CN205466595U - Piano board - Google Patents
Piano board Download PDFInfo
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- CN205466595U CN205466595U CN201620224871.6U CN201620224871U CN205466595U CN 205466595 U CN205466595 U CN 205466595U CN 201620224871 U CN201620224871 U CN 201620224871U CN 205466595 U CN205466595 U CN 205466595U
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- piano plate
- piano
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- reinforced composite
- surface layer
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Abstract
The utility model discloses a piano board, including the compound surface course of the fiber reinforcement on solid board core and upper and lower surface, be equipped with the tie coat between the compound surface course of fiber reinforcement on solid board core and upper and lower surface, the compound surface course of fiber reinforcement is formed by the one -way fiber reinforced thermoplastic resin preimpregnation of multilayer material hot -pressing composite, the tie coat is the non -woven fabrics, is piano board's thickness 15mm 40mm. The utility model discloses a piano board adopts the combined material that comprises the one -way fiber reinforced thermoplastic resin preimpregnation of multilayer material as the surface course, strengthens traditional wood piano board core, can promote piano board's intensity and rigidity by a wide margin, reduces the blastic deformation in the use, guarantees dimensional stability, and the while is being satisfied under the prerequisite of operation requirement, can reduce pure wood piano board's thickness, reduce cost, and the reduction is to ligneous dependence.
Description
Technical field
This utility model relates to a kind of piano plate, is specifically related to a kind of fiber reinforcement piano plate.
Background technology
Timber is required the strictest by piano plate.Including material and dimensional stability etc..In piano plate production process, the amount of deflection size under the moisture content of plank (< 8%) and External Force Acting is estimated.Avoid during life-time service, the problem such as soundboard deformation that soundboard moisture content is too high or material is bad, intensity difference etc. causes, cacology.
Disclosing a kind of stratiform piano plate in patent 201410604814.6, it uses the timber layer of the unlike materials such as Lignum paulowniae, Pinus koraiensis and kahikatea, and whole piano plate includes 5 layers of timber layer, and interlayer uses adhesive bonding.Although this patent uses certain degree between different timber layer, improve the service life of piano plate, but because the physical property differences such as the water absorption rate of timber layer of unlike material, transforming by external force amount cause piano plate in use, there will be layering or the problem such as accuracy in pitch deviation is big, reduce the service life of piano plate.Stratiform piano plate energy transmission when vibration simultaneously, loss are more much bigger than wooden sound board, so the piano manufactured with stratiform piano plate, the sound attenuating sent is fast, does not has solid wood piano plate sounding persistently, and tone color is melodious.
The quality of solid wood piano plate and dimensional stability are substantially better than stratiform piano plate, but the thickness of solid wood piano plate is thicker, relatively costly, and exist and permanent use the problem such as yielding under environment.
Utility model content
For solving the problem that above-mentioned existing piano plate exists, the purpose of this utility model is to provide a kind of piano plate, and this piano plate has the intensity and rigidity being obviously improved, it is ensured that the dimensional stability in life-time service environment.
This utility model is to be achieved through the following technical solutions:
A kind of piano plate, fiber-reinforced composite surface layer including solid wood board core and upper and lower surface, it is provided with tack coat between described solid wood board core and the fiber-reinforced composite surface layer on upper and lower surface, described fiber-reinforced composite surface layer is to be strengthened thermoplastic resin prepreg hot pressing by multilamellar unidirectional fibre to be composited, described tack coat is non-woven fabrics, and the thickness of described piano plate is 15 mm-40mm.
Wherein, described solid wood board core is solid Pinus koraiensis wood, Lignum paulowniae or kahikatea wood, and its thickness is 10mm-30mm.
Wherein, the thickness of described fiber-reinforced composite surface layer is 0.25mm ~ 4.0mm.
Preferably, described fiber-reinforced composite surface layer is to be strengthened thermoplastic resin prepreg by 2 layers of unidirectional fibre to be composited by the ply sequence hot pressing of [0 °/90 °] or [90 °/0 °].
Preferably, described fiber-reinforced composite surface layer is to be strengthened thermoplastic resin prepreg by 3 layers of unidirectional fibre to be composited by [90 °/0 °/90 °] or [0 °/90 °/0 °] ply sequence hot pressing.
Wherein, described non-woven fabrics is needle punched non-woven fabrics or spun-laced nonwoven fabric, and surface density is 30g/m2-80g/m2。
Piano plate described in the utility model is according to GB/T17657-2013(4.7) standard record MOR be 70MPa-110MPa, quiet bent modulus is 7000MPa-9000MPa.
Piano plate described in the utility model is under 1kg load, and placing the deflection after 24h is 0.05 mm-0.2mm.
Piano plate of the present utility model, use the composite being made up of multilamellar unidirectional fibre enhancing thermoplastic resin prepreg as surface layer, traditional solid wood piano plate core is strengthened, intensity and the rigidity of piano plate can be substantially improved, reduce the blastic deformation during using, it is ensured that dimensional stability, simultaneously on the premise of satisfied use requires, the thickness of pure solid wood piano plate can be reduced, reduce cost, reduce the dependency to timber.
Accompanying drawing explanation
Fig. 1 is the structural representation of piano plate of the present utility model；
Wherein, 1, solid wood board core；2, fiber-reinforced composite surface layer；3, tack coat.
Detailed description of the invention
Further illustrating this utility model below by detailed description of the invention, following example are this utility model preferably embodiment, but embodiment of the present utility model is not limited by following embodiment.
Embodiment one:
As it is shown in figure 1, a kind of piano plate, including the fiber-reinforced composite surface layer 2 on solid wood board core 1 and upper and lower surface, being provided with tack coat 3 between described solid wood board core 1 and the fiber-reinforced composite surface layer 2 on upper and lower surface, the thickness of described piano plate is 31.2mm.Described solid wood board core 1 is solid Pinus koraiensis wood, and thickness is 30mm；Described fiber-reinforced composite surface layer 2 is to be strengthened thermoplastic resin prepreg by 2 layers of unidirectional fibre to be composited by the ply sequence hot pressing of [0 °/90 °], thickness is 0.6mm, it is glass fiber reinforcement COPP sheet material that described unidirectional fibre strengthens thermoplastic resin prepreg, its content of glass fiber is 50%, and melt index is 10g/10min；Described tack coat is needle punched non-woven fabrics, and surface density is 70g/m2；Fiber-reinforced composite surface layer 2 and the tack coat 3 on upper and lower surface are combined by hot pressing, are formed by hot-press solidifying with the solid wood board core 1 being coated with adhesive (such as phenolic resin) after being combined.Use GB/T17657-2013(4.7) in method of testing, characterize the MOR of piano plate and quiet bent modulus, recording the MOR of piano plate in the present embodiment is 90MPa, quiet bent modulus is 8000MPa, under 1kg load, placing the deflection after 24h is 0.2mm, and after load is removed, deformation can recover.
Embodiment two:
As it is shown in figure 1, a kind of piano plate, including the fiber-reinforced composite surface layer 2 on solid wood board core 1 and upper and lower surface, being provided with tack coat 3 between described solid wood board core 1 and the fiber-reinforced composite surface layer 2 on upper and lower surface, the thickness of described piano plate is 21.8mm.Described solid wood board core 1 is solid Pinus koraiensis wood, and thickness is 20mm；Described fiber-reinforced composite surface layer 2 is to be strengthened thermoplastic resin prepreg by 3 layers of unidirectional fibre to be composited by the ply sequence hot pressing of [0 °/90 °/0 °], thickness is 0.9mm, it is glass fiber reinforcement COPP sheet material that described unidirectional fibre strengthens thermoplastic resin prepreg, its content of glass fiber is 60%, and melt index is 25g/10min；Described tack coat is spun-laced nonwoven fabric, and surface density is 60g/m2.The fiber-reinforced composite surface layer 2 on upper and lower surface and tack coat are combined by hot pressing, are formed by hot-press solidifying with the solid wood board core 1 being coated with adhesive (such as phenolic resin) after being combined.Use GB/T17657-2013(4.7) in method of testing, characterize the MOR of piano plate and quiet bent modulus, recording the MOR of piano plate in the present embodiment is 95MPa, quiet bent modulus is 7500MPa, under 1kg load, placing the deflection after 24h is 0.2mm, and after load is removed, deformation can recover.
Embodiment three:
As it is shown in figure 1, a kind of piano plate, including the fiber-reinforced composite surface layer 2 on solid wood board core 1 and upper and lower surface, being provided with tack coat 3 between described solid wood board core 1 and the fiber-reinforced composite surface layer 2 on upper and lower surface, the thickness of described piano plate is 26.8mm.Described solid wood board core 1 is solid Lignum paulowniae layer, and thickness is 25mm；Described fiber-reinforced composite surface layer 2 is to be strengthened thermoplastic resin prepreg by 3 layers of unidirectional fibre to be composited by the ply sequence hot pressing of [0 °/90 °/0 °], thickness is 0.9mm, it is glass fiber reinforcement COPP sheet material that described unidirectional fibre strengthens thermoplastic resin prepreg, its content of glass fiber is 45%, and melt index is 25g/10min；Described tack coat is spun-laced nonwoven fabric, and surface density is 50g/m2.The fiber-reinforced composite surface layer 2 on upper and lower surface and tack coat are combined by hot pressing, are formed by hot-press solidifying with the solid wood board core 1 being coated with adhesive (such as phenolic resin) after being combined.Use GB/T17657-2013(4.7) in method of testing, characterize the MOR of piano plate and quiet bent modulus, recording the MOR of piano plate in the present embodiment is 100MPa, quiet bent modulus is 9000MPa, under 1kg load, placing the deflection after 24h is 0.1mm, and after load is removed, deformation can recover.
Claims (6)
1. a piano plate, it is characterized in that, fiber-reinforced composite surface layer including solid wood board core and upper and lower surface, it is provided with tack coat between described solid wood board core and the fiber-reinforced composite surface layer on upper and lower surface, described fiber-reinforced composite surface layer is to be strengthened thermoplastic resin prepreg hot pressing by multilamellar unidirectional fibre to be composited, described tack coat is non-woven fabrics, and the thickness of described piano plate is 15mm-40mm.
Piano plate the most according to claim 1, it is characterised in that: described solid wood board core is solid Pinus koraiensis wood, Lignum paulowniae or kahikatea wood, and its thickness is 10mm-30mm.
Piano plate the most according to claim 1, it is characterised in that: the thickness of described fiber-reinforced composite surface layer is 0.25mm ~ 4.0mm.
Piano plate the most according to claim 3, it is characterised in that: described fiber-reinforced composite surface layer is to be strengthened thermoplastic resin prepreg by 2 layers of unidirectional fibre to be composited by the ply sequence hot pressing of [0 °/90 °] or [90 °/0 °].
Piano plate the most according to claim 3, it is characterised in that: described fiber-reinforced composite surface layer is to be strengthened thermoplastic resin prepreg by 3 layers of unidirectional fibre to be composited by [90 °/0 °/90 °] or [0 °/90 °/0 °] ply sequence hot pressing.
Piano plate the most according to claim 1, it is characterised in that: described non-woven fabrics is needle punched non-woven fabrics or spun-laced nonwoven fabric, and surface density is 30g/m2-80g/m2。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620224871.6U CN205466595U (en) | 2016-03-23 | 2016-03-23 | Piano board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620224871.6U CN205466595U (en) | 2016-03-23 | 2016-03-23 | Piano board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205466595U true CN205466595U (en) | 2016-08-17 |
Family
ID=56651986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620224871.6U Active CN205466595U (en) | 2016-03-23 | 2016-03-23 | Piano board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205466595U (en) |
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2016
- 2016-03-23 CN CN201620224871.6U patent/CN205466595U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |