JP2001048553A - Mold - Google Patents

Abstract

(57) [Problem] The present invention relates to a molding die for heating and pressing a glass material, and an object thereof is to provide a molding die that can be easily formed. SOLUTION: In a molding die 6 having a body die 7, a stationary die 8, and a sliding die 9, a stationary die 8 having a non-flat molding surface.
Is a combination of at least the first and second stationary molds 8e and 8f.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding die for heating and pressing a glass material.

[0002]

2. Description of the Related Art Generally, a molding die for heating and pressure molding a glass material such as glass or resin comprises a molding object 1 as shown in FIG.
And a stationary mold 3 for molding the lower surface, and a sliding mold 4 for molding the upper surface.

In order to form a molded body having a step surface on the molding surface, a step must be provided on the surface of the stationary mold 3 or the sliding die 4 corresponding to the step surface.

Therefore, when providing a step on the surface of the stationary mold 3 or the sliding mold 4, the molding surface is processed using a grinding wheel or a dicing saw.

[0005]

However, since the stationary mold 3 and the sliding mold 4 are usually made of a cemented carbide such as tungsten carbide, it is very difficult to process them.

Accordingly, an object of the present invention is to solve such a problem and to provide a molding die which can be easily produced.

[0007]

In order to achieve this object, the present invention comprises a stationary type in which at least first and second stationary types are combined.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a trunk mold having a through hole, a stationary mold disposed at one end of the through hole, and another end with respect to the trunk mold. And a sliding die provided so as to be slidable, wherein the stationary die is a combination of at least a first and a second stationary die, wherein the molding die has a non-flat surface. By forming the stationary mold having the surface at least in combination with the first and second stationary molds, a molding die for molding a molded article having a non-flat surface can be easily formed.

According to a second aspect of the present invention, in fixing the stationary mold to the body mold, a tray having an insertion hole corresponding to the outer peripheral shape of the body mold is prepared, and the body mold and the insertion are inserted into the insertion hole. 2. The mold is inserted and fixed.
Wherein the body and the stationary mold are fixed on one tray to prevent the first and second stationary molds from being displaced when the molding mold is moved. This can improve productivity.

[0010] According to a third aspect of the present invention, the body mold is a first type.
The molding die according to claim 2, characterized in that the molding die is formed by combining a second split cylinder die, and the molded product can be easily taken out from the molding die by separating the cylinder die after molding. You can.

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

FIG. 1 shows an optical fiber alignment array 5 for aligning optical fibers to connect a plurality of optical fibers to an optical waveguide.

The optical fiber alignment array 5 is made of glass, has a step 5a on its main surface, and a lower step surface 5b on which an optical fiber jacket (a UV resin coating for protecting the glass fiber) is placed; Upper surface 5 in which V-shaped grooves 5d for supporting the core portions (glass fibers) are arranged side by side
c.

The non-flat optical fiber alignment array 5 having the steps 5a and the V-shaped grooves 5d on the main surface is molded using a molding die 6 as shown in FIG. is there.

The molding die 6 is composed of a rectangular cylinder-shaped die 7 having a through hole 7c, and a stationary die 8 arranged at the lower end of the die 7.
And a sliding die 9 inserted from the upper end side of the trunk die 7 and slidably provided with respect to the trunk die 7, and the optical fiber shown in FIG. The lower surface of the array for alignment is formed, and the main surface having the step 5a of the array for optical fiber alignment 5 shown in FIG.

That is, as shown in FIG. 3, the molding surface of the stationary mold 8 is a state in which the main surface side of the optical fiber alignment array 5 is transferred as it is, that is, the surface becomes flat with the step 8a as a boundary. It has an upper step surface 8b and a lower step surface 8d having a V-shaped projection 8c on the surface.

As shown in FIG. 4, the stationary die 8 has a structure using a combination of a first stationary die 8e for forming a lower step surface 8d and a second stationary die 8f for forming an upper step surface 8b. Has become.

As described above, the stationary die 8 having different molding surfaces at the step 8a, the first stationary die 8e for molding the lower surface 8d side, and the second stationary die 8 for molding the upper step surface 8b side. 8f
As described above, each of them is individually prepared, and these are combined to be used as one stationary mold 8. Therefore, the second stationary mold 8f having a flat molding surface can be formed by simply molding a prismatic mold. As for the first stationary mold 8e having the V-shaped projection 8c on the molding surface, a prismatic mold can be prepared and the main surface thereof can be easily subjected to groove processing using a polishing grindstone such as a grinder. By combining the first and second stationary dies 8e and 8f, the stationary die 8 having a complicated shape having a step 8a on the molding surface can be easily formed.

In the molding die 6 shown in FIG.
A heat-resistant tray 10 made of metal having an insertion hole 10a conforming to the outer peripheral shape of the body die 7 is prepared, and the body die 7 and the first and second stationary dies 8e, 8e, are provided in the insertion hole 10a as shown in FIG. 8
The stationary die 8 combined with the f is fitted and fixed.

As described above, the barrel mold 7 is placed on one tray 10.
And by fixing the first and second stationary molds 8e and 8f,
It is possible to prevent the setting conditions of the body die 7 and the first and second stationary dies 8e and 8f from being changed when the molding die 6 is moved, and to save the trouble of reviewing the setting conditions.

Further, regarding the body mold 7, the insertion hole 10
a, and as shown in FIG.
Is constituted by a pair of L-shaped first and second split body dies 7a and 7b, the lower ends of which are fitted into the insertion holes 10a, and the upper ends are formed by the respective corners as indicated by arrows. By pressing in the diagonal direction, it can be handled in the same manner as the integrated body mold 7.

Since the body mold 7 is formed of the first and second divided body molds 7a and 7b in this way, the molding surface of the sliding mold 9 is changed from the surface of the molded body after the glass glass material is molded. It is possible to take out the molded body from the molding die 6 by raising it to the position where it is separated and separating the first and second split body dies 7a and 7b at that time, so that the sliding width of the sliding die 9 is reduced. Can be smaller. That is, the height of the molding die 6 can be reduced in the height direction.

A protective film (not shown) is provided on the molding surfaces of the stationary mold 8 and the sliding mold 9 and on the inner peripheral surface of the body mold 7 in order to prevent glass material from adhering during molding. In addition, even when the shape change due to the thermal shrinkage of the glass material in the cooling stage after the molding is small, the releasability of the molded body from the molding die 6 is ensured, and the split barrel molds 7a and 7b can be easily formed. Thus, the molded product can be removed from the molding die 6 without imposing an unnecessary load on the molded product.

[0024]

As described above, according to the present invention, since the stationary mold is constituted by combining at least the first and second stationary molds, a complicated molding having a non-flat molding surface including a step is provided. It is possible to easily create a molding die for molding the shape.

[Brief description of the drawings]

FIG. 1 is a perspective view of an array for aligning optical fibers.

FIG. 2 is an exploded perspective view showing a molding die according to one embodiment of the present invention.

FIG. 3 is a perspective view of a stationary mold used in the molding die.

FIG. 4 is a perspective view of first and second stationary molds forming the stationary mold.

FIG. 5 is a sectional view of the molding die.

FIG. 6 is an exploded perspective view of a molding die according to another embodiment.

FIG. 7 is a cross-sectional view of a conventional molding die.

[Explanation of symbols]

 Reference Signs List 6 Molding die 7 Trunk die 7a First split drum die 7b Second split drum die 7c Through hole 8 Static die 8e First static die 8f Second static die 9 Sliding die 10 Tray 10a Insertion hole

Claims (3)

[Claims] 1. A torso having a through hole, a stationary type disposed at one end of the through hole, and a sliding type slidably provided from the other end with respect to the torso. A molding die, wherein the stationary mold is configured by combining at least a first and a second stationary mold. 2. In fixing a stationary mold to a body mold, a tray having an insertion hole corresponding to the outer peripheral shape of the body mold is prepared, and the body mold and the insertion mold are inserted and fixed in the insertion hole. The molding die according to claim 1, wherein: 3. The molding die according to claim 2, wherein the body die is formed by combining first and second split body dies.