A 3D printed public seat and its manufacturing method
Through 3D printing technology, the public seats are printed layer by layer, and the solid structure is formed using gelled materials and fine aggregates, which solves the problems of waste and high processing costs of existing seat materials, and achieves low-cost, maintenance-free and efficient production seat manufacturing.
Patent Information
- Application Number
- CN202111385035.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-11-22
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2041-11-22
AI Technical Summary
The existing public seat materials have complex process, high cost, long processing cycle and waste of raw materials. 3D printing technology has not been widely used in public facilities supplies.
Using 3D printing technology, the integrated molded common seats are printed layer by layer using cementitious materials and fine aggregates, including chair legs, seat seats and backrests. The materials include ordinary silicate cement, white silicate cement, sulfur aluminate cement, magnesium cement and engineering discarded soil. The solid body structure is formed by layer-by-layer printing.
It achieves low cost, maintenance-free, short processing cycle, high production efficiency and saving raw materials. The printed seats are easy to re-treat and beautify, reducing customization and maintenance costs, and solving the problem of waste of raw materials.
Smart Images
Figure CN113854763B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a public facility product, in particular to a 3D printed public seat; in addition, the present invention also relates to a method for manufacturing the 3D printed public seat. Background Art
[0002] At present, the seats used in some public places such as parks, stadiums and museums are mainly made of materials such as marble, wood or metal. The seats made of these materials have disadvantages such as high professional requirements for the production process, high customization costs, long processing cycles and high maintenance costs. In addition, the process of producing seats using these materials is subtractive manufacturing, which inevitably results in waste of raw materials.
[0003] 3D printing technology, also known as additive manufacturing, has been widely used in a variety of fields, including aerospace and mechanical manufacturing, due to its unique and efficient intelligent design and processing capabilities, which are lacking in subtractive and isotropic manufacturing. In recent years, 3D printing has also gradually demonstrated its advantages in intelligent building manufacturing, with a continuous increase in new architectural products produced using 3D printing. 3D printing technology holds particularly broad application prospects for small, personalized buildings and products. However, 3D printing technology has not yet been widely adopted in public infrastructure. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a 3D printed public seat with low cost, maintenance-free, short processing cycle, high production efficiency and saving of raw materials.
[0005] In addition, the present invention also provides a method for manufacturing a 3D printed public seat.
[0006] The technical solution adopted by the 3D printed public seat of the present invention is: the 3D printed public seat of the present invention includes chair legs, a seat, and a backrest, the chair legs are located under the seat, the bottom of the backrest is connected to the seat and the chair legs respectively, and the chair legs, the seat and the backrest are printed layer by layer through a 3D printer to be integrally formed.
[0007] The bottom surface of the chair leg is a semicircular surface, the front end of the seat and the vertex of the semicircular surface are connected to form a diagonal support surface, the bottom edge of the backrest and the rear end of the semicircular surface form an arc surface, and the space between the area enclosed by the semicircular surface, the arc surface, and the diagonal support surface and the seat is a solid body formed by 3D printing material.
[0008] The backrest includes a backrest front, a backrest back, a pillow and a backrest crossbar. The pillow is located at the top, and the backrest crossbar is located in the middle and connects the backrest front and the backrest back at the front and back respectively to form a solid body with the chair legs and the seat.
[0009] The backrest cross bar includes an upper cross bar, a middle cross bar, and a lower cross bar. The back of the backrest includes an upper back side and a lower back side. The top of the upper back side is connected to the front side of the backrest through the pillow. The bottom of the upper back side is connected to the lower back side through the middle cross bar. The upper cross bar is located between the upper back side and the front side of the backrest, and the lower cross bar is located between the lower back side and the front side of the backrest.
[0010] The chair seat is rectangular.
[0011] The front side of the backrest, the upper back side and the lower back side are all arc-shaped.
[0012] The 3D printing materials used for the public seats include cementitious materials, fine aggregates, and engineering waste soil.
[0013] The cementitious material is one or more of ordinary Portland cement, white Portland cement, sulphoaluminate cement and magnesium cement.
[0014] The particle size of the fine aggregate is ≤0.6 mm, and the moisture content of the fine aggregate is 25-35%.
[0015] The water content of the engineering waste soil is 75-85%.
[0016] The technical solution adopted by the manufacturing method of the 3D printed public seat of the present invention is as follows: the 3D printed public seat includes chair legs, a seat, and a backrest, the chair legs are located below the seat, the bottom of the backrest is connected to the seat and the chair legs respectively, and the chair legs, the seat, and the backrest are integrally formed by printing layer by layer using a 3D printer; the manufacturing method of the 3D printed public seat of the present invention includes the following steps:
[0017] (1) drawing a three-dimensional graphic of the public seat on a 3D printer;
[0018] (2) Preparation of 3D printing materials;
[0019] (3) According to the three-dimensional figure, using the prepared 3D printing material, 3D printing the public seat by a 3D printer;
[0020] (4) Maintaining the public seats formed by 3D printing.
[0021] The compressive strength of the chair legs, the chair seat and the backrest are all above 10 MPa.
[0022] The bending strength of the chair legs, the chair seat and the backrest are all above 5 MPa.
[0023] The bottom surface of the chair leg is a semicircular surface, the front end of the seat and the vertex of the semicircular surface are connected to form a diagonal support surface, the bottom edge of the backrest and the rear end of the semicircular surface form an arc surface, and the space between the area enclosed by the semicircular surface, the arc surface, and the diagonal support surface and the seat is a solid body formed by 3D printing material.
[0024] The backrest includes a backrest front, a backrest back, a pillow and a backrest crossbar. The pillow is located at the top, and the backrest crossbar is located in the middle and connects the backrest front and the backrest back at the front and back respectively to form a solid body with the chair legs and the seat.
[0025] The backrest cross bar includes an upper cross bar, a middle cross bar, and a lower cross bar. The back of the backrest includes an upper back side and a lower back side. The top of the upper back side is connected to the front side of the backrest through the pillow. The bottom of the upper back side is connected to the lower back side through the middle cross bar. The upper cross bar is located between the upper back side and the front side of the backrest, and the lower cross bar is located between the lower back side and the front side of the backrest.
[0026] The seat is rectangular.
[0027] The front side of the backrest, the upper back side and the lower back side are all arc-shaped.
[0028] The 3D printing materials used for the public seats include cementitious materials, fine aggregates, and engineering waste soil.
[0029] The cementitious material is one or more of ordinary Portland cement, white Portland cement, sulphoaluminate cement and magnesium cement.
[0030] The particle size of the fine aggregate is ≤0.6 mm, and the moisture content of the fine aggregate is 25-35%.
[0031] The water content of the engineering waste soil is 75-85%.
[0032] The beneficial effects of the present invention are as follows: since the 3D printed public chair of the present invention includes chair legs, a seat, and a backrest, the chair legs are located under the seat, and the bottom of the backrest is respectively connected to the seat and the chair legs, and the chair legs, the seat and the backrest are printed layer by layer in one piece by a 3D printer; the present invention overcomes the defects and shortcomings of the prior art and adopts 3D printing technology to manufacture public chairs. Since the 3D printing materials used are cost-effective and do not require maintenance, and the printed seats are easy to surface reprocess and beautify, the processing and maintenance costs of the customized seats of the prior art are effectively reduced, and the technical problem of the prior art of waste of raw materials in the processing process is solved, which has very obvious economic benefits; therefore, the 3D printed public chair of the present invention has low cost, is maintenance-free, has a short processing cycle, high production efficiency, and saves raw materials.
[0033] The public seats manufactured by the manufacturing method of the 3D printing public seats of the present invention also have the above advantages. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 This is a schematic diagram of the overall structure of a 3D printed public seat according to an embodiment of the present invention;
[0035] Figure 2 This is a schematic side structural diagram of a 3D printed public seat according to an embodiment of the present invention. DETAILED DESCRIPTION
[0036] like Figure 1As shown, the 3D printed public chair of this embodiment includes chair legs 1, a seat 2, and a backrest 3. The chair legs 1 are located below the seat 2, and the bottoms of the backrest 3 are connected to the seat 2 and the chair legs 1 respectively. The chair legs 1, the seat 2 and the backrest 3 are printed layer by layer by a 3D printer to be integrally formed; specifically, the bottom surface of the chair leg 1 is a semicircular surface 4, and the front end of the seat 2 and the vertex of the semicircular surface 4 are connected to form a diagonal support surface 6, and an arc surface 5 is formed between the bottom edge of the backrest 3 and the rear end of the semicircular surface 4. The space between the enclosed area of the semicircular surface 4, the arc surface 5, and the diagonal support surface 6 and the seat 2 is a solid body formed by 3D printing material. In this embodiment, the chair legs are designed to be arched through the semicircular surface 4, the arc surface 5, and the diagonal support surface 6, which effectively gives play to the advantage of the arched structure in withstanding high compressive strength and also makes the chair The shape of the chair is more beautiful; the backrest 3 includes a backrest front 7, a backrest, a pillow 8 and a backrest crosspiece, the pillow 8 is located at the top, the backrest crosspiece is located in the middle, and is connected to the backrest front 7 and the backrest at the front and back, respectively, to form a solid body with the chair legs 1 and the seat 2, the backrest crosspiece includes an upper crosspiece 11, a middle crosspiece 12, and a lower crosspiece 13, the backrest includes an upper back surface 9 and a lower back surface 10, the top of the upper back surface 9 is connected to the backrest front 7 through the pillow 8, and the bottom of the upper back surface 9 is connected to the lower back surface 10 through the middle crosspiece 12, the upper crosspiece 11 is located between the upper back surface 9 and the backrest front 7, and the lower crosspiece 13 is located between the lower back surface 10 and the backrest front 7, the seat 2 is rectangular, and the backrest front 7, the upper back surface 9, and the lower back surface 10 are all arc-shaped.
[0037] The 3D printing materials used for the public seats include cementitious materials, fine aggregates, and engineering spoil. The cementitious materials are one or more of ordinary Portland cement, white Portland cement, sulfoaluminate cement, and magnesium cement. The particle size of the fine aggregate is ≤0.6 mm, the moisture content of the fine aggregate is 25-35%, and the moisture content of the engineering spoil is 75-85%.
[0038] This embodiment leverages 3D printing technology to fully leverage the high compressive strength and rapid setting and early strength of ordinary Portland cement, white Portland cement, sulphoaluminate cement, and magnesium cement used. This offers advantages such as fast molding, low manufacturing costs, and no waste of raw materials during the molding process. Furthermore, it is possible to design and print public seating with more complex structures according to specific usage requirements. The production process eliminates noise pollution and high-temperature hazards, and the surface treatment of printed seats that have not yet fully set can be performed, greatly facilitating the customized processing of seats for different usage requirements.
[0039] The manufacturing method of the 3D printed public seat of this embodiment includes the following steps:
[0040] (1) drawing a three-dimensional graphic of the public seat on a 3D printer;
[0041] (2) preparing 3D printing materials. Specifically, according to the requirements of 28d compressive strength greater than 20 MPa and 28d flexural strength greater than 5 MPa, prepare 3D printing materials (by weight) including 5 parts of white silicate cement, 10 parts of sulfoaluminate cement, 100 parts of magnesium cement, 120 parts of engineering waste soil, and 60 parts of sand;
[0042] (3) According to the three-dimensional graphics, the prepared 3D printing material is used to 3D print the public seat through a 3D printer, wherein the nozzle diameter of the 3D printer is selected according to the size of the public seat. In this embodiment, the nozzle diameter is 30 mm, the initial setting time and final setting time of the 3D printer are set to 140 min and 150 min respectively, the fluidity is 90 mm, and the entire printing is completed within 100 min;
[0043] (4) Carry out natural indoor air maintenance on the public seats formed by 3D printing.
[0044] After adopting the manufacturing method of this embodiment, the structural strength of each part reaches the following technical indicators: the compressive strength of the chair legs 1, the seat 2, and the backrest 3 are all above 10 MPa, and the bending strength of the chair legs 1, the seat 2, and the backrest 3 are all above 5 MPa. The specific data obtained through the test are: the 3d and 28d compressive strengths of the chair legs 1 are 18.3 MPa and 35.2 MPa respectively, and the 3d and 28d compressive strengths of the seat 2 are 11.7 MPa and 28.4 MPa respectively; the 3d and 28d three-point bending strengths of the chair legs 1 and the backrest 3 are 5.6 MPa and 11.4 MPa respectively, and the 3d and 28d three-point bending strengths of the seat 2 are 3.8 MPa and 8.2 MPa respectively.
[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the scope of protection of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.
[0046] The present invention overcomes the defects and shortcomings of the existing technology and adopts 3D printing technology to manufacture public seats. Since the 3D printing materials used are cost-effective and do not require maintenance, and the printed seats are easy to reprocess and beautify the surface, it effectively reduces the processing and maintenance costs of customized seats in the existing technology, and solves the technical problem of waste of raw materials in the processing process of the existing technology, and has very obvious economic benefits. Therefore, the 3D printed public seats of the present invention have low cost, no maintenance, short processing cycle, high production efficiency, and save raw materials. The manufacturing method of the 3D printed public seats of the present invention is used to manufacture public seats, which also has the above advantages.
[0047] The present invention can be widely applied in the field of public facilities.
Claims
1. A 3D printed public seat, characterized by: The invention comprises a chair leg (1), a seat (2) and a backrest (3), wherein the chair leg (1) is located below the seat (2), the bottom of the backrest (3) is connected to the seat (2) and the chair leg (1) respectively, and the chair leg (1), the seat (2) and the backrest (3) are integrally formed by printing layer by layer using a 3D printer; the bottom surface of the chair leg (1) is a semicircular surface (4), the front end of the seat (2) and the vertex of the semicircular surface (4) are connected to form a diagonal support surface (6), the bottom edge of the backrest (3) and the rear end of the semicircular surface (4) are connected to form a diagonal support surface (6), and the bottom edge of the backrest (3) and the rear end of the semicircular surface (4) are connected to form a diagonal support surface (6). The arc surface (5) is formed between the semicircular surface (4), the arc surface (5), the diagonal support surface (6) and the space between the seat (2) and the 3D printing material to form a solid body; the backrest (3) includes a backrest front (7), a backrest, a pillow (8) and a backrest crossbar, the pillow (8) is located at the top, the backrest crossbar is located in the middle, and is connected to the backrest front (7) and the backrest at the front and back, respectively, to form a solid body with the chair legs (1) and the seat (2); the backrest crossbar includes an upper crossbar (11 ), middle crossbar (12), lower crossbar (13), the back of the backrest includes an upper backside (9) and a lower backside (10), the top of the upper backside (9) is connected to the front side of the backrest (7) through the pillow (8), the bottom of the upper backside (9) is connected to the lower backside (10) through the middle crossbar (12), the upper crossbar (11) is located between the upper backside (9) and the front side of the backrest (7), and the lower crossbar (13) is located between the lower backside (10) and the front side of the backrest (7); the public seat adopts 3 The 3D printing materials include cementitious materials, fine aggregates, and engineering waste soil; the cementitious materials are one or more of ordinary Portland cement, white Portland cement, sulphoaluminate cement, and magnesium cement; the particle size of the fine aggregate is ≤0.6 mm, and the moisture content of the fine aggregate is 25-35%; the moisture content of the engineering waste soil is 75-85%; the compressive strength of the chair legs (1), the chair seat (2), and the backrest (3) is all above 10 MPa; and the bending strength of the chair legs (1), the chair seat (2), and the backrest (3) is all above 5 MPa.
2. The 3D printed public seat according to claim 1, characterized in that: The seat (2) is rectangular; the backrest front (7), the upper back (9), and the lower back (10) are all arc-shaped.
3. A method for manufacturing a 3D printed public seat according to claim 1 or 2, characterized in that: The following steps are involved: (1) drawing a three-dimensional graphic of the public seat on a 3D printer; (2) Preparation of 3D printing materials; (3) According to the three-dimensional figure, using the prepared 3D printing material, 3D printing the public seat by a 3D printer; (4) Maintaining the public seats formed by 3D printing.
Citation Information
Patent Citations
3D prints municipal park seat
CN206284666U
3D printing public chair
CN216961930U