KR20220112129A - Design of outer mating faces when making medium molds - Google Patents

Abstract

The present invention relates to a mold apparatus for manufacturing a core used when producing inner and outer concave-convex cooling channels of an electric vehicle motor housing. In the present invention, a new type of molding apparatus is implemented to manufacture inner and outer concave-convex cooling channel cores by appropriately moving four side molds having an outer concave-convex structure and four inserts having an inner concave-convex structure back and forth when manufacturing the inner and outer concave-convex cooling channel cores used in the electric vehicle motor housing. The provided mold apparatus for manufacturing the concave-convex cooling channel core secures mass productivity related to cooling channel core production.

Description

Design of outer joint surface when manufacturing a core mold {DESIGN OF OUTER MATING FACES WHEN MAKING MEDIUM MOLDS}

The present invention relates to a mold device for manufacturing a concave-convex cooling channel core, and more particularly, to a mold device for manufacturing a core used when making internal and external concavo-convex cooling channels of an electric vehicle motor housing.

In general, the motor of a water-cooled electric vehicle can maximize the output performance by effectively configuring the cooling channel in the housing.

In general, the design concept of maximizing cooling performance is applied to the motor housing by configuring internal and external concavo-convex cooling channels.

However, when the cooling channel is manufactured as a core, it is a disadvantage that a large number of divided wooden dies, for example, about 15 divided wooden dies, are required due to the inner concave-convex structure.

Therefore, there is a need for a method of manufacturing an effective cooling channel core for securing mass productivity.

The cooling channel of the conventional motor housing, which is currently mass-produced, consists of three channels of internal and external private sector structure.

This structure has disadvantages such as a small channel cross-sectional area and a large pressure loss due to abrupt shape change. Accordingly, recently, a cooling channel for an electric vehicle motor housing that can increase the channel cross-sectional area through the internal and external concavo-convex structure and reduce the pressure loss through the "U"-shaped loop has been proposed.

However, in order to manufacture the inner and outer concave-convex cooling channels with excellent cooling performance as a core, dozens of split wooden die are required, because the inner concavo-convex structure cannot be implemented with a single mold.

Accordingly, the method of manufacturing a core of a cooling channel having an internal and external concavo-convex structure using such several tens of split wooden molds has disadvantages in terms of mass productivity.

Therefore, the present invention has been devised in consideration of this point, and when manufacturing the core of an internal and external concave-convex cooling channel that enters the motor housing of an electric vehicle, four side molds having an external concave-convex structure and four inserts having an internal concave-convex structure are used. A mold for manufacturing a concave-convex cooling channel core that can secure mass productivity related to the production of cooling channel cores by realizing a new type of mold device that manufactures internal and external concave-convex cooling channel cores in a way that moves forward and backward appropriately The purpose is to provide a device.

In order to achieve the above object, the mold apparatus for manufacturing the concave-convex cooling channel core provided by the present invention has the following characteristics.

The mold device for manufacturing the concave-convex cooling channel core includes a movable upper mold and a fixed lower mold, and is disposed on the upper part of the lower mold to move forward and backward toward the center and the outside. A plurality of side molds for forming the outer concavo-convex surface of the core through a plurality of side molds, and concentrically arranged inside the side mold to move forward and backward toward the center and the outer side, and to create the inner concave-convex surface of the core through each outer circumferential surface It has a structure including a plurality of inserts and an actuator for operating the inserts.

Therefore, the mold device for manufacturing the concave-convex cooling channel core can effectively manufacture the cooling channel core having the concave-convex structure inside and outside by using the forward and backward operations of a plurality of side molds and inserts and the vertical operation of the upper mold. There is a characteristic.

Here, the insert of the mold device for manufacturing the concave-convex cooling channel core is composed of first to fourth inserts having a four-part structure, and when they are combined, the outer periphery is arranged to form a circle as a whole, and opposite to each other It is preferable that the disposed first insert and the second insert are capable of moving forward and backward in the X-axis direction, while the third and fourth inserts are configured to be capable of moving forward and backward in the Y-axis direction. At this time, in the case of the first insert and the second insert of the insert, it may include at least two recesses formed on the inner surfaces facing each other and fitted with the convex portions on the side surfaces of the core mold of the upper mold, and the third insert and In the case of the fourth insert, inner surfaces facing each other may be formed of a flat portion in contact with the front and rear surfaces of the core mold in the upper mold.

And, when the product is taken out from the mold device, the third and fourth inserts move forward toward the center and move to a line between both recesses of the first and second inserts so that they are positioned, and the first insert and the second insert are moved forward toward the center while accommodating the third and fourth inserts in the recesses of both sides, so that it is preferable to exclude interference during product extraction.

The mold apparatus for manufacturing the concave-convex cooling channel core provided by the present invention has the following advantages.

First, the internal and external concavo-convex cooling channels with maximized cooling performance can be effectively manufactured with a mass-production mold.

Second, the mass productivity of the core mold can be improved by eliminating the complicated split die.

Third, it is possible to secure the quality of the inner and outer concave-convex cold channel cores.

1 is a plan view showing a mold apparatus for manufacturing a concave-convex cooling channel core according to an embodiment of the present invention;
2 is a front view showing a mold apparatus for manufacturing a concave-convex cooling channel core according to an embodiment of the present invention;
3 is a plan view showing a reversed state of the side mold in the mold apparatus for manufacturing the concave-convex cooling channel core according to an embodiment of the present invention;
4 is a plan view illustrating an insert and an actuator in a mold apparatus for manufacturing a concave-convex cooling channel core according to an embodiment of the present invention;
5 is a schematic diagram showing the arrangement relationship between the insert and the upper and lower molds in the mold apparatus for manufacturing the concave-convex cooling channel core according to an embodiment of the present invention;
6a to 6i are schematic views showing the operation sequence of the mold apparatus for manufacturing the concave-convex cooling channel core according to an embodiment of the present invention;

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view showing a mold apparatus for manufacturing a concave-convex cooling channel core according to an embodiment of the present invention, and FIG. 2 is a front view showing a mold apparatus for manufacturing a concave-convex cooling channel core according to an embodiment of the present invention. to be.

As shown in FIGS. 1 and 2, the mold apparatus for manufacturing the concave-convex cooling channel core forms a cooling channel core having a concave-convex structure inside and outside while moving forward and backward in the X-axis direction and the Y-axis direction. It includes two divided inserts and a side mold, and has a structure that can efficiently manufacture a cooling channel core having an internal and external concavo-convex structure by using an insert and a side mold having such a divided structure and motion characteristics.

To this end, a movable upper mold 10 and a fixed lower mold 11 arranged up and down in the press facility are provided, and the upper mold 10 at this time has a core mold located inside the insert 13 to be described later. (15) is provided.

Here, two convex portions 16 are formed on both sides of the core mold 15, respectively, and the convex portions 16 are the first insert 13a and the second insert (13a) constituting the insert 13 ( 13b) can be mated with the recess 16. Accordingly, when the core mold 15 of the upper mold 10 fits snugly into the space formed inside the insert 13 in a state in which the insert 13 is seated, the inside of the insert 13 can be supported as a whole. there will be

In addition, a plurality of side molds 12, for example, side molds 12 having a four-division structure are provided as means for forming the external concavo-convex structure of the cooling channel core.

That is, the side mold 12 is a combination type of the first side mold 12a to the fourth side mold 12d forming a four-division structure at intervals of 90°, and the inner peripheral surface of each side mold has a cooling channel core. External concavo-convex surfaces 19 corresponding to the external concavo-convex structure are respectively formed.

Accordingly, when the first side mold 12a to the fourth side mold 12d are gathered toward the center, the four external concavo-convex surfaces 19 of each side mold form a circle while forming the external concavo-convex structure of the cooling channel core. It is possible to create an outer cavity surface for

The first side mold 12a to the fourth side mold 12d are disposed on the upper part of the lower mold 11 and installed to move forward and backward toward the center and the outside while moving along the X-axis and Y-axis directions. do.

Here, the means for moving the first side mold 12a to the fourth side mold 12d forward and backward may be a slider provided in a general press equipment, and a detailed description thereof will be omitted.

The state in which the four-split side mold 12 is opened, that is, each of the first side mold 12a to the fourth side mold 12d is positioned by moving backward to the outside, is well illustrated in FIG. 3 .

In particular, a plurality of inserts 13 as a means for forming the internal concavo-convex structure of the cooling channel core, for example, an insert 13 composed of a combination type of the first insert 13a to the fourth insert 13d having a four-part structure. is prepared

At this time, the first insert (13a) to the fourth insert (13d) are arranged at intervals of 90° while being doubled to the positions of the first side mold (12a) to the fourth side mold (12d) one by one, and the outer peripheral surface of each insert The inner concave-convex surface 18 corresponding to the inner concave-convex structure of the cooling channel core is formed, respectively.

Accordingly, when the first inserts 13a to 13d are assembled together, the four inner concave-convex surfaces 18 of each insert form a circle, and the inner side for forming the inner concave-convex structure of the cooling channel core A cavity surface can be formed.

These first inserts (13a) to fourth inserts (13d) are arranged concentrically on the inside of the side mold 12 and move along the X-axis and Y-axis directions to move forward and backward toward the center and the outside. to be installed

That is, as shown in FIG. 4, the first insert 13a and the second insert 13b are disposed to face each other along the X-axis line and are installed so as to move forward and backward toward the center and the outside, and the third insert ( 13c) and the fourth insert 13d are installed so as to face each other along the Y-axis and move forward and backward toward the center and the outside.

At this time, as means for the operation of the first insert 13a to the fourth insert 13d, an actuator 14 disposed one by one on each insert side, for example, an actuator 14 such as a cylinder, is provided, and at this time The cylinder is supported on the lower mold 11 and has a structure connected to the bottom side of each insert through the rod.

Here, as the means for moving the insert, an internal slider using a spring applied to a conventional mold apparatus may be applied.

Accordingly, by the operation of the respective actuators 14, the first inserts 13a to the fourth inserts 13d are gathered toward the center (when taking out the product) and then moved to the outer side to take a seat while forming a side mold on the outside. It becomes possible to form a cavity with the side (when molding a product)

5 is a schematic diagram showing the arrangement relationship between the insert and the upper and lower molds in the mold apparatus for manufacturing the concave-convex cooling channel core according to an embodiment of the present invention.

As shown in FIG. 5 , when the first inserts 13a to 13d of the four-division structure constituting the insert 13 are combined backwards toward the outside, the outside of the insert 13 forms a circle as a whole.

In addition, the first insert 13a and the second insert 13b disposed opposite to each other are disposed opposite to each other in the X-axis direction, and the third insert 13c and the fourth insert are disposed opposite to each other in a direction forming 90° therewith. (13d) enables forward and backward movement in the Y-axis direction, respectively. At this time, the first insert 13a and the second insert 13b have two recessed portions to be fitted with the convex portion 16 on the side of the core mold 15 of the upper mold 10 on each inner surface facing each other. (17) is respectively formed.

In addition, the third insert 13c and the fourth insert 13d may be formed of a flat portion 20 whose inner surfaces facing each other are in contact with the front and rear surfaces of the core mold 15 in the upper mold 10 . .

Accordingly, the first insert (13a) to the fourth insert (13d) are in contact with the outer periphery of the core mold 15 through the concave portion 17 and the flat portion 20 of each inner surface while forming a core. combination can be achieved for

In particular, the first insert 13a to the fourth insert 13d exhibit operational characteristics that do not interfere with the product while efficiently retreating when the product is taken out by utilizing the structural characteristics of each other.

To this end, in a state in which the core mold 15 is pulled out, the third insert 13c and the fourth insert 13d move forward toward the center and are provided in the first insert 13a and the second insert 13b. It moves to the line between the both recessed parts 17.

Subsequently, the first insert 13a and the second insert 13b move forward toward the center with the third insert 13c and the fourth insert 13d positioned in the recesses 17 of both sides.

Accordingly, the first insert 13a to the fourth insert 14d can be in a state of receding toward the center of the inner region of the product while maintaining the minimum size, and consequently do not cause interference when taking out the product.

Therefore, the operating state of the mold apparatus for manufacturing the concave-convex cooling channel core configured as described above is as follows.

6A to 6I are schematic diagrams illustrating an operation sequence of a mold apparatus for manufacturing a core of a concave-convex cooling channel according to an embodiment of the present invention.

As shown in FIGS. 6A to 6I , the insert 13 disposed in the central region of the mold apparatus is moved backward to the outside and disposed in a circular shape.

Next, the side mold 12 disposed on the periphery of the insert 13 is advanced toward the center to form a predetermined cavity together with the insert 13 inside.

Next, the upper mold 10 is lowered to raise the upper mold 10 after blowing in a state where the core mold 15 is disposed in the inner space of the insert 13 .

Next, after the third insert 13c and the fourth insert 13d of the insert 13 are advanced to the center, the first insert 13a and the second insert 13b are continuously advanced to the center.

Next, when the product is taken out after the side mold 12 is moved backward to the outside, the manufacturing process of the inner and outer concave-convex cooling channel core 120 is completed.

Explanation of symbols
10: upper mold 11: lower mold
12: side mold 12a: first side mold
12b: second side mold 12c: third side mold
14d: fourth side mold 13: insert
13a: first insert 13b: second insert
13c: 3rd insert 13d: 4th insert
14: actuator 15: core mold
16: iron part 17: waist part
18: internal uneven surface 19: external uneven surface
20: flat part

Claims (5)

a movable upper mold 10 and a fixed lower mold 11;
a plurality of side molds (12) disposed on the upper part of the lower mold (11), capable of moving forward and backward toward the center and outward, and forming an outer concave-convex surface of the core through each inner peripheral surface while being combined together;
A plurality of inserts 13 and the inserts 13, which are arranged concentrically inside the side mold 12, move forward and backward toward the center and the outer side, and form an inner concave-convex surface of the core through each outer circumferential surface. Actuator 14 for operating the;
Including, by using the forward and backward operations of the plurality of side molds 12 and the insert 13 and the vertical operation of the upper mold 10, a cooling channel core having a concave-convex structure inside and outside can be manufactured A mold device for manufacturing a concave-convex cooling channel core. The method according to claim 1,
The insert 13 is composed of a first insert 13a to a fourth insert 13d having a four-part structure, and when they are combined, the outer circumference of the insert 13 is arranged to form a circle as a whole, and the first inserts arranged opposite to each other Concave-convex cooling, characterized in that the insert (13a) and the second insert (13b) can be moved forward and backward in the X-axis direction, while the third insert (13c) and the fourth insert (13d) can be moved forward and backward in the Y-axis direction Mold device for channel core production. The method according to claim 1 or 2,
The first insert 13a and the second insert 13b of the insert 13 are formed on the inner surfaces facing each other and are fitted with the convex portion 16 on the side of the core mold 15 of the upper mold 10 . A mold apparatus for manufacturing a core of a concave-convex cooling channel, characterized in that it includes at least two recesses (17). The method according to claim 1 or 2,
The third insert (13c) and the fourth insert (13d) of the insert (13) have a flat portion (20) whose inner surfaces facing each other are in contact with the front and rear surfaces of the core mold (15) in the upper mold (10). A mold device for manufacturing a concave-convex cooling channel core. The method according to claim 1 or 2,
The third insert 13c and the fourth insert 13d of the insert 13 move forward toward the center and move up to the line between the recesses 17 on both sides of the first insert 13a and the second insert 13b. and the first insert 13a and the second insert 13b move forward toward the center while accommodating the third insert 13c and the fourth insert 13d in the recesses 17 of both sides. A mold device for manufacturing a concave-convex cooling channel core, characterized in that interference can be excluded.

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