Please select the most similar patent number from A, B, C and D. Which number is?
A wood milling machine comprises a compression device (10), the compression device (10) comprising an upper roller (11) and a lower roller (12) rotating in opposing directions, there being a gap between the upper roller (11) and the lower roller (12). Compression of wood between the upper roller (11) and the lower roller (12) yields wood fiber (80c) without destroying the structure thereof. The performance of synthetic wood made from processed fiber is approximately equivalent to that of real wood. A system for the production of synthetic wood comprising the milling machine and a process utilizing said system requires no addition of formaldehyde to produce synthetic wood, reduces the cost thereof, and is energy efficient and environmentally friendly.
A: An artificial board, comprising a surface layer, and a core layer (32). The surface layer comprises an upper surface layer (31), and a lower surface layer (33); the surface layer contains an adhesive accounting for 3-8 wt% of the surface layer, additives accounting for 0-10 wt% of the surface layer, and the balance of straw shavings; the percentage of straw shavings incapable of passing through a 12-mesh sieve in the total weight of the straw shavings of the surface layer is highest. The core layer (32) contains an adhesive accounting for 2-8 wt% of the core layer, additives accounting for 0-10 wt% of the core layer, and the balance of wooden shavings; the percentage of wooden shavings capable of passing through a 40-mesh sieve and incapable of passing through a 60-mesh sieve in the wooden shavings of the core layer is highest. According to the artificial board, crop straws are mixed with wood for manufacturing the artificial board, so that the problem of wood resource shortage in China is effectively solved; meanwhile, part of wood raw material is added, so that the raw material structure of the artificial board can be effectively improved, thereby improving the quality of the artificial board.
B: Provided is a device used for compacting a softwood into a hardwood, comprising a compaction frame (2), a heating system, a pressing assembly, and a hot pressing plate (1). The pressing assembly is arranged on the upper part of the compaction frame (2), the hot pressing plate (1) is arranged on the lower part of the compaction frame (2), and the pressing assembly moves downward and applies pressure to the hot pressing plate (1). The hot pressing plate (1) is a thermally conductive material, and the heating system is connected to the hot pressing plate (1) and transfers heat to same. The hot pressing plate (1) comprises a plate body (10) and a press board (11). A rectangular groove (12) used for placing wood is arranged on the upper surface of the plate body (10), and the side wall of the groove (12) is provided with a tube hole (15) used for removing cooling water. The press board (11) is arranged above the plate body (10), and the press board (11) can move vertically by means of a sliding mechanism arranged on the compaction frame (2); during use, the press board (11) presses downward from the plate body (10) and engages, such that the groove (12) forms a sealed space. The device has a simple structure, is low-cost, has good compaction performance, and is highly efficient to produce; the compacted wood material is robust, high-strength, and highly resistant to wear, and has a high endurance.
C: Disclosed is a method for producing a density distribution-controllable compressed and densified solid wood panel, comprising: adjusting the water content of each layer in the thickness direction of a solid wood panel to form a dry area and a wet area in the thickness direction of the interior of the solid wood panel, wherein a yield stress difference between the dry area and the wet area is 0.2 MPa or more; adjusting the position distribution of the dry area and the wet area; and then performing compression using a hot press to form a high-density compressed layer in the wet area of the solid wood panel, so as to obtain a density distribution-controllable compressed and densified solid wood panel. The present invention can perform precise compression on a solid wood panel, such that the position distribution of a densified layer and an uncompressed layer of the wood panel is precise and controllable. In addition, the present invention features excellent mechanical properties and size stability, thereby further improving the quality of a compressed wood panel.
D: A wood strip cutter comprises an upper combing roller (1) and a lower combing roller (2). The upper combing roller comprises an upper rotating shaft (5) and an upper cutter (8) disposed on the upper rotating shaft. The lower combing roller comprises a lower rotating shaft (6) and a lower cutter (9) disposed on the lower rotating shaft. The upper cutter and the lower cutter are respectively a concave cutter and convex cutter respectively formed by multiple concave blades and multiple convex blades, the concave blades of the upper cutter and the convex blades of the lower cutter being correspondingly meshed with each other. The cutters having multiple meshed concave and convex blades distributed in intervals enable continuous cutting of wood sheets and other plant straws into wood strips, guarantees production continuity, and enhances cutter durability. Additionally, the cutters can be replaced in a timely manner in case of local abrasions or other damages. Different combinations can produce wood strips of different widths according to needs, thereby enabling versatility and durability. The invention is suitable for production, and effectively guarantees the continuity and uniformity of the wood strip making and paving of wood wool structural boards.
Answer: D