Pinch-formed blow molded bracket off the parting line

Patent metadata

Field	Value
Publication number	US-10688709-B2
Application number	US-201615277410-A
Country	US
Kind code	B2
Filing date	Sep 27, 2016
Priority date	Feb 15, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

Blow molded plastic components are disclosed having integrally formed brackets, formed together with the component in the molding step. A method of blow molding is disclosed for integrally forming brackets onto a blow molded component. More specifically, the disclosures relates to a blow molded plastic component having a bracket formed integrally in the blow molding process and configured to rotate onto and lockably engage undercut features or lugs formed integrally on the outer surface of the blow molded component, all features formed during the molding process.

First claim

What is claimed is:

1. A method of manufacturing a hollow molded plastic component, comprising the steps of:
providing a mold having at least two mold halves that, when closed together, meet at a parting line and defining a mold cavity:
the mold cavity defining an outer surface of the hollow molded plastic component;
the mold cavity defining at least one undercut feature or lug integrally formed on the outer surface of the hollow molded plastic component;
the mold cavity defining a bracket formed on a parting line of the mold and extending radially outwardly at the parting line away from the hollow molded plastic component;
blow molding the hollow molded component in the mold cavity, the hollow molded component, the at least one undercut feature or lug and the bracket all formed in the mold in the blow molding step at the same time, all blow molded together at the same time in the same mold, forming together in one blow molding step a one piece singular blow molded plastic component;
opening the at least two mold halves;
at least partially removing the one piece singular blow molded plastic component from the mold;
rotating the bracket about the parting line to lockably engage the bracket with the at least one undercut feature or lug to lockable secure the bracket onto the outer surface of the hollow molded plastic component;

wherein the rotating step is practiced before the hollow molded plastic component has cooled;
wherein, after the rotating step, the method includes cooling the hollow molded plastic component to complete the securing of the bracket onto the at least one undercut feature or lug.

2. A method of manufacturing a hollow molded plastic component, comprising the steps of:
providing a mold having at least two mold halves that, when closed together, meet at a parting line and defining a mold cavity:
the mold cavity defining an outer surface of the hollow molded plastic component;
the mold cavity defining at least one undercut feature or lug integrally formed on the outer surface of the hollow molded plastic component;
the mold cavity defining a bracket formed on a parting line of the mold and extending radially outwardly at the parting line away from the hollow molded plastic component;
blow molding the hollow molded component in the mold cavity, the hollow molded component, the at least one undercut feature or lug and the bracket all formed in the mold in the blow molding step at the same time, all blow molded together at the same time in the same mold, forming together in one blow molding step a one piece singular blow molded plastic component;
opening the at least two mold halves;
at least partially removing the one piece singular blow molded plastic component from the mold;
rotating the bracket about the parting line to lockably engage the bracket with the at least one undercut feature or lug to lockable secure the bracket onto the outer surface of the hollow molded plastic component;
wherein in the blow molding step, the bracket includes a mounting portion having at least one mounting hole, the mounting portion and at least one hole configured and adapted for supportably mounting the hollow molded plastic component onto another component.

3. The method according to claim 2 , wherein
in the blow molding step, the bracket is formed to have a flexible living hinge, the living hinge formed between and connecting the bracket and the outer side of the hollow blow molded plastic component, the flexible living hinge formed as linear groove of thinned material in the bracket;
wherein in the blow molding step, the bracket is formed to have a generally rectangular window, the generally rectangular window having two lateral edges arranged on opposing sides of the rectangle;
wherein, in the rotating step, the two lateral edges lockably engage with the at least one undercut feature or lug;
wherein the lateral edges extend in a direction substantially perpendicular to the flexible living hinge.

Assignees

• Mann & Hummel Gmbh

Inventors

• Olson Bradley

Classifications

• B29C49/70

  Removing or ejecting blown articles from the mould · CPC title

• B29C49/6427

  Cooling of preforms · CPC title

• F16L9/12

  of plastics with or without reinforcement (F16L9/16 - F16L9/22 take precedence) · CPC title

• B29D23/001

  Pipes; Pipe joints (pleated hoses B29D23/18) · CPC title

• F02M35/10321

  Plastics; Composites; Rubbers · CPC title