KR20090017921A - Mold for caliper housing core producing and mold for caliper housing casting - Google Patents

Abstract

A mold for caliper housing core production is provided to reduce the required space when loading a caliper housing core and to increase dimensional accuracy of a caliper housing to be cast, and a mold for caliper housing casting is provided to prevent heat from concentrating on one side of the caliper housing to be cast and to lower the injection pressure of molten iron. A mold for casting a caliper housing comprises a first hot top(530) formed on an upper one side of a core body part-placing groove(320) formed in the mold, and a second hot top(540) formed on an upper one side of a cylinder housing production part-placing groove(330). The mold for casting a caliper housing further comprises one or more long runners(510,520) dented in both sides of the mold, and second key parts(550) projected from both sides of the core body part-placing groove.

Description

Mold for casting caliper housing core and mold for casting caliper housing {Mold for Caliper Housing Core Producing and Mold for Caliper Housing Casting}

The present invention relates to a mold for producing a caliper housing core and a mold for casting a caliper housing. More specifically, by removing the pressure separator frame from the mold for producing the caliper housing core used in the conventional double casting process, the pressure separator is removed from the produced caliper housing core, thereby reducing the space required for the loading of the caliper housing core. And a key groove is formed in the caliper housing core in response to the formation of the first key portion in the mold for producing the caliper housing core, thereby casting the caliper housing when casting the caliper housing using the caliper housing core. It relates to a mold for producing a caliper housing core in which the caliper housing core is fixed in a mold for casting the caliper housing, thereby improving the dimensional accuracy of the caliper housing in which the second key portion is fitted into the key groove of the caliper housing core. .

In addition, in the mold for casting a caliper housing by a conventional double casting method, one press portion formed at the center of the upper portion of the core body portion mounting groove is separated into a first press portion and a second press portion, and the first press portion is By separating / forming the upper portion of the core body seating recess upper side and the second hot water part on the upper side of the cylinder housing generating portion recessing groove, it is possible to prevent heat from concentrating on one side of the caliper housing to be cast, and to cast a conventional caliper housing. By separating / forming the runner formed in one mold into the first runner and the second runner on both sides of the mold, the waste water injected through one runner is injected through the two runners for the same amount. A mold for casting a caliper housing that can lower the injection pressure.

In general, a brake system of a vehicle is classified into a main brake mainly used for driving and a parking brake used for parking, and the main brake is configured to brake the hydraulic pressure generated by the operation of the brake pedal. It is classified as a hydraulic brake and an air brake that generates a braking force by using the pressure of compressed air when a large braking force is required such as a hydraulic brake and a large vehicle. The above hydraulic brake is provided on both sides of a disk rotated with a wheel. There is a disc brake that causes the brake pads to be pressed by hydraulic pressure to brake.

FIG. 1 is a perspective view illustrating a structure of a general disc brake. As shown in FIG. 1, a general disc brake includes a brake disc 110 rotating together with wheels and a caliper bracket 140 surrounding one side of the brake disc 110. ), The caliper bracket 140 is connected to the bolt 150 and comprises a caliper housing 120 in which the cylinder 130 is located.

The caliper housing 120 has coupling ends 170 formed on both sides thereof, and is connected to the coupling part 180 formed on both sides of the caliper bracket 140 and the bolt 150.

At this time, the coupling end 170 is rotatable and spaced with respect to the coupling portion 180 is connected.

When the driver presses the brake, oil flows into the cylinder housing 190 and pushes the cylinder 130, and when the cylinder 130 protrudes and pushes the brake pad 115 gradually, the coupling end 170 is coupled to the coupling unit 180. The pressure unit 160 is pulled toward the brake pad 115 while being gradually spaced apart from each other, thereby compressing the brake pad 115 to the brake disc 110 by the interaction between the cylinder 130 and the pressure unit 160. To generate braking force.

The caliper housing 120 constituting the disc brake as described above is made by casting, the forming method is by casting by the mold for producing the caliper housing core and the caliper housing.

In particular, as a method for casting a caliper housing, a double casting method that can cast two caliper housings at a time with one caliper housing middle is used as disclosed in US Pat. No. 5,551,8062.

FIG. 2A is a plan view and a front view of a mold for producing a caliper housing core used in a conventional double casting method, and FIG. 2B is a perspective view of a conventional caliper housing core produced by the mold of FIG. 2A.

As shown in FIG. 2A, a mold for producing a caliper housing core used in a conventional double casting method includes a left and a right cylinder frame 210 and 215, a press separator frame 220, and a middle body frame 230. It is configured to include.

In FIG. 2A, a mold is shown in which three caliper housing cores are produced by one process, but the number may be increased.

The process of producing the caliper housing core by the mold of Figure 2a is as follows.

First, the first mold (the left cylinder frame 210 is formed higher than the right cylinder frame 215) as shown in FIG. 2A and the second mold (the left cylinder frame 210) symmetric to the right cylinder frame 215 Lower than that).

Thereafter, the first mold and the second mold prepared above are faced to each other, and sand and resin are filled therebetween, followed by curing.

At this time, according to the method of hardening sand, etc., the shell type (Shell Type) and the cold type (Cold Type) core are roughly classified. It is a method of producing core by injecting amine gas without heating and curing sand and resin.

When the mold is opened and closed after the above hardening operation, a caliper housing core is made as shown in FIG. 2B, and the caliper housing middle made through such a process includes a cylinder housing generating unit 240, a core body part 250, and a pressure separator 260. ), The pressing unit generating groove 270 is formed.

The cylinder housing generating unit 240 is formed in a cylindrical shape and protrudes on both sides of the core body part 250, and the pressing part generating groove 270 is provided in a recessed shape in the middle body part 250, and the pressure separator 260 is provided. ) Is formed to protrude into a rectangular parallelepiped shape in which a recessed groove is formed in the upper portion of the core body portion 250.

3 is a plan view and a front view of a mold for casting a caliper housing by a conventional double casting method.

As shown in FIG. 3, in the mold for casting the caliper housing by the conventional double casting method, the pressure part 310 is located at the upper center of the core body seating recess 320, and the runner 340 is located at one side. Formed.

The process of producing the caliper housing by the mold of Figure 3 is as follows.

First, the operator inserts the caliper housing core shown in FIG. 2B in the mold of FIG. 3 in accordance with the core body seating recess 320 and the cylinder housing generator seating recess 330.

Thereafter, the mold is symmetrical to the mold of FIG. 3, and the mold is injected through the runner 340 to fill the space between the mold and the core.

At this time, the molten water is also filled in the hot water unit 310, the role of the hot water unit 310 is to fill in the blank space is reduced when the cold water.

Through the above process, when the water filled in the space between the mold and the core cools, the mold is removed and the core is destroyed to obtain a caliper housing 120 (see FIG. 1).

The mold for producing the caliper housing core used in the conventional double casting method is formed with a pressure part, thereby requiring a lot of storage space when the caliper housing core produced after the production of the caliper housing core is accumulated. When inserting the core into the mold for casting the caliper housing, the pressure separator formed in the caliper housing core used to fix the caliper housing core in the mold for casting the caliper housing when filling the water. When the caliper housing core moves slightly within the mold for casting the caliper housing due to the space between the pressure parts, there is a problem that the dimensional accuracy of the caliper housing is lowered.

In addition, in the mold for casting the caliper housing by the conventional double casting method, the pressure portion is located in the middle of the upper portion of the middle body seating groove, so heat is concentrated on one side of the middle body seating recess, thereby changing the product size. There was a concern that the dimensions were to be changed, the runner is injected into the molten iron is formed only on one side of the mold for casting the caliper housing, there was a problem that the injection pressure of the molten iron is increased.

In order to solve this problem, the present invention removes the pressure separator frame from the mold for producing the caliper housing core used in the conventional double casting process, thereby removing the pressure separator on the produced caliper housing core so that the accumulation of the caliper housing core As the first key portion is formed in the mold for producing the caliper housing core, a key groove is formed in the caliper housing middle to correspond to the space required for the casting of the caliper housing using the caliper housing middle. The second keyed portion of the mold for casting is inserted into the key groove of the caliper housing core to produce a caliper housing core, in which the caliper housing core is fixed in the mold for casting the caliper housing, thereby increasing the dimensional accuracy of the caliper housing being cast. Providing mold for To have its purpose.

In addition, in the mold for casting a caliper housing by a conventional double casting method, one press portion formed at the center of the upper portion of the core body portion mounting groove is separated into a first press portion and a second press portion, and the first press portion is By separating / forming the upper portion of the core body seating recess upper side and the second hot water part on the upper side of the cylinder housing generating portion recessing groove, it is possible to prevent heat from concentrating on one side of the caliper housing to be cast, and to cast a conventional caliper housing. By separating / forming the runner formed in one mold into the first runner and the second runner on both sides of the mold, the waste water injected through one runner is injected through the two runners for the same amount. The object is to provide a mold for casting a caliper housing that can lower the injection pressure.

In order to achieve the above object, the present invention provides a mold for producing a caliper housing core, wherein a first key portion protruding from both sides of the middle body frame formed in the mold is formed. Provide the mold.

In addition, the present invention is a mold for casting a caliper housing, wherein the first pressure portion is formed on one side of the upper portion of the core body portion seating groove formed in the mold, and the second pressure portion is formed on the upper side of the cylinder housing generating portion seating groove. Provided are a mold for casting a caliper housing which is formed.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

4A is a plan view of a mold for producing a caliper housing core according to an embodiment of the present invention, and FIG. 4B is a perspective view of the caliper housing core produced by the mold of FIG. 4A.

As shown in FIGS. 4A and 4B, protruding first key portions 410 are formed on both sides of the core body frame 230 formed in the mold 400 for producing the caliper housing core according to the embodiment of the present invention. It is characteristic.

Here, the meaning that the first key portion 410 is formed to protrude on both sides of the middle body frame 230, the first key portion 410 is formed to protrude inward from the outer direction of the middle body frame 230 Its width (i.e., the axial direction connecting the left and right cylinder frames 210, 215) is the same as the keyway 430 shown in Figure 4b and its height (i.e. for producing the caliper housing cores). The direction in which the mold 400 is cut up and down) is formed at a height corresponding to half of the height of the key groove 430 shown in FIG. 4B, and the cross section of the first key portion 410 is a rectangular rectangle. It means that it is preferably formed in a cross-sectional shape.

Here, the height of the first key portion 410 is formed to a height corresponding to half of the height of the key groove 430 is a caliper by bonding the mold 400 for producing two caliper housing cores provided symmetrically with each other This is because the housing core is manufactured.

The first key portion 410 is a portion formed at the position where the pressure separator frame frame 220 (refer to FIG. 2A), which is formed in a mold for producing a caliper housing core, is formed. In the mold for casting the caliper housing according to the embodiment, the pressure portion 310 (refer to FIG. 3), which is formed at the upper center of the conventional middle body portion seating groove 320, is disposed at an upper side of the middle body seating groove 320. By separating and forming the first hot water unit 530 and the second hot water unit 540 formed on the upper side of the cylinder housing generating unit seating groove 330, see the hot water separator 260 formed in the caliper housing core according to the related art. ), The second key portion 550 of the caliper housing mold fits into the key groove 430 of the caliper housing core when casting the caliper housing so that the caliper housing core is fixed in the caliper housing mold to lower the caliper. Is the portion formed to be able to increase the dimensional accuracy of the ranging.

The caliper housing cores 420 (hereinafter referred to as `` caliper housing cores '') produced by the mold for producing the caliper housing cores according to the embodiment of the present invention shown in FIG. 4A are the core body as shown in FIG. 4B. Key grooves 430 are formed on both sides of the unit 250, and this feature is different from the caliper housing core in which the prior art pressure separator 260 (see FIG. 2B) is formed.

4A illustrates a mold for producing a caliper housing core in which six caliper housing cores are manufactured in one production process, but less than five or seven or more may be possible.

5 is a plan view of a mold for casting a caliper housing according to an embodiment of the present invention.

As shown in FIG. 5, a mold for casting a caliper housing according to an exemplary embodiment of the present invention includes a first pressure part 530 and a cylinder housing generator seating groove formed on an upper side of the core body seating recess 320. One or more runners 510 are formed in each of the two sides of the mold for casting the caliper housing according to an embodiment of the present invention, and formed in a recessed shape. , 520 is formed and the second key portion 550 protruding from both sides of the core body seating recess 320 is formed.

The middle body seating recess 320 is a portion in which the middle body portion 250 of the caliper housing core 420 shown in FIG. 4B is seated. 530 is formed.

That is, the first pressure portion 530 is preferably formed between the upper one side of the middle body portion mounting groove 320 (particularly, the first runner 510 and the upper one side of the middle body portion mounting groove 320). It is provided in a recessed groove shape, the cross section of each of the corners may be rounded, and the portion where the first bath portion 530 and the core body portion seating groove 320 are connected to the water is the first bath portion. After filling in the 530, it will be preferable to be formed in a suitable width and length so that the core body seating groove 320 can be smoothly filled.

The cylinder housing generator seating groove 330 is a portion in which the cylinder housing generator 240 of the caliper housing core 420 shown in FIG. 4B is seated. The pressure part 540 is formed.

That is, the second pressure part 540 is preferably formed between the upper one side of the cylinder housing generator seating groove 330 (in particular, the second runner 520 and the upper one side of the cylinder housing generator seating groove 330). It is preferably provided in a recessed groove shape, the shape of the cross section or the like is preferably formed in the same manner as the first hot water portion 530 mentioned above.

As such, the first pressure part 530 formed on the upper side of the middle body seating recess 320 and the second pressure part 540 formed on the upper side of the cylinder housing generator seating recess 330 may form a caliper housing. When the water is cooled to reduce the volume is provided to fill the voids, the first hot water unit 530 to the pressure unit 310 (see Fig. 3) that is formed only one side of the conventional core body portion seating groove 320 ) And the second hot water unit 540 can be expected to reduce the thermal expansion of the mold by forming a single hot water unit 310.

That is, the core body portion by separating the volume occupied in the upper portion of the core body seating recess 320 into the first and second pressure parts 530 and 540 which occupy about half the volume. By forming on the side surface of the seating groove 320 and the cylinder housing generating unit seating groove 330 it is possible to dissipate the heat concentrated in the prior pressure portion 310 to reduce the thermal expansion of the mold.

The first runner 510 and the second runner 520 are recessed on both sides of the mold for casting the caliper housing according to the embodiment of the present invention. The first runner 510 and the second runner 520 are formed. Through the water is filled in the cylinder housing generating unit seating groove 330 and the core body portion mounting groove 320 and the like through the first hot water 530 and the second hot water 540, respectively.

Cross sections of the first runner 510 and the second runner 520 may be provided in a rectangular cross-sectional shape or may be provided in a semicircular shape, such that the water is smoothly provided through the first runner 510 and the second runner 520. As long as it can move, it may be provided in various shapes.

The first runner 510 and the second runner 520 can reduce / inject the molten metal by separating and forming the runner 340 (see FIG. 3) formed on only one side of a mold for casting a caliper housing on both sides. It would be.

The second key portion 550 protrudes from both sides of the core body seating recess 320, and the second key portion 550 includes a key groove 430 formed in the caliper housing core 420 illustrated in FIG. 4B. Since the inserted caliper housing core 420 is fixed to the mold for casting the caliper housing, its shape (ie, cross-sectional shape, height, width, etc.) is the first formed in the mold for producing the caliper housing middle shown in FIG. 4A. It is preferable to form the same as the key portion 410, a detailed description thereof will be omitted.

Using a mold for casting the caliper housing shown in FIG. 5 will produce six caliper housings in one casting process, but the number may vary depending on how many parts the caliper housing cores are seated in the mold. will be.

FIG. 6 is a plan view illustrating a path in which waste water is filled in a mold for casting a caliper housing according to an exemplary embodiment of the present invention.

As shown in FIG. 6, the waste water injected through the injection hole 610 is partially filled in the first hot water unit 530 through the first runner 510 and partially filled in the core body seating recess 320. do.

In addition, a portion of the waste water passing through the second runner 520 is filled in the second pressure portion 540 and a portion is also filled in the middle body seating groove 320.

Through the above process, the water is filled in the middle body seating groove 320, and again some of the water is filled in the other middle body seating groove and the pressure portion generated in the lower side of the mold for casting the caliper housing. When the water is filled in the mold for casting the caliper housing and cooled to remove the mold and the caliper housing core for casting the caliper housing, the caliper housing 120 shown in FIG. 1 is manufactured.

The above description exemplarily illustrates the technical idea of the present invention, and those skilled in the art may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

1 is a perspective view showing a configuration of a general disc brake;

2A is a plan view and a front view of a mold for producing a caliper housing core used in a conventional double casting process;

FIG. 2B is a perspective view of a conventional caliper housing core produced by the mold of FIG. 2A; FIG.

3 is a plan view and a front view of a mold for casting a caliper housing by a conventional double casting method;

4A is a plan view of a mold for producing a caliper housing core according to an embodiment of the present invention;

4B is a perspective view of a caliper housing core produced by the mold of FIG. 4A;

5 is a plan view of a mold for casting a caliper housing according to an embodiment of the present invention; And

FIG. 6 is a plan view illustrating a path in which waste water is filled in a mold for casting a caliper housing according to an exemplary embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

110: brake disc 120: caliper housing

130: cylinder 140: caliper bracket

150: bolt 160: pressurization

170: coupling end 180: coupling

210: left cylinder frame 215: right cylinder frame

220: pressure separator frame 230: core body frame

240: cylinder housing generating unit 250: core body portion

260: pressure separator 270: pressure generation groove

310: pressure portion 320: core body seating groove

330: cylinder housing generating unit seating groove

340: runner 410: first key portion

430: key groove 510: first runner

520: second runner 530: first pressure portion

540: second pressure part 550: second key part

610: injection hole

Claims (4)

In the mold for producing the caliper housing core, A mold for producing a caliper housing core, characterized in that the first key portion protruding from both sides of the core body frame formed in the mold. In a mold for casting a caliper housing, The mold for casting a caliper housing, characterized in that the first pressing portion is formed on one side of the upper portion of the core body portion seating groove formed in the mold, and the second pressing portion is formed on the upper side of the cylinder housing generating portion mounting groove. The method of claim 2, Molds for casting a caliper housing, characterized in that one or more runners are formed long in each side of the mold. The method of claim 2, A mold for casting a caliper housing, characterized in that the second key portion protruding from both sides of the core body seating groove is formed.

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