A kind of high intensity PU seat and preparation method thereofTechnical field
The invention belongs to furniture item fields, and in particular to a kind of high intensity PU seat and preparation method thereof.
Background technique
Seat is a kind of common furniture, it requires soft comfortable, and high resilience is firm in structure, durable.With forefathersCommonly using timber and using joinery and its construction make seat, with social development, timber resources is gradually depleted, countryStart to forbid falling trees, therefore is badly in need of replacing timber to make seat using other materials.
PU material is a kind of novel high polymer material, and main component is polyurethanes, due to only needing simply to modifyFormula can be obtained the physical properties such as different density, elasticity, rigidity, have good service performance.It also has light, anti-The characteristics of fire, waterproof and anticracking, it is therefore widely used in seat production field.The seat of PU material production has preferable flexibilityAnd elasticity, when production, makes PU material in mold inside holding certain time, the knot of one layer of smooth rub resistance can be formed on surfaceSkin makes it have stronger lear energy.But PU seat still has that strength and stiffness are lower, if weightWhen biggish people takes, under biggish pressure, moderate finite deformation can occur for PU seat, be easy damage seat, cause personal injury.
Summary of the invention
In order to solve the problems, such as that PU seat intensity and rigidity are lower, the present invention provides a kind of high intensity PU seat and its systemsMake method.
For this purpose, the present invention adopts the following technical scheme:
A kind of high intensity PU seat, including chair framework, the outer layer of the chair framework have wrapped PU material, and chair framework is concealedIn PU material.
Further, the chair framework is metal material.
Further, the cross section of the chair framework is L-shaped.
A kind of production method of high intensity PU seat, includes the following steps:
(1) four uniformly distributed positioning screw holes are drilled out in the bottom of mold, and drills out two positioning screw holes in side；
(2) after the mental section of certain specification being carried out bending, punching, the chair framework of l-shaped is welded, is powered in chair frameworkPlate nano-paint；
(3) four location nuts horizontal and corresponding with positioning screw hole are welded and fixed in the bottom of chair framework, then at itTwo location nuts vertical and corresponding with positioning screw hole are welded and fixed in side；
(4) chair framework is placed in mold, positioning is then installed between mold and chair framework by each positioning screw holeScrew, and the inner cavity of chair framework and mold is made to stay a fixed spacing, then sealed mold；
(5) a certain amount of PU material is weighed, is injected into mold after agitated, removes each set screw after keeping the temperature 10~15min,And the PU seat for completing injection molding is removed from the molds；
(6) PU seat carries out deburring, and mounting seat examines storage.
Further, the preferred Q235 of the mental section.
Further, the preferred silver color of the nano-paint.
The beneficial effects of the present invention are:
1. the PU seat combines the flexibility of PU material and the rigidity of steel, the deflection of stress is reduced, seat is substantially increasedStrength and stiffness reduce the risk of seat damage, prevent personal injury's evil, extend the service life of seat；
2. steel skeleton is equipped with inside the PU seat, it is not only simple and beautiful but also sturdy and durable, it is fabulous wood substitutes,Timber usage amount is advantageously reduced, resource consumption is reduced；
3. the backrest of the seat is ergonomically designed to curve-like, comfort is improved, and sitting generation can be substantially reducedFeeling of fatigue.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of seat of the present invention；
Fig. 2 is the structural schematic diagram of chair framework of the present invention；
Fig. 3 is the side sectional view of Fig. 1；
Fig. 4 is the scheme of installation of chair framework in a mold；
In figure: 1- chair framework, 2-PU material, 3- location nut, 4- set screw, 5- mold.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings:
As shown in figures 1-4, a kind of high intensity PU seat, including the L shape chair framework 1 made of Q235 structural section, chair framework1 outer layer has wrapped PU material 2, and chair framework 1 is concealed in PU material 2.
As shown in figure 4, a kind of production method of high intensity PU seat, includes the following steps:
(1) four uniformly distributed positioning screw holes are drilled out in the bottom of mold 5, and drills out two positioning screw holes in side；
(2) after the Q235 profile of certain specification being carried out bending, punching, the chair framework 1 of l-shaped is welded according to design drawing,And the electrosilvering color nano-paint on the chair framework 1 being welded.
(3) four positioning horizontal and corresponding with the positioning screw hole of mold 5 are welded and fixed in the bottom of chair framework 1Nut 3, then two location nuts 3 vertical and corresponding with the positioning screw hole of mold 5 are welded and fixed in its side；
(4) chair framework 1 is placed in mold 5, is then installed between mold 5 and chair framework 1 by each positioning screw holeSet screw 4, and chair framework 1 and the inner cavity of mold 5 is made to stay a fixed spacing, to fill PU material 2, then sealed mold 5；
(5) a certain amount of PU material is weighed, is injected into after agitated in mold 5, removes each set screw after keeping the temperature 10~15min3, and the PU seat for completing injection molding is taken out from mold 5.
(6) PU seat carries out deburring, by 3 mounting seat of location nut of PU seat bottom, examines storage.
In the present invention, set screw 4 and the positioning screw hole of mold 5 are threadedly engaged, in use, first in each positioning of mold 5Set screw 4 is installed in screw hole, and stretches to the front end of set screw 4 in the inner cavity of mold 5.Then again by chair framework 1It is set in mold 5, and is threadedly coupled the end of each set screw 4 with the location nut on chair framework 1, in this way convenient for tuneThe gap of whole chair framework 1 and 5 inner cavity of mold, so that PU material can be fully wrapped around by chair framework 1.
In addition, the PU seat also needs the seat external fixing rack that matches with PU seat of installation, when installation, first outside seatMounting hole corresponding with location nut 3 is set on fixed frame, then fixed spiral shell is installed between mounting hole and location nut 3Silk, can install PU seat to seat external fixing rack.
It should be noted that the above is only the preferred embodiment of the present invention, it is noted that for the general of the artFor logical technical staff, without departing from the technical principles of the invention, several improvement and replacement can also be made, these changeIt also should be regarded as protection scope of the present invention into replacement.