KR101413343B1 - Deburring device for injection molded plastic material - Google Patents

Abstract

The present invention relates to an apparatus for removing a burr from a molded object, and is capable of automatically removing burrs generated in an injection object while continuously introducing the burr into a known shot blast machine.
To this end, a chain 22 of a conveyor type which is installed over a plurality of sprockets 23 and circulates in the chamber 21 in accordance with the driving of the motor 24, and a plurality of shafts A jig 26 fixed on the upper surface of the shaft and on which the injection mold 27 is placed; a chamber 21 divided into first and second chambers 28 and 29; Jig reversing means provided in the area for shifting the position of the jig by 90 degrees before the jig enters the respective zones, and jig reversing means for jig reversing means for shifting the jig by 90 degrees on the upper, lower, left, And a nozzle (31) for spraying the abrasive (30) on the side of the nozzle (31).

Description

A device for removing burrs of an injection molded article made of a plastic material.

The present invention relates to an apparatus for removing a burr from a molded article, and more particularly, to an apparatus for removing burrs from a molded article, more specifically, a plastic material for automatically removing burrs generated in an injection mold while continuously introducing the burrs into a known short- The present invention relates to a deburring device for a molded article.

In general, electronic and communication devices such as mobile phones, MP3s, and notebooks are injection-molded using plastic that maintains high rigidity so that they can not be easily broken even if they are accidentally dropped during use.

Injection molded from such high rigidity plastic material causes burrs at the part where the upper and lower molds are closed, that is, the parting line, as the mold is repeatedly used. It must be removed from the finished product after injection molding.

Conventionally, the burr generated in the parting line of the finished product by injection molding has been removed by using a special knife. However, since the injection molded article is injection-molded by the plastic which maintains high rigidity, the burr generated also maintains high strength, There were many difficulties to remove.

Therefore, in the process of removing the burr, there are various problems that the worker's hand is torn by carelessly by the special knife, or the work efficiency is lowered due to the removal of burrs.

In order to solve the above problem, a method of automatically removing burrs generated on a parting line using a known short-blast machine was developed by the applicant and filed with the patent application No. 2010-58597 and registered on August 23, 2012 .

FIG. 1 is a perspective view of a chamber of a short-bladed machine to which a conventional technique is applied, FIG. 2 is a cross-sectional view of FIG. 1, and FIG. 3 is a perspective view of a nozzle installed around the jig, A turntable 2 of an index type is rotatably installed inside the turntable 2 and a nozzle 4 for spraying the abrasive material toward the injection 3 is provided in the vicinity of the turntable 2. The nozzle 4 As shown in Fig. 3, are provided so as to be rotatable up, down, left, and right on the side and upper part as well as the lower part of the injection object 3 placed on the jig 5. Fig.

As shown in FIG. 3, the turntable 2 is provided with a plurality of rotators 7 rotating on the same axis 6 as the jig 5 on which the injection product 3 is placed. A plurality of rotating bodies 7 positioned on the right and left sides of the first and second motors 8 and 9 are closely contacted with the first and second belts 10 and 11, So that the three rotating bodies 7 closely attached to the first and second belts 10 and 11 are simultaneously rotated in the same direction.

When the jig 5 on which the injection molded article 3 is placed is drawn into the interior of the chamber 1 and rotated clockwise by the first belt 10, The burr 3a generated during the molding of the injection molded product 3 is primarily removed by the abrasive 12 and the abrasive 12 is removed at the point where the section is out of the range of 5 to 7 kg / The jig 5 rotates in the counterclockwise direction by the second belt 11 so that when the abrasives 12 are jetted through the nozzles 4 under the same conditions, As shown in FIG.

The motor 3 of the turntable 2 (not shown in the figure) is rotated in a state in which the molded article 3 molded by a mold (not shown) is loaded on the jig 5 of the turntable 2 exposed to the outside of the chamber 1 The turntable 2 rotates in the clockwise direction by one step in the figure so that the jig 5 loaded with the injection product 3 is drawn into the chamber 1. [

In the above-described operation, the finished work inside the chamber 1 is unloaded by the operator since it is taken out to the outside of the chamber 1 while being placed on the jig.

When the injection molded product 3 formed on the jig 5 of the turntable 2 is put on top of the chamber 1 and then sequentially drawn into the chamber 1, a plurality of rotors 7 positioned on the right side of the chamber 1 Another plurality of rotating bodies 7 connected to the belt 10 and located on the left side of the chamber 1 are connected to the second belt 11. [

Therefore, the plurality of rotors 7 located on the right side of the chamber 1 rotate clockwise as the first belt 10 rotates in the clockwise direction in accordance with the driving of the first motor 8, The plurality of rotating bodies 7 rotating in the counterclockwise direction are rotated counterclockwise as the second motor 9 is driven.

As described above, when the plurality of rotors 7 located on the right side of the chamber 1 rotate clockwise and the plurality of rotors 7 located on the left side rotate counterclockwise, The abrasives 12 having a thickness of 0.1-0.5 mm are sprayed at a pressure of 5-7 kg / cm 2 from the nozzles 4 located on the top, bottom, left, and right of the jig 5 placed thereon, The burr 3a in the injection mold 3 is primarily removed during the passage of the right side of the jig 5 while the injection molding 3 is loaded three times on the top surface of the jig 5 .

Thereafter, when the jig 5 on which the injection product 3 is placed is moved out of the right side section of the chamber 1, the jig 5 is brought into close contact with the second belt 11 located on the left side of the chamber 1, The burr 3a which has been removed by the abrasive 12 sprayed from the nozzle 4 does not reach the abutting portion 3a by the second belt 11 as the abrasive 12 is rotated by the first belt 10 in the clockwise direction, The secondary removal of the burr 3a is also carried out in such a manner that the injection 3 is loaded on the upper surface of the jig 5 outside the chamber 1, . ≪ / RTI >

As the turntable 2 rotates, when the burr 3a generated in the molding of the injection product 3 is circulated through the interior of the chamber 1 and then is discharged to the outside of the chamber 1 in a clean state, The work is completed by unloading the finished workpiece from the jig 5.

However, such a conventional method has the advantage that the abrasive is projected onto the injection side to cleanly remove the burrs in a short time. However, since the method of removing the burrs of the injection objects placed on the jig while rotating the turntable by one step, Resulting in a decrease in productivity.

In addition, since the position of the nozzle for spraying the abrasive material can not be automatically changed, there is a problem that the operation of adjusting the position of the nozzle is troublesome as the size of the injection object changes.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the conventional problems as described above, and it is an object of the present invention to apply a conveyor type to a known short-brushed machine to remove burrs in a process of continuously moving an injection material.

Another object of the present invention is to divide the inside of the chamber into two zones so that the jig on which the injection object is placed is rotated by 90 degrees just before entering the respective zones, As shown in FIG.

According to an aspect of the present invention for achieving the above object, there is provided a sprocket comprising: a chain of a conveyor type installed to span a plurality of sprockets and circulating inside a chamber in accordance with driving of a motor; a plurality of shafts rotatably installed in the chain; A chamber which is fixed to the upper surface of the shaft and on which the injection object is placed, a chamber which is divided into first and second chambers, and a chamber which is provided in each of the chambers and which switches the position of the jig by 90 degrees before the jig enters each chamber And a nozzle for spraying the abrasive material on the side of the injection molded article placed on the jig so as to be movable on the upper, lower, left, and right sides of the respective zones, is provided .

The present invention has various advantages as compared to the prior art.

First, the burr formed in the injection molding material is removed while continuously moving the injection molding material into the interior of the chamber, thereby doubling the work efficiency.

Second, since the nozzle for spraying the abrasive material on the injection-molded side can be moved up, down, left, and right by the plurality of servo motors, the position of the nozzle can be quickly adjusted even if the size of the injection object is changed.

1 is a perspective view showing a chamber of a short-brushed machine to which the prior art is applied;
Figure 2 is a cross-
Fig. 3 is a perspective view showing an installation state of a nozzle located around the jig
4 is a front view of a shot blast machine to which the present invention is applied
Fig. 5 is a plan view of Fig. 4
6 is a plan view showing the inside of the chamber and a longitudinal sectional view
7 shows a state in which the nozzle is installed

Hereinafter, the present invention will be described in more detail with reference to FIGS. 4 to 7 showing an embodiment of the present invention.

FIG. 4 is a front view of a shot blast machine to which the present invention is applied, FIG. 5 is a plan view of FIG. 4, and FIG. 6 is a plan view and a longitudinal sectional view showing the interior of the chamber, Type chain 22 is provided so as to span a plurality of sprockets 23 so that the chain 22 is circulated in the chamber 21 as one of the sprockets 23 is rotated by the drive of the motor 24 A plurality of shafts 25 are rotatably installed at predetermined intervals in the chain 22 and a jig 26 on which the injection object 27 is placed is fixed to the upper surface of the shaft 25 .

The inside of the chamber 21 through which the jig 26 moves is divided into first and second zones 28 and 29 and jigs 26 are provided in the first and second zones 28 and 29, A jig reversing means for turning the position of the jig 26 by 90 degrees before entering the zone is provided on the upper side, the lower side, the left side and the right side of the respective zones, and the abrasive 30 (Not shown).

The jig inverting means may include a first guider 32 installed in the first zone 28 and having a downwardly inclined slope 32a as shown in Fig. 6 in an embodiment of the present invention, A second guider 33 which is installed in the first zone 28 with a short length and has an inclined slope 33a inclined upwards and a second guider 33 which is provided in the second zone 29 with respect to the first and second guiders 32, A third guider 34 having a downwardly sloping inclined surface 34a and a lower length than the first guider 32 in the second zone 29 with a shorter length than the third guider. A fourth guider 35 having an inclined surface 35a inclined upwards at the same time as the first guider 35 and a second guider 35 fixed to each of the shafts 25 provided so as to be rotatable so that the shaft is rotated 90 degrees by the inclined surfaces of the guiders (36) and (37).

At this time, if the bearings 38 and 39 are installed at the ends of the first and second actuating pieces 36 and 37, it is possible to reduce wear and noise due to friction with each guider.

However, it is understandable that the jig inverting means can be applied by various methods such as a step motor (not shown) operated by a person skilled in the art by sensing a sensor (not shown) or the like.

According to the present invention, the position of the nozzle 31 for spraying the abrasive 30 can be more accurately and quickly adjusted according to the size (height) of the injection material 27 for removing burrs.

For this, in an embodiment of the present invention, as shown in FIG. 7, X-axis rails 40 are respectively installed in the first and second zones 28 and 29 for partitioning the interior of the chamber 21, Two Y-axis rails 41 are provided on each X-axis rail 40 so as to be movable left and right by a servo motor 42. The Y-axis rails 41 are provided with respective servo motors 43 The nozzle 31 moving upward, downward, leftward and rightward is provided so as to be movable up and down by another servo motor 44 (45).

The detailed configuration of the Y-axis rail 41 and the nozzle 31 moved by the respective servo motors is a well-known technology well known in the art, so that detailed illustration and description thereof will be omitted.

7 showing only one embodiment of the present invention shows only the configuration of the first zone 28, and the configuration of the second zone 29 is also the same, so that the illustration and description thereof will be omitted.

Hereinafter, the operation of the present invention will be described.

First, when the motor 24 is driven, a chain 22 wound around a plurality of sprockets 23 is circulated in the chamber 21. In this state, the loading position (loading) position of the jig 26 to the upper surface of the jig 26, the burr 27 is continuously loaded.

When the jig 26 is loaded on the jig 26 as described above, the jig 26 loaded with the injection object 27 is drawn into the chamber 21 as the chain 22 moves.

When the jig 26 is drawn into the chamber 21 and reaches the first region 28, the bearing 38 provided at one end of the operating piece 36 is moved to the first region 28, The shaft 25 on which the jig 26 is fixed starts to rotate in the counterclockwise direction because it comes into contact with the downward inclined surface 32a of the jig 26. [

This is because the shaft 25 to which the jig 26 is fixed until the bearing 38 passes through the downward inclined face 32a as the bearing 38 is moved in contact with the downward inclined face 32a due to the movement of the chain 22, Direction.

Thereafter, when the bearing 38 provided at one end of the operating piece 36 completely passes through the downward inclined surface 32a of the first guider 32, the bearing 38 provided at the other end of the operating piece 36 The shaft 25 provided with the jig 26 continues to rotate counterclockwise so that the bearing 38 passes through the end of the upward inclined surface 33a, The injection object 27 seated on the upper surface 26 remains in a horizontal state.

At this time, since the bearings 38 provided at both ends of the operation piece 36 pass between the first and second guiders 32, 33, the injection articles 27 seated on the jig 26 do not flow.

7, when the jig 26 passes through the first zone 28 in a state where the jig 26 is maintained in a horizontal state, the nozzles 31 installed above, below, left, and right of the jig 26, The abrasive 30 is ejected toward the injection mold 27, so that burrs located at the long sides of the injection mold 27 are removed.

When the jig 26 on which the injection object 27 is placed passes through the first section 28 and the burr located at the long side of the injection object 27 is removed as described above and then reaches the second section 29 The bearing 39 provided at one end of the operating piece 37 comes into contact with the downward inclined surface 34a of the third guider 34 so that the shaft 25 provided with the jig 26 gradually rotates counterclockwise .

This is because the movement of the chain 22 as in the first zone 28 causes the jig 26 to move downward until it passes the downward inclined surface 34a as the bearing 39 moves in contact with the downwardly inclined surface 34a The fixed shaft 25 is rotated counterclockwise.

Thereafter, when the bearing 39 provided at one end of the operating piece 37 completely passes through the downward inclined surface 34a of the third guider 34, the bearing 39 provided at the other end of the operating piece 37 The shaft 25 provided with the jig 26 continues to rotate counterclockwise so that the bearing 39 passes through the end of the upward inclined surface 35a, The ejected articles 27 seated on the upper surface 26 remain in the vertical state.

At this time, since the bearing 39 provided at the end of the operation piece 37 passes between the third and fourth guiders 34 and 35, the injection product 27 seated on the jig 26 does not flow.

As described above, in a state in which the ejected object 27 seated on the jig 26 is in the vertical state and passes through the second zone 29, the jig 26 is positioned on the upper, lower, left, The abrasive 30 is sprayed toward the burr formed on the injection object 27 in the process of rotating the installed nozzle 31, so that the burr located at the short side of the injection object 27 is removed.

A jig 26 is fixed to a shaft 25 provided at predetermined intervals in the chain 22 so that the movement of the chain 22 can pass through the first and second sections 28 and 29 in the chamber 21, When the burr formed in the burner 27 is removed from the chamber 21 to the outside of the chamber 21 and reaches the unloading position, the burr is unloaded from the removed injection object 27, By loading the injection material into the jig 26, continuous operation becomes possible.

In order to remove the burrs of the injection object (not shown) having a different height by loading the injection object 27 of a certain shape onto the jig 26 and removing the burr, a nozzle 31 for spraying the abrasive material 30 is used. The position of the nozzle 31 can be adjusted by operating the servo motor 42, 43, 44, 45 according to need, by operating the control unit (not shown) The nozzle can be adjusted to an accurate position.

It is to be noted that the technical spirit of the present invention has been specifically described according to the above-described preferred embodiments, but it should be noted that the above-described embodiments are intended to be illustrative and not restrictive.

It will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the present invention.

21: Chamber 22: Chain
25: axis 26: jig
27: Injection 28: Zone 1
29: second zone 31: nozzle
32, 33, 34, 35: first, second, third and fourth guiders 36, 37:
38, 39: Bearing 40: X-axis rail
41: Y-axis rails 42, 43, 44, 45: Servo motor

Claims (4)

A chain 22 of a conveyor type which is installed over a plurality of sprockets 23 and circulates in the chamber 21 according to the drive of the motor 24 and a plurality of shafts 25 rotatably installed in the chain, , A jig (26) fixed on the upper surface of the shaft and on which the injection material (27) is placed, a chamber (21) divided into first and second zones (28) and (29) Jig reversing means for switching the position of the jig by 90 degrees before the jig enters the respective zones, and jig reversing means for jig reversing means for moving the jig in the upper, lower, left, And a nozzle (31) for spraying the plastic material (30). The method according to claim 1,
The jig reversing means includes a first guider 32 installed in the first zone 28 and having a sloping inclined surface 32a inclined downwardly and a second guider 32 disposed on the first zone 28 in a shorter length than the first guider 32, A second guider 33 having an inclined slope 33a upwardly inclined at the same time as the first guider 33a is installed and a second guider 33a provided at the second zone 29 lower than the first and second guiders 32, And a third guider 34 having a length shorter than that of the third guider 34 and disposed in the second zone 29 lower than the first and second guiders 32 and 33, A first and a second actuating members 36 and 37 fixed to each of the axles 25 rotatably installed to rotate the shaft 90 degrees by the inclined surfaces of the guiders, Wherein the first and second molds are made of a plastic material. The method of claim 2,
And a bearing (38) (39) is provided at an end of the first and second actuating pieces (36) and (37). The method according to claim 1,
The X axis rails 40 are respectively installed in the first and second sections 28 and 29 partitioning the interior of the chamber 21 so that two Y axis rails 41 are provided on the respective X axis rails 40 The nozzle 31 which is moved upward, downward, leftward and rightward by the servomotor 43 is mounted on another Y-axis rail 41 by another servo motor 44 45). The apparatus as claimed in claim 1, wherein the detachable member is formed of a plastic material.

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