Injection blow molding system with enhanced supply of heat transfer fluid to parison molds
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B29C-049/06
B29C-049/64
출원번호
US-0951934
(2010-11-22)
등록번호
US-8512028
(2013-08-20)
발명자
/ 주소
Fields, Randal L.
Wardlow, Bruce A.
Brunson, David A.
출원인 / 주소
R&D Tool & Engineering Co.
대리인 / 주소
Hovey Williams LLP
인용정보
피인용 횟수 :
1인용 특허 :
18
초록▼
An injection blow molding (IBM) system and method for forming a plurality of parisons and molded articles. The IBM system includes an injection station having two die sets and two mold half assemblies. Each of the mold assemblies is attached to one of the die sets. The mold half assemblies are confi
An injection blow molding (IBM) system and method for forming a plurality of parisons and molded articles. The IBM system includes an injection station having two die sets and two mold half assemblies. Each of the mold assemblies is attached to one of the die sets. The mold half assemblies are configured to cooperatively form the exterior shape of the necks of a plurality of parisons. Heat transfer channels formed in both the die sets and the mold half assemblies are fluidly connected with each other, such that a heat transfer fluid can be routed to the mold half assemblies via the die sets.
대표청구항▼
1. An injection blow molding system for injection molding a resin into a plurality of parisons and blow molding said parisons into a plurality of molded articles, said injection blow molding system comprising: an injection station for injection molding said resin into said parisons,a blowing station
1. An injection blow molding system for injection molding a resin into a plurality of parisons and blow molding said parisons into a plurality of molded articles, said injection blow molding system comprising: an injection station for injection molding said resin into said parisons,a blowing station for blow molding said parisons into said molded articles; andan indexing head for transferring said parisons from said injection station to said blowing station,wherein said injection station comprises first and second neck mold halves shiftable between an open position and a closed position,wherein said first and second neck mold halves present respective first and second neck-forming surfaces for cooperatively defining the exterior shape of the necks of said parisons when said neck mold halves are in said closed position,wherein each of said neck mold halves at least partly defines a contoured heat transfer channel associated with each of said neck-forming surfaces,wherein each of said contoured heat transfer channels includes a inner face having a shape that substantially corresponds to the shape of said neck-forming surface with which it is associated,wherein each of said first and second neck mold halves defines at least one supply channel and at least one return channel, wherein each of said contoured heat transfer channels is connected in fluid-flow communication with one of said supply channels and one of said return channels,wherein said supply and return channels are connected to generally opposite ends of the contoured heat transfer channel with which they are associated, wherein said supply and return heat transfer channels are substantially linear, wherein said supply and return channels extend from said contoured heat transfer channel in a direction that is generally away from said neck-forming surface with which the contoured heat transfer channel is associated. 2. The system of claim 1, wherein said inner face of said contoured heat transfer channel is spaced from said neck-forming surface with which it is associated by 0.05 to 2 inches. 3. The system of claim 1, wherein said inner face of said contoured heat transfer channel has an arcuate shape. 4. The system of claim 1, wherein said inner face of said contoured heat transfer channel has a radius of curvature in the range of 0.25 to 5 inches. 5. The system of claim 1, wherein said inner face of said contoured heat transfer channel is spaced from said neck-forming surface with which it is associated by 0.1 to 1 inch, wherein said inner face of said contoured heat transfer channel has an arcuate shape, wherein said inner face of said contoured heat transfer channel is substantially concentric with said neck-forming surface with which it is associated, wherein said inner face of said contoured heat transfer channel has a radius of curvature in the range of 0.5 to 3 inches, wherein said inner face of said contoured heat transfer channel extends through an angle in the range of 120 to 180 degrees. 6. An injection blow molding system for injection molding a resin into a plurality of parisons and blow molding said parisons into a plurality of molded articles, said injection blow molding system comprising: an injection station for injection molding said resin into said parisons;a blowing station for blow molding said parisons into said molded articles; andan indexing head for transferring said parisons from said injection station to said blowing station; anda heat transfer fluid source,wherein said injection station defines one or more heat transfer channels coupled in fluid-flow communication with said heat transfer fluid source,wherein said injection station comprises first and second die sets shiftable between an open position and a closed position,wherein said injection station further comprises a split parison mold assembly comprising first and second mold half assemblies coupled to said the first and second die sets respectively,wherein said first and second mold half assemblies cooperatively define a plurality of parison cavities when said die sets are in said closed position,wherein said first and second die sets and said first and second mold half assemblies define a plurality of said heat transfer channels,wherein at least a portion of said heat transfer channels defined within said first and second mold half assemblies are connected in fluid-flow communication with at least a portion of said heat transfer fluid channels defined within said first and second die sets in a manner such that heat transfer fluid is supplied to heat transfer channels defined within said first and second mold half assemblies by heat transfer channels defined within said first and second die sets respectively. 7. The system of claim 6, wherein said first and second mold half assemblies include first and second neck mold halves shiftable between an open position and a closed position, wherein said first and second neck mold halves present respective first and second neck-forming surfaces for cooperatively defining the exterior shape of the necks of said parisons when said neck mold halves are in said closed position, wherein each of said neck mold halves at least partly defines a contoured heat transfer channel associated with each of said neck-forming surfaces, wherein each of said contoured heat transfer channels includes an inner face having a shape that substantially corresponds to the shape of said neck-forming surface with which it is associated, wherein each of said first and second neck mold halves defines at least one supply channel and at least one return channel, wherein each of said contoured heat transfer channels is connected in fluid-flow communication with one of said supply channels and one of said return channels, wherein each of said die sets defines at least one connecting heat transfer channel extending from at least one of said return channels to at least one of said supply heat transfer channels. 8. An injection blow molding system for injection molding a resin into a plurality of parisons and blow molding said parisons into a plurality of molded articles, said injection blow molding system comprising: an injection station for injection molding said resin into said parisons;a blowing station for blow molding said parisons into said molded articles; andan indexing head for transferring said parisons from said injection station to said blowing station,wherein said injection station comprises first and second neck mold halves shiftable between an open position and a closed position,wherein said first and second neck mold halves present respective first and second neck-forming surfaces for cooperatively defining the exterior shape of the necks of said parisons when said neck mold halves are in said closed position,wherein each of said neck mold halves at least partly defines a contoured heat transfer channel associated with each of said neck-forming surfaces,wherein each of said contoured heat transfer channels includes a inner face having a shape that substantially corresponds to the shape of said neck-forming surface with which it is associated,wherein said injection station further comprises first and second interlock inserts disposed adjacent said first and second neck mold halves respectively, wherein said interlock inserts and said neck mold halves cooperatively define said contoured channels. 9. The system of claim 8, wherein said injection station further comprises first and second die sets to which said first and second neck mold halves and said first and second interlock inserts are coupled respectively, wherein said injection station further comprises first and second body mold halves coupled to said first and second dies sets respectively, wherein said first and second body mold halves present respective first and second cavity body surfaces for cooperatively defining the exterior shape of the body of neck of said parisons, wherein said first and second neck mold halves are disposed between said first and second body mold halves and said first and second interlock inserts respectively. 10. The system of claim 9, wherein a first insulating gap is defined between at least a portion of said first body mold half and said first neck mold half, wherein a second insulating gap is defined between at least a portion of said second body mold half and said second neck mold half. 11. The system of claim 6, wherein said first and second mold half assemblies include first and second neck mold halves shiftable between an open position and a closed position, wherein said first and second neck mold halves present respective first and second neck-forming surfaces for cooperatively defining the exterior shape of the necks of said parisons when said neck mold halves are in said closed position, wherein each of said neck mold halves at least partly defines a contoured heat transfer channel associated with each of said neck-forming surfaces, wherein each of said contoured heat transfer channels includes a inner face having a shape that substantially corresponds to the shape of said neck-forming surface with which it is associated, wherein said first and second mold half assemblies further comprise first and second body mold halves coupled to said first and second dies sets respectively, wherein said first and second body mold halves present respective first and second body-forming surfaces for cooperatively defining the exterior shape of the bodies of said parisons, wherein at least 2 percent of the total volume of said heat transfer channels is defined within said neck mold halves, wherein at least 30 percent of the total volume of said heat transfer channels is defined within said die sets, wherein less than 50 percent of the total volume of said heat transfer channels is defined within said body mold halves. 12. The system of claim 6, wherein said heat transfer channels defined within each of said mold half assemblies include at least two spaced-apart heat transfer channels, wherein said heat transfer channels defined within each of said dies sets include at least one connecting heat transfer channel, wherein said connecting heat transfer channel connects at least two of said spaced-apart heat transfer channels in fluid-flow communication with one another. 13. The system of claim 6, wherein at least a portion of said heat transfer channels defined within said die sets connect said heat transfer channels defined within said mold half assemblies in serial fluid-flow communication with one another. 14. The system of claim 6, wherein said first and second mold half assemblies are directly coupled to said first and second dies sets respectively, wherein said injection station further comprises a plurality of first and second sealing members, wherein each of said first sealing members is disposed between said first die set and said first mold half assembly proximate a location where one of said heat transfer channels defined in said first die set connects in fluid-flow communication with one of said heat transfer channels defined in said first mold half assembly, wherein each of said second sealing members is disposed between said second die set and said second mold half assembly proximate a location where one of said heat transfer channels defined in said second die set connects in fluid-flow communication with one of said heat transfer channels defined in said second mold half assembly. 15. The system of claim 6, wherein the ratio of the total volume of said heat transfer channels defined in said die sets to the total volume of said heat transfer channels defined in said mold half assemblies is at least 1:1, wherein the total volume of said heat transfer channels defined in said die sets and said mold half assemblies is at least 10 cubic inches. 16. The system of claim 6, wherein said first and second mold half assemblies comprise respective first and second neck mold halves for cooperatively defining the exterior shape of the necks of said parisons, wherein at least a portion of said heat transfer channels is defined within said neck mold halves, wherein said heat transfer channels defined within each of said neck mold halves include at least two spaced-apart heat transfer channels, wherein said heat transfer channels defined within each of said dies sets include at least one connecting heat transfer channel, wherein said connecting heat transfer channel connects at least two of said spaced-apart heat transfer channels in fluid-flow communication with one another. 17. The system of claim 16, wherein said first and second neck mold halves are directly coupled to said first and second die sets respectively. 18. The system of claim 16, wherein said first and second mold half assemblies comprise first and second body mold halves for cooperatively defining the exterior shape of the bodies of said parisons, wherein less than 50 percent of the total volume of said heat transfer channels defined in said die sets and said mold half assemblies is defined within said body mold halves. 19. A tooling system for the injection station of an injection blow molding machine, wherein said injection station is configured for injection molding a resin into a plurality of parisons, said tooling system comprising: a die set system comprising first and second die sets adapted to be shifted between an open position and a closed position when the die set system is coupled with an injection blow molding machine; anda split parison mold assembly comprising first and second mold half assemblies adapted to be coupled to said first and second die sets respectively,wherein said first and second mold half assemblies cooperatively define a plurality of parison cavities when the first and second mold half assemblies are coupled to said first and second die sets and said die sets are in said closed position,wherein said first and second dies sets and said first and second mold half assemblies define a plurality of heat transfer fluid channels,wherein, when said first and second mold half assemblies are coupled to said first and second die sets respectively, at least a portion of said heat transfer channels defined within said first and second mold half assemblies are connected in fluid-flow communication with at least a portion of said heat transfer fluid channels defined within said first and second die sets in a manner such that heat transfer fluid may be supplied to heat transfer channels defined within said first and second mold half assemblies by heat transfer channels defined within said first and second die sets respectively. 20. The system of claim 19, wherein said heat transfer channels defined within each of said mold half assemblies include at least two spaced-apart heat transfer channels, wherein said heat transfer channels defined within each of said dies sets include at least one connecting heat transfer channel, wherein said connecting heat transfer channel is disposed to connect at least two of said spaced-apart heat transfer channels in fluid-flow communication with one another. 21. The system of claim 19, wherein at least a portion of said heat transfer channels defined within said die sets are disposed to connect said heat transfer channels defined within said mold half assemblies in serial fluid-flow communication with one another. 22. The system of claim 19, wherein said first and second mold half assemblies are configured to be directly coupled to said first and second dies sets respectively, further comprising a plurality of first and second sealing members, wherein each of said first sealing members is configured to be disposed between said first die set and said first mold half assembly proximate a location where one of said heat transfer channels defined in said first die set connects in fluid-flow communication with one of said heat transfer channels defined in said first mold half assembly, wherein each of said second sealing members is configured to be disposed between said second die set and said second mold half assembly proximate a location where one of said heat transfer channels defined in said second die set connects in fluid-flow communication with one of said heat transfer channels defined in said second mold half assembly. 23. The system of claim 19, wherein the ratio of the total volume of said heat transfer channels defined in said die sets to the total volume of said heat transfer channels defined in said mold half assemblies is at least 1:1, wherein the total volume of said heat transfer channels defined in said die sets and said mold half assemblies is at least 10 cubic inches. 24. The system of claim 19, wherein said first and second mold half assemblies comprise respective first and second neck mold halves for cooperatively defining the exterior shape of the necks of said parisons, wherein at least a portion of said heat transfer channels is defined within said neck mold halves, wherein said heat transfer channels defined within each of said neck mold halves include at least two spaced-apart heat transfer channels, wherein said heat transfer channels defined within each of said dies sets include at least one connecting heat transfer channel, wherein said connecting heat transfer channel is disposed to connect at least two of said spaced-apart heat transfer channels in fluid-flow communication with one another. 25. The system of claim 24, wherein said first and second neck mold halves are configured to be directly coupled to said first and second die sets respectively. 26. The system of claim 24, wherein said first and second mold half assemblies comprise first and second body mold halves for cooperatively defining the exterior shape of the bodies of said parisons, wherein less than 50 percent of the total volume of said heat transfer channels defined in said die sets and said mold half assemblies is defined within said body mold halves. 27. Neck mold tooling for use in injection molding a resin into parisons, said tooling comprising: a first neck mold half presenting a portion of a neck-forming surface; anda second neck mold half presenting another portion of a neck-forming surface,said first and second neck mold halves being configured to cooperatively define the exterior shape of the neck of a parison when the neck mold halves are disposed against one another with said neck-forming surfaces facing one another,each of said neck mold halves having an exterior surface provided with an open, coverable, contoured recess therein that extends at least partially around said portion of the neck-forming surface of the neck mold half,each of said recesses serving to define a contoured channel for heat transfer fluid around the neck-forming surface associated with the recess when adjacent structure lies against said exterior surface of the neck mold half and covers the recess. 28. Neck mold tooling as claimed in claim 27, further comprising first and second interlock inserts for said first and second neck mold halves respectively, wherein said interlock inserts comprise said adjacent structure. 29. Neck mold tooling as claimed in claim 27, wherein said first and second neck mold halves are each provided with a single one of said neck-forming surfaces. 30. Neck mold tooling as claimed in claim 27, wherein said first and second neck mold halves are each provided with a plurality of said neck-forming surfaces disposed in spaced apart, side-by-side relationship. 31. Neck mold tooling as claimed in claim 27, wherein each of said first and second neck mold halves is provided with an internal heat transfer fluid supply channel and an internal heat transfer fluid return channel, said supply channel and said return channel being disposed in fluid flow communication with said recess and disposed below said exterior surface of the neck mold half. 32. Neck mold tooling as claimed in claim 31, wherein said supply channel and said return channel extend from said recess in a direction that is generally away from said neck-forming surface with which the recess is associated. 33. Neck mold tooling as claimed in claim 31, wherein said exterior surface of each neck mold half is flat, said supply channel and said return channel extending parallel to said exterior surface. 34. Neck mold tooling as claimed in claim 31, wherein said supply channel and said return channel of each neck mold half intersect with said recess at opposite ends of the recess. 35. Neck mold tooling as claimed in claim 27, wherein said recess of each neck mold half is substantially concentric with the neck-forming surface of the neck mold half with which it is associated. 36. Neck mold tooling as claimed in claim 35, wherein said recess of each neck mold half extends through an included angle in the range of 90 to 180 degrees.
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이 특허에 인용된 특허 (18)
Ninneman Lawrence D. (Toledo OH), Apparatus for forming tubular plastic articles.
Hillman Michael J. (Ocean City NJ) Jacoby Bruce E. (Vineland NJ) Barbosa Rui M. (Millville NJ 4), Graphical interface driven injection blow molding apparatus.
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