CN210211382U - 3D printing apparatus of continuous fibers reinforcing silicon rubber - Google Patents
3D printing apparatus of continuous fibers reinforcing silicon rubber Download PDFInfo
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- CN210211382U CN210211382U CN201920983218.1U CN201920983218U CN210211382U CN 210211382 U CN210211382 U CN 210211382U CN 201920983218 U CN201920983218 U CN 201920983218U CN 210211382 U CN210211382 U CN 210211382U
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- speed reducer
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Abstract
The utility model discloses a 3D printing equipment of continuous fiber reinforced silicone rubber, which comprises a charging barrel, wherein a screw rod is sleeved in the charging barrel, a channel is formed between the charging barrel and the screw rod, the upper end of the charging barrel is connected with a speed reducer through a connecting piece, one end of the screw rod is connected with an output shaft of the speed reducer through a shaft coupling, the speed reducer is connected with a first stepping motor, a first through hole is arranged on the speed reducer, and a second through hole is arranged along the axial direction of the screw; the bottom of the charging barrel and the bottom of the screw form a cavity, the bottom end of the cavity is provided with a discharge hole, and the first through hole, the second through hole and the cavity are communicated; a feed pipe is arranged on one side of the charging barrel, the device also comprises an injector, the end of the outlet pipe of the injector is connected with the feed pipe, and the other end of the injector is connected with a driving device. The high-strength fiber reinforced silicone rubber composite material does not need to be manufactured before printing, so that the time and labor cost are reduced.
Description
Technical Field
The utility model belongs to the technical field of the 3D printing method, a 3D printing apparatus of continuous fibers reinforcing silicon rubber is related to.
Background
The 3D printer is based on extrusion raw materials, uses 3D design software to print out the 3D model with the product that draws, has advantages such as low in manufacturing cost, production cycle are short. The main chain structure of the silicon rubber is a polysiloxane structure, the chemical property of the silicon rubber is relatively stable, and the silicon rubber has a series of excellent characteristics of high temperature resistance, oxidation resistance, hydrophobicity, flexibility, permeability, good biocompatibility, no toxicity, no odor, no carcinogenesis and the like, and is widely accepted in the fields of medicine, machinery, automation and the like.
The existing silica gel 3D printer is usually obtained by improvement on the basis of a common 3D printing system, the blanking mode mainly depends on the gravity of a material or the action of piston extrusion force, the silicon rubber is extruded through a nozzle, and the printed material is rapidly photocured, so that a silicon rubber product is obtained. However, the existing silicone rubber 3D printing has the following problems: firstly, because the material self gravity and the piston extrusion force are smaller, the printed silicon rubber product has poor compactness, easy curling and poor dimensional stability. Secondly, with the rapid development of high and new technologies, various high-end equipment puts higher requirements on the service performance of the silicon rubber, but the mechanical strength and the notch tearing resistance of the silicon rubber are poor, so that the wide application of the silicon rubber material in the field of 3D printing is limited.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a 3D printing apparatus of continuous fibers reinforcing silicon rubber has solved the printing finished piece compactness that exists among the prior art poor, the easy problem of curling, dimensional stability difference.
The technical scheme adopted by the utility model is that, the 3D printing equipment of continuous fiber reinforced silicone rubber comprises a charging barrel, a screw rod is sleeved in the charging barrel, a channel is formed between the charging barrel and the screw rod, the upper end of the charging barrel is connected with a speed reducer through a connecting piece, one end of the screw rod is connected with an output shaft of the speed reducer through a shaft coupling, the speed reducer is connected with a first stepping motor, a tubular bushing is arranged in the speed reducer, one end of the tubular bushing extends out of the speed reducer, and a second through hole is formed; the bottom of the charging barrel and the bottom of the screw form a cavity, the bottom end of the cavity is provided with a discharge hole, and the tubular bushing, the second through hole and the cavity are communicated; one side of the charging barrel is connected with a feeding device;
the feeding device comprises an injector, an outlet pipe of the injector is communicated with the charging barrel, the feeding device also comprises a second stepping motor, an output shaft of the second stepping motor is connected with a screw rod, and one end of the screw rod is connected with a piston handle of the injector.
The utility model discloses a characteristics still lie in:
the feeding device further comprises a guide shaft, one end of the guide shaft is fixed on the second stepping motor, the other end of the guide shaft is fixed on the clamping frame, the piston handle of the injector is connected with the lead screw through a push plate, and the push plate is sleeved on the lead screw and the guide shaft simultaneously.
A feed pipe is arranged on one side of the feed cylinder and is communicated with an outlet pipe of the injector.
The injector is fixed by a clamping frame.
The connecting piece is a sleeve, and the speed reducer and the charging barrel are fixed in the sleeve.
The utility model has the advantages that: the 3D printing equipment of the utility model can increase the extrusion force of the silicon rubber raw material by using the combination of the injector and the screw extrusion, and the obtained silicon rubber part has good compactness and good dimensional stability; the continuous long fibers can be oriented and controlled in the silicone rubber, the comprehensive performance of a 3D printing part is effectively improved, a high-strength fiber reinforced silicone rubber composite material does not need to be manufactured before printing, and the time and labor cost are reduced.
Drawings
Fig. 1 is the utility model discloses a 3D printing apparatus's of continuous fibers reinforcing silicon rubber structure sketch map.
In the figure, 1, a charging barrel, 2, a screw rod, 3, a speed reducer, 4, a connecting piece, 5, a first stepping motor, 6, a first through hole, 7, a second through hole, 8, a cavity, 9, a discharging hole, 10, a feeding pipe, 11, an injector, 12, a second stepping motor, 13, a screw rod, 14, a guide shaft, 15, a clamping frame, 16, a push plate, 17, a working platform, 18, a heating resistor, 19, a tubular bushing, 20, a coupler, 21, a first connecting support, 22, a second connecting support, 23, a driving part, 23 and 24 are bearings.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The utility model provides a 3D printing apparatus of continuous fibers reinforcing silicon rubber, as shown in figure 1, including feed cylinder 1, screw rod 2 has been cup jointed in feed cylinder 1, form the passageway between feed cylinder 1 and the screw rod 2, feed cylinder 1 upper end is connected with reduction gear 3 through connecting piece 4, 2 one end of screw rod is passed through shaft coupling 20 and 3 output shaft of reduction gear, screw rod 2 upper end has cup jointed bearing 24, bearing 24 is located between screw rod 2 and the feed cylinder 1, feed cylinder 1 upper end, reduction gear 3 is connected with first step motor 5, first through-hole 6 has been seted up on the reduction gear 3, be provided with tubulose bush 19 in the first through-hole 6, tubulose bush 19 communicates with second through-hole 7, be used for preventing that the fibre from receiving other. A second through hole 7 is formed along the axial direction of the screw rod 2; the bottom of the charging barrel 1 and the bottom of the screw rod 2 form a cavity 8, the bottom end of the cavity 8 is provided with a discharge hole 9, and the first through hole 6, the second through hole 7 and the cavity 8 are communicated; a feeding pipe 10 is arranged on one side of the charging barrel 1, and the charging barrel 1 is connected with a feeding device through the feeding pipe 10;
the feeding device comprises an injector 11, an outlet pipe end of the injector 11 is connected with a feeding pipe 10, the feeding device also comprises a second stepping motor 12, an output shaft of the second stepping motor 12 is connected with a screw rod 13, and one end of the screw rod 13 is connected with a piston handle of the injector 11.
The utility model discloses a drive assembly 23 realizes the motion of 3D printing apparatus in X direction, Y direction and Z direction, and drive assembly 23 includes that X is to drive step motor, Y to drive step motor, Z to drive step motor and corresponding transmission. The driving member 23 is a common device, as long as it can realize the movement in the X direction, the Y direction and the Z direction, and is not limited herein. The driving stepping motor is any one of a permanent magnet stepping motor, a reaction stepping motor and a hybrid stepping motor; the embodiment adopts an A4982 type micro-step driving motor;
the syringe 11 is fixed by a holder 15. The stepping motor further comprises a first connecting support 21 and a second connecting support 22, wherein the second connecting support 22 is fixed on the driving part 23, and the first stepping motor 5 is fixed on the second connecting support 22 through the first connecting support 21.
The first stepping motor 5 and the second stepping motor 12 are any one of a 42 series stepping motor and a 57 series stepping motor; the stepping motor used in this embodiment is a 42-series two-phase stepping motor.
The driving device further comprises a guide shaft 14, one end of the guide shaft 14 is fixed on the second stepping motor 12, the other end of the guide shaft 14 is fixed on the clamping frame 15, a piston handle of the injector 11 is connected with the screw rod 13 through a push plate 16, the push plate 16 is sleeved on the screw rod 13 and the guide shaft 14, and the push plate 16 drives the piston handle of the injector 11 to reciprocate along the screw rod 13 and the guide shaft 14.
The connecting piece 4 is the sleeve, and reduction gear 3 and feed cylinder 1 stretch into from the sleeve both ends respectively, fixes reduction gear 3 and feed cylinder 1 in the sleeve through the screw.
The charging barrel comprises a charging barrel 1, and is characterized by further comprising a working platform 17, wherein the working platform 17 is located below the charging barrel 1, a heating resistor 18 is arranged on the working platform 17, and the working platform 17 is connected to a driving part 23.
The printing method of the 3D printing equipment for the continuous fiber reinforced silicone rubber comprises the following steps:
step 1, connecting a 3D printing device with a driving part 23;
The preparation process of the silicon rubber raw material is as follows:
firstly, adding the basic silica gel, the cross-linking agent, the catalyst and the reinforcing filler into a mixing container, and fully stirring for 1-5 min; after uniform mixing, the mixed material is put into a vacuum container for 1-4min to obtain the silicon rubber raw material.
The basic silica gel can be hydroxyl-terminated polysiloxane, methyl room temperature vulcanized silicone rubber and the like, the cross-linking agent can be tetraethoxysilane, oligomer hydrosilicon compound and the like, the catalyst can be dibutyltin laurate, zinc-based tin, a Kaster catalyst, chloroplatinic acid and the like, and the reinforcing filler can be carbon black, calcium carbonate, lignin and the like.
When the base silica gel, the cross-linking agent, the catalyst and the reinforcing filler are mixed, a certain thickening agent is added, so that the forming capability of 3D printing of the silicon rubber raw material can be improved.
the continuous fiber may be carbon fiber, glass fiber, aramid fiber, basalt fiber, polybenzimidazole fiber, polyimide fiber, boron fiber, optical fiber, metal fiber, etc., and the fiber selected in this embodiment is aramid fiber.
and 5, driving the 3D printing equipment through the driving part 23 to deposit the continuous fiber reinforced silicone rubber composite material on the working platform 17 for printing and forming to obtain a workpiece, and heating the continuous fiber reinforced silicone rubber composite material on the working platform 17 through the heating resistor 18 to enable the temperature of the continuous fiber reinforced silicone rubber composite material to be higher than 23 ℃, so that the continuous fiber reinforced silicone rubber composite material is rapidly subjected to a crosslinking reaction to form an elastomer with certain strength and toughness.
after printing is finished, cutting off continuous fibers, and putting the workpiece into an oven at 80 ℃ for 2 hours or 100 ℃ for 1 hour to completely cure the workpiece;
after printing is finished, firstly, the injector 11 is fully cleaned, then basic silica gel with smaller molecular weight is added into the injector 11, injected into the charging barrel 1 and extruded out through the screw 2; the above cleaning process is repeated a plurality of times.
Through the mode, the 3D printing equipment of the utility model can increase the extrusion force of the silicon rubber raw material by using the injector and the screw extrusion together, and the obtained silicon rubber part has good compactness, difficult curling and good dimensional stability; the continuous long fibers can be oriented and controlled in the silicone rubber, the comprehensive performance of a 3D printing part is effectively improved, a high-strength fiber reinforced silicone rubber composite material is not required to be manufactured before printing, and the time and labor cost are reduced; the utility model discloses a 3D printing apparatus's printing method, as required change fibre kind (wire, basalt fiber, carbon fiber, glass fiber, aramid fiber etc.), fibre diameter, fibre mark (the rerum natura parameter is different) to obtain that comprehensive properties is excellent, functional strong, customizable 3D prints the finished piece; changing the color of the article by changing the color of the silicone rubber or continuous fibers; through the optimized combination of the silicone rubber with different characteristics and the continuous long fiber, the printed product is endowed with the characteristics of richer and stronger functionality.
Claims (5)
1. The 3D printing equipment for the continuous fiber reinforced silicone rubber is characterized by comprising a charging barrel (1), wherein a screw (2) is sleeved in the charging barrel (1), a channel is formed between the charging barrel (1) and the screw (2), the upper end of the charging barrel (1) is connected with a speed reducer (3) through a connecting piece (4), one end of the screw (2) is connected with an output shaft of the speed reducer (3), the speed reducer (3) is connected with a first stepping motor (5), a tubular bushing (19) is arranged in the speed reducer (3), one end of the tubular bushing (19) extends out of the speed reducer (3), and a second through hole (7) is formed in the axial direction of the screw (2); a discharge hole (9) is formed in the bottom of the charging barrel (1), and the tubular bushing (19), the second through hole (7) and the discharge hole (9) are communicated; one side of the charging barrel (1) is connected with a feeding device;
the feeding device comprises an injector (11), an outlet pipe of the injector (11) is communicated with the charging barrel (1), the feeding device further comprises a second stepping motor (12), an output shaft of the second stepping motor (12) is connected with a screw rod (13), and one end of the screw rod (13) is connected with a piston handle of the injector (11).
2. The 3D printing equipment for the continuous fiber reinforced silicone rubber according to claim 1, wherein the feeding device further comprises a guide shaft (14), one end of the guide shaft (14) is fixed on the second stepping motor (12), the other end of the guide shaft (14) is fixed on a clamping frame (15), a piston handle of the injector (11) is connected with the screw rod (13) through a push plate (16), and the push plate (16) is sleeved on the screw rod (13) and the guide shaft (14) at the same time.
3. 3D printing device of continuous fiber reinforced silicone rubber according to claim 1, wherein a feed tube (10) is provided at one side of the cartridge (1), the feed tube (10) being in communication with an outlet tube of the syringe (11).
4. 3D printing device of continuous fiber reinforced silicone rubber according to claim 1, characterized in that the injector (11) is fixed by a holder (15).
5. 3D printing device of continuous fiber reinforced silicone rubber according to claim 1, characterized in that the connection piece (4) is a sleeve, inside which the speed reducer (3) and the cartridge (1) are fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920983218.1U CN210211382U (en) | 2019-06-27 | 2019-06-27 | 3D printing apparatus of continuous fibers reinforcing silicon rubber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920983218.1U CN210211382U (en) | 2019-06-27 | 2019-06-27 | 3D printing apparatus of continuous fibers reinforcing silicon rubber |
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| CN210211382U true CN210211382U (en) | 2020-03-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112477133A (en) * | 2020-08-28 | 2021-03-12 | 中科院广州电子技术有限公司 | Mixed continuous fiber reinforced material 3D printing extrusion system |
| CN114131926A (en) * | 2021-11-29 | 2022-03-04 | 北京理工大学 | Continuous fiber reinforced composite material photocuring 3D printing device and method |
-
2019
- 2019-06-27 CN CN201920983218.1U patent/CN210211382U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112477133A (en) * | 2020-08-28 | 2021-03-12 | 中科院广州电子技术有限公司 | Mixed continuous fiber reinforced material 3D printing extrusion system |
| CN114131926A (en) * | 2021-11-29 | 2022-03-04 | 北京理工大学 | Continuous fiber reinforced composite material photocuring 3D printing device and method |
| CN114131926B (en) * | 2021-11-29 | 2022-08-02 | 北京理工大学 | Continuous fiber reinforced composite material photocuring 3D printing device and method |
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