CN110884028A - Nozzle assembly of dental blasting machine and machining method thereof - Google Patents
Nozzle assembly of dental blasting machine and machining method thereof Download PDFInfo
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- CN110884028A CN110884028A CN201811055688.8A CN201811055688A CN110884028A CN 110884028 A CN110884028 A CN 110884028A CN 201811055688 A CN201811055688 A CN 201811055688A CN 110884028 A CN110884028 A CN 110884028A
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- 238000005422 blasting Methods 0.000 title claims abstract description 17
- 238000003754 machining Methods 0.000 title claims description 19
- 238000000034 method Methods 0.000 title claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 308
- 239000004033 plastic Substances 0.000 claims abstract description 12
- 229920003023 plastic Polymers 0.000 claims abstract description 12
- 238000003672 processing method Methods 0.000 claims abstract description 5
- 238000001746 injection moulding Methods 0.000 claims description 45
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- 210000003437 trachea Anatomy 0.000 claims description 6
- 238000012545 processing Methods 0.000 abstract description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14467—Joining articles or parts of a single article
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C17/00—Devices for cleaning, polishing, rinsing or drying teeth, teeth cavities or prostheses; Saliva removers; Dental appliances for receiving spittle
- A61C17/02—Rinsing or air-blowing devices, e.g. using fluid jets or comprising liquid medication
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C3/00—Dental tools or instruments
- A61C3/02—Tooth drilling or cutting instruments; Instruments acting like a sandblast machine
- A61C3/025—Instruments acting like a sandblast machine, e.g. for cleaning, polishing or cutting teeth
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Engineering & Computer Science (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention aims to provide a nozzle assembly of a dental blasting machine with reduced processing cost and a processing method thereof. A nozzle component of a dental blasting machine comprises a nozzle shell, a nozzle framework, a gas pipeline, a water pipeline and a nozzle pipe, wherein the nozzle framework comprises a nozzle and a framework, the framework is provided with a joint part used for being connected with a machine body component, the gas pipeline and the water pipeline are positioned in the framework, the nozzle pipe is arranged in the nozzle, and the nozzle shell is injected outside the nozzle framework; the nozzle framework and the nozzle shell are respectively plastic parts.
Description
Technical Field
The invention relates to the field of dental medical instruments, in particular to a nozzle assembly of a dental sandblasting machine and a processing method thereof.
Background
Tooth cleaning is a good tooth health care means and is also the primary measure for treating periodontal disease. The regular tooth cleaning can not only thoroughly remove dental plaque and calculus on teeth, keep the periodontal tissue healthy and prevent and treat periodontal diseases. In addition, when teeth are cleaned, small and inconspicuous odontopathy such as hidden decayed teeth can be easily found, and the aim of early detection and early treatment can be achieved.
The sand blasting tooth cleaning is to clean tea dirt, smoke dirt and substance soft dirt attached to teeth by adding high-pressure water to pearl salt, and the teeth cleaned by sand blasting are very smooth and are not easy to deposit dental calculus again, so that the tooth cleaning and the sand blasting are generally recommended to be carried out in a combined manner.
The dental sand blasting machine carries out tooth treatment by a jet of abrasive powder mixed with air and water, and comprises a machine body assembly and a nozzle assembly, wherein the machine body assembly is connected with the nozzle assembly in a plug-in manner;
the machine body assembly includes an integrated powder container for storing a predetermined amount of powder, an air supply line for pressurizing air and connected to the inside of the powder container, a transfer line for transferring the powder mixed with air, a water supply line connected to a water source, and a machine body joint connected to a nozzle; one end of the conveying line is connected into the powder container, and the other end of the conveying line is exposed out of the machine body joint; a water outlet of a water supply line is arranged at the machine body joint, two sealing rings are axially arranged at the machine body joint, and the water outlet is arranged between the two sealing rings;
the nozzle assembly comprises a nozzle housing, a nozzle, a water output line and an air powder output line, the nozzle is provided with a water channel and an air powder channel, and the air powder channel is arranged in the water channel; the nozzle is provided with a water inlet of a water output line and a gas inlet of an air powder output line, and the nozzle shell is hermetically connected with the machine body joint; when the head assembly and the nozzle assembly are connected, the conveying line is connected with the air powder output line.
When the sand blasting machine is used, the machine body assembly and the nozzle assembly are inserted in place, and a water containing gap is formed in the area in front of the two sealing rings; pressurized air and water are input, air powder is sprayed out of the air powder channel through the conveying line and the air powder output line, and water is sprayed out of the water channel through the water supply line, the water containing gap and the water output line.
The prior sand blasting machine has the following defects: 1. the machine body joint and the part connected with the machine body joint in the nozzle shell are made of metal materials, the manufacturing cost is high, and after the machine body joint and the nozzle shell are pulled out and inserted for many times, abrasion occurs between the metals, so that the connection between the machine body assembly and the nozzle assembly is loosened. 2. After the transmission line and the air powder output line are pulled out and inserted for many times, the connection tightness is reduced, and sand leakage and sand blockage are easy to occur. 3. The water channel is annular, and rivers are the annular scattering, and the jet force is less.
Disclosure of Invention
The invention aims to provide a nozzle assembly of a dental blasting machine with reduced processing cost and a processing method thereof.
The processing method of the nozzle component of the dental blasting machine comprises the following steps:
step S1, obtaining a nozzle pipe, a gas pipeline and a water pipeline, and respectively connecting the gas pipeline and the water pipeline with the nozzle pipe and limiting;
s2, performing primary injection molding on the limited nozzle pipe, the gas pipeline and the water pipeline to obtain a nozzle framework; the gas pipeline and the water pipeline are arranged in the nozzle framework, the nozzle framework is provided with a water flow inlet of the water pipeline, the gas pipeline is provided with an exposed section exposed out of the nozzle framework, and the head end of the nozzle framework is a nozzle;
and step S3, performing secondary injection molding on the nozzle framework to form the nozzle shell.
In some embodiments, the limiting manner in step S1 is: the nozzle pipe is a two-section cylindrical pipe, the large-diameter section is connected with a gas pipeline, the small-diameter section is connected with a water pipeline, and gas flows out of an inner cavity of the nozzle pipe; the gas pipeline is provided with a mounting hole, the nozzle pipe is inserted into the mounting hole, and the nozzle pipe and the gas pipeline form an obtuse angle; the water pipeline is provided with a through hole, and the small-diameter section of the nozzle pipe penetrates through the through hole of the water pipeline.
Preferably, the nozzle tube is angled at 120 ° to the gas conduit. Since the gas duct is not an absolute straight line duct, the angle between the nozzle pipe and the gas duct is within the tolerance range, and the angle is considered to satisfy 120 °, not strictly 120 ° in the mathematical sense.
Another limiting method in step S1: the nozzle pipe, the gas pipeline and the water pipeline are limited by the connecting piece, the connecting piece is provided with a gas pipe interface, a water pipe interface and a steel pipe interface, the gas pipe interface and the water pipe interface are respectively communicated with the steel pipe interface, the nozzle pipe is fixed on the steel pipe interface, the gas pipeline is fixed on the gas pipe interface, and the water pipe interface is fixed on the water pipeline.
Preferably, the connecting element has a clamping surface. And (3) clamping and fixing the connecting piece, and respectively welding (such as laser welding) the nozzle pipe, the gas pipeline and the water pipeline to corresponding positions.
Preferably, the connecting piece includes first linkage segment and second linkage segment, and trachea interface and water pipe interface are located first linkage segment, and the steel pipe interface is located the second linkage segment, and first linkage segment is the contained angle with the second linkage segment, and this contained angle is corresponding with the turn angle degree of nozzle. For example, if the bending angle of the nozzle is 120 °, the included angle between the first connecting section and the second connecting section is also 120 °. And the bending part of the nozzle is aligned with the turning part of the first connecting section and the second connecting section. That is, the nozzle and the connector turn at corresponding positions, except that the connector is within the nozzle.
Preferably, the first connecting section and the second connecting section are respectively provided with respective clamping surfaces, and a step is arranged between the clamping surface of the first connecting section and the clamping surface of the second connecting section. When clamping, the clamping surface positions the plane reference, and the step positions the vertical plane reference.
Preferably, the first connecting section has a pair of symmetrically arranged clamping surfaces and the second connecting section has a pair of symmetrically arranged clamping surfaces.
Nozzle pipe
The mixture of powder and air is ejected from the inner cavity of the nozzle tube and the water stream is ejected from the gap between the nozzle tube and the nozzle.
As a scheme: the nozzle pipe comprises a pipe body with an inner cavity, the pipe body is provided with an air inlet through hole and a water diversion part, the air inlet through hole is communicated with the gas pipeline, and the water diversion part is communicated with the water pipeline.
As a preferred scheme, the nozzle pipe is provided with an air inlet through hole, a concave ring and a water guide groove, the air inlet through hole is communicated, the concave ring is communicated with the water guide groove, and the concave ring is communicated with the water pipeline; the water chute is a groove arranged on the surface of the nozzle pipe.
Preferably, the nozzle pipe is a pipe body with the same outer diameter, the concave ring divides the pipe body into an air pipe connecting section and a water guide section, the air inlet through hole is located in the air pipe connecting section, and the water guide groove is located in the water guide section. The part of the water diversion section except the water chute is contacted with the nozzle, and water flow is intensively sprayed out from the water chute, so that the water flow spraying force is improved, and the water flow is uniformly sprayed out at fixed points.
Preferably, the end of the water guide section is provided with an extension pipe, the extension pipe is cylindrical, and the extension pipe is smaller than the pipe body. Therefore, an annular gap is formed between the extension pipe and the nozzle, and water flows out of the water guide groove at a fixed point and then is converged into a ring at the extension pipe. When the nozzle is used, the water flow of all the diversion trenches is converged into a beam and then is sprayed out. The length of the extension pipe does not consume the strength of water flow ejection, and the water flow can be converged into a bundle to be ejected.
Preferably, the pipe body of the nozzle pipe is in interference fit with the steel pipe connecting channel of the connecting piece, the air pipe connecting section and the concave ring are positioned in the connecting piece, and part of the water guide section is exposed out of the connecting piece.
Nozzle framework
Preferably, in step S2, the nozzle frame includes a nozzle and a frame, the gas pipeline and the water pipeline are located in the frame, and the frame has a clamping portion and a joint portion. The joint part refers to a part connected with the machine body component; the nozzle framework is used for finishing injection molding, a machining clamp is clamped at the clamping part, and the joint part is machined. The gas pipeline and the water pipeline are positioned in the framework, that is, injection molding materials are filled between the gas pipeline and the water pipeline, the gas pipeline and the water pipeline are not completely wrapped by the injection molding materials, and the gas pipeline and/or the water pipeline can be partially exposed out of the framework.
The purpose of the machining is: when the inner surface of the nozzle framework is not formed into a shape matched with the machine body component during injection molding, a surface matched with the shape of the machine body component is processed. Or the inner surface of the nozzle framework has a primary shape matched with the machine body component during injection molding, but the injection molding precision cannot meet the assembly precision requirement of the machine body component and the nozzle, and the shape matched with the machine body component and meeting the precision requirement is machined.
Preferably, there is a step between the skeleton and the nozzle, the nozzle is wider than the skeleton, and the skeleton is gradually enlarged from the connection with the nozzle. The nozzle of the nozzle framework is the nozzle of the final shape, and the outer part of the framework is formed into a shell through injection molding in step S3. A groove for accommodating the decoration ring is formed between the nozzle and the nozzle shell.
Preferably, the framework is provided with a clamping part, and the clamping part is a cutting plane arranged on the surface of the framework. The number of the cutting planes is 1 or more, and the plurality of cutting planes are uniformly distributed along the outer surface of the framework. The clamping part limits the rotation of the framework around the shaft, and positions the framework for machining.
Preferably, the framework is provided with a biting groove, the shell is provided with a biting block extending into the biting groove, the biting groove is a groove positioned on the surface of the framework, and the biting block is a protruding block protruding relative to the inner wall of the shell. Preferably, the occlusion groove comprises a first groove group dislocated with the clamping part and a second groove group positioned on the clamping part; the occlusion grooves of the first groove group are distributed at equal intervals, and arc-shaped convex blocks which can be matched with the inner wall of the shell are arranged between the adjacent occlusion grooves.
Preferably, the water outlet is located in the skeleton. Preferably, the water conduit is beveled at the water flow inlet. The inclined water outlet increases the water inlet area. Preferably, the water flow inlet is angled towards the gas conduit. When the water inlet device is used, the gas pipeline is arranged above the water pipeline, and the inclined opening faces the water inlet of the gas pipeline and just receives water to enter, so that water can be conveniently fed, and the effective water inlet area is increased.
Exposed segment of gas pipeline
The exposed segment of the gas duct serves as a component connected to the air powder delivery line of the body assembly.
Preferably, the end of the exposed section of the gas duct has a flange.
Preferably, the exposed end of the gas conduit is fitted with a sealing cylinder as a component connected to the body assembly. Preferably, the sealing cylinder is made of flexible material, and the sealing cylinder is connected with the gas pipeline in a sealing mode. For example, the sealing cylinder is a silica gel cylinder and is connected with the gas pipeline in a sealing way. Preferably, the sealing cylinder is externally provided with a connecting shell. The connecting shell plays a role in supporting the sealing barrel and avoiding sand leakage or sand blockage caused by deformation of the sealing barrel due to the insertion of the machine body assembly and the gas pipeline.
Nozzle shell
The nozzle housing contacts the arcuate surface of the nozzle skeleton, and a space is provided between the nozzle housing and the nozzle to accommodate the trim ring, the nozzle housing, the trim ring, and the nozzle forming the appearance of the nozzle assembly.
Preferably, the nozzle housing is spaced from the nozzle, and the nozzle housing has an inwardly extending flange that wraps around the nozzle frame. Preferably, the nozzle housing is a tubular body of equal wall thickness.
Nozzle assembly of dental blasting machine
The utility model provides a nozzle assembly of dentistry sand blasting machine, includes nozzle shell, nozzle skeleton, gas conduit, water pipeling and nozzle pipe, and gas conduit and water pipeling are located nozzle skeleton, and nozzle shell cover is outside nozzle skeleton.
Preferably, the nozzle pipe is the nozzle pipe described above.
Preferably, the nozzle skeleton is the nozzle skeleton described above.
Preferably, the nozzle assembly comprises a connector which is wrapped in the nozzle framework. The connecting piece is the connecting piece.
The invention has the advantages that: 1. the nozzle shell and the nozzle framework are both plastic parts formed by injection molding, and the plastic material is used for replacing a metal material, so that the manufacturing cost is reduced. 2. The plastic nozzle framework is connected with the metal machine body component in a plug-in mode, and abrasion between the nozzle component and the machine body component is reduced by utilizing self-lubrication and abrasion resistance of plastic materials. 3. The positions among the nozzle pipe, the water pipeline and the gas pipeline are limited by the connecting piece, so that the displacement of the nozzle pipe, the water pipeline and/or the gas pipeline caused by the hydraulic pressure of the feed liquid during injection molding is avoided. 4. The nozzle pipe guides the water flow directionally through the water guide groove, so that the water flow sprayed out from the nozzle is uniform and the force is concentrated.
Drawings
FIG. 1 is a corresponding step of a first embodiment of a method of manufacturing a nozzle assembly.
Fig. 2 shows the corresponding steps of a second embodiment of the method of manufacturing the nozzle assembly.
Fig. 3 is a corresponding step of a third embodiment of a method of manufacturing a nozzle assembly.
Fig. 4 is a corresponding step of a fourth embodiment of a method of manufacturing a nozzle assembly.
FIG. 5 is a cross-sectional view of an embodiment of a nozzle assembly.
FIG. 6 is a schematic view of one configuration of a nozzle tube.
FIG. 7 is a schematic view of another configuration of a nozzle tube.
FIG. 8 is a schematic view of one configuration of a nozzle skeleton.
FIG. 9 is a schematic view of a second configuration of a nozzle skeleton.
Fig. 10 is a schematic view of fig. 9 from another angle.
FIG. 11 is a schematic view of the exposed end of the gas conduit in the nozzle assembly.
FIG. 12 is a general schematic view of the gas conduit exposed end fitted with a sealing cartridge.
FIG. 13 is a partial schematic view of the exposed end of the gas conduit of FIG. 12 fitted with a sealing cartridge.
Fig. 14 is a schematic view of the nozzle pipe, the gas pipe and the water pipe being fixed to the connector.
Fig. 15 is a graph showing the effect of water jet spray of a nozzle using a two-stage nozzle tube.
Fig. 16 is a diagram showing the effect of water jet injection using a nozzle having a nozzle pipe with a water guide groove.
A nozzle pipe 1; a large diameter section 101; a small diameter section 102; an inner cavity 103; an air inlet through hole 104; a concave ring 105; a water chute 106; an extension pipe 107; a trachea connection segment 108; a water diversion section 109; a gas pipe 2; an exposed end 201; a sealing cylinder 202; a first connection portion 2021; a second connection portion 2022; a transition chamber 2023; a connection housing 203; a water conduit 3; a water inlet 301; a nozzle skeleton 4; a nozzle 401; a skeleton 402; a clamping portion 4021; a joint portion 4022; a bite groove 403; cutting plane 404; positioning plane 4042; a nozzle housing 5; a connecting piece 6; a tracheal interface 601; a water pipe connection 602; a steel pipe interface 603; a first connection section 604; a first connecting section clamping face 6041; a second connection section 605; a second connecting section clamping face 6051; a groove 7; a decorative ring 8.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
the dental blasting machine carries out tooth treatment through an abrasive powder jet flow mixed with air and water, and the dental blasting machine comprises a machine body assembly and a nozzle assembly, wherein the machine body assembly is connected with the nozzle assembly in a plug-in mode.
Method for machining nozzle assembly
In some embodiments, a method of machining a nozzle assembly of a dental sander, as shown in FIG. 1, includes the steps of:
step S1, obtaining a nozzle pipe 1, a gas pipeline 2 and a water pipeline 3, wherein the nozzle pipe 1 is a two-section cylindrical pipe, a large-diameter section 101 is connected with the gas pipeline 2, a small-diameter section 102 is connected with the water pipeline 3, and gas flows out of an inner cavity 103 of the nozzle pipe 1;
for example, as shown in fig. 1, a gas pipeline 2 is provided with a mounting hole, a nozzle pipe 1 is inserted into the mounting hole, and the nozzle pipe 1 and the gas pipeline 2 form an obtuse angle; the water pipeline 3 is provided with a through hole, and the small-diameter section 102 of the nozzle pipe 1 penetrates through the through hole of the water pipeline 3, so that the communication and the limiting of the nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 are realized;
step S2, carrying out primary injection molding on the limited nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 to obtain a nozzle framework 4; plastics are filled among the gas pipeline 2, the water flow pipeline and the nozzle pipe 1, one end of the nozzle framework 4 is a nozzle 401, the other end of the nozzle framework is a joint part 4022 used for being connected with the machine body assembly, and the shape of the joint part 4022 is the same as that of the joint part 4022 of the existing nozzle assembly; the injection molding is carried out to obtain a nozzle 401, the nozzle 401 is tightly attached to the large-diameter section 101 of the nozzle pipe 1, and a gap is reserved between the nozzle 401 and the small-diameter section 102 of the nozzle pipe 1, namely, when the nozzle 401 is used, gas (air powder mixture) passes through an inner cavity 103 of the nozzle pipe 1, and water passes through the gap between the nozzle 401 and the small-diameter section 102;
machining the joint part 4022 of the nozzle framework 4, so that the precision of the joint part 4022 meets the precision requirement when the joint part is assembled with a machine body assembly;
and step S3, performing secondary injection molding on the machined nozzle framework 4, and performing injection molding to form the nozzle shell 5.
And step S4, installing the decorative ring between the nozzle and the nozzle shell, and finishing the manufacture of the nozzle assembly. The nozzle 401 is exposed to the nozzle housing 5 and forms the appearance of the nozzle assembly together with the nozzle housing 5.
When step S2 is performed to form nozzle skeleton 4 by injection molding, the clamping member is disposed at the position where groove 7 is to be formed, so that groove 7 can be formed, and the relative positions of gas pipeline 2 and water pipeline 3 are fixed during injection molding, thereby avoiding displacement of gas pipeline 2 and water pipeline 3 caused by feed liquid pressure.
The positional relationship between the water pipe 3, the gas pipe 2, and the nozzle pipe 1 is the same as the positional relationship between the water pipe 3, the gas pipe 2, and the nozzle pipe 1 of the conventional dental blasting machine.
Preferably, the nozzle pipe 1 is angled at 120 ° to the gas duct 2. Since the gas duct 2 is not an absolutely straight duct, the angle between the nozzle pipe 1 and the gas duct 2 is within the tolerance range, and the angle is considered to satisfy 120 °, not strictly 120 ° in the mathematical sense. A mounting hole can be formed through the gas pipeline 2, the nozzle pipe 1 is coaxial with the mounting hole, and the mounting hole is inclined relative to the gas pipeline 2. The included angle between the mounting hole and the gas pipeline 2 is the included angle between the nozzle pipe 1 and the gas pipeline 2.
In some embodiments, a method of machining a nozzle assembly of a dental sander, as shown in FIG. 1, includes the steps of:
step S1, obtaining a nozzle pipe 1, a gas pipeline 2 and a water pipeline 3, wherein the nozzle pipe 1 is a steel pipe with the same outer diameter, the nozzle pipe 1 is provided with a gas inlet through hole 104, a concave ring 105 and a water guide groove 106, the gas inlet through hole 104 penetrates through the pipe wall to be communicated with an inner cavity 103 of the steel pipe, the concave ring 105 is arranged on the surface of the nozzle pipe 1, the concave ring 105 is positioned between two sections of pipe bodies with the same outer diameter, the gas inlet through hole 104 is positioned in a gas pipe connecting section 108, the water guide groove 106 is positioned on the surface of a water guide section 109, and the water guide groove;
connecting the air pipe connecting section 108 where the air inlet through hole 104 is located with the air pipeline 2, and connecting the concave ring 105 with the water pipeline 3 to realize the limit of the nozzle pipe 1, the air pipeline 2 and the water pipeline 3; for example, as shown in fig. 2, the gas pipe 2 is provided with a mounting hole, the nozzle pipe 1 is inserted into the mounting hole, and the nozzle pipe 1 and the gas pipe 2 form an obtuse angle; the water pipeline 3 is provided with a through hole, the nozzle pipe 1 penetrates through the through hole of the water pipeline 3, and the through hole of the water pipeline 3 is aligned with the concave ring 105, so that the communication and the limiting of the nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 are realized;
step S2, carrying out primary injection molding on the limited nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 to obtain a nozzle framework 4; plastics are filled among the gas pipeline 2, the water flow pipeline and the nozzle pipe 1, one end of the nozzle framework 4 is a nozzle 401, the other end of the nozzle framework is a joint part 4022 used for being connected with the machine body assembly, and the shape of the joint part 4022 is the same as that of the joint part 4022 of the existing nozzle assembly; the injection-molded nozzle 401, the nozzle 401 is attached to the air pipe connecting section 108 of the nozzle pipe 1, a gap is reserved between the nozzle 401 and the concave ring 105, and the nozzle 401 is attached to the part of the second end pipe body except the water guide groove 106, namely, when the nozzle 401 is used, gas (air powder mixture) passes through the inner cavity 103 of the nozzle pipe 1, and water passes through the concave ring 105 and the water guide groove 106; water can only be sprayed out of the water chute 106, so that water flow is uniformly sprayed outwards at a fixed point; the parts of the nozzle pipe 1 except the water chute 106 are fixed by the nozzle 401, the position of the nozzle pipe 1 is stable, vibration caused by impact of water flow can be avoided, and the spraying force and uniformity of water discharged from the nozzle 401 can be improved;
machining the joint part 4022 of the nozzle framework 4, so that the precision of the joint part 4022 meets the precision requirement when the joint part is assembled with a machine body assembly;
and step S3, performing secondary injection molding on the machined nozzle framework 4, and performing injection molding to form the nozzle shell 5. The nozzle 401 is exposed to the nozzle housing 5, forming the appearance of the nozzle assembly together with the nozzle housing 5.
And step S4, installing the decorative ring between the nozzle and the nozzle shell, and finishing the manufacture of the nozzle assembly.
In some embodiments, in order to make the nozzle 401 uniformly discharge water in a ring shape, an extension pipe is disposed on the nozzle pipe 1, one end of the extension pipe is connected to the water guide section 109 of the nozzle pipe 1, the other end is a free end, and a gap between the extension pipe and the nozzle 401 is used as a water outlet of the nozzle 401. The extension pipe is additionally arranged, so that water flow sprayed out of the water guide groove 106 can be converged temporarily, the phenomenon that the nozzle 401 sprays water in a plurality of independent waterlines is avoided, and the uniformity of water outlet of the nozzle 401 is improved; and is beneficial to wrapping air powder in the water mist.
In some embodiments, a method of machining a nozzle assembly of a dental sander, as shown in FIG. 3, includes the steps of:
step S1, obtaining a nozzle pipe 1, a gas pipeline 2, a water pipeline 3 and a connecting piece 6, wherein the nozzle pipe 1 is a two-section cylindrical pipe, a large-diameter section 101 is connected with the gas pipeline 2, a small-diameter section 102 is connected with the water pipeline 3, and gas flows out of an inner cavity 103 of the nozzle pipe 1;
the connecting piece 6 is provided with an air pipe connector 601, a water pipe connector 602 and a steel pipe connector 603, the air connector and the water pipe connector 602 are respectively communicated with the steel pipe connector 603, the air pipeline 2 is fixed on the air pipe connector 601, the water pipe connector 602 is fixed on the water pipeline 3, the large-diameter section 101 of the nozzle pipe 1 is fixed on the steel pipe connector 603, and the water pipe connector 602 is aligned with the small-diameter section 102 of the nozzle pipe 1 as shown in fig. 3;
step S2, carrying out primary injection molding on the limited nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 to obtain a nozzle framework 4; plastics are filled among the gas pipeline 2, the water flow pipeline and the nozzle pipe 1, one end of the nozzle framework 4 is a nozzle 401, the other end of the nozzle framework is a joint part 4022 used for being connected with the machine body assembly, and the shape of the joint part 4022 is the same as that of the joint part 4022 of the existing nozzle assembly; the injection molding is carried out to obtain a nozzle 401, the nozzle 401 is tightly attached to the large-diameter section 101 of the nozzle pipe 1, and a gap is reserved between the nozzle 401 and the small-diameter section 102 of the nozzle pipe 1, namely, when the nozzle 401 is used, gas (air powder mixture) passes through an inner cavity 103 of the nozzle pipe 1, and water passes through the gap between the nozzle 401 and the small-diameter section 102;
machining the joint part 4022 of the nozzle framework 4, so that the precision of the joint part 4022 meets the precision requirement when the joint part is assembled with a machine body assembly;
and step S3, performing secondary injection molding on the machined nozzle framework 4, and performing injection molding to form the nozzle shell 5. The nozzle 401 is exposed to the nozzle housing 5, forming the appearance of the nozzle assembly together with the nozzle housing 5.
And step S4, installing the decorative ring between the nozzle and the nozzle shell, and finishing the manufacture of the nozzle assembly.
When step S2 is performed to form nozzle skeleton 4 by injection molding, the clamping member is disposed at the position where groove 7 is to be formed, so that groove 7 can be formed, and the relative positions of gas pipeline 2 and water pipeline 3 are fixed during injection molding, thereby avoiding displacement of gas pipeline 2 and water pipeline 3 caused by feed liquid pressure. The positional relationship between the water pipe 3, the gas pipe 2, and the nozzle pipe 1 is the same as the positional relationship between the water pipe 3, the gas pipe 2, and the nozzle pipe 1 of the conventional dental blasting machine.
In some embodiments, a method of machining a nozzle assembly of a dental sander, as shown in fig. 4, includes the steps of:
step S1, obtaining a nozzle pipe 1, a gas pipeline 2, a water pipeline 3 and a connecting piece 6, wherein the nozzle pipe 1 is a steel pipe with the same outer diameter, the nozzle pipe 1 is provided with a gas inlet through hole 104, a concave ring 105 and a water guide groove 106, the gas inlet through hole 104 penetrates through the pipe wall to be communicated with an inner cavity 103 of the steel pipe, the concave ring 105 is arranged on the surface of the nozzle pipe 1, the concave ring 105 is positioned between two sections of pipe bodies with the same outer diameter, the gas inlet through hole 104 is positioned in a gas pipe connecting section 108, the water guide groove 106 is positioned on the surface of a water guide section 109, and the water;
the connecting piece 6 is provided with an air pipe connector 601, a water pipe connector 602 and a steel pipe connector 603, the air connector and the water pipe connector 602 are respectively communicated with the steel pipe connector 603, the air pipeline 2 is fixed on the air pipe connector 601, the water pipe connector 602 is fixed on the water pipeline 3, the air pipe connecting section 108 of the nozzle pipe 1 is fixed on the steel pipe connector 603, the air inlet through hole 104 is communicated with the air pipe connector 601, the air pipeline 2 and the inner cavity 103 of the nozzle pipe 1, and the water pipe connector 602 is aligned with the concave ring 105;
step S2, carrying out primary injection molding on the limited nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 to obtain a nozzle framework 4; plastics are filled among the gas pipeline 2, the water flow pipeline and the nozzle pipe 1, one end of the nozzle framework 4 is a nozzle 401, the other end of the nozzle framework is a joint part 4022 used for being connected with the machine body assembly, and the shape of the joint part 4022 is the same as that of the joint part 4022 of the existing nozzle assembly; the injection molding is carried out to obtain a nozzle 401, the nozzle 401 is tightly attached to the large-diameter section 101 of the nozzle pipe 1, and a gap is reserved between the nozzle 401 and the small-diameter section 102 of the nozzle pipe 1, namely, when the nozzle 401 is used, gas (air powder mixture) passes through an inner cavity 103 of the nozzle pipe 1, and water passes through the gap between the nozzle 401 and the small-diameter section 102;
machining the joint part 4022 of the nozzle framework 4, so that the precision of the joint part 4022 meets the precision requirement when the joint part is assembled with a machine body assembly;
and step S3, performing secondary injection molding on the machined nozzle framework 4, and performing injection molding to form the nozzle shell 5. The nozzle 401 is exposed to the nozzle housing 5, forming the appearance of the nozzle assembly together with the nozzle housing 5.
And step S4, installing the decorative ring between the nozzle and the nozzle shell, and finishing the manufacture of the nozzle assembly.
In some embodiments, the connector 6 of step S1 has a clamping surface. The connecting piece 6 is clamped and fixed, and then the nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 are respectively welded (such as laser welding) to corresponding positions. The connecting piece 6 comprises a first connecting section and a second connecting section, the air pipe connector 601 and the water pipe connector 602 are located in the first connecting section, the steel pipe connector 603 is located in the second connecting section, the first connecting section and the second connecting section form an included angle, and the included angle corresponds to the turning angle of the nozzle 401. For example, if the bending angle of the nozzle 401 is 120 °, the included angle between the first connection section and the second connection section is also 120 °. And, the bent portion of the nozzle 401 is aligned with the turning portion of the first connection section and the second connection section. That is, the nozzle 401 turns at a corresponding position to the connector 6, except that the connector 6 is inside the nozzle 401.
Nozzle assembly of dental blasting machine
The dental sand blasting machine comprises a machine body assembly and a spraying assembly, wherein the machine body assembly is connected with a nozzle assembly in an insertion mode, and the machine body assembly and the nozzle assembly are respectively provided with a joint part 4022 for insertion.
The nozzle component is a component which can be disassembled, disinfected and directly contacted with a patient in the dental blasting machine, and comprises a nozzle shell 5, a nozzle framework 4, a gas pipeline 2, a water pipeline 3 and a nozzle pipe 1. The gas pipe 2 carries the air powder mixture in gaseous state and the water from the outer surface of the nozzle pipe 1. When the gas and the water are sprayed out simultaneously, the air powder mixture is inside and the water is outside.
In some embodiments, as shown in fig. 5, a nozzle assembly of a dental blasting machine comprises a nozzle housing 5, a nozzle skeleton 4, a gas pipeline 2, a water pipeline 3 and a nozzle pipe 1, wherein the nozzle skeleton 4 comprises a nozzle 401 and a skeleton 402, the skeleton 402 is provided with a joint part 4022 for connecting with a machine body assembly, the gas pipeline 2 and the water pipeline 3 are positioned in the skeleton 402, the nozzle pipe 1 is arranged in the nozzle 401, and the nozzle housing 5 is injected outside the nozzle skeleton 4; the nozzle frame 4 and the nozzle housing 5 are plastic parts, respectively. The gas pipeline 2 and the water pipeline 3 are positioned in the nozzle framework 4, which means that the injection molding material of the nozzle framework 4 is filled between the gas pipeline 2 and the water pipeline 3, and the gas pipeline 2 and the water pipeline 3 can be partially exposed out of the injection molding material or completely wrapped in the injection molding material.
Nozzle pipe
The nozzle pipe 1 is a component of a nozzle assembly, and the nozzle pipe 1 is used for outputting gas and water mist. The mixture of powder and air is ejected from the inner cavity 103 of the nozzle tube 1 and a stream of water is ejected from the gap between the nozzle tube 1 and the nozzle 401.
In some embodiments: the nozzle pipe 1 comprises a pipe body provided with an air inlet through hole 104 and a water diversion part, the air inlet through hole 104 is communicated with the gas pipeline 2, and the water diversion part is communicated with the water pipeline 3.
In some embodiments, as shown in fig. 6, the nozzle pipe 1 is a steel pipe with a uniform outer diameter, and is provided with an air inlet through hole 104, a concave ring 105 and a water chute 106, the air inlet through hole 104 is communicated, the concave ring 105 is communicated with the water chute 106, and the concave ring 105 is communicated with the water pipe 3; the water chute 106 is a groove 7 opened on the surface of the nozzle pipe 1.
The concave ring 105 divides the pipe body into an air pipe connecting section 108 and a water guide section 109, the air inlet through hole 104 is positioned in the air pipe connecting section 108, and the water guide groove 106 is positioned in the water guide section 109. The water guide section 109 is in contact with the nozzle 401 except the water chute 106, and the water flow is intensively sprayed out from the water chute 106, so that the water flow spraying force is improved, and the water flow is uniformly sprayed out at a fixed point.
In some embodiments, as shown in fig. 7, the end of the water guiding section 109 is provided with an extension pipe, and the extension pipe is cylindrical. Therefore, an annular gap is formed between the extension pipe and the nozzle 401, and water flows out through the water chute 106 at a fixed point and then converges into a ring at the extension pipe. When the nozzle 401 is used, the water flows of all the diversion trenches are converged into a bundle and then are sprayed out. The length of the extension pipe does not consume the strength of water flow ejection, and the water flow can be converged into a bundle to be ejected.
Nozzle framework
The nozzle skeleton 4 is a part of the nozzle assembly, and the nozzle skeleton 4 is injection molded. The nozzle skeleton 4 has a nozzle 401 and a nipple 4022 for connection to a body component. That is, the nozzle assembly assumes the functions of connecting the body assembly, protecting and positioning the gas conduit 2, the water conduit 3, and outputting the gas and stream.
In some embodiments, nozzle frame 4 includes nozzle 401 and frame 402, gas conduit 2 and water conduit 3 are located in frame 402, and frame 402 has clamp 4021 and joint 4022.
The nozzle frame 4 is used for injection molding, and is clamped in the clamping portion 4021 by a machining jig, and the joint portion 4022 is machined. The gas pipeline 2 and the water pipeline 3 are located in the framework 402, which means that the injection molding material is filled between the gas pipeline 2 and the water pipeline 3, the injection molding material does not completely wrap the gas pipeline 2 and the water pipeline 3, and the gas pipeline 2 and/or the water pipeline 3 can be partially exposed out of the framework 402. The purpose of the machining is: when the inner surface of the nozzle framework 4 is not formed into a shape matched with the machine body component during injection molding, a surface matched with the shape of the machine body component is processed. Or, the inner surface of the nozzle frame 4 has a preliminary shape matching the body component during injection molding, but the injection molding precision cannot meet the assembly precision requirement of the body component and the nozzle 401, and the shape matching the body component and meeting the precision requirement is machined.
In some embodiments, there is a step between the backbone 402 and the nozzle 401, the nozzle 401 is wider than the backbone 402, and the backbone 402 tapers back from the connection with the nozzle 401. The nozzle 401 of the nozzle frame 4 is the final nozzle 401
The framework is provided with a clamping part which is a cutting plane 404 arranged on the surface of the framework. There are 1 or more cutting planes 404, and the plurality of cutting planes 404 are uniformly distributed along the outer surface of the framework. The clamping part limits the rotation of the framework around the shaft, and positions the framework for machining.
The skeleton is provided with a snap groove 403, the shell is provided with a snap block extending into the snap groove 403, the snap groove 403 is a groove positioned on the surface of the skeleton, and the snap block is a protruding block protruding relative to the inner wall of the shell. Preferably, the bite grooves 403 comprise a first groove set dislocated from the holder, and a second groove set located on the holder; the engagement grooves 403 of the first groove set are distributed at equal intervals, and arc-shaped convex blocks matched with the inner wall of the shell are arranged between adjacent engagement grooves 403.
In some embodiments, the water outlet of the water conduit 3 is located at the skeleton 402. Preferably, the water conduit 3 is beveled at the water inlet 301. The inclined water outlet increases the water inlet area. Preferably, the water inlet 301 is angled towards the gas pipe 2. During the use, gas pipeline 2 is on water pipeling 3, and the bevel connection just in time accepts water and gets into towards 2 rivers imports 301 of gas pipeline, makes things convenient for into water, increases effective area of intaking.
Gas pipeline
The gas duct, which serves as a delivery duct for the air-powder mixture, is a component of the nozzle assembly. The gas duct of the nozzle block assembly needs to communicate with the gas duct 2 of the body assembly to deliver the air powder mixture to the nozzle 401.
In some embodiments, the gas conduit 2 has an exposed end 201 exposed to the nozzle skeleton 4. The exposed end 201 is used for sealing connection with the gas pipe 2 of the machine body assembly.
Preferably, the exposed end 201 of the gas pipe 2 is fitted with a sealing cylinder 202, and the sealing cylinder 202 is hermetically connected with the gas pipe 2. In this way, the gas pipe 2 of the machine body assembly is inserted into the sealing cylinder 202 and is connected with the sealing cylinder 202 in a sealing manner, and the sealing cylinder 202 is used as a part for connecting and sealing the gas pipe 2 of the nozzle assembly and the gas pipe 2 of the machine body assembly, so that the aims of preventing sand blockage and sand leakage in the process of conveying the air powder mixture are fulfilled. Preferably, the sealing cylinder 202 is made of a flexible material, and the sealing cylinder 202 is connected with the gas pipeline 2 in a sealing manner. For example, the sealing cylinder 202 is a silicone cylinder, and the sealing cylinder 202 is hermetically connected to the gas pipe 2. Preferably, there is a connecting housing 203 outside the sealed canister 202. The connection housing 203 serves to support the sealing cylinder 202 and prevent the sealing cylinder 202 from being deformed to cause sand leakage or sand blockage due to the insertion of the body assembly and the gas pipe 2. Preferably, the sealing cylinder 202 comprises a first connection portion 2021 and a second connection portion 2022 at both ends, and a transition chamber 2023, the transition chamber 2023 is located between the first connection portion 2021 and the second connection portion 2022, the first connection portion 2021 is connected to the exposed end 201 of the gas conduit 2 of the nozzle assembly, and the second connection portion 2022 is used for connecting to the gas conduit 2 of the body assembly. That is to say, the gas pipeline 2 of the machine body assembly is not in direct contact with the gas pipeline 2 of the nozzle assembly, but is in contact with the sealing cylinder 202 respectively, the sealing cylinder 202 is made of flexible material, and the sealing cylinder 202 has good wear resistance and good elastic deformation and deformation recovery capability, so that sand leakage and sand blockage are delayed.
Preferably, the exposed end 201 of the gas pipe 2 has a convex edge, and the sealing cylinder 202 has a locking groove matched with the convex edge, and the convex edge is located in the locking groove. The convex edge and the clamping groove are matched, so that the connection stability of the sealing cylinder 202 and the gas pipeline 2 is improved.
Nozzle shell
The nozzle housing 5 and the nozzle 401 of the nozzle frame 4 together form the appearance of the nozzle assembly, and the nozzle housing 5 is formed by secondary injection molding on the basis of the nozzle frame 4.
Preferably, the nozzle housing 5 is sleeved outside the nozzle framework 4, and one end of the nozzle housing 5 far away from the nozzle 401 is provided with an inward extending folded edge which wraps the nozzle framework 4. Preferably, the nozzle housing 5 is a tube body of equal wall thickness.
Preferably, there is a space between the nozzle housing 5 and the nozzle 401 to accommodate the trim ring 8.
Connecting piece
Before injection molding of the nozzle skeleton 4, the nozzle pipe 1, the gas pipe 2 and the water pipe 3 need to be positioned. The connecting piece 6 is a rigid piece (such as a metal block) and fixes the nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 with the connecting piece 6 respectively, so that the nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 are in rigid connection, and the nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 can bear the impact of plastic fluid and do not generate relative displacement during injection molding; the reliability and positional accuracy of the connection of the nozzle pipe 1, the gas pipe 2 and the water pipe 3 are maintained.
In some embodiments, the nozzle assembly includes a connector 6, the connector 6 being encased within the nozzle skeleton 4. The connecting member 6 is the connecting member 6 described above.
The connecting piece 6 has a clamping surface. The connecting piece 6 is clamped and fixed, and then the nozzle pipe 1, the gas pipeline 2 and the water pipeline 3 are respectively welded (such as laser welding) to corresponding positions.
In some embodiments, the connecting member 6 includes a first connecting section clamping surface 6064 and a second connecting section, the air pipe connector 601 and the water pipe connector 602 are located on the first connecting section clamping surface 6064, the steel pipe connector 603 is located on the second connecting section, the first connecting section clamping surface 6064 and the second connecting section form an included angle, and the included angle corresponds to the turning angle of the nozzle 401. The included angle between the first connecting section clamping face 6064 and the second connecting section can be set as required, for example, the bending angle of the nozzle 401 is 120 °, and then the included angle between the first connecting section clamping face 6064 and the second connecting section is also 120 °. And the bent portion of the nozzle 401 is aligned with the bent portion of the first connecting section clamping surface 6064 and the second connecting section. That is, the nozzle 401 turns at a corresponding position to the connector 6, except that the connector 6 is inside the nozzle 401.
The first connecting section clamping surface 6064 and the second connecting section have respective clamping surfaces, and the first connecting section clamping surface 6064 has a positioning step. When inserting nozzle pipe 1 into steel pipe interface 603, the step can support tight anchor clamps, avoids the power of connecting piece 6 when inserting because of gas pipeline 2 and water pipeling 3 to appear the displacement.
The first connecting section clamping face 6064 has a pair of symmetrically disposed clamping faces and the second connecting section has a pair of symmetrically disposed clamping faces. Symmetrical clamping surfaces are arranged to clamp the connecting piece 6 oppositely and limit the rotational displacement and the translational displacement of the connecting piece 6.
Injection molding nozzle
In some embodiments, the injection nozzle 401 of the dental blasting machine comprises a nozzle 401 body, a gas channel, a water channel and a nozzle pipe 1 are arranged in the nozzle 401 body, the nozzle pipe 1 is provided with a gas inlet through hole 104, the gas inlet through hole 104 is communicated with the gas channel and an inner cavity 103 of the nozzle pipe 1, a water inlet groove and a water guide groove 106 are arranged on the surface of the nozzle pipe 1, and the water inlet groove is communicated with the water channel; one end of the water chute 106 is communicated with the water inlet tank, and the other end is a water outlet of the nozzle 401; the nozzle pipe 1 is tightly matched with the nozzle 401 body, that is, between the nozzle pipe 1 and the nozzle 401 body, only the water inlet groove and the water guide groove 106 are arranged, and gaps are arranged between the outer surface of the nozzle pipe 1 and the nozzle 401 body, and the rest part of the nozzle pipe 1 is attached to the nozzle 401 body, so that water flow from the water channel can only be sprayed out from the water guide groove 106 after entering the water inlet groove.
In some embodiments, the water intake channel is a ring of recessed rings 105 disposed along the exterior of the steel pipe, as shown. Alternatively, the water inlet channel is communicated with the water guide channel 106 through a ring of water guide rings. The water guide ring is a concave ring with the width larger or smaller than that of the water inlet groove. The water guide grooves 106 are plural, and the water guide grooves 106 are uniformly distributed along the outer surface of the nozzle pipe 1. The larger the number of the water guide grooves 106, the more and more uniform the jetted water jet. However, the more the water chutes 106 are, the smaller the interval between the adjacent water chutes 106 is, and the adjacent water flow is liable to disturb the turbulent flow, and preferably, the number of the water chutes 106 is 4 to 8. The gutter 106 serves to direct the water flow and to concentrate the water jet force. As shown in fig. 14, an annular gap is formed between the nozzle pipe 1 and the nozzle 401, and water is ejected from the annular gap. When the nozzle pipe 1 of 8 water chutes 106 shown in fig. 15 is used for the nozzle 401, the water flow is concentrated and uniform compared to fig. 14.
In some embodiments, the nozzle tube 1 is flush with the nozzle 401 outlet. Alternatively, the nozzle pipe 1 is exposed to the nozzle 401. The nozzle 401 is slightly exposed out of the nozzle 401, the nozzle pipe 1 continues to play a role in guiding water flow after the water flow is sprayed out of the nozzle 401, and the outlet of the nozzle pipe 1 serves as a gas spraying port, so that the water flow is firstly separated from the constraint of the nozzle 401, and the gas is sprayed out of the nozzle pipe 1, thereby being beneficial to reducing the influence of the water flow on the gas flow and being beneficial to wrapping the gas flow in the water flow
In some embodiments, the nozzle tube 1 has a cylindrical extension tube with an outlet as a gas ejection port of the nozzle 401, the extension tube being smaller than the nozzle tube 1. The surface of the extension pipe is not provided with the water chutes 106, and water beams sprayed from the water chutes 106 are temporarily converged and guided in the extension pipe, so that all the water beams are converged into a circle.
In some embodiments, the extension pipe has an inner segment located inside the nozzle 401 and an outer segment exposed to the nozzle 401, and the inner segment is connected to the nozzle pipe 1. The water streams are briefly converged between the extension pipe and the nozzle 401 and then are annularly ejected. The extension pipe is beneficial to water beam convergence and does not weaken the jet force of water flow.
When the nozzle assembly is used, the nozzle assembly is spliced with the machine body assembly, and the gas pipeline 2 of the machine body assembly and the gas pipeline 2 of the spraying assembly are simultaneously positioned in the sealing cylinder 202; the nipple 4022 of the nozzle assembly is in sealing engagement with the nipple 4022 of the body assembly, and the water outlet of the body assembly is sealed in the same segment as the water inlet 301 of the nozzle assembly. Water enters the water pipe 3 from the water inlet 301 and the air-powder mixture is confined in the sealing cylinder 202 and enters the gas pipe 2. The air powder mixture is sprayed out from the outlet of the nozzle pipe 1 through the air pipeline 2, the air inlet through hole 104 and the inner cavity 103 of the nozzle pipe 1, water is sprayed out from the water guide groove 106 through the water pipeline 3 and the water inlet groove, the air powder mixture is in the water beam, the water beam externally restricts the diffusion of the air powder mixture, the air powder mixture and the water are converged and sprayed outwards, and the fluid is sprayed onto teeth of a user to remove dental plaque, dental calculus and the like.
The invention shown and described herein may be practiced in the absence of any element or elements, limitation or limitations, which is specifically disclosed herein. The terms and expressions which have been employed are used as terms of description and not of limitation, and there is no intention in the use of such terms and expressions of excluding any equivalents of the features shown and described or portions thereof, and it is recognized that various modifications are possible within the scope of the invention. It should therefore be understood that although the present invention has been specifically disclosed by various embodiments and optional features, modification and variation of the concepts herein described may be resorted to by those skilled in the art, and that such modifications and variations are considered to be within the scope of this invention as defined by the appended claims.
The contents of the articles, patents, patent applications, and all other documents and electronically available information described or cited herein are hereby incorporated by reference in their entirety to the same extent as if each individual publication was specifically and individually indicated to be incorporated by reference. Applicants reserve the right to incorporate into this application any and all materials and information from any such articles, patents, patent applications, or other documents.
Claims (10)
1. The processing method of the nozzle component of the dental blasting machine comprises the following steps:
step S1, obtaining a nozzle pipe, a gas pipeline and a water pipeline, and respectively connecting the gas pipeline and the water pipeline with the nozzle pipe and limiting;
s2, performing primary injection molding on the limited nozzle pipe, the gas pipeline and the water pipeline to obtain a nozzle framework; the gas pipeline and the water pipeline are arranged in the nozzle framework, the nozzle framework is provided with a water flow inlet of the water pipeline, the gas pipeline is provided with an exposed section exposed out of the nozzle framework, and the head end of the nozzle framework is a nozzle;
and step S3, performing secondary injection molding on the nozzle framework to form the nozzle shell.
2. A method of machining a nozzle assembly for a dental burr sander as set forth in claim 1, wherein: in step S1, the gas pipe is provided with a mounting hole, the nozzle pipe is inserted into the mounting hole, and the nozzle pipe and the gas pipe form an obtuse angle; the water pipeline is provided with a through hole, and the small-diameter section of the nozzle pipe penetrates through the through hole of the water pipeline.
3. A method of machining a nozzle assembly for a dental burr sander as set forth in claim 1, wherein: in the step S1, the nozzle pipe, the gas pipeline and the water pipeline are limited by a connector, the connector has a gas pipe interface, a water pipe interface and a steel pipe interface, the gas interface and the water pipe interface are respectively communicated with the steel pipe interface, the nozzle pipe is fixed to the steel pipe interface, the gas pipeline is fixed to the gas pipe interface, and the water pipe interface is fixed to the water pipeline.
4. A nozzle assembly of a dental blasting machine, characterized in that: the nozzle assembly comprises a nozzle shell, a nozzle framework, a gas pipeline, a water pipeline and a nozzle pipe, wherein the nozzle framework comprises a nozzle and a framework, the framework is provided with a joint part used for being connected with the machine body assembly, the gas pipeline and the water pipeline are positioned in the framework, the nozzle pipe is arranged in the nozzle, and the nozzle shell is injected outside the nozzle framework; the nozzle framework and the nozzle shell are respectively plastic parts.
5. The dental sander nozzle assembly of claim 4, wherein: the nozzle pipe comprises a pipe body with an inner cavity, the pipe body is a two-section type cylinder, the large-diameter section is provided with an air inlet through hole, the small-diameter section is used as a water guide part, and the water guide part is communicated with a water pipeline; or the nozzle pipe is a steel pipe with the same outer diameter and is provided with an air inlet through hole, a concave ring and a water guide groove, the air inlet through hole is communicated, the concave ring is communicated with the water guide groove, and the concave ring is communicated with the water pipeline; the water chute is a groove arranged on the surface of the nozzle pipe; the air inlet through hole is positioned in the air pipe connecting section, and the water guide groove is positioned in the water guide section.
6. The dental sander nozzle assembly of claim 4, wherein: the nozzle framework comprises a nozzle and a framework, the gas pipeline and the water pipeline are positioned in the framework, and the framework is provided with a clamping part and a joint part.
7. The dental sander nozzle assembly of claim 4, wherein: the framework is provided with a first clamping part and a second clamping part, and the first clamping part limits the front and back displacement of the framework along the axial direction and the rotation displacement around the axial direction; the second clamping part limits the rotation displacement of the framework; first clamping portion is including connecting the flat board and following the multiunit lug that the flat board set up, and gas pipeline and water pipeling are in connecting the flat board, and skeleton axial interval distribution is followed to a plurality of archs.
8. The dental sander nozzle assembly of claim 4, wherein: the gas pipeline is provided with an exposed end exposed out of the nozzle framework; the exposed end of the gas pipeline is provided with a sealing cylinder, and the sealing cylinder is connected with the gas pipeline in a sealing way.
9. The dental sander nozzle assembly of claim 4, wherein: the nozzle assembly comprises a connecting piece, and the connecting piece is wrapped in the nozzle framework; the connecting piece has trachea interface, water pipe interface and steel pipe interface, and gas interface and water pipe interface communicate with the steel pipe interface respectively, and the nozzle pipe is fixed in the steel pipe interface, and gas pipeline is fixed in the trachea interface, and the water pipe interface is fixed in the water pipeling.
10. The dental sander nozzle assembly of claim 4, wherein: the nozzle shell is sleeved outside the nozzle framework, and one end, far away from the nozzle, of the nozzle shell is provided with an inward extending folded edge which wraps the nozzle framework.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811055688.8A CN110884028A (en) | 2018-09-11 | 2018-09-11 | Nozzle assembly of dental blasting machine and machining method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811055688.8A CN110884028A (en) | 2018-09-11 | 2018-09-11 | Nozzle assembly of dental blasting machine and machining method thereof |
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| CN110884028A true CN110884028A (en) | 2020-03-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113940774A (en) * | 2021-10-29 | 2022-01-18 | 上海驻净电子科技有限公司 | Spiral curve pulse type tooth flushing device nozzle head |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105188595A (en) * | 2013-03-07 | 2015-12-23 | 株式会社中西 | Dental handpiece nozzle |
| CN209107637U (en) * | 2018-09-11 | 2019-07-16 | 杭州四方医疗器械有限公司 | The nozzle assembly of dentistry sand-blasting machine |
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2018
- 2018-09-11 CN CN201811055688.8A patent/CN110884028A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105188595A (en) * | 2013-03-07 | 2015-12-23 | 株式会社中西 | Dental handpiece nozzle |
| CN209107637U (en) * | 2018-09-11 | 2019-07-16 | 杭州四方医疗器械有限公司 | The nozzle assembly of dentistry sand-blasting machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113940774A (en) * | 2021-10-29 | 2022-01-18 | 上海驻净电子科技有限公司 | Spiral curve pulse type tooth flushing device nozzle head |
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Address after: 311100 rooms 101, 201 and 301, building 46, No. 488-1, Donghu North Road, Donghu street, Yuhang District, Hangzhou City, Zhejiang Province Applicant after: Yimaisi electronic medical system (Hangzhou) Co.,Ltd. Address before: 310000 Room 501, building 14, No. 488-1, Donghu North Road, Donghu street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: HANGZHOU SIFANG MEDICAL APPARATUS CO.,LTD. |
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Application publication date: 20200317 |