A single board ski board wood core and a method of making the same

Abstract

The application discloses a single-board ski board wooden plate core and a preparation method thereof. The wooden plate core comprises laminated and glued poplar wood strips and redwood wood strips, two redwood wood strips are arranged in a middle area of the plate core along a longitudinal direction of the plate core, the poplar wood strips are filled on both sides of the redwood wood strips and in a peripheral area, and the width of the wood strips is 5mm-25mm. The preparation method comprises the following steps: longitudinal cutting of logs, natural air drying, drying, moisture balance, cutting into strips, sanding, gluing, assembling, high-frequency hot pressing, thickness setting, and finishing, etc. The laminated combination of the poplar wood and the redwood wood can balance the light weight and the mechanical properties of the plate core, and meanwhile, the continuous penetrating texture with white and red color combination is formed, the appearance beauty and the sliding speed are obviously improved, and the plate core is suitable for the use of middle and high level skiers in the field with large slope and many curves.

Description

Technical Field

[0001] This invention relates to the field of snowboard processing technology, specifically to a wooden core for a snowboard and its preparation method. Background Technology

[0002] Snowboards are one of the core pieces of equipment in winter sports. Their structure typically employs a "sandwich" composite design, consisting of a top layer, core, bottom layer, and sidewalls. The core is the key component determining the snowboard's stiffness, resilience, weight, and ride feel. Traditionally, snowboard cores are made from a single type of wood or a combination of a few types of wood laminated together. Currently, the most commonly used wood species for snowboard cores in the global market include: poplar (lightweight and easy to work, but with relatively limited hardness and bending strength); paulownia (lightweight but with lower mechanical strength and insufficient abrasion resistance); and beech (high density, high bending strength, and good abrasion resistance, but relatively heavy).

[0003] In existing technologies, the main methods for assembling wooden core panels include: all-poplar wood spliced ​​core panels; poplar wood and paulownia wood spliced ​​core panels; and poplar wood and beech wood spliced ​​core panels. However, the above-mentioned existing technologies have the following technical problems:

[0004] First, the appearance is not aesthetically pleasing. The core of the existing skis is made of short strips of beech wood spliced ​​together. Because the beech wood strips are short and scattered, it is impossible to form a continuous and consistent grain pattern on the surface of the skis.

[0005] Secondly, it is difficult to reconcile density distribution with aesthetic requirements. Existing core materials either sacrifice strength and wear resistance in pursuit of lightweighting, or use high-density wood for local reinforcement but destroy the overall color harmony. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the above-mentioned technical difficulties and provide a wooden core for a snowboard and its preparation method, which can maintain the core density balance and mechanical properties, and also meet the aesthetic requirements of users.

[0007] To solve the above-mentioned technical problems, the technical solution provided by the present invention is as follows: a wooden core for a snowboard, characterized in that it comprises laminated poplar wood strips and red cedar wood strips; two red cedar wood strips are arranged longitudinally through the core in the middle area of ​​the core, and the poplar wood strips fill the sides and outer areas of the red cedar wood strips; the width of the wood strips is 5mm to 25mm.

[0008] As an improvement, the air-dry density of the poplar wood is 420 kg / m³. 3 The air-dry density of the red cedar wood is 680 kg / m³. 3 .

[0009] As an improvement, the core plate, with a moisture content of 6% to 12%, has a bending strength of 50 MPa, a maximum load of 1500 N, and an elastic modulus of 850 MPa.

[0010] A method for preparing a wooden core for a snowboard is also provided, comprising the following steps:

[0011] S1: Saw the poplar logs and red cedar logs longitudinally into planks;

[0012] S2: Allow the wooden board to air dry naturally until the moisture content drops to about 20%;

[0013] S3: Place the naturally air-dried wooden boards into the drying room and gradually raise the temperature to a maximum of 75℃ for drying;

[0014] S4: When the moisture content of the wood boards drops to 8% to 12%, slowly cool them down and remove them from the kiln, then transfer them to the raw material warehouse for moisture balancing.

[0015] S5: Cut the balanced wooden board into strips with a width of 5mm to 25mm, and then plan and sand them.

[0016] S6: Apply water-based splicing adhesive to the splicing surface of the wood strips and assemble the blanks as follows: Arrange two whole pieces of red cedar wood strips longitudinally in the middle, and fill the sides and the perimeter with poplar wood strips;

[0017] S7: Place the assembled blanks in a high-frequency splicing machine, apply vertical pressure from top to bottom and lateral splicing pressure, and cure the adhesive by high-frequency heating;

[0018] S8: A horizontal slitting machine is used to cut the glued thick plates into core substrates with a thickness of more than 5mm.

[0019] S9: The core substrate is processed to have straight edges and straight ends and sanded to obtain the finished core substrate.

[0020] As an improvement, the gradual heating rate is 5°C / day, and the maximum temperature of 75°C is maintained at a constant temperature for 48 hours.

[0021] As an improvement, the slow cooling rate is 3°C / hour, and the humidity balancing time is 7 days.

[0022] As an improvement, the application amount of the water-based panel adhesive is 180–220 g / m². 2 .

[0023] As an improvement, the high-frequency splicing machine has a high-frequency power of 15-20kW, a heating time of 3-5 minutes, a vertical pressure of 0.8-1.2MPa, and a lateral splicing pressure of 0.5-0.8MPa.

[0024] As an improvement, the adhesive is kept under pressure and cooled for 5 minutes after curing.

[0025] As an improvement, the sanding process is performed using a sanding belt with a mesh size of 120 or higher.

[0026] The advantages of this invention compared to the prior art are:

[0027] The aesthetic appeal is significantly enhanced. The bright red of the red cedar and the bright white of the poplar create a striking two-tone effect, greatly improving the visual appeal of the wooden core. Two solid strips of red cedar wood run through the entire ski, forming continuous, flowing lines on the surface. This creates a visually appealing sense of speed and momentum during skiing, resolving the issue of discontinuous appearance caused by existing short, spliced ​​cores.

[0028] The mechanical properties and density distribution are well-balanced. Poplar wood has a density of 420 kg / m³. 3 Red cedar wood has a density of 680 kg / m³. 3 The combination of two types of wood maintains the overall density balance of the wood core while providing sufficient bending strength and load-bearing capacity through the red cedar wood running through the frame. With a core moisture content of 6%–12%, the bending strength reaches 50 MPa, the maximum load is 1500 N, and the modulus of elasticity is 850 MPa, meeting the safety requirements of intermediate and advanced skiers on steep slopes with many curves. Attached Figure Description

[0029] Figure 1 This is a flowchart of a method for preparing a wooden core for a snowboard according to the present invention. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. Example 1

[0031] A type of snowboard with a wooden core, made of a combination of poplar and red cedar wood laminated together.

[0032] Timber raw material: Poplar wood from Henan Province (air-dry density 420 kg / m³) 3 ) and red cedar wood from Henan Province (air-dry density 680 kg / m³) 3 ).

[0033] The preparation steps are as follows:

[0034] (1) The poplar logs and the red cedar logs were longitudinally sawn into boards with a thickness of 30mm;

[0035] (2) Place the wooden boards in a well-ventilated and dry place to air dry naturally for 30 to 45 days, so that the moisture content drops to about 20%;

[0036] (3) After the wood is air-dried, it is put into the wood drying room and the temperature is gradually increased at a rate of 5℃ / day. The maximum temperature is controlled at 75℃ and kept constant for 48 hours to kill insect eggs and allow deep moisture to migrate to the surface.

[0037] (4) When the moisture content of the wood board drops to 8% to 12%, it is cooled slowly at a rate of 3℃ / hour. After being removed from the kiln, it is transferred to the raw material warehouse for 7 days to balance.

[0038] (5) Cut the balanced wooden board into strips with a width of 15mm and a thickness of 8mm using a precision band saw. The red cedar wood strips are cut according to the length of the whole board (about 1500mm), and the white poplar wood strips are cut according to the corresponding length.

[0039] (6) Use a four-sided planer and a wide-band sander to plan and sand the wood strips to ensure that the thickness tolerance of the wood strips is controlled within ±0.1mm;

[0040] (7) Use a two-component water-based splicing adhesive (solid content approximately 50%, pH value 6-8) to apply 180-220 g / m² of adhesive to the splicing surface of the wood strips. 2 Apply glue evenly; assemble the board according to the following structure: two red cedar wood strips are arranged parallel to each other on both sides of the longitudinal center line of the board core, with a spacing of 60mm; poplar wood strips are filled on both sides and the outer area of ​​the red cedar wood strips, and the total width is consistent with the design width of the ski board core.

[0041] (8) The assembled billet is fed into the high-frequency splicing machine. The high-frequency power is set to 15-20kW, the heating time is 3-5 minutes, the vertical pressure is 0.8-1.2MPa, the lateral splicing pressure is 0.5-0.8MPa, and the pressure is maintained and cooled for 5 minutes after the adhesive has cured.

[0042] (9) A horizontal slitting machine is used to cut the hot-pressed large thick plate into core substrates with a thickness of 6.5 mm;

[0043] (10) The core substrate is precisely cut with straight edges and straight ends, and then the surface is polished with 180-mesh sandpaper to obtain the finished core substrate;

[0044] (11) Inspect the finished core board: moisture content 10%, bending strength 50MPa, maximum load 1500N, elastic modulus 850MPa, no defects in appearance, dimensions meet design requirements, and after passing inspection, package and put into storage. Example 2

[0045] The difference from Example 1 is that the width of the wood strips is 8mm, the red cedar wood strip is arranged in a single strip running through the longitudinal center line of the core (suitable for narrow boards), and the poplar wood strips fill the sides. The remaining process parameters are the same as in Example 1. Example 3

[0046] The difference from Example 1 is that the width of the wood strips is 22mm, the width of the red cedar wood strips is 20mm and two are arranged in parallel, and the width of the poplar wood strips is 22mm to fill both sides. The vertical pressure during high-frequency hot pressing is 1.0~1.5MPa. The remaining process parameters are the same as in Example 1.

[0047] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A wooden core for a snowboard, characterized in that: It includes laminated poplar wood strips and red cedar wood strips; two red cedar wood strips are arranged longitudinally through the core of the board in the middle area, and the poplar wood strips fill the sides and the outer area of ​​the red cedar wood strips; the width of the wood strips is 5mm to 25mm.

2. The wooden core of the snowboard according to claim 1, characterized in that: The air-dry density of the poplar wood is 420 kg / m³. 3 The air-dry density of the red cedar wood is 680 kg / m³. 3 .

3. The wooden core of a snowboard according to any one of claims 1 or 2, characterized in that: The core plate, with a moisture content of 6% to 12%, has a bending strength of 50 MPa, a maximum load capacity of 1500 N, and an elastic modulus of 850 MPa.

4. A method for preparing a wooden core for a snowboard, characterized in that, Includes the following steps: S1: Saw the poplar logs and red cedar logs longitudinally into planks; S2: Allow the wooden board to air dry naturally until the moisture content drops to about 20%; S3: Place the naturally air-dried wooden boards into the drying room and gradually raise the temperature to a maximum of 75℃ for drying; S4: When the moisture content of the wood boards drops to 8% to 12%, slowly cool them down and remove them from the kiln, then transfer them to the raw material warehouse for moisture balancing. S5: Cut the balanced wooden board into strips with a width of 5mm to 25mm, and then plan and sand them. S6: Apply water-based splicing adhesive to the splicing surface of the wood strips and assemble the blanks as follows: Arrange two whole pieces of red cedar wood strips longitudinally in the middle, and fill the sides and the perimeter with poplar wood strips; S7: Place the assembled blanks in a high-frequency splicing machine, apply vertical pressure from top to bottom and lateral splicing pressure, and cure the adhesive by high-frequency heating; S8: A horizontal slitting machine is used to cut the glued thick plates into core substrates with a thickness of more than 5mm. S9: The core substrate is processed to have straight edges and straight ends and sanded to obtain the finished core substrate.

5. The preparation method according to claim 1, characterized in that, The gradual heating rate is 5°C / day, and the maximum temperature of 75°C is maintained at a constant temperature for 48 hours.

6. The preparation method according to claim 1, characterized in that, The slow cooling rate is 3°C / hour, and the humidity balancing time is 7 days.

7. The preparation method according to claim 1, characterized in that, The application rate of the water-based plywood adhesive is 180–220 g / m². 2 .

8. The preparation method according to claim 1, characterized in that, The high-frequency splicing machine has a high-frequency power of 15-20kW, a heating time of 3-5 minutes, a vertical pressure of 0.8-1.2MPa, and a lateral splicing pressure of 0.5-0.8MPa.

9. The preparation method according to claim 1, characterized in that, After the adhesive has cured, maintain pressure and cool for 5 minutes.

10. The preparation method according to claim 1, characterized in that, The sanding process is performed using a sanding belt with a mesh size of 120 or higher.

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