JP4137090B2 - Manufacturing equipment for skin foam - Google Patents

Description

  The present invention relates to an apparatus for manufacturing a foam integrated with an outer skin such as a headrest or an armrest provided in an automobile seat.

  For the headrests and armrests of automobile seats, a frame, etc. is placed in the skin material sewn in a bag shape, and then the funnel tip is inserted into the skin material, and a nozzle for injecting foaming liquid is inserted into this funnel. In some cases, a foam is injected into the skin material through a funnel to foam the foam integrally with the skin and frame.

By the way, when a foaming liquid is injected into the skin material, gas is generated at the time of foaming. Therefore, it is necessary to extract this gas to the outside.
As a method for extracting the gas, for example, as shown in Patent Document 1, an extraction hole is opened in the skin and the mold, and a gas is extracted by mechanically opening a plug that closes the extraction hole. Are disclosed.

Japanese Patent Laid-Open No. 10-15963

  By the way, according to the gas extraction structure, a bag-shaped skin material and a mold that accommodates the skin material are provided with a gas extraction hole, and the extraction hole is opened and closed with a stopper. This complicates the structure of the device.

  Moreover, since an extraction hole is required in the skin material, the foam may leak out of the skin material from the extraction hole.

  Further, until the injected foaming liquid is cured, the foaming liquid flows backward unless the nozzle is applied to the funnel.

  Accordingly, an object of the present invention is to provide a manufacturing apparatus that can be foam-molded in a short time with a simple structure and that can completely prevent leakage of the foam from the gas extraction hole to the outside.

  In order to achieve the above object, an apparatus for producing a foam integrated with a skin according to the present invention is injected into a skin material from a nozzle for injecting a foaming liquid through a funnel body inserted into a bag-shaped skin material. A device for producing a foam integrated foam product integrally foamed with the skin material, wherein the funnel body is detachably provided with a backflow preventing funnel, and the nozzle is applied to the backflow preventing funnel to supply the foaming liquid. It is the structure characterized by inject | pouring.

  With the above configuration, when the nozzle is pulled out from the backflow prevention funnel after injecting the foaming liquid, the gas is extracted from the backflow prevention funnel to the outside, but the foaming liquid does not flow back out from the backflow prevention funnel. .

The funnel for backflow prevention is disposed in the funnel main body, a stop ring fitted into the base end portion of the funnel main body, a conical cylindrical body part integrated with the stop ring and inserted into the funnel main body. It is comprised from the thin tube part extended at the front- end | tip of a cylinder part .

  Further, by opening a locking hole in the base end of the funnel body and providing a protrusion for locking in the locking hole on the outer periphery of the stop ring of the backflow prevention funnel, Easy to put on and take off.

  According to the present invention, since the foaming liquid is injected into the bag-shaped skin through the funnel body through the funnel for backflow prevention from the foaming liquid injection nozzle, the nozzle can be immediately pulled out from the backflow prevention funnel. It is possible to shorten the production tact of the foam integrated with the skin.

That is, after injecting the foaming liquid from the nozzle, when the nozzle is withdrawn from the backflow prevention funnel, the gas during the foaming progresses to the outside through the funnel body and the backflow prevention funnel. Since the foaming liquid does not flow back from the funnel to the backflow prevention funnel, the foaming liquid does not leak out from the backflow prevention funnel.
Therefore, after foam molding, the foaming liquid does not leak out of the skin material and the mold, and gas does not accumulate in the skin.
Therefore, the appearance quality of the foamed product and the quality of the foamed product are not impaired.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows an apparatus according to the present invention, in which 1 is a funnel body of a well-known form, 2 is a funnel for backflow prevention, 3 is a nozzle for injecting foaming liquid, 4 is a skin material sewn in a bag shape, 5 Indicates each mold.

  As shown in FIG. 2, the funnel body 1 is made of a synthetic resin such as polypropylene so that the foam after foaming can be easily removed from the inside, that is, the foam is easily peeled from the inner surface. A small-diameter thin tube 11 to be inserted into the skin material 4 mounted therein, a thick tube 10 integral with the thin tube 11, and a large-diameter base integrally with the proximal end of the thick tube 10 and with respect to the thick tube 10 It is comprised from the edge part 12. FIG.

  A plurality of locking holes 12A, 12A are opened in the base end portion 12 and protrusions 22A, 22A provided on the retaining ring 22 of the backflow prevention funnel 2 are engaged with the locking holes 12A, 12A. Thus, the backflow prevention funnel 2 is configured to be fixed to the funnel body 1.

  In addition, 12B in the figure shows the contact part provided in the base end part 12. FIG.

  The backflow prevention funnel 2 has a shape in which the funnel body 1 is reduced in size, and is formed so that it can be attached to the base end 12 of the funnel body 1 and can be removed from the funnel body 1 as shown in FIG. Has been.

  That is, the backflow prevention funnel 2 includes a retaining ring 22 fitted into the proximal end portion 12 of the funnel body 1, a donut-shaped receiving plate 22B that is integral with the retaining ring 22 and abuts against the abutting portion 12B, Consists of a conical cylindrical body portion 20 that is integral with the inner peripheral surface of the receiving plate 22B and is inserted into the thick tube 10 of the funnel body 1, and a narrow tubular portion 21 that extends from the distal end of the cylindrical body portion 20. Yes.

  The narrow tube portion 21 is formed to have an inner diameter that allows the foaming liquid to be injected into the funnel body 1 by a high injection pressure from the nozzle 3 and does not flow back due to the foaming liquid pressure of the foamed liquid after the injection.

  The cylindrical portion 20 is formed in a conical shape so that the foaming liquid can be injected through the thin tube portion 21 with a small resistance.

  Moreover, the cylindrical body part 20 is formed to have a short overall length so that even if the foaming liquid accumulated between the funnel body 1 reacts with the tubular body part 20, the volume to be accumulated is small so that it does not foam and overflow.

  As described above, when the protrusions 22 </ b> A and 22 </ b> A provided on the outer periphery of the retaining ring 22 of the backflow prevention funnel 2 are locked in the locking holes 12 </ b> A and 12 </ b> A of the funnel body 1, the backflow prevention funnel 2 is fixed to the funnel body 1. . And if protrusion 22A, 22A is pressed inward, protrusion 22A, 22A will be extracted from latching hole 12A, 12A, Therefore The funnel 2 for backflow prevention can be removed from the funnel main body 1. FIG.

  And, like the funnel body 1, the backflow prevention funnel 2 is molded from a hard synthetic resin such as polypropylene so that the foaming liquid adhering to the inside can be easily removed, and can be reused.

  The nozzle 3 is a nozzle of an injection machine conventionally used for injecting a foaming liquid of this type. As shown in FIG. 1, the injection port is placed in a backflow prevention funnel 2 to provide the same funnel 2 and funnel body 1. It is configured so as to be injected into the bag-shaped skin material 4 mounted in the mold 5.

  In the case of the skin material 4 described above, in the case of a headrest, an insertion portion for inserting a U-shaped stay is opened, and the thin tube 11 of the funnel body 1 is inserted into a part of the insertion portion. The insertion part is formed so that the folded piece part 4 ° 4 ° is joined toward the inside, and the foaming liquid is formed so as not to leak out from the insertion part.

  The skin material 4 is a conventionally known material used for headrests and armrests. For example, a surface layer material such as woven fabric or synthetic leather, a wadding such as urethane foam on the inner surface side, and a The laminated body which consists of wadding covers, such as a nonwoven fabric provided integrally on the outer side, is used.

  After the frame is mounted in the skin material 4 from the insertion portion, it is accommodated in the mold 5, and after inserting the thin tube 11 of the funnel 1 into the skin material 4 from the mold 5, as shown in FIG. The tip 20 is applied to the funnel 1 with the extraction piece 3, and the foamed liquid is injected into the skin material 4 in the mold 5 through the funnel 2 for backflow prevention and the funnel body 1. At that time, the foaming liquid passes through the narrow tube portion 21 of the backflow prevention funnel 2 by injection pressure and press-fits into the funnel body 1.

Then, the foaming liquid in the skin material 4 is foamed and cured, and the foam P is integrally foam-molded together with the skin material 4 and the frame.
While the foaming proceeds, gas is generated in the skin material 4, and this gas is released from the funnel body 1 through the backflow prevention funnel 2 to the outside.

  Then, as shown in FIG. 3, the foaming liquid remaining in the backflow preventing funnel 2 and the funnel body 1 foams into a foam when the foaming progresses, but the foaming in the funnel body 1 and the skin material 4 The liquid P1 does not flow back into the backflow prevention funnel 2. However, the gas generated when the foaming liquid injected into the skin material 4 progresses is released to the outside through the funnel body 1 and the backflow prevention funnel 2.

  Therefore, even if the nozzle 3 is removed from the backflow prevention funnel 2 after injecting the foaming liquid, the foaming liquid will not flow back, so as before, the nozzle of the injection machine is applied to the funnel until the foaming liquid has hardened, There is no need for the nozzle to prevent backflow leakage of the foam.

  Therefore, the stop time of the injector can be reduced compared to the conventional one using the nozzle and the funnel. Therefore, the production tact time can be shortened by omitting the curing time of the foaming liquid of the foam product.

  After the injected foaming liquid has hardened, the funnel body 1 is removed from the skin material 4 and the backflow prevention funnel 2 is removed from the funnel body 1 to remove the hardened foaming liquid in each of the funnels 1 and 2. Reuse both funnels 1,2.

It is sectional drawing which shows the mounting state of this invention apparatus. It is a disassembled perspective view of this invention apparatus. It is sectional drawing of the state which inject | poured the foaming liquid.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Funnel body, 2 ... Backflow prevention funnel, 3 ... Nozzle, 4 ... Skin material

Claims (3)

An apparatus for producing a foam integrated with a skin, injecting into the skin material through a funnel body inserted into a bag-shaped skin material, and foam-molding integrally with the skin material,
A funnel for backflow prevention is detachably provided on the funnel body. The funnel for backflow prevention has a conical shape that fits into the base end of the funnel main body, and a conical shape that is integrated with the stop ring and inserted into the funnel main body. A skin comprising a cylindrical body portion and a thin tube portion disposed in the funnel body and extending at the tip of the cylindrical body portion, and the foaming liquid is injected by applying the nozzle to the backflow prevention funnel. Integrated foam manufacturing equipment. The skin-integrated foamed article according to claim 1, wherein a locking hole is formed in a base end portion of the funnel body, and a protrusion that locks in the locking hole is provided on the outer periphery of the ring stop of the backflow prevention funnel . Manufacturing equipment.   3. A skin-integrated foamed article according to claim 2, wherein a locking hole is formed in a base end portion of the funnel body, and a protrusion that locks in the locking hole is provided on the outer periphery of the stop ring of the backflow prevention funnel. Manufacturing equipment.

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