CN110899060B - Hot melt screw dispensing valve and dispensing equipment with same - Google Patents
Hot melt screw dispensing valve and dispensing equipment with same Download PDFInfo
- Publication number
- CN110899060B CN110899060B CN201911266965.4A CN201911266965A CN110899060B CN 110899060 B CN110899060 B CN 110899060B CN 201911266965 A CN201911266965 A CN 201911266965A CN 110899060 B CN110899060 B CN 110899060B
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- China
- Prior art keywords
- glue
- thimble
- screw
- dispensing
- hole
- Prior art date
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Links
- 239000012943 hotmelt Substances 0.000 title claims abstract description 23
- 239000003292 glue Substances 0.000 claims abstract description 187
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000002844 melting Methods 0.000 claims abstract description 15
- 230000008018 melting Effects 0.000 claims abstract description 14
- 238000004891 communication Methods 0.000 claims description 29
- 238000007789 sealing Methods 0.000 claims description 27
- 239000000084 colloidal system Substances 0.000 claims description 17
- 238000005485 electric heating Methods 0.000 claims description 13
- 238000003825 pressing Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 abstract description 14
- 230000001070 adhesive effect Effects 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 11
- 239000000463 material Substances 0.000 description 12
- 239000012530 fluid Substances 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004831 Hot glue Substances 0.000 description 1
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920002530 polyetherether ketone Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/001—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work incorporating means for heating or cooling the liquid or other fluent material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
- B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
Landscapes
- Coating Apparatus (AREA)
Abstract
The invention discloses a hot-melt screw dispensing valve and dispensing equipment with the same, wherein the hot-melt screw dispensing valve comprises a screw pump, a dispensing needle head and a closing mechanism, the screw pump comprises a screw, a valve body and a driving motor, and the screw is arranged in the valve body and defines a spiral glue feeding channel with the valve body; the valve body is provided with a glue inlet hole and a glue outlet hole, the glue inlet hole is communicated with the upper end of the spiral glue feeding channel, and the glue outlet hole is communicated with the lower end of the spiral glue feeding channel; the driving motor is connected with the screw rod to drive the screw rod to rotate; the dispensing needle head is arranged on the valve body and is communicated with the dispensing hole; the glue closing mechanism is arranged on the valve body and used for controlling the switch of the glue outlet so as to enable the spiral glue feeding channel to be communicated or blocked with the glue dispensing needle head. According to the hot melting screw dispensing valve provided by the embodiment of the invention, the glue closing control can be realized, and the hot melting screw dispensing valve can be applied to low-viscosity glue. In addition, the adhesive closing effect can be kept good for a long time, and the performance is reliable and stable.
Description
Technical Field
The invention relates to a dispensing valve, in particular to a hot-melting screw dispensing valve and dispensing equipment with the same.
Background
The dispensing machine is also called a glue spreader, a glue dropping machine, a glue beating machine and the like, and is an automatic machine which is specially used for controlling fluid and dropping or coating the fluid on the surface of a product or in the product. In industrial production, numerous products require dispensing by a dispenser, such as integrated circuits, printed circuit boards, display screens, and electronic components. Dispensing valves are extremely important components in dispensing machines that push the glue to flow and drop or coat the product surface from the dispensing needle. The dispensing valve is one of various types, and the screw dispensing valve is powered by a screw pump to push the glue to be discharged.
The screw dispensing valve in the related art generally comprises a screw pump, wherein the screw pump is composed of a valve body, a screw, a motor and the like, the valve body is provided with a through hole, the screw is arranged in the through hole, a screw glue feeding channel is defined between the outer wall of the screw and the inner wall of the through hole, the motor drives the screw to rotate, so that glue in the screw glue feeding channel is downwards conveyed, however, when the screw does not rotate, a gap exists between the outer wall of the screw and the inner wall of the through hole, and when the viscosity of the glue is lower, the glue can leak downwards from the gap, therefore, the dispensing valve cannot be suitable for glue with lower viscosity, but can only be used for glue with larger viscosity.
In order to realize the sealing of the gap, a bushing made of a soft rubber material is sleeved outside the screw, the inner diameter of the bushing is smaller than the outer diameter of the screw, and the screw is sealed by utilizing the compressibility of the soft rubber. In addition, the lining made of the soft rubber material is worn and increased after long-time use, the tightness is reduced, and the leakage of rubber is difficult to avoid.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems in the related art to some extent. To this end, an object of the present invention is to propose a hot melt screw dispensing valve.
Another object of the present invention is to provide a dispensing apparatus.
In order to achieve the above object, in one aspect, a hot melt screw dispensing valve according to an embodiment of the present invention includes:
The screw pump comprises a screw, a valve body and a driving motor, wherein the screw is arranged in the valve body and a spiral glue feeding channel is defined between the screw and the valve body; the valve body is provided with a glue inlet hole and a glue outlet hole, the glue inlet hole is communicated with the upper end of the spiral glue feeding channel, and the glue outlet hole is communicated with the lower end of the spiral glue feeding channel; the driving motor is connected with the screw rod to drive the screw rod to rotate;
The dispensing needle head is arranged on the valve body and is communicated with the glue outlet hole;
and the glue closing mechanism is arranged on the valve body and used for controlling the switch of the glue outlet so as to enable the spiral glue feeding channel to be communicated with or blocked from the glue dispensing needle head.
According to the hot melt screw dispensing valve provided by the embodiment of the invention, the switch of the dispensing hole is controlled by arranging the adhesive closing mechanism, so that the spiral adhesive feeding channel is communicated or blocked with the dispensing needle, the adhesive closing control can be realized, and the hot melt adhesive valve can be ensured to be suitable for low-viscosity glue. In addition, the adhesive closing effect can be kept good for a long time, and the performance is reliable and stable.
In addition, the hot melt screw dispensing valve according to the above embodiment of the present invention may further have the following additional technical features:
According to one embodiment of the present invention, further comprising:
And the hot melting device is suitable for heating the charging barrel so as to melt the colloid in the charging barrel, and is communicated with the glue inlet so as to enable the melted colloid to enter the spiral glue feeding channel through the glue inlet.
According to one embodiment of the present invention, the adhesive closing mechanism includes:
The thimble is arranged on the valve body in a sliding manner between a first position and a second position, when the thimble is positioned at the first position, the thimble closes the glue outlet so as to block the spiral glue feeding channel from the glue dispensing needle head, and when the thimble is positioned at the second position, the thimble opens the glue outlet, and the spiral glue feeding channel is communicated with the glue dispensing needle head;
The driving device is connected with the thimble and used for driving the thimble to move between the first position and the second position.
According to one embodiment of the invention, the diameter of the thimble is larger than or equal to the diameter of the glue outlet hole;
The axis of thimble with the axis of play gluey hole is perpendicular, be equipped with communication structure on the thimble, when the thimble is located the second position, communication structure with go out gluey hole relatively, so that spiral send gluey passageway with the point gum syringe needle intercommunication, when the thimble is located the first position, communication structure with go out gluey hole dislocation, so that spiral send gluey passageway with the point gum syringe needle blocks.
According to one embodiment of the invention, the communication structure is a hole or a slot.
According to one embodiment of the invention, when the communication structure is a hole, the axis of the hole is parallel to or coincident with the glue outlet hole; when the communication structure is a groove, the groove is formed into an annular groove surrounding the outer peripheral surface of the ejector pin.
According to one embodiment of the invention, the valve body is provided with a top pinhole, and the axis of the top pinhole is perpendicularly intersected with the axis of the glue outlet hole;
A first reaming is arranged at one end of the jacking needle hole, a first step surface is formed between the first reaming and the jacking needle hole, a first sealing ring and a first thread pressing ring are arranged in the first reaming, the first thread pressing ring is in threaded fit with the first reaming, and the first sealing ring is pressed and attached to the first step surface;
the other end of the top pinhole is provided with a second reaming, a second step surface is formed between the second reaming and the top pinhole, a second sealing ring and a second thread pressing ring are arranged in the second reaming, the second thread pressing ring is in threaded fit with the second reaming, and the second sealing ring is pressed and attached to the second step surface;
The thimble is penetrated in the thimble hole and sequentially penetrates through the first threaded compression ring, the first sealing ring, the glue outlet hole, the second sealing ring and the second threaded compression ring, and the first sealing ring and the second sealing ring are respectively sealed with the thimble.
According to one embodiment of the invention, the valve body has a piston chamber thereon, and the driving device includes:
The piston is slidably arranged in the piston cavity and divides the piston cavity into a first cavity and a second cavity, the first cavity is provided with an air inlet, and the second cavity is provided with an air outlet;
The thimble is connected with the piston, and when the air inlet is in air, the piston moves along a first direction so that the thimble moves to the second position;
The elastic piece is arranged in the second cavity and is used for providing elastic acting force to push the piston to move along a second direction, so that the thimble moves to the first position, and the second direction is opposite to the first direction.
According to one embodiment of the present invention, the hot-melt apparatus includes:
The heat conduction cylinder is provided with a glue discharge port, and the glue discharge port is communicated with the glue inlet;
The electric heating sheet is wrapped on the outer peripheral surface of the heat conduction cylinder;
the heat insulation cylinder is sleeved outside the electric heating sheet.
On the other hand, the dispensing device provided by the embodiment of the invention is provided with the hot melting screw dispensing valve.
According to the dispensing equipment provided by the embodiment of the invention, the hot melting screw dispensing valve is arranged, so that the glue closing control can be realized, and the hot melting point dispensing valve is ensured to be suitable for low-viscosity glue. In addition, the adhesive closing effect can be kept good for a long time, and the performance is reliable and stable.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a hot melt screw dispensing valve according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a hot melt screw dispensing valve in accordance with an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is an enlarged view of a portion of fig. 2 as the screw slides to a first position.
Reference numerals:
A screw pump 10;
a valve body 101;
A screw 102;
a drive motor 103;
A spiral glue feeding channel H10;
a glue inlet H101;
a glue outlet H102;
a bushing 104;
Dispensing needle 20;
A glue closing mechanism 30;
Thimble 301;
A slot 3011;
A driving device 302;
A piston 3021;
a resilient member 3022;
A first cavity P10;
a second cavity P11;
An exhaust port H11;
a first seal ring 303;
A first threaded collar 304;
A second seal ring 305;
a second threaded collar 306.
A hot melt device 40;
A heat conductive cylinder 401;
an electric heating plate 402;
A heat insulating cylinder 403;
An air inlet 404;
And a glue outlet 405.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below are exemplary and intended to illustrate the present invention and should not be construed as limiting the invention, and all other embodiments, based on the embodiments of the present invention, which may be obtained by persons of ordinary skill in the art without inventive effort, are within the scope of the present invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplify the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
The hot melt screw dispensing valve according to the embodiment of the present invention is described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 4, a hot melt screw dispensing valve according to an embodiment of the present invention includes a screw pump 10, a dispensing needle 20, and a closing mechanism 30.
Specifically, the screw pump 10 includes a screw 102, a valve body 101, and a driving motor 103, where the screw 102 is disposed in the valve body 101 and defines a screw feeding channel H10 with the valve body 101. The valve body 101 is provided with a glue inlet H101 and a glue outlet H102, the glue inlet H101 is communicated with the upper end of the spiral glue feeding channel H10, and the glue outlet H102 is communicated with the lower end of the spiral glue feeding channel H10. The driving motor 103 is connected to the screw 102 to drive the screw 102 to rotate.
That is, the glue inlet H101 and the glue outlet H102 are both communicated with the spiral feeding channel, and when the hot-melted glue enters the glue inlet H101 at a certain pressure, the glue can flow into the spiral feeding channel H10 through the glue inlet H101. When the driving motor 103 drives the screw 102 to rotate, the screw 102 is rotated, and the colloid in the spiral colloid conveying channel H10 is conveyed downwards by utilizing the spiral motion of the screw 102, and finally, the colloid can be conveyed out from the colloid outlet hole H102.
It will be appreciated that a through hole may be provided in the valve body 101, and the screw 102 may be inserted directly into the through hole, so that a spiral glue feeding channel H10 is defined between the outer peripheral wall of the screw 102 and the inner wall of the through hole. In addition, a bushing 104 may be fixedly disposed in the through hole, and the bushing 104 may be made of a hard material, such as copper, iron, stainless steel, or other alloy, and the screw 102 is inserted into the through hole, so that a spiral glue feeding channel H10 is defined between the outer peripheral wall of the screw 102 and the inner peripheral wall of the bushing 104 (as shown in fig. 2).
The dispensing needle 20 is disposed on the valve body 101 and is communicated with the dispensing hole H102. The glue closing mechanism 30 is disposed on the valve body 101, and is used for controlling the opening and closing of the glue outlet H102, so that the spiral glue feeding channel H10 is communicated with or blocked from the glue dispensing needle 20.
That is, the glue outlet H102 is located between the lower end of the spiral glue feeding channel H10 and the dispensing needle 20, and is used for communicating the spiral glue feeding channel H10 with the dispensing needle 20, and the glue closing mechanism 30 can control the opening or closing of the glue outlet H102, when the glue closing mechanism 30 opens the glue outlet H102, the spiral glue feeding channel is communicated with the dispensing needle 20, and the glue fed in the spiral glue feeding channel H10 can flow into the dispensing needle 20 through the glue outlet H102, and then drop or spray onto the surface to be dispensed of the product through the dispensing needle 20. When the glue outlet hole H102 is closed by the glue closing mechanism 30, the spiral feeding through is blocked from the glue dispensing needle 20, and the glue in the spiral glue feeding channel H10 cannot enter the glue dispensing needle 20, so that glue closing can be realized.
According to the hot melt screw dispensing valve provided by the embodiment of the invention, the switch of the glue outlet H102 is controlled by arranging the glue closing mechanism 30, so that the spiral glue feeding channel H10 is communicated or blocked with the glue dispensing needle head 20, the glue closing control can be realized, and the hot melt screw dispensing valve is ensured to be suitable for low-viscosity glue. In addition, the adhesive closing effect can be kept good for a long time, and the performance is reliable and stable.
Referring to fig. 1 and 2, in some embodiments of the present invention, a hot melting device 40 is further included, and is adapted to heat the cartridge to melt the glue in the cartridge, where the hot melting device 40 is in communication with the glue inlet, so that the melted glue enters the spiral glue channel H10 through the glue inlet.
That is, the hot melting device 40 can heat the material cylinder, so that the colloid in the material cylinder is melted to form the colloid in a fluid state after being heated, and the colloid in the fluid state can flow into the spiral glue feeding channel H10 through the glue inlet under the action of air pressure, so that the colloid is conveniently heated by the hot melting device 40 in the embodiment, and is easily conveyed to the spiral glue feeding channel H10 after being melted.
Referring to fig. 2 to 4, in one embodiment of the present invention, the adhesive closing mechanism 30 includes an ejector pin 301 and a driving device 302, wherein the ejector pin 301 is slidably disposed on the valve body 101 between a first position and a second position, when the ejector pin 301 is located in the first position, the ejector pin 301 closes the adhesive outlet hole H102, so that the spiral adhesive feeding channel H10 is blocked from the dispensing needle 20, and when the ejector pin 301 is located in the second position, the ejector pin 301 opens the adhesive outlet hole H102, and the spiral adhesive feeding channel H10 is communicated with the dispensing needle 20.
A drive device 302 is coupled to the needle 301 for driving the needle 301 between the first position and the second position.
That is, in this embodiment, the ejector pin 301 is slidably disposed in the valve body 101, and the driving device 302 drives the ejector pin 301 to switch between the first position and the second position to control the opening and closing of the glue outlet H102, so as to realize the on-off control between the spiral glue feeding channel H10 and the dispensing needle 20. Specifically, when the ejector pin 301 is located at the first position, the ejector pin 301 closes the glue outlet H102, for example, the ejector pin 301 extends into the glue outlet H102, so that the glue outlet H102 is plugged and closed, and when the ejector pin 301 is located at the second position, the ejector pin 301 opens the glue outlet H102, for example, the ejector pin 301 exits the glue outlet H102, so that the glue outlet H102 is opened, and thus, through switching of the ejector pin 301 between the first position and the second position, the glue outlet H102 can be controlled to be opened or closed.
Referring to fig. 3 to 4, in an example of the present invention, in order to realize that the ejector pin 301 controls the opening or closing of the glue outlet H102, the diameter of the ejector pin 301 is greater than or equal to the diameter of the glue outlet H102. The axis of thimble 301 is perpendicular with the axis of play gluey hole H102, be equipped with communication structure on the thimble 301, when thimble 301 is located the second position, communication structure with play gluey hole H102 is relative, so that spiral send gluey passageway H10 with point gum syringe needle 20 communicates, when thimble 301 is located the first position, communication structure with play gluey hole H102 dislocation makes spiral send gluey passageway H10 with point gum syringe needle 20 blocks.
That is, in this embodiment, the ejector 301 is provided with a communication structure, when the ejector 301 is located at the first position, the communication structure is dislocated from the glue outlet H102, and at this time, since the diameter of the ejector 301 is greater than or equal to the diameter of the glue outlet H102, the ejector 301 vertically passes through the glue outlet H102, so that the ejector 301 can completely block the glue outlet H102, the glue outlet H102 is closed, and the spiral glue feeding channel H10 is blocked from the dispensing needle 20. When the ejector 301 is located at the second position, the communication structure is opposite to the glue outlet H102, and at this time, the spiral glue feeding channel H10 can be communicated with the dispensing needle 20 through the communication structure.
Therefore, in this embodiment, the diameter of the ejector pin 301 is configured to be greater than or equal to the diameter of the glue outlet hole H102, and the ejector pin 301 is provided with the communication structure, so that the ejector pin 301 can be switched between the first position and the second position, and the glue outlet hole H102 is opposite to or dislocated from the communication structure, so that the glue outlet hole H102 is opened or closed.
Alternatively, the communication structure may be a hole or a slot 3011, and the spiral glue channel H10 is communicated with the dispensing needle 20 by the hole or the slot 3011 when the hole or the slot 3011 is in the second position.
Advantageously, when the communication structure is a hole, the axis of the hole is parallel to or coincides with the glue outlet hole H102, so that it is ensured that glue can flow into the glue dispensing needle 20 through the hole more quickly, and the glue outlet effect is improved. When the communication structure is the groove 3011, the groove 3011 is formed as an annular groove surrounding the outer circumferential surface of the ejector pin 301, and the annular groove has a larger flow cross section, so that the glue can flow into the dispensing needle 20 through the hole more quickly, the glue outlet effect is improved, in addition, the annular groove is convenient to process, and the stress uniformity of the ejector pin 301 is ensured.
Referring to fig. 3 to 4, in one embodiment of the present invention, a top pinhole is provided on the valve body 101, and an axis of the top pinhole perpendicularly intersects with an axis of the glue outlet H102.
One end of the top pinhole is provided with a first reaming, a first step surface is formed between the first reaming and the top pinhole, a first sealing ring 303 and a first thread pressing ring 304 are arranged in the first reaming, the first thread pressing ring 304 is in threaded fit with the first reaming, and the first sealing ring 303 is tightly attached to the first step surface.
The other end of the top pinhole is provided with a second reaming, a second step surface is formed between the second reaming and the top pinhole, a second sealing ring 305 and a second thread pressing ring 306 are arranged in the second reaming, the second thread pressing ring 306 is in threaded fit with the second reaming, and the second sealing ring 305 is tightly pressed and attached to the second step surface.
Thimble 301 is worn to establish in the thimble hole, and pass in proper order first screw thread clamping ring 304, first sealing ring 303, play gluey hole H102, second sealing ring 305 and second screw thread clamping ring 306, first sealing ring 303 and second sealing ring 305 respectively with thimble 301 seals.
That is, in this embodiment, the first reaming and the second reaming are respectively disposed at two ends of the top pinhole, and the diameters of the first reaming and the second reaming are both greater than that of the top pinhole, so that a first step surface is formed between the first reaming and one end of the top pinhole, and a second step surface is formed between the second reaming and the other end of the top pinhole. The first counterbore is provided with a first seal ring 303 and a first screw press ring 304, the first seal ring 303 is pressed on the first step surface by the first screw press ring 304, the second counterbore is provided with a second seal ring 305 and a second screw press ring 306, and the second seal ring 305 is pressed on the second step surface by the second screw press ring 306. After the thimble 301 penetrates into the thimble hole, the first seal ring 303, the second seal ring 305 are tightly attached to the outer peripheral surface of the thimble 301 to form a seal.
Therefore, the gap between the thimble 301 and the thimble hole is sealed by the first sealing ring 303 and the second sealing ring 305, so that the glue of the glue outlet hole H102 cannot leak from the gap between the thimble 301 and the thimble hole, and the glue dispensing valve is ensured not to leak, and the performance is more reliable. In addition, the first seal ring 303 is pressed by the first threaded press ring 304, and the second seal ring 305 is pressed by the second threaded press ring 306, so that the unreliable problem caused by the movement of the first seal ring 303 and the second seal ring 305 along with the movement of the thimble 301 can be prevented.
Referring to fig. 3 to 4, in some embodiments of the present invention, the valve body 101 has a piston cavity, the driving device 302 includes a piston 3021 and an elastic member 3022, the piston 3021 is slidably disposed in the piston cavity and divides the piston cavity into a first cavity P10 and a second cavity P11, the first cavity P10 has an air inlet 404, and the second cavity P11 has an air outlet H11.
Ejector pin 301 is coupled to piston 3021. When intake port 404 is engaged, piston 3021 is moved in a first direction to move ejector pin 301 to the second position.
An elastic member 3022 is disposed in the second cavity P11 to provide an elastic force to push the piston 3021 to move along a second direction, so that the ejector pin 301 moves to the first position, and the second direction is opposite to the first direction.
That is, the piston 3021 may slide in the piston cavity, the ejector pin 301 is connected to the piston 3021, the air inlet 404 may be connected to an external air source device, the air source device provides positive pressure air, the air enters the first cavity P10 to push the piston 3021 to move along the first direction, at this time, the piston 3021 drives the ejector pin 301 to move, so that the ejector pin 301 moves to the second position, the communication structure is opposite to the glue outlet hole H102, and the spiral glue feeding channel H10 may be communicated with the glue dispensing needle 20 through the communication structure. Because the volume of the second cavity P11 is gradually reduced when the piston 3021 moves along the first direction, so that the elastic member 3022 is compressed, when ventilation is stopped, the elastic member 3022 is deformed and stretched, and then the piston 3021 is pushed to move along the second direction under the action of the elastic member 3022, at this time, the piston 3021 drives the ejector pin 301 to move, so that the ejector pin 301 is restored to the first position, the communication structure is misplaced with the glue outlet hole H102, and the spiral glue feeding channel H10 is blocked from the dispensing needle 20.
In this embodiment, the piston 3021 drives the ejector pin 301 to move, which has a simple structure, and the ejector pin 301 moves reliably, so that reliable switching between the first position and the second position can be achieved, and reliable on-off control between the spiral glue feeding channel H10 and the dispensing needle 20 is ensured.
In one embodiment of the present invention, the hot melting device 40 includes a heat conduction cylinder 401, an electric heating plate 402 and a heat insulation cylinder 403, wherein the heat conduction cylinder 401 has a glue outlet 405, and the glue outlet 405 is communicated with the glue inlet; the electric heating plate 402 is wrapped on the outer peripheral surface of the heat conduction cylinder 401; a heat insulating cylinder 403 is sleeved outside the electric heating plate 402.
Wherein, the heat conduction cylinder 401 can hold the feed cylinder, can pack into the colloid in the feed cylinder to, can set up the lid at heat conduction cylinder 401 top, set up the air pipe joint on the lid, utilize the air pipe joint to ventilate in to the feed cylinder. The electric heating plate 402 is wrapped outside the heat conduction cylinder 401, so that the heat conduction cylinder 401 can be uniformly heated, and heat is conducted to the material cylinder through the heat conduction cylinder 401, so that colloid in the material cylinder is melted after being heated. The heat insulation cylinder 403 is sleeved outside the electric heating plate 402, so that the heat insulation and preservation effect can be achieved, heat is prevented from being conducted to the outside atmosphere, on one hand, the heat preservation effect can be achieved, heat loss caused by heat conducted to the atmosphere is avoided, on the other hand, the heat insulation and protection effect is achieved, and the heat conduction cylinder 401 is prevented from being contacted to cause dangers such as scalding.
It is understood that the heat conductive tube 401 is generally made of a metal material with better heat conductivity, such as an aluminum alloy material, a stainless steel material, etc., so that a good heat conduction effect can be achieved. The electric heating plate 402 can adopt a silica gel electric heating plate 402 and the like, and the silica gel electric heating plate 402 has good wrapping property on the heat conduction cylinder 401, so that the heat conduction cylinder 401 is heated uniformly and heat conduction is faster. The insulating cylinder 403 may be made of an insulating, high temperature resistant plastic material, such as PEEK plastic material.
The dispensing device provided by the embodiment of the invention is provided with the hot melt screw dispensing valve.
According to the dispensing equipment provided by the embodiment of the invention, the hot melting screw dispensing valve is arranged, so that the glue closing control can be realized, and the hot melting point dispensing valve is ensured to be suitable for low-viscosity glue. In addition, the adhesive closing effect can be kept good for a long time, and the performance is reliable and stable.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (5)
1. A hot melt screw dispensing valve, comprising:
The screw pump comprises a screw, a valve body and a driving motor, wherein the screw is arranged in the valve body and a spiral glue feeding channel is defined between the screw and the valve body; the valve body is provided with a glue inlet hole and a glue outlet hole, the glue inlet hole is communicated with the upper end of the spiral glue feeding channel, and the glue outlet hole is communicated with the lower end of the spiral glue feeding channel; the driving motor is connected with the screw rod to drive the screw rod to rotate;
The dispensing needle head is arranged on the valve body and is communicated with the glue outlet hole;
the glue closing mechanism is arranged on the valve body and used for controlling the switch of the glue outlet so as to enable the spiral glue feeding channel to be communicated or blocked with the glue dispensing needle head;
The hot melting device is suitable for heating the charging barrel so as to melt the colloid in the charging barrel, and is communicated with the colloid inlet so as to enable the melted colloid to enter the spiral colloid conveying channel through the colloid inlet;
The glue closing mechanism comprises a thimble and a driving device, wherein the thimble is slidably arranged on the valve body between a first position and a second position, when the thimble is positioned at the first position, the thimble closes the glue outlet so as to block the spiral glue feeding channel from the glue dispensing needle head, and when the thimble is positioned at the second position, the thimble opens the glue outlet, and the spiral glue feeding channel is communicated with the glue dispensing needle head; the driving device is connected with the thimble and used for driving the thimble to move between the first position and the second position;
The diameter of the thimble is larger than or equal to the diameter of the glue outlet hole; the axis of the thimble is vertical to the axis of the glue outlet hole, a communication structure is arranged on the thimble, when the thimble is positioned at the second position, the communication structure is opposite to the glue outlet hole so as to enable the spiral glue feeding channel to be communicated with the glue dispensing needle head, and when the thimble is positioned at the first position, the communication structure is staggered with the glue outlet hole so as to enable the spiral glue feeding channel to be blocked with the glue dispensing needle head;
The valve body is provided with a top pinhole, and the axis of the top pinhole is vertically intersected with the axis of the glue outlet hole; a first reaming is arranged at one end of the jacking needle hole, a first step surface is formed between the first reaming and the jacking needle hole, a first sealing ring and a first thread pressing ring are arranged in the first reaming, the first thread pressing ring is in threaded fit with the first reaming, and the first sealing ring is pressed and attached to the first step surface;
the other end of the top pinhole is provided with a second reaming, a second step surface is formed between the second reaming and the top pinhole, a second sealing ring and a second thread pressing ring are arranged in the second reaming, the second thread pressing ring is in threaded fit with the second reaming, and the second sealing ring is pressed and attached to the second step surface;
The thimble penetrates through the thimble hole and sequentially passes through the first threaded compression ring, the first sealing ring, the glue outlet hole, the second sealing ring and the second threaded compression ring, and the first sealing ring and the second sealing ring are respectively sealed with the thimble;
the valve body is provided with a piston cavity, the driving device comprises a piston and an elastic piece, the piston is slidably arranged in the piston cavity and divides the piston cavity into a first cavity and a second cavity, the first cavity is provided with an air inlet, and the second cavity is provided with an air outlet;
The thimble is connected with the piston, and when the air inlet is in air, the piston moves along a first direction so that the thimble moves to the second position;
the elastic piece is arranged in the second cavity and is used for providing elastic acting force to push the piston to move along a second direction, so that the thimble moves to the first position, and the second direction is opposite to the first direction.
2. The hot melt screw dispensing valve of claim 1 wherein said communication structure is a hole or a slot.
3. The hot melt screw dispensing valve of claim 2 wherein when said communication structure is a hole, the axis of said hole is parallel or coincident with said dispensing hole; when the communication structure is a groove, the groove is formed into an annular groove surrounding the outer peripheral surface of the ejector pin.
4. The hot melt screw dispensing valve of claim 1, wherein the hot melt apparatus comprises:
The heat conduction cylinder is provided with a glue discharge port, and the glue discharge port is communicated with the glue inlet;
The electric heating sheet is wrapped on the outer peripheral surface of the heat conduction cylinder;
the heat insulation cylinder is sleeved outside the electric heating sheet.
5. A dispensing apparatus having a hot melt screw dispensing valve as claimed in any one of claims 1 to 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911266965.4A CN110899060B (en) | 2019-12-11 | 2019-12-11 | Hot melt screw dispensing valve and dispensing equipment with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911266965.4A CN110899060B (en) | 2019-12-11 | 2019-12-11 | Hot melt screw dispensing valve and dispensing equipment with same |
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| CN110899060A CN110899060A (en) | 2020-03-24 |
| CN110899060B true CN110899060B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911266965.4A Active CN110899060B (en) | 2019-12-11 | 2019-12-11 | Hot melt screw dispensing valve and dispensing equipment with same |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115318551B (en) * | 2021-05-11 | 2024-03-29 | 三赢科技（深圳）有限公司 | Adhesive dispensing device |
| CN113976396A (en) * | 2021-09-23 | 2022-01-28 | 深圳市特瑞吉科技有限公司 | Hot melt adhesive goes out mucilage binding and puts |
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| CN110899060A (en) | 2020-03-24 |
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