JPH0442052Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a cooling device for castings used in the casting industry.

BACKGROUND ART Conventionally, although not shown in the drawings, this type of device cools castings while being transported by a conveyor, a hanger conveyor, an apron conveyor, or the like.

Problems that the invention aims to solve However, the devices using the various conveyors mentioned above are
It has the following drawbacks. The problem is that when a cast product changes, it is not possible to easily determine the temperature drop versus cooling curve for that product over time.

This is because the cast product to be cast may be changed, and in this case, the mass, wall thickness, surface area, etc. of the cast product may change. In such cases, the cooling time and the temperature drop curve for the same time should be determined by the mass of the casting product,
The curve should be changed taking into consideration wall thickness, surface area, etc., but conventionally it has not been possible to change the curve easily.

The purpose of this invention is to solve the above problems.

Means for Solving the Problems This invention that achieves each of the above objects is described as follows: a cooling zone 1 shaped like a tunnel furnace and formed by accommodating a casting conveying device 2; A hot air supply device 5 provided in communication between the upstream end 7 and the melting furnace 6;
A plurality of divided zones 9; A cooling unit 1a provided in each divided zone 9 and having the same configuration as follows; A cold air supply device 10 having a cold air supply amount adjustment device 14; A hot air discharge amount adjustment device 15 a hot air discharge device 11 having a hot air discharge device 11; an automatically operating temperature regulating device 16 connected to the supply rate regulating device 14 and the discharge rate regulating device 15 and consisting of the following components; setting the temperature in the divided zone 9; a temperature setting device 19 that detects the temperature within the divided zone 9 provided in the temperature setting device 19; a comparison circuit 1 that compares the set value of the temperature setting device 19 and the value of the temperature sensor 17;
8; Control circuit 2 sequentially connected to the comparison circuit 18
This is a cooling device for a cast product, which includes a cooling unit 1a consisting of a cooling unit 1a and a drive device 21.

Operation The casting product is placed on the conveying device 2, enters the cooling zone 1, and is passed through each dividing zone 9 one after another. The internal temperature of the divided zone 9 is adjusted so that the temperature becomes lower from upstream to downstream. This adjustment is performed by automatically adjusting the cold air supply device 10 and hot air discharge device 11 formed in the divided zone 9.

The product, whose temperature is lowered each time it passes through each division zone 9, is lowered to the desired temperature, reaches the outlet of the cooling zone 1, and is taken out. Each temperature control device 16 in each of the divided zones 9 has a curve of temperature decrease with respect to elapsed time set appropriately, taking into account the mass, wall thickness, surface area, etc. of the cast product, so that it is the most suitable for the cast product. By cooling with a specific cooling curve, it is possible to effectively obtain a cast product with good workability and excellent removal of residual stress.

Embodiment In FIGS. 1 and 2, reference numeral 1 denotes a cooling zone formed in the shape of a tunnel furnace, and a conveying device 2 is provided inside the cooling zone. The device 2 is, for example, a mesh metal belt conveyor, 3 is a driving roller, 4 is a driven roller, and the conveyor is formed in an endless shape. A hot air supply device 5 communicates with the melting furnace 6 and with the upstream end 7 of the cooling zone 1 . A duct 8 is provided with a fan (not shown) inside.

Next, 9 is a division zone, which is formed by six division zones 9 as an example. Each divided zone 9 is provided with a cold air supply device 10 and a hot air discharge device 11, respectively. Reference numerals 12 and 13 represent fans, and 14 and 15 represent a cold air supply amount adjustment device and a hot air discharge amount adjustment device, respectively. 1
6 is a temperature control device that operates automatically, and is connected to a cold air supply device 10 and a hot air exhaust device 11;
Temperature sensor 17, comparison circuit 18, temperature setting device 1
9, a control circuit 20, and a drive device 20a, the temperature within the divided zone 9 can be set and automatically adjusted. For example, the temperature in the divided zone 9 is detected by the temperature sensor 17, and if the temperature is different from the temperature preset by the temperature setting device 19, the cold air supply device 10 or the hot air exhaust device 11 is driven, The temperature within the divided zone 9 is always maintained at a set temperature by adjusting the air volume. This is Juan 12, 13
This is done by adjusting the speed of the motor, the supply amount adjusting device 14, the discharge amount adjusting device 15, etc. Note that the cold air in the cold air supply device 10 means a flow of air at room temperature. The temperature within each divided zone 9 is set stepwise so that it becomes lower from the upstream side to the downstream side.

In this device, as an example, the temperature was set at 300°C to 900°C in the most upstream dividing zone 9, and 300°C to 400°C in the most downstream dividing zone 9. Note that 20 is a fan provided in each divided zone 9, so that the temperature in the zone 9 is kept almost constant.

21 indicates a cast product.

The total length of cooling zone 1 above is an example.
The product 21 passes through the cooling zone 1 in about 20 to 50 minutes. This means that the passing time varies depending on the size of the product, and the conveyance device 2 is equipped with a speed control device (not shown).
You can change gears as you like. Generally speaking, cooling of cast products is
Ideally, this should be done at a rate of about 0.4℃/sec.
This device also operates at such speeds.

Next, 22 in the figure is a heat exchanger, which is communicated with each hot air discharge device 11 of the divided zone 9 through a duct 23, and is configured to heat water, for example. This allows the exhaust heat from the cooling zone to be used effectively. In addition, each temperature control device 1
6 is shown above the cooling zone for easy understanding, but it is actually preferable to separate it from the cooling zone 1 and provide it together on a control panel (not shown).

Effects of the invention This invention is constructed as described above, in which the same cooling unit 1a is provided in each of the plurality of cooling zones 9 formed to have approximately equal lengths, and the temperature of the cooling zone 9 is set in each of the cooling units 1a. a temperature setting device 16 that detects the temperature of the cooling zone 9; and a temperature sensor 1 that detects the temperature of the cooling zone 9.
A comparison circuit 18 is provided to compare the set value of the temperature setting device 16 and the detected value of the temperature sensor 17.
0. By providing a drive device 21 and connecting a cold air supply amount adjustment device 14 and a hot air discharge amount adjustment device 15 to this drive device 21, it is possible to find the most suitable one according to the mass, wall thickness, surface area, etc. of the cast product. In addition, it is possible to extremely easily set a curve of temperature decrease with respect to elapsed time, that is, a cooling curve. Therefore, when changing a cast product, cooling can be easily performed using a cooling curve suitable for the product, and a cast product with good machinability and excellent removal of residual stress can be efficiently obtained.

This effect makes it possible to change the cooling curve very easily, particularly in the case of multi-product production, that is, work involving a large number of lots, thereby facilitating the above-mentioned production.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a schematic diagram of a cooling device for a cast product, and FIG. 2 is a block diagram showing details of a part of FIG. 1. 1... Cooling zone, 1a... Cooling unit, 2... Transfer device, 9... Division zone,
10...Cold air supply device, 11...Hot air discharge device,
14...Cold air supply amount adjustment device, 15...Hot air discharge amount adjustment device, 16...Temperature adjustment device, 17...
... Temperature sensor, 18 ... Comparison circuit, 19 ... Temperature setting device, 20 ... Control circuit, 21 ... Drive device.

Claims (1)

[Scope of utility model registration request] a cooling zone 1 having a substantially tunnel furnace shape and formed by accommodating a casting conveying device 2; a hot air supply device 5 provided to communicate the upstream end 7 of the cooling zone 1 with the melting furnace 6; A plurality of divided zones 9 of approximately equal length formed in the cooling zone 1; A cooling unit 1a provided in each of the divided zones 9 and having the same structure as follows; A cooling air supply amount adjustment device 14; a cold air supply device 10 having; a hot air discharge device 11 having a hot air discharge rate regulating device 15; an automatically activated temperature control device connected to the supply rate regulating device 14 and the discharge rate regulating device 15, respectively, and consisting of the following components: Adjustment device 16; Temperature setting device 19 for setting the temperature in the divided zone 9; Temperature sensor 17 provided in the temperature setting device 19 to detect the temperature in the divided zone 9; Set value of the temperature setting device 19. The cooling unit 1 comprises: a comparison circuit 18 for comparing the value of the temperature sensor 17; a control circuit 20 and a drive device 21 connected in sequence to the comparison circuit 18;
A casting product cooling device comprising: a;