JPH0239648Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a setting jig for a reinforcing material preform to be installed in a composite mold when manufacturing a fiber-reinforced composite material by an infiltration method.

[Conventional technology]

A method for manufacturing fiber-reinforced composite materials using inorganic or ceramic fibers, whiskers, etc. as reinforcing materials is to infiltrate a matrix material such as molten metal or liquid plastic under vacuum or pressure into an aggregate preform of reinforcing materials that has been shaped in advance. There is a method to solidify it. This method is called infiltration method,
The composite operation involves placing a reinforcing material preform inside a mold, injecting a liquid matrix, and then applying pressure from one direction or from above and below using a punch to impregnate the matrix material into the skeletal structure of the reinforcing material preform and solidify it. This is done by

However, when forming a composite, if the matrix material is injected while the reinforcing material preform is simply placed on the lower punch or bottom plate surface, the reinforcing material preform will shift in position due to liquid movement or buoyancy.
When such a phenomenon occurs, it causes various complex defects such as poor impregnation of the matrix, local solidification, shape deformation due to complex heterogeneity, and tissue destruction.

In order to solve the above problem, the applicant first proposed a composite molding device with a structure in which a carbonaceous plate or a porous ceramic plate with a groove for center-setting the preform is fixedly installed on the bottom plate of the mold. (Utility Application No. 60-90959).

[Problem that the invention attempts to solve]

However, in the case of the structure of the above-mentioned prior application, although the position of the reinforcing material preform is sufficiently fixed, it is not easy to remove the composite material from the groove in which it is inserted after the matrix material has solidified.
There is a problem that the composite part is often damaged during demolding.

[Means for solving problems]

This invention further improves the structure of the previous application,
The above-mentioned problems were solved by dividing the reinforcing material preform setting jig.
The main components of the provided composite mold setting jig are the lower punch or bottom plate 3 of the mold 1.
An outer frame member 6, which is a member for setting the reinforcing material preform 4 by being installed on top, has a through cavity 8 whose upper part is vertically cylindrical and whose lower part is constricted into an inverted truncated cone shape, and the through cavity 8. It consists of a disc-shaped core member 7 that matches the inverted truncated conical part,
When the outer frame member 6 and the core member 7 are combined, a structure is provided in which a recess 9 is formed on the upper surface for fixing the reinforcing material preform.

[Effect]

The composite material obtained by impregnating and solidifying the matrix material is firmly fixed with its lower end fitted into the recess 9 of the setting jig. The composite material can be easily separated by applying an external force such as an impact to the core member 7 from the bottom.

〔Example〕

This invention will be explained below based on illustrated embodiments.

Figure 1 is a longitudinal cross-sectional view of a composite mold showing an example of molten metal forging of a piston whose head portion is composited with fiber-reinforced metal using the infiltration method, in which 1 is the mold, 2 is an upper punch for pressurizing, 3 is the lower punch or bottom board, 4
5 is a reinforcing material preform, and 5 is a setting jig.

The setting jig 5 is a member that is installed on the lower punch or the bottom plate 3 of the mold 1 to hold and fix the reinforcing material preform 4, and as shown in the enlarged view in FIGS. It has a structure in which the child members 7 are divided and combined. Among these, the outer frame member 6 is formed to have a through-hole portion 8 whose upper part is vertically cylindrical and whose lower part is narrowed into an inverted truncated cone shape, while the core member 7 is formed by penetrating the outer frame member as described above. It is formed as a disc-shaped body that matches an inverted truncated cone-shaped portion of the cavity 8 . Therefore, when the outer frame member 6 and the core member 7 are combined, a recess 9 for holding and fixing the reinforcing material preform 4 is formed on the upper surface. In this case, if the upper edge of the vertical cylindrical portion of the through-hole 8 of the outer frame member 6 is chamfered to form an enlarged angle tapered surface 10 as shown in FIG. This facilitates insertion and helps prevent defects in the resulting composite. The outer frame member 6 and the core member 7 are preferably made of the same steel material as the mold 1 or a ceramic material such as carbon, carborundum, alumina, etc., and the shape and dimensions of the recess 9 correspond to the shape of the reinforcing material preform 4. It will be set accordingly. The depth of the recess 9 is approximately 10 to 20% of the reinforcement preform height.
It is appropriate to set it at a certain level. When forming a composite, a heat insulating sheet made of ceramic fibers may be interposed between the reinforcing material preform 4 and the recessed surface.

When forming the composite, first, the reinforcing material preform 4, which has been heated in advance to the same temperature as the matrix, is set so as to fit into the recess 9 of the setting jig 5. Next, after setting the setting jig 5 on the lower punch or the bottom plate 3, the matrix molten metal 11 is injected into the mold 1, and pressure is immediately applied through the punch to force the matrix substance into the structure of the reinforcing material preform 4. After impregnating it with water, solidify it.

The fiber-reinforced composite material composited in this manner is taken out from the mold 1. At this stage, the lower end of the composite material is firmly fitted into the recess 9 of the setting jig, but this can be easily done by applying an impact to the lower surface of the core member 7 constituting the setting jig and pushing it up. can be separated into

[Effect of idea]

By using the setting jig according to this invention, positional fluctuations of the reinforcing material preform can be prevented during the composite process, and the operation of separating the obtained composite material from the setting jig can be performed extremely easily. , these operation steps do not damage the composite material, and the work efficiency is also improved. Note that even when a wide-angle tapered surface is formed on the vertical cylindrical portion of the outer frame member, the reinforcing material preform can be set even more smoothly, and the composite quality can be improved.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional view illustrating a composite molding device using the setting jig of this invention;
The figure is a longitudinal sectional view showing the setting jig of this invention, and FIG. 3 is a plan view of FIG. 2. 1...Mold, 2...Upper punch, 3...Lower punch or bottom plate, 4...Reinforcement material preform, 5...
... Setting jig, 6 ... Outer frame member, 7 ... Core member, 8 ... Penetration cavity, 9 ... Recess, 10 ...
... widening angle taper surface, 11... matrix molten metal.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A member that is installed on the lower punch or bottom plate 3 of the mold 1 to set the reinforcing material preform 4, the upper part of which is vertically cylindrical and the lower part narrowed into an inverted truncated conical shape. It consists of an outer frame member 6 having a through-hole portion 8 and a disc-shaped core member 7 that matches an inverted truncated conical portion of the through-hole portion 8,
A setting jig for a composite mold having a structure for forming a recess 9 for fixing the reinforcing material preform 4 on the upper surface when the outer frame member 6 and the core member 7 are combined. 2. Setting treatment for a composite mold according to claim 1, in which the upper edge of the vertical cylindrical portion of the through-hole portion 8 of the outer frame member 6 is chamfered to form the wide angle tapered surface 10. Ingredients.