KR100807194B1 - Mold for headrest - Google Patents

Abstract

A foaming mold for forming a urethane headrest is provided to supply a vertically inserting mold structure and to improve convenience of injecting plastic material and drawing a product out by forming a large cavity in a lower mold and by installing a carrier opened at a hinge and a lifting device of an upper mold. A foaming mold for forming a urethane headrest comprises the followings: a lower mold(10) including accommodating part(11) accommodating a remaining portion except a bottom surface of a headrest pad(61) to be formed perfectly, and an upper opening(13); an upper mold(20) including a closing part forming a cavity conforming with a shape of the headrest pad to be formed by closing the upper opening of the lower mold, and at least one inserting part(29) being inserted by a stay(63) attached to a headrest frame(65); and a stay fixing unit fixing the headrest frame by pressing the stay penetrated the inserting part and exposed to an upper direction. The stay fixing unit comprises a sleeve covering the stay exposed to the upper direction of the upper mold, and formed with a nut part, a bolt connected to the nut part of the sleeve, and a rotating unit fastening and unfastening the bolt.

Description

Foam mold for headrest urethane molding {MOLD FOR HEADREST}

The present invention relates to a mold for forming a pad of a vehicle headrest made of a material such as foamed polyurethane foam,

In particular, when the upper and lower molds for the headrest forming the horizontal lay the pads, the parting lines are formed on the side of the headrest pads because they have a cavity structure corresponding to half of the pads. In comparison

(The conventional mold can be called ['Horizontal insert mold structure']),

Since the lower mold of the mold according to the present invention has a receiving portion that completely receives the remaining portion except for the lower portion of the headrest pad to be molded,

(The mold according to the present invention can be referred to as ['vertical insert mold structure'])

Parting line is formed around the lower surface of the headrest pad

The present invention relates to a foam mold for urethane molding for headrest urethane, which is expected to be markedly improved because productivity is not displayed externally even when the pad is covered without removing the parting line.

Conventionally, the headrest molding die is registered in the patent registration of Daeyu Airtech Co., Ltd. No. 0659688 (December 13, 2006) of `` Production apparatus for automobile headrest '', and Utility Model Registration No. 0400637 of Daeyu Airtech Co., Ltd. (2005.11.01) As shown in Fig. 5 of the `` Manufacture mold opening and closing device of the headrest for automobiles '',

The manufacture of a headrest including two stays, which are inserted into the vehicle chair body and formed with plunging grooves to enable stepwise height adjustment, inserts the frame horizontally into a mold, and foam pads following injection of polyurethane foam resin. The ejection of the headrest combined with the mold is also horizontally demolded.

Each of the upper and lower molds has a cavity corresponding to half of the headrest pad to be molded.

Thus, in the conventional 'horizontal' insertion mold structure corresponding to the 'vertical' insertion mold structure of the present invention

A thin film, such as a thin convex line or a fin, is formed at a place where the molded article is in contact with a mold, and such a parting line is inevitably used in a mold for a headrest. It is formed along the perimeter.

The formed parting line must be removed so that it does not sneak from the outside when the cover of leather or textile material is covered, and the inevitable post-treatment process causes a decrease in productivity.

Accordingly, the present invention is to provide a novel 'vertical' insertion mold structure to exclude the parting line removal process, to form a receiving portion that can completely accommodate the remaining portion other than the lower portion of the headrest pad to be molded in the lower mold, A headrest frame having an upper mold having an opening of the lower mold and a closing portion forming a cavity matching the shape of the pad to be molded, and pressing the stay of the headrest exposed through the insertion portion of the upper mold to the upper portion It is an object of the present invention to provide a foam mold for urethane molding headrest incorporating a stirrer fixing means.

In another aspect, the present invention introduces a bolt and nut to the upper mold upper surface as an adjustment member that can adjust the degree of insertion of the stay in the headrest stay insertion portion of the upper mold, and pressurized and fixed the stay as the headrest frame fixing means It is an object of the present invention to provide a foam mold for molding a headrest urethane incorporating a cylindrical cylinder and a plunger.

Furthermore, the present invention introduces a vertical carrier for each of the upper and lower molds, each carrier is opened and closed around the hinge, the upper carrier is provided with a lifting means of the upper mold for the convenience of polyurethane resin injection and molding and demolding It is an object of the present invention to provide a foam mold for molding a headrest urethane.

In addition, the present invention provides a foam mold for urethane molding of the headrest formed on the lower surface of the closed portion of the upper mold with a gush to prevent the polyurethane resin from flowing into the slot of the headrest frame in which the stay slides for the angle adjustable headrest. It aims to do it.

In addition, an object of the present invention is to provide a foaming mold for urethane molding for headrest urethane molding having an upper and lower mold structure in which the molding of the headrest pad formed in the vertical direction is easily performed and there is no problem in molding.

In order to achieve the above object, the foam mold for molding a headrest urethane according to the present invention includes a lower mold having a receiving portion and an upper opening for completely receiving the remaining portion except the lower portion of the headrest pad to be molded; An upper mold having a closing portion forming a cavity matching the shape of the pad to be formed by covering the opening of the lower mold and at least one insertion portion into which the stay provided in the headrest frame is fitted; And stair fixing means for fixing the headrest frame by pressing the stay of the headrest exposed through the insertion part of the upper mold.

In addition, the foam mold for urethane headrest molding according to the present invention is wrapped around the stay exposed to the top of the upper mold mold, the sleeve is formed with a nut, the bolt coupled to the nut of the sleeve, and loosen the bolt The tightening includes turning means,

Further, the turning means is a cylinder arranged in the upper mold upper surface portion, a plunger accommodated in the cylinder, a lever including a turning arm coupled with the bolt, and the turning arm of the lever is interlocked with the forward and backward movement of the plunger It is preferable to include a restraining member.

Alternatively, the stirrer fixing means may include a cylinder arranged at the upper mold upper surface portion, a plunger accommodated in the cylinder, and a branch pin provided at the end of the plunger.

In addition, the stay insertion portion of the upper mold is preferably provided with an insertion degree adjusting member of the stay consisting of a nut into which the stay is inserted and an adjusting bolt coupled to the nut.

Furthermore, the foam mold for urethane headrest molding according to the present invention is further provided with a vertical carrier hinged to the upper and lower mold outer, the upper carrier is provided with a lifting means for the upper mold, the resin (foaming) It is desirable to ensure the ease of the raw material injection) -foaming- demolding process.

In addition, the foam mold for urethane headrest molding according to the present invention is formed in the lower portion of the upper portion of the upper mold for the angle control headrest is formed in contact with the slot of the headrest frame shell,

The upper portion of the lower mold receiving portion is preferably formed with a first inclined portion inclined toward the receiving portion, a stepped portion of the upper portion of the first inclined portion, and a second sloped portion of the upper portion of the upper portion.

When the headrest is manufactured through the foam mold for urethane molding of the headrest according to the present invention, the parting line is formed around the lower surface of the pad. Due to the fact that it is difficult to observe the uneven part of the cover, in particular, the bottom of the cover covered with the pad is generally formed with a sewing line, so the finished headrest due to the parting line can be indistinguishable from the part without the parting line. Therefore, the time and labor consumption due to the removal of the parting line can be reduced, which can dramatically increase productivity.

In addition, in order to immediately introduce the 'vertical insertion mold structure' of the present invention at the manufacturing site, the headrest stay fixing means, the stay insertion control member, the upper and lower carriers combined with the upper and lower molds, the upper mold lifting means, etc. Applicability and practicality are high.

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

In each of the drawings, the same reference numerals, in particular, the tens and ones digits, or the same digits, tens, ones, and alphabets refer to members having the same function, and unless otherwise specified, each reference in the drawings. The member referred to may be regarded as a member conforming to these criteria.

In describing the foam mold (M) for the headrest urethane molding according to the present invention, if the direction reference is specified with reference to FIGS. 1 and 2,

The upper and lower sides are divided according to the gravity direction, and in relation to the mold M, the mold provided with the receiving part 11 capable of receiving the pad 61 of the headrest 60 to be molded as a whole is the lower side, and the opposite side thereof. To the top,

Regarding the headrest 60, the stay 61 will face downward when it is installed in the vehicle chair, and the stay 61 side is set downward, and the pad 61 side is set upward.

In the drawing, as the headrest 60 manufactured by Daewon Industrial Co., Ltd., registered in Korean Patent Registration No. 0328732 (2002.03.05) `` Automotive Headrest Angle Adjusting Device, ''

It is shown that the structure reflects the technology, such as a pole latch, an angle adjusting device including a plurality of latching portion is inserted into the insertion portion of the pole latch and the guide for guiding the pole latch insertion portion is formed,

Appearance formation related to [Frame 65 + Stay 63 combination] except for pad 61 to be foamed with polyurethane foam is registered with Patent No. 0580331 of Taekwang Corporation (2006.05.09) 『Headrest foam molding method And the device 'can be found in FIG. 5.

In the present specification, [A] of FIG. 2 schematically shows the angle adjusting assembly A of the frame 65 of the headrest 60, and is shown in the enlarged circle “C1” of FIG. In the bottom view of FIG. 60, it can be seen that a slot 65b is formed on the bottom surface of the outer surface 65a of the frame 65 in which the pad 61 is formed to ensure the movement guide of the stay 63.

The foam mold (M) for urethane molding headrest according to the present invention is a cavity in which the upper and lower molds 20 and 10 and the upper and lower carriers 50 and 40, and the headrest frame 65 are formed by engaging the upper and lower molds ( C) (see [b] in FIG. 2), in particular, it comprises a stirrer fixing means 30 for fixing the stay so as to float in the air.

First, the lower mold 10 having a receiving portion 11 to completely receive the remaining portion except for the lower portion of the pad 61 of the headrest 60 to be molded, which is contrasted with the conventional headrest mold and forms the core of the present invention. silver

For the ease of demoulding the headrest, the shape of the accommodating part 11 considers the angle between the stay 63 and the pad 61 in the existing general headrest 60.

The stays 63 are arranged in an inclined shape, and the lower surface portion 61a of the pad 61 of the headrest 60 (see circle "C1" enlarged in [D] in FIG. 2) is also inclined. To be molded,

The remaining pad 61 part is easily demolded in the process of lifting the upper mold 20 vertically by the lifting means 51 including the cylinder 51A.

In addition, as shown in Figures 2, 4 and 5 for the manufacture of such a headrest,

When the upper and lower molds are engaged, the boundary between the upper opening 13 of the lower mold 10 and the closing portion 21 (see FIG. 2A) of the upper mold 20 is the headrest pad lower surface. It is inclined to fit the shape of the part 61a.

(Ie, the opening 13 of the lower mold 10 and the lower surface 23 of the closing portion 21 of the upper mold 20 are inclined for the inclined headrest pad lower portion, respectively).

Next, in FIGS. 2, 4, and 5, the first inclined portion 15 inclined toward the accommodating portion 11 around the opening 13 to an upper portion of the accommodating portion 11 of the lower mold 10. The stepped portion 16 of the upper portion of the first slope portion and the second sloped portion 17 of the upper portion of the stepped portion are sequentially formed.

Furthermore, each of the first inclined portion 15 and the stepped portion 16 has a substantially uniform section length.

The second inclined portion 17 is to allow the upper surface portion 18 and the planar portion 28 of the upper mold 20 to be horizontally engaged.

The section length gradually increases from the lowest section 17a to the highest section 17b (see FIG. 2A).

Each of the opening 13, the first inclined portion 15, the stepped portion 16, the second inclined portion 17, and the upper surface portion 18 of the lower mold 20

Each of the closed lower surface portion 23, the corresponding first inclined portion 25, the corresponding stepped portion 26, the corresponding second inclined portion 27, and the corresponding flat portion 28 of the upper mold 20 correspond to each other. To take shape and to interlock.

It ensures the movement of the upper mold 20 to be moved up and down vertically, thereby ensuring the ease of demoulding the finished headrest.

Subsequently, the upper mold 20 forms a cavity C (see FIG. 2B) that matches the shape of the headrest pad 61 to be formed by covering the opening 13 of the lower mold 10. Has a closure 21,

The headrest 60 has an insert 29 into which the stay 63 coupled with the frame 65 is fitted.

The insert is formed in two to fit the two stays in the conventional headrest,

As mentioned above, when viewed from the state in which the upper and lower molds 20 and 10 are coupled, the stay insert 29 of the upper mold is inclined away from the vertical.

In addition, in Figure 5, the upper mold 20, the lower portion (23) of the closing portion 21 is formed with a gush 23a,

This ensures a slide of the stay 63 formed in the shell 65a of the headrest frame 65 in which the angle adjusting assembly A (see [C] of FIG. 2) is embedded (see FIG. 2). [C] in reference to the circle "C1") to prevent the polyurethane resin from flowing into the frame 65 through the slot.

In FIG. 5, the unexplained reference numeral 23b is also a hatching, but the hatching 23b formed in a form orthogonal to the hatching 23a is not essential.

Next, in FIGS. 1 to 3, the upper and lower molds 20 and 10 have upper and lower carriers 50 and 40, respectively.

Each carrier 40, 50 is connected by a hinge 41, the combined state can be fixed firmly by a manual or electric clamp 43, and also for manual opening of the upper carrier 50 or resin A handle 53, which is used to guide the injection, is provided on the upper carrier 50.

On the other hand, opening and closing means including a pneumatic or hydraulic cylinder as shown in Utility Model Registration No. 0400637 may be introduced to open the upper carrier 50 automatically.

The upper carrier 50 is provided with a means for vertically raising and lowering the upper mold 20,

The elevating means 51 is composed of a pneumatic or hydraulic cylinder 51A, a plunger 51B connected to the upper mold, and a guide bar 51C.

When the [frame 65 + stay 63 combination] of the headrest 60 is mounted in the mold M, the upper mold 20 is lifted using the lifting means 51 and automatically or manually. In the state that the upper and lower carriers 50 and 40 open the hinge 41 to the shaft,

The stay 63 is inserted into the closing portion 21 of the upper mold 20.

Hold the stay through the stirrer fixing means 30 (see FIGS. 3A and 3B), and inject the polyurethane foam resin into the lower mold 10 receiving portion 11,

The upper and lower carriers 50 and 40 are coupled again, the clamp 43 is fixed, and the upper mold 20 is lowered through the elevating means 51, and then the foam is aged. 61) is formed.

At this time, the frame 65 of the headrest 60, in particular the means 30 for securing the stay 63, is shown in FIG. 3A (in particular, the enlarged circle “C2” in FIG. 3A (the schematic part). Top view) and “C3” (rough front view)),

It is inserted into the insertion portion 29 of the upper mold 20 and surrounds the stay 63 exposed to the top, and is coupled to the sleeve 37A having a nut portion 35b and a nut portion 37b of the sleeve. Bolts 35A, and pivoting means for tightening the bolts so that the tip of the bolts presses the stay 63 and, when loosened, the headrest 60 can be pulled out from the upper mold and separated.

In particular, the turning arm 35B is coupled to the bolt 35A to configure the lever 35 for the convenience of turning the bolt 35A,

The turning means for turning and turning the turning arm 35B of the lever 35 to loosen and tighten the bolt includes a pneumatic or hydraulic cylinder 31, a plunger 33 accommodated in the cylinder, and a turning arm of the lever. It is preferable to include a restraining member to be interlocked according to the forward and backward movement so as to enable the fixation and release of the automated headrest stay.

The restraining member may be implemented in various forms, but in view of the fact that the contact point of the plunger performing linear motion and the lever turning arm making pivotal motion is different, the simple restraint protrusion 33a ( 33b) was introduced to be positioned in front and rear of the lever 35.

On the contrary, in the foam mold M for forming the headrest urethane molding shown in FIG. 3ab, the fixing means 30 (in particular, the enlarged circle “C5” (see schematic partial plan view) of FIG. 3b) is different from FIG. 3a).

It consists of a pneumatic or hydraulic cylinder 31 arranged on the upper surface of the upper mold 20, a plunger 33 accommodated in the cylinder, and a branch pin 135 provided at the end of the plunger,

As the plunger 33 moves, the branch pin 135 presses the stay 63 of the headrest exposed upward through the insertion portion 29 of the upper mold 20.

In the cavity C formed by the engagement of the upper and lower molds, the frame 65 may float in the air without falling (if necessary, the contact surface of the branch pin 135 with the stay 63 is frictionally resistant. Resistance member consisting of a heat-resistant wear-resistant pad of silicon or FRP material can be introduced).

In addition, as can be seen in the enlarged circle "C4" of FIG. 3A and FIG. 3B (schematic cross-sectional view, the sleeve 37A arranged in an inclined form upright), the upper mold 20 In one of the stay (63) insert 29 of

Regardless of the stay 63, which varies in length depending on the type of headrest,

And regardless of the frame 65 of various positions and sizes arranged in the pad 61

The stay insertion degree adjusting member 37 is provided so that the frame 65 stays at a predetermined position in the cavity C.
Of course, the insertion degree adjusting member may be provided in one, some, or both of the inserts, when there are a plurality of stay inserts.

The adjusting member 37 is composed of a sleeve (37A) formed with a nut (37a) so that the stay 63 is inserted, and an adjusting bolt (37B) coupled to the nut,

In addition, a fixing bolt 37C for fixing the adjusting bolt 37B is further coupled to the sleeve.

As described above, the headrest urethane molding foam mold (M) according to the present invention is a headrest pad forming process in order as shown in Fig. 2 [a] to [d] while the upper and lower molds and the upper and lower carriers are opened.

That is, in mounting the [frame 65 + stay 63 combination] of the headrest 60 in the mold M, the stay 63 of the headrest 60 is mounted on the upper mold 20 and the closing part 21. Inserting part 29 of the

By actuating the cylinder 31 of the stirrer fixing means 30, the bolt 35A (in the case of FIG. 3A) or the branching pin 135 (in the case of FIG. 3B) of the lever 35 is removed as the plunger 33 protrudes. Press the stay 63,

Injecting the raw material, that is, polyurethane foam resin ([A] step),

Automatically or manually causing the upper and lower carriers 50 and 40 to close the hinge 41 axially and to fill the clamp 43,

Subsequently, by lowering the upper mold 20 by using the elevating means 51, the upper and lower molds are engaged with each other to be molded.

After foaming aging ([b] step)

After releasing the stabilization means 30 again, the upper mold 20 is lifted up using the elevating means 51 ([d] step),

Lift the upper carrier and then complete the demolding manually or automatically (step [d]).

The opening and closing of the upper and lower carriers apart from the initial setting may be omitted,

Then, a release agent is applied to the upper and lower molds 20 and 10 closing part 21, the lower part 23 and the inner part 11 of the accommodating part 11 for the cavity C for the next molding.

In the above description, the well-known techniques related to the mold, the release agent, the specification of the foamed polyurethane foam, and the headless angle adjusting assembly, etc. are omitted, but those skilled in the art will naturally be able to infer and deduce it.

In addition, in the above description of the present invention with reference to the accompanying drawings, a mold having a particular shape and structure, but the present invention can be variously modified and changed by those skilled in the art, such modifications and changes are the scope of protection of the present invention Should be interpreted as belonging to.

Foam mold for molding the headrest urethane according to the present invention can increase the productivity in the production of the headrest, and has a reality that can be immediately applied to the production site.

In addition, it can be applied to the production of angle-controlled headrests or shock-sensitive headrests, which have recently been introduced for the convenience and safety of the driver, and are suitable for manufacturing various deformation and improved headrests.

1 is an external perspective view of a foam mold for urethane molding headrest according to the present invention;

Figure 2 is a cross-sectional view of the upper and lower molds and the upper and lower carriers of the foam mold for urethane molding headrest according to the present invention,

Figure 3a is a perspective view mainly showing the headrest stay fixing means of the upper mold and the stay insertion degree adjusting member,

Figure 3b is a perspective view showing a headrest stay fixing means different from Figure 3a,

4 is a plan view of the receiving portion of the lower mold,

5 is a bottom view of the closure of the upper mold.

<Description of the symbols for the main parts of the drawings>

M: Mold C: Cavity

10: lower mold 11: receiving portion

13: opening 15: first inclined portion

16: step 17: second inclined portion

18: upper part 20: upper mold

21: Closed part (not shown) 23: Lower part

23a, 23b: hatching 25: Corresponding first slope

26: corresponding step portion 27: corresponding second slope portion

29: inserting portion 30: stay fixing means

31: cylinder 33: plunger

35: fixing member 37: insertion accuracy adjusting member

40: lower carrier 41: hinge

43: clamp 50: upper carrier

51: lifting means 53: steering wheel

60: headrest 61: pad

63: stay 65: frame

Claims (10)

A lower mold having an accommodating portion and an upper opening for completely accommodating the remaining portion except the lower portion of the headrest pad to be molded; An upper mold having a closing portion forming a cavity matching the shape of the pad to be formed by covering the opening of the lower mold and at least one insertion portion into which the stay provided in the headrest frame is fitted; And Steering means for fixing the headrest frame by pressing the stay of the headrest exposed to the upper through the insertion portion of the upper mold; Foam mold for urethane molding headrest made, including. The method of claim 1, wherein the fixing means is A sleeve surrounding the stay exposed to the upper mold upper portion, the sleeve formed with a nut, A bolt coupled to the nut portion of the sleeve, and Foam mold for urethane molding the headrest, characterized in that it comprises a turning means for loosening and tightening the bolt. The method of claim 2, wherein the pivot means A cylinder arranged on the upper mold upper surface portion, A plunger housed in the cylinder, A lever including a turning arm coupled with the bolt, and Foaming mold for the headrest urethane molding, characterized in that it comprises a restraining member for interlocking the turning arm of the lever in accordance with the forward and backward movement of the plunger. According to claim 1, wherein the stay insert of the upper mold The foam mold for urethane molding headrest, characterized in that the stay is inserted and the nut is formed in the sleeve, and the insertion degree adjusting member of the stay consisting of the adjustment bolt is coupled to the nut. The method of claim 4, wherein The sleeve mold foam mold for urethane molding, characterized in that the fixing bolt for fixing the adjustment bolt is coupled to the sleeve. The method according to any one of claims 1 to 5, The upper and lower molds are further provided with a vertical carrier hinged to each other, The upper carrier is a foam mold for urethane molding headrest, characterized in that the lifting means for the upper mold is provided. The method according to any one of claims 1 to 5, The outer shell of the headrest frame is an assembly for adjusting the angle, the lower portion of the outer shell is formed for the stay, The foam mold for urethane molding of the headrest, characterized in that the lower portion of the upper mold is formed with a beetle in contact with the slot of the outer shell of the headrest frame. The method of any one of claims 1 to 5, wherein the upper portion of the receiving portion of the lower mold A first inclined portion inclined toward the accommodation portion, A stepped portion above the first inclined portion, and The foam mold for urethane molding a headrest, characterized in that the second inclined portion of the upper stepped portion is formed in sequence. The method of claim 8, The opening of the lower mold is inclined for the inclined headrest pad lower part, Each of the first inclined portion and the stepped portion has a uniform section length as a whole. The second inclined portion of the foam mold for forming the headrest urethane molding, characterized in that gradually increasing the length of the section from the lowest section to the highest section to form an upper surface portion engaging with the lower planar portion of the upper mold. The method according to any one of claims 1 to 5, When viewed from the upper and lower molds are coupled, the mold insert for the headrest urethane molding, characterized in that the stay insert of the upper mold is formed in an inclined form off the vertical.

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