KR101597436B1 - Press for manufacturing wheel core for vehicle - Google Patents

Abstract

The present invention relates to an apparatus for manufacturing a wheel core inserted into a wheel of a vehicle and integral with the wheel.
The present invention realizes a new type of product take-out method in which a mold surrounding a product is lifted up before a product is taken out after press molding, and then the product is taken up and taken out, Which can be easily taken out and reduced in defects. On the other hand, a new type of product drying method using a mold structure having a jig means capable of gripping the inside of the product when the product is dried after press molding The present invention provides a vehicle wheel core manufacturing apparatus capable of securing the quality of a product by preventing deformation due to product shrinkage and drying (producing) the product with a certain standard (same size).

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for manufacturing a wheel core for a vehicle, and more particularly, to an apparatus for manufacturing a wheel core inserted into a wheel of a vehicle and integrated with the wheel.

Generally, a wheel of a vehicle is composed of a rim supporting a tire and a hub inserted in an axle. The hub has a hub shaft hole in which an axle is inserted and a plurality of hub nut holes in order to fix the wheel to the axle And a radial rim support is formed between the hub and the rim.

These wheels share the total weight of the vehicle together with the tires, and must withstand the torque at the time of driving and braking, the impact from the road surface, the centripetal force at the time of turning, the lateral force generated when the vehicle tilts, And light weight.

In consideration of this, the material of the ordinary wheel is manufactured by the die casting method using the aluminum alloy material which is the casting alloy, or by the spinning composite method such that the die casting method has the high strength and the high toughness.

For example, Korean Patent Laid-Open Nos. 10-2003-0078367 and Korean Patent Registration No. 10-1153083 disclose various methods for manufacturing a wheel of a vehicle.

Recently, in order to reduce the weight of a wheel, a wheel core built-in wheel, which is formed by inserting a wheel core made of a vermiculite material into the inside of a wheel made of an aluminum material, is widely used.

For example, as shown in FIG. 5, the wheel core 100 is made of a lightweight material rather than aluminum, which is a wheel material. The wheel core 100 is inserted into the wheel body 110 to be integrated with the wheel body 110 .

Such a wheel core built-in wheel is lightweight as compared with an aluminum material wheel, and has excellent durability, so that application examples thereof as a vehicle wheel are gradually increasing.

As a molding material of a wheel core, a vermiculite powder mixed with a binder or a glass bubble (glass powder) having a specific gravity smaller than a vermiculite is used.

Such a wheel core is manufactured in a press facility equipped with a mold device, a process of pressing a vermiculite powder into a mold, a process of drying a molded product having a wheel core form in a mold, do.

However, the conventional wheel core manufacturing method has the following problems.

First, when the product is raised for taking out the product in the mold after the press molding, the contact area with the mold is large, so that it is not easy to take out and there is a problem that many defects occur.

Second, since the shrinkage of the vermiculite core is not uniform when dried after press molding, there is a problem that it is difficult to secure the quality of the product, such as difficulty in drying (producing) to a certain standard as deformation occurs.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a new type of product for lifting a product after the mold surrounding the product is lifted, It is an object of the present invention to provide an apparatus for manufacturing a wheel core for a vehicle, which can reduce the area of the product when the product is lifted, thereby allowing the product to be taken out easily and reducing defects.

Another object of the present invention is to provide a new type of product drying method in which a mold structure having a jig means capable of gripping the inside of a product when the product is dried after press molding is implemented to prevent deformation due to product shrinkage, (Production) of a product in the same size (same size) as that of a wheel core.

In order to achieve the above object, the present invention provides a wheel core manufacturing apparatus for a vehicle, comprising:

The apparatus for manufacturing a vehicle wheel core according to the present invention comprises: an upper mold capable of moving up and down by press power and forming a cavity for forming a product; an upper frame supporting the upper mold; and an upper mold and a cavity A lower frame supporting the lower mold, and an ejector installed on the lower frame to take out the molded product.

Particularly, the lower mold is composed of a lower inner mold positioned inside the cavity and a lower outer mold positioned outside the cavity, and the lower outer mold is coupled to the upper mold side when the upper mold is raised, .

Therefore, since the product is taken out in a state in which the lower outer mold is lifted up prior to taking out the product, the vehicle wheel core manufacturing apparatus can reduce the contact area at the time of product rising, so that the product can be easily taken out, There is a feature that can be prevented.

Here, the upper mold and the lower outer mold are connected to each other by a structure in which the head portion of the pin in the lower outer mold penetrates the pin groove on the upper mold side, more precisely the upper plate and the fastener is fastened to the head portion penetrating portion. And the like.

In addition, it is preferable that a fastening member for fastening the upper mold side and the lower outer mold together is made in a "U" shape so that the fastening member can be detachably fastened in a manner that it can be easily inserted or withdrawn laterally.

The apparatus for manufacturing a wheel core for a vehicle may further include a drying jig capable of accommodating a molded product, wherein the drying jig includes a ring-shaped A bottom plate and an inner vertical wall formed along the inner circumferential surface of the bottom plate and closely contacting the inner end of the product.

The drying jig may further include an outer vertical wall formed along the outer circumferential surface of the bottom plate and closely contacting the outer end of the product.

The vehicle wheel core manufacturing apparatus provided in the present invention has the following advantages.

First, by extracting the product in a state in which the lower outer mold surrounding the product is first raised after the press molding, the area contacted when the product is lifted can be reduced, so that the product can be easily taken out and the defect can be reduced .

Second, when the product is dried after press molding, it is possible to prevent the deformation due to shrinkage of the product by tightly holding the shape of the product by using the lower inner mold disposed inside the product, And can be dried (produced).

1 is a front view showing a wheel core manufacturing apparatus for a vehicle according to an embodiment of the present invention;
FIG. 2 is an enlarged view showing a binding state of an upper mold and a lower outer mold in an apparatus for manufacturing a wheel core for a vehicle according to an embodiment of the present invention. FIG.
3A is a perspective view showing a drying jig and a product (vermicite core) in an apparatus for manufacturing a wheel core for a vehicle according to an embodiment of the present invention.
3B is a cross-sectional view showing a drying jig and a product (vermicite core) in an apparatus for manufacturing a wheel core for a vehicle according to an embodiment of the present invention
4A to 4E are front views showing an operating state of a vehicle wheel core manufacturing apparatus according to an embodiment of the present invention;
5 is a schematic view showing a general vermiculite wheel core built-

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

FIG. 1 is a front view showing an apparatus for manufacturing a wheel core for a vehicle according to an embodiment of the present invention. FIG. 2 is an enlarged view showing a coupling state between an upper mold and a lower outer mold in an apparatus for manufacturing a wheel core for a vehicle according to an embodiment of the present invention. .

As shown in Fig. 1 and Fig. 2, the vehicle wheel core manufacturing apparatus can smoothly take out the product by minimizing the portion in contact with the product when the product is taken out, and accordingly, Can be prevented.

The upper mold 11 and the upper frame 12 are provided in the press facility and the lower mold 13 and the lower frame 14 are provided. And the lower mold 13 and the lower frame 14 are installed in the lower part of the equipment and are fixed to the upper mold 11 and the upper frame 12 while facing each other. Respectively.

The upper mold 12 is formed in a cylindrical shape corresponding to the shape of the product (wheel core) and fixed to the bottom surface of the upper plate 27 in the upper frame 12, Thereby forming the cavity 10 for the cavity.

Particularly, a pin groove 18 is formed at the edge of the upper plate 27 of the upper frame 12, and the pin groove 18 is opened at the side of the plate. 19 can be positioned through.

At this time, the pin groove 18 has a width wider than the diameter of the head portion 20 of the pin 19. Thus, when the upper plate 17 for lowering the upper and lower dies 11, The head portion 20 of the pin 19 in the lower mold 13 can naturally pass through the pin groove 18 and be positioned above the pin groove 18, that is, above the upper surface of the upper plate 27.

The fin grooves 18 can be formed in a plurality of places, for example, three to four places, which are arranged in a balanced manner at regular intervals along the edge of the upper plate 27 having a disk shape.

The lower mold 13 is also formed in a cylindrical shape corresponding to the shape of the product and is supported on the upper surface of the lower plate 28 in the lower frame 12 and the upper mold 12 and the cavity 10).

Here, in the case of the lower mold 13, a cylindrical lower inner mold 16 having an approximately L-shaped cross section positioned inward with respect to the cavity 10 and a cylindrical lower outer mold 17 ).

The lower inner mold 16 is fixed to the upper surface of the lower plate 28 by bolts and the lower outer mold 17 is fixed to the outer peripheral surface of the lower inner mold 16 through the inner peripheral surface thereof. And is disposed on the upper surface of the lower plate 28 while being assembled in a tangent structure.

Thus, the lower outer mold 17 remains on the lower plate 28, so that it is possible to raise the upper plate 27 when the upper plate 27 is lifted.

Particularly, the lower outer mold 17 is provided with a pin 19 as means for forming a coupling structure with the upper frame 12 side including the upper mold 11.

The pin 19 has a head portion 20 at the upper end and a screw portion at the lower end and is vertically fastened to the upper end of the lower outer mold 17 by using a screw portion at the lower end.

Three to four such pins 19 can be installed at positions corresponding one-to-one to the pin grooves 18 formed in the top plate 27.

A fastening piece 21 made of "U" shape is provided as a means for fastening the pin 19 and the pin groove 18.

The fastening piece 21 is moved in the state where the head portion 20 of the pin 19 in the lower outer mold 17 passes through the pin groove 18 on the upper mold 11 side and is positioned above the pin groove 18, Is inserted between the bottom surface of the head part 20 and the upper surface of the upper plate 27 in a state of being inserted horizontally so as to bind the pin 19 and the pin groove 18.

That is, since the head portion 20 of the pin 19 is hooked on the upper surface of the fastening piece 21 so as not to fall down, the pin 19 is lifted together with the fastening piece 21 when the upper plate is lifted So that the lower outer mold 17 integrally formed with the pin 19 can be raised together.

The lower outer mold 17 is fixed to the pin 19 by the engagement of the pin 19 and the pin groove 18 via the clamping piece 21 when the entire upper frame 12 including the upper mold 11 is lifted. That is, the engagement structure between the pin head portion and the fastening piece.

Further, the ejector 15 is provided as a means for taking out the product after the product is molded.

The ejector 15 is installed on the lower frame 14 to take out the product while performing an up-down operation. To this end, the ejector 15 is provided with a plurality of take-out pins 15b for directly taking out the product, a lifting plate 15c for lifting and lowering the plurality of take-out pins 15b integrally fixedly, And a cylinder 15c for providing a driving force for ascending and descending of the cylinder 15c.

The ejection pins 15b are vertically disposed on the inner side of the lower frame 14, that is, on the bottom of the lower plate 28 at regular intervals in the circumferential direction on the edge side of the lifting plate 15c, The formed product 100 protruding into the cavity 10 through the holes formed in the lower inner mold 16 and the lower plate 28 of the cavity bottom mold 13 and being contained in the cavity 10 You can push it out.

In the above description, the structure in which the ejector 15 has a plurality of ejection pins operated together by one driving means has been described. However, the present invention is not limited thereto, but a structure in which driving means are connected to each ejection pin, It is needless to say that the structure in which the respective extraction pins are operated separately is also possible.

Meanwhile, in the present invention, the drying jig 22 is provided as means for preventing the deformation of the product due to shrinkage when the product is dried after product molding is completed, and for always producing products with a certain standard.

For this, as shown in FIGS. 3A and 3B, the drying jig 22 has a circular frame structure corresponding to the shape of the product, and the product is accommodated in the frame and dried, It is possible to prevent it from becoming.

That is, by holding the wheel core 100 made of vermiculite material or other material whose shrinkage is unstable or the like, into the drying jig 22 of the frame structure, it is possible to prevent deformation such as distortion due to shrinkage.

The drying jig 22 includes a ring-shaped bottom plate 24 having a plurality of holes 22 formed at regular intervals along the circumferential direction. Particularly, the inner surface of the bottom plate 24 has a predetermined height The inner vertical wall body 25 is integrally formed along the inner peripheral surface.

This allows the inner vertical wall 25 to adhere to the inner end (inner peripheral surface) of the product 100 while the product 100 is inserted into the drying jig 22 to hold the product 100, (100) can be dried without deformation in the drying jig (22).

The drying jig 21 is provided with an outer vertical wall 26 having a predetermined height formed along the outer circumferential surface of the bottom plate 24. The outer vertical wall 26 at this time has an outer end (Outer circumferential surface) of the product 100.

Since the product 100 housed in the drying jig 22 is supported between the inner vertical wall 25 and the outer vertical wall 26 while restricting the inner and outer circumferential surfaces thereof, So that it is possible to always produce products with a certain standard.

Accordingly, the operating state of the manufacturing apparatus for a vehicle wheel core having the above structure will be described below.

4A to 4E are front views illustrating an operating state of a vehicle wheel core manufacturing apparatus according to an embodiment of the present invention.

4A to 4E, when the entire upper frame 12 including the upper mold 11 is raised upward, the inside of the lower mold 11 in the lower frame 14, that is, the inside of the lower inner mold 11, For example, vermiculite powder, which is the material of the wheel core product, is filled in the cavity 10 formed by the lower outer mold 17 and the lower outer mold 17.

Next, the upper frame 12 and the upper mold 11 are lowered to join the lower inner mold 16 and the lower outer mold 17 through press operation, and the vermiculite powder contained in the cavity 10 is pressed do.

At this time, the head portion 20 of the pin 19 in the lower outer mold 17 passes through the pin groove 18 formed in the upper plate 27 and moves to the upper side of the upper plate 27 .

Next, when the molding of the product is completed in the cavity 10, the fastening piece 21 is fastened between the bottom surface of the head part 20 and the upper surface of the upper plate 27 to press the lower external mold 17 into the upper plate 27).

Subsequently, when the entire upper frame 12 including the upper mold 11 is lifted up through the press operation, the engaging structure between the pin 19 and the pin groove 18 via the engaging piece 21 is engaged The lower outer mold 17 is also raised.

When the ejector 15 on the side of the lower frame 14 is operated in the state where the upper mold 11 and the lower outer mold 17 are lifted up, And is taken out.

Since the product 100 to be taken out at this time rises while making a minimum contact with the lower inner side mold 16 side, the product can be taken out very easily, thereby preventing defective products.

Next, the product 100 taken out from the mold side is put into the drying jig 22, and after being dried for a predetermined time, it is produced as a final product.

When the product 100 is dried, the inner and outer ends of the product 100 are closely supported by the inner vertical wall 25 as well as the outer vertical wall 26 in a state of being housed in the drying jig 22, So that the wheel core product can be manufactured in a constant size.

As described above, according to the present invention, by taking out the product while lifting up the upper mold side and the lower outer side mold at the time of taking out the product and applying the drying jig capable of holding the product at the time of drying the product, And it is possible to produce a product with a constant size without any deformation due to shrinkage.

10: Cavity
11: Upper mold
12: upper frame
13: Lower mold
14: Lower frame
15: Ejector
16: Lower inner mold
17: Lower outer mold
18: Pin groove
19: pin
20: head portion
21: fastener
22: Drying jig
23: Hall
24:
25: inner vertical wall
26: outer vertical wall
27: upper plate
28: Lower plate

Claims (5)

An upper mold (11) for forming a cavity (10) for product molding, which can move up and down by pressing power, an upper frame (12) for supporting the upper mold (11) A lower frame 13 for supporting the upper mold 11 and the cavity 10 and a lower frame 14 for supporting the lower mold 13 and a lower frame 14 mounted on the lower frame 14, And an ejector (15)
The lower mold 13 is composed of a lower inner mold 16 located inside the cavity and a lower outer mold 17 located outside the cavity and the lower outer mold 17 is connected to the upper mold 11 The upper mold 11 and the lower outer mold 17 are connected to each other by a pin groove 18 on the upper mold 11 side and a pin groove 19 on the lower outer mold 17, Wherein the head part (20) is passed through and the fastening piece (21) is fastened to the penetrating part of the head part.
delete The method according to claim 1,
Wherein a fastening piece (21) for fastening the upper mold (11) and the lower outer mold (17) together is detachably fastened in a "U" shape.
The method according to claim 1,
The drying jig (22) further comprises a ring-shaped (23) having a plurality of holes (23), and the drying jig (22) And an inner vertical wall body (25) formed along the inner circumferential surface of the bottom plate (24) and in close contact with the inner end of the product.
The method of claim 4,
Wherein the drying jig (22) further comprises an outer vertical wall (26) formed along the outer circumferential surface of the bottom plate (24) and in close contact with an outer end of the product.

Images