CN203449608U

CN203449608U - 3D (three dimensional) printer based on FDM (frequency-division multiplexing) technique

Info

Publication number: CN203449608U
Application number: CN201320392370.5U
Authority: CN
Inventors: 潘鑫龙; 何晓建; 于海波
Original assignee: GUILIN BANDAO ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: GUILIN BANDAO ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2013-07-03
Filing date: 2013-07-03
Publication date: 2014-02-26
Anticipated expiration: 2023-07-03

Abstract

The utility model discloses a 3D (three dimensional) printer based on an FDM (frequency-division multiplexing) technique. The 3D printer comprises a nozzle assembly and a printing worktable panel, wherein the nozzle assembly mainly comprises wire-feeding double rolls, a composite wire guide tube and a nozzle, the wire-feeding double rolls can compress fuse wires, and the composite wire guide tube consists of a metal tube and a nonmetal tube; a layer of adhesive jellies are coated on the printing worktable panel. According to the 3D printer based on the FDM technique, the problems that a wire-feeding wheel slips, an extrusion head assembly is blocked and a bottom layer of a printer object warps can be solved, the printing efficiency of the 3D printer can be substantially increased, and the quality of the printed object can be substantially improved.

Description

A kind of 3D printer based on FDM technology

Technical field

The utility model relates to RP technique field, is specifically related to a kind of 3D printer based on FDM technology.

Background technology

3D printer, i.e. a kind of machine of RP technique, it is a kind ofly to take mathematical model file as basis, uses powdery metal or the plastics etc. can jointing material, carrys out the technology of constructed object by the mode of successively printing.Past, its field such as mould manufacture, industrial design of being everlasting was used to modeling, existing just gradually for the direct manufacture of some products.

The 3D printing technique of main flow mainly comprises four kinds now: Stereolithography (SLA), three-dimensional powder bonding (3DP), selective laser sintering (SLS), fusion sediment rapid shaping (FDM).

Wherein, based on Stereolithography technology, although the 3D printer precision of three-dimensional powder adhesive technology and Selective Laser Sintering is higher, suitable material is also more extensive, often need larger power, technology more complicated, equipment cost, maintenance cost and material cost are all very high, so range of application mainly concentrates on high-end manufacture field at present.

Fusion sediment rapid shaping (FDM) is again fuse deposition, and it is by thread heat-fusible materials heating and melting, by the shower nozzle with a minute nozzle, is squeezed and is gushed out.After hot melt material fusing, from shower nozzle ejection, be deposited on the curing material of print job deck plate or front one deck, temperature starts to solidify after lower than solidification temperature, and the accumulation layer by layer by material forms final finished.

The advantage of FDM technology is to manufacture simple, and operation expense is cheap, but the defect of following three aspects of the 3D printer ubiquity based on FDM technology at present, affects the quality of printed product.

1. wire feed rolls stripped thread problem.

3D printer based on FDM technology, need to deliver to heater block by wire feeder through wire leading pipe by thread printed material (fuse) and make by nozzle, to be sprayed after its fusing.The spacing of common wire feeder pair roller is fixed, and through the use of certain hour, fixture easily produces loosening, and the spacing of pair roller changes, and has the defect of being inconvenient to change silk and producing stripped thread phenomenon.

2. extruder head assembly blockage problem.

3D printer based on FDM technology, common wire leading pipe is made by metal material, wire leading pipe one end (wire outlet end) connects heater block and nozzle, because metal is hot good conductor, the wire inlet end excess Temperature that causes wire leading pipe, cause fuse softening in wire leading pipe, result in blockage and cannot continue into silk, finally cause printing and interrupt.

3. print article bottom alice problem

The printed material that 3D printer based on FDM technology adopts is thermoplastic macromolecule material, there is the characteristic of significantly expanding with heat and contract with cold, when printing the larger object of floor space, the first floor of printing often will carry out high-density large-area laying, when solidify bottom surface, printable layer edge there will be the phenomenon warping, and causes printable layer height below inhomogeneous, and article quality is printed in impact on the one hand, the printing objects serious time that warps may depart from print platform, causes the utter failure of printing.

Utility model content

In view of the deficiencies in the prior art, the utility model provides a kind of 3D printer based on FDM technology.

Technical scheme is as follows:

A kind of 3D printer based on FDM technology, comprise nozzle component and print job deck plate, described nozzle component mainly forms by fuse being had to the wire feed pair roller of substrate hold-down function and the composite wire guide tube being comprised of metal tube and non-metallic pipe and nozzle, is coated with one deck viscosity jelly on described print job deck plate.

A roller in described wire feed pair roller is driven roll, and another roller is drive roll; The gap variable of driven roll and drive roll, utilizes the elastic force of elastic article, and the outer rim of driven roll can be tangent with the outer rim of drive roll.

Described composite wire guide tube is greater than with softening temperature the non-metallic pipe that the nonmetallic materials of 250 degrees Celsius make by two metal tubes and one and forms, and two metal tubes are fixedly connected on the two ends of non-metallic pipe, and each pipe is on same axis.

Described composite wire guide tube also can be greater than with softening temperature the non-metallic pipe that the nonmetallic materials of 250 degrees Celsius make by a metal tube and one and form, and metal tube is fixedly connected with on same axis with non-metallic pipe.

The beneficial effects of the utility model:

By adopting wire feed pair roller solution wire feed rolls stripped thread problem fuse to substrate hold-down function, the composite wire guide tube that employing is comprised of metal tube and non-metallic pipe solves extruder head assembly blockage problem, the mode that employing applies one deck viscosity jelly on print job deck plate solves printing article bottom alice problem, significantly improves the quality of printing effect He the article of printing of the 3D printer based on FDM technology.

Accompanying drawing explanation

Figure 1A, Figure 1B are a kind of overall structure schematic diagrames of the 3D printer based on FDM technology.

Fig. 2 is the wire feed roller pair structure schematic diagram in a kind of 3D printer based on FDM technology.

Fig. 3 is the composite wire guide tube structural representation in a kind of 3D printer based on FDM technology.

In accompanying drawing: 1. nozzle component; 2. nozzle; 3. print job deck plate; 101. driven roll; 102. drive roll; 103. spring; 104. fuse; 105,107. metal tubes; 106. polyfluortetraethylene pipe.

The specific embodiment

Below in conjunction with drawings and Examples, the utility model will be further described.

This routine print job deck plate adopts polyvinyl chloride to make, and viscosity jelly adopts acrylic acid epoxy resin.Acrylic acid epoxy resin has certain cohesive, can be effectively the printed material (fuse) of nozzle ejection be bonded on workbench, and its bonding force can be resisted and print the shrinkage stress of article bottom when cooling.Because print job deck plate and acrylic acid epoxy resin also exist bonding force, this bonding force is greater than the bonding force of printing article bottom and acrylic acid epoxy resin, has guaranteed when printing article are cooling indeformable.

A kind of 3D printer based on FDM technology, comprise nozzle component 1 and print job deck plate 3, described nozzle component is mainly by the wire

feed pair roller

101 and 102 fuse to substrate hold-down function, and composite wire guide tube, nozzle 2 forms, described print job deck plate adopts polyvinyl chloride to make, and is coated with one deck acrylic acid epoxy resin on it.

A roller in wire feed pair roller is driven roll 101, and another roller is drive roll 102; The spacing of driven roll and drive roll is adjustable, linking springs 103 one end on driven roll support, and the spring other end is connected on the fixture of nozzle component, and the outer rim of driven roll can be in contact with one another by the active force of spring and the outer rim of drive roll.

Composite wire guide tube consists of two metal tubes 105 and 107 and polyfluortetraethylene pipes 106, two metal tubes are threaded connection the two ends at polyfluortetraethylene pipe, the endoporus of two metal tubes and polyfluortetraethylene pipe is all on an axis, and endoporus aperture also all equates.

As another embodiment of the present utility model, composite wire guide tube consists of a metal tube 105 and a polyfluortetraethylene pipe 106, two pipes are threaded connection, also can connect by Tenon mode, the endoporus of two pipes is on an axis, endoporus aperture also equates, pipe end connection heater block and nozzle.

Other parts of this 3D printer all adopt prior art.

Claims

1. the 3D printer based on FDM technology, comprise nozzle component and print job deck plate, it is characterized in that: described nozzle component mainly forms by fuse being had to the wire feed pair roller of substrate hold-down function and the composite wire guide tube being comprised of metal tube and non-metallic pipe and nozzle, is coated with one deck viscosity jelly on described print job deck plate.

2. 3D printer according to claim 1, is characterized in that: a roller in wherein said wire feed pair roller is driven roll, and another roller is drive roll; The gap variable of driven roll and drive roll, utilizes the elastic force of elastic article, and the outer rim of driven roll can be tangent with the outer rim of drive roll.

3. 3D printer according to claim 2, it is characterized in that: wherein said composite wire guide tube is greater than with softening temperature the non-metallic pipe that the nonmetallic materials of 250 degrees Celsius make by two metal tubes and one and forms, two metal tubes are fixedly connected on the two ends of non-metallic pipe, and each pipe is on same axis.

4. 3D printer according to claim 2, it is characterized in that: wherein said composite wire guide tube is greater than with softening temperature the non-metallic pipe that the nonmetallic materials of 250 degrees Celsius make by a metal tube and one and forms, and metal tube is fixedly connected with on same axis with non-metallic pipe.

5. according to the 3D printer described in claim 3 or 4, it is characterized in that: metal tube is threaded with the connected mode employing of non-metallic pipe or Tenon mode is connected.

6. 3D printer according to claim 5, is characterized in that: wherein said non-metallic pipe adopts polytetrafluoroethylene (PTFE) to make.

7. 3D printer according to claim 6, is characterized in that: wherein said print job deck plate adopts polyvinyl chloride to make.

8. 3D printer according to claim 7, is characterized in that: wherein said viscosity jelly is acrylic acid epoxy resin.