Method of forming articles of manufacture of various shapes including undercuts therein with generic tool

• US 5,928,599 A
• Filed: 06/01/1995
• Issued: 07/27/1999
• Est. Priority Date: 06/01/1995
• Status: Expired due to Fees

• Current Assignee: Batesville Services Incorporated (Hillenbrand Incorporated)
• Original Assignee: Batesville Services Incorporated (Hillenbrand Incorporated)
• Inventors: Rojdev, Ilija, Laphan, Dennis C.
• Primary Examiner(s): Timm, Catherine
• Application Number:
  US08/456,813
• Time in Patent Office: 1,517 Days
• Field of Search: 264/511, 264/516, 264/547, 264/553, 264/554, 264/259, 264/271.1, 264/274, 425/503, 425/504, 425/182, 156/285, 27/7, 27/3
• US Class Current: 264/516
• CPC Class Codes: A61G 17/0136 Plastic material
• CPC Class Codes: B29C 2791/006 Using vacuum
• CPC Class Codes: B29C 51/10 Forming by pressure difference, e.g. vacuum
• CPC Class Codes: B29C 51/12 of articles having inserts or reinforcements

Abstract

A method of forming an article of manufacture which includes an undercut therein comprises the steps of providing a tool, removably positioning at least one consumable form adjacent to the tool, providing settable material from which to mold a finished part, molding the material onto the tool and on the form so as to encapsulate the form within the material to thereby form an undercut therein, allowing the material to set to form the finished part and separating the tool from the finished part and the encapsulated form. A method is also provided for forming articles of manufacture of various configurations utilizing a single generic tool by repeating the steps with differently shaped forms removably affixed to the single generic tool in different locations to produce a plurality of finished parts of varying configurations with the single generic tool.

Claims

1. A method of forming a casket including an undercut therein comprising the steps of:

providing a male tool in the size and shape of a casket to be formed;

removably positioning at least one consumable form at the periphery of the tool;

providing a sheet of a settable material from which to mold the casket;

molding the material on the tool including on the form by vacuum forming the sheet so as to shape the sheet around the form and the tool to thereby form an undercut in the sheet;

allowing the molded material to set to form the casket; and

separating the tool from the casket and the form;

the form thereby creating the appearance of casket shell trim molding.

2. The method of claim 1 wherein the settable material is plastic.

3. The method of claim 1 wherein the settable material is a composite.

4. The method of claim 1 wherein the form includes fasteners premounted thereon whereby hardware may be attached to the form fasteners after molding the material onto the tool and form.

5. The method of claim 1 wherein the form is colored and the material is translucent whereby the color of the form is visible through the translucent material.

6. The method of claim 1 wherein the form is textured whereby the texture of the form is visible through the material.

7. A method of forming a casket including a skeletal structural framework therein comprising the steps of:

providing a male tool in the size and shape of a casket to be formed;

removably positioning at least one consumable form at the periphery of the tool;

providing a sheet of a settable material from which to mold the casket;

molding the material on the tool including on the form by vacuum forming the sheet so as to shape the sheet around the form and the tool to thereby create a peripheral skeletal structural framework in the sheet;

allowing the molded material to set to form the casket; and

separating the tool from the casket and the form.

8. The method of claim 7 wherein the settable material is plastic.

9. The method of claim 7 wherein the settable material is a composite.

10. The method of claim 8 wherein the form includes fasteners premounted thereon whereby hardware may be attached to the form after molding the material onto the tool and form.

11. The method of claim 8 wherein the form is colored and the material is translucent whereby the color of the form is visible through the translucent material.

12. The method of claim 7 wherein the form is textured whereby the texture of the form is visible through the material.

13. A method of forming caskets of various configurations utilizing a single generic tool comprising the steps of:

providing a single generic male tool in the size and shape of a casket to be formed;

removably positioning at least one consumable form at the periphery of the tool;

providing a sheet of settable material from which to mold the casket;

molding the material on the tool including on the form by vacuum forming the sheet so as to shape the sheet around the form and the tool to thereby define a specific configuration for the casket;

allowing the molded material to set to form the casket;

separating the tool from the casket and the form; and

repeating the above steps with differently shaped forms removably positioned at the periphery of the single generic tool to produce a plurality of caskets of varying configurations with the single generic tool;

wherein the method produces at least one of;

a) the form thereby creating the appearance of casket shell trim molding and b) the form thereby creating a peripheral skeletal structural framework in the sheet.

14. The method of claim 13 wherein the settable material is plastic.

15. The method of claim 13 wherein the settable material is a composite.

16. The method of claim 13 wherein the form includes fasteners premounted thereon whereby hardware may be attached to the form fasteners after molding the material onto the tool and form.

17. The method of claim 13 wherein the form is colored and the material is translucent whereby the color of the form is visible through the translucent material.

18. The method of claim 13 wherein the form is textured whereby the texture of the form is visible through the material.

19. A method of vacuum molding a plastic casket comprising the steps of:

providing a rectangular male tool generally in the size and shape of a casket;

removably positioning consumable forms around the periphery of the tool adjacent to the tool;

providing a plastic sheet from which to mold the plastic casket;

heating the plastic sheet to soften the sheet;

vacuum molding the plastic sheet on the tool including on the forms so as to shape the sheet around the forms and the tool;

allowing the molded sheet to set to form the casket; and

separating the tool from the casket and the forms;

the forms thereby creating the appearance of casket shell top molding and base molding.

20. The method of claim 19 wherein the tool has side, end and bottom walls and wherein the form has a generally L-shape cross-section having a foot and a leg, and wherein the foot of the form is supported against the bottom of the tool.

21. A method of vacuum molding a plastic casket comprising the steps of:

providing a rectangular male tool having side, end and bottom walls and generally in the size and shape of a casket;

removably positioning consumable forms adjacent to the tool around the periphery of the tool;

providing a plastic sheet from which to mold the plastic casket;

supporting the sheet in a rectangular frame;

applying heat to the sheet to soften the sheet;

moving the frame over the tool so as to move the sheet adjacent the tool side, end and bottom walls;

applying vacuum between the sheet and tool so as to vacuum mold the sheet on the tool including on the forms so as to shape the sheet around the forms and the tool;

allowing the molded sheet to set to form the casket; and

removing the casket and forms from the tool;

the forms thereby creating the appearance of casket shell top molding and base molding.

22. The method of claim 21 wherein the forms are hollow and further comprising the step of injecting structural foam into the forms thereby creating a unitized form structure about the periphery of the casket.

23. A method of forming a casket comprising the steps of:

providing a tool in the size and shape of a casket to be formed;

removably positioning at least one consumable form adjacent to the tool;

providing a blank of a settable material from which to mold the casket;

molding the material on the tool including on the form so as to capture the form within the material;

allowing the molded material to set to form the casket; and

separating the tool from the casket and the form;

wherein the form is colored and the material is translucent whereby the color of the form is visible through the translucent material.

24. A method of forming a casket comprising the steps of:

providing a tool in the size and shape of a casket to be formed;

removably positioning at least one consumable form adjacent to the tool;

providing a blank of a settable material from which to mold the casket;

molding the material on the tool including on the form so as to capture the form within the material;

allowing the molded material to set to form the casket; and

separating the tool from the casket and the form;

wherein the form includes fasteners premounted thereon whereby hardware may be attached to the form fasteners after the molded material has set.

25. A method of forming a casket comprising the steps of:

providing a tool in the size and shape of a casket to be formed;

removably positioning at least one consumable form adjacent to the tool;

providing a blank of a settable material from which to mold the casket;

molding the material on the tool including on the form so as to capture the form within the material;

allowing the molded material to set to form the casket; and

separating the tool from the casket and the form;

wherein the form is textured whereby the texture of the form is visible through the material.

26. A method of forming a casket comprising the steps of:

providing a tool in the size and shape of a casket to be formed;

removably positioning at least one consumable form adjacent to the tool;

providing a blank of a settable material from which to mold the casket;

molding the material on the tool including on the form so as to capture the form within the material;

allowing the molded material to set to form the casket; and

separating the tool from the casket and the form;

wherein the form is hollow and further comprising the step of injecting structural foam into the form thereby creating a unitized form structure about the periphery of the casket.