JP4936378B2 - Cushion pad mold and cushion pad manufacturing method - Google Patents

Description

  The present invention relates to a cushion pad mold mainly used for a vehicle seat such as an automobile, and a method of manufacturing the cushion pad.

  Such a cushion pad is made of a foamed resin molded body such as urethane, and is used in a state where the molded body is covered with a skin. A band-shaped fastener is integrated on the surface of the cushion pad, and the skin is detachably assembled through the fastener. One surface of the fastener is provided as an engagement surface that engages with the fastener provided on the skin, and the other surface is provided as a bonding surface that is bonded to the cushion pad. Usually, a plurality of engaging elements are projected from the engaging surface.

  The cushion pad is molded by setting a fastener in a mold, pouring a foamed resin stock solution into the mold and clamping the mold, and foaming and curing the stock solution. The fastener is supported and fixed in the mold by a support member called a fastener rail, and thereby the fastener can be integrated at a predetermined position of the cushion pad while preventing the foamed resin stock solution from entering the engaging surface.

  However, when the molded cushion pad is pulled out from the mold, the longitudinal end of the fastener may get caught on the fastener rail, and the end of the fastener is peeled off from the cushion pad as a starting point. was there.

  Patent Document 1 below discloses a method of manufacturing a cushion pad in which a fastener rail provided with holding pieces at both ends in the longitudinal direction is used, and both ends of the fastener are engaged and held by the holding pieces. . However, this method suppresses the lifting of the end portion of the fastener when the foamed resin stock solution is poured into the mold, thereby preventing the fastener from being peeled off. It does not suggest a solution for peeling.

Moreover, in the following Patent Document 2, a fastener rail provided with dam portions at both ends in the longitudinal direction is used, and the interval between the dam portions is made longer than the length of the fastener, so that both ends of the fastener in the longitudinal direction and the dam portions And a cushion pad manufacturing method for forming a foamed resin stock solution reservoir therebetween. However, this method relates to a technique for preventing the infiltration of the foamed resin stock solution into the fastening surface of the fastener, and does not suggest a solution to the fastener peeling as described above.
JP 2002-369986 A JP 2003-53067 A

  The present invention has been made in view of the above circumstances, and its problem is to prevent the peeling of the longitudinal end portion of the fastener and to reliably integrate the fastener into the cushion pad and the cushion pad. It is in providing the manufacturing method of.

  The above object can be achieved by the present invention as described below. That is, the mold for cushion pad according to the present invention is a cushion pad used for manufacturing a cushion pad in which a fastener rail for supporting and fixing a belt-like fastener is provided protruding from the cavity surface, and the fastener is integrated. In the mold, the fastener rail is provided at a first bottom wall portion that extends in a longitudinal direction of the fastener and on which a fastening surface of the fastener is placed, and at a longitudinal end portion of the first bottom wall portion. And a second bottom wall portion disposed opposite to the engagement surface.

  According to the cushion pad molding die of the present invention, the fastener rail includes the first bottom wall portion and the second bottom wall portion as described above, so that the foamed resin stock solution supplied into the molding die can be joined to the fastener. Not only the surface but also the engagement between the longitudinal end portion of the engaging surface and the second bottom wall portion can be entered. As a result, a cushion pad in which the longitudinal end portion of the fastener is covered with the foamed resin is formed, and the longitudinal end portion of the fastener is not caught on the fastener rail when removed. As a result, the longitudinal end of the fastener can be prevented from peeling off and the fastener can be reliably integrated with the cushion pad. In addition, since the foamed resin undiluted solution does not enter the portion placed on the first bottom wall portion of the engaging surface, the function as a fastener is ensured.

  In the above, the fastener rail is provided at the end in the width direction of the cavity surface that forms the center portion of the cushion pad, and the side wall portion protrudes to the side of the first bottom wall portion that is the side portion side of the cushion pad. What is provided is preferable.

  According to the above configuration, when different types of foamed resin stock solutions are supplied to the center portion forming region and the side portion forming region in the mold in order to give different characteristics between the center portion and the side portion of the cushion pad, A side wall portion projecting from the side of the one bottom wall portion serves as a barrier, and mixing of different stock solutions can be suppressed. As a result, it is possible to reliably impart desired characteristics according to the portion of the cushion pad.

  In the above, it is preferable that the second bottom wall portion is provided with a restriction pin that abuts the fastener from the longitudinal direction and restricts the displacement of the fastener. With this configuration, the fastener can be accurately positioned, and the fastener can be integrated at a predetermined position of the cushion pad. In addition, since the contact with the longitudinal end of the fastener is smaller than when the displacement is restricted by a member having a plate wall shape, it is possible to prevent the fastener from being peeled off satisfactorily by suppressing the catch at the time of demolding as much as possible. it can.

  The cushion pad manufacturing method according to the present invention includes a step of setting a belt-like fastener on a fastener rail that protrudes from a cavity surface of a mold, and a foamed resin stock solution is supplied into the mold, A cushion pad manufacturing method, wherein the fastener rail extends in the longitudinal direction of the fastener and the engaging surface of the fastener is placed thereon. The molding die using a molding die comprising: a bottom wall portion; and a second bottom wall portion provided at a longitudinal end portion of the first bottom wall portion and disposed opposite to the engagement surface. The foamed resin stock solution supplied inside is made to enter between the longitudinal end portion of the engaging surface and the second bottom wall portion, and the longitudinal end portion of the fastener is covered with the foamed resin.

  According to the cushion pad manufacturing method of the present invention, the cushion pad in which the longitudinal end portion of the fastener is covered with the foamed resin as described above is formed. Such a cushion pad does not get caught on the fastener rail at the time of demolding because the longitudinal end of the fastener is not exposed on the surface. Therefore, it is possible to prevent peeling of the longitudinal end portion of the fastener and to reliably integrate the fastener with the cushion pad.

  In the above, the fastener rail is provided at the end in the width direction of the cavity surface that forms the center portion of the cushion pad, and the side wall portion protrudes to the side of the first bottom wall portion that is the side portion side of the cushion pad. It is preferable to supply different types of foamed resin stock solutions to the center portion forming region and the side portion forming region in the mold.

  According to the above configuration, when different types of foamed resin stock solutions are supplied in the center portion forming region and the side portion forming region, the side wall portion projecting to the side portion side of the first bottom wall portion is a barrier. Thus, mixing of different stock solutions can be suppressed. Thereby, the desired characteristic according to the site | part of the cushion pad can be provided reliably.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing an example of a cushion pad manufactured using a mold according to the present invention. FIG. 2 is a cross-sectional view taken along the line AA.

  The cushion pad 10 is made of a foamed resin molded body such as urethane, and is used as a backrest portion of a seat seat of an automobile. The cushion pad 10 includes a center portion 11 located at the center in the width direction, and a pair of side portions 12 protruding from the outside in the width direction of the center portion 11. A long and narrow groove 13 is formed on the surface of the center portion 11, and a belt-like fastener 1 is disposed on the bottom of the groove. A skin (not shown) that covers the cushion pad 10 is detachably assembled via the fastener 1.

  In the fastener 1, one surface of the belt-shaped base 1 a is provided as an engaging surface 1 b that engages with a fastener provided on the skin, and the other surface is provided as a joining surface 1 c that is joined to the cushion pad 10. Yes. A plurality of engaging elements that engage with fasteners provided on the skin are projected on the engaging surface 1b. Examples of the engaging element include a protrusion having a bulged head and a hook-shaped protrusion, and such a fastener 1 is conventionally known.

  The fastener 1 is integrally formed from a resin material by a known method, and the shape and dimensions thereof can be improved and changed without departing from the gist of the present invention. For example, the band-shaped base portion 1a is formed thick, the one having a T-shaped anchor protruding from the joint surface 1c, and the side portion of the engaging surface 1c of the fastener 1 is widened to enhance the anchor effect. It may be formed and protruded from the fastener rail 3 described later. In addition, the fastener 1 of this embodiment is formed with resin mixed with iron powder.

  The cushion pad 10 can be manufactured using a mold as shown in FIG. The mold 2 includes an upper mold 21 and a lower mold 22 that can be opened and closed, and is configured such that a cavity corresponding to the shape of the cushion pad 10 is formed in a mold-clamped state. Therefore, the center in the width direction in the mold is the center portion forming region 23, and the outer side in the width direction is the side portion forming region 24. The surface of the center portion 11 is formed by the cavity surface 25.

  The cavity surface 25 is provided with a ridge for forming the groove portion 13, and the fastener rail 3 is provided on the ridge on which the fastener 1 is disposed. In the present embodiment, the fastener rail 3 is provided so as to protrude from the end of the cavity surface 25 in the width direction. The fastener rail 3 is a support member for supporting and fixing the fastener 1 in the mold 2. In this embodiment, the fastener rail 3 has a long and narrow column shape as shown in FIG. 4 and can be attached to or detached from the mold 2. Is provided.

  The fastener rail 3 is provided at a first bottom wall portion 31 that extends in the longitudinal direction LD of the fastener 1 and on which the engaging surface 1b is placed, and at a longitudinal end portion of the first bottom wall portion 31. A second bottom wall portion 32 that is thinner than the bottom wall portion 31 and has a stepped shape. The length of the first bottom wall portion 31 is set to be shorter than the length of the fastener 1, and in a state where the fastener rail 3 supports and fixes the fastener 1, as shown in FIG. Oppositely arranged away from the engaging surface 1b. The space | interval of the 2nd bottom wall part 32 and the engaging surface 1b is set so that the effect mentioned later may be acquired appropriately. That is, it is set to such an extent that the foamed resin stock solution supplied into the mold 2 can enter between the end portion in the longitudinal direction of the engaging surface 1 b and the second bottom wall portion 32.

  On the second bottom wall portion 32, a regulation pin 33 is provided so as to project from the longitudinal direction LD of the fastener 1 and regulate the displacement of the fastener 1. Thereby, the fastener 1 can be positioned accurately and the positional deviation of the fastener 1 in the longitudinal direction LD can be prevented. In the present embodiment, a magnet is embedded in the fastener rail 3, and the fastener 1 is supported and fixed using the attractive force of the magnet.

  Next, a method for manufacturing the cushion pad 10 using the mold 2 will be described. First, the fastener 1 is set on the fastener rail 3 in the mold with respect to the mold 2 that is opened as shown in FIG. The longitudinal end portion of the set fastener 1 is in a cantilever state as shown in FIG. In addition, it is preferable to perform the primer process for improving the adhesiveness with foamed resin to the joint surface 1c of the fastener 1. FIG.

  After the fastener 1 is set, the foamed resin stock solution is supplied into the mold 2 and the mold is clamped and foamed and cured. At this time, the foamed resin stock solution fills the cavity while expanding, and adheres to the joint surface 1c of the fastener 1 in the process, and the cushion pad 10 integrated with the fastener 1 is foam-molded. Moreover, in the part mounted in the 1st bottom wall part 31 of the engaging surface 1b, permeation of a foamed resin stock solution is prevented, and the function as the fastener 1 is ensured by this.

  In the present invention, the foamed resin stock solution supplied into the mold 2 also enters between the longitudinal end portion of the engaging surface 1 b and the second bottom wall portion 32. As a result, the end 1d in the longitudinal direction of the fastener 1 is covered with the foamed resin as shown in FIG. Disappears. Thereby, peeling of the fastener 1 can be prevented and the fastener 1 can be reliably integrated with the cushion pad 10.

  In the present embodiment, the longitudinal end 1 d of the fastener 1 is supported in a cantilever state, and the regulation displacement in the longitudinal direction LD of the fastener 1 is performed by the regulation pin 33. Therefore, the object on which the end 1d is caught is eliminated as much as possible, and it is useful for preventing the fastener 1 from being peeled off in combination with the above effect by covering the end 1d with the foamed resin.

  FIG. 7 is a perspective view showing a fastener rail in another embodiment of the present invention. The fastener rail 4 includes a first bottom wall portion 41 and a second bottom wall portion 42 as in the above-described fastener rail 3, and is useful for preventing the fastener 1 from peeling off as described above. The fastener rail 4 is different in thickness, width, and length from the fastener rail 3, and the side wall portion 5 is formed on the side of the first bottom wall portion 41 that is the side portion 12 side (side portion forming region 24 side). It differs in that it is protruding.

  Since the side wall portion 5 is arranged along the boundary between the center portion forming region 23 and the side portion forming region 24, when different types of foamed resin stock solutions are supplied to the center portion forming region 23 and the side portion forming region 24, It is possible to suppress mixing of different stock solutions as a barrier. The protruding height of the side wall part 5 is set so that this effect can be obtained appropriately. The supply of such different kinds of foamed resin stock solutions depends on the part of the cushion pad 10 such as the center part 11 is formed of a relatively hard foamed resin and the side part 12 is formed of a relatively soft foamed resin. It is used when desired characteristics are imparted.

The front view which shows an example of the cushion pad manufactured using the shaping | molding die concerning this invention AA arrow sectional view of FIG. Sectional drawing which shows an example of the shaping | molding die concerning this invention Perspective view of fastener rail Perspective view of the main part when the fastener is supported and fixed to the fastener rail Perspective sectional view showing the longitudinal end of the fastener integrated with the cushion pad The perspective view which shows the fastener rail in another embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fastener 1b Engaging surface 1c Joining surface 1d Longitudinal end 2 of fastener 2 Mold 3 Fastener rail 4 Fastener rail 5 Side wall portion 10 Cushion pad 11 Center portion 12 Side portion 23 Center portion forming region 24 Side portion forming region 25 Cavity surface 31 1st bottom wall part 32 2nd bottom wall part 33 Restriction pin LD Longitudinal direction of a fastener

Claims (4)

In a mold for cushion pad, a fastener rail for supporting and fixing a belt-like fastener is provided protruding from the cavity surface, and used for manufacturing a cushion pad in which the fastener is integrated.
The fastener rail is provided at a first bottom wall portion that extends in a longitudinal direction of the fastener and on which a fastening surface of the fastener is placed, and at a longitudinal end portion of the first bottom wall portion, A second bottom wall portion disposed oppositely from the wearing surface , wherein the fastener rail is provided at an end in a width direction of a cavity surface forming a center portion of the cushion pad, and the first bottom wall portion A cushion pad mold having a side wall projecting from the side of the cushion pad. In a mold for cushion pad, a fastener rail for supporting and fixing a belt-like fastener is provided protruding from the cavity surface, and used for manufacturing a cushion pad in which the fastener is integrated.
The fastener rail is provided at a first bottom wall portion that extends in a longitudinal direction of the fastener and on which a fastening surface of the fastener is placed, and at a longitudinal end portion of the first bottom wall portion, A second bottom wall portion that is disposed to face away from the wearing surface, and a restriction pin that protrudes from the longitudinal direction of the second bottom wall portion to restrict the displacement of the fastener is protruded from the second bottom wall portion. A cushion pad mold characterized by A step of setting a belt-like fastener on a fastener rail protruding from the cavity surface of the mold, a step of supplying a foamed resin stock solution into the mold and foam-molding a cushion pad integrated with the fastener; In a method for manufacturing a cushion pad, comprising:
The fastener rail is provided at a first bottom wall portion that extends in a longitudinal direction of the fastener and on which a fastening surface of the fastener is placed, and at a longitudinal end portion of the first bottom wall portion, A second bottom wall portion disposed oppositely from the wearing surface, wherein the fastener rail is provided at an end in a width direction of a cavity surface forming a center portion of the cushion pad, and the first bottom wall portion Using a mold having a side wall projecting from the side of the cushion pad,
Different types of foamed resin stock solutions are supplied to the center part forming region and the side part forming region in the mold, and the foamed resin stock solution supplied into the mold is used to connect the longitudinal end of the engagement surface and the first end. 2. A cushion pad manufacturing method, wherein the cushion pad is inserted between the bottom wall portion and the longitudinal end portion of the fastener is covered with foamed resin . A step of setting a belt-like fastener on a fastener rail protruding from the cavity surface of the mold, a step of supplying a foamed resin stock solution into the mold and foam-molding a cushion pad integrated with the fastener; In a method for manufacturing a cushion pad, comprising:
The fastener rail is provided at a first bottom wall portion that extends in a longitudinal direction of the fastener and on which a fastening surface of the fastener is placed, and at a longitudinal end portion of the first bottom wall portion, A second bottom wall portion that is disposed to face away from the wearing surface, and a restriction pin that protrudes from the longitudinal direction of the second bottom wall portion to restrict the displacement of the fastener is protruded from the second bottom wall portion. Using the mold
The foamed resin stock solution supplied into the mold is infiltrated between the longitudinal end of the engaging surface and the second bottom wall, and the longitudinal end of the fastener is covered with foamed resin. A method for manufacturing a cushion pad.

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