CN111361151B

CN111361151B - Color mixing 3D printing nozzle assembly and color mixing method

Info

Publication number: CN111361151B
Application number: CN202010187962.8A
Authority: CN
Inventors: 郑功李
Original assignee: Shenzhen Youte Printing Supplies Co ltd; Chongqing Meike Wushuang Intelligent Technology Co ltd
Current assignee: Shenzhen Youte Printing Supplies Co ltd; Chongqing Meike Wushuang Intelligent Technology Co ltd
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2021-04-27
Anticipated expiration: 2040-03-17
Also published as: CN111361151A

Abstract

The invention relates to the technical field of 3D printer accessories, in particular to a color mixing 3D printing spray head assembly and a color mixing method, and the main technical scheme is that the color mixing 3D printing spray head assembly comprises an upper cover, a batching heating block and a discharging block which are sequentially arranged from top to bottom; at least two feeding channels are arranged on the upper cover, and a cutting part is arranged on the lower side of the upper cover and below the feeding channels; the ingredient heating block is provided with at least two material cavities which can be communicated with the feeding channel, and the ingredient heating block is rotationally connected with the upper cover; the discharging block is provided with a discharging cavity which can be communicated with the discharging cavity, the lower side of the discharging block is provided with a nozzle which is communicated with the discharging cavity, and the discharging block and the upper cover are relatively fixed; the upper cover is also provided with a material injection air passage which can be communicated with the material cavity. The invention has the following effects: multiple consumptive material will heat the melting and mix, annotates this moment and ventilate in the material air flue, under the effect of atmospheric pressure, the consumptive material will enter into the play material chamber, can finally output the product that has different colours.

Description

Color mixing 3D printing nozzle assembly and color mixing method

Technical Field

The invention relates to the technical field of 3D printer accessories, in particular to a color mixing 3D printing nozzle assembly and a color mixing method.

Background

3D printing, which is one of the rapid prototyping technologies, is also called additive manufacturing, which is a technology for constructing an object by using an adhesive material such as powdered metal or plastic and the like, and by printing layer by layer, based on a digital model file.

The 3D printing is usually implemented by a digital technology material printer, and is often used for manufacturing models in the fields of mold manufacturing, industrial design, and the like, and then gradually used for direct manufacturing of some products, and there are already parts printed by using this technology. The technology has applications in jewelry, footwear, industrial design, construction, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.

General printer is through as the consumptive material with the thermoplastic who is the line type, and the back in the consumptive material enters into the shower nozzle, and the consumptive material is extruded by the nozzle after the heating melting, and the consumptive material cooling of extruding is stereotyped to make the product build out layer by layer. In the existing 3D printing technology, consumables with single color can only be fed, so that products with single color can only be produced, and the limitation is large.

Disclosure of Invention

Aiming at the defects in the prior art, the first purpose of the invention is to provide a color mixing 3D printing nozzle assembly, which can perform color mixing as required so as to produce products with different colors.

The first object of the present invention is achieved by the following technical solutions: a color-mixing 3D printing spray head assembly comprises an upper cover, a material mixing and heating block and a material discharging block which are sequentially arranged from top to bottom; at least two feeding channels are arranged on the upper cover, and a cutting part is arranged on the lower side of the upper cover and below the feeding channels; the ingredient heating block is provided with at least two material cavities which can be communicated with the material inlet channel, and the ingredient heating block is rotatably connected with the upper cover; the discharging block is provided with a discharging cavity which can be communicated with the discharging cavity, the lower side of the discharging block is provided with a nozzle which is communicated with the discharging cavity, and the discharging block and the upper cover are relatively fixed; the upper cover is also provided with a material injection air passage which can be communicated with the material cavity.

Through adopting above-mentioned technical scheme, multiple consumptive material passes through the feed channel and gets into, the back is accomplished in the feeding, cut it through the cutter, required consumptive material volume will drop at the material intracavity this moment, the batching heating block will rotate this moment, make another material chamber rotate to the feed channel below, original consumptive material will heat the melting and mix simultaneously, ventilate in annotating the material air flue this moment, under the effect of atmospheric pressure, the consumptive material will get into to the play material chamber, finally extrude the consumptive material of different colours from the nozzle, can add the consumptive material of another kind of colour in the batching heating block this moment, can final output have the product of different colours.

The present invention in a preferred example may be further configured to: the upper cover the batching heating block the ejection of compact piece is the cylinder, the material chamber is followed the central axis circumference evenly distributed of batching heating block.

Through adopting above-mentioned technical scheme, when rotating, the upper cover keeps different with ejection of compact piece, and the rotation of batching heating piece will make the feed inlet in material chamber and discharge gate or conflict on the contact surface, perhaps will be connected with feed channel or ejection of compact chamber, can keep material intracavity portion to remain airtight throughout.

The present invention in a preferred example may be further configured to: five feeding channels are arranged and are respectively used for consumable materials with five colors of red, yellow, blue, black and white.

Through adopting above-mentioned technical scheme, through setting up five feed channels, can pass through trichromatic and black and white two-color, through the ratio back, can produce different various colours, and need not set up a large amount of colours, through the feeding volume in the every feed channel of control, just can realize the effect of producing multiple colour.

The present invention in a preferred example may be further configured to: the projections of the plurality of feeding channels in the vertical direction are positioned in the upper opening of the material cavity.

Through adopting above-mentioned technical scheme, with the upper shed increase back in material chamber, because the material chamber that the ejection of compact finishes still can have the waste heat, the consumptive material in the feed channel can not contact the higher inner wall of material chamber temperature when the feeding, avoids leading to its softening to glue even, is convenient for last feeding.

The present invention in a preferred example may be further configured to: just be located a plurality ofly on the upper cover downside the mounting groove has been seted up to the feed channel below, the length direction of mounting groove is along radial setting, and a plurality of the feed channel is also along radial setting, the cutting element includes two cutters, the threaded rod of rotation connection on one end inner wall of mounting groove of sliding the connection along the radial direction of perpendicular to and set up the cutter motor that upper cover and output shaft and threaded rod are connected, the screw thread opposite direction on the threaded rod both ends, and two cutters respectively with the both ends threaded connection of threaded rod.

Through adopting above-mentioned technical scheme, cutter motor work back will make the threaded rod rotate to make two cutters be close to each other or keep away from, and two cutters will cut the consumptive material simultaneously from both sides and can improve and cut the effect, two cutters can cut a plurality of consumptive materials simultaneously, and install the back on the upper cover with the cutting part, can make after the consumptive material cuts off can drop into to the material intracavity comparatively completely.

The present invention in a preferred example may be further configured to: if dry mixing plates are arranged on the inner wall in the material cavity, the mixing plates are obliquely arranged from one side of the upper cover to one side of the discharging block, the mixing plates are evenly arranged on two sides of the material cavity at intervals, the mixing plates on two sides are arranged in a staggered mode, and a mixing channel in a broken line shape is formed between the mixing plates on two sides.

Through adopting above-mentioned technical scheme, the consumptive material of multiple colour will drop in the flitch upside, will become the melting form gradually in the heating, just can pass through the compounding passageway gradually afterwards, during the motion, will form the colour mixture effect, drops to the material intracavity gradually.

The present invention in a preferred example may be further configured to: the discharging cavity is rotatably connected with a mixing rod, and the discharging block is provided with a mixing motor connected with the mixing rod through an output shaft.

Through adopting above-mentioned technical scheme, in ejection of compact chamber, the consumptive material will be continuously heated, and the compounding stick rotates the back simultaneously, will make the consumptive material can have better colour mixture effect.

The present invention in a preferred example may be further configured to: the upper cover is provided with and is used for ordering about batching heating piece pivoted driving piece, the driving piece rotates the axis of rotation of connecting on upper cover and ejection of compact piece respectively including setting up driving motor, both ends on the upper cover, the axis of rotation sets up the central axis department of upper cover, and the axis of rotation with batching heating piece fixed connection, the axis of rotation with driving motor's output shaft.

Through adopting above-mentioned technical scheme, driving motor work back will make the batching heating piece rotate through the axis of rotation, and the batching heating piece will rotate this moment, and the position in two material chambeies of replacement that can be better.

The present invention in a preferred example may be further configured to: the feeding device is characterized in that a feeding block is arranged on the upper cover, a plurality of driving grooves communicated with the feeding channel are formed in the feeding block, a feeding pipe in one-to-one correspondence with the driving grooves is installed on the upper side of the feeding block, each driving groove is internally and rotatably connected with a feeding gear and a tightening wheel, and an output shaft of the feeding block is connected with a feeding motor connected with the feeding gear.

Through adopting above-mentioned technical scheme, can the independent control every feeding motor control the input speed in every feed channel, through the rotational speed of control feeding gear for consumptive material can together cut off when the cutter cuts off in each feed channel.

The second purpose of the invention is to provide a color mixing method of the color mixing 3D printing nozzle assembly, which can perform color mixing as required, thereby producing products with different colors.

The second object of the present invention is achieved by the following technical solutions: a color mixing method of a color mixing 3D printing nozzle assembly comprises the following steps:

s1: feeding, wherein the feeding motors are independently controlled to drive according to color matching requirements, consumables of each color are independently fed after the feeding gears rotate, and the consumables enter the material cavity;

s2: cutting off the molten material, cutting off the consumable material through a cutter, simultaneously rotating the burdening heating block to enable the other material cavity to rotate to the lower part of the feeding channel, heating and melting the consumable material in the material cavity at the moment, and preliminarily mixing the molten raw material after the molten raw material passes through the mixing plates;

s3: the colour mixture ejection of compact annotates and annotates the air of annotating in the material air flue for the raw materials that are located the material intracavity enters into to ejection of compact intracavity, stirs through the compounding stick and carries out the colour mixture after, then through nozzle extrusion moulding.

By adopting the technical scheme, consumable materials are independently controlled to enter the feeding channel, almost any color can be formed after matching, gold is heated and melted after the consumable materials enter the feeding cavity and are cut off by the cutter, the other feeding cavity is subjected to next batching, the melting process and the batching are carried out simultaneously, and the production efficiency is improved; meanwhile, the consumables after color mixing can be extruded out through the nozzle through the discharging cavity, so that products with different colors are produced.

In summary, the invention includes at least one of the following beneficial technical effects:

1. through the plurality of feeding channels, after the materials are fed and heated through the material cavity, the consumables with different colors are melted and mixed, and after the materials are discharged through the material injecting air channel, the nozzle can output products with different colors;

2. during feeding, the phenomenon that the consumables are adhered to the inner wall of the material cavity at a higher contact temperature can be avoided, and stable and continuous feeding can be kept;

3. after the feeding, the consumptive material after the melting will carry out preliminary compounding through the compounding board, and the accessible compounding stick carries out the compounding, improves the colour mixture effect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic structural view of a feed block;

FIG. 4 is a bottom view of the upper cover for showing the cut-off;

FIG. 5 is a cross-sectional view of a batch heating block with a mix plate;

FIG. 6 is a cross-sectional view of a feedblock with a stir bar.

Reference numerals: 110. an upper cover; 111. a feed channel; 112. a material feeding block; 113. a drive slot; 114. a feed pipe; 115. a feed gear; 116. a tightening wheel; 117. a feeding motor; 120. a material mixing and heating block; 121. a material cavity; 122. a material injection air passage; 123. a connecting port; 124. a material mixing plate; 130. discharging a material block; 131. a nozzle; 132. a discharge cavity; 133. a mixing rod; 134. a mixing motor; 140. a drive member; 141. a drive motor; 142. a rotating shaft; 150. mounting grooves; 151. cutting off the parts; 152. a cutter; 153. a threaded rod; 154. a cutter motor; 155. a guide rod.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides a colour mixture 3D prints shower nozzle subassembly, refers to figure 1, includes upper cover 110, batching heating block 120 and ejection of compact piece 130 that top-down set gradually, and upper cover 110, batching heating block 120, ejection of compact piece 130 are the cylinder. The consumable enters the ingredient heating block 120 through the upper cover 110, is cut off and heated, is mixed and then is conveyed to the discharging block 130, and is extruded and molded through the nozzle 131.

Referring to fig. 2, the ingredient heating block 120 is rotatably connected to the upper cover 110, the discharging block 130 is relatively fixed to the upper cover 110, a driving member 140 for driving the ingredient heating block 120 to rotate is disposed on the upper cover 110, the driving member 140 includes a driving motor 141 mounted on the upper cover 110, and a rotating shaft 142 having two ends rotatably connected to the upper cover 110 and the discharging block 130, respectively, the rotating shaft 142 is disposed at a central axis of the upper cover 110, and the rotating shaft 142 is fixedly connected to the ingredient heating block 120. An output shaft of the driving motor 141 is connected to one end of the rotating shaft 142 through a gear train.

Referring to fig. 2 and 3, the upper cover 110 is provided with at least two feeding channels 111, and in order to output a plurality of colors, five feeding channels 111 are provided in the embodiment for the consumables of red, yellow, blue, black and white colors to enter. Five feeding channels 111 are radially arranged on the upper cover 110, meanwhile, a feeding block 112 is fixed on the upper cover 110 through bolts, a plurality of driving grooves 113 respectively communicated with the feeding channels 111 are formed in the feeding block 112, feeding pipes 114 in one-to-one correspondence to the driving grooves 113 are installed on the upper side of the feeding block 112, meanwhile, a feeding gear 115 and a butting wheel 116 are rotatably connected in each driving groove 113, a feeding motor 117 with an output shaft connected with the feeding gear 115 is installed on the feeding block 112, and after the feeding motor 117 rotates, the feeding gear 115 can feed consumables through friction force.

Referring to fig. 2 and 4, an installation groove 150 is formed on the lower side of the upper cover 110 and below the plurality of feed channels 111, and the installation groove 150 is radially disposed in the length direction. A cutting part 151 is arranged in the mounting groove 150, the cutting part 151 comprises two cutters 152 connected in a sliding manner along the radial direction perpendicular to the radial direction, a threaded rod 153 connected to one end of the mounting groove 150 in a rotating manner, and a cutter motor 154 arranged on the upper cover 110 and connected with the threaded rod 153 through an output shaft, the thread directions on two ends of the threaded rod 153 are opposite, and the two cutters 152 are respectively in threaded connection with two ends of the threaded rod 153. The threaded rod 153 will be connected to the same end of the two cutters 152 and the other end of the cutters 152 will be provided with a guide bar 155 to facilitate the sliding of the cutters 152.

Referring to fig. 2, the ingredient heating block 120 is provided with at least two material cavities 121 which can be communicated with the material inlet channel 111, and the material cavities 121 are circumferentially and uniformly distributed along the central axis of the ingredient heating block 120. An injecting air passage 122 is formed on the upper cover 110 and located at the opposite side of the feeding passage 111, and a connecting port 123 is formed on the injecting air passage 122 and can be used for connecting an air pipe. In this embodiment, there are two material cavities 121, and the two material cavities 121 are centrosymmetric about the rotation center. In order to avoid adhesion of the consumables to the inner wall of the material cavity 121 during feeding, the projections of the plurality of feeding channels 111 in the vertical direction are located in the upper opening of the material cavity 121, and the inner diameter of the material cavity 121 is gradually reduced from top to bottom.

Referring to fig. 5, in another embodiment, a plurality of dry mixing material plates 124 are disposed on an inner wall of the material chamber 121, the mixing plates 124 are disposed in an inclined manner from the upper cover 110 side to the discharging block 130 side, the mixing plates 124 are disposed at both sides of the material chamber 121 at uniform intervals, and the mixing plates 124 at both sides are disposed in a staggered manner, so that a zigzag type mixing channel is formed between the mixing plates 124 at both sides.

Referring to fig. 6, the discharging block 130 is provided with a discharging cavity 132, the discharging cavity 132 can be communicated with one of the material cavities 121 after the ingredient heating block 120 rotates, and the lower opening of the other material cavity 121 will be closed by the contact surface. The lower side of the discharging block 130 is provided with a nozzle 131 communicated with the discharging cavity 132, in another embodiment, the discharging cavity 132 is rotatably connected with a mixing rod 133, and the discharging block 130 is provided with a mixing motor 134 of which the output shaft is connected with the mixing rod 133. The consumables are discharged after being stirred by the mixing rod 133 after entering the discharging cavity 132.

It should be noted that the fittings used in the present invention, such as the feeding channel 111, the material chamber 121, and the material discharging chamber 132, will be coated with a non-stick layer, which can be a teflon coating or other coating material that can make the consumable material less prone to stick. Meanwhile, the two material cavities 121 on the ingredient heating block 120 can be set to be independently controlled in heating, so that the material cavities 121 can be heated after the material is discharged and communicated with the discharging cavity 132.

The implementation principle of the embodiment is as follows: five single colour consumptive materials, under the drive of feeding motor 117, according to the ratio feeding, cutter motor 154 work cuts the consumptive material afterwards, the consumptive material will drop on material mixing board 124, batching heating block 120 rotates the back this moment, another material chamber 121 moves to feed channel 111 below, simultaneously the consumptive material in the material chamber 121 will form the meltdown state after heating, be zigzag-shaped whereabouts along the compounding passageway afterwards, annotate the back of ventilating in the material air flue 122, will make the consumptive material enter into to ejection of compact chamber 132 in, material mixing rod 133 can stir the consumptive material, can pass through nozzle 131 extrusion moulding with the consumptive material simultaneously, and the consumptive material colour in another material chamber 121 is inequality again, can finally produce the product that has different colours.

Based on the color mixing 3D printing nozzle assembly, the invention also provides a color mixing method of the color mixing 3D printing nozzle assembly, which comprises the following steps:

s1: the feeding, according to the needs of matching colors, through the drive of each feeding motor 117 of independent control, make the consumptive material of every colour alone feed after feeding gear 115 rotates, the consumptive material enters into material chamber 121 in, through the rotational speed of controlling each feeding gear 115, the feeding length L of the steerable consumptive material of rotational speed of feeding gear 115, then the sectional area of wire rod is S, can obtain the feeding volume of each colour after multiplying, thereby carry out the colour ratio, the maximum volume that every material chamber 121 can hold need to be calculated simultaneously.

S2: cut off the melt, the consumptive material volume that reaches or the material chamber 121 can hold when needs reaches the back to the biggest volume, cutter motor 154 makes cutter 152 cut the consumptive material after the work, the consumptive material will drop on material mixing board 124, driving motor 141 rotates batching heating block 120 in the work simultaneously, driving motor 141 makes batching heating block 120 rotate 180 degrees at every turn, make another material chamber 121 rotate to feed channel 111 below, the consumptive material in the material chamber 121 heats the melting this moment, the raw materials after the melting carries out preliminary compounding after passing through between material mixing board 124, be broken line nature whereabouts.

S3: and (3) mixing color and discharging, wherein air is injected into the material injection air passage 122, so that the raw materials in the material cavity 121 enter the material discharge cavity 132, are mixed in color after being stirred by the material mixing rod 133, and are extruded and molded through the nozzle 131.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a colour mixture 3D prints shower nozzle subassembly which characterized in that: comprises an upper cover (110), a burdening heating block (120) and a discharging block (130) which are arranged from top to bottom in sequence;

at least two feeding channels (111) are arranged on the upper cover (110), and a cutting part (151) is arranged on the lower side of the upper cover (110) and below the feeding channels (111);

at least two material cavities (121) which can be communicated with the feeding channel (111) are formed in the ingredient heating block (120), and the ingredient heating block (120) is rotatably connected with the upper cover (110);

a discharging cavity (132) which can be communicated with the discharging cavity (121) is formed in the discharging block (130), a nozzle (131) communicated with the discharging cavity (132) is installed on the lower side of the discharging block (130), and the discharging block (130) and the upper cover (110) are relatively fixed;

the upper cover (110) is also provided with a material injection air passage (122) which can be communicated with the material cavity (121);

the upper cover (110), the ingredient heating block (120) and the discharging block (130) are all cylinders, and the material cavities (121) are uniformly distributed along the circumferential direction of the central axis of the ingredient heating block (120);

upper cover (110) downside is last and be located a plurality of mounting groove (150) have been seted up to feed channel (111) below, the length direction of mounting groove (150) is along radial setting, and a plurality of feed channel (111) is also along radial setting, cutting part (151) include two along perpendicular to radial direction slide cutter (152), rotate and connect threaded rod (153) on mounting groove (150) one end inner wall to and set up on upper cover (110) and cutter motor (154) that output shaft and threaded rod (153) are connected, threaded rod (153) opposite direction on both ends, and two cutter (152) respectively with the both ends threaded connection of threaded rod (153).

2. A color mixing 3D print head assembly as defined in claim 1, wherein: five feeding channels (111) are provided for consumable materials of five colors of red, yellow, blue, black and white respectively.

3. A color mixing 3D print head assembly as defined in claim 1, wherein: the projections of the plurality of feeding channels (111) in the vertical direction are positioned in the upper opening of the material cavity (121).

4. A color mixing 3D print head assembly as defined in claim 1, wherein: the material mixing device is characterized in that a plurality of dry mixing plates (124) are arranged on the inner wall in the material cavity (121), the dry mixing plates (124) are obliquely arranged from one side of the upper cover (110) to one side of the discharging block (130), the dry mixing plates (124) are uniformly arranged on two sides of the material cavity (121) at intervals, the dry mixing plates (124) on two sides are staggered, and a broken-line type material mixing channel is formed between the dry mixing plates (124) on two sides.

5. A color mixing 3D print head assembly as recited in claim 4, wherein: the discharging cavity (132) is connected with a mixing rod (133) in a rotating mode, and the discharging block (130) is provided with a mixing motor (134) of which the output shaft is connected with the mixing rod (133).

6. A color mixing 3D print head assembly as defined in claim 1, wherein: be provided with on upper cover (110) and be used for driving about batching heats piece (120) pivoted driving piece (140), driving piece (140) rotate rotation axis (142) of connecting on upper cover (110) and ejection of compact piece (130) respectively including setting up driving motor (141), both ends on upper cover (110), rotation axis (142) set up the central axis department of upper cover (110), and rotation axis (142) with batching heats piece (120) fixed connection, rotation axis (142) with the output shaft of driving motor (141).

7. A color mixing 3D print head assembly as recited in claim 6, wherein: be equipped with into material piece (112) on upper cover (110), it is a plurality of respectively with a plurality of drive groove (113) of feed channel (111) intercommunication to have seted up in material piece (112), material piece (112) upside is installed with a plurality of drive groove (113) one-to-one inlet pipe (114), every all rotate in drive groove (113) and be connected with feeding gear (115) and support tight wheel (116), be provided with on material piece (112) its output shaft with feeding motor (117) that feeding gear (115) are connected.

8. A method of blending colors of a color blending 3D print head assembly according to any one of claims 1 to 7, wherein: the method comprises the following steps:

s1: feeding, wherein the feeding motors (117) are controlled to drive individually according to color matching requirements, consumables of each color are fed individually after the feeding gears (115) rotate, and the consumables enter the material cavity (121);

s2: cutting off the molten material, cutting off the consumable material through a cutting knife (152), simultaneously rotating a material mixing heating block (120), so that the other material cavity (121) rotates to the position below the feeding channel (111), at the moment, the consumable material in the material cavity (121) is heated and melted, and the melted raw material is preliminarily mixed after passing through the mixing plates (124);

s3: and (3) mixing color and discharging, wherein air is injected into the material injection air passage (122), so that the raw materials in the material cavity (121) enter the material discharge cavity (132), are mixed color after being stirred by the material mixing rod (133), and are extruded and molded through the nozzle (131).