KR101157944B1 - Manufacturing method of self for refrigerator - Google Patents

Abstract

The present invention relates to a method for manufacturing a glass shelf mounted in a refrigerator. More particularly, the present invention relates to a method for manufacturing a shelf for a refrigerator, which saves mold cost by producing resins molded into edges of tempered glass up and down. Invention.
Method of manufacturing a shelf for a refrigerator of the present invention The invention, the step of mounting the state and the lower state (Upper and Lower Jig) of the vibration welding machine, respectively, and setting the plate glass is located between the state and the lower state; Wherein the state and the state of contact with the state to form a fusion protrusion in any one of the state and the state, the binding step of combining the state and the state by melting the fusion protrusion by pressing while giving a vibration by operating the vibration welding machine; And a take-out step of raising the upper jig and taking out the bound shelf after cooling the upper jig of the vibration welding machine stopped at the bottom dead center.

Description

Manufacturing method of shelf for refrigerator {MANUFACTURING METHOD OF SELF FOR REFRIGERATOR}

The present invention relates to a method for manufacturing a glass shelf mounted in a refrigerator. More particularly, the present invention relates to a method for manufacturing a shelf for a refrigerator, which saves mold cost by producing resins molded into edges of tempered glass up and down. Invention.

The shelf, a partition that holds items stored inside the refrigerator, was initially used for a long time with a light and inexpensive rubber or resin-coated wire mesh. Enclosed partitions have been developed to prevent broths from flowing from the food stored in the lower compartment.In the early days, some shelves with resin or coated wooden boards were used, but glass shelves with good design are now prevalent. I have reached the stage.

The glass shelf is made of a resin for molding a frame of tempered glass and a frame of a tempered glass transversely transversely inside the refrigerator, according to a mold for manufacturing a glass shelf of a refrigerator, which is patented by the applicant, (see Patent Document 1). For this purpose, the glass is placed in a mold in which the entire glass shelf is accommodated, and a method of injecting and solidifying the resin by injecting the resin into a cavity of the mold is adopted.

Molding method using the above mold requires a large mold, the mold is economically lower due to the exponential increase in cost according to the specification, especially when the glass is seated on a metal mold, and the resin is molded When torsion while solidifying has a problem that is easily broken during production or use.

More advanced invention has a glass shelf coupling structure (see Patent Document 2) of the refrigerator, which is, as shown in Figure 6, the glass plate 640 for supporting the object stored in the refrigerator; An upper frame 620 for preventing the flow of the glass plate; A lower frame 625 supporting the glass plate; A fusion means 642 installed at an outer circumference of the glass plate to couple the glass plate and the upper and lower frames; And it is composed of a coupling means (S) for coupling the upper and lower frames, it is characterized in that the upper and lower frames and the glass plate is bonded by fusion means by heating at a predetermined temperature after assembly.

The conventional design has not been put to practical use despite the advantage of not using an expensive mold because it is a prefabricated structure, which is complicated by the structure of the upper and lower frames 620 and 625, and the manufacturing process is complicated. This is because the durability is poor enough to bear the load of food that is placed on the shelf together.

Another advanced technique is the invention of an integrated shelf of a refrigerator (see Patent Document 3), which includes a lower shelf 722 on which glass is seated inside, as shown in FIG. 7; It is formed integrally with the bottom of the shelf, and consists of a shelf upper portion 720 which is fixed to the bottom of the shelf by the ultrasonic fusion machine 710 in an inwardly folded state in close contact with the upper surface of the seated glass, the shelf upper portion 720 A fusion protrusion 724 is formed to melt between the upper and lower shelves 720 and 722 while melting by the ultrasonic welding machine 710.

The ultrasonic welding method is the most advanced method, but in order to weld the square front edges, a plurality of welding protrusions 724, ... must be formed, and for each of them, an ultrasonic vibrator for ultrasonic vibration is provided. In the case of installing the vibrator, there are many technical problems such as partial fusion or pressing if the installation height and supply potential are not appropriate. If the fusion protrusion 724 is formed in a sharp shape to be dissolved by ultrasonic vibration, the fusion strength is incompletely coupled. Problems such as this occur.

Although described above as fusion, it can be referred to as welding in terms of melting one material and attaching it to another part, so that fusion is described below with the concept of welding.

Document 1; Patent application No. 2007-133380 (filed December 18, 2007) Document 2; Patent No. 10-0547423 (Registration date January 23, 2006) Document 3; Patent No. 10-0199397 (Registration date March 04, 1999)

The present inventors have carefully observed and studied the problems of the above-described conventional inventions, and as a result, have completed the present invention. The method of manufacturing a shelf for a refrigerator according to the present invention, while obtaining a prefabricated manufacturing method, obtains sufficient binding force and support force such as molding. It can be completed, with the aim of providing a manufacturing method suitable for mass production while saving manufacturing costs by not requiring a large mold.

In addition, the invention of the manufacturing method of the refrigerator shelf of the present invention, there is no torsion during the solidification after fabrication, it is possible to increase the durability while maintaining the design strength sufficiently, various types of projections can be used to secure sufficient fusion area to increase the adhesive strength It also has other objectives to improve sealing while reducing material costs.

Method for manufacturing a shelf for a refrigerator of the present invention in order to solve the above problems, the setting step of mounting the state and the lower state in the upper and lower jig (Upper and Lower Jig) of the vibration welding machine, respectively, and the plate glass is positioned between the state and the lower state ; Wherein the state and the state of contact with the state to form a fusion protrusion in any one of the state and the state, the binding step of combining the state and the state by melting the fusion protrusion by pressing while giving a vibration by operating the vibration welding machine; After the upper jig of the vibration fusion machine is stopped at the bottom dead center cooling, taking out the upper jig and take out the bound shelf;

Further, in addition to the above-described process, recesses are respectively formed in the regions adjacent to the portions in contact with the plate glass of the state and the state, and after the setting step, a liquid phase is formed in any one of the state and the state of the state. It is preferable to characterize that the process proceeds to the binding step through the injection step of injecting silicon rubber.

Further, in the above process, it is more preferable that the blocking rib is formed in any one of the recessed state of the state and the state in which the liquid silicon rubber is injected.

Further, in the above process, it is more preferable that the glass guide ribs are formed in any one of the above conditions and conditions.

In the above configuration, the fusion protrusion is more preferably formed to be in the form of any one of a triangle, a square, a trapezoid, a circle and an ellipse in the longitudinal cross section.

In addition, the vibration of the upper jig of the vibrating fusion machine in the binding step is more preferably initially reduced to gradually reduce the amplitude of the end of the binding step is characterized in that the zero (stop).

Method of manufacturing a shelf for a refrigerator of the present invention The invention is a useful invention suitable for mass production while producing a prefabricated, sufficient binding force and support can be obtained, such as molding, and does not require a large mold, saving production costs.

In addition, the invention of the manufacturing method of the refrigerator shelf of the present invention, there is no torsion during the solidification after fabrication, it is possible to increase the durability while maintaining the design strength sufficiently, various types of projections can be used to secure sufficient fusion area to increase the adhesive strength It is an effective invention that can improve the sealing force while reducing the material cost.

1 is a basic and additional process of the invention manufacturing method of the shelf for a refrigerator of the present invention,
2 is an exploded state diagram of a shelf for a refrigerator of the present invention;
3 is a cross-sectional view of each part of the coupling state of FIG.
4 is an exploded cross-sectional view of the main portion of the present invention;
5 is an operational state diagram of the present invention,
6 is an exploded cross-sectional view of a configuration state of the related art;
7 is a cross-sectional view of a configuration of another conventional invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the accompanying drawings.

Figure 1a is a basic process diagram of the manufacturing method of the refrigerator shelf of the present invention, Figure 2 is an exploded state of the refrigerator shelf of the present invention, Figure 3a and Figure 3b is a combination of Figure 2 in the AA and BB line 4 is an enlarged cross-sectional view showing an extract of the main part of the present invention, and FIG. 5B is an operation diagram showing the operation of the upper and lower legs of the vibration welding machine.

Referring to Figure 1a, the method of manufacturing a shelf for a refrigerator of the present invention, the first step of performing a setting step (S1), the vibration using a vibration welding machine (not shown) to impart a pressing force in the vertical direction and the vibration in the horizontal direction In the upper and lower legs 51 and 52 (see FIG. 5B) of the fusion machine, the state 1 and the lower state 2 are respectively mounted, and the plate glass 3 is positioned between the upper and lower states 2 and 2. .

At this time, the state (1) and the lower state (2) abuts the surface where the fusion projections 21 are used in any one of the state (1) and lower state (2) (dotted line in Fig. 3a, b), fusion When the projection 21 is operated by vibrating fusion splicer and pressurized while vibrating, the fusion projection 21 is melted by frictional heat to function as an adhesive that bonds abutting surface between the state 1 and the lower part 2 (FIG. 4, 5a).

Next, proceed to the binding step (S3) to operate the vibration welding machine while the upper glass jig 51 vibrates from side to side while the plate glass (3) is pinched (see Fig. 5b) by rubbing the fusion projections 21 by friction heat to the fusion projections (21) is melt | dissolved and the state (1) and the lower limb (2) are bound.

 Finally, take-out step (S4) proceeds, which is cooled after the upper jig 51 of the vibration welding machine (1) is stopped at the bottom dead center (this state is pressurized to a constant pressure), the upper jig 51 The finished shelf may be taken out by a worker by hand, but it is preferable to take it out with a mechanical device from the viewpoint of mass production automation.

The plate glass (3), which is a plate glass made of tempered glass through the setting step (S1)-> binding step (S3)-> take-out step (S4), is coated with a resin having a predetermined shape on its edge. The state (1) and the lower part 2 are made of the same material, and the fusion protrusion 21 is also made of the same material, so that the fusion protrusion 21 is melted to integrate the upper and lower states 1 and 2. It is possible to complete a lathe that is equivalent to molding and mounting to a mold.

At this time, the standard of the shelf is produced in various forms according to the specification and internal structure of the refrigerator, for example, in the conventional ultrasonic fusion method, the upper and lower jigs installed with a plurality of ultrasonic generators of six or more sets to be replaced with other types of shelf production In contrast, in the vibration welding method of the present invention, since the upper and lower shanks 51 and 52 are inexpensive and simple to use, the production cost can be significantly reduced.

In FIGS. 2 and 3, the shelves are mounted in the refrigerator, and in FIG. 4, the shelves are set in a vibrating welding machine (not shown), and are shown in an inverted state. However, the shelves are straight. You may manufacture in a state (state shown in FIGS. 2 and 3).

1B is another process diagram of the manufacturing method of the shelf for a refrigerator of the present invention, and FIG. 5A shows an applicator 41 for applying the silicone rubber 4 in a state in which the state 1 is seated on the leg rest 52. It is an operation diagram which shows the operating state typically.

Referring to Figure 1b, another configuration of the present invention is to consist of a setting step (S1)-> injection step (S2)-> binding step (S3)-> takeout step (S4), binding step (S3) Is interposed between the setting step (S1) and the binding step (S3) and the recessed part 13 is formed in each of the areas adjacent to the part in contact with the plate glass 3 of the state (1) and the state (2) and the By injecting the liquid silicone rubber 4 into the indentation 13 of one of the indentations 13 through the applicator 41 (FIG. 5A state), the liquid silicone rubber 4 solidifies and the indentation portion. While sticking to (13), the gap that may exist between the state (1) or the state (2) and the plate glass (3) is made perfect sealing.

At this time, the silicone rubber 4 is injected into the liquid phase to coagulate, and thus the silicone cavity 4 should be injected into the concave inlet 13 located below, so that the silicone rubber 4 can be solidified in a fixed position. (Not shown) (usually, by forming the fusion protrusion 21 on the lower side 2 side, the lower side 2 is placed on the upper jig 51 of the vibration welding machine to impart vibration). Injecting into the inlet 13 of the state (1) (but the figure shown is inverted, set, injected, manufactured and inverted and positioned upside) and vice versa (2) It may be injected into the indentation part of.

In addition, if the liquid silicone rubber 4 flows between the state 1 and the lower state 2 before the solidification, the frictional resistance is reduced, thereby inhibiting the generation of sufficient frictional heat to melt the fusion protrusion 21, and furthermore, the fusion protrusion. Even if (21) is melted, the liquid silicone rubber 4 interposed in the state (1) and the inferior state (2) may interfere with the adhesion between the state (1) and the inferior state (2) and thereby change the adhesive force. In another configuration, in the injection step S2, the blocking rib 11 is formed in one of the recesses 13 of the state 1 and the lower state 2 in which the liquid silicon rubber 4 is injected, thereby forming the liquid silicon rubber ( 4) is preferable because it can block the flow between the state (1) and the lower part (2), and in particular, by reducing the area of the concave portion 13 can reduce the injection amount of the silicon rubber (4) to reduce the material cost It becomes possible.

In addition, the silicon rubber 4 is preferably applied by automating and applying, for example, using a device such as a liquid quantitative spreader, which always injects an appropriate amount in a short time and does not interfere with mass production at all.

In still another configuration of the present invention, the glass guide ribs 12 are formed in any one of the state 1 and the state 2 so that the position of the plate glass 3, which is tempered glass, can be easily found and settled. It can shorten the production time and contribute greatly to mass production.

The fusion protrusion 21, which is an essential part of the present invention, is to melt and bond the state 1 and the lower state 2, so that the melting speed may vary depending on the shape thereof. It is possible to optimize the production time and the adhesive strength, preferably to a triangle, a square, a trapezoid, a circle, an oval or the like on the longitudinal cross-section (in FIG. 3 by way of example trapezoid, circle).

In addition, the vibration of the upper jig 51 of the vibration fusion splicer in the binding step (S3) to the first maximum and gradually reduced so that the end of the binding step (S3) end is more preferably the amplitude (zero), but first When melting the fusion projections 21, a large amount of heat energy is consumed, but even slightly melted, it becomes more and more easy to melt, so as to reduce the amplitude to match the heat of fusion of the fusion projections 21, moreover, the fusion projections 21 are completely dissolved After that, it is necessary to stop at the correct position so that the state (1) and the state (2) are matched to gradually reduce the vibration so that the boil (終 期) is critical to zero.

In the drawing, reference numeral 22 denotes a slide groove, and the slide mechanism installed on the wall surface of the refrigerator is inserted into the slide groove 22 when the shelf is moved forward or backward.

Example  One

The refrigerator shelf of the present invention was manufactured under the following conditions using a vibrating fusion machine (DAEYOUNG 630e) of Daeyoung Ultrasonics.

(1) The fusion protrusions 21 were formed in a trapezoidal cross section having a maximum width of 1 mm and a height of 1 mm.

(2) The liquid silicone rubber 4 was injected to have a thickness of 2 mm or more between the blocking rib 11 formed in the recess 13 in the state (1) and the back surface of the plate glass 3.

③ The frequency of the vibration welding machine was 230 times / second.

(4) A 12 mm operation was carried out with an amplitude of 1.2 mm at a pressing force of 500 kg / cm 2 for 1 mm forward reduction.

⑤ It was taken out after cooling under the same pressure.

⑥ In the same process, three sets of test shelves were manufactured.

Example  2

The same conditions as in Example 1 were used, except that conditions ④ were as follows.

④ '0.3 mm at 1.5 mm amplitude at a pressing force of 500 kg / cm 2, 0.2 mm at 1.2 mm amplitude at a pressure of 450 kg / cm 2, and 0.1 mm at 1.0 mm of amplitude at 500 kg / cm 2 of pressing force. Was pressed, and 0.4 mm was pushed forward with an amplitude of 0 at an applied pressure of 250 kg / cm 2.

Test Example  1 (confidential test)

Six sets of test shelves produced in the examples were installed at four points each of two slide grooves 22 and 22 on both sides, and water was poured on the upper surface of the plate glass 3, and left for 24 hours to perform an airtight test. .

The results are shown in Table 1.

Test Example  2 (destruction test)

In the state in which 6 sets of test shelves manufactured in the example were installed and supported as in Test Example 1, the distribution load was gradually increased only to the plate glass 3, and the fracture test was performed.

The results are shown in Table 1.

Confidentiality test (24 hours maintenance) Fracture test (load kg) Remarks
Example 1
Trial 1 ○ 557 Plate glass destruction Prototype 2 ○ 512 Plate glass destruction Prototype 3 ○ 508 Attachment part separation
Example 2
Prototype 4 ○ 523 Plate glass destruction Prototype 5 ○ 560 Plate glass destruction Prototype 6 ○ 532 Plate glass destruction

In the airtight test, there were no leaks in all of the prototypes, and in the fracture test, only the prototype 3 had an attachment part at a load of 508 kg, but the rest of the glass plate 3, which was tempered glass, was destroyed. The adhesion strength proved to be sufficient.

As described above, for example, a method of manufacturing a shelf for a refrigerator according to the present invention has been described in detail, but this example is one of various embodiments that can be implemented within the scope of the present invention. Modifications are possible and all such changes are considered to be included within the scope of the technical idea of the present invention.

S1: setting step S2: injection step
S3: binding step S4: take out step
1: Status
11: blocking rib 12: glass guide rib
13: concave part
2: Hatae
21: fusion protrusion 22: slide groove
3: plate glass
4: Silicon Raver
41: applicator
51: upper jig (of vibration welding machine)
52: Lower Jig
620: upper frame 625: lower frame
640: glass plate 642: epoxy tape (fusion means)
710: ultrasonic welding machine 720: upper shelf
722: lower shelf 724: fusion protrusion
S: Joining means

Claims (6)

A setting step of mounting a state and a state in the upper and lower jigs of the vibrating welding machine, respectively, and allowing the pane to be positioned between the state and the lower state;
In this case, the fusion protrusion is formed on any one of the state and the state on the surface where the state and the state contact.
A binding step of operating the vibrating fusion machine to pressurize while vibrating to melt the fusion protrusion to combine the state and the state;
After taking out the upper jig of the vibration fusion machine is stopped at the bottom dead center, take out the upper jig and take out the bound shelf;
Method of manufacturing a shelf for a refrigerator. The method of claim 1,
Concave portions are formed in the areas adjacent to the parts in contact with the glass plate of the state and the lower state, and after the setting step, the concave portion is injected through an injection step of injecting a liquid silicon labyrinth into the indented portion of the state and the lower state. Method of manufacturing a shelf for a refrigerator, characterized in that to proceed to the step. The method of claim 2,
Method of manufacturing a shelf for a refrigerator, characterized in that the blocking rib is formed in any one of the recessed state of the state and the state in which the liquid silicone rubber is injected. 3. The method according to claim 1 or 2,
Method of manufacturing a shelf for a refrigerator, characterized in that the glass guide rib is formed in any one of the above state and condition. 3. The method according to claim 1 or 2,
The fusion projection is a manufacturing method of a shelf for a refrigerator, characterized in that formed in the shape of any one of a triangular, square, trapezoidal, circular, elliptical in the longitudinal cross-section. 3. The method according to claim 1 or 2,
The vibration of the upper jig of the vibrating fusion machine in the binding step is initially maximized and gradually reduced so that the amplitude is zero (stop) at the end of the binding step.

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