KR102411319B1 - A shock absorbing member and a manufacturing method thereof - Google Patents

Abstract

One aspect of the present invention is provided, comprising: a first part including a first panel including a first through hole at both ends, and a first bridge constituting a part of the first panel and including one or more protrusions; and a second portion including a second panel including a second through hole at both ends, and a second bridge constituting a portion of the second panel and including one or more indentations; The hardness of the side wall of the through hole is greater than the hardness of the region excluding the side wall, and the side wall of the first through hole in the first part and the area excluding the side wall are integrally made of the same type of foam, and the second through hole in the second part The side wall and the region excluding the side wall are integrally made of the same type of foam, and the protrusion and the concave portion are fitted to provide a shock-absorbing member and a method for manufacturing the same.

Description

Shock-absorbing member and manufacturing method thereof

The present invention relates to a shock-absorbing member and a method for manufacturing the same.

In general, packaging materials are materials or containers used for product packaging, and are used for the purpose of protecting the value and condition of products or preserving quality in the process of transportation, storage, handling, and use of products. .

Packaging materials are formed of various materials depending on the material, shape, size, weight, economic feasibility, and transport method of the product. For example, paper, wood, plastic, leather, cloth, metal, etc. are used as a material of a packaging material.

Among them, expanded plastics are formed to have a fine bubble-like structure inside the plastic by a foaming agent, and are widely used as packaging materials because of their excellent lightness and cushioning properties. Representative foamable plastics include expanded polystyrene (EPS), expanded polyethylene (EPE), and expanded polypropylene (EPP).

In particular, a packaging box for safely transporting home appliances such as washing machines, refrigerators, air conditioners, TVs, and AV systems without damage includes an outer box provided with an opening and closing cover for storing or taking out products at the upper and lower sides, and the outside and a cushioning member that is filled in the space between the inner surface and the outer surface of the stored product in the box to cushion or block the shaking of the stored product in the outer box or transmission of an external shock.

The outer box is manufactured using corrugated cardboard or wood, and the cushioning member includes a pair of upper and lower cushioning members installed on the upper and lower portions of the stored product inside the outer box to support the load of the stored product, and the outer box It consists of a plurality of side cushioning members that are respectively installed on the four sides of the housed product from the inside to protect the four sides of the housed product, and are mainly made of foamed plastic to protect the housed product.

Such a buffer member may be disposed to surround the product to protect the product from external impact, or may be disposed on the lower surface and side portions of the product to support the shaking and load of the product.

However, since the conventional foamable type buffer member is molded in a structure that covers the part that needs to be packaged using a mold, it is highly likely that not only the part that needs to be packaged but the part that does not need packaging of the product will be packaged together. If the foaming type cushioning member is molded in a structure that covers only the part that needs packaging of the product, the mold structure becomes very complicated, so there is a disadvantage in that the mold cost significantly increases.

On the other hand, in recent years, a foamable type cushioning member has been developed in which a separate reinforcing structure or reinforcing member is added to a region where a product load or external impact is concentrated. For example, Korean Patent Application Laid-Open No. 10-2016-0123836 discloses a technique for forming a portion that receives a lot of load of a home appliance to have a higher density than other portions. However, if a separate reinforcing member is added to the foamable-type cushioning member or the material of the cushioning member is formed differently depending on the location of the product, the manufacturing cost of the foamable-type cushioning member increases, and the manufacturing process of the foamable-type cushioning member There are additional disadvantages to this.

The present invention is to solve the problems of the prior art described above, and an object of the present invention is to reduce the manufacturing process and the resulting manufacturing cost, and at the same time to facilitate storage, transportation, assembly, disassembly, and disposal, and the load applied from the product An object of the present invention is to provide a shock-absorbing member capable of preventing local damage due to the deviation of the .

One aspect of the present invention includes: a first part including a first panel including a first through hole at both ends, and a first bridge constituting a part of the first panel and including one or more protrusions; and a second portion including a second panel including a second through hole at both ends, and a second bridge constituting a part of the second panel and including one or more indentations; The hardness of the side wall of the through hole is greater than the hardness of the region excluding the side wall, and the side wall of the first through hole in the first part and the area excluding the side wall are integrally made of the same foam, and the second through hole in the second part The side wall and the region other than the side wall are integrally made of the same type of foam, and provide a shock-absorbing member to which the protrusion and the concave portion are fitted.

In one embodiment, the protrusion may include two or more protrusions, and the concave portion may include two or more through-holes corresponding to the cross-section of the protrusions.

In one embodiment, the cross-section of the protrusion and the concave portion may be one selected from the group consisting of a circle, an ellipse, a polygon, and a combination of two or more thereof.

In one embodiment, the type A durometer hardness of the sidewalls of the first and second through holes may be 70-100.

In an embodiment, the hardness of the Type A durometer in the region excluding the sidewall may be 40-60.

In one embodiment, the first and second parts may be made of the same type of foam.

In one embodiment, the foam may include polypropylene.

In an embodiment, the protrusion of the first portion and the concave portion of the second portion may be fitted to form an “H” shape of the shock-absorbing member.

In an embodiment, the protrusion of the first portion and the concave portion of the second portion may be fitted to form an “X” shape of the shock-absorbing member.

In another aspect of the present invention, in the method of manufacturing the shock-absorbing member, (a) a first region in contact with the sidewalls of the first and second through holes, and a second region in contact with a region excluding the sidewall designing and manufacturing a mold comprising; (b) preparing the first and second parts by injecting and foaming a foaming resin into the mold; and (c) fitting the first and second parts together, wherein the first and second regions in the mold are made of metals having different thermal conductivity.

The shock-absorbing member according to an aspect of the present invention can be applied in a shape of selectively packaging a part requiring packaging and shock-absorbing of a product by simply assembling two or more pieces, and each Because the piece can be easily disassembled, it is easy to store, transport and dispose of.

In addition, by applying a metal having a partially different thermal conductivity to a mold for manufacturing the shock-absorbing member, each piece (the first and second parts) constituting the shock-absorbing member has the same, specifically, physical properties It can be formed integrally with the same foam, and by relatively increasing the hardness of the part to which a large load is applied compared to other parts, such as the part where the pedestal of the product is inserted and fixed among the shock-absorbing members, damage can be prevented.

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a schematic diagram of first and second parts of a shock-absorbing member having an “H” shape according to an embodiment of the present invention.
2 is a schematic view of a shock-absorbing member having an "H" shape according to an embodiment of the present invention.
3 is a cross-sectional view of the shock-absorbing member viewed from the direction A of FIG.
Figure 4 is a schematic view of the first and second parts of the shock-absorbing member having an "X" shape according to an embodiment of the present invention.
5 is a schematic view of a shock-absorbing member having an "X" shape according to an embodiment of the present invention.
6 is a cross-sectional view of the shock-absorbing member viewed in the A and B directions of FIG. 5 .

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is "connected" with another part, this includes not only the case where it is "directly connected" but also the case where it is "indirectly connected" with another member interposed therebetween. . In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

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

1 and 4 are schematic views of a shock-absorbing member according to an embodiment of the present invention, respectively.

1 and 4 , the shock-absorbing member according to an aspect of the present invention includes a first panel 110 including first through-holes 111 at both ends, and a part of the first panel 110 . a first portion 100 comprising a first bridge 120 constituting the . and a second panel 210 including a second through hole 211 at both ends, and a second bridge 220 constituting a part of the second panel 210 and including one or more concave portions 221 and 222 . ) including a second portion 200; including, the hardness of the sidewalls 112 and 212 of the first and second through holes is greater than the hardness of the region excluding the sidewalls 112 and 212, and the first In the portion 100, the sidewall 112 of the first through hole and the region excluding the sidewall are integrally made of the same type of foam, and in the second portion 200, the sidewall 212 of the second through hole and the sidewall are excluded. The region may be integrally made of the same type of foam, and the protrusions 121 and 122 and the concave portions 221 and 222 may be fitted.

The protrusions 121 and 122 may include two or more protrusions, and the concave portions 221 and 222 may include two or more through-holes corresponding to the cross-sections of the protrusions. The cross-section of the protrusion and the concave portion may be one selected from the group consisting of a circle, an ellipse, a polygon, and a combination of two or more thereof.

For example, when the cross-sections of the protrusion and the concave portion are all circular, and the number is small, the position and size of the protrusion and the concave portion are adjusted so that a required level of fixing force can be realized between the first and second portions 100 and 200 . can In addition, a gap between the first and second portions 100 and 200 may be prevented by adjusting the cross-sectional shapes of the protrusion and the concave portion to be different, for example, a combination of a circle and an ellipse.

The hardness of the sidewalls 112 and 212 of the first and second through holes may be greater than that of a region excluding the sidewalls 112 and 212 . For example, the type A durometer (GS-706N, JIS K 6301 A) hardness of the sidewalls 112 and 212 of the first and second through holes may be 70-100. If the type A durometer hardness of the sidewalls 112 and 212 of the first and second through holes is less than 70, to prevent damage to parts to which a greater load is applied compared to other parts, such as the part where the pedestal of the product is inserted and fixed. It is difficult, and if it exceeds 100, the surface becomes excessively hard, making it difficult to buffer external impact.

The hardness of the type A durometer (GS-706N, JIS K 6301 A) in the region excluding the sidewall may be 40 to 60. If the hardness of the Type A durometer in the region excluding the sidewall is less than 40, the shock-absorbing member may be easily damaged even by a small impact, and if it exceeds 60, the surface to which a small load is generally applied becomes excessively hard, making it difficult to buffer external impact.

In addition, the difference between the hardness of the sidewalls 112 and 212 of the first and second through holes and the type A durometer (GS-706N, JIS K 6301 A) in an area excluding the sidewall may be 10-50. If the difference in hardness is less than 10, it is difficult to prevent damage to parts to which a large load is applied compared to other parts, such as the part where the pedestal of the product is inserted and fixed. , there is a problem in that it is difficult to control the difference in hardness for each region to more than 50 in the shock-absorbing member integrally formed of the same material.

In the first portion 100, the sidewall 112 of the first through hole and the region excluding the sidewall are integrally made of the same type of foam, and in the second portion 200, the sidewall 212 of the second through hole and the Regions other than the sidewalls may be integrally formed of the same foam. The foam is, for example, one selected from the group consisting of expanded polystyrene (EPS), expanded polyethylene (EPE, expanded polyethylene), expanded polypropylene (EPP, expanded polypropylene), and combinations of two or more thereof, preferably may be expanded polypropylene, but is not limited thereto.

The first and second parts 100 and 200 may be made of a foam of the same type, and the foam is, for example, expanded polystyrene (EPS), expanded polyethylene (EPE, expanded polyethylene), and expanded polypropylene. (EPP, expanded polypropylene) and one selected from the group consisting of a combination of two or more thereof, preferably, may be expanded polypropylene, but is not limited thereto.

The protrusions 121 and 122 and the concave portions 221 and 222 may be fitted. As used herein, the term "fitting coupling" may be interpreted as a coupling method using a tolerance between the concave portion, which is a hole to be fitted, and the protrusion, which is an axis.

The shock-absorbing member may be applied to a lower portion of a home appliance such as a washing machine, a refrigerator, an air conditioner, a TV, or an AV system in a state in which the first and second parts 100 and 200 are coupled to each other. That is, the shock-absorbing member can be applied in a shape of selectively packaging the product packaging and shock-absorbing parts by simply assembling the first and second parts 100 and 200 in a fitting manner, and before application / Since each of the first and second parts 100 and 200 can be easily disassembled later, storage, transportation, and disposal are easy.

2 is a schematic diagram of a shock-absorbing member having an “H” shape according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of the shock-absorbing member viewed from the direction A of FIG. 2 .

2 and 3 , the protrusions 121 and 122 of the first part 100 and the indentations 221 and 222 of the second part 200 are fitted to form the shock-absorbing member It can form an "H".

The first part 100 includes a first panel 110 including a first through hole 111 at both ends, and one or more protrusions 121 extending from a side of the first panel 110 in a vertical direction. , may include a first bridge 120 including 122). In addition, the second part 200 is formed to extend in a vertical direction from the side of the second panel 210 and the second panel 210 including second through holes 211 at both ends, and one or more recesses. It may include a second bridge 220 including mouths 221 and 222 .

One or more protrusions 121 and 122 formed on the first bridge 120 and one or more concave portions 221 and 222 formed on the second bridge 220 are coupled to each other to form an “H” impact A cushioning member may be constituted.

5 is a schematic view of a shock-absorbing member having an “X” shape according to an embodiment of the present invention, and FIG. 6 is a cross-sectional view of the shock-absorbing member viewed from the A and B directions of FIG. 5 .

5 and 6 , the protrusion of the first portion and the concave portion of the second portion may be fitted to form an “X” shape of the shock-absorbing member.

The first part 100 is formed in a first panel 110 including a first through hole 111 at both ends, and at the center of the first panel 110 , and includes one or more protrusions 121 and 122 . It may include a first bridge 120 that includes. In addition, the second part 200 is formed in a second panel 210 including a second through hole 211 at both ends, and a central portion of the second panel 210, and one or more concave portions 221, It may include a second bridge 220 including 222).

One or more protrusions 121 and 122 formed on the first bridge 120 and one or more concave portions 221 and 222 formed on the second bridge 220 are coupled to each other to form an “X” impact A cushioning member may be constituted.

Meanwhile, referring to FIGS. 3 and 6 , steps 123 and 223 may be formed on at least some of the first and second bridges among the first and second parts, respectively.

When the shock-absorbing member has an “H” shape, the steps 123 and 223 may be formed on a portion of an upper surface of the first bridge 120 and a portion of a lower surface of the second bridge 220 , respectively. . During fitting, the stepped 123 formed on the upper surface of the first bridge 120 may come into contact with the end of the second bridge 220 , and the stepped 223 formed on the lower surface of the second bridge 220 . may be in contact with the end of the first bridge 120 .

When the shock-absorbing member has an "X" shape, the steps 123 and 223 are formed in the first panel 110 and the first bridge 120 in the first and second parts 100 and 200, respectively; and a boundary dividing the second panel 210 and the second bridge 220 may be formed. At the time of fitting, the two steps 123 formed on the upper surface of the first bridge 120 may come into contact with the side portions of the second bridge 220, respectively, and 2 formed on the lower surface of the second bridge 220 The step 223 of the dog may be in contact with the side of the first bridge 120 .

The steps 123 and 223 prevent gaps and/or steps between the first and second parts 100 and 200 in a state in which the first and second parts 100 and 200 are fitted to each other to prevent a gap between them. It is possible to improve not only bonding strength and fixing strength, but also fixing strength and shock-absorbing effect on the product.

In another aspect of the present invention, in the method of manufacturing the shock-absorbing member, (a) a first region in contact with the sidewalls of the first and second through holes, and a second region in contact with a region excluding the sidewall designing and manufacturing a mold comprising; (b) preparing the first and second parts by injecting and foaming a foaming resin into the mold; and (c) fitting the first and second parts together, wherein the first and second regions in the mold are made of metals having different thermal conductivity.

The material of the mold in step (a), specifically, the material of the mold in contact with the foamable resin is iron, copper, tin, zinc, magnesium, aluminum, brass (for example, 70% by weight of copper and 30% by weight of zinc) %), stainless steel, and a combination of two or more thereof.

In addition, in the mold, the first and second regions may be made of metals having different thermal conductivity, and preferably, the thermal conductivity of the first region may be smaller than that of the second region. In this way, by applying metals having different thermal conductivity to the first and second regions, each piece (the first and second parts) constituting the shock-absorbing member is formed of the same foam, specifically, with the same physical properties. It can be formed integrally with the shock absorbing member, and by relatively increasing the hardness of the part to which a large load is applied compared to other parts, such as the part where the product pedestal is inserted and fixed, it prevents damage due to the deviation of the load. can do.

The second region is made of aluminum (thermal conductivity: 196 kcal/℃), and the first region is made of a metal having a lower thermal conductivity than the second region, for example, brass (thermal conductivity: 95 kcal/℃). By a single foaming process using the same type of foamable resin, the hardness of the sidewalls 112 and 212 of the first and second through holes that are foam-molded in the second region can be adjusted to be higher than that of other regions. .

The hardness of the sidewalls 112 and 212 of the first and second through holes and the hardness of the region excluding the sidewalls 112 and 212 are the same as described above.

The above description of the present invention is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: Part 1
110: first panel
111: first through hole
112: side wall
120: first bridge
121, 122, protrusion
123: step
200: Part 2
210: second panel
211: second hole
212: side wall
220: second bridge
221, 222: concave inlet
223: step

Claims (10)

a first portion comprising a first panel including a first through hole at both ends, and a first bridge constituting a portion of the first panel and including one or more protrusions; and
In the shock-absorbing member comprising a; a second panel including a second through-hole at both ends, and a second part that forms a part of the second panel and includes a second bridge including one or more recessed portions,
The hardness of the sidewalls of the first and second through holes into which the pedestal of the product is inserted and fixed is greater than the hardness of the region excluding the sidewall,
The type A durometer hardness of the sidewalls of the first and second through holes is 70-100,
Type A durometer hardness of the region excluding the side wall is 40-60,
In the first part, the sidewall of the first through hole and the area excluding the sidewall are integrally made of the same type of foam by a single foaming process using the same type of foaming resin,
In the second part, the side wall of the second through hole and the area excluding the side wall are integrally formed with the same type of foam by a single foaming process using the same type of foaming resin,
The protrusion and the concave portion are fitted,
The shock-absorbing member,
(a) designing and manufacturing a mold including a first region in contact with the sidewalls of the first and second through holes and a second region in contact with a region excluding the sidewall; (b) preparing the first and second parts by injecting and foaming a foaming resin into the mold; And (c) the step of fitting the first and second parts; manufactured by a method comprising,
In the mold, the first and second regions are made of brass and aluminum, respectively, a shock-absorbing member. The method of claim 1,
The protrusion includes two or more protrusions,
The concave portion includes two or more through holes corresponding to the cross-section of the protrusion, the shock-absorbing member. The method of claim 1,
The cross-section of the protrusion and the concave portion is one selected from the group consisting of a circle, an ellipse, a polygon, and a combination of two or more thereof. delete delete The method of claim 1,
The first and second portions are made of a foam of the same type, shock-absorbing member. The method of claim 1,
wherein the foam comprises polypropylene. The method of claim 1,
The first portion of the projection and the concave portion of the second portion are fitted to form the shock-absorbing member "H" shape, the shock-absorbing member. The method of claim 1,
The first portion of the projection and the concave portion of the second portion are fitted to form the "X" shape of the shock-absorbing member, the shock-absorbing member. delete

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