KR20030091906A - core and die for casting the core and die for casting the housing of car thermostat - Google Patents

Abstract

PURPOSE: A core for use in the casting of a housing for a car thermostat, a core mold, and a housing casting mold are provided to secure uniform and quite injection of foundries. CONSTITUTION: In a mold for use in the manufacture of a thermostat housing, it comprises a lower mold formed with a sprue, a runner, and a riser, an upper mold formed with the sprue, runner and riser corresponding to those of the lower mold, a first core having a thermostat inner shape defining portion, and a second core coming into contact with the distal ends of the thermostat inner shape defining portion.

Description

Core and die for casting the core and die for casting the housing of car thermostat}

The present invention relates to a core, a core mold, and a mold of a housing for manufacturing a thermostat housing, and more particularly, each of the mold spaces is formed on the left and right sides, and each inlet of the mold space is formed perpendicular to the direction of casting of the casting hole. The present invention relates to a core, a core mold, and a mold of a housing for manufacturing a thermostat housing.

Since the internal combustion engine generates heat during operation, the internal combustion engine is provided with cooling means to prevent overheating and damage. In general, the cooling means used in automobiles is to use the cooling water. At this time, if the temperature of the coolant is out of a predetermined range, the operating state of the engine may be deteriorated or the engine may be damaged. Therefore, a means for maintaining the temperature of the coolant is required. For this purpose, a thermostat is installed in the pipeline through which the coolant flows. When the temperature of the coolant is low, the thermostat blocks the flow of the coolant to raise the coolant temperature around the engine, and when the temperature is high, the coolant flows smoothly to lower the coolant temperature around the engine. Since the housing of the thermostat is supplied with a pipe through which the coolant flows and a device for opening and closing the pipe, the core is used when the inside of the thermostat is empty to manufacture a casting.

Conventionally, a mold as shown in FIG. 2 is used to cast the thermostat housing. The mold is provided with two spouts on the front side, and the mold space is positioned at the end of the spout, and two cores are used inside the mold space. Since the inlet of the mold space is located in the direction of travel and the extension line of the casting in the molten metal, the molten metal enters the mold space directly through the molten metal.

Accordingly, there is a problem in that the casting cannot be quietly and uniformly injected into the mold space, so that there is a high possibility of producing a defective product in which leakage occurs at the bent portion. In addition, since one product is produced by one mold, there is a problem in that productivity takes a long time when mass production takes place. In addition, there is a problem that it is not economical to use two cores for one product.

In order to solve the above problems, the casting is quietly uniformly injected into the mold space and the defect rate is low, and the object of the present invention is to provide a thermostat manufacturing mold having high productivity by producing two products by one casting. . Another aim is to provide molds that can reduce costs by reducing core usage.

1 is a plan view of a core forming mold of a conventional automotive thermostat

2 is a plan view of a mold for casting a conventional automotive thermostat housing

Figure 3 is a perspective view of a first core for housing casting of the automotive thermostat according to an embodiment of the present invention

4 is a plan view of a mold for manufacturing a first core according to an embodiment of the present invention.

5 is a view showing the state of the cylinder and the inclined pin installed in the mold for the first core.

Figure 6 is a perspective view of the second core according to an embodiment of the present invention

7 is a plan view of a mold for manufacturing a second core according to an embodiment of the present invention.

8 is a plan view of a lower mold for housing casting of a automotive thermostat according to an embodiment of the present invention.

9 is a sectional view of a casting die.

The present invention is the first core 10 used for the housing casting of the thermostat to control the flow and temperature of the vehicle cooling water to achieve the above object, 'T' shaped guide portion 11; The first core 10 for casting the thermostat housing, including a hole formed therein; is coupled to both ends of the guide portion 11, each of the shape portion 12 to form an internal shape of the thermostat; Technical features are made.

Two mold spaces formed of two molds left and right and forming the shape of the first core 10 are symmetrically disposed between the molds, connected to an outside air pump and each of the shape portions 12 of the mold space. An air inlet 21 extending to an end and serving as a passage through which high pressure air is injected into the mold space; An air outlet port 22 extending outwardly from the guide part 11 to discharge air injected into the mold space through the air injection port 21; An inclined pin 23 installed at a distance from a distal end of the shape part 12 in one mold of the two molds and protruding inclined outwardly; It is installed to be moved back and forth on both sides of the mold space of the other mold, are located on both sides of the mold space and the shape of one side of the shape portion 12 of the first core 10 is formed on the mold space side, inclined to one side The through-hole is formed to form a cylinder 24, the inclined pin 23 is inserted; and the mold for manufacturing the first core 10 is configured as another technical feature.

And a conduit part 31 forming a coolant conduit shape inside the housing. The second core for casting the thermostat housing is formed, including; and the guide 32 extending from both ends of the pipe shape and one side protrudes outward, the through-hole is formed in another technical feature.

And it consists of two molds left and right two mold spaces having the shape of the second core is arranged side by side, connecting the inlet for injecting air from one end of each mold space and for discharging air to the other end Another technical feature is a mold for manufacturing a second core that connects the outlet.

In addition, in the housing manufacturing mold of the thermostat which controls the flow and temperature of the vehicle cooling water, a lower injection cup 41 is provided on the front side, and is connected to the lower injection cup 41 to extend to the center of the water supply 42 ) Is formed, and the ends of the tangles 42 are separated to form the troughs 44, and the inlet of the mold space is formed at each trough 44 perpendicular to the direction of casting of the casting troughs, respectively. A mold space of which is formed, and the front end of the mold space is formed with a pressurized 45 in the front side direction, and the rear end has a lower mold 40 formed with the pressurized 45 in an outward direction; An upper mold 50 corresponding to the lower mold, wherein an upper mold 50, a pouring tool 44, a mold space, and a pressure bath 45 are formed; A first core 10 of claim 1 positioned between the mold spaces formed on the left and right sides and having a shape portion 12 inserted into the mold space; And the second core 30 of claim 3, which is in contact with the end of the shape portion 12 of the first core 10 and is positioned in the mold space formed on the left and right sides, respectively. The casting mold apparatus of the start housing is another technical feature.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

First, the first core 10 will be described.

The first core 10 is a 'T' shaped guide portion 11 for holding an appropriate position in the mold and the shape portion 12 which is installed at both ends of the guide portion 11 and forms a shape inside the housing. It is composed of As described above, the shape parts 12 are provided at both ends of the guide part 11, so that two housings can be cast with one first core 10. As shown in FIG. 3, the shape part 12 has a cylindrical shape bent twice, and a hole is formed at an end thereof. The through hole extends along the inside of the shape part 12 on both sides, and meets at the guide part 11 to be connected to the lower end of the guide part 11. The through hole is to allow the gas generated during casting to be easily discharged to be a gas passage to increase the quality of the product.

The first core 10 is manufactured by using a mold for manufacturing the first core 10. The first core 10 production die is made of two molds left and right. In each mold, a mold space is formed in the shape of the first core 10. In the first core 10 manufacturing mold of the present invention, the mold space is symmetrical and two are formed. Accordingly, it is possible to manufacture two first cores 10 in one operation. An air inlet 21 is formed at the end of each shape part 12 to be connected to an external pump to inject high pressure air into the mold space. Air injected into the mold space is discharged to the air outlet 22 formed in the guide portion 11 side. Therefore, when the high-pressure air is injected after the material is injected into the mold, the air is discharged from the air inlet 21 at the end of the shape part 12 to the air outlet 22 at the guide side, thereby forming a through hole therein.

Since the first core 10 of the present invention partially protrudes below the distal end of the shaped portion 12, it may be difficult to separate the first core 10 by using only the left and right molds. Therefore, the cylinder 24 that is movable back and forth in the mold is installed to move forward during the work to form the protruding part, and when the separation is performed, the cylinder 24 is retracted so that the first core 10 can be easily separated. . Conventionally, the cylinder is operated using an air cylinder or the like as shown in FIG. However, in the present invention, since four cylinders are used, the cylinder 24 having the inclined through-hole formed on one side of the cylinder 24 is installed to be moved back and forth, and the other side of the mold is provided with the inclined pin 23 inclined outward. Since the inclined pin 23 is inserted into the inclined through hole of the cylinder 24, when the mold is closed, the cylinder 24 moves inward along the inclined pin 23, and the inclined pin 23 is inclined. It moves outward along the pin 23. Accordingly, the first core 10 can be easily manufactured.

Next, the second core will be described. The second core forms a cooling water pipe shape of the thermostat, and both ends thereof extend to form a guide 32 for accurately positioning the inside of a mold for manufacturing a housing. In addition, the inside of the second core is formed through the same hole as the first core 10 is configured to easily discharge the gas to the outside during casting.

The mold for manufacturing the second core is arranged side by side with the mold space of the second core shape and to form an inlet and outlet for injecting air into the distal end of the mold space to form a through-hole in the second core Done.

Next, the mold apparatus for manufacturing a housing will be described. According to the drawing, it can be seen that the mold apparatus includes a lower mold 40, an upper mold 50, a first core 10, and a second core 30.

First, the lower mold will be described. The lower mold has a lower injection cup 41 formed on the front side. The lower injection cup 41 is formed in the center concave and the mold side is formed with a groove for the casting flow. When the casting injected from the upper side enters the lower injection cup 41, the lower injection cup 41 fills the inside, and then gradually flows into the mold 42 in the mold along the groove. The water supply 42 is a main passage through which the casting flows in the mold, so that the casting flows horizontally on the surface of the mold. The water supply 42 is divided from side to side in the mold to form a water hole 44. At this time, the runway 42 is continuously extended to the rear side of the mold to form a runway extension 43.

In addition, the inlet of the mold space is connected to the mouthpiece 44 perpendicular to the direction in which the casting flows in the mouthpiece 44. Forming the inlet of the mold space vertically as described above is to prevent the injected casting flows directly into the mold space to be quietly and uniformly filled in the mold space.

The left and right mold spaces are formed with a pressurizer 45 at the front end, respectively, and a pressurizer 45 at the rear side, in the outward direction.

In addition, the lower mold is formed with a plurality of guide grooves 46 for accurately positioning the core in the mold space.

The upper mold is located on the upper side of the lower mold and corresponding to the lower mold in the lower surface 42 and the pouring groove 44, the mold space, the hot water 45 is installed, so detailed description thereof will be omitted. do.

Next, the first core 10 will be described. The first core 10 is located between the mold spaces on the left and right sides formed in the mold, and the left and right shape portions 12 extend inwardly from the inlet side of each mold space through the center of the runway 42. The guide portion 11 is moved to the rear side of the mold. The center of the first core 10 is protruded and coupled to the guide groove 46 in the mold to be positioned.

Next, the second core will be described. The second core is located in the mold space in the mold and the center thereof is in contact with the end of the first core 10. The second core forms a pipeline through which cooling water flows. In this embodiment, one side forms a straight line, the other side forms a curve, and each end extends in one side direction. The end of the extended portion is protruded so that the second core is coupled to the guide groove 46 formed in the upper and lower molds to be accurately positioned in the mold. Since the mold space is formed in each of the left and right sides of the mold, two second cores are used in one mold. In this case, since the directions of the left and right mold spaces are reversed, the directions of the left and right second cores are also reversed.

Hereinafter will be described the operation of the mold for manufacturing the automotive thermostat according to an embodiment of the present invention.

First, the first core 10 manufacturing die is combined. Accordingly, the inclined pin 23 is inserted into the through-hole of the cylinder 24, and the two molds are combined to move the cylinder 24 along the inclination of the inclined pin 23, thereby advancing toward the mold space. Thereafter, after inserting the material, high-pressure air is blown through the air inlet 21 to form a through hole inside the material. After the mold is separated, the cylinder 24 is retracted to easily separate the first core 10 from the mold.

Next, after combining the mold for manufacturing the second core and injecting the material, the air is blown to produce a second core having a hole formed therein.

In order to manufacture the housing, the second cores are installed on the left and right sides of the mold space, and then the first core 10 is installed between the mold spaces. The molten aluminum is injected from the upper side of the lower injection cup 41 after the upper mold is combined with the lower mold. The injected aluminum casting is injected into the mold along the groove formed in the mold side after filling the lower injection cup 41. Castings horizontally moved to the mold surface along the tap road 42 are split into left and right sides and flow into the tap hole 44. The casting fills the extension of the pouring hole 44 and the pouring hole 44 and gradually flows into the inlet side of the mold space positioned perpendicular to the pouring hole 44. The casting continues to flow along the mold space to reach the pressure baths 45 formed at the front and rear ends, respectively. When the casting that completely fills the mold space is cooled and solidified, the upper mold is separated, the casting solidified therein is separated from the mold, and then cut and surface treated to complete the product.

As described above, according to the mold for manufacturing a housing of the automotive thermostat of the present invention, the casting is uniformly injected into the mold space to lower the defect rate of the product, and two casting spaces are formed in one mold, and three cores are used. Two products can be obtained from the conference casting, which increases productivity and is economical.

Claims (5)

In the first core 10 used for the casting of the housing of the thermostat, which controls the flow and temperature of the vehicle cooling water, A 'T' shaped guide part 11; The first core for casting thermostat housing, characterized in that it is coupled to the both ends of the guide portion 11 and forms the internal shape of the thermostat 12; . It consists of two molds left and right two mold spaces forming the shape of the first core 10 between the molds are arranged symmetrically, An air inlet 21 connected to an outside air pump and extending to each end of the shape part 12 of the mold space to be a passage through which high-pressure air is injected into the mold space; An air outlet port 22 extending outwardly from the guide part 11 to discharge air injected into the mold space through the air injection port 21; An inclined pin 23 installed at a distance from a distal end of the shape part 12 in one mold of the two molds and protruding inclined outwardly; It is installed to be moved back and forth on both sides of the mold space of the other mold, are located on both sides of the mold space and the shape of one side of the shape portion 12 of the first core 10 is formed on the mold space side, inclined to one side The through-hole is formed to form a cylinder 24 is inserted into the inclined pin 23; Mold for manufacturing the first core, characterized in that it comprises a. A conduit part 31 forming a coolant conduit shape in the housing; The second core for casting the thermostat housing, comprising a guide portion 32 extending from both ends of the conduit shape and one side protruding outward. It consists of two molds left and right two mold spaces having the shape of the second core 30 are arranged side by side, connecting the inlet 31 for injecting air from one end of each mold space and the other end The second core manufacturing mold, characterized in that for connecting the outlet 32 for discharging air. In the housing manufacturing mold of the thermostat which controls the flow and temperature of the automotive cooling water, A lower injection cup 41 is provided on the front side, and is connected to the lower injection cup 41 and extends to the center to form a runway 42, and the end of the runway 42 is separated to form a pouring hole 44. The inlet of the mold space is formed in each of the spouts 44 perpendicular to the direction of the casting, so that each mold space is formed on the left and right sides, and the front end of the mold space is pressurized in the front direction 45. It is formed and the rear end of the lower mold 40 is formed with a pressure 45 in the outward direction; An upper mold 50 corresponding to the lower mold, wherein an upper mold 50, a pouring tool 44, a mold space, and a pressure bath 45 are formed; A first core of claim 1 positioned between the mold spaces formed on the left and right sides and having a shape portion 12 inserted into the mold space; The second core of claim 3, which is in contact with an end of the shape part 12 of the first core 10 and is positioned in a mold space formed on the left and right sides of the first core 10. Mold for casting.