KR102392865B1 - Centrifugal casting mold for manufacturing hybrid brake disc - Google Patents

Abstract

The present invention is transferred along each process of the centrifugal casting process and is coupled to the upper part of the mold base that rotates axially in parallel with the ground, sharing the central axis with the mold base, and the central area of the upper surface has a higher height than the outer area of the upper surface a lower type provided in a multi-stage structure, and having a locking jaw formed along the periphery of the upper outer surface of the multi-stage structure; an upper mold having a casting space open downward while having a corresponding inner circumferential surface of the lower surface, and having an injection hole through which the molten metal is injected in communication with the casting space in the central region of the upper surface; and at least four fixing members disposed and coupled to the outer region of the lower surface of the upper die at a predetermined angle unit based on the central axis of the upper die, and providing an elastic pressing force in the central direction of the upper die; Provide a mold for centrifugal casting comprising a do. According to the present invention, it is possible to minimize the occurrence of defects in the result of centrifugal casting.

Description

Centrifugal casting mold for manufacturing hybrid brake disc

The present invention relates to a mold for centrifugal casting for manufacturing a hybrid brake disc.

In the centrifugal casting device, since the mold rotates at a predetermined speed while the hot molten metal is in direct contact with the inside of the mold, when continuous centrifugal casting is performed, the mold is slightly deformed by thermal expansion due to heat and centrifugal force due to rotation. can be In particular, in the centrifugal casting device as in the prior art, since centrifugal casting is continuously and repeatedly performed to increase productivity, the frequency of occurrence of mold bias due to mold deformation and rotation is also high, so that the mold inside the mold changes, pins, etc. Due to the deformation of the fixed position between the upper and lower molds coupled by the fixing means of Due to this, defects may occur in the casting result (casting), and since the entire mold has to be replaced when defective castings occur, there is a problem in that the replacement of the mold is expensive.

As a related technology, Patent Registration No. 1017436270000 discloses a technology for fixing a mold by means of a clamping means, but does not contribute to the stability of the position of the mold during centrifugal casting.

An object of the present invention is to provide a mold for centrifugal casting that minimizes the occurrence of defects in the casting due to distortion of the upper and lower molds due to thermal expansion generated during the repeated centrifugal casting process.

In addition, the present invention is to provide a mold for centrifugal casting that prevents vibration and shaft deviation of the mold during centrifugal casting.

In addition, the present invention is to provide a mold for centrifugal casting that can reduce the cost of manufacturing and replacement of the mold.

In the present invention, the upper part of the mold base that rotates in parallel with the ground with respect to the central axis during the centrifugal casting process is coupled to share the central axis with the mold base, and the central area of the upper surface has a higher height than the outer area of the upper surface. lower type with multi-level structure; and
An upper mold facing the lower mold, having a casting space open downward in a central region of a lower surface, and an upper mold in which an injection hole is formed in communication with the casting space to inject molten metal in the central region of the upper surface;
The lower mold includes a lower plate in the shape of a disk that shares the central axis of rotation of the mold base and the central axis of the lower mold in the upper direction of the mold base and is coupled thereto; and
An upper plate provided in the shape of a disk having a smaller radius than the lower plate, being seated and fixed in the central region of the upper surface of the lower plate, and having a locking protrusion formed along the periphery of the outer surface;
A centrifugal column for manufacturing a hybrid brake disc, characterized in that the upper and lower molds each include an alignment member coupled from the outer side toward the center, wherein the alignment member enables confirmation of whether the upper and lower molds are aligned. Provides a quiet mold.
The upper surface of the upper plate of the lower mold increases in height from the outer region toward the center, but has a truncated cone-shaped diffusion region having a diameter smaller than the width of the lower open region of the casting space of the upper mold. Provides a mold for centrifugal casting for

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According to the present invention, there is provided a mold for centrifugal casting that minimizes the occurrence of defects in the casting due to the distortion of the upper and lower molds due to thermal expansion generated during the repeated centrifugal casting process.

In addition, the present invention provides a mold for centrifugal casting that prevents vibration and shaft deviation of the mold during centrifugal casting.

In addition, the present invention provides a mold for centrifugal casting that can reduce the cost of manufacturing and replacing the mold.

1 is a view of combining a centrifugal casting mold for manufacturing a hybrid brake disc.
2 is a shape diagram of a centrifugal casting upper mold for manufacturing a hybrid brake disc.
3 is a shape diagram of a centrifugal casting lower mold for manufacturing a hybrid brake disc.
4 is a view of the shape of a centrifugal casting inlet for manufacturing a hybrid brake disc.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing a centrifugal casting mold coupling for manufacturing a hybrid brake disc, FIG. 2 is a shape diagram of a centrifugal casting upper mold for manufacturing a hybrid brake disc, and FIG. 3 is a view showing a shape of a centrifugal casting lower mold for manufacturing a hybrid brake disc.

1 shows a state in which the upper mold and the lower mold are coupled and the injection hole is coupled to the upper mold in cross-sectional and perspective views.

2 shows the upper die in more detail, the upper die has a casting space open downward while having an inner circumferential surface corresponding to the outer shape in the central area of the lower surface, and the central area of the upper surface communicates with the casting space and the molten metal This injection hole is formed through.

The injection hole coupled to the center of the upper die and the upper die are coupled with a fixing member, and the fixing members are also coupled to the outer side of the upper die at a predetermined angular interval than the central fixing member of the upper die. These fixing members reach the projected position so as to face the stopper formed on the lower mold.

That is, in the upper mold, the upper mold is fixed to the upper part of the lower mold while the central region of the lower mold in which the casting space is formed is located in contact with the central region of the upper surface of the lower mold.

In addition, alignment members installed in the radial direction are assembled to both the upper and lower molds, so that it is possible to visually confirm whether the positions of the upper and lower molds are aligned with the naked eye.

On the other hand, a through hole (not shown) into which the extraction pin can be inserted is formed in the upper die. The through hole is an opening through hole leading to the casting space and plays a role in pushing the ejected product when the molded product is taken out from the mold.

3 shows the configuration of the lower mold.

The lower mold is coupled to the upper part of the mold base that axially rotates parallel to the ground with respect to the central axis during the centrifugal casting process, sharing the central axis with the mold base, and the central area of the upper surface is a multi-stage having a higher height than the outer area of the upper surface formed into a structure.

That is, the lower mold is a disk-shaped lower plate coupled by sharing the central axis of rotation of the mold base and the central axis of the lower mold in the upper direction of the mold base; and a disk shape having a smaller radius than the lower plate, the lower plate and an upper plate that is seated and fixed in the central region of the upper surface of the .

The upper surface of the upper plate has a truncated cone-shaped diffusion region having a diameter smaller than the width of the lower open region of the casting space of the upper mold, but increasing in height from the outer region toward the center.

The alignment member has an inner diameter disposed at one end of the passage adjacent to the center direction of the upper die is formed smaller than the inner diameter of the other section, and the other end section of the passage has a body provided in a shape in which a thread is formed along the inner circumferential surface.

The locking protrusion is formed along the periphery of the side surface of the upper plate, and a concave groove shape having a low depth is formed in association. Due to this locking jaw and groove structure, the coupling between the upper and lower molds can be stably fixed.

4 is a view showing the shape of a centrifugal casting inlet for manufacturing a hybrid brake disc.

The inlet is fixed to the upper die by a fixing member.

In this way, it is possible to implement a mold for centrifugal casting in which the position of the upper and lower molds are stably fixed and the alignment state can be maintained.

The right of the present invention is not limited to the above-described embodiments, but is defined by the claims, and a person of ordinary skill in the art can make various modifications and adaptations within the scope of the claims. it is self-evident

Claims (5)

During the centrifugal casting process, on the upper part of the mold base that rotates parallel to the ground with respect to the central axis, the mold base and the central axis are shared and combined, and the central area of the upper surface has a higher height than the outer area of the upper surface. Ha Hyung; and
An upper mold facing the lower mold, having a casting space open downward in a central region of a lower surface, and an upper mold in which an injection hole is formed in communication with the casting space to inject molten metal in the central region of the upper surface;
The lower mold includes a lower plate in the shape of a disk that shares the central axis of rotation of the mold base and the central axis of the lower mold in the upper direction of the mold base and is coupled thereto; and
An upper plate provided in the shape of a disk having a smaller radius than the lower plate, being seated and fixed in the central region of the upper surface of the lower plate, and having a locking protrusion formed along the periphery of the outer surface;
A centrifugal column for manufacturing a hybrid brake disc, characterized in that the upper and lower molds each include an alignment member coupled from the outer side toward the center, wherein the alignment member enables confirmation of whether the upper and lower molds are aligned. Quiet mold. The method of claim 1,
The upper surface of the upper plate of the lower mold increases in height from the outer region toward the center, but has a truncated cone-shaped diffusion region having a diameter smaller than the width of the lower open region of the casting space of the upper mold. For centrifugal casting molds.


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