Molded plastic container and preform having insert-molded insert
View Patent ↗A method of making a plastic container having an RFID tag in a wall of the container includes providing a mold having a mold core and mounting an insert on the core. The insert includes an RFID tag surrounded by a plastic housing, which preferably is retained on the core for example by heat of the core partially melting the housing. A plastic preform is formed in the mold around the core and the insert, preferably by injection molding, such that the insert is embedded in a wall of the preform. The preform is then blow molded into a plastic container having the insert embedded in a wall of the container. The insert preferably is mounted on an end of the core such that the insert is in the base wall of the container following blow molding. The RFID tag preferably is externally covered by plastic material in the preform as molded, and in the container as blow molded, so that the RFID tag is not externally exposed in the preform or the container. The disclosure also contemplates a container preform and a blow molded plastic container manufactured in accordance with a method of the disclosure.
1. A method of making a plastic container having an insert in a wall of the container, which includes the steps of:
(a) providing a mold that includes a mold core and a female mold section,
(b) mounting an insert on said core wherein said insert includes a plastic housing and is retained on said core, and closing said mold to form a mold cavity around said core,
(c) forming a plastic preform in said mold cavity around said mold core and said insert such that said insert is embedded in a wall of said preform, wherein said insert is externally covered by plastic material of said preform so that said insert is not externally exposed, and
(d) blow molding said preform into a plastic container having said insert embedded in a wall of the container,
wherein said step (b) includes mounting said insert on an end of said core such that said insert is in a closed end of said preform following step (c) and in a base wall of the container following said step (d),
wherein temperature of said core is such that said core partially melts said plastic housing wherein said insert is retained on said core following said step (b).
2. The method set forth in claim 1 wherein said step (c) includes injection molding said plastic preform in said mold around said core and said insert.
3. A method of making a plastic container having an insert in a wall of the container, which includes the steps of:
(a) providing a mold that includes a mold core and a female mold section,
(b) mounting an insert on said core wherein said insert is retained on said core, and closing said mold to form a mold cavity around said core,
(c) forming a plastic preform in said mold cavity around said mold core and said insert such that said insert is embedded in a wall of said preform, wherein said insert is externally covered by plastic material of said preform so that said insert is not externally exposed, and
(d) blow molding said preform into a plastic container having said insert embedded in a wall of the container,
wherein said step (b) includes mounting said insert on an end of said core such that said insert is in a base wall of the container following said step (d),
wherein said step (a) includes providing an ejection rod on said core, and wherein said step (d) includes activating said ejection rod to facilitate separation of said insert from said core during blow molding.
4. The method set forth in claim 1 wherein said insert includes an RFID tag coupled to an rf antenna within said plastic housing.
5. The method set forth in claim 3 wherein said core has a conical opening at an end of said core, and wherein said insert has a conical plug that is inserted into said opening during said step (b).
6. A method of making a plastic container preform having an insert in a wall of the preform, which includes the steps of:
(a) providing a mold that includes a mold core and a female mold section,
(b) mounting an insert on said core wherein said insert includes a plastic housing and is retained on said core, and closing said mold to form a mold cavity around said core, and
(c) forming a plastic preform in said mold cavity around said core and said insert such that said insert is embedded in a wall of said preform wherein said insert is externally covered by plastic material of said preform so that said insert is not externally exposed,
wherein said step (b) includes mounting said insert on an end of said core such that said insert is in a closed end of said preform following said step (c) and in a base wall of the container following blow molding of said preform,
wherein temperature of said core is such that said core partially melts said plastic housing wherein said insert is retained on said core following said step (b).
7. A method of making a plastic container having an insert in a wall of the container, which includes the steps of:
(a) providing a mold that includes a mold core having an ejection rod, and a female mold section,
(b) mounting an insert on said core wherein said insert is retained on said core, and closing said mold to form a mold cavity around said core, and
(c) forming a plastic preform in said mold cavity around said mold core and said insert such that said insert is embedded in a wall of said preform, wherein said insert is externally covered by plastic material of said preform so that said insert is not externally exposed,
wherein said step (b) includes mounting said insert on an end of said core such that said insert is in a closed end of said preform following said step (c) and in a base wall of the container following blow molding of said preform, and said ejection rod is activatable to facilitate separation of said insert from said core.
8. The method set forth in claim 7 wherein said step (c) includes injection molding said plastic preform in said mold around said core and said insert.
9. The method set forth in claim 7 including (d) blow molding said preform into a container having said insert embedded in said base wall of said container, and activating said ejection rod to facilitate separation of said insert from said core during said blow molding.
10. The method set forth in claim 6 wherein said insert includes an RFID tag within a plastic housing.
11. The method set forth in claim 3 wherein said insert is retained on said mold core by press fit.
12. The method set forth in claim 7 wherein said insert is retained on said mold core by press fit.
13. A method of making a plastic container, which includes the steps of:
(a) providing a mold that includes a mold core having an ejection rod, and a female mold section,
(b) mounting an insert on an end of said core wherein said insert is retained on said core, and closing said mold to form a mold cavity around said core,
(c) forming a plastic preform in said mold cavity around said mold core and said insert such that said insert is embedded in a closed end of said preform, wherein said insert is externally covered by plastic material of said preform so that said insert is not externally exposed, and
(d) blow molding said preform into a plastic container having said insert embedded in a base wall of the container, and activating said ejection rod during the blow molding step to facilitate separation of said insert from said core.
14. The method set forth in claim 13 wherein said insert is retained on said mold core by press fit.
15. The method set forth in claim 13 wherein said step (c) includes injection molding said plastic preform in said mold into a gap between said mold core and said insert to help retain said insert within said closed end of said preform.
16. The method set forth in claim 1 wherein said step (c) includes injection molding said plastic preform in said mold into a gap between said core and said insert to help retain said insert within said closed end of said preform.
17. The method set forth in claim 3 wherein said step (c) includes injection molding said plastic preform in said mold into a gap between said core and said insert to help retain said insert within said wall of said preform.
18. The method set forth in claim 6 wherein said step (c) includes injection molding said plastic preform in said mold into a gap between said core and said insert to help retain said insert within said closed end of said preform.
19. The method set forth in claim 7 wherein said step (c) includes injection molding said plastic preform in said mold into a gap between said core and said insert to help retain said insert within said wall of said preform.