CN101791838B

CN101791838B - Structure leading polyurethane foam product to be in magnetic lamination with iron surface and fabrication method

Info

Publication number: CN101791838B
Application number: CN 201010136910
Authority: CN
Inventors: 张伯龄
Original assignee: WUXI ZHENGCHANGSHENG PLASTIC DECORATICN CO Ltd
Current assignee: WUXI ZHENGCHANGSHENG PLASTIC DECORATICN CO Ltd
Priority date: 2010-03-31
Filing date: 2010-03-31
Publication date: 2013-04-03
Anticipated expiration: 2030-03-31
Also published as: CN101791838A

Abstract

The invention relates to a structure leading a polyurethane foam product to be in magnetic lamination with iron surface and a fabrication method, the structure comprises a powerful magnet and a woven fiber net for wrapping the powerful magnet, wherein the woven fiber net is almost shaped like a circular sheet, wraps the powerful magnet and gathers up from the periphery, and a thin iron wire is used for winding and tightening the gathering-up position for forming the structure like a bun. When foaming polyurethane, the woven fiber net is embedded therein for becoming a whole, thereby leading the powerful magnet to be very difficult to pull out from the polyurethane foam product. A magnetic positioning pin is used for firmly positioning the structure in a molding mold, and then the molding can be completed according to the conventional process steps.

Description

The structure of a kind of polyurethane foam product and iron surface magnetic lamination and preparation method

Technical field

The present invention relates to structure and its preparation method of a kind of polyurethane foam product and iron surface magnetic lamination.

Technical background

This class polyurethane foam product as shown in Figure 1 can have various moulding and color, such as the sign of cartoon figure, company or enterprise, mascot etc.This polyurethane foam product also can be held with a firm grip in hand, unclamp and hold with a firm grip, unclamp, and helping hands movement is to certain attractive of white collar.

Inlay a strong magnets at its lower surface place, can make these goods and iron surface securely magnetic sticker be combined.If allow this class polyurethane product observably " stand " on the car roof of travelling along the street, it then is a kind of good advertisement form.

In the technology that formerly has, strong magnets directly is embedded in the polyurethane foam product, and the naked leakage of an one magnetic pole surfaces is at the lower surface of polyurethane foam product, so as with iron surface for example the vehicle top shell fit.

But this structure that has first has a fatal defective: inadequate in conjunction with firmness between strong magnets and the polyurethane foam product.Because the strong magnets smooth surface, although be embedded in the polyurethane foam, the bonding force between them is also little, to such an extent as to children also can from foam, pluck out to gulp down in belly with the handgrip strong magnets, thereby bring about frightful disaster, bring disaster to this based article and be under an embargo.

Summary of the invention

The structure of polyurethane foam product provided by the invention and iron surface magnetic lamination, comprise a strong magnets, a braided fiber net that is used for this strong magnets of parcel, this braided fiber net initially roughly is disc, strong magnets is placed on its centre, the contact-making surface gluing of strong magnets and braided fiber net makes it mutual bonding, pocket around the braided fiber net is got up to close up, tightly twine with thin wire and to close up the place, formation is as the structure of steamed stuffed bun shape, but in strong magnets and close up the space of leaving between the place near the strong magnets diameter, purpose is to make the polyurethane foam that enters in this space abundant, the establishment fleece is fully opened in foam, increase the foam volume that contains in the establishment fleece.Such structure can make strong magnets and establishment fleece form a larger integral body of volume, again strong magnets can not have been plucked out separately, thereby overcome the defective that middle strong magnets that structure is arranged first and polyurethane foam are inlayed undercapacity.

Described strong magnets is round pie, and central authorities have a circular hole to be used for inserting alignment pin.

Described fiber knitted net roughly is disc before the parcel strong magnets, can be selected from following material: polyethylene fibre, polypropylene fibre, polyester fiber, acrylic fiber, vinylon fiber, nylon fiber, preferred nylon fiber.

Strong magnets lies in the central authorities of fiber knitted net, and both contact-making surfaces should coated with adhesive cling the two, so that the carrying out of next process.

When carrying out foamed process, need to use strong magnets dowel device of the present invention.Dowel device used in the present invention comprises a cylinder alignment pin and a location strong magnets.Described location strong magnets can be identical with the strong magnets in polyurethane foam product, also can be slightly different, but both central circular hole diameters must be consistent, in order to match with the cylinder alignment pin.

Owing to used the positioner with strong magnetic force, require the necessary ferromagnetic material of right and wrong of employed foaming molding mold, for example, aluminium alloy, stainless steel, etc.Described dowel device is embedded in the appropriate location of foaming molding mold, the cylinder alignment pin should protrude the surface of foaming molding mold, like this, when the central circular hole of the strong magnets in being embedded in polyurethane foam product is positioned the pin insertion, two strong magnets will tightly attract together mutually, can not move in molded process subsequently again.

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is the schematic diagram with a kind of polyurethane foam product of structure of the present invention.

Fig. 2 is the schematic diagram that strong magnets is bonded in braided fiber net central authorities.

Fig. 3 is the schematic diagram that the strong magnets that is bonded in braided fiber net central authorities is got up by the braided fiber pocket and closed up the place and twine with thin wire.

Fig. 4 is the schematic diagram that structure of the present invention is located at the frothing mold mould.

Wherein, 1-polyurethane foam product; The 2-strong magnets; 3-braided fiber net; The 4-thin wire; 5-frothing mold mould; The 6-alignment pin; 7-locates strong magnets; The 8-mould surface.

The specific embodiment

At first according to shown in Figure 2, be ready to fiber knitted net, then at the lower magnetic pole surface of strong magnets coated with adhesive, with the two bonding.

Wrap up described strong magnets with the braided fiber net, pocket around the braided fiber net is got up to close up, twine with thin very tight tight silk and close up the place, form the structure as the steamed stuffed bun shape.Note, in order to make after the fiber knitted net parcel strong magnets, to close up space between the magnetic pole table on the strong magnets, place enough large twining with thin wire, be convenient to hold more foam, the distribution area of increased fiber mesh grid in polyurethane foam will allow and be closed up the diameter that place's distance between the magnetic pole surfaces on the strong magnets approximately is equal to or slightly less than strong magnets by what thin wire twined.

In the appropriate location of mould, inlay and fix strong magnets dowel device of the present invention, make its cylinder alignment pin protrude die surface, the magnetic pole surfaces of strong magnets should be parallel to die surface.

The structure that braided fiber net of the present invention will be wrapped up the similar steamed stuffed bun shape of strong magnets is placed on the alignment pin of molding die, only need allow the strong magnets central circular hole that is prepared the fleece parcel and alignment pin be slidingly matched gets final product, because the magnetic that attracts each other reliably between strong magnets is fitted, thereby finish easily positioning process on molding die.

Below carry out the processing that the operations such as injection molding, matched moulds, heating, insulation are finished finished product according to routine.

Method of the present invention certainly also can enlarge and is applied in other plastic foam moulding articles of phenolic resins, Lauxite, polystyrene resin, vistanex etc.

Claims

1. the structure of a polyurethane foam product and iron surface magnetic lamination, comprise a strong magnets that is embedded in the polyurethane foam product, described strong magnets is patty, there is a circular hole in central authorities, and an one magnetic pole strength is positioned at the surface of described polyurethane foam product, it is characterized in that, comprise that also is used for wrapping up the braided fiber net of described strong magnets, pocket gets up to close up around the described braided fiber net, twines with thin wire and tightly closes up the place, forms the structure as the steamed stuffed bun shape; With described braided fiber net wrap up described strong magnets and around after pocket gets up to close up, tightly twine at thin wire and to close up the diameter that place's distance between the magnetic pole surfaces on the strong magnets approximately is equal to or slightly less than strong magnets, described braided fiber net roughly is disc before the parcel strong magnets.

2. the structure of polyurethane foam product as claimed in claim 1 and iron surface magnetic lamination is characterized in that, described braided fiber net centre and described strong magnets lower magnetic pole Surface Contact, and bond with binding agent.

3. the structure of polyurethane foam product as claimed in claim 1 and iron surface magnetic lamination, it is characterized in that described braided fiber net is selected from following material: polyethylene fibre, polypropylene fibre, polyester fiber, acrylic fiber, vinylon fiber, nylon fiber.

4. make the method for the structure of polyurethane foam product as claimed in claim 1 and iron surface magnetic lamination, described structure comprises a strong magnets that is middle round-meshed patty that is embedded in the polyurethane foam product, one is used for wrapping up the braided fiber net of described strong magnets, by being arranged on the fixing described structure of dowel device on the nonferromagnetic frothing mold mould, then carry out injection molding, matched moulds, heating, be incubated conventional operation, it is characterized in that, described dowel device comprises a cylinder alignment pin and is embedded in the location strong magnets on nonferromagnetic frothing mold mould surface, described cylinder alignment pin simultaneously with described structure in the strong magnets center hole and the center hole that is embedded in the location strong magnets in the nonferromagnetic frothing mold mould match, and two strong magnets tightly attract together mutually.

5. method as claimed in claim 4 also can enlarge in other plastic foam moulding articles that are applied to phenolic resins, Lauxite, polystyrene resin, vistanex.