CN211542396U - Lower powder feeding device suitable for adhesive injection molding - Google Patents
Lower powder feeding device suitable for adhesive injection molding Download PDFInfo
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- CN211542396U CN211542396U CN201922066335.4U CN201922066335U CN211542396U CN 211542396 U CN211542396 U CN 211542396U CN 201922066335 U CN201922066335 U CN 201922066335U CN 211542396 U CN211542396 U CN 211542396U
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Abstract
The utility model discloses a lower powder feeding device suitable for adhesive injection molding, which comprises two powder cylinders and a molding cylinder, wherein the two powder cylinders are distributed at two sides of the molding cylinder, and the powder outlet of the powder cylinder is higher than the powder inlet of the molding cylinder; the powder spreading vehicle is arranged between the two powder cylinders; the bottom parts of the two powder cylinders are respectively provided with a powder cylinder bottom plate capable of sliding along the powder cylinder body, and the bottom part of the forming cylinder is provided with a forming cylinder bottom plate capable of sliding along the forming cylinder body; one end of each screw rod is detachably connected with the two powder cylinder bottom plates and the forming cylinder bottom plate, and the other end of each screw rod is connected with the three power motors. The utility model discloses a powder export of lower powder feeding device is higher than the powder entry of shaping jar, can prevent effectively that impurity in the shaping jar from being scraped the powder jar by the powder paving vehicle in, polluting the powder jar. Meanwhile, impurities in the forming cylinder are scraped to the side wall of the powder cylinder, so that friction between a scraper of the powder spreading vehicle and the impurities is reduced, and the probability of friction damage of the scraper is reduced. The utility model relates to a 3D prints technical field.
Description
Technical Field
The utility model relates to a 3D prints technical field, in particular to lower powder feeding device suitable for adhesive injection moulding.
Background
Bj (binder shooting), also known as adhesive injection molding technology. BJ is a manufacturing technique in which one or more materials are continuously bonded as entities, and then a sample is obtained by a post-heat treatment. 3D printing (additive manufacturing), also known as rapid prototyping, where SLM (selective laser melting) and SLS (selective laser sintering) are one manufacturing technique for building three-dimensional objects by successively fusing more than one thin layer of material.
BJ. The SLM and SLS equipment are required to realize the powder spreading function, and the feeding modes of the three equipment are similar or even identical. The three materials are supplied by the powder supply device, and then the powder is spread on the printing platform by the horizontal powder spreading device. Powder bed type additive manufacturing is the most common one of the three, and the efficiency of the powder feeding device in the powder feeding mode influences the efficiency of the whole process, and meanwhile, the powder feeding mode and the powder feeding device have characteristics. The existing powder feeding device comprises an upper gravity powder feeding device and a lower single-cylinder powder feeding device, and is mainly suitable for SLM (Selective laser melting) and SLS (selective laser melting) equipment, but no BJ (bulk material handling) special powder feeding equipment exists at present.
The powder feeding device on gravity has the following problems: when the air pressure of a closed working cavity of the machine is greater than one atmosphere, the powder falling amount is reduced, and when the air pressure of a working area is less than one atmosphere, automatic powder leakage is caused, so that the powder laying is inaccurate, and unnecessary waste is possibly caused. Secondly, powder is seriously blocked, and the powder is blocked in the gap due to the small powder falling gap of the gravity powder falling mechanism, and the powder is blocked after a certain amount of powder is accumulated, so that the processing efficiency is greatly reduced, and the mass production is not facilitated.
The traditional single-cylinder lower powder feeding device has the following problems: firstly, the powder cylinder and the forming cylinder are positioned on the same working plane, the powder spreading vehicle needs to pass through the forming cylinder and the powder cylinder, impurities in the forming cylinder are easily scraped and conveyed to the powder cylinder, powder in the powder cylinder is polluted, and the scraper can be damaged. Secondly, when a large-volume sample is printed, powder in a single powder cylinder is easy to be insufficient, and the labor cost of automatic equipment is increased if the powder is added frequently. And thirdly, the powder paving vehicle only paves powder once back and forth, which can lead to long printing time and low efficiency.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's defect and not enough, provide a lower powder feeding device suitable for adhesive injection moulding, the device can prevent the impurity contamination powder jar of shaping jar, reduces the scraper and damages.
The purpose of the utility model can be realized by the following technical scheme: a lower powder feeding device suitable for adhesive injection molding comprises two powder cylinders and a molding cylinder, wherein the two powder cylinders are distributed on two sides of the molding cylinder, and a powder outlet of each powder cylinder is higher than a powder inlet of the molding cylinder; the powder spreading vehicle is arranged between the two powder cylinders; the bottom parts of the two powder cylinders are respectively provided with a powder cylinder bottom plate capable of sliding along the powder cylinder, and the bottom part of the forming cylinder is provided with a forming cylinder bottom plate capable of sliding along the forming cylinder; one end of each screw rod is detachably connected with the two powder cylinder bottom plates and the forming cylinder bottom plate, and the other end of each screw rod is connected with the three power motors.
As a preferred technical scheme, the powder cylinder comprises a cylinder body and a powder guide pipe, the powder guide pipe is arranged at the top of the cylinder body, and a powder outlet is formed in the powder guide pipe. The powder guide pipe is detachably connected to the top of the cylinder body.
Preferably, the maximum width of the powder guide pipe and the width of the cylinder body are consistent with the width of the forming cylinder. The equal volume of powder transfer can be guaranteed.
As the preferred technical scheme, the powder cylinder bottom plate and the forming cylinder bottom plate are both provided with sealing rings. The sealing ring can improve the sealing performance of the powder cylinder and the forming cylinder and prevent powder leakage.
As a preferable technical scheme, the power motor is a stepping motor or a servo motor.
As a preferable technical scheme, the bottom of the powder paving vehicle is provided with a scraper and is driven by a power device.
Preferably, the minimum movement amount of the screw rod is less than or equal to 10 um.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
1. the utility model discloses a powder export of lower powder feeding device is higher than the powder entry of shaping jar, can prevent effectively that impurity in the shaping jar from being scraped the powder jar by the powder paving vehicle in, polluting the powder jar. Meanwhile, impurities in the forming cylinder are scraped to the side wall of the powder cylinder, so that friction between a scraper of the powder spreading vehicle and the impurities is reduced, and the probability of friction damage of the scraper is reduced.
2. The utility model discloses a powder is sent to the double-cylinder, send the powder for the single cylinder, can guarantee that the powder volume is stable, and machining efficiency is high, and the print time is short.
3. The utility model discloses a two powder jars have relative independence, also can only move a powder jar in the special case and send the powder, and the suitability is wider, not only can be applicable to SLM, SLS equipment, also can be applicable to the BJ equipment.
Drawings
Fig. 1 is a schematic structural view of a lower powder feeding device in an embodiment of the present invention.
Wherein: 1: first powder jar, 11: first cylinder, 12: first powder guide pipe, 13: first powder cylinder bottom plate, 14: first lead screw, 15: first motor, 2: second powder jar, 21: second cylinder, 22: second guide tube, 23: second powder cylinder bottom plate, 24: second screw, 25: second motor, 3: molding cylinder, 31: forming cylinder bottom plate, 32: molding cylinder lead screw, 33: molding cylinder motor, 4: powder, 5: powder paving vehicle, 6: ink jet vehicle.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings, but the present invention is not limited thereto.
As shown in fig. 1, a lower powder feeding device suitable for adhesive injection molding includes a first powder cylinder, a second powder cylinder, and a molding cylinder. The first powder cylinder and the second powder cylinder are distributed on two sides of the forming cylinder, and the forming cylinder is located in the middle of the two powder cylinders.
The first powder cylinder comprises a first cylinder body, a first powder guide pipe, a first powder cylinder bottom plate, a first screw rod and a first motor. The top of the first cylinder body is provided with a first detachable powder guide pipe which is a section of plastic bent pipe, and the minimum section of the first detachable powder guide pipe is provided with a powder outlet. The powder outlet is higher than the powder inlet of the forming cylinder, so that impurities in the forming cylinder can be effectively prevented from being scraped into the powder cylinder by the powder spreading vehicle to pollute the powder cylinder. The first cylinder body and the first powder guide pipe are used for containing printing powder. The bottom of the first cylinder body is provided with a first powder cylinder bottom plate, and the first powder cylinder bottom plate can slide in the first cylinder body to push powder to move along the direction of the powder outlet. In order to ensure the sealing property in the first powder cylinder, a sealing ring can be arranged on the bottom plate of the first powder cylinder to prevent powder leakage. One end of the first screw rod is detachably connected with the first powder cylinder bottom plate, and the other end of the first screw rod is connected with the first motor. The first screw rod can push the first powder cylinder bottom plate to move linearly upwards under the driving of the first motor. The first motor is a stepping motor or a servo motor, the minimum movement amount of the first screw rod is less than or equal to 10um, and the powder feeding amount can be quantitatively and accurately controlled.
The second powder cylinder comprises a second cylinder body, a second powder guide pipe, a second powder cylinder bottom plate, a second screw rod and a second motor. The structure of the second powder cylinder is consistent with that of the first powder cylinder and is symmetrically arranged on the other side of the forming cylinder.
The forming cylinder comprises a forming cylinder bottom plate, a forming cylinder screw rod and a forming cylinder motor. A powder spreading vehicle is arranged between the two powder cylinders, a scraper is arranged at the bottom of the powder spreading vehicle, and the powder spreading vehicle can move along the working platform under the driving of an external power device, so that powder in the powder cylinders can be scraped into the forming cylinder for forming. One end of the forming cylinder screw rod is detachably connected with the forming cylinder bottom plate, and the other end of the forming cylinder screw rod is connected with a forming cylinder motor. The molding cylinder motor is a stepping motor or a servo motor. Under the drive of a forming cylinder motor, a forming cylinder screw rod drives a forming cylinder bottom plate to move linearly downwards. An ink-jet vehicle is arranged right above the forming cylinder and is used for jetting ink in the powder forming process.
The utility model relates to a powder device is sent down to theory of operation suitable for adhesive injection molding as follows:
powder is filled into the two powder cylinders, and a powder paving vehicle is driven to stop at a powder outlet of the first powder cylinder; a first motor for driving the first powder cylinder drives a first screw rod to push a first powder cylinder bottom plate to move upwards, and powder falls on a powder paving vehicle; driving a forming cylinder motor to enable a forming cylinder screw rod to pull a forming cylinder bottom plate to move downwards for a powder laying thickness, scraping powder into the forming cylinder by a powder laying vehicle, and stopping at a powder outlet of a second powder cylinder; a second motor for driving a second powder cylinder to enable a second screw rod to push a bottom plate of the second powder cylinder to move upwards so as to place powder on a powder paving vehicle; and driving a forming cylinder motor to enable a forming cylinder screw rod to pull a forming cylinder bottom plate to move downwards for a powder laying thickness, and scraping powder into the forming cylinder by a powder laying vehicle and stopping at a powder outlet of the first powder cylinder.
The process is a process of completing single powder laying operation by using two powder cylinders, and the double-cylinder powder feeding can improve the processing efficiency and reduce the printing time. The utility model discloses a lower powder feeding device's two powder jars have relative independence, under some circumstances, also can only move one of them powder jar and send the powder operation. Taking the operation of the first powder cylinder as an example, the operation steps are as follows:
powder is filled into the first powder cylinder, and a powder paving vehicle is driven to stop at a powder outlet of the first powder cylinder; a first motor for driving the first powder cylinder drives a first screw rod to push a first powder cylinder bottom plate to move upwards, and powder falls on a powder paving vehicle; and driving a forming cylinder motor to enable a forming cylinder screw rod to pull a forming cylinder bottom plate to move downwards, scraping powder into the forming cylinder by a powder paving vehicle, and automatically returning to a powder outlet of the first powder cylinder after the powder passes through the forming cylinder.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (8)
1. A lower powder feeding device suitable for adhesive injection molding is characterized by comprising two powder cylinders and a molding cylinder, wherein the two powder cylinders are distributed on two sides of the molding cylinder, and a powder outlet of each powder cylinder is higher than a powder inlet of the molding cylinder; the powder spreading vehicle is arranged between the two powder cylinders; the bottom parts of the two powder cylinders are respectively provided with a powder cylinder bottom plate capable of sliding along the powder cylinder, and the bottom part of the forming cylinder is provided with a forming cylinder bottom plate capable of sliding along the forming cylinder; one end of each screw rod is detachably connected with the two powder cylinder bottom plates and the forming cylinder bottom plate, and the other end of each screw rod is connected with the three power motors.
2. The bottom powder feeding device for adhesive injection molding according to claim 1, wherein the powder cylinder comprises a cylinder body and a powder guiding pipe, the powder guiding pipe is arranged on the top of the cylinder body, and the powder guiding pipe is provided with a powder outlet.
3. The lower powder feeding device for injection molding of adhesives as claimed in claim 2, wherein the powder guide tube is detachably attached to the top of the cylinder.
4. The lower powder feeding device for adhesive injection molding according to claim 2 or 3, wherein the maximum width of the powder guide pipe and the width of the cylinder body are the same as the width of the molding cylinder.
5. The bottom powder feeding device for adhesive injection molding according to claim 1, wherein the bottom plate of the powder cylinder and the bottom plate of the molding cylinder are provided with sealing rings.
6. The bottom powder feeding device suitable for adhesive injection molding according to claim 1, wherein the power motor is a stepping motor or a servo motor.
7. The lower powder feeding device for adhesive injection molding according to claim 1, wherein the bottom of the powder spreading vehicle is provided with a scraper and is driven by a power device.
8. The bottom feed apparatus for adhesive injection molding according to claim 1, wherein the minimum movement of the screw is 10 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922066335.4U CN211542396U (en) | 2019-11-26 | 2019-11-26 | Lower powder feeding device suitable for adhesive injection molding |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922066335.4U CN211542396U (en) | 2019-11-26 | 2019-11-26 | Lower powder feeding device suitable for adhesive injection molding |
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| CN211542396U true CN211542396U (en) | 2020-09-22 |
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| CN201922066335.4U Active CN211542396U (en) | 2019-11-26 | 2019-11-26 | Lower powder feeding device suitable for adhesive injection molding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110802839A (en) * | 2019-11-26 | 2020-02-18 | 华南理工大学 | Lower powder feeding device and method suitable for adhesive injection molding |
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2019
- 2019-11-26 CN CN201922066335.4U patent/CN211542396U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110802839A (en) * | 2019-11-26 | 2020-02-18 | 华南理工大学 | Lower powder feeding device and method suitable for adhesive injection molding |
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