KR20100035020A - Mold apparatus of centrifugal casting machine - Google Patents

Abstract

The present invention provides a mold table that is rotationally driven at an angle by an index motor, a plurality of mold bases disposed at equal intervals along the circumference of the mold table, and at least one mold base moved to a predetermined position among the plurality of mold bases. One or more mold rotation motors installed to drive rotation, an upper mold separating mechanism disposed at a product take-out position of the mold table to move the upper mold of the mold from the lower mold after the product is produced, and a molten metal disposed on the upper mold separating mechanism It is configured to include a temperature sensor for sensing the temperature of the mold before the injection, thereby precisely measuring the temperature of the mold to prevent the castability of the melt due to the rapid temperature change of the molten metal injected into the mold And further, the organization of the product becomes uneven Relates to a device for centrifugal casting mold can be prevented.

Description

Mold apparatus of centrifugal casting machine

The present invention relates to a centrifugal casting machine, and more particularly, to a mold apparatus of a centrifugal casting machine, in which a temperature sensing sensor for sensing a temperature of the mold is disposed in a separation mold for lifting an upper mold of a mold.

In general, a centrifugal casting machine is a device for injecting molten metal into a rotating mold and casting a product using the centrifugal force of the rotating mold. Such a product that can be cast by a centrifugal caster includes a floating seal used for crawling.

In more detail, the caterpillar is used in agriculture, civil vehicles, such as excavators and bulldozers, and is used in military tanks and armored vehicles.

The tracked vehicle is provided with a track roller for supporting the chain belt to rotate. The track roller is filled with lubricating oil to reduce rotational friction to reduce wear, and the floating seal is mounted to prevent the lubricating oil from leaking out or introducing foreign substances from the outside.

In the method of manufacturing the floating yarn, the molten metal is injected into a centrifugal casting mold, and then a circular ring shaped yarn is manufactured by centrifugal casting method, and the circular ring shaped thread is precisely processed through a finishing process, a grinding process, and a lapping process. It is processed and produced.

However, in the conventional apparatus for manufacturing a floating seal, a sensor for measuring the temperature of the mold before the molten metal is injected into the mold is placed too far from the mold so that the temperature of the mold cannot be accurately measured and injected into the mold. Due to the rapid temperature change of the molten metal, the castability of the molten metal is lowered, and thus, the structure of the floating seal is uneven.

The present invention is a temperature sensor for measuring the temperature of the mold before the molten metal is injected into the mold for manufacturing the product by centrifugal casting method is disposed in the upper mold separation mechanism adjacent to the mold, to accurately measure the temperature of the mold The purpose of the present invention is to provide a mold apparatus of a centrifugal caster which can prevent the casting property of the molten metal from being lowered due to the rapid temperature change of the molten metal injected into the mold and further prevent the uneven structure of the product. have.

The present invention for realizing the above object is a mold table that is rotationally driven by a predetermined angle by an index motor, a plurality of mold bases arranged at equal intervals along the circumference of the mold table, to a predetermined position of the plurality of mold bases One or more mold rotation motors installed to rotationally drive the one or more mold bases that have been moved, an upper mold separating mechanism disposed at a product take-out position of the mold table to move the upper mold of the mold from the lower mold after the product is produced, and the upper mold separating mechanism Provided is a mold apparatus of the centrifugal caster is disposed in the mold including a temperature sensor for sensing the temperature of the mold before the molten metal is injected.

The temperature sensor may be disposed in the upper mold separation mechanism adjacent to the outside from one side of the mold.

The temperature sensor may be an infrared sensor.

In the mold apparatus of the centrifugal casting machine according to the present invention, a temperature sensor for measuring the temperature of the mold before the molten metal is injected into the mold for manufacturing the product by the centrifugal casting method is disposed in the upper mold separation mechanism adjacent to the mold, By precisely measuring the temperature of the mold to prevent the castability of the melt due to the rapid temperature change of the molten metal injected into the mold, it is possible to prevent the uneven structure of the product.

An embodiment of the present invention having the above-described effect will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram showing an automatic production system for manufacturing a floating seal including a mold apparatus of a centrifugal caster according to the present invention.

Referring to FIG. 1, an automatic production line for manufacturing a floating chamber including a mold apparatus of a centrifugal caster of the present invention is moved along a linear rail 2b to use a melting furnace 1 using a molten metal injection cup 2a. A molten metal injection device 2 which floats a molten metal for forming a floating chamber from the molten metal and supplies it to the mold 4 by a predetermined amount, and a metal mold 4 that rotates on the mold table 5 to form a yarn by centrifugal casting. The centrifugal casting apparatus 3, a weighing apparatus 7 for measuring the weight of the yarn taken out from the centrifugal casting apparatus 3, and a burr remaining in the inner and outer diameters of the weighed yarn in the weighing apparatus 7 Take-out / transfer which takes out the thread from the mold 4 of the deburring apparatus 9 and centrifugal casting apparatus 3 which remove | eliminates, and conveys a thread in order of the weighing apparatus 7 and the deburring apparatus 9. It comprises a device (6).

In addition, the conveyor 12 which transfers the yarn after the burr removal is carried out by the deburring apparatus 9, the chamber cooling apparatus 13 equipped with a blower to cool the thread which passes through the conveyor 12 by air cooling method, and a conveyor The finishing processing machine 15 which processes the inner peripheral surface of the said thread which passed the thread cooling apparatus 13 through 12, and the grinding processing machine 17 which processes the one surface of the finishing-processed thread located in parallel with the finishing processing machine 15. ), A lapping machine 20 for precisely processing the yarn machined by the grinding machine 17, and a yarn for washing the ground yarn, which is located between the grinding machine 17 and the lapping machine 20. It comprises a washing unit 19, and a conveyor 23 for discharging the yarn discharged from the lapping processing machine (20).

The mold apparatus of the centrifugal casting machine according to the present invention, which is provided in the automatic production system for manufacturing the floating seal as described above, will be described with reference to FIGS. 2 to 4.

2 is a front configuration diagram showing a mold apparatus of the centrifugal casting machine, FIG. 3 is a plan view showing a mold apparatus of the centrifugal casting machine, and FIG. 4 is a detail view "A" of FIG.

2 to 4, the mold apparatus 3 of the centrifugal casting machine according to the present invention includes a base 31 supporting the whole and a mold table 5 rotatably installed on the upper side of the base 31. And a plurality of mold bases arranged at regular intervals such that the index motor 51 for driving the mold table 5 to rotate by a predetermined angle and the mold 4 capable of manufacturing the floating seal are positioned on the mold table 5. (41), a plurality of mold rotation motors (45) provided below the mold table (5) to drive the plurality of mold bases (41) to rotate, and at a position where the thread is taken out from the mold table (5). And a yarn take-out / transfer device 6 configured to take out and transfer the centrifugally cast yarn manufactured in 4).

On the mold table 5, as shown in FIG. 3, six mold bases 41 are arranged at intervals of 60 degrees. Of course, the mold base 41 may be arranged at a predetermined interval on the mold table 5 in one set of two. In this embodiment, only the former case is illustrated.

Referring to FIG. 3, 41A is a position at which molten metal is injected while the mold 4 rotates, 41D is a position at which the temperature of the mold 4 is measured while the yarn is taken out, and 41E is a temperature result measured at 41D. It is a position which pre-heats the metal mold | die 4, and 41F is a position where acetylene application | coating is performed to the metal mold | die 4.

Of course, although not shown in the figure, the base 31 on which each mold 4 is located is provided with an apparatus for preheating the mold 4, an acetylene coating mechanism, and the like.

2 to 4, the mold rotation motor 45 transmits rotational force such that the mold base 41 is rotated when the plurality of mold bases 41 are rotated to a position where the mold rotation motors 45 are installed.

The mold base 41 is configured such that the lower die 4B of the mold 4 is coupled, and the gear 43 and the rotation shaft 42 which are engaged with the gear 46 disposed on the mold rotation motor 45 to receive rotational force. Is configured to rotate. Of course, the circumference of the rotating shaft 42 is supported by a bearing provided on the mold table 5.

As shown in Fig. 3, the mold rotation motor 45 has a molten metal injection position 41A, a thread taken out, and a position 41C before the position 41D where the temperature of the mold 4 is measured, and an acetylene gas application position 41F. 3) are installed.

The thread take-out / transfer device 6 includes an upper die separating mechanism 61 for vertically moving the upper die 4A of the mold 4 and a yarn formed by centrifugal casting on the lower die 4B as shown in detail in FIG. 4. It is comprised including the clamp feed mechanism 65 which moves up.

The upper mold separating mechanism 61 is a clamp mechanism that holds the upper mold 4A of the mold 4 to separate and move the lower mold 4B when the floating seal is manufactured in the mold 4 by the rotation of the mold rotating motor 45. And a vertical transfer mechanism 63 mounted on the base 31 to move the clamp mechanism 62 up and down. The vertical transfer mechanism 63 is preferably configured to be operated up and down by the hydraulic cylinder 64. Of course, it is also possible to use a pneumatic cylinder instead of the hydraulic cylinder 64. Hereinafter, the hydraulic cylinder 64 will be limited to the following description.

In addition, the clamp mechanism 62 of the upper die separating mechanism 61 in the thread take-out / transfer device 6 is equipped with a spring that can press the upper die 4A in the center when the upper die 4A is lifted. The upper mold 4A is stably held and detachable easily.

In addition, inside the clamp mechanism 62 of the upper mold separating mechanism 61, a temperature sensor 67 for detecting the temperature of the mold 4 is disposed before the molten metal is injected into the mold 4. The temperature sensor 67 may be attached to the inside of the clamp mechanism 62 using an adhesive, but in this embodiment, the temperature sensor 67 is shown to be mounted through the mounting bracket 69.

In addition, the temperature sensor 67 may be disposed inside the clamp mechanism 62 as described above, but the present invention is not limited thereto, and the temperature sensor 67 may not be hindered in the operation of the actual take-out / transfer device 6. Any position of the upper mold separation mechanism 61 adjacent outward from one side of the mold 4 may be disposed.

As described above, the temperature sensor 67 is disposed in the upper mold separating mechanism 61 adjacent to the outside from one side of the mold 4, so that the temperature sensor 67 compared to the temperature sensor installed on the upper end of the conventional linear rail 2b. Since the temperature of (4) can be measured precisely, the precise preheating operation | work of the metal mold | die 4 can be performed, and this causes the castability of the molten metal due to the rapid temperature change of the metal melt | poured into the metal mold | die 4 to worsen. Can be prevented and further, the organization of the floating seal can be prevented from being uneven.

In addition, the temperature sensor 67 is disposed in the upper mold separating mechanism 61 adjacent to the mold 4 compared with the conventional one, so that the temperature of the mold 4 can be accurately measured, and the upper mold ( By measuring the temperature of 4A) and separately measuring the temperature of the lower mold 4B at the 41E position, the temperature of the mold 4 at the 41D position can be measured at a time, so that the temperature measurement error of the mold 4 can be reduced. do.

In addition, the temperature sensor 67 is preferably an infrared sensor for measuring the temperature in a non-contact manner rather than a sensor for measuring the temperature in a semi-permanent use.

On the other hand, the clamp feed mechanism 65 is a clamp mechanism 66 for holding the seal (S) located in the lower mold 4B, the clamp mechanism 66 is installed and vertically and horizontally moved while weighing device (7) and It is comprised by the horizontal feed mechanism 68 comprised so that the yarn S taken out by the deburring apparatus 9 can be continuously conveyed.

Referring to the operation of the mold apparatus of the centrifugal caster according to the present invention configured as described above are as follows.

The mold table 5 is moved by a predetermined angle using the index motor 51. As the mold table 5 rotates, the mold base 41 is ejected at the molten metal injection position 41A and the seal as shown in FIG. In addition, when it is located at the previous position 41C and the acetylene gas application position 41F of the position 41D where the temperature measurement of the mold 4 is performed, each gear 43 and the mold rotation motor 45 of the mold base 41 are located. Each of the gears 46) is engaged with each other to rotate.

At this time, the molten metal injection device 2 is moved along the linear rail 2b to form the floating seal, and the molten metal injection cup 2a floats the molten metal from the melting furnace 1 to melt the centrifugal casting device 3. When the injection position 41A is reached, the mold base 41 located at the melt injection position 41A rotates the mold 4 while rotating at an appropriate speed of 500 to 3000 rpm. In such a state, when the molten metal injection cup 2a is inclined, the molten metal is injected into the rotating mold 4 while centrifugal casting is performed.

That is, the injected molten metal is spread out in the outer diameter direction by the centrifugal force of the mold 4 so that the outer diameter is the same as the shape of the mold 4, and the inner diameter can form a floating seal which is dug in a circular shape.

In order to effectively cast the yarn by centrifugal casting, application of acetylene soot of appropriate thickness is required, and the mold temperature is continuously checked in order to keep the mold 4 temperature within a suitable range. The mold 4 should be maintained at 200 ° C to 400 ° C. This mold preheating operation is to prevent the castability due to the rapid temperature change when the molten metal is injected into the mold 4, thereby preventing the structure of the floating seal from being uneven.

That is, the temperature of the mold 4 is measured through the temperature sensor 67 disposed in the upper mold separating mechanism 61 at the 41D position, and the mold 4 at the 41E position is based on the measured temperature result of the mold 4. Preheat).

Afterwards, at 41F, acetylene soot is applied to cool the upper mold (4A) and apply acetylene soot to prevent the thread and mold (4) from sticking together. The thinner and more uniformly applied, the better the properties.

Thereafter, the molten metal is injected into the mold 4 which is rotated by the rotational force of the mold rotation motor 45 at the 41A position to manufacture a floating seal.

Thereafter, when the mold 4 is moved to the 41D position again through the 41B and 41C positions, the clamp mechanism 62 of the upper die separating mechanism 61 holds the upper die 4A of the mold 4 and the vertical transfer mechanism ( 63 is operated in the upward direction by the hydraulic cylinder 64 so that the upper die 4A of the mold 4 is moved away from the lower die 4B.

Subsequently, the clamp mechanism 66 of the clamp feed mechanism 65 catches the thread S located in the lower mold 4B of the mold 4 and moves out the thread S while moving vertically and horizontally, and the weighing apparatus 7 ) And deburring device (9).

1 is a configuration diagram showing an automatic production system for manufacturing a floating seal including a mold apparatus of a centrifugal caster according to the present invention;

Figure 2 is a front configuration diagram showing a mold apparatus of the centrifugal casting machine according to the present invention,

3 is a plan view showing the mold apparatus of the centrifugal casting machine according to the present invention;

4 is a detail view of a portion “A” of FIG. 2.

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

1: melting furnace 2: molten metal injection device

3: centrifugal casting apparatus 4: mold

4A: Upper type 4B: Lower type

5: mold table 6: thread take-out / conveyer

7 Weighing Device 9 Deburring Device

12 conveyor 13 seal cooling device

15: finishing machine 17: grinding machine

19: thread washing unit 20: lapping machine

23 conveyor 31 base

41: mold base 42: rotating shaft

43, 46: gear 45: mold rotation motor

51: index motor 61: upper separation mechanism

62: clamp mechanism 63: vertical feed mechanism

64: hydraulic cylinder 65: clamp feed mechanism

66: clamp mechanism 67: temperature sensor

68: horizontal feed mechanism 69: mounting bracket

Claims (3)

A mold table which is rotationally driven at an angle by the index motor; A plurality of mold bases disposed at equal intervals along the circumference of the mold table; At least one mold rotation motor installed to rotationally drive at least one mold base moved to a predetermined position among the plurality of mold bases; An upper mold separating mechanism disposed at a product taking-out position of the mold table to separate and move the upper mold of the mold from the lower mold after the production of the product; And The apparatus of claim 1, further comprising: a temperature sensor configured to be disposed on the upper mold separation mechanism to sense the temperature of the mold before the molten metal is injected into the mold. The method according to claim 1, The temperature sensor is a mold apparatus of the centrifugal caster is disposed in the upper mold separation mechanism adjacent to the outside from one side of the mold. The method according to claim 1 or 2, The temperature sensor is a mold apparatus of the centrifugal casting machine which is an infrared sensor.

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