阅读说明：本技术 一种偏置式流体喷嘴 (Offset fluid nozzle ) 是由 王志亮 于 2020-12-07 设计创作，主要内容包括：本发明涉及一种偏置式流体喷嘴,包括中心转轴、转轴头、偏置喷嘴主体段和偏置喷嘴出口段,中心转轴的前端连接转轴头,偏置喷嘴主体段的前端连接偏置喷嘴出口段,中心转轴插置于喷嘴主体段内腔中。流体在上游压力作用下于中心转轴和转轴头连接体与偏置喷嘴主体段和偏置喷嘴出口段连接体之间流通,并于偏置喷嘴出口段偏置流出,利用流体和固体相互作用操控中心转轴的运动,可实现非规则复杂可控射流流动。本发明能应用于粉末冶金、喷墨、喷涂、喷胶、焊接、印刷、快速成形等喷射工艺,利用喷嘴的非规则流动特点,产生复杂的喷射流体行为,使喷射效果多样化,可以做为传统喷射的补充,也可以形成独立的喷射工艺。(The invention relates to an offset fluid nozzle which comprises a central rotating shaft, a rotating shaft head, an offset nozzle main body section and an offset nozzle outlet section, wherein the front end of the central rotating shaft is connected with the rotating shaft head, the front end of the offset nozzle main body section is connected with the offset nozzle outlet section, and the central rotating shaft is inserted into an inner cavity of the nozzle main body section. Fluid circulates between the central rotating shaft and the rotating shaft head connecting body and between the offset nozzle main body section and the offset nozzle outlet section connecting body under the action of upstream pressure and flows out in an offset manner at the offset nozzle outlet section, and the movement of the central rotating shaft is controlled by the interaction of the fluid and solid, so that irregular complex controllable jet flow can be realized. The invention can be applied to the spraying processes of powder metallurgy, ink jet, spraying, glue spraying, welding, printing, rapid forming and the like, utilizes the irregular flowing characteristic of the nozzle to generate complex spraying fluid behaviors, diversifies the spraying effect, can be used as the supplement of the traditional spraying, and can also form an independent spraying process.)

1. An offset fluid nozzle comprising a central spindle (1), a spindle head (3), an offset nozzle body section (2) and an offset nozzle outlet section (4), characterized in that: the front end of the central rotating shaft (1) is connected with a rotating shaft head (3), and the front end of the offset nozzle main body section (2) is connected with an offset nozzle outlet section (4); the central rotating shaft (1) is inserted into the inner cavity of the nozzle main body section (2); fluid (5) flows and passes through gaps between the central rotating shaft (1) and rotating shaft head (3) connecting bodies and the offset nozzle main body section (2) and offset nozzle outlet section (4) connecting bodies under the action of upstream pressure, and flows out in an offset manner from the offset nozzle outlet section (4), and the movement of the central rotating shaft (1) is controlled under the action of surface tension and fluid flow, so that diversified, irregular, complex and controllable flow behaviors are realized.

2. The offset fluid nozzle of claim 1, wherein: the motion of central pivot is controlled in central pivot (1) and pivot head (3), adopts the integration to make or through other connected modes, includes: splicing, pin-jointing, welding or bolt-connecting; the central rotating shaft (1) is of a central rotating structure, but the shape line or the generatrix is a straight line or a curve, and the surfaces of the central rotating shaft (1) and the rotating shaft head (3) are smooth or have concave-convex textures.

3. The offset fluid nozzle of claim 1 or 2, wherein: the central rotating shaft (1) can perform axial motion in a fixed range from an upstream input torque, integral or local energy, and the motion is telescopic motion, periodic vibration or displacement motion with a given waveform.

4. The offset fluid nozzle of claim 1 or 2, wherein: the rotating shaft head (3) is in a cone, a frustum, a sphere-like shape or a non-rotary structure shape.

5. The offset fluid nozzle according to claim 1, wherein: the offset nozzle main body section (2) and the offset nozzle outlet section (4) are not necessarily of a rotary structure and do not necessarily coincide with the geometric centers of the cross sections of the connecting bodies of the central rotating shaft (1) and the rotating shaft head (3); the outlet cross section of the offset nozzle outlet section (4) does not necessarily have to be on a flat cross section.

6. The offset fluid nozzle according to claim 1, wherein: the fluid (5) is a solid particle flow, a liquid, a gas, a colloid or a mixed fluid of states or a solid-like or fluid-like body which can flow under pressure, and the constitutive relation of the fluid is Newtonian fluid or non-Newtonian fluid.

Technical Field

The invention relates to an offset fluid nozzle. It is capable of producing complex controllable jets of multiple shapes and irregularities. Can be widely applied to the jet flow spraying fields of powder metallurgy, ink jet, spraying, composite material preparation, jet printing, glue spraying, welding, combustion and the like. Complication and diversification of ejection is achieved.

Background

The invention is originated from the process research of glue solution distribution technology and spray atomization metallurgy technology in the semiconductor packaging industry.

Semiconductor packaging glue solution distribution technology is an important process in microelectronic technology, and through decades of development, various technologies appear in sequence, including contact dispensing (contact dispensing), mass dispensing (mass dispensing), non-contact dispensing/dispensing (non-contact dispensing/dispensing jet), and the like. At present, contact dispensing is the most common glue solution dispensing technology, while non-contact dispensing (glue spraying) has the characteristics of high precision, high speed and the like, and is considered as a future glue solution dispensing technology in the semiconductor packaging industry.

More emphasis is placed on the controllability and operability of the size, frequency and precision of the generated liquid drops and particles compared with the semiconductor packaging glue solution distribution technology, and the spray atomization is used for producing metal liquid drops and particles with different size distributions on a large scale. Spray atomization metallurgy has become an important mainstay and a very promising industry in the electromechanical manufacturing process industry. Powder metallurgy materials are favored by the metal product manufacturing industry due to the advantages of energy saving, material saving, low cost of mass production, no need of machining, and the like, and technologies such as Thermal Spraying (TS), Metal Injection Molding (MIM), Metal Rapid Prototyping (MRP), Surface Mount Technology (SMT), and the like derived from the powder metallurgy materials are more vigorously developed.

Disclosure of Invention

The invention aims to provide an offset fluid nozzle which can realize complex and irregular spraying effect aiming at the simplification tendency of the prior spraying technology.

In order to achieve the purpose, the invention has the following conception:

the invention is an offset fluid nozzle having a central axis of rotation. The central rotating shaft is a rotating part, and the rotating speed can be adjusted by inputting torque upstream. All or part of the central rotating shaft can have movement along the axis, the movement is transmitted through the upstream or the crystal oscillator or the piezoelectric telescopic component is embedded in the partial section of the central rotating shaft, and the displacement movement of the front end of the central rotating shaft is controlled and adjusted. The offset fluid nozzle of the present invention has a rotating shaft head. The rotating shaft head and the offset nozzle main body section are connected or integrally manufactured at the front end of the central rotating shaft and move along with the central rotating shaft. The spindle head may be irregularly shaped, textured or threaded depending on the particular spray size, range, etc. desired.

The offset fluid nozzle of the present invention has an offset nozzle body section. The offset nozzle body segment is a housing structure that is typically secured to the upstream member with a gap between the upstream member and the central rotating shaft to facilitate fluid flow therethrough, wherein the gap is not necessarily uniform. The geometric center of the offset nozzle body segment does not necessarily coincide with the central axis of rotation.

The offset fluid nozzle of the present invention has an offset nozzle outlet section. The offset nozzle outlet section and the offset nozzle body section are connected or integrally manufactured at the forward end of the offset nozzle body section. The outlet section of the offset nozzle is positioned near the rotating shaft head, and the maximum position is higher or lower than the top end of the rotating shaft head. The outlet cross-sections of the outlet sections of the offset nozzles are not necessarily in the same flat cross-section, nor are they necessarily in uniform clearance with the rotating shaft head.

According to the inventive concept, the invention adopts the following scheme:

an offset fluid nozzle comprising a central spindle, a spindle head, an offset nozzle body section, and an offset nozzle outlet section; the front end of the central rotating shaft is connected with the rotating shaft head, and the front end of the offset nozzle main body section is connected with the offset nozzle outlet section; the central rotating shaft is inserted in the inner cavity of the nozzle main body section; fluid flows between the central rotating shaft and the rotating shaft head connecting body and the offset nozzle main body section and the offset nozzle outlet section connecting body under the action of upstream pressure, flows out in an offset manner at the offset nozzle outlet section, and controls the movement of the central rotating shaft under the action of surface tension and fluid flow, so that diversified, irregular, complex and controllable flow behaviors are realized.

Preferably, the central rotating shaft and the rotating shaft head control the movement of the central rotating shaft, and the central rotating shaft and the rotating shaft head are integrally manufactured or connected in other ways, and the method comprises the following steps: splicing, pin-jointing, welding or bolt-connecting; the central rotating shaft is of a central rotating structure, but the shape line or the generatrix of the central rotating shaft is a straight line or a curve, and the surfaces of the central rotating shaft and the rotating shaft head are smooth or have concave-convex textures.

Preferably, the central rotating shaft is capable of performing a fixed range of axial motion from an upstream input torque, either global or local, this motion being a telescopic motion, a periodic vibration or a displacement motion of a given waveform.

Preferably, the shape of the rotating shaft head is a cone, a frustum, a sphere-like shape or a non-revolution structural shape.

Preferably, the offset nozzle main body section and the offset nozzle outlet section are not necessarily revolution structures, and do not necessarily coincide with the geometric center of the cross section of the connecting body of the central rotating shaft and the rotating shaft head; the offset nozzle outlet section outlet cross-section does not necessarily have to be on a flat cross-section.

Preferably, the fluid is a solid particle flow, a liquid, a gas, a colloid or a mixed fluid of states or a solid-like or fluid-like body flowable under pressure, the constitutive relation of which is newtonian or non-newtonian.

Preferably, the offset nozzle combines the central rotary shaft, the rotary shaft head, the offset nozzle main body section, and the offset nozzle outlet section. With the gap in between passing the fluid.

Preferably, when the fluid passes through between the rotating shaft head and the offset nozzle outlet section, a stable liquid jet shape is formed through surface tension and fluid-solid action special behaviors, so that a complex but controllable jetting effect is obtained, and the diversification of jetting is realized.

Aiming at the design of the above two fields, the invention provides a thought which is completely opposite to the prior art. No matter the spray atomization metallurgy technology or the semiconductor packaging glue solution distribution technology, the requirement of the prior art on the regularity of the spray result is high. The size and behavior of liquid drops are strictly controlled according to the distribution requirement of the semiconductor packaging glue solution, and very high precision requirement is provided for the uniformity of the liquid drops; spray atomization metallurgy does not require a single size droplet, but the same demanding pursuit is made for the size distribution of droplets or particles. Strict pursuits are made on the design and parameter control of the nozzle and the working condition parameters. The invention overcomes the technical prejudice of the prior art, such as injection symmetry: since the workpieces are usually made geometrically irregular and lack symmetry, it is not necessary to provide adequate coverage, and it is necessary to make the jetting regular, for example, at the corner, the dots of the jetting cannot fill the corner. This can be achieved by irregular spraying. This is the starting point for the offset fluid nozzle of the present invention. The invention generates diversified spraying behaviors by designing the offset structure and the movement of the nozzle, and can be used as a supplement of the traditional process or a separate spraying process to adapt to the requirement of complex spraying.

Compared with the prior art, the invention has the following obvious and prominent substantive characteristics and remarkable advantages:

1. the invention has no coincident point with the design target of the existing nozzle basically, and is the result of reverse design;

2. the invention mainly utilizes the special interaction of fluid and solid to realize the controllable irregular jet injection effect and realize the complication and diversification of jet injection; can be used as a supplement to the prior art, or can be used as a separate injection process.

Drawings

Fig. 1 is a schematic structural view of an offset fluid nozzle device of a coaxial structure according to the present invention.

Fig. 2 is a schematic structural view of an offset fluid nozzle device of the non-coaxial structure of the present invention.

Fig. 3 is a schematic diagram of an offset fluid nozzle apparatus of the present invention having a dc high voltage power supply.

Detailed Description

The preferred embodiments of the present invention are described below with reference to the accompanying drawings:

the first embodiment is as follows:

referring to fig. 1 and 2, an offset fluid nozzle includes a central spindle 1, a spindle head 3, an offset nozzle body section 2, and an offset nozzle outlet section 4; the front end of the central rotating shaft 1 is connected with a rotating shaft head 3, and the front end of the offset nozzle main body section 2 is connected with an offset nozzle outlet section 4; the central rotating shaft 1 is inserted into the inner cavity of the nozzle main body section 2; fluid 5 flows through gaps between the connecting bodies of the central rotating shaft 1 and the rotating shaft head 3 and the connecting bodies of the offset nozzle main body section 2 and the offset nozzle outlet section 4 under the action of upstream pressure, and flows out in an offset manner from the offset nozzle outlet section 4, and the movement of the central rotating shaft 1 is controlled under the action of surface tension and fluid flow, so that diversified, irregular and complex but controllable flow behaviors are realized.

The offset fluid nozzle of the embodiment realizes and generates diversified spraying behaviors through irregular spraying, can be used as a supplement of the traditional process or a separate spraying process to meet the requirement of complex spraying, and can realize complex irregular spraying effect.

Example two:

this embodiment is substantially the same as the first embodiment, and is characterized in that:

the motion of central pivot is controlled to central pivot 1 and pivot head 3, adopts the integration to make or through other connected modes, includes: splicing, pin-jointing, welding or bolt-connecting; the central rotating shaft 1 is a central rotating structure, but the shape line or the generatrix is a straight line or a curve, and the surfaces of the central rotating shaft 1 and the rotating shaft head 3 are smooth or have concave-convex textures.

The central rotating shaft 1 can perform axial motion in a fixed range from an upstream input torque, the whole or local energy, and the motion is telescopic motion, periodic vibration or displacement motion with a given waveform.

The shape of the rotating shaft head 3 is a cone, a frustum, a sphere-like shape or a non-rotary structure shape.

The offset nozzle main body section 2 and the offset nozzle outlet section 4 are not necessarily of a rotary structure and do not necessarily coincide with the geometric center of the cross section of the connecting body of the central rotating shaft 1 and the rotating shaft head 3; the outlet cross-section of the offset nozzle outlet section 4 does not necessarily have to be a flat cross-section.

The fluid 5 is a solid particle flow, a liquid, a gas, a colloid or a mixed fluid of states or a solid-like or fluid-like body which can flow under pressure, and the constitutive relation of the fluid is Newtonian fluid or non-Newtonian fluid.

The embodiment can realize controllable irregular jet flow injection effect by utilizing the special interaction of fluid and solid, and realize the complication and diversification of jet flow injection; can be used as a supplement to the prior art, or can be used as a separate injection process.

Example three:

this embodiment is substantially the same as the above-described embodiment, and particularly:

referring to fig. 1, an offset fluid nozzle includes a central rotating shaft 1, a rotating shaft head 3, an offset nozzle main body section 2 and an offset nozzle outlet section 4, wherein the front end of the central rotating shaft 1 is connected with the rotating shaft head 3, and the front end of the offset nozzle main body section 2 is connected with the offset nozzle outlet section 4; and the fluid 5 circulates between the connectors of the central rotating shaft 1 and the rotating shaft head 3 and the connectors of the offset nozzle main body section 2 and the offset nozzle outlet section 4 under the action of upstream pressure and flows out in an offset manner from the offset nozzle outlet section 4, so that irregular and complex flowing behaviors are realized.

The axis of the central rotating shaft 1 has axis rotation and axis displacement telescopic motion or vibration.

The axis of the central rotating shaft 1 is coincident with the geometric center of the offset nozzle main body section 2.

The rotating shaft head 3 is in an ellipsoid-like crown shape.

The outlet end profile of the offset nozzle outlet section 4 is in a chamfer plane.

The embodiment utilizes the interaction of fluid and solid to control the movement of the central rotating shaft, and can realize the flow of irregular complex controllable jet flow. The device can be applied to the spraying processes of powder metallurgy, ink jet, spraying, glue spraying, welding, printing, rapid forming and the like, generates complex spraying fluid behaviors by utilizing the irregular flowing characteristic of the nozzle, diversifies the spraying effect, can be used as the supplement of the traditional spraying, and can also form an independent spraying process.

Example four:

this embodiment is substantially the same as the above-described embodiment, and particularly:

referring to fig. 1 and 2, the central spindle 1 axis and the geometric center of the offset nozzle body segment 2 are not coincident.

The spindle head 3 is of a needle point type.

The embodiment utilizes the special interaction of fluid and solid to realize controllable irregular jet injection effect and realize the complication and diversification of jet injection.

Example five:

this embodiment is substantially the same as the above-described embodiment, and particularly:

referring to fig. 1 and 3, the target of fluid ejection of the offset fluid nozzle is the substrate 6. A dc high voltage power supply 7 is present between the offset fluid nozzle and the substrate 6 to increase the directional directionality of the ejected fluid 5 or to assist in the generation of a diverging jet. The special interaction of fluid and solid is utilized to realize the controllable irregular jet injection effect and realize the complication and diversification of jet injection; can be used as a supplement to the prior art, or can be used as a separate injection process.

In summary, the front end of the central rotating shaft of the offset fluid nozzle is connected to the rotating shaft head, the front end of the offset nozzle main body section is connected to the offset nozzle outlet section, and the central rotating shaft is inserted into the inner cavity of the nozzle main body section. Fluid circulates between the central rotating shaft and the rotating shaft head connecting body and between the offset nozzle main body section and the offset nozzle outlet section connecting body under the action of upstream pressure and flows out in an offset manner at the offset nozzle outlet section, and the movement of the central rotating shaft is controlled by the interaction of the fluid and solid, so that irregular complex controllable jet flow can be realized. The device of the embodiment can be applied to spraying processes such as powder metallurgy, ink jetting, spraying, glue spraying, welding, printing, rapid forming and the like, generates complex spraying fluid behaviors by utilizing the irregular flowing characteristic of the nozzle, diversifies the spraying effect, can be used as a supplement of the traditional spraying, and can also form an independent spraying process.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the embodiments, and various changes and modifications can be made according to the purpose of the invention, and any changes, modifications, substitutions, combinations or simplifications made according to the spirit and principle of the technical solution of the present invention shall be equivalent substitutions, as long as the purpose of the present invention is met, and the present invention shall fall within the protection scope of the present invention without departing from the technical principle and inventive concept of the present invention.