System and method for dispensing hot melt adhesives
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B67D-007/80
C09J-005/00
B05C-011/10
B65H-049/26
B65H-051/10
C09J-175/04
C09J-153/02
C09J-153/00
B29B-013/02
C09J-177/00
B05B-009/00
B05C-005/02
출원번호
US-0931355
(2015-11-03)
등록번호
US-9920222
(2018-03-20)
발명자
/ 주소
Das, Suprotik
Fong, Sheenfar S.
Otsuka, Akio
Saidman, Laurence B.
출원인 / 주소
Nordson Corporation
대리인 / 주소
Baker & Hostetler LLP
인용정보
피인용 횟수 :
0인용 특허 :
10
초록▼
A system for dispensing hot melt adhesives, comprising an adhesive dispenser including a fluid passage leading to an outlet. The system further comprises a supply conduit fluidly connected to the fluid passage and a feeding mechanism configured to feed an elongate, flexible element of solid adhesive
A system for dispensing hot melt adhesives, comprising an adhesive dispenser including a fluid passage leading to an outlet. The system further comprises a supply conduit fluidly connected to the fluid passage and a feeding mechanism configured to feed an elongate, flexible element of solid adhesive into the supply conduit. The system further comprises a first heating element positioned along at least a portion of the supply conduit to melt a portion of the elongate, flexible element being fed into the supply conduit and thereby form a supply of liquid adhesive within the supply conduit.
대표청구항▼
1. A system for dispensing hot melt adhesives, the system comprising: an adhesive dispenser comprising a fluid passage leading to an outlet;a supply conduit fluidly connected to the fluid passage;a feeding mechanism configured to feed an elongate, flexible element of solid hot melt adhesive into the
1. A system for dispensing hot melt adhesives, the system comprising: an adhesive dispenser comprising a fluid passage leading to an outlet;a supply conduit fluidly connected to the fluid passage;a feeding mechanism configured to feed an elongate, flexible element of solid hot melt adhesive into the supply conduit;a first heating element positioned along at least a portion of the supply conduit to melt a portion of the elongate, flexible element being fed into the supply conduit and thereby form a supply of liquid adhesive within the supply conduit;a valve member mounted for movement between open and closed positions within the fluid passage, wherein the valve member allows fluid pressure to build in the system when the valve member is in the closed position;a heat exchange device comprising a second heating element between the supply conduit and the fluid passage, the heat exchange device configured to heat the liquid adhesive to an application temperature suitable for an adhesive bonding application;a manifold between the heat exchange device and the adhesive dispenser, the manifold comprising a third heating element configured to maintain the liquid adhesive at the application temperature; anda pressure sensor configured to sense a fluid pressure in the manifold, wherein the pressure sensor is coupled to a feedback controller of the feeding mechanism. 2. The system of claim 1, wherein the first heating element further comprises: a heater cable wrapped about at least a portion of the supply conduit. 3. The system of claim 1, further comprising: a pressure sensor configured to sense a pressure of liquid adhesive in at least one portion of the system; anda controller in communication with the pressure sensor, the controller configured to control the feeding mechanism. 4. A system for dispensing hot melt adhesives, the system comprising: an adhesive dispenser comprising a fluid passage leading to an outlet;a supply conduit fluidly connected to the fluid passage;a feeding mechanism configured to feed an elongate, flexible element of solid hot melt adhesive into the supply conduit;a first heating element positioned along at least a portion of the supply conduit to melt a portion of the elongate, flexible element being fed into the supply conduit and thereby form a supply of liquid adhesive within the supply conduit; anda valve member mounted for movement between open and closed positions within the fluid passage, wherein the valve member allows fluid pressure to build in the system when the valve member is in the closed position,wherein a portion of the supply of liquid adhesive solidifies around a portion of the elongate, flexible element and thereby forms an annular plug within at least a portion of the supply conduit. 5. The system of claim 4, wherein the elongate, flexible element further comprises a cord, a flat ribbon, or is in the form of a spool. 6. The system of claim 4, wherein the elongate, flexible element further comprises a coating material covering the solid hot melt adhesive to protect the solid hot melt adhesive from the environment. 7. The system of claim 6, wherein the coating material comprises a meltable polymer. 8. The system of claim 1, wherein the feeding mechanism further comprises: at least one roller configured to frictionally engage the elongate, flexible element in order to feed and advance the elongate, flexible element; anda motor operably coupled to the at least one roller. 9. The system of claim 8, further comprising: a torque limiting mechanism configured to selectively disengage the motor and the at least one roller when a pressure of liquid adhesive in the system is at a predetermined pressure level. 10. The system of claim 8, wherein the at least one roller further comprises: a set of rollers positioned to engage different portions of the elongate, flexible element and advance the elongate, flexible element relative to the supply conduit. 11. The system of claim 10, wherein one of the rollers in the set of rollers is a driven roller and the other of the rollers in the set of rollers is an idler roller. 12. The system of claim 1, further comprising: a tube having a first end positioned downstream of a first portion of the feeding mechanism, and a second end positioned upstream of a second portion of the feeding mechanism, the tube comprising a lumen between the first and second ends sized to receive and allow movement of the elongate, flexible element therethrough. 13. The system of claim 12, wherein: the first portion of the feeding mechanism further comprises a first set of rollers configured to frictionally engage the elongate, flexible element in order to feed the elongate, flexible element into the lumen at the first end of the tube; andthe second portion of the feeding mechanism further comprises a second set of rollers configured to frictionally engage the elongate, flexible element after the elongate, flexible element has exited from lumen at the second end of the tube and feed the elongate, flexible element into the supply conduit. 14. The system of claim 1, wherein the valve member is an on/off valve member. 15. The system of claim 1, wherein the valve member is a variable flow valve member. 16. The system of claim 1, further comprising: at least one exposed area disposed between a portion of the feeding mechanism and the first heating element, wherein the elongate, flexible element is fed through the exposed area; anda protective housing enclosing the at least one exposed area. 17. The system of claim 16, wherein the protective housing is filled with dry air that lacks moisture. 18. The system of claim 1, wherein the system is configured to limit advancement of the feeding mechanism in response to exceeding a predetermined fluid pressure. 19. The system of claim 18, further comprising a clutch, the clutch being configured to limit torque applied by the feeding mechanism to advance the flexible element when the fluid pressure against the flexible element exceeds the predetermined fluid pressure. 20. The system of claim 1, further comprising a wiper element positioned upstream of the supply conduit. 21. The system of claim 1, further comprising a manifold comprising a plurality of dispensing devices. 22. The system of claim 21, wherein each of the plurality of dispensing devices comprises at least one valve member. 23. The system of claim 9, wherein the predetermined pressure level is between 30 psi and 190 psi. 24. The system of claim 1, further comprising: at least one exposed area positioned between a portion of the feeding mechanism and the first heating element, wherein the elongate, flexible element is fed through the exposed area; anda protective housing enclosing the at least one exposed area. 25. The system of claim 24, wherein the protective housing is filled with a dry gas that lacks moisture. 26. The system of claim 24, wherein the protective housing extends from the portion of the feeding mechanism to the supply conduit. 27. The system of claim 4, wherein the feeding mechanism further comprises: at least one roller configured to frictionally engage the elongate, flexible element in order to feed and advance the elongate, flexible element; anda motor operably coupled to the at least one roller. 28. The system of claim 27, further comprising: a torque limiting mechanism configured to selectively disengage the motor and the at least one roller when a pressure of liquid adhesive in the system is at a predetermined pressure level. 29. The system of claim 27, wherein the at least one roller further comprises: a set of rollers positioned to engage different portions of the elongate, flexible element and advance the elongate, flexible element relative to the supply conduit. 30. The system of claim 29, wherein one of the rollers in the set of rollers is a driven roller and the other of the rollers in the set of rollers is an idler roller. 31. The system of claim 4, further comprising: a tube having a first end positioned downstream of a first portion of the feeding mechanism, and a second end positioned upstream of a second portion of the feeding mechanism, the tube comprising a lumen between the first and second ends sized to receive and allow movement of the elongate, flexible element therethrough. 32. The system of claim 31, wherein: the first portion of the feeding mechanism further comprises a first set of rollers configured to frictionally engage the elongate, flexible element in order to feed the elongate, flexible element into the lumen at the first end of the tube; andthe second portion of the feeding mechanism further comprises a second set of rollers configured to frictionally engage the elongate, flexible element after the elongate, flexible element has exited from lumen at the second end of the tube and feed the elongate, flexible element into the supply conduit. 33. The system of claim 4, wherein the valve member is an on/off valve member. 34. The system of claim 4, wherein the valve member is a variable flow valve member. 35. The system of claim 4, further comprising: at least one exposed area disposed between a portion of the feeding mechanism and the first heating element, wherein the elongate, flexible element is fed through the exposed area; anda protective housing enclosing the at least one exposed area. 36. The system of claim 35, wherein the protective housing is filled with dry air that lacks moisture. 37. The system of claim 4, wherein the system is configured to limit advancement of the feeding mechanism in response to exceeding a predetermined fluid pressure. 38. The system of claim 37, further comprising a clutch, the clutch being configured to limit torque applied by the feeding mechanism to advance the flexible element when the fluid pressure against the flexible element exceeds the predetermined fluid pressure. 39. The system of claim 4, further comprising a wiper element positioned upstream of the supply conduit. 40. The system of claim 4, further comprising a manifold comprising a plurality of dispensing devices. 41. The system of claim 40, wherein each of the plurality of dispensing devices comprises at least one valve member. 42. The system of claim 28, wherein the predetermined pressure level is between 30 psi and 190 psi. 43. The system of claim 4, further comprising: at least one exposed area positioned between a portion of the feeding mechanism and the first heating element, wherein the elongate, flexible element is fed through the exposed area; anda protective housing enclosing the at least one exposed area. 44. The system of claim 43, wherein the protective housing is filled with a dry gas that lacks moisture. 45. The system of claim 43, wherein the protective housing extends from the portion of the feeding mechanism to the supply conduit.
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이 특허에 인용된 특허 (10)
Sperry Charles R. (113 Clinton St. Springfield VT 05156) Bladyka Paul J. (Chester VT), Apparatus, method and article for applying a melted adhesive.
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