CN104552948A - A 3D printing device - Google Patents

Abstract

The invention discloses a 3D printing device which comprises a shell, wherein the shell is divided into an upper layer and a lower layer, the upper layer of the shell is provided with a wire feeding mechanism, the lower layer of the shell is internally provided with a parallel moving mechanism, the moving printing end of the parallel mechanism is connected with an extrusion printing head, the wire feeding mechanism feeds a linear printing material to the extrusion printing head, and the lower layer of the shell is provided with a door. All FDM 3D printing consumables can be printed at high speed and smoothly. The PLA material can be used at high printing speed, and the printing speed limit of the PLA material when used on a parallel 3D printer is eliminated. Such as special materials like high-elasticity soft materials, PP materials, wood materials and the like, and materials which can be printed by the FDM 3D printer.

Description

A 3D printing device

technical field

The invention relates to a printing device, in particular to a 3D printing device.

Background technique

In the prior art, 3D printers have been widely used. In the existing 3D printers, the multi-directional movement of the printing head is realized by the vertical and horizontal beam structure. This kind of moving structure has many components and many driving motors. , the structure is complicated, and the printing speed is slow, which is not conducive to the promotion of 3D printers;

Extrusion heads of existing 3D printers are prone to material clogging and are one of the most important parts of the printer. Most of the existing extrusion heads can only use ABS materials, while for PLA materials, it is difficult to achieve smooth printing;

In order to pursue high-precision and high-speed printing, 3D printers inevitably choose the remote feeding method, and the traditional remote feeding structure can only meet the use of more conventional materials such as PLA and ABS, but it is convenient for special materials such as elastic and flexible materials. It seemed helpless.

Contents of the invention

The purpose of the present invention is to: aim at the above-mentioned defects of the prior art; to provide a 3D printing device with simple structure, fast printing speed, smooth material feeding, and not easy to block the extrusion head.

A 3D printing device is provided, comprising a casing, the casing is divided into upper and lower layers, the upper layer of the casing is provided with a wire feeding mechanism, the lower layer of the casing is provided with a parallel moving mechanism, and the mobile printing end of the parallel mechanism is connected with The extruding print head, the wire feeding mechanism sends the linear printing material to the extruding print head, and the lower layer of the housing is provided with an opening door.

In the above-mentioned 3D printing device, the parallel movement mechanism includes upper and lower bottom plates arranged in parallel, the bottom plate is triangular in shape, and the triangular corners of the two bottom plates are respectively connected by a slide bar group, and a slider is provided on the slide bar. Each slider is connected to a swing link group through the first universal joint seat, and the other ends of the three swing link sets are respectively connected to the mobile printing end through the second universal joint seat; Under the action of the first and second universal connection seats, the group drives the mobile printing end to complete a full range of movement;

The wire feeding mechanism includes a base, and a wire feeding through hole is opened in the base, and a wire feeding conduit is installed in the through hole, and a wire feeding conduit is opened on the body of the base to communicate with the inner hole of the conduit in the through hole. The opening groove, the base body on one side of the opening groove forms an elastic clip, the body of the elastic clip is equipped with a bearing, the outer circular surface of the bearing is against the inner hole of the conduit, and an inner hole is opened in the base The inner hole is equipped with a wire-feeding gear driven by a motor, and the wire-feeding gear and the bearing constitute a wire pinch mechanism.

In the above-mentioned 3D printing device, the extrusion printing head includes an aluminum alloy body, the upper port of the body has a through hole extending to the lower port, and a wire feeding Teflon tube is installed in the through hole. The outer circumference of the main body is provided with a plurality of integrally formed heat sinks at intervals from top to bottom, and an aluminum alloy extrusion head is provided at the front end of the aluminum alloy body, and a heating resistor and a temperature-sensitive resistor are arranged in the aluminum alloy extrusion head.

In the above-mentioned 3D printing device, the sliding rod group is composed of two parallel sliding rods, and the swing rod group is composed of two parallel pendulum rods; Each corner is provided with a support for connecting with the sliding strut.

In the above 3D printing device, a servo motor is provided on each of the three supports of the lower base plate, a transmission pin is respectively provided on the three supports of the upper base plate, and the servo motor and the The transmission pin is connected through a transmission belt, and the slider is connected with the transmission belt.

The present invention has the following advantages: the parallel moving mechanism in the present invention can make the printing head installed on the connecting plate realize all-round movement by controlling the moving speed of the three sliders and the associated universal joint device, forming a mobile The structure is simple and the moving speed is fast. The wire feeding mechanism of the present invention adopts the cooperation of bearings and gears to realize smooth feeding of all PDM materials. The printing extrusion head provided by the present invention adopts Teflon tubes to cooperate with heat sinks, and the resistance It is extremely small, and the output resistance is less than half of the extrusion head on the market or even less than one-fifth of the resistance of some extrusion heads. It can realize high-speed and smooth printing of all FDM 3D printing filaments. PLA materials can be used at high printing speeds, eliminating the printing speed limitation of PLA materials when used on parallel 3D printers. The extrusion head of the present invention can use many materials that cannot be used by existing 3D printers, such as special materials such as highly elastic soft materials, PP materials, and wood materials, and materials that can be printed by FDM 3D printers.

Description of drawings

Figure 1 is a three-dimensional view of the appearance and structure of the 3D printing device of the present invention;

Figure 2 is a perspective view of the parallel mechanism of the printing device shown in Figure 1 after removing the shell;

Fig. 3 is a front view of the parallel mechanism shown in Fig. 2;

Figure 4 is a perspective view of the parallel mechanism shown in Figure 3 after the servo drive motor is installed;

Figure 5 is a perspective view of the wire feeding mechanism in the 3D printing device shown in Figure 1;

Fig. 6 is a front view of the wire feeding mechanism in the 3D printing device shown in Fig. 5;

Fig. 7 is a front view of the extrusion print head structure in the 3D printing device shown in Fig. 1 .

Detailed ways

With reference to Fig. 1, shown in Fig. 2; Design a kind of 3D printing device, comprise casing 101, casing is divided into upper and lower two layers, is provided with wire feeding mechanism 107 in casing upper layer 102, is provided with in casing lower layer. Parallel mobile mechanism 105, the mobile printing end of parallel mobile mechanism 105 is connected with extruding print head 108, and the wire feeding mechanism 107 sends the linear printing material to the extruding print head 108, and the lower layer of the housing 101 is provided with Open the door 103.

With reference to Fig. 3, shown in Fig. 4: parallel movement mechanism 105 comprises upper and lower upper base plate 17 and lower base plate 1 that are arranged in parallel, upper base plate 17 and lower base plate 1 base plate are triangular, and the corner of triangle upper and lower base plate 17,1 They are respectively connected by slide bar groups, on which slide blocks 3 are arranged, and each slide block 3 is respectively connected with a swing bar group through the first universal joint seat 9, and the other ends of the three swing bar groups respectively pass through the second The universal connecting seat 6 is connected with a connecting plate 8; the three swing link groups drive the connecting plate 8 to complete the omnidirectional movement under the action of the first and second universal connecting seats 9, 8.

In the above-mentioned 3D printing device, the slide rod group is composed of two parallel sliding rods 4, and the swing rod group is composed of two parallel swing rods 10; Each corner of 1 and 1 is provided with a support 2 and 5 for connecting with the sliding strut.

In the above-mentioned 3D printing device, a servo motor 16 is respectively provided on the three supports 5 of the lower base plate 1, and a transmission pin 12 is respectively provided on the three supports 2 of the upper base plate, and the servo motor 16 The transmission pin 12 is connected with the transmission belt 13, and the slider 3 is connected with the transmission belt 13.

Referring to Fig. 5 and shown in Fig. 6; the wire feeding mechanism 107 includes a base 1071, and a wire feeding through hole is opened in the base 1071, and a wire feeding conduit 1072 is housed in the through hole, and a wire feeding guide 1072 is arranged on the body of the base. The open slot connected with the inner hole of the conduit in the through hole, the base body on one side of the open slot forms an elastic clip 1073, and a bearing 1074 is housed on the body of the elastic clip 1073, and the outer circular surface of the bearing 1074 is in contact with the delivery port. The inner holes of the wire guides are against each other, and an inner hole is opened in the base 1071, and a wire feeding gear 1076 driven by a motor is installed in the inner hole, and the wire feeding gear 1076 and the bearing 1074 constitute a printing wire pinch mechanism. The combination of bearings and gears can realize smooth feeding of all PDM materials.

Referring to Figure 7, the extruded print head 108 includes an aluminum alloy body 1081, the upper port of the body has a through hole 1082 extending to the lower port, and a wire feeding Teflon tube is housed in the through hole, not shown in the figure , on the outer circumference of the aluminum alloy body, a plurality of integrally formed heat sinks 1083 are arranged at intervals from top to bottom, and an aluminum alloy extrusion head 1084 is arranged on the front end 1086 of the aluminum alloy body, and the aluminum alloy extrusion head 1084 A heating resistor 1087 for heating the wire and a temperature-sensitive resistor 1085 for temperature control are provided in the middle.

Claims (5)

1. A 3D printing device, comprising a housing, the housing is divided into upper and lower layers, characterized in that: the upper layer of the housing is provided with a wire feeding mechanism, the lower layer of the housing is provided with a parallel moving mechanism, the parallel mechanism The moving printing end is connected with an extruding printing head, the wire feeding mechanism sends the linear printing material to the extruding printing head, and the lower layer of the housing is provided with an opening door. 2. The 3D printing device according to claim 1, characterized in that: the parallel moving mechanism includes bottom plates arranged in parallel up and down, the bottom plates are triangular in shape, and the triangular corners of the two bottom plates are connected by sliding bars respectively. connection, the sliders are provided with sliders, and each slider is connected to a swing bar group through the first universal joint seat, and the other ends of the three swing bar groups are respectively connected to the mobile printing machine through the second universal joint seat. The ends are connected; the three pendulum groups drive the mobile printing end to complete a full range of moving actions under the action of the first and second universal connection seats; The wire feeding mechanism includes a base, and a wire feeding through hole is opened in the base, and a wire feeding conduit is installed in the through hole, and a wire feeding conduit is opened on the body of the base to communicate with the inner hole of the conduit in the through hole. The opening groove, the base body on one side of the opening groove forms an elastic clip, the body of the elastic clip is equipped with a bearing, the outer circular surface of the bearing is against the inner hole of the conduit, and an inner hole is opened in the base The inner hole is equipped with a wire-feeding gear driven by a motor, and the wire-feeding gear and the bearing constitute a wire pinch mechanism. 3. The 3D printing device according to claim 2, characterized in that: the extrusion printing head comprises an aluminum alloy body, the upper port of the body has a through hole extending to the lower port, and the through hole is equipped with a wire feed Teflon tube, on the outer circumference of the aluminum alloy body, a plurality of integrally formed heat sinks are arranged at intervals from top to bottom, and an aluminum alloy extrusion head is arranged at the front end of the aluminum alloy body, the aluminum alloy extrusion head There are heating resistors and temperature sensitive resistors. 4. The 3D printing device according to claim 3, characterized in that: the sliding rod group is composed of two parallel sliding rods, and the swing rod group is composed of two parallel swing rods; The corners of the triangular upper and lower bottom plates are respectively provided with a support for connecting with the sliding struts. 5. The 3D printing device according to claim 4, characterized in that: a servo motor is provided on each of the three supports of the lower base plate, and a servo motor is respectively provided on the three supports of the upper base plate A transmission pin, the servo motor is connected with the transmission pin through a transmission belt, and the slider is connected with the transmission belt.