CN110899060A - 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
- CN110899060A CN110899060A CN201911266965.4A CN201911266965A CN110899060A CN 110899060 A CN110899060 A CN 110899060A CN 201911266965 A CN201911266965 A CN 201911266965A CN 110899060 A CN110899060 A CN 110899060A
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- Prior art keywords
- glue
- hole
- thimble
- screw
- dispensing
- Prior art date
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- 239000012943 hotmelt Substances 0.000 title claims abstract description 34
- 239000003292 glue Substances 0.000 claims abstract description 192
- 230000007246 mechanism Effects 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 36
- 239000000084 colloidal system Substances 0.000 claims description 17
- 238000002844 melting Methods 0.000 claims description 12
- 230000008018 melting Effects 0.000 claims description 10
- 238000003825 pressing Methods 0.000 claims description 10
- 238000005485 electric heating Methods 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 9
- 239000000463 material Substances 0.000 description 9
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 5
- 235000017491 Bambusa tulda Nutrition 0.000 description 5
- 241001330002 Bambuseae Species 0.000 description 5
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 5
- 239000011425 bamboo Substances 0.000 description 5
- 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
- 239000000956 alloy Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000007769 metal material 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
- 239000004696 Poly ether ether ketone Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 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
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- -1 e.g. Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 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
Images
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 dispensing mechanism, the screw pump comprises a screw, a valve body and a driving motor, and a spiral glue feeding channel is defined between the screw and the valve body and is arranged in the valve body; 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 glue dispensing needle head is arranged on the valve body and communicated with the glue outlet hole; the glue closing mechanism is arranged on the valve body and used for controlling the opening and closing of the glue outlet hole 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 glue closing control can be realized, and the hot-melt screw dispensing valve is ensured to be suitable for glue with low viscosity. In addition, the good glue closing effect can be kept 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 dispenser is also called a glue spreader, a glue dispenser, a glue spreader and the like, and is an automatic machine which is specially used for controlling fluid and dripping or coating the fluid on the surface of a product or in the product. In industrial production, a plurality of products, such as integrated circuits, printed circuit boards, display screens, and electronic components, need to be dispensed by a dispenser. The dispensing valve is an important part in the dispensing machine, and is used for pushing the glue to flow and dripping or coating the glue on the surface of a product from a dispensing needle. The dispensing valve has various different types, the screw dispensing valve is one of the dispensing valves, and the screw dispensing valve utilizes the screw pump to provide power to push the glue to be discharged.
The screw dispensing valve in the related art, generally include the screw pump, the screw pump is by the valve body, screw rod and motor etc. constitute, the valve body is equipped with the through-hole, the screw rod is established in the through-hole, inject the spiral between the outer wall of screw rod and the inner wall of through-hole and send gluey passageway, motor drive screw rod is rotatory, make the glue in the spiral send gluey passageway to carry downwards, however, the screw rod is when the irrotational, there is the clearance between the outer wall of screw rod and the inner wall of through-hole, when the viscosity of colloid is lower, the colloid can be followed downward seepage in this clearance, consequently, this kind of dispensing valve can not be applicable to the lower glue of viscosity, but can only be used for the great.
In order to realize the sealing of the gap, a liner made of a soft rubber material is sleeved outside the screw rod in the industry, the inner diameter of the liner is smaller than the outer diameter of the screw rod, and the screw rod is sealed by utilizing the compressibility of the soft rubber. In addition, after the bushing made of the soft rubber is used for a long time, the abrasion is aggravated, the sealing performance is reduced, and the rubber leakage is difficult to avoid.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. To this end, an object of the present invention is to provide a hot melt screw dispensing valve.
Another objective of the present invention is to provide a dispensing apparatus.
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, and the screw is arranged in the valve body and defines a spiral glue feeding channel with the valve body; 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 communicated with the glue outlet hole;
and the glue closing mechanism is arranged on the valve body and used for controlling the opening and closing of the glue outlet hole so as to enable the spiral glue feeding channel to be communicated with or blocked by the glue dispensing needle head.
According to the hot-melt screw dispensing valve provided by the embodiment of the invention, the opening and closing of the glue outlet hole are controlled by the glue closing mechanism, so that the spiral glue feeding channel is communicated with or blocked by the glue dispensing needle head, the glue closing control can be realized, and the hot-melt screw dispensing valve is ensured to be suitable for glue with low viscosity. In addition, the good glue closing effect can be kept 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 an embodiment of the present invention, further comprising:
the hot melting device is suitable for heating the charging barrel so as to melt the colloid in the charging barrel, and the hot melting device 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 invention, the glue closing mechanism comprises:
the ejector pin is arranged on the valve body in a sliding manner between a first position and a second position, and when the ejector pin is located at the first position, the ejector pin closes the glue outlet hole so as to block the spiral glue feeding channel from the glue dispensing needle head;
and the driving device is connected with the ejector pin and used for driving the ejector pin 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 that of the glue outlet hole;
the axis of the ejector pin is perpendicular to the axis of the glue outlet hole, a communicating structure is arranged on the ejector pin, when the ejector pin is located at the second position, the communicating structure is opposite to the glue outlet hole so that the spiral glue feeding channel is communicated with the glue dispensing needle head, and when the ejector pin is located at the first position, the communicating structure is staggered with the glue outlet hole so that the spiral glue feeding channel is blocked by the glue dispensing needle head.
According to one embodiment of the invention, the communication structure is a hole or a groove.
According to one embodiment of the invention, when the communicating structure is a hole, the axis of the hole is parallel to or coincident with the glue outlet hole; when the communicating structure is a groove, the groove is formed as an annular groove surrounding the outer circumferential surface of the thimble.
According to one embodiment of the invention, the valve body is provided with a thimble hole, and the axis of the thimble hole is vertically intersected with the axis of the glue outlet hole;
a first reaming hole is formed in one end of the thimble hole, a first step surface is formed between the first reaming hole and the thimble hole, a first sealing ring and a first thread pressing ring are arranged in the first reaming hole, the first thread pressing ring is in thread fit with the first reaming hole, and the first sealing ring is tightly pressed and attached to the first step surface;
a second reaming hole is formed in the other end of the thimble hole, a second step surface is formed between the second reaming hole and the thimble hole, a second sealing ring and a second threaded pressing ring are arranged in the second reaming hole, the second threaded pressing ring is in threaded fit with the second reaming hole, and the second sealing ring is tightly pressed and attached to the second step surface;
the thimble wears to establish in the thimble hole, and passes in proper order first screw thread clamping ring, first sealing ring, play gluey hole, second sealing ring and second screw thread clamping ring, first sealing ring and second sealing ring respectively with the thimble is sealed.
According to an embodiment of the present invention, the valve body has a piston chamber thereon, and the driving means 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 ejector pin is connected with the piston, and when the air inlet is used for air inlet, the piston moves along a first direction, so that the ejector pin moves to the second position;
the elastic piece is arranged in the second cavity and 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 heat fusion apparatus includes:
the heat-conducting cylinder is provided with a glue discharging port which is communicated with the glue inlet;
the electric heating piece is wrapped on the peripheral surface of the heat conducting cylinder;
the heat insulation cylinder is sleeved outside the electric heating piece.
On the other hand, the dispensing device according to the embodiment of the invention has the hot-melt screw dispensing valve as described above.
According to the dispensing equipment provided by the embodiment of the invention, the hot-melt screw dispensing valve is arranged, so that the glue closing control can be realized, and the hot-melt dispensing valve can be suitable for glue with low viscosity. In addition, the good glue closing effect can be kept 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 used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural 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 according to an embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a partial enlarged view of fig. 2 with the screw slid 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 hole H101;
a glue outlet H102;
a bushing 104;
a dispensing needle 20;
a glue closing mechanism 30;
a thimble 301;
a slot 3011;
a drive device 302;
a piston 3021;
an elastic member 3022;
a first cavity P10;
a second cavity P11;
exhaust port H11;
a first seal ring 303;
a first threaded compression ring 304;
a second seal ring 305;
a second threaded compression ring 306.
A heat-fusing device 40;
a heat-conducting tube 401;
an electric heating plate 402;
a heat insulating cylinder 403;
an air inlet 404;
and a glue discharge port 405.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present invention and should not be construed as limiting the present invention, and all other embodiments that can be obtained by one skilled in the art based on the embodiments of the present invention without inventive efforts shall fall within the scope of protection of the present invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "circumferential," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The hot melt screw dispensing valve according to an embodiment of the present invention will be 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 glue closing mechanism 30.
Specifically, the screw pump 10 comprises a screw 102, a valve body 101 and a driving motor 103, wherein the screw 102 is arranged in the valve body 101 and defines a spiral glue feeding channel H10 with the valve body 101. The glue feeding valve comprises a valve body 101, a glue feeding hole H101 and a glue discharging hole H102, wherein the glue feeding hole H101 is communicated with the upper end of a spiral glue feeding channel H10, and the glue discharging hole H102 is communicated with the lower end of a 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 hole H101 and the glue outlet hole H102 are both communicated with the spiral feeding channel, and when the hot-melt glue enters the glue inlet hole H101 at a certain pressure, the glue can flow into the spiral feeding channel H10 through the glue inlet hole H101. And the driving motor 103 drives the screw 102 to rotate, so that when the screw 102 rotates, the colloid in the spiral colloid feeding channel H10 is conveyed downwards by the spiral motion of the screw 102, and finally, the colloid can be discharged from the colloid outlet hole H102.
It can be understood that a through hole can be provided in the valve body 101, and the screw 102 is directly 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 wall of the through hole. In addition, a bushing 104 may be fixedly disposed in the through hole, the bushing 104 may be made of a hard material, such as a metal material, e.g., copper, iron, stainless steel, or other alloy, and the screw 102 is inserted into the through hole, such that a spiral glue feeding passage H10 (shown in fig. 2) is defined between an outer circumferential wall of the screw 102 and an inner circumferential wall of the bushing 104.
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 configured to control opening and closing of the glue outlet hole H102, so that the spiral glue feeding channel H10 is communicated with or blocked from the dispensing needle 20.
That is to say, 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 feeding channel communicates with the dispensing needle 20, so that the glue fed out from the spiral glue feeding channel H10 can flow into the dispensing needle 20 through the glue outlet H102, and then drop or spray on the surface to be dispensed of the product through the dispensing needle 20. When the glue closing mechanism 30 closes the glue outlet hole H102, the spiral feeding channel is blocked from the dispensing needle 20, and the glue in the spiral glue feeding channel H10 cannot enter the dispensing needle 20, so that the glue closing is realized.
According to the hot-melt screw dispensing valve provided by the embodiment of the invention, the opening and closing of the glue outlet hole H102 is controlled by the glue closing mechanism 30, so that the spiral glue feeding channel H10 is communicated with or blocked from the dispensing needle head 20, thus the glue closing control can be realized, and the hot-melt screw dispensing valve is ensured to be suitable for glue with low viscosity. In addition, the good glue closing effect can be kept 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, which is adapted to heat the material cylinder to melt the glue in the material cylinder, and the hot melting device 40 is communicated with the glue inlet, so that the melted glue enters the spiral glue feeding channel H10 through the glue inlet.
That is to say, this hot melting device 40 can heat the feed cylinder for the colloid in the feed cylinder melts the colloid that forms the fluid state after being heated, and the colloid of fluid state can be in advancing gluey passageway H10 is sent to the spiral that the mouth flowed into to in the effect of atmospheric pressure, so, in this embodiment, convenient in heating the colloid through hot melting device 40, make after melting, be carried to spiral and send gluey passageway H10 easily.
Referring to fig. 2 to 4, in an embodiment of the present invention, the glue sealing mechanism 30 includes a thimble 301 and a driving device 302, wherein the thimble 301 is slidably disposed on the valve body 101 between a first position and a second position, when the thimble 301 is located at the first position, the thimble 301 closes the glue outlet H102 to block the spiral glue feeding channel H10 from the dispensing needle 20, and when the thimble 301 is located at the second position, the thimble 301 opens the glue outlet H102, and the spiral glue feeding channel H10 is communicated with the dispensing needle 20.
The driving device 302 is connected to the thimble 301 for driving the thimble 301 to move between the first position and the second position.
That is, in this embodiment, the thimble 301 is slidably disposed in the valve body 101, and the driving device 302 drives the thimble 301 to switch between the first position and the second position to control the opening and closing of the glue outlet hole H102, so as to control the on/off of the spiral glue feeding channel H10 and the dispensing needle 20. Specifically, when the thimble 301 is located at the first position, the thimble 301 closes the glue outlet hole H102, for example, the thimble 301 extends into the glue outlet hole H102, so that the glue outlet hole H102 is blocked and closed, and when the thimble 301 is located at the second position, the thimble 301 opens the glue outlet hole H102, for example, the thimble 301 exits the glue outlet hole H102, so that the glue outlet hole H102 is opened, so that the glue outlet hole H102 can be controlled to be opened or closed by switching the thimble 301 between the first position and the second position, which has a simple structure and reliable and stable on-off control.
Referring to fig. 3 to 4, in an example of the present invention, in order to control the opening or closing of the glue outlet H102 by the thimble 301, the diameter of the thimble 301 is greater than or equal to the diameter of the glue outlet H102. The axis of thimble 301 with go out the axis of gluey hole H102 is perpendicular, be equipped with the communicating structure on the thimble 301, when the thimble 301 is located when the second position, the communicating structure with it is relative to go out gluey hole H102, so that spiral send gluey passageway H10 with some glue syringe needle 20 intercommunication, when the thimble 301 is located when the first position, the communicating structure with go out gluey hole H102 dislocation, so that spiral send gluey passageway H10 with some glue syringe needle 20 blocks.
That is to say, in this embodiment, the thimble 301 is provided with a communicating structure, when the thimble 301 is located at the first position, the communicating structure is dislocated from the glue outlet hole H102, at this time, since the diameter of the thimble 301 is greater than or equal to the diameter of the glue outlet hole H102, the thimble 301 vertically penetrates through the glue outlet hole H102, and the thimble 301 can completely block the glue outlet hole H102, so that the glue outlet hole H102 is closed, and the spiral glue feeding channel H10 is blocked from the dispensing needle 20. When the thimble 301 is located at the second position, the communicating structure is opposite to the glue outlet hole H102, and at this time, the spiral glue feeding channel H10 can communicate with the dispensing needle 20 through the communicating structure.
Therefore, in this embodiment, the diameter of the thimble 301 is configured to be greater than or equal to the diameter of the glue outlet hole H102, and the thimble 301 is provided with the communicating structure, so that the thimble 301 can be switched between the first position and the second position, and the glue outlet hole H102 can be opened or closed by using the communicating structure and the glue outlet hole H102 to be opposite or staggered.
Alternatively, the communicating structure may be a hole or slot 3011, and when the hole or slot 3011 is in the second position, the spiral glue feeding channel H10 is communicated with the dispensing needle 20 through the hole or slot 3011.
Advantageously, when the communicating 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 the glue can flow into the glue dispensing needle 20 through the hole more quickly, and the glue outlet effect is improved. When the communicating structure is the groove 3011, the groove 3011 is formed into an annular groove surrounding the outer peripheral surface of the thimble 301, and the annular groove has a larger flow cross section, so that the colloid 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 uniform stress of the thimble 301 is ensured.
Referring to fig. 3 to 4, in an embodiment of the present invention, a valve body 101 is provided with a thimble hole, and an axis of the thimble hole is perpendicular to and intersects with an axis of the glue outlet hole H102.
One end in thimble hole is equipped with first reaming, first reaming with form first step face between the thimble hole, be equipped with first sealing ring 303 and first screw thread clamping ring 304 in the first reaming, first screw thread clamping ring 304 with first reaming screw-thread fit, and will first sealing ring 303 compresses tightly the laminating and is in on the first step face.
The other end in thimble hole is equipped with the second reaming, the second reaming with form the second step face between the thimble hole, be equipped with second sealing ring 305 and second screw thread clamping ring 306 in the second reaming, second screw thread clamping ring 306 with second reaming screw-thread fit, and will second sealing ring 305 compresses tightly the laminating and is in on the second step face.
That is to say, in this embodiment, set up first reaming and second reaming respectively at the both ends of thimble hole, first reaming and the reaming diameter of second all are greater than the thimble hole for form first step face between the one end of first reaming and thimble hole, form second step face between the other end of second reaming and thimble hole. A first sealing ring 303 and a first threaded press ring 304 are arranged in the first counterbore, the first sealing ring 303 is pressed on the first step surface by the first threaded press ring 304, a second sealing ring 305 and a second threaded press ring 306 are arranged in the second counterbore, and the second sealing ring 305 is pressed on the second step surface by the second threaded press ring 306. After the thimble 301 penetrates into the thimble hole, the first sealing ring 303, the second sealing ring 305 and the outer peripheral surface of the thimble 301 are tightly attached to form a seal.
Therefore, the first sealing ring 303 and the second sealing ring 305 are used for sealing the gap between the thimble 301 and the thimble hole, so that the glue in the glue outlet hole H102 cannot leak from the gap between the thimble 301 and the thimble hole, the glue leakage of the dispensing valve is further avoided, and the performance is more reliable. In addition, the first threaded press ring 304 is used for pressing the first seal ring 303, and the second threaded press ring 306 is used for pressing the second seal ring 305, so that the problem of unreliability 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 thereon, 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.
The plunger 301 is connected to the piston 3021, and when the air inlet 404 is filled, the piston 3021 moves in a first direction, so that the plunger 301 moves to the second position.
An elastic member 3022 is disposed in the second chamber P11 to provide an elastic force to push the piston 3021 to move in a second direction opposite to the first direction, so as to move the thimble 301 to the first position.
That is to say, the piston 3021 can slide in the piston cavity, the thimble 301 is connected to the piston 3021, the air inlet 404 can be connected to an external air source device, positive pressure air is provided by the air source device, the air enters the first cavity P10, the piston 3021 is pushed to move along the first direction, at this time, the piston 3021 drives the thimble 301 to move, so that the thimble 301 moves to the second position, the communicating structure is opposite to the glue outlet H102, and the spiral glue feeding channel H10 can be communicated with the dispensing needle 20 through the communicating structure. When the piston 3021 moves in the first direction, the volume of the second cavity P11 gradually decreases, so that the elastic element 3022 is compressed, when the ventilation is stopped, the elastic element 3022 recovers deformation and extends, and the piston 3021 is pushed to move in the second direction under the action of the elastic element 3022, at this time, the piston 3021 drives the thimble 301 to move, so that the thimble 301 recovers to the first position, the communicating structure is dislocated from the glue outlet H102, and the spiral glue feeding channel H10 is blocked from the glue dispensing needle 20.
In this embodiment, the piston 3021 drives the thimble 301 to move, which is simple in structure, and the thimble 301 is reliable in movement, so that the thimble 301 can be reliably switched between the first position and the second position, 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 conducting cylinder 401, an electric heating plate 402 and a heat insulating cylinder 403, the heat conducting cylinder 401 has a glue discharging port 405, and the glue discharging port 405 is communicated with the glue inlet; the electric heating sheet 402 is wrapped on the peripheral surface of the heat conducting cylinder 401; the heat insulation cylinder 403 is sleeved outside the electric heating sheet 402.
The heat conducting cylinder 401 can contain a charging cylinder, colloid can be filled in the charging cylinder, a cover body can be arranged at the top of the heat conducting cylinder 401, an air pipe connector is arranged on the cover body, and air can be ventilated into the charging cylinder by the aid of the air pipe connector. The electric heat piece 402 parcel can carry out the even heating to heat conduction section of thick bamboo 401 outside heat conduction section of thick bamboo 401, and the heat conducts to the feed cylinder through heat conduction section of thick bamboo 401 for the colloid in the feed cylinder is melted after being heated. And heat insulating cylinder 403 is sleeved outside electric heating plate 402, and can play a role in heat insulation and heat preservation, and prevent heat from being conducted to the outside atmosphere, on one hand, the heat insulating cylinder can play a role in heat preservation, and avoid heat from being conducted to the atmosphere and causing heat loss, and on the other hand, the heat insulating cylinder plays a role in heat insulation and protection, and prevents dangers such as scalding due to contact with heat conducting cylinder 401.
It can be understood that the heat conducting cylinder 401 is generally made of a metal material with good heat conductivity, such as an aluminum alloy material, a stainless steel material, etc., so that a good heat conducting effect can be achieved. The electric heat piece 402 can adopt silica gel electric heat piece 402, etc., and the wrapping nature of silica gel electric heat piece 402 to heat conduction section of thick bamboo 401 is good for heat conduction section of thick bamboo 401 is heated evenly, and heat-conduction is faster. The heat insulation cylinder 403 may be made of heat insulation high temperature resistant plastic material, such as PEEK plastic material.
The dispensing equipment 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-melt screw dispensing valve is arranged, so that the glue closing control can be realized, and the hot-melt dispensing valve can be suitable for glue with low viscosity. In addition, the good glue closing effect can be kept for a long time, and the performance is reliable and stable.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer 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, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. The utility model provides a hot melt screw dispensing valve which characterized in that includes:
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 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 communicated with the glue outlet hole;
and the glue closing mechanism is arranged on the valve body and used for controlling the opening and closing of the glue outlet hole so as to enable the spiral glue feeding channel to be communicated with or blocked by the glue dispensing needle head.
2. The hot melt screw dispensing valve of claim 1, further comprising:
the hot melting device is suitable for heating the charging barrel so as to melt the colloid in the charging barrel, and the hot melting device is communicated with the glue inlet so as to enable the melted colloid to enter the spiral glue feeding channel through the glue inlet.
3. The hot melt screw dispensing valve of claim 1, wherein the glue shut-off mechanism comprises:
the ejector pin is arranged on the valve body in a sliding manner between a first position and a second position, and when the ejector pin is located at the first position, the ejector pin closes the glue outlet hole so as to block the spiral glue feeding channel from the glue dispensing needle head;
and the driving device is connected with the ejector pin and used for driving the ejector pin to move between the first position and the second position.
4. The hot melt screw dispensing valve according to claim 3, wherein the diameter of the thimble is greater than or equal to the diameter of the glue outlet hole;
the axis of the ejector pin is perpendicular to the axis of the glue outlet hole, a communicating structure is arranged on the ejector pin, when the ejector pin is located at the second position, the communicating structure is opposite to the glue outlet hole so that the spiral glue feeding channel is communicated with the glue dispensing needle head, and when the ejector pin is located at the first position, the communicating structure is staggered with the glue outlet hole so that the spiral glue feeding channel is blocked by the glue dispensing needle head.
5. The hot melt screw dispensing valve of claim 4, wherein the communication structure is a hole or a groove.
6. The hot-melt screw dispensing valve according to claim 4, wherein when the communicating structure is a hole, the axis of the hole is parallel to or coincident with the glue outlet hole; when the communicating structure is a groove, the groove is formed as an annular groove surrounding the outer circumferential surface of the thimble.
7. The hot melt screw dispensing valve according to claim 1, wherein a thimble hole is provided on the valve body, and an axis of the thimble hole is perpendicularly intersected with an axis of the glue outlet hole;
a first reaming hole is formed in one end of the thimble hole, a first step surface is formed between the first reaming hole and the thimble hole, a first sealing ring and a first thread pressing ring are arranged in the first reaming hole, the first thread pressing ring is in thread fit with the first reaming hole, and the first sealing ring is tightly pressed and attached to the first step surface;
a second reaming hole is formed in the other end of the thimble hole, a second step surface is formed between the second reaming hole and the thimble hole, a second sealing ring and a second threaded pressing ring are arranged in the second reaming hole, the second threaded pressing ring is in threaded fit with the second reaming hole, and the second sealing ring is tightly pressed and attached to the second step surface;
the thimble wears to establish in the thimble hole, and passes in proper order first screw thread clamping ring, first sealing ring, play gluey hole, second sealing ring and second screw thread clamping ring, first sealing ring and second sealing ring respectively with the thimble is sealed.
8. The hot melt screw dispensing valve of claim 1, wherein the valve body has a piston chamber thereon, the drive means comprising:
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 ejector pin is connected with the piston, and when the air inlet is used for air inlet, the piston moves along a first direction, so that the ejector pin moves to the second position;
the elastic piece is arranged in the second cavity and 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.
9. The hot melt screw dispensing valve of claim 2, wherein the hot melt device comprises:
the heat-conducting cylinder is provided with a glue discharging port which is communicated with the glue inlet;
the electric heating piece is wrapped on the peripheral surface of the heat conducting cylinder;
the heat insulation cylinder is sleeved outside the electric heating piece.
10. A dispensing apparatus, characterized by having a hot-melt screw dispensing valve according to any one of claims 1 to 9.
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 true CN110899060A (en) | 2020-03-24 |
| CN110899060B CN110899060B (en) | 2024-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| TWI767708B (en) * | 2021-05-11 | 2022-06-11 | 新煒科技有限公司 | Glue dispensing device |
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|---|---|
| CN110899060B (en) | 2024-05-28 |
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