KR102071847B1 - Mesh layered car seat cushion having different hardnesses and mold for manufacturing the same - Google Patents

Abstract

The present invention relates to a multi-layered cushion with different hardness for a vehicle seat. On the top of a foam (10) forming a cushion body, a multi-mesh (60) comprising a plurality of support yarn (62) is stacked between a pair of surface nets (61), so that the foam (10) and the multi-mesh (60) act as a hard unit and a soft unit, respectively. Through the present invention, improved ventilation and resilience are provided to the multi-layered cushion with different hardness for a vehicle seat, thereby significantly improving agreeable and comfort sensation of the vehicle seat.

Description

Multi-layer laminated hard hardness buffer for automobile seat and mold for manufacturing thereof {MESH LAYERED CAR SEAT CUSHION HAVING DIFFERENT HARDNESSES AND MOLD FOR MANUFACTURING THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-layered two-hardness shock absorber used for automobile seats, wherein a plurality of support yarns 62 are disposed between a pair of surface layer networks 61 on an upper portion of the foam 10 forming a buffer body. The multiple meshes 60 constituted are stacked so that the foam 10 and the multiple meshes 60 act as hard portions and soft portions, respectively.

The multi-layered hardness buffer is a buffer composed of a foamed resin molded product having different hardness, as in the prior sense, and is mainly applied to a buffer for an automobile seat, etc., and the base and the outer frame of the buffer, etc. By stacking the soft portion on the upper surface of the hard portion to form a, while ensuring the stability and durability of the cushioning body, while the center of the upper surface of the seat where the weight is concentrated when sitting is to provide comfort.

The multilayer two-hardness buffer may be manufactured by separately molding the hard part of the lower layer and the soft part of the upper layer, and then attaching the same. The surface bonding is difficult due to the properties of the foamed synthetic resin, and the hardness is different in the process of use. As both layers are deformed and restored, there is a problem in that the adhesive surface tissue is broken.

That is, due to the properties of the foamed synthetic resin, which is a porous body having excellent water absorption, the adhesive force may be lost as soon as the adhesive is absorbed, and in order to overcome this problem, when the large amount of adhesive is applied, the foamed synthetic resin tissue that absorbs the large amount of adhesive is hardened and has its own elasticity. Even if the soft and hard part interlayer adhesion surfaces of the buffer are formed, the adhesive surface and the surrounding foamed synthetic resin tissue are degraded in the course of repeated deformation of both layers having different elastic modulus.

In addition, as described above, the method of molding the hard part and the soft part into separate molds causes problems of complicated process and quality control and raises production costs. In particular, a number of synthetic resin foam molding products including buffers for automobile seats are used. By the continuous foam molding equipment in which the mold is circulated by a conveyor and passes through a plurality of injectors, ovens, and takeout devices, and the whole process of raw material injection, foaming, curing, and demolding is continuously performed. As it is generally manufactured, the individual manufacturing and assembling methods of the hard part and the soft part are applicable not only by adding a mold but by additionally adding a separate continuous foam molding facility, which requires a huge facility cost.

Accordingly, Patent Publication No. 2013-27799 has been developed in which a nonwoven fabric for dividing the mold inner space into upper and lower parts is inserted into the mold and then injected with a soft portion raw material and a hard portion raw material into the upper and lower spaces of the nonwoven fabric, respectively. As the interlayer adhesion through the nonwoven fabric is carried out simultaneously with the molding of the synthetic resin, it is possible to solve the problems caused by the above-described adhesive application.

However, the following various problems have also been derived from the nonwoven fabric-insertable multilayer durometer buffer including Unexamined-Japanese-Patent No. 2013-27799.

First of all, it is difficult to maintain the position and shape of the nonwoven fabric in the mold uniformly throughout the entire process of synthetic resin foaming, from raw material input, compounding, heating, and foaming, so there is a limitation in securing the precision of the finished product and intimate adhesion between layers. There is a problem that the defective rate is high.

In particular, during the foaming process of the synthetic resin, the liquid synthetic resin is impregnated in the nonwoven fabric and excessively hardened, or even after the completion of molding, that is, the foamed synthetic resin expands and reaches the nonwoven fabric, the foamed gas between the hard portion and the soft portion is due to the characteristics of the nonwoven fabric, which is a breathable material. Unnecessary exchange phenomenon occurred, there was a problem that frequent defects such as partial depression or over-expansion of the molding.

In addition, since there is a need to fix the nonwoven fabric in the mold at the correct position in the entire process of foam molding, various fixing means for fixing the nonwoven fabric such as support pins or support clips are required, and these fixing means must be embedded in the buffer. There is a serious problem that degrades the basic performance of the finished buffer, such as touch and elasticity.

Accordingly, the hard part and the soft part constituting the buffer body are molded in a single mold, but the mold space is divided into left and right sides instead of being divided into upper and lower spaces, and the hard and soft parts are formed in the divided both spaces, respectively. Both foamed synthetic resins are intimately mixed at the connecting portion between the two divided spaces, and once the single buffers in a developed state are formed, the single hard buffers are folded and the soft parts of the upper layers overlap with each other. Patent Publication No. 2015-64813 was developed to complete the multi-layered hardness buffer, it is possible to produce a multi-layered hardness buffer without inserts, as well as non-woven fabric, such as adhesive applied to the interlayer.

However, the left and right dividing mold applied two-layered multi-layer buffer of Korean Patent No. 2015-64813 has a serious problem that the soft layer as well as the soft layer is made of a foamed synthetic resin, lacking breathability.

That is, a foamed synthetic resin that is not expected to be breathable at all is applied to the soft part of the upper layer directly in contact with the user's body, it was not possible to perform ventilation or aeration function through the upper layer at the time of sitting, which is a user's fatigue when using for a long time It acted as a weighting factor.

In addition, in the left and right divided mold applied two-hardness multi-layer buffers of Korean Patent No. 2015-64813, adhesives and non-woven fabrics are excluded in joining between the hard part of the lower layer and the soft part of the upper layer, but the joining protrusions and the recesses are required. The way in which the mouths are connected to each other is introduced, which can solve problems such as rupture of the adhesive surface or stiffness due to nonwoven fabric. However, the following problems have been derived.

First of all, the method of utilizing the fastening between the protrusion and the indentation in joining the hard part and the soft part causes serious problems in terms of performing the fastening operation and maintaining the fastening properties of the foamed synthetic resin, which is a material of the buffer.

The foamed synthetic resin, which is a material of the seat cushion, is excellent in elasticity and restorability, and thus can effectively perform shock relaxation, which is a natural function, but such physical properties such as elasticity act as serious disadvantages in mechanical bonding.

That is, the protrusions or indentations formed in the hard part and the soft part are combined in such a manner that the protrusions are inserted into the indentation part by pressing the hard part and the soft part in a folded state, wherein the protrusions are self-compressed due to the elasticity of the material itself. The deformation may not be sufficiently inserted into the indentation part. In particular, as the external force or impact is repeatedly applied in the process of using the buffer, the hard part or the soft part may also be pulled out of the protrusion which is coupled to the indentation part while repeating the deformation and restoration. It is.

In view of the above-described problems, the present invention provides a highly breathable and resilient part to the soft part of the upper layer while molding a multilayer two-hardness buffer for a car seat through a single mold, while maintaining structural stability of the entire buffer while It is designed to double the comfort and make solid binding between the upper layer and the lower layer, and the multi-layer 60, which is a soft part of the upper layer, is closely stacked on the upper surface of the foam 10, which is a hard part of the lower layer, in the two-hardness cushioning material for automobile seats. The buffer is configured, the multi-network 60 is composed of a plurality of supporters 62 are connected to a pair of surface layer 61 spaced apart from each other, one end of the multi-network 60 of the foam (10) It is embedded in the front end fixed, and the other end of the multi-mesh 60 is a multi-mesh laminated two-dimensional buffer for automobile seats, characterized in that fixed to the rear end of the foam (10).

In addition, the rear end portion of the foam 10 is formed with a fastening hole 17 which penetrates the foam 10 upwards and downwards, and the fastening hole 17 is formed in a direction crossing the foam 10 in plan view. The ends of the multi-mesh 60 on the other side of the buried foam 10 are inserted into and fixed to the fastening hole 17, and the ends of the multi-network 60 are exposed to the bottom of the foam 10 through the fastening hole 17. It is a multi-layer laminated two-dimensional buffer for automotive seats.

In addition, in the mold for manufacturing a multi-layer laminated two-dimensional buffer for automobile seats, the mold is composed of a combined mold in which the upper mold 40 is coupled to the upper mold 30, and the front end and the lower mold of the upper mold 40 ( Combination inserts 26 are formed at the front ends of the 30, respectively, and when the upper mold 40 and the lower mold 30 are combined, the multiple meshes 60 are coupled to the openings formed by combining the combination inserts 26. It is a metal mold | die for manufacturing the multi-network laminated two-hardness buffer for automobile seats.

In addition, in the mold for manufacturing a multi-layer laminated two-dimensional buffer for automobile seats, the mold is composed of a combination mold in which the upper mold 40 is coupled to the upper mold 30 and penetrates the front wall of the upper mold 40. An upper mold insertion hole 46 is formed, and when the upper mold 40 and the lower mold 30 are combined, the multi-mesh 60 is coupled to the upper mold insertion hole 46, or a lower mold insertion hole penetrating the front end of the lower mold 30 ( 36 is formed, the multi-mesh laminated two-dimensional buffer for the production of a car seat, characterized in that the multiple network 60 is coupled to the lower mold insertion hole 36 when the upper mold 40 and the lower mold 30 is combined.

Through the present invention, it is possible to impart a high degree of breathability and resilience to the multi-layered hardness of the car seat cushion, thereby significantly improving the comfort and comfort of the car seat.

In addition, not only the firm interlayer bonding between the foam 10 of the lower layer and the multi-layer 60 of the upper layer can be prevented, but also the breakage of the tissue around the attachment surface can be prevented, thereby improving the performance and durability of the buffer.

In particular, since the adhesion or fusion of any one layer is excluded in the interlayer bonding, even if the heterogeneous material is mixed as a buffer, it is possible to easily separate and discard each material upon disposal, which is advantageous for recycling or reuse, and thus the environment caused by waste. The effect of preventing contamination can also be obtained.

1 is a perspective view of the excerpt of the present invention buffer
2 is a partially cutaway perspective view of the buffer of the present invention
Figure 3 is a perspective view of the multiple network extract of the present invention buffer
Figure 4 is a cross-sectional view of the mold for producing a buffer of the present invention.
5 is an explanatory view of a molding method of the present invention buffer.
6 is an explanatory diagram of the stacking method of the present invention buffer.
Figure 7 is an explanatory diagram of a buffer manufacturing method of the present invention to which a pictograph insert is applied
8 is an explanatory diagram of a buffer manufacturing method of the present invention to which a lower mold insertion hole is applied;
9 is an explanatory view of the present invention buffer manufacturing method applied fastening hole

The detailed configuration of the present invention through the accompanying drawings as follows.

First, Figure 1 shows the use state and appearance of the multi-layer 60 laminated two-hardness shock absorber for the vehicle seat of the present invention, as shown, the shock absorber of the present invention is embedded in the seat of the vehicle, that is, the seat It consists of lamination | stacking of the foam 10 which is a hard part of a lower layer, and the multi-network 60 which is a soft part of an upper layer is laminated | stacked.

In addition, the rigid foam 10 at both end portions of the seat cushions is formed with a bolster 18 protruding upwardly in the longitudinal direction of the seat so as to secure riding stability.

Figure 2 shows the detailed structure of the present invention the two-hard buffer, as shown, the upper layer of the soft portion of the foam 10, the upper layer of the soft layer of the multi-layer 60 is laminated tightly, the buffer is composed, One end of the multi-mesh 60 is embedded in the front end of the foam 10, and the other end of the multi-mesh 60 is fixed to the rear end of the foam 10.

That is, the multi-layer 60 is laminated on the upper surface between the two bolsters 18 of the lower foam 10 constituting the buffer to form a multi-layer structure, the multi-layer 60 forming the upper layer is as shown in FIG. Likewise, a plurality of supporters 62 are connected to a pair of surface layer networks 61 spaced apart from each other.

The multi-network 60 applied to the present invention is not a simple network, in which the network is arranged on a single plane, as in the dictionary meaning, but the multiple network in which the mesh forms three-dimensional and forms a considerable thickness. As the mesh, the multi-layer 60 is closely stacked on the upper surface of the foam 10, so that the comfort and comfort through the elasticity and resilience peculiar to the multi-layer 60, and based on the excellent breathability of the multi-layer 60 It can provide a feeling of sitting.

As described above, the multi-network 60 is a pair of surface layer 61 is spaced apart from each other, a plurality of supporters (62) are configured between these surface layer 61, the support ( As in the dictionary sense of 62, a pair of surface layer 61 is supported by the elasticity of the supporter 62, the spaced state between the surface layer 61 is maintained.

The plurality of support yarns 62, as shown in Figure 3, forms a direction orthogonal to the plane formed by the surface layer 61, both ends are bonded to or bonded to both surface layer 61, the surface layer ( The surface layer 61 is spaced apart from each other by forming a plurality of rows per mesh of the meshes constituting 61).

Here, the supporter 62 is not a rigid body that maintains its hardness, and is composed of a fiber having sufficient flexibility, but nevertheless, because the supporter 62 is densely configured, spaced between the surface layer 61 It can be maintained, and the resilience that the surface of the network 61 and the support yarn 62 is combined by the elasticity of the collective expression of a plurality of support yarns 62 gives a restoring force.

As such, the multi-network 60 of the present invention can be knitted in the form of a knitted fabric, as shown in FIG. 3, to form a tissue in a manner in which the surface layer 61 and the plurality of supporters 62 are mutually bound. After one end of the support yarn 62 is knitted to bind to one of the surface layer networks 61, the other surface layer network 61 may be fabricated in a manner of fusion or the like.

On the other hand, Figure 4 illustrates a mold for molding the multi-layer 60 laminated two-dimensional buffer for the automobile seat of the present invention, as shown in the figure, the mold of the present invention upper mold (40) on the lower mold 30 ) Is composed of a combined mold, the combination inserting holes 26 are formed at the front end of the upper mold 40 and the front end of the lower mold 30, respectively, and the upper mold 40 and the lower mold ( When the combination of 30), the multiple network 60 is coupled to the opening formed by combining the combination insertion hole 26.

That is, as shown in Figure 5, in the state in which the multi-mesh 60 is coupled to the mold to be molded, the foamed synthetic resin injected into the mold is foam molded, one side of the multi-mesh 60 simultaneously with the molding of the foam (10) When the end is embedded in the foam 10, the upper mold 40 and the lower mold 30 are demolded and the molded foam 10 is taken out to complete the molding as shown in the upper end of FIG.

Thereafter, by closely stacking the multi-mesh 60 on the upper surface of the foam 10 constituting the molded article, the two-hardness buffer as shown in FIGS. 1 and 2 is completed, as shown in the lower end of FIG. In order to firmly fasten the multi-mesh 60 on the upper surface of the foam 10, the end of the multi-mesh 60 and the foam 10 can be sewn. Although not illustrated in the drawings, the end of the multi-mesh 60 and the foam 10 Binding means, such as a hook which mutually binds), can also be provided.

In the mold illustrated in FIGS. 4 and 5, the opening into which the multi-mesh 60 is inserted is formed as a combination insertion hole 26 in each of the upper surface of the lower end of the lower mold 30 and the lower surface of the upper end of the upper mold 40. As in, the multi-mesh 60 is embedded in the center of the front surface of the foam (10), but in addition to forming a variety of openings for inserting the multi-mesh 60 in the mold, the multi-mesh 60 The embedding point and overall lamination or coating shape can be controlled.

First, FIG. 7 shows an upper mold 40 having an opening into which a multi-mesh 60 is inserted, and an upper mold insertion hole 46 penetrating the front wall of the upper mold 40 is formed, and is shown at the lower end of the figure. As described above, the multiple nets 60 are embedded in the upper portion of the front surface of the foam 10.

That is, as shown in the central portion of FIG. 7, when the upper mold 40 and the lower mold 30, the multiple network 60 is coupled to the upper mold insertion hole 46 formed only in the upper mold 40, the upper mold 40 Compared to the embodiment of FIGS. 4 and 5 in which the multi-mesh 60 is precisely inserted between both molds when the lower mold 30 and the lower mold 30 are combined, only a part of the front surface of the foam 10 is multi-mesh 60. There is a limit to this covering.

Thus, an opening into which the multi-mesh 60 is inserted may be formed in the lower mold 30 instead of the upper mold 40, and as shown in FIG. 8, the lower mold insertion hole 36 penetrating the front end of the lower mold 30 is formed. When the upper mold 40 and the lower mold 30 are combined, the multiple network 60 may be coupled to the lower mold insertion hole 36.

As shown in the lower part of FIG. 8, the multi-mesh 60 can be inserted into the lower mold 30 to sufficiently cover the front surface of the foam 10, in particular, as illustrated in the drawing. By forming the 36 on the bottom face of the front end of the lower mold 30, the buried portion of the multi-mesh 60 is formed on the bottom face of the front end of the foam 10, which enables a more robust embedding, as well as the completed buffer front face. A soft ventilation layer can be formed in the whole part, and the comfort can be maximized.

Conventional multi-layered hardness buffers are mainly formed on the upper surface of the buffer, the soft portion is formed, not only did not expect breathability at all as in the present invention, but also the front end of the buffer is mainly composed of a hard body, so sad when sitting for a long time Uncomfortable due to the pressure of wealth was inevitable.

In particular, in the driver's seat, the center and rear ends of the shock absorber not only secure a relatively large contact area, but the hips contact the stationary state. Not only is the area small, but the shape of the contact is also sharp, and as the pedal is operated, the slender parts sensitive to the sharp front end can be repeatedly pressed, which causes a lot of inconvenience for the driver.

Therefore, the entire front part of the cushioning body is covered with a multi-layer 60 having excellent flexibility, resilience and breathability as shown in FIG. 8, which can maximize occupant comfort and minimize discomfort even when sitting for a long time. Can be.

On the other hand, Figure 9 is a means for binding the multi-mesh 60 to the foam 10, the rear end of the foam 10 is formed by cutting the fastening hole 17 for penetrating the foam 10 up and down , The end portion of the multi-mesh 60 on the other side of the buried portion of the foam 10 is inserted into and fixed to the fastening hole 17.

Such a fastening hole 17 is formed long in the direction crossing the planar foam 10, and as shown in the lower view of FIG. 9, the end of the multi-network 60 passes through the fastening hole 17, the foam 10 ) Exposed to the bottom.

In addition, in forming the fastening hole 17 forming foam 10, the fastening hole forming part 47 is formed in the upper mold 40 constituting the combination mold, as shown in Figure 9, the fastening hole forming part 47 Is protruded downward from the inner surface of the rear end of the upper die 40, the lower end of the fastening hole forming portion 47 when the upper die 40 and the lower die 30 is in close contact with the inner surface of the rear end of the lower die 30.

As a result, a fastening hole 17, which is a long hole having a width corresponding to the width of the multi-mesh 60 in plan view, is formed at the rear end of the foam 10, and the fastening hole 17 of the multi-mesh 60 is formed. As the end portion is press-fitted, the end portion of the multi-network 60 is coupled to the fastening hole 17, thereby enabling a solid binding between the foam 10, which is a hard portion, and the multi-layer 60, which is a soft portion, as well as the properties of the flexible foamed resin. It is possible to build a tight tightening structure that has not been achieved in the prior art.

That is, instead of simply pressing and inserting both coupling objects, after inserting the distal end of the multi-mesh 60 into the fastening hole 17 through which the foam 10 is completely penetrated, the end of the multi-network 60 is As it passes through the fastening hole 17 and is exposed to the bottom of the foam 10, as shown in the lower part of FIG. 9, the multi-mesh 60 and the foam 10 are pulled out by pulling the exposed end of the multi-mesh 60. It is to enable a solid and sufficient bond between the liver.

In addition, the soft portion and the multi-mesh 60 are adhered or fused through further processing such as sewing the end of the multi-mesh 60 exposed to the lower portion of the foam 10 and the bottom of the foam 10 or fastening a binding hole. Even without measures such as, it is possible not only to firmly secure the multi-network 60, but also because the sewing line or the binding port is not exposed to the upper side, it is possible to prevent the foreign body feeling and appearance damage due to the exposure of the sewing line or the binding buffer upper side. have.

In particular, the non-bonded to the non-fused fixing of the multi-mesh 60 is used to dispose of the foamed synthetic resin constituting the foam 10 and the multi-mesh 60 as a dissimilar material even in the discarding of the present invention applied buffer. It can be easily and cleanly separated, which is advantageous for recycling or recycling, and environmental pollution caused by waste can be reduced.

10: foam
17: fastener
18: bolster
26: combination insertion hole
30: lower mold
36: lower mold insertion hole
40: Pictograph
46: Pictograph insertion opening
47: fastening hole molding part
60: multiple network
61: surface network
62: supporter

Claims (5)

The upper surface of the foam 10, which is a hard part of the lower layer, and the multi-layer 60, which is the soft part of the upper layer, is closely stacked to constitute a buffer, and the multi-network 60 has a plurality of support yarns (a pair of surface layer networks 61 spaced apart from each other). 62 is connected and configured, one end of the multi-mesh 60 is embedded fixed to the front end of the foam 10, the other end of the multi-mesh 60 is fixed to the rear end of the foam 10 In the multi-layer laminated two-hardness buffer for
The rear end of the foam 10 is formed with a fastening hole 17 through which the foam 10 penetrates up and down, and the fastening hole 17 is formed in a direction crossing the foam 10 on a plane;
The end of the multi-layer 60 on the other side of the buried foam 10 is inserted and fixed in the fastening hole 17, and the end of the multi-network 60 passes through the fastening hole 17 and is exposed to the bottom of the foam 10. Multi-layer laminated hardness buffer for automobile seats.
The upper surface of the foam 10, which is a hard part of the lower layer, and the multi-layer 60, which is the soft part of the upper layer, is closely stacked to constitute a buffer, and the multi-network 60 has a plurality of support yarns (a pair of surface layer networks 61 spaced apart from each other). 62 is connected and configured, one end of the multi-mesh 60 is embedded fixed to the front end of the foam 10, the other end of the multi-mesh 60 is fixed to the rear end of the foam 10 In the mold for manufacturing multi-network laminated two-hardness buffer,
The mold is composed of a combined mold in which the upper mold 40 is coupled to the upper mold 30;
Combination insertion hole 26 is formed in the front end part of the upper mold | type 40, and the lower part of the lower mold | type 30, respectively, When the upper mold | type 40 and the lower mold | type 30 are combined, the opening part formed by combining these combination insertion holes 26 is formed. Mold for manufacturing a multi-layer laminated two-hard buffer for automobile seats, characterized in that the multiple network 60 is coupled to.
The upper surface of the foam 10, which is a hard part of the lower layer, and the multi-layer 60, which is the soft part of the upper layer, is closely stacked to constitute a buffer, and the multi-network 60 has a plurality of support yarns (a pair of surface layer networks 61 spaced apart from each other). 62 is connected and configured, one end of the multi-mesh 60 is embedded fixed to the front end of the foam 10, the other end of the multi-mesh 60 is fixed to the rear end of the foam 10 In the mold for manufacturing multi-network laminated two-hardness buffer,
The mold is composed of a combined mold in which the upper mold 40 is coupled to the upper mold 30;
An upper mold insertion hole 46 penetrating the front wall of the upper mold 40 is formed, so that the multiple network 60 is coupled to the upper mold insert 46 when the upper mold 40 and the lower mold 30 are combined. Mold for manufacturing multi-layer laminated two-dimensional buffer for sheets.
The upper surface of the foam 10, which is a hard part of the lower layer, and the multi-layer 60, which is the soft part of the upper layer, is closely stacked to constitute a buffer, and the multi-network 60 has a plurality of support yarns (a pair of surface layer networks 61 spaced apart from each other). 62 is connected and configured, one end of the multi-mesh 60 is embedded fixed to the front end of the foam 10, the other end of the multi-mesh 60 is fixed to the rear end of the foam 10 In the mold for manufacturing multi-network laminated two-hardness buffer,
The mold is composed of a combined mold in which the upper mold 40 is coupled to the upper mold 30;
The lower mold insertion hole 36 penetrating through the front end of the lower mold 30 is formed, and when the upper mold 40 and the lower mold 30 is combined, the multiple mesh 60 is coupled to the lower mold insertion hole 36 for an automobile seat. Mold for manufacturing multi-layer laminated hardness buffer. delete

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