CN212191129U - Cold core assembly forming die for brake disc - Google Patents

Abstract

The utility model discloses a brake disc cold core assembly forming die, which comprises a lower template, wherein a cavity for forming a brake disc sand core is arranged on the lower template; the bottom of the cavity is provided with a threaded hole penetrating through the lower template, the threaded hole is internally connected with an ejector rod, the upper end of the ejector rod is fixedly provided with an ejection disc, the ejection disc is tightly attached to the inner wall of the cavity, the ejection disc is used for molding the bottom of the brake disc sand core, the ejection disc is provided with a plurality of molding holes, and the molding holes are used for molding the flange columns of the brake disc sand core; when the ejector rod rotates relative to the lower template, the ejection disc rotates and moves upwards, and meanwhile, the matching of the profile hole and the flange column limits the rotation of the brake disc sand core relative to the ejection disc, so that the brake disc sand core is ejected out of the cavity in a rotating mode. Has the advantages of high forming quality and convenient demoulding.

Description

Cold core assembly forming die for brake disc

Technical Field

The utility model relates to the technical field of mold, concretely relates to brake disc cold core assembly forming die.

Background

The sand core is a material for manufacturing a core in casting production and consists of casting sand, a molding sand binder and the like. A brake disc is a friction coupling of a disc brake, and has a friction coefficient as high and stable as possible, and suitable wear resistance, heat radiation, heat capacity, and the like, in addition to strength and rigidity required as a member. Therefore, the sand core (cold core assembly) for molding the brake disc has high requirements for roundness and smoothness. In order to ensure the roundness and the smoothness of the sand core, the sand core forming die needs to be tightly attached to the sand core during forming, and the existence of gaps is reduced as much as possible. Due to the presence of the molding requirements, the demolding of the mold is affected, and particularly, the sand core is not easy to eject from the lower mold.

Therefore, how to improve the existing cold core assembly forming mold of the brake disc so as to overcome the above disadvantages is a problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a high shaping quality, and make things convenient for brake disc cold core assembly forming die of drawing of patterns.

In order to achieve the above purpose, the utility model adopts the technical scheme that: a brake disc cold core assembly forming die comprises a lower die plate, wherein a cavity for forming a brake disc sand core is formed in the lower die plate; the method is characterized in that: the bottom of the cavity is provided with a threaded hole penetrating through the lower template, the threaded hole is internally connected with an ejector rod, the upper end of the ejector rod is fixedly provided with an ejection disc, the ejection disc is tightly attached to the inner wall of the cavity, the ejection disc is used for molding the bottom of the brake disc sand core, the ejection disc is provided with a plurality of molding holes, and the molding holes are used for molding the flange columns of the brake disc sand core;

when the ejector rod rotates relative to the lower template, the ejection disc rotates and moves upwards, and meanwhile, the matching of the profile hole and the flange column limits the rotation of the brake disc sand core relative to the ejection disc, so that the brake disc sand core is ejected out of the cavity in a rotating mode.

As an improvement, a plurality of vent holes penetrating through the lower template are formed in the cavity. On one hand, the exhaust holes are used for exhausting during molding, so that bubble depressions are prevented from being formed on the surface of the sand core; on the other hand, the setting of exhaust hole can avoid forming the negative pressure between sand core and the die cavity when the drawing of patterns, makes the drawing of patterns more smooth and easy.

Compared with the prior art, the utility model has the advantages of: the scheme adopts a rotary ejection demoulding mode, so that the sand core of the brake disc tightly attached to the inner wall of the cavity can be smoothly separated on the premise of ensuring the forming quality. And the top disc is fixed in the circumferential direction by utilizing the structure of the brake disc, so that the rotary demoulding is realized. In addition, the ejector rod of the scheme adopts threaded connection, and is simple in structure, convenient to operate and long in service life.

Drawings

Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention;

fig. 2 is a half sectional view of a preferred embodiment according to the present invention;

fig. 3 is an exploded view of a preferred embodiment according to the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

As shown in fig. 1 to 3, a preferred embodiment of the present invention includes a lower template 1, wherein the lower template 1 is provided with a cavity 11 for molding a brake disc sand core 100; the bottom of the cavity 11 is provided with a threaded hole 12 penetrating through the lower template, the threaded hole 12 is internally threaded with an ejector rod 2, the upper end of the ejector rod 2 is fixedly provided with an ejection disc 3, the ejection disc 3 is tightly attached to the inner wall of the cavity, the ejection disc 3 is used for molding the bottom of the brake disc sand core 100, the ejection disc 3 is provided with a plurality of molding holes 31, and the molding holes 31 are used for molding the flange columns 101 of the brake disc sand core 100.

The working principle is as follows: when the ejector rod 2 rotates relative to the lower template 1, the ejection disc 3 rotates and moves upwards, and meanwhile, the matching of the profile hole 31 and the flange column 101 limits the rotation of the brake disc sand core 100 relative to the ejection disc 3, so that the brake disc sand core 100 is ejected out of the cavity 11 in a rotating mode.

In this embodiment, the cavity 11 is further provided with a plurality of vent holes 13 penetrating through the lower template 1.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (2)

1. A brake disc cold core assembly forming die comprises a lower die plate, wherein a cavity for forming a brake disc sand core is formed in the lower die plate; the method is characterized in that: the bottom of the cavity is provided with a threaded hole penetrating through the lower template, the threaded hole is internally connected with an ejector rod, the upper end of the ejector rod is fixedly provided with an ejection disc, the ejection disc is tightly attached to the inner wall of the cavity, the ejection disc is used for molding the bottom of the brake disc sand core, the ejection disc is provided with a plurality of molding holes, and the molding holes are used for molding the flange columns of the brake disc sand core;

when the ejector rod rotates relative to the lower template, the ejection disc rotates and moves upwards, and meanwhile, the matching of the profile hole and the flange column limits the rotation of the brake disc sand core relative to the ejection disc, so that the brake disc sand core is ejected out of the cavity in a rotating mode.

2. A brake disc chill core assembly forming mold as defined in claim 1 wherein: and a plurality of vent holes penetrating through the lower template are formed in the cavity.

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