invention has an object of enabling a mold for a coil bent in the longitudinal direction to be directly heated by a heater.

[Means for solving problems]

In order to eliminate the above-mentioned problems, the present invention, in order to eliminate the above-mentioned problems, for a molding die that is entirely curved in the same direction as the dipole coil, including the cavity, at an appropriate location on the outer surface of the die except for the coil molding surface. A groove is provided substantially parallel to the cavity, and the heater is embedded in this groove.

Even if the groove provided on the outer surface has a curvature unlike the through hole, it can be easily processed by a rotary planar machine or NC processing machine. Therefore, even a curved die can be directly heated by incorporating a heater. It is possible to solve the problem of poor heating efficiency by the direct heating.

〔Example〕

FIGS. 1 and 2 show an example of a die used for forming a saddle-shaped 90 ° bent dipole coil. This molding die includes a lower die 1 as a female die having a recess 1a for housing a coil,
The inner die includes an inner die 2 serving as an inner frame of a coil, and an upper die 3 opposed to a lower die. Each die 1, 2 and 3 has a predetermined curvature in the longitudinal direction at a bending angle θ = It is bent at 90 °. A cavity 4 for molding the dipole coil A is created between the three molds, and this cavity is also curved like each mold.

In the case of this exemplary mold, the groove 7 characterizing this invention
However, for the lower die 1, four pieces are provided on the lower surface and one on each side surface, and for the middle die 2, one piece is provided on the upper surface of the central portion and for the upper die 3, Are provided on the upper surface close to the coil forming surface. The heater 6 is housed in each groove. In order to reduce uneven heating, the groove 7 for accommodating the heater is arranged so that the center of the arc is substantially concentric with the center of the arc of the cavity 4 and runs substantially parallel to the cavity 4. This groove 7 is, as shown in the figure, a male mold 2 which is a male mold.
If the upper die 3 is also provided, press molding can be efficiently performed.

The lower limit of the number of processed grooves 7 is 1, and the upper limit may be arbitrarily determined within a range that does not cause insufficient strength of the mold.

Further, it is desirable to seal the opening side of the groove 7 with a heat insulating material 8.
This is because the heat of the heater can be efficiently transmitted to the cavity side by reducing heat radiation to the outside.

〔effect〕

As described above, according to the present invention, at least a die serving as a female die is provided with a groove at an appropriate location on the outer surface excluding the coil forming surface, and a heater is embedded in the groove, thereby making Since it is possible to directly heat the mold, there is no difficulty in embedding the heater in the curved mold,
Further, unlike the indirect heating method, the effect that the coil to be formed can be efficiently heated can be obtained.

[Brief description of drawings]

1 is a cross-sectional view showing an example of a molding die according to the present invention, FIG. 2 is a perspective view showing the mold in an exploded manner, and FIG. 3 is a cross-sectional view showing an example of a conventional molding die. It is a figure. 1 ... Lower mold, 1a ... Coil storage recess, 2 ... Middle mold, 3 ... Upper mold, 4 ... Cavity, 6 ... Heater,
7 ... Groove, 8 ... Insulation material.

Claims (2)

[Scope of utility model registration request] 1. A pair of upper and lower molds or a pair of upper and lower molds and a middle mold as a coil inner frame disposed between the upper and lower molds, including a cavity formed between the pair of molds. In a mold for a curved dipole coil that bends in the same direction as a dipole coil that has a curvature in the longitudinal direction, at least with respect to the female mold, form a cavity at an appropriate location on the outer surface except the coil molding surface. A molding die characterized in that a groove extending substantially in parallel is provided, and a heating means is embedded in the groove. 2. A molding die according to claim 1, characterized in that a plurality of the above-mentioned grooves are provided around the cavity, and heating means are embedded in each groove. .