KR101700289B1

KR101700289B1 - Apparatus and method for manufacturing case

Info

Publication number: KR101700289B1
Application number: KR1020150082804A
Authority: KR
Inventors: 문덕열
Original assignee: (주)서진테크
Priority date: 2015-06-11
Filing date: 2015-06-11
Publication date: 2017-01-26
Also published as: KR20160146121A

Abstract

The case manufacturing apparatus of the present invention comprises a processing unit for removing a burr formed at a boundary between the metal region and the resin region in a terminal case having a metal region including a metal on one side and a resin region including a synthetic resin together; A putter for forming a plurality of putty layers on one surface of the terminal case from which the burrs have been removed; And a painting unit painting a paint on one side of the terminal case on which the putty layer is formed.

Description

[0001] APPARATUS AND METHOD FOR MANUFACTURING CASE [0002]

The present invention relates to an apparatus and a method for manufacturing a terminal case.

The terminal is provided with a case for the protection of the internal device and the safety of the user.

The inner surface of the terminal case faces the various electronic devices constituting the terminal, and the outer surface of the terminal case faces the external environment.

The process of manufacturing such a terminal case may include a painting process for improving the durability, corrosion resistance, and appearance of the case. However, in reality, it may be difficult to satisfy a paint condition for improving durability and the like.

Korean Patent Registration No. 1342793 discloses a process for manufacturing a metallic cellular phone case that is additionally mounted on four side edges of a cellular phone, but does not mention a process for a case that does not satisfy the coloring condition.

Korean Patent Registration No. 1342793

The present invention provides a case manufacturing apparatus and method for painting or redraining a terminal case.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise forms disclosed. Other objects, which will be apparent to those skilled in the art, It will be possible.

The case manufacturing apparatus of the present invention comprises a compression module in which compressed air is generated; A receiving portion for receiving the abrasive; And a discharge module for spraying the abrasive toward a painting surface completed in the terminal case using the compressed air, wherein the discharging module is capable of spraying the abrasive along a third direction inclined to the painting surface have.

The case manufacturing apparatus of the present invention includes a first nozzle and a second nozzle which are disposed apart from each other along the longitudinal direction of the object and in which the abrasive is sprayed toward the object, They can be formed to face each other at an angle.

The case manufacturing method of the present invention includes polishing a painted surface of the terminal case so that at least one existing putty layer remains in a terminal case painted with paint on n putty layers (where n is a natural number of 2 or more) ; Stacking an additional putty layer on the existing putty layer such that the putty layer of the terminal case satisfies n; And painting the paint on the additional putty layer.

The case manufacturing apparatus of the present invention includes a processing unit, a putting unit, and a painting unit, through which a terminal case having a metal area and a resin area together can be effectively painted.

Further, according to the present invention, a sand blast portion for polishing the terminal case to a state in which at least one putty layer remains intact may be included. As a result, it is possible to easily recycle or re-color the terminal case which has been judged to be defective in painting.

The present invention can provide a polishing method using an abrasive in order to peel a paint and putty layer from a terminal case in which a plurality of putty layers are formed and a paint is painted on the putty layer.

Accordingly, the recycling cost and the recycling time of the terminal case can be reduced. Therefore, it is possible to acquire the terminal case in which the re-coloring is completed in a short period of time through a simple process.

In order to realize the polishing using the abrasive, the discharge module facing each other can be applied. Therefore, the polishing method, which has been difficult in the past, can be applied to the repainting process.

1 is a schematic view showing a case manufacturing apparatus of the present invention.
2 is a schematic view showing a terminal case to be painted in the case manufacturing apparatus of the present invention.
3 is a schematic view showing a cross section of a terminal case painted by the case manufacturing apparatus of the present invention.
Fig. 4 is a schematic view showing the sand blast part. Fig.
5 is a schematic view showing a terminal case polished by an abrasive sprayed in a direction orthogonal to the machining plane of the terminal case.
6 is a side view schematically showing a case manufacturing apparatus of the present invention.
7 is a schematic view showing a terminal case polished by an abrasive sprayed in a direction tilted with respect to the machining surface of the terminal case.
8 is a side view schematically showing another case manufacturing apparatus of the present invention.
9 is a schematic view showing a terminal case polished by two discharge modules.
10 is a schematic view showing a traveling direction of the abrasive sprayed from each nozzle having an improper placement relationship.
11 is a flowchart showing a case manufacturing method of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The sizes and shapes of the components shown in the drawings may be exaggerated for clarity and convenience. In addition, terms defined in consideration of the configuration and operation of the present invention may be changed according to the intention or custom of the user, the operator. Definitions of these terms should be based on the content of this specification.

1 is a schematic view showing a case manufacturing apparatus of the present invention.

The case manufacturing apparatus shown in Fig. 1 may be a device for painting a case provided in a terminal such as a cellular phone.

The terminal case 10 to be handled in the case manufacturing apparatus shown in Fig. 1 may include a metal region 20 including a metal and a resin region 30 including a synthetic resin.

The case of a mobile terminal such as a mobile phone and a notebook may require grip feeling, corrosion resistance, and aesthetic appearance considering durability and ease of use that can withstand various impacts. In order to satisfy such a requirement, the terminal case 10 can be painted with paint.

In the case where the painted surface on which the paint is painted in the terminal case 10 includes one material, the painting process may be completed by applying a putty suitable for the material and painting the paint on the putty. In addition, the painted state of the terminal case 10 painted in this manner can easily satisfy the initial design value in the thickness of paint, flatness, and the like.

However, if the terminal case 10 includes a metal material, a problem may occur in the painting process.

Even if the terminal case 10 includes a metal material, there may be no problem if the terminal case 10 is made of only one metal material as described above. However, there may be a case where it is difficult to constitute the terminal case 10 only of metal.

2 is a schematic view showing a terminal case 10 to be painted in the case manufacturing apparatus of the present invention.

In the case of a mobile communication terminal such as a smart phone, it is preferable that the case is configured to pass radio waves for wireless communication. However, if the case is made of metal, the wireless communication function of the terminal can be paralyzed similarly to the principle that wireless communication is impossible in the elevator. In order to solve such a communication trouble, the terminal case 10 may be provided with so-called radio wave holes through which radio waves pass.

If the radio wave hole is left as it is, external foreign matter can flow into the inside of the terminal, so that the radio wave hole can be covered with a synthetic resin material that does not interfere with radio waves. According to this, a metal region 20 including a metal and a resin region 30 including a synthetic resin may be provided on one side of the terminal case 10. A camera hole 31 in which a camera module provided in the terminal is installed, an illumination hole 33 in which a lighting lamp is installed, a speaker hole 35 in which a speaker is installed, and the like may be provided in the resin region 30 or the metal region 20 have.

The following problems may occur when the surface on which the metal region 20 and the resin region 30 are present is painted.

First, the terminal case 10 including the metal and the synthetic resin may be formed through insert injection. However, in this process, flatness is easily damaged due to difference in thermal expansion.

Particularly, since burrs are formed at the boundary between the metal region 20 and the resin region 30, the damage to the flatness can be more serious.

Damage to the flatness due to thermal expansion is not limited to the initial stage of the painting operation, but can be continuously induced in the course of the painting operation. For example, the process of forming the putty layer 40 may include a post-process that smoothes and flattenes the surface of the putty after the putty is painted, and the flatness may be damaged due to frictional heat generated in the post-process.

Next, a measure may be required to allow the putty to adhere to the metal region 20 and the resin region 30 at the same time.

The case manufacturing apparatus of the present invention may include a processing unit 110, a putting unit 130, and a painting unit 150 in order to solve the problem of painting the terminal case 10 having such a problem.

Referring back to FIG. 1, the processing unit 110 may remove a burr formed at the boundary between the metal region 20 and the resin region 30 in the terminal case 10. In addition, the processing unit 110 can flatly process one side of the terminal case 10 on which burrs are formed in the process of removing burrs.

For example, the processing unit 110 may remove burrs by polishing the terminal case 10 through a sanding process.

The putter 130 may form a plurality of putty layers 40 on one side of the terminal case 10 from which burrs have been removed. The flatness of the terminal case 10 may be damaged due to frictional heat generated in the burr removing process or frictional heat generated in the process of forming the putty layer 40. The putter 130 thickens the putty so that the putty is thinned instead of applying one layer to the terminal case 10 so that the putty is simultaneously applied to the metal area 20 and the resin area 30 while restoring the flatness at this time The terminal case 10 can be folded in multiple layers.

That is, the putter 130 may form a plurality of putty layers 40 on one side of the terminal case 10. According to this, every time one putty layer 40 is laminated, the flatness degradation caused by the burr removal process or the previous putty layer 40 formation process can be gradually resolved. At the same time, the putty can be attached to both the metal region 20 and the resin region 30 at the same time.

The painting unit 150 can paint paint on one side of the terminal case 10 on which a plurality of putty layers 40 are formed. According to the painting unit 150, a paint layer 50 may be formed on the outer surface of the terminal case 10. Since the paint is painted on the putty layer 40 of the uppermost layer having the most improved flatness among the plurality of putty layers 40, the paint layer 50 can maintain a flat state.

Thus, according to the case manufacturing apparatus of the present invention, paint can be painted flat on the terminal since burrs are removed and a plurality of putting layers are formed.

However, when the total thickness of the putty layer 40 is set to h, the flatness may not satisfy the initial design value even though a plurality of putty layers 40 that satisfy h are formed. As the putty layer 40 is further laminated, i. E., The greater the h, the better the flatness. Therefore, if h is not set sufficiently large, the set flatness may not be satisfied.

3 is a schematic view showing a cross section of the terminal case 10 painted by the case manufacturing apparatus of the present invention.

3, a case where n number of putty layers 40 are formed on the terminal case 10 is disclosed.

The putting part 130 can form n putty layers 40 on the case like the first putty layer 40, the second putty layer 40, ..., and the nth putty layer 40.

However, since the thermal deformation of the metal region 20 and the resin region 30 is non-linear, it is practically impossible to select the number of the putty layers 40 appropriately. It is merely preferable to increase the possible n on the basis of the fact that the flatness gradually improves as the number of putty layers 40 increases. However, since the thickness of each putty layer 40 that can be realistically practiced is limited, and the thickness h of the entire putty layer 40 is determined according to the business policy, the number n is inevitably limited.

As a result, even if a plurality of putty layers 40 are formed after removing the burrs, the terminal case 10 which can not satisfy the initial designed flatness can be completed.

The terminal case 10 may be determined to be defective in the painting inspection process and may not be applied to the terminal. The terminal case 10 determined to be defective in this way can be recycled as the first method or the second method.

The first method may include a step of melting the terminal case 10 and then separating the metal material, the synthetic resin material, the putty, and the paint through a chemical process. However, since a large amount of resources are consumed in such a process, it may be advantageous to discard the terminal case 10 determined to be defective and to produce a new product.

The second method may include a step of peeling off the painted paint and performing the painting again based on that the above-mentioned poor judgment is due to a paint defect, not a mechanical defect of the terminal case 10. What is important in applying the second method is to flatten the surface of the terminal case 10 from which the paint is peeled off. According to this, when the painting operation is performed again, the defective determination ratio can be remarkably lowered. On the contrary, if the flatness of the terminal case 10 is not sufficiently improved when the second method is applied, the probability of receiving a failure judgment again may be increased even if the redrawing operation is performed.

A plasma peeling process or a chemical peeling process using a chemical agent may be applied to put the terminal case 10 into the vacuum chamber to peel the paint flat. However, it is obvious that the recycling treatment cost will increase according to the peeling process. In addition, since it is difficult to peel off the paint strongly bonded to the putty from the putty layer 40 and peel it flatly, it is necessary to peel the putty layer 40 together with the paint. At this time, it is difficult to peel off only a part of the putty layer 40 through a chemical reaction, so that all the putty layer 40 must be peeled off. The putty layer 40 may be formed from the first putty layer 40 to the nth putty layer 40 by the putting part 130 in the terminal case 10 peeled to the putty layer 40. [ However, since all of the putty layer 40 from the existing nth putty layer 40 to the first putty layer 40 is peeled off and a new first putty layer 40 is formed to the nth putty layer 40, There is a problem that the putty layer 40 is wasted.

The case manufacturing apparatus of the present invention may include a sand blast section 170 to prevent waste of the putty layer 40.

The sandblast portion 170 may polish one side of the terminal case 10 painted with the paint, thereby peeling off the paint. The sand blast section 170 can polish the terminal case 10 to a state where at least one putty layer 40 of the plurality of putty layers 40 remains intact. For example, if there are a total of five putty layers 40, the sandblasted portion 170 may be peeled off the three upper layers. The polished terminal case 10 is again inserted into the putter 130, and the putter 130 can newly add only the upper two putty layers 40. [ When the paint is repainted by the painting unit 150, the recycling of the terminal case 10 can be completed.

In spite of such a simple and rapid polishing process, application of a plasma process or a chemical process, which consumes a large amount of resources and requires a long processing time, is intended to maintain the flatness of the terminal case 10. Therefore, in order to use the sand blast part 170 for polishing the terminal case 10, the flatness of the machined surface must be ensured at the time of polishing.

When the colored surface of the terminal case 10 is placed on a plane formed by the x-axis and the y-axis in a space where the x-, y-, and z-axes are orthogonal to each other, the flatness of the colored surface is the x- Roads can be distinguished.

The sandblast unit 170 provided in the case manufacturing apparatus of the present invention may be configured to satisfy x-axis flatness and y-axis flatness.

First, a configuration that satisfies the y-axis flatness will be described.

4 is a schematic view showing the sand blast section 170. Fig.

The terminal case 10 requiring redrawing of the paint can move along the first direction 1 by the conveyance module 270 such as a conveyor belt for the automation process. The sandblast unit 170 is disposed in the movement path of the terminal case 10 so that the terminal case 10 can pass through the sandblast unit 170.

The sandblast unit 170 may be provided with a discharge module 210 through which the abrasive is sprayed toward the terminal case 10. The abrasive sprayed from the discharge module 210 can sandblast the painted work surface in the terminal case 10 passing through the sand blast section 170 to polish the work surface. At this time, the paint layer 50 formed on the terminal case 10 can be peeled off through the polishing.

For exfoliation of the paint, a goldsmith, glass bead, steel ball, sus ball, or the like may be used as an abrasive. However, it has been confirmed that 60 ~ 100 rooms are suitable for peeling paint in a specific experimental environment. Here, 60 rooms can mean a size in which 60 pieces can be placed on a square having a width of 1 inch and a length of 1 inch. Likewise, a room of 100 can mean a size that can accommodate 100 in the upper square.

When the first direction 1 on the xyz space is the x-axis, the discharge module 210 is arranged at a set interval along the second direction 2 perpendicular to the first direction 1 so that the y-axis flatness of the machined surface in the polishing process satisfies the set value And may include a plurality of nozzles 213, 214 arranged. According to such a configuration, the portion to be polished by the abrasive on the machining surface will be the same as a plurality of points arranged along the y-axis direction as shown in Fig. Accordingly, since the y-axis flatness is difficult to be satisfied, the discharge module 210 can reciprocate linearly along the second direction (2). According to this, the portion to be polished by the abrasive on the machining surface will be the same as the straight line extending along the y-axis. The portion to be polished in a linear shape can satisfy the y-axis flatness.

Further, in order to further improve the flatness, the plurality of nozzles may be arranged at equal intervals in an installation area longer than the length of the terminal case 10 in the second direction. The rectilinear reciprocating motion range of the discharging module 210 may be determined within a range that is equal to or greater than the interval between the nozzles and is equal to or smaller than the difference between the mounting area and the terminal case in the second direction.

The edge of the terminal case is not polished and the flatness between the edge area and the inner area of the terminal case 10 is lowered when the nozzle of the first or last nozzle among the plurality of nozzles reaches the inside of the terminal case 10. [ . However, according to the linear reciprocating motion range defined above, the nozzle disposed at the outermost one of the plurality of nozzles can be reciprocated only from the position away from the terminal case 10 in the second direction to the edge of the terminal case 10 . Therefore, the edge area of the terminal case 10 can be evenly polished like the inside area.

On the other hand, it is possible to consider a case where the abrasive is sprayed through a single nozzle extending from the beginning along the second direction (2) instead of a plurality of nozzles having discharge ports with a small cross-sectional area. That is, the abrasive may be sprayed through one nozzle extending in the second direction (2) beyond the length of the terminal case (10). However, the experimental results show that y - axis flatness is not satisfied enough. This is presumably due to the fact that the amount or speed of the abrasive output from the arbitrary point y1 in the nozzle is different from that output from y2.

The sand blast unit 170 may be provided with a compression module 230 for generating compressed air and a receiving module 250 for receiving an abrasive. At this time, the discharge module 210 can use the compressed air of the compression module 230 to spray the abrasive toward the painted surface at a position spaced apart from the painted surface of the terminal case 10 that has been painted. The compressed air and the abrasive may be discharged from the discharge module 210 together.

The abrasive is sprayed toward the terminal case 10 by compressed air, and strikes the terminal case 10. The painted paint or putty is peeled off from the terminal case 10 due to the impact of the abrasive, and the peeled particles can be blown away from the terminal case 10 by compressed air.

As the discharge module 210 is separated from the terminal case 10, the diameter of the polishing portion of FIG. 5 increases, which can contribute to the improvement of the flatness. Of course, if the separation distance of the discharge module 210 is increased to an infinite length, the abrasive force of the abrasive agent is reduced to such an extent that polishing of the painted surface is difficult. Therefore, the range of separation between the discharge module 210 and the working surface is within a range It is better to be determined.

In the above description, the configuration in which the y-axis flatness is improved by the discharge module 210 that linearly reciprocates along the second direction 2 at a position spaced from the nozzle and a plurality of nozzles arranged along the second direction 2 .

Next, a configuration that satisfies the x-axis flatness will be described.

The sandblast unit 170 may be provided with a transfer module 270 for transferring the terminal case 10 to the discharge module 210 in the first direction 1. In FIG. 4, since the x-axis direction corresponds to the first direction 1, the x-axis flatness can be determined by the transfer module 270. Thus, the transfer module 270 must be able to move at a set speed with a very high accuracy along at least the first direction 1. For example, the transport module 270 can move very slowly to have a very uniform speed. However, the transfer module 270, which moves so slowly, may degrade the operation speed, which is against the object of factory automation which aims at high speed.

As a result, the transfer module 270 has a problem of satisfying the x-axis flatness without lowering the operation speed.

The case manufacturing apparatus of the present invention can improve the x-axis flatness of the painted surface through the discharge module 210. [ According to this, since the dependency ratio of the transfer module 270 to the x-axis flatness can be reduced, high-speed operation is possible.

5 is a schematic view showing a terminal case polished by an abrasive sprayed in a direction orthogonal to the machining plane of the terminal case 10. Fig.

When a plurality of nozzles through which the abrasive is sprayed are provided at predetermined intervals along the y-axis and the discharge port of the nozzle is circular, the spots where the polishing is performed on the machined surface will have the same shape as a circular spot as shown in Fig. To improve the x-axis flatness, it is recommended that the area of the ridges be large. To this end, the nozzle may be spaced away from the point of impact on the working surface, or the outlet of the nozzle may become larger. However, according to this, since the striking force of the abrasive for striking the machined surface is lowered, it may be difficult to polish the machined surface.

Therefore, it is necessary to expand the nozzle portion in the state of having the same discharge range and the same discharge port as the nozzle forming the nozzle portion of FIG.

For example, the discharge module 210 may spray the abrasive along the third direction 3 &thetas;

6 is a side view schematically showing a case manufacturing apparatus of the present invention. The case manufacturing apparatus disclosed in Fig. 6 may be the sandblast unit 170 described above.

When the painted surface is parallel to the xy plane, the third direction? May be a direction inclined to the xy plane.

If the terminal case 10 is conveyed in the first direction 1 by the conveyance module 270 and the ejection module 210 linearly reciprocates along the second direction 2, the third direction 3 is perpendicular to the second direction 2 And may be a direction inclined in the first direction (1).

Accordingly, if the nozzle through which the abrasive 90 is discharged from the discharge module 210 is disposed at the first position a and the abrasive discharged from the nozzle collides with the terminal case 10 at the third position c, The first position a and the third position c may be different from each other.

According to the abrasive sprayed along the direction tilted to the paint surface as described above, the abrasive area of the paint surface can be expanded as shown in Fig. Particularly, when the third direction? Is inclined in the first direction?, The polishing region is expanded in the x-axis direction and the x-axis flatness can be improved. In some cases, the y-axis flatness can also be improved in this process.

7 is a schematic view showing a terminal case polished by an abrasive sprayed in a direction tilted with respect to the machining surface of the terminal case 10. Fig.

In other words, the abrasive particles sprayed in the direction tilted to the painted surface may form a droplet or a fan-shaped abrasive portion on the painted surface. The thus formed abrasive zone ⓙ can be more thinly peeled off the wider area of the terminal case 10 as compared with the abrasive zone 도 shown in Fig. The discharging module 210 linearly moves along the second direction and the terminal case 10 is transported in the first direction so that the abrasion site can be duplicated at a specific point of the terminal case 10 a plurality of times. According to this, the flatness of a specific point can be improved. This is similar to improving flatness by stacking a plurality of putty layers 40 of a similar thin thickness.

On the other hand, in order to further improve the flatness and speed up the polishing time, the discharge modules 210 may be provided at a plurality of different positions along the first direction 1.

8 is a side view schematically showing another case manufacturing apparatus of the present invention.

For example, the ejection module 210 may include a first ejection module 211 disposed at a first position a and a second ejection module 212 disposed at a second position b.

The abrasive discharged from the first discharge module 211 can strike the terminal case 10 at the third position c. The abrasive discharged from the second discharging module 212 may strike the terminal case 10 at the fourth position d.

At this time, the first position a, the third position c, the fourth position d, and the second position b may be sequentially arranged at different positions in the longitudinal direction of the terminal case 10. Here, the longitudinal direction of the terminal case 10 may be the same as the first direction 1 in which the terminal case 10 is fed.

The distance L2 between the third position? And the fourth position? May be shorter than the length L1 of the terminal case 10. According to this configuration, the abrasive sprayed along the virtual line y1 inclined to the painted surface from the first discharge module 211 and the abrasive sprayed along the virtual line y2 inclined to the painted surface from the second discharge module 212 are simultaneously You can hit the painted surface.

The direction of ejection of the abrasive sprayed from each ejection module 210 can be determined by the first nozzle 213 provided in the first ejection module 211 and the second nozzle 214 provided in the second ejection module 212 . Hereinafter, the first nozzle 213 and the second nozzle 214 will be mainly described.

The case manufacturing apparatus of the present invention may include a first nozzle 213 and a second nozzle 214 that are disposed apart from each other along the longitudinal direction of the object and in which the abrasive is sprayed toward the object.

The object may be, for example, a terminal case 10 painted with paint. However, the object is not limited to the terminal case 10 but may include various objects requiring polishing.

The first nozzle 213 and the second nozzle 214 may be formed to face each other in an oblique direction as shown in FIG. 8 to satisfy the arrangement relationship of the first to fourth positions.

For example, the ejecting direction of the first nozzle 213 and the ejecting direction of the second nozzle 214 may be in a line-symmetrical relationship with the axis of symmetry about an orthogonal line g orthogonal to the processing surface of the object. At this time, if the object is the terminal case 10 painted with paint, the processing surface may be a painted surface painted with paint on the terminal case 10. According to this configuration, the angle? Formed by the machining plane and the jetting direction of the first nozzle 213 can be equal to the angle? Formed by the machining plane and the jet direction of the second nozzle 214.

The first nozzle 213 may spray the abrasive along the first virtual line y1 and the second nozzle 214 may jet the abrasive along the second virtual line y2. Then, the first imaginary line y1 and the second imaginary line y2 can meet with each other at a specific point e. The arrangement of the first nozzle 213 and the second nozzle 214 that satisfy the virtual lines y1 and y2 may be in an 'oblique facing' state.

In addition, the object may be disposed between the specific point e and the first nozzle 213, or disposed between the specific point e and the second nozzle 214.

According to this configuration, the abrasive jetted from the first nozzle 213 along the line y1 can strike the object at the third position " C " in the longitudinal direction of the object and then bounce off to the opposite side. The abrasive discharged in this manner can be struck by the abrasive or compressed air injected along the y2 from the second nozzle 214 again in one of the sections from the third position? To the fourth position? In the object. The abrasive striking the object again can again strike one of the sections from the third position c to the fourth position d by the compressed air of the first nozzle 213. Hereinafter, a phenomenon in which one abrasive strikes an object multiple times by a specific nozzle and another nozzle is referred to as recycling of the abrasive.

As a result, according to the present invention, the abrasive sprayed from a specific nozzle can continuously hit one of the sections from the third position? To the fourth position? By the abrasive or compressed air injected from another nozzle. According to this, since the number of abrasive particles striking the object during the set time is increased, the polishing rate can be increased and the abrasive consumption can be minimized. Further, according to the present embodiment, since the wide section from the third position? To the fourth position? Is thinly polished, the flatness of the machined surface can be improved.

According to the abrasive sprayed from the nozzle facing each other as described above, the polishing area can be further expanded as shown in Fig.

9 is a schematic view showing the terminal case 10 polished by two discharge modules.

In other words, the abrasive discharged from the discharge module facing each other can strike a rectangular area from the third position? To the fourth position?, In a plan view. Therefore, the portion to be polished by the abrasive in the terminal case 10 may also be a rectangular region from the third position? To the fourth position?. The area 이 at this time can be very large as compared with the polishing area 도 shown in Fig. 5 and the polishing area 도 shown in Fig. This means that a larger area of the terminal case 10 can be polished to a thinner thickness. If the polishing area is repeatedly performed, the x-axis flatness and the y-axis flatness can be reliably improved.

In order to realize the above effect, the inclination angle between each nozzle and the object was found to be advantageous to satisfy the experiment result of 30 to 60 degrees. The first gap z1 between the nozzles and the second gap z2 between the respective nozzles and the object are set so that the abrasive sprayed from the first nozzle 213 and the abrasive sprayed from the second nozzle 214 can strike the object together Lt; / RTI >

10 is a schematic view showing a traveling direction of the abrasive sprayed from each nozzle having an improper placement relationship.

If z1 and z2 are not appropriate, y1 and y2 may be intersected between each nozzle and the object as shown in Fig. According to this, the abrasive sprayed along y1 may collide with the abrasive or compressed air flowing along y2 to lose the striking force. Even if the abrasive article strikes the object, the strike range is not limited to the section from the third position? To the fourth position?, But it is difficult to predict where to hit the object. Therefore, the flatness can be lowered.

If z1 is too small, the phenomenon shown in Fig. 10 occurs. If z1 is too large, a problem may occur. For example, if z1 is too large, the abrasive sprayed along the y2 from the second nozzle 214 in a state in which the abrasive sprayed along the line y1 from the first nozzle 213 strikes the object can strike a position deviating from the object have. According to this, even though the abrasive sprayed along y1 hits the object and is repelled and moves along the y2 direction again by the compressed air output along y2, the object may not be hit. On the contrary, the abrasive sprayed from the second nozzle 214 along the y2 may be struck at the position deviating from the object and obstructed at the side wall of the object after being repelled. According to this, the recycling of the abrasive sprayed along y2 is not smoothly performed, and the unintentional side wall of the object may be polished.

If z2 is too small, the abrasive sprayed from the first nozzle 213 is prevented from flowing into the y2 path after bouncing off the object, and the abrasive impinges on the body of the second nozzle 214, making it impossible to recycle the abrasive. If z2 is too small, L2 follows L1 in Fig. 8, so that when the L1 is larger than the length of the object, the abrasive sprayed from the two nozzles may not hit the object at the same time.

Conversely, if z2 is too large, the abrasive force of the abrasive decreases, and y1 and y2 may intersect with each other before they contact the object as shown in Fig.

It is preferable that the appropriate range of z1 and z2 satisfy the range in which the abrasive sprayed from the first nozzle 213 and the abrasive sprayed from the second nozzle 214 can strike the object together as described above. For example, z1 may be 50 to 300 mm, and z2 may be 100 to 140 mm.

It is preferable that the distance between each nozzle and the impact position is L2 or more on the virtual line y1 or y2 connecting the impact positions of the respective nozzles and the object. It has been experimentally confirmed that when the above conditions are satisfied, the abrasive is recycled smoothly.

11 is a flowchart showing a case manufacturing method of the present invention.

The case manufacturing method of the present invention may include a polishing step (S 510), a lamination step (S 520) and a painting step (S 530).

The grinding step S 510 is performed in such a manner that at least one existing putty layer 40 remains in the terminal case 10 painted with paint on the putty layer 40 of n (where n is a natural number of 2 or more) It may be a step of polishing the painted surface of the case 10.

The polishing step S 510 is a process performed in the sand blast part 170. The polishing step S 510 is a step in which the first nozzle 213 and the second nozzle 214 outputting the abrasive for polishing the paste or putty layer 40 are arranged to face each other (S 511) for transferring the abrasive from the first nozzle 213 to the second nozzle 214, and the terminal case 10 is transported from the first nozzle 213 toward the second nozzle 214 through the first nozzle 213 and the second nozzle 214 And a spraying process (S 512).

The stacking step S 520 may include the step of laminating the additional putty layer 40 on the existing putty layer 40 such that the putty layer 40 of the terminal case 10 satisfies n. The stacking step (S 520) may be a process performed in the putting part (130).

The painting step (S 530) may include painting the paint on the topmost additional putty layer (40). The painting unit 150 can paint the nth putty layer 40 by the process performed by the painting unit 150. [

The above-described terminal manufacturing method may be for recycling the terminal case 10 having a wrong color. It can be seen that the putter 130 and the painting unit 150 are applied as they are, except that the processing unit 110 for removing the bur from the new terminal case 10 is replaced with the sandblast unit 170. [

The transfer module 270 constituting the sand blast section 170 may extend to the putting section 130 and the painting section 150 so that the sandblast section 170 is preferably formed integrally with the processing section 110 . This is because the polishing method can be applied to remove burrs. However, the configuration and arrangement relationship of the nozzles in the sandblast unit 170 may be different from the nozzles in the processing unit 110.

In consideration of this, the processing unit 110 is applied to paint a new terminal case 10, and when the recycling terminal case 10 is processed, the processing unit 110 changes the nozzles in the processing unit 110, Lt; / RTI >

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. Accordingly, the true scope of the present invention should be determined by the following claims.

10 ... terminal case 20 ... metal area
30 ... resin region 31 ... camera hole
33 ... Lighting Hole 35 ... Speaker Hole
40 ... putty layer 50 ... paint layer
110 ... processing unit 130 ... putting unit
150 ... Painting part 170 ... Sandblast part
210 ... discharging module 211 ... first discharging module
212 ... second ejection module 213 ... first nozzle
214 ... second nozzle 230 ... compression module
250 ... receiving module 270 ... conveying module

Claims

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A compression module for generating compressed air;
A receiving module in which an abrasive is accommodated; And
And a discharge module for spraying the abrasive from the terminal case toward the painted surface on which the painting process is completed using the compressed air,
The discharge module discharges the abrasive along a third direction inclined to the painting surface,
The terminal case is transported along a first direction,
The nozzle from which the abrasive is discharged in the discharging module is disposed at the first position,
The abrasive discharged from the nozzle strikes the terminal case at a third position,
Wherein the first position and the third position are different in the first direction.

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A compression module for generating compressed air;
A receiving module in which an abrasive is accommodated; And
And a discharge module for spraying the abrasive from the terminal case toward the painted surface on which the painting process is completed using the compressed air,
The discharge module discharges the abrasive along a third direction inclined to the painting surface,
And a transfer module for transferring the terminal case to the discharge module in a first direction,
A plurality of nozzles through which the abrasive is discharged are provided in the discharge module along a second direction perpendicular to the first direction,
Wherein the discharge module reciprocates linearly along the second direction,
The third direction being perpendicular to the second direction and being inclined in the first direction,
Wherein the plurality of nozzles are arranged at equal intervals in an installation area longer than the length of the terminal case in the second direction,
Wherein the linear reciprocation range of the discharge module is determined to be equal to or greater than a distance between the nozzles and within a range that is equal to or smaller than a difference in length between the installation area and the terminal case in the second direction.

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A compression module for generating compressed air;
A receiving module in which an abrasive is accommodated; And
And a discharge module for spraying the abrasive from the terminal case toward the painted surface on which the painting process is completed using the compressed air,
The discharge module discharges the abrasive along a third direction inclined to the painting surface,
Wherein the discharging module includes a first discharging module disposed at a first position and a second discharging module disposed at a second position,
The abrasive discharged from the first discharge module strikes the terminal case at a third position,
The abrasive discharged from the second discharge module strikes the terminal case at the fourth position,
Wherein the first position, the third position, the fourth position, and the second position are arranged in order at different positions on the longitudinal direction of the terminal case.

10. The method of claim 9,
And the distance between the third position and the fourth position is shorter than the length of the terminal case.

6. The method of claim 5,
Wherein the discharge module includes a first nozzle and a second nozzle which are disposed apart from each other along the longitudinal direction of the object and in which the abrasive is sprayed toward the object,
Wherein the first nozzle and the second nozzle are formed to face each other at an oblique angle.

12. The method of claim 11,
Wherein the ejecting direction of the first nozzle and the ejecting direction of the second nozzle are in a line-symmetrical relationship with the axis of symmetry being an orthogonal line orthogonal to the processing surface of the object.

12. The method of claim 11,
The first nozzle injects the abrasive along a first imaginary line,
The second nozzle injects the abrasive along a second imaginary line,
The first virtual line and the second virtual line meet with each other at a specific point,
Wherein the object is disposed between the specific point and the first nozzle, or disposed between the specific point and the second nozzle.

12. The method of claim 11,
Wherein an inclination angle between each of the nozzles and the object is between 30 degrees and 60 degrees,
Wherein a first gap between each of the nozzles and a second gap between each of the nozzles and the object is determined within a range in which the abrasive jetted from the first nozzle and the abrasive jetted from the second nozzle can strike the object together Case manufacturing apparatus.

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