JP3776237B2 - Skin integrated foaming mold - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a skin-integrated foam-molding die for molding a foamed urethane sheet pad having an insert on the back surface and a skin on the surface.
[0002]
[Prior art]
As shown in FIG. 3, the lid of the passenger seat airbag using the foam-integrated urethane foam seat pad used for the instrument panel for automobiles has a foamed urethane 9 interposed between the insert 7 and the skin 10. This is due to the seat pad W, and the insert 7 is provided with a hinge portion 12 and the insert 7 and the skin 10 are provided with a break line portion 13 to improve the appearance so that they cannot be seen from the surface. When the airbag is deployed, as shown in FIG. 4 , the insert 7 and the skin 10 are normally broken by the breaking line portion 13 so that the lid is opened with the hinge portion 12 as a hinge.
[0003]
[Problems to be solved by the invention]
Cutting the rupture line portion 13 of the V-shaped working with the epidermis 10 of the hinge portion 12, although the process by pressing a generally heated knife or the like, the machining depth amount is controlled by pressing amount of cutlery For this reason, the processing may become incomplete as the thickness of the skin 10 varies. If the cut processing of the skin 9 is incomplete and the thickness of the remaining skin 10 exceeds a specified value, the airbag lid does not open. In addition, when the skin 10 is thin and the skin 10 is cut after the V-shape processing, the urethane 9 leaks during integral foaming.
[0004]
An object of the present invention is to provide a skin-integrated foaming mold in which the rupture line portion of the skin is appropriately processed without being affected by the thickness of the skin and the formation of defective products is prevented.
[0005]
[Means for Solving the Problems]
Gist of the present invention for achieving the above object, the integral skin foam molding mold for molding the seat pad of the injection to urethane foam urethane between the insert and the skin in the upper and lower molds, the urethane In the upper mold, a cutting blade is formed in the upper mold to move back and forth in the direction of the lower mold and V-cut urethane and skin from the insert side of the seat pad to form a break line. an electrode for confirming the forward movement of the cutting edge is disposed on the lower surface of the skin, the cutting edge is provided with a conduction check unit, further comprising a power confirmation unit via an aND circuit to the electrode It is a feature.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is an upper mold | type and 2 is a lower mold | type.
[0007]
In the upper mold 1, a cylinder 3 and a cutting blade 5 that moves forward and backward in the direction of the lower mold 2 by a piston 4 in the cylinder 3 are provided.
[0008]
Further, the lower die 2 is provided with an electrode 6 at a portion corresponding to the forward / backward movement position of the cutting blade 5, and this electrode 6 is connected to an energization confirmation unit 14 via an AND circuit 11 as shown in FIG. The cutting blade 5 is connected to the energization confirmation unit 14.
[0009]
Since the present invention has the structure as described above, the insert 7 is set in the upper mold 1. It is desirable to affix the sealing tape 8 to the break line portion 13 of the insert 7.
[0010]
Next, the outer skin 10 is set in the lower mold 2 and a urethane material is injected, and the upper mold 1 and the upper mold 1 are combined and heated, and the urethane material is inserted between the insert 7 and the outer skin 10 and the urethane 9 layer is inserted into the lower mold 2. And it foams integrally with the skin 10.
[0011]
After the urethane 9 is cured, the cylinder 3 is operated to move the cutting blade 5 forward, and the urethane 9 and the skin 10 are V-shaped by the cutting blade 5 to form a fracture line 13.
[0012]
At this time, by energizing the electrode 6 and the cutting edge 5, the V-shaped machining is confirmed by the energization confirmation unit 14. Therefore, when the energization confirmation unit 14 is not energized, it can be recognized that the cutting blade 5 is not cut in an appropriate amount. At that time, by correcting the stroke amount of the cutting blade 5, the proper amount of cutting can be obtained. To do.
[0013]
【The invention's effect】
As described above, according to the present invention, a cylinder provided in an upper mold in a skin-integrated foam molding mold for forming a foamed urethane seat pad by injecting urethane between an insert and a skin in an upper mold and a lower mold. By moving forward and backward in the direction of the lower die, urethane is cured from the insert side after the urethane is cured by the cutting blade , and the V-shaped machining of the fracture line part is performed on the skin, and the V-shaped machining status by this cutting blade Since the energization confirmation part is confirmed by energizing the cutting blade, it is possible to obtain V-shaped machining with an appropriate thickness without being affected by the thickness of the skin and to generate defective products due to urethane leakage. To prevent.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a foam integrated mold of the skin of the present invention. FIG. 2 is a cross-sectional view showing a V-shaped processing state with a cutting blade. FIG. 3 is a cross-sectional view of a urethane foam seat pad product. Sectional view with part of the seat pad open [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper mold | type 2 Lower mold | type 3 Cylinder 4 Piston 5 Cutting blade 6 Electrode 7 Insert 8 Sealing tape 9 Urethane 10 Skin 11 AND circuit 12 Hinge part 13 Breaking line part 14 Energization confirmation part

Claims (1)

In a skin-integrated foam molding mold in which urethane is injected between the insert and the skin in the upper mold and the lower mold to form a foamed urethane seat pad, the lower mold direction is set by a cylinder in the upper mold after the urethane is cured. the cutting edge urethane and epidermal moved forward and backward to the insert side of the seat pad to form a V-processed and broken lines provided above the lower mold the electrode to check the forward movement of the cutting edge A skin-integrated foaming mold, which is disposed on a lower surface of the skin, wherein the cutting blade includes an energization confirmation unit, and the electrode includes an energization confirmation unit via an AND circuit .

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