WO2020062708A1

WO2020062708A1 - Ink supply device and three-dimensional printing device

Info

Publication number: WO2020062708A1
Application number: PCT/CN2019/071112
Authority: WO
Inventors: 陈伟; 马达荣
Original assignee: 珠海赛纳三维科技有限公司
Priority date: 2018-09-26
Filing date: 2019-01-10
Publication date: 2020-04-02
Also published as: CN208827141U

Abstract

The present application provides an ink supply device and a three-dimensional printing device. The ink supply device comprises an ink storage chamber; an ink nozzle connected to the ink storage chamber; an elastic sealing assembly provided in the ink nozzle in a deformation state and arranged to cover an ink outlet of the ink nozzle; a base on which the ink nozzle can be detachably mounted; an ink needle provided in the base and tightly abutting against the elastic sealing assembly; and a first return elastic piece connected between the base and the ink needle in a deformation state; wherein an elastic force generated by deformation of the first return elastic piece is set to be larger than the sum of an elastic force generated by deformation of the elastic sealing assembly and a pressure on the elastic sealing assembly when the ink storage chamber is made of a liquid material.

Description

Ink supply device and three-dimensional printing device

This application claims priority from a Chinese patent application filed on September 26, 2018 with the Chinese Patent Office, application number 201821572161.8, and the invention name is "ink supply device and three-dimensional printing device", the entire contents of which are incorporated herein by reference .

Technical field

The utility model relates to the technical field of inkjet printing, in particular to an ink supply device and a three-dimensional printing device.

Background technique

With the development of society and the advancement of science and technology, printers have become common office appliances in life, which greatly facilitates people's lives. As one of printers, jet 3D printers supply ink to printing through ink delivery pipes. An inkjet printing device that realizes printing behind the head.

Among the existing jet 3D printers, normal printing is required when the printing material in the ink cartridge is in a liquid state. However, for example, wax printing materials will change from a liquid state to a solid state when stored offline or when stored at room temperature for a long time. The solid printing material can easily seal the ink outlet of the ink cartridge, so the ink cartridge cannot be inserted into the ink tank for normal printing. Specifically, the user needs to pre-process the ink cartridge, and change the material in the ink cartridge to a liquid state before installing the device, and then dock the ink cartridge with the ink tank and lock the ink cartridge; or put the ink cartridge in the ink tank first, at this time, the ink cartridge and The ink tank cannot be locked. When the solid material in the ink cartridge changes to a liquid state, the user locks the ink cartridge for normal printing.

In the above operations, the user needs to perform additional operations to complete the installation of the ink cartridge, and the user easily ignores the locking step when installing the ink cartridge, which causes printing to fail, and there is a tedious technical problem in the installation of the ink cartridge; In the solid state, ink cartridges and other components are easily damaged by collision during installation.

Application content

The purpose of the present invention is to provide an ink supply device and a three-dimensional printing device, so as to alleviate the complicated technical problem of ink cartridge installation in the prior art.

The utility model provides an ink supply device, including:

Ink storage chamber, set into a cavity structure;

An ink nozzle is connected to the ink storage chamber and communicates with the cavity structure;

An elastic sealing component is disposed in the ink nozzle in a deformed state and is configured to cover the ink outlet of the ink nozzle;

A base, the ink nozzle is detachably mounted on the base;

An ink needle is disposed in the base and closely contacts the elastic sealing component;

A first return elastic member connected between the base and the ink needle in a deformed state;

Wherein, the elastic force generated by the deformation of the first return elastic member is set to be greater than the elastic force generated by the deformation of the elastic seal component and the pressure on the elastic seal component when the ink storage chamber is a liquid material.

Further, the ink storage chamber includes:

A plurality of partitions, and a plurality of the partitions are connected in sequence to form a cavity structure;

Wherein, the partition plate connected to the ink nozzle is provided with at least one ink supply port, and the elastic seal assembly is disposed in a deformed state on the inner wall of the ink nozzle and the partition plate having the ink supply port. between.

Further, the elastic seal assembly includes:

The second return elastic member is set in a compressed state;

A seal configured to cover the ink outlet of the ink nozzle;

Wherein, the second return elastic member is provided between the partition plate having the ink supply port and the seal member.

Further, the elastic force generated by the deformation of the first return elastic member is set to be greater than the elastic force generated by the deformation of the second return elastic member and the pressure of the seal member when the ink storage chamber is a liquid material.

Further, one end of the second return elastic member abuts the partition plate having the ink supply port, and the other end is connected to the seal member.

Further, the inner surface of the ink nozzle is recessed to form a groove, and the sealing member is limited to cooperate with the groove;

Wherein, the moving stroke of the seal is set to be greater than the depth of the groove.

Further, the ink needle includes:

The ink needle body is arranged to match the ink outlet of the ink nozzle;

The ink guiding part is connected with an end of the ink needle body facing the seal, and closely contacts the seal;

A distance between a position where the ink guiding portion is in contact with the seal and a connection point between the ink guiding portion and the ink needle body is smaller than a depth of the groove.

Further, the base includes:

Base body

A guide groove is formed recessed along the surface of the base body, and the ink needle body is slidably connected with the guide groove.

Further, the ink needle further includes:

A first boss extending outwardly along the outer wall of the ink needle body;

The base further includes:

A second boss is formed by extending outward along a groove wall of the guide groove;

The first return elastic member is sleeved on the ink needle body, and is disposed between the first boss and the second boss.

The beneficial effects of the utility model are:

The utility model provides an ink supply device. The ink supply device includes an ink storage chamber provided in a cavity structure, an ink nozzle connected to the ink storage chamber, an elastic sealing component disposed in the ink nozzle in a deformed state, and is detachable. A base installed on the ink nozzle, an ink needle set in the base, and a first return elastic member connected between the base and the ink needle in a deformed state, wherein the ink nozzle and the ink storage cavity structure The communicating, elastic sealing component is arranged to cover the ink outlet of the ink nozzle, and the ink needle closely contacts the elastic sealing component. When the printing material in the ink storage chamber is in a solid state, the solid printing material can tightly block the ink nozzle, and the ink needle cannot enter the ink nozzle at this time. However, because the first Position elastic member, therefore, the base at this time can still be installed on the ink nozzle under the deformation of the first return elastic member, and the ink needle at this time is in close contact with the elastic sealing component and drives the first return elasticity After the printing material in the ink storage chamber is converted from solid to liquid, the elastic force generated by the deformation of the first return elastic member is set to be greater than the elastic force generated by the deformation of the elastic seal assembly. Therefore, the ink needle can drive the elastic seal assembly to move away from the ink outlet of the ink nozzle under the action of the first return elastic member, so that the liquid printing material in the ink storage chamber can pass along the ink nozzle along the ink nozzle. The inking needle flows out. With this structural design, the elastic force generated by the deformation of the first return elastic member provided between the base and the ink needle is greater than the elastic force and storage generated by the deformation of the elastic seal assembly. The pressure of the elastic sealing component when the room is a liquid material, there is no need to change the material in the ink storage chamber to a liquid state before installing, and then lock the base to the ink nozzle, or place the ink supply device in the ink tank first At this time, the base and the ink nozzle cannot be locked. When the solid material in the ink storage chamber is changed to a liquid state, the base and the ink nozzle are locked. The ink supply device is simple and convenient to operate, and it also avoids the user When the ink supply device is installed, ignoring the locking step causes printing failure; in addition, the first return elastic member can also play a buffering role in the installation process of the ink cartridge, so as to avoid the collision of each component during the installation process. Damaged.

The utility model provides a three-dimensional printing device having the ink supply device, and further includes:

Printing platform

A print head in communication with the ink needle;

Wherein, the print head distributes the printing material in the ink storage chamber to the printing platform to form a three-dimensional target object.

The beneficial effects of the utility model are:

The three-dimensional printing device has the same advantages as the ink supply device described above, and is not repeated here.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain the specific embodiments of the present utility model or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the following description The drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the drawings without paying creative labor.

1 is a schematic structural diagram of a printing material in an ink supply device according to an embodiment of the present invention when the printing material is in a solid state;

2 is a schematic structural diagram of a printing material in an ink supply device according to an embodiment of the present invention when the printing material is in a liquid state;

FIG. 3 is a schematic structural diagram of an elastic sealing component according to an embodiment of the present invention; FIG.

FIG. 4 is a schematic structural diagram of an ink needle connected to a first return elastic member according to an embodiment of the present invention; FIG.

FIG. 5 is a schematic structural diagram of a connection between a three-dimensional printing device and an ink supply device according to an embodiment of the present invention.

icon:

1- Ink storage room;

11-partition;

111- Ink supply port;

2-ink nozzle

21-notch

22-first connection portion;

3-elastic seal assembly;

31-second return elastic member;

32-seal;

4-base;

41-Base body;

42-guide groove;

43-second boss;

44-second connection;

5-ink needle

51-ink needle body;

52- Ink guide department;

53-first boss;

6-First return elastic member;

7-printing platform;

8-print head.

detailed description

The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without making creative work belong to the protection scope of the present invention.

In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms “inside” and “outer” is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying The description, rather than indicating or implying, the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

In the description of the present utility model, it should be noted that the terms "installation", "connected", and "connected" should be understood in a broad sense unless otherwise specified and limited. For example, it may be a fixed connection or a connection. Disassembly connection, or integral connection; it can be mechanical or electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood on a case-by-case basis.

As shown in FIG. 1, FIG. 3, and FIG. 4, this embodiment provides an ink supply device. The ink supply device includes an ink storage chamber 1 provided in a cavity structure, and an ink nozzle 2 connected to the ink storage chamber 1. , An elastic seal assembly 3 provided in the ink nozzle 2 in a deformed state, a base 4 detachably mounted on the ink nozzle 2, an ink needle 5 provided in the base 4, and a deformed state connected to the base 4 and the ink The first return elastic member 6 between the needles 5, wherein the ink nozzle 2 communicates with the cavity structure of the ink storage chamber 1, the elastic seal assembly 3 is provided to cover the ink outlet of the ink nozzle 2, and the ink needle 5 and the elasticity The seal assembly 3 closely abuts. When the printing material in the ink storage chamber 1 is in a solid state, the solid printing material can tightly block the ink nozzle 2, and the ink needle 5 cannot enter the ink nozzle 2 at this time. However, since the ink needle 5 and the base 4 A first return elastic member 6 is provided therebetween. Therefore, the base 4 can still be installed on the ink nozzle 2 under the deformation of the first return elastic member 6 at this time, and the ink needles 5 and The elastic seal assembly 3 is in close contact and drives the first return elastic member 6 to deform.

As shown in FIG. 2, FIG. 3 and FIG. 4, after the printing material in the ink storage chamber 1 is converted from a solid state to a liquid state, the elastic force generated by the deformation of the first return elastic member 6 is set to be greater than that generated by the deformation of the elastic seal assembly 3. The sum of the elastic force and the pressure on the elastic seal assembly 3 when the ink storage chamber 1 is a liquid material, therefore, the ink needle 5 can drive the elastic seal assembly 3 to eject ink away from the ink nozzle 2 under the action of the first return elastic member 6. The direction of the mouth is moved, so that the liquid printing material in the ink storage chamber 1 can flow out along the ink needle 5 through the ink nozzle 2. This structure design uses the first return position provided between the base 4 and the ink needle 5 The elastic force generated by the deformation of the elastic member 6 is greater than the elastic force generated by the deformation of the elastic seal assembly 3 and the pressure on the elastic seal assembly 3 when the ink storage chamber 1 is a liquid material. There is no need to change the material in the ink storage chamber 1 to a liquid state before installation. And then lock the base 4 to the ink nozzle 2 or place the ink supply device in the ink tank first. At this time, the base 4 and the ink nozzle 2 cannot be locked. When the ink storage chamber 1 turns into a solid material, After the liquid state, the base 4 and the ink nozzle 2 are locked, and the ink supply device is operated. It is simple and convenient. At the same time, it also prevents the user from ignoring the locking step when installing the ink supply device, which causes printing failure. In addition, the first return elastic member can also act as a buffer during the installation process of the ink cartridge. Avoid damage to the components due to collision during installation.

As shown in FIG. 1, FIG. 2, FIG. 3, and FIG. 4, wherein the base 4 and the ink nozzle 2 can be connected together in a detachable manner such as bolt fixing and thread fitting. In this embodiment, in order to facilitate the basic For the installation between the seat 4 and the ink nozzle 2, preferably, the outer wall of the ink nozzle 2 is provided with a first connection portion 22, the inner wall of the base 4 is provided with a second connection portion 44, and the first connection portion 22 is connected to the second One of the portions 44 is a convex structure and one is a recessed structure, and the first connection portion 22 is engaged with the second connection portion 44.

At the same time, the ink storage chamber 1 and the ink nozzle 2 can be connected together by means of bonding, snapping, screwing, etc. Specifically, in order to ensure the connection between the ink nozzle 2 and the ink storage chamber 1 firmly, in this embodiment Preferably, the ink nozzle 2 is integrally formed with the ink storage chamber 1.

As shown in FIG. 1, FIG. 2, and FIG. 3, specifically, the ink storage chamber 1 includes a plurality of partition plates 11, and the plurality of partition plates 11 are connected in sequence to form a cavity structure. The partition plate connected to the ink nozzle 2 11 is provided with at least one ink supply port 111, and the elastic seal assembly 3 is disposed between the inner wall of the ink nozzle 2 and the partition plate 11 having the ink supply port 111 in a deformed state. The printing material in the ink storage chamber 1 can pass the ink supply. The port 111 flows into the ink nozzle 2, wherein the ink supply port 111 on the partition plate 11 can be one, two, three, etc. In this embodiment, the ink nozzles 111 are provided on the ink nozzle so that the elastic seal assembly 3 can be deformed. 2 Between the inner wall and the partition 11 with the ink supply port 111, at the same time, to ensure that the ink storage chamber 1 communicates with the ink nozzle 2 and is easy to process. Preferably, the partition 11 connected to the ink nozzle 2 is provided with an ink supply port 111.

Among them, the partitions 11 may be connected by means of bonding, snap-fitting or welding. In this embodiment, in order to improve the tightness of the cavity structure enclosed by the partitions 11, it is preferred that the partitions 11 be integrated into one. Forming, that is, the ink storage chamber 1 is an integrated structure.

As shown in FIG. 1, FIG. 2 and FIG. 3, specifically, the elastic seal assembly 3 includes a second return elastic member 31 provided in a compressed state and a seal member 32 provided to cover the ink outlet of the ink nozzle 2. A second return elastic member 31 is provided between the partition plate 11 having the ink supply port 111 and the seal member 32. In this design structure, the seal member 32 is tightly pressed against the second return elastic member 31 in a compressed state. At the ink outlet of the ink nozzle 2, the tightness of the ink nozzle 2 when the printing material is not circulating is guaranteed.

Specifically, in order to realize that when the printing material in the ink storage chamber 1 is converted from a solid state to a liquid state, the first return elastic member 6 can drive the ink needle 5 to drive the seal 32 toward the ink supply port 111. In the embodiment, the elastic force generated by the deformation of the first return elastic member 6 is set to be greater than the elastic force generated by the deformation of the second return elastic member 31 and the pressure of the seal 32 when the ink storage chamber 1 is a liquid material.

In order to prevent the ink needle 5 from driving the seal 32 to move, the seal 32 is displaced in a direction perpendicular to the direction in which the seal 32 moves, or the seal 32 is separated from the second return elastic member 31. As a result, the seal member 32 cannot seal the ink outlet again. One end of the second return elastic member 31 abuts the partition plate 11 having the ink supply port 111, and the other end is connected to the seal member 32.

Wherein, the second return elastic member 31 and the seal member 32 may be connected together by means of bonding, snapping or welding. Specifically, in this embodiment, the second return elastic member 31 and the seal member 32 are not connected. The contact methods between them are specifically limited.

In this embodiment, in order to further ensure the stability of the sealing member 32 in the moving process, the partition plate 11 having the ink supply port 111 may be provided with a card slot, and an end of the second return elastic member 31 facing the ink supply port 111 and the card The slot snaps.

As shown in FIG. 1, FIG. 2, FIG. 3, and FIG. 4, the first return elastic member 6 and the second return elastic member 31 may be members having deformation characteristics such as a torsion spring. Specifically, for the convenience of the first For the assembly of the return elastic member 6 and the second return elastic member 31, in this embodiment, preferably, the first return elastic member 6 and the second return elastic member 31 are both cylindrical springs.

As shown in FIG. 1, FIG. 2 and FIG. 3, when the sealing member 32 is located at the ink outlet, when the sealing member 32 shifts its sealing position during the movement, that is, the sealing member 32 moves along with the sealing member 32 Displacement occurs in a direction perpendicular to the moving direction, and the printing material in the ink storage chamber 1 can still flow out from the gap between the seal 32 and the ink outlet. To prevent the above phenomenon, specifically, the inner surface of the ink nozzle 2 is depressed. The groove 21, the sealing member 32 and the groove 21 are limitedly matched. The side wall of the groove 21 and the side wall of the seal 32 can increase the contact area between the two and form a seal, thereby improving the sealing effect of the seal 32. The groove 21 can also limit the displacement of the seal 32 in a direction perpendicular to the moving direction of the seal 32.

Further, when the ink needle 5 drives the seal 32 to move in the direction of the ink supply port 111, in order to avoid the situation where the ink outlet cannot be opened, in this embodiment, the moving stroke of the seal 32 is set to be larger than the groove 21 depth.

Further, in order to ensure that the printing material in the ink storage chamber 1 can flow out along the ink supply port 111, even when the second return elastic member 31 is at the maximum compression amount, the seal member 32 and the second return elastic member 31 Also, the ink supply port 111 cannot be sealed.

As shown in FIG. 1, FIG. 3, and FIG. 4, specifically, the ink needle 5 includes an ink needle body 51 provided to match the ink outlet of the ink nozzle 2, and an end of the ink needle body 51 connected to the seal 32 toward the seal 32. Ink section 52, where the ink guiding section 52 closely contacts the sealing member 32. When the ink guiding section 52 lifts the sealing member 32 apart so that the sealing member 32 is separated from the ink outlet, the ink needle body 51 is arranged to be in contact with the ink nozzle 2 Matching the ink outlets can form a seal between the ink needle body 51 and the ink outlets, preventing the printing material from leaking.

As shown in FIG. 4, the ink guiding portion 52 may be connected to the ink needle body 51 by means of bonding, snapping, etc. Further, in order to improve the sealing effect of the ink needle 5, the ink guiding portion 52 faces the seal along the ink needle body 51. One end of the piece 32 is recessed in a circumferential direction.

Among them, in order to prevent leakage from occurring before the ink needle body 51 is sealed with the ink outlet, in this embodiment, the ink guide portion 52 is in contact with the seal 32 and the ink guide portion 52 is connected to the ink needle body 51 The distance between the points is smaller than the depth of the groove 21.

As shown in FIG. 4, in order to realize that the ink needle 5 can be displaced with the deformation of the first return elastic member 6, so that the base 4 can communicate with the ink nozzle even when the printing material in the ink storage chamber 1 is solid. 2 Installation. Specifically, the base 4 includes a base body 41 and a guide groove 42 formed by recessing along the surface of the base body 41. One end of the first return elastic member 6 may be fixed to the base by means of bonding or welding. The other end of the main body 41 may be fixed to the ink needle body 51 by means of bonding or welding. In order to facilitate the installation and removal of the first return elastic member 6, specifically, the first extension elastic member 6 extends outward along the outer wall of the ink needle body 51 to form a first A protrusion 53 extends outward along the groove wall of the guide groove 42 to form a second protrusion 43. A first return elastic member is sleeved on the ink needle body 51 and is disposed on the first protrusion 53 and the second protrusion. Between the stands 43, the ink needle body 51 and the guide groove 42 are slidably connected.

In this embodiment, a three-dimensional printing device is also provided. The three-dimensional printing device includes the ink supply device according to any one of the foregoing embodiments, and further includes a printing platform 7 and a printing head 8 connected to the ink needle 5. The printing head 8 Distribute the printing material in the ink storage chamber 1 to the printing platform 7 to form a three-dimensional target object.

The three-dimensional printing device has the same advantages as the ink supply device described in any one of the above embodiments, and details are not described herein again.

As shown in FIG. 5, in this embodiment, in order to improve the functionality of the three-dimensional printing device, the three-dimensional printing device may be connected with a plurality of ink supply devices, wherein the ink storage chamber 1 of each ink supply device is loaded in the ink storage chamber 1. The printing materials may be different from each other. The printing materials may specifically be a solid material and a supporting material, and the solid material may also include a plurality of printing materials with different properties.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present utility model, rather than limiting it; although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand : It can still modify the technical solutions described in the foregoing embodiments, or replace some or all of the technical features equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions separate from the embodiments of the present invention The scope of the technical solution.

Claims

The ink supply device according to claim 3, wherein one end of the second return elastic member (31) abuts the partition plate (11) having the ink supply port (111), and the other end Connected to the seal (32).
The ink supply device according to claim 3, wherein an inner surface of the ink nozzle (2) is recessed to form a groove (21), and the seal (32) and the groove (21) are limited in position Cooperate

Wherein, the moving stroke of the seal (32) is set to be greater than the depth of the groove (21).
The ink supply device according to claim 6, wherein the ink needle (5) comprises:

The ink needle body (51) is arranged to match the ink outlet of the ink nozzle (2);

The ink guiding portion (52) is connected to an end of the ink needle body (51) facing the seal (32), and closely contacts the seal (32);

The distance between the position where the ink guiding portion (52) and the seal (32) abut and the connection between the ink guiding portion (52) and the ink needle body (51) are smaller than the groove ( 21).
The ink supply device according to claim 7, wherein the base (4) comprises:

Base body (41);

A guide groove (42) is recessed along the surface of the base body (41), and the ink needle body (51) is slidably connected to the guide groove (42).
The ink supply device according to claim 8, wherein the ink needle (5) further comprises:

A first boss (53) extending outwardly along an outer wall of the ink needle body (51);

The base (4) further includes:

A second boss (43) extending outward along a groove wall of the guide groove (42);

The first return elastic member (6) is sleeved on the ink needle body (51), and is disposed between the first boss (53) and the second boss (43).
A three-dimensional printing device, comprising the ink supply device according to any one of claims 1-9, further comprising:

Printing platform (7);

A print head (8) in communication with the ink needle (5);

The printing head (8) distributes the printing material in the ink storage chamber (1) to the printing platform (7) to form a three-dimensional target object.