KR20140101203A

KR20140101203A - Auto buffing machine

Info

Publication number: KR20140101203A
Application number: KR1020130014595A
Authority: KR
Inventors: 이정민
Original assignee: 이정민
Priority date: 2013-02-08
Filing date: 2013-02-08
Publication date: 2014-08-19

Abstract

The present invention relates to an automatic buffing apparatus for removing burrs formed on a product. In particular, the automatic buffing apparatus automatically removes burrs of a mobile phone case formed by injection molding. The automatic buffing apparatus includes a mounting jig which is rotatably installed on a moving plate, moving back and forth, allows a product, which is formed by injection molding and has burrs, to be mounted thereon, and is rotated by a rotational driving means; a polishing member which is rotated by the rotational driving means and grinds the burrs; and a forward and backward driving means which transfers the moving plate toward the polishing member in the forward direction in order to remove the burrs, and transfers the moving plate backward after removing the burrs.

Description

[0001] AUTO BUFFING MACHINE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a buffing apparatus for removing a burr formed in a product, and more particularly, to an automatic buffering apparatus for an injection cellular phone case for automatically removing a burr of an injection molded cellular phone case.

Magnesium, aluminum, and the like, and injecting the molten metal into the injection mold at a high pressure to mold various products such as a mobile phone case.

In the injection mold, a spin pin is configured to separate the molded object. In the portion where the spin pin is located, a molten raw material flows into the gap due to the pressure of the spinneret to generate a burr.

If the product is used in a state where the burr is formed in a product such as a mobile phone case, it is not only bad in appearance, but also causes various problems such as scratches and scratches on the burr during handling. Particularly, in the case of a product requiring precision, if the bur is left as it is, the product becomes a defect.

Therefore, in the case of the injection molded product, the operation of removing the bur is necessarily required. Conventionally, in order to remove the burr formed by the injection molding, the worker directly grasps the injection product and changed the bur part to the rotating type grinding stone.

In this way, when the burrs of the injection product are removed by the human hand, it is difficult to uniformly maintain the quality between the products, and the productivity is deteriorated and the yield of the final product is lowered. In addition, it is somewhat difficult for beginners to maintain uniform product quality, and even for experienced workers, there is no way but to make a quality deviation between products.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an automatic buffing apparatus capable of uniformly maintaining the quality of products by automatically removing burrs formed in an injection molded product.

The automatic buzzing device of the present invention comprises: a seating jig rotatably mounted on a movable member which is moved forward and backward and which is rotated by rotation driving means; An abrasive member rotated by rotation driving means to abrade the burr; And forward and backward driving means for advancing the shifting member toward the abrasive member for removing the burrs and for moving the shifting member back after the burrs are removed.

According to the present invention, there is provided an automatic buffing apparatus comprising: a product fixing unit for stably holding an injection-molded product in a polishing process of a burr by pressing an injection-molded product seated on a seating jig; And elevation driving means for elevating and lowering the product fixing portion in connection with the product fixing portion.

The product securing portion is rotatably connected to the elevating and lowering drive means so that the product securing portion rotates together with the injection-molded product placed on the seating jig.

The moving member, the product fixing section, and the lifting drive means are simultaneously moved forward and backward.

The moving member is configured to be able to move forward and backward in the polishing process according to the shape of the injection-molded product and can freely adjust the pressure to push the injection-molded product to the polishing member through the forward and backward driving means.

According to the automatic buffering device of the present invention, there are the following effects.

First, the pressure for pushing the injection molded product toward the abrasive member can be freely adjusted, so that it is possible to maintain the stable quality according to the customer's demand. In other words, you can create the same quality standards that your customers demand.

Secondly, since the worker manually operates the worker manually, the work time can be greatly shortened. This can improve work efficiency by improving worker fatigue.

Third, it is possible to produce a large quantity of products by investing the same working time, and it is possible to reduce the consumable cost by using the automatic equipment which used the conventional grinding machine and sandpaper.

1 is a plan view of an automatic buffing apparatus according to a preferred embodiment of the present invention;
2 is a cross-sectional view showing a state where the injection-molded product shown in Fig. 1 is seated;
3 is a cross-sectional view showing a state in which the injection-molded product shown in Fig. 1 is seated;
4 is a view showing a state in which an injection-molded product is polished while rotating.
Figure 5 compares injection molded articles before and after polishing.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an automatic buffering device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view showing an automatic buffing apparatus according to a preferred embodiment of the present invention, and FIG. 2 is a sectional view showing a state where the injection-molded product shown in FIG. 1 is seated. For reference, FIG. 1 is a plan view showing a state in which the product fixing section and the elevation driving means are omitted.

The automatic buffing apparatus according to the present invention includes a rail 10, a rail guide 20, a moving plate 30, a seating jig 40, a product fixing unit 50, a polishing member 60, 70, a second rotation driving means 80, a forward / backward driving means 90, and an elevation driving means 100.

The pair of rails 10 are arranged parallel to each other and horizontally installed so that the seating jig 40 can be moved forward and backward toward the abrasive member 60. The rail guide 20 is slidably mounted on the rail 10 to support the moving plate 30.

The moving plate 30 is horizontally fixed on the pair of rail guides 20 and a vertical plate 31 is vertically installed on one side of the moving plate 30, The driving means supporting plate 32 supporting the driving means 100 is horizontally fixed. The moving plate 30, the vertical plate 31, and the driving means supporting plate 32 are firmly fixed to each other and slide together.

The seating jig (40) is rotatably installed at the center of the moving plate (30) using a rotating shaft (41). An injection-molded product 1 such as a mobile phone case or the like is seated on the upper portion of the seating jig 40.

The product fixture 50 is pressed against the seating jig 40 by pressing the upper surface of the injection-molded product 1 seated on the seating jig 40 so that when the burr is removed by the abrasive member 60, 1) is prevented and uniform polishing is enabled. The product fixing unit 50 is formed in a plate shape and is rotatably connected to the elevation driving means 100 by a bearing. Therefore, when the injection-molded product 1 is rotated during the polishing process, the product fixing part 50 also rotates together, so that the fixed state of the injection-molded product 1 can be stably maintained.

The abrasive member 60 is rotatably installed in the left-to-right direction in place, and the burr formed in the injection-molded product 1 is polished and removed. The polishing member 60 is formed in a circular shape and polishes the burr through the outer circumferential surface thereof.

The first rotation driving means 70 rotates the abrasive member 60 and includes a driving motor 71, a belt 72 for transmitting the driving force of the driving motor 71 to the abrasive member 60, And a rotary gear 73 mounted on the rotary shaft 61 of the rotary drum 60 and connected to the belt 72.

The second rotation driving means 80 rotates the seating jig 40 and includes a driving motor 81, a belt 82 for transmitting the driving force of the driving motor 81 to the seating jig 40, A rotary gear 83 fixed to the rotary shaft 41 of the rotary shaft 40 and connected to the belt 82 and a rotary gear 83 disposed at a position spaced apart from the rotary gear 83 and connected to the belt 82, And a tension adjusting gear 84 for adjusting the tension of the belt 82.

The forward / backward driving means 90 is connected to the moving plate 30 to advance / retract the moving plate 30, and is configured as an air cylinder. It is possible to control the degree of close contact of the injection-molded product 1 which is in close contact with the abrasive member 60 by adjusting the pressure of the air cylinder.

The elevating and lowering driving means 100 is vertically fixed to the driving means supporting plate 32 to raise and lower the product fixing portion 50 and is configured as an air cylinder.

FIG. 3 is a front view showing a state where the injection-molded product shown in FIG. 1 is seated, and FIG. 4 is a view showing a state where an injection-molded product is polished while being rotated.

3, the injection-molded product 1 is placed on the seating jig 40 in a state where the product fixing portion 50 is lifted by the lifting drive means 100, and the product fixing portion 50 The injection molded product 1 is firmly fixed to the seating jig 40 by pressing down the upper surface of the injection molded product 1. [

After the injection-molded product 1 is placed, the moving plate 30 is advanced by using the forward and backward driving means 90 as shown in FIG. 4, so that the burr portion of the injection- . The pressure of the air cylinder constituting the forward / backward driving means 90 is regulated according to the size of the bur or the degree of polishing.

After advancing the injection-molded product 1, the abrasive member 60 and the injection-molded product 1 are rotated in the same direction. The rotation of the abrasive member 60 and the injection-molded product 1 in opposite directions causes the rotation of the abrasive member 60 to interfere with the rotation of the injection-molded product 1 because the injection- But also the polished portion is not smooth.

The moving plate 30 and the seating jig 40 are moved forward and backward according to the shape of the injection-molded product 1 so that the shape of the injection-molded product 1 is not a regular shape. During the polishing process, the polishing member 60 rotates at a high speed (500 to 1,000 rpm) and the injection-molded product 1 rotates at a low speed (1 to 10 rpm). As such, the polishing member 60 must be rotated at high speed so that the polishing portion can be smoothly polished, and the injection-molded product 1 must be rotated at a low speed so that the polishing portion can be uniformly and sufficiently polished to a desired extent.

During the grinding process, the injection-molded product (1) continues to rotate, and when it is rotated one turn (360 °), it stops polishing and stops. When the polishing is completed, the injection-molded product (1) is moved backward by the forward / backward driving means (90).

After the injection-molded product 1 is moved back, the injection-molded product 1 after the completion of the buffing is separated from the seating jig 40 while the product fixing portion 50 is lifted by using the lifting and driving means 100.

5 is a comparison of injection molded articles before and after polishing.

At the lower end of the pre-polishing injection-molded product 1, a burr 2 protruding outward is formed. These burrs 2 must be removed because they degrade the quality of the product and cause inconveniences in use.

By using the automatic buffering device of the present invention, burrs 2 are cleanly removed and the surface of the injection-molded product 1 becomes smooth.

As described above, the automatic buffering device according to the present invention has been described on the basis of the preferred embodiments. However, the present invention is not limited to the specific embodiments, and those skilled in the art can change the scope of claims have.

1: Injection molding product 10: Rail
20: rail guide 30: moving plate
40: seat jig 50: product fixing section
60: abrading member 70: first rotation driving means
80: second rotation drive means 90: forward / backward drive means
100:

Claims

A seating jig rotatably mounted on a movable member which is moved forward and backward and which is rotatably driven by a rotary drive means on which an injection molded product having a bur is formed;
An abrasive member rotated by rotation driving means to abrade the burr; And
And forward and backward driving means for advancing said moving member toward said abrasive member for removal of said burr and for moving said moving member back after removing said burr.

The method according to claim 1,
A product fixing unit for stably holding an injection molded product in a polishing process of the burr by pressing the injection molded product seated on the seating jig; And
And an elevating driving means connected to the product fixing portion to elevate the product fixing portion.

3. The method of claim 2,
Wherein the product fixing portion is rotatably connected to the elevation driving means so that the product fixing portion rotates together with the injection molded product seated on the seating jig.

The method of claim 3,
Wherein the moving member, the product fixing unit, and the lifting / lowering drive unit are simultaneously forward and backward.

5. The method according to any one of claims 1 to 4,
The moving member is configured to move back and forth in the polishing process according to the shape of the injection-molded product and is capable of freely adjusting a pressure for pushing the injection-molded product to the polishing member through the forward / backward driving means Automatic buffering device.