Integrated structural member for a vehicle and method of making

• US 7,731,261 B2
• Filed: 03/21/2007
• Issued: 06/08/2010
• Est. Priority Date: 12/10/2002
• Status: Expired due to Fees

• Current Assignee: Inteva Products LLC (Renco Group Incorporated)
• Original Assignee: Inteva Products LLC (Renco Group Incorporated)
• Inventors: Kowalski, Gregory J., Bertucci, Joseph A., Wenzel, Edward J., Widin, Ronald, Van Jaarsveld, Robert
• Primary Examiner(s): LYJAK, LORI LYNN
• Application Number:
  US11/689,205
• Publication Number:
  US 20070210616A1
• Time in Patent Office: 1,175 Days
• Field of Search: 296/187.03, 296/190.09, 296/208, 296/70, 180/90, 280/752, 280/751, 454/121, 454/127, 454/143
• US Class Current: 296/70
• CPC Class Codes: B29C 45/006 Joining parts moulded in separate cavities
• CPC Class Codes: B29C 45/14065 Positioning or centering articles in the mould
• CPC Class Codes: B29C 45/14418 Sealing means between mould and article
• CPC Class Codes: B29C 45/14467 Joining articles or parts of a single article B29C45/14377, B29C45/14385, B29C45/14581, B29C45/14614 and B29C45/006 take precedence
• CPC Class Codes: B29L 2031/3008 Instrument panels
• CPC Class Codes: B60H 1/0055 the housing or parts thereof being integrated in other devices, e.g. dashboard
• CPC Class Codes: B62D 25/142 having ventilation channels incorporated therein
• CPC Class Codes: B62D 25/145 having a crossbeam incorporated therein
• CPC Class Codes: B62D 29/001 characterised by combining metal and synthetic material
• CPC Class Codes: B62D 29/004 the metal being over-moulded by the synthetic material, e.g. in a mould
• CPC Class Codes: B62D 29/005 preformed metal and synthetic material elements being joined together, e.g. by adhesives
• CPC Class Codes: B62D 29/043 Superstructures B62D25/161 takes precedence

Abstract

A method for forming an integrated structural system for a vehicle is provided. The method including the steps of: securing a first beam component to a structural member by a molding process, the first beam component being molded from a first amount of thermoplastic material, the structural member being formed from a material different than the first amount of thermoplastic material; and securing a second beam component to the first beam component, the second beam component being separately molded from a second amount of thermoplastic material, the second beam component having a configuration different from the first beam component.

Claims

1. A method for forming an integrated structural system for a vehicle, the method comprising:

securing a first beam component to a structural member by a molding process, the first beam component being molded from a thermoplastic material directly molded to the structural member, the structural member being formed from a material different than the thermoplastic material of the first beam component; and

securing a second beam component to the first beam component after the first beam component is secured to the structural member, the second beam component being separately molded from a thermoplastic material, the second beam component having a configuration different from the first beam component.

2. The method as in claim 1, wherein the second beam component is secured to the first beam component by one of the following methods:

vibration welding;

adhesive bonding;

heat staking;

mechanical fastening;

or a combination thereof and the first beam component and the second beam component form fluid pathways of a heating ventilating and air-conditioning system.

3. The method as in claim 1, wherein the structural member is formed from steel and has a first structural member and a second structural member, the first structural member being configured to have higher mechanical properties than the second structural member, and the first structural member is secured to the second structural member prior to the first beam component being secured to the structural member.

4. The method as in claim 3, wherein the first structural member is secured to the second structural member by a deformation resistance welding process and the mass of the first structural member is greater than the mass of the second structural member.

5. The method as in claim 1, further comprising attaching a first bracket and a second bracket to the structural member prior to the first beam component being secured to the structural member, the first bracket and second bracket being configured to secure the structural member to a portion of the vehicle.

6. The method as in claim 5, wherein the first bracket and second bracket are secured to the structural member by one of the following methods:

deformation resistance welding;

arc welding;

laser welding;

adhesive bonding;

mechanical fastening;

or a combination thereof and the first bracket and the second bracket each have an opening.

7. The method as in claim 6, further comprising inserting a locating pin into the opening on either the first bracket and the second bracket, the locating pin positions the structural member in a desired position prior to the first beam component being secured to the structural member.

8. The method as in claim 1, further comprising:

minimizing the mass of the structural component by forming the structural member from a first structural member and a second structural member, the first structural member being configured to have higher mechanical properties than the second structural member, and the first structural member is secured to the second structural member prior to the first beam component being secured to the structural member and the first structural member is positioned at a drivers side of the vehicle and the first beam component includes a housing portion configured to define a portion of an airbag module.

9. The method as in claim 8, wherein the housing portion further comprises a bracket mounted to the housing portion, the bracket being configured to secure an inflator to the housing portion and the bracket is secured to the structural member by a fastening means.

10. The method as in claim 9, wherein the first beam component further comprises a steering column support bracket.

11. The method as in claim 9, wherein an energy absorbing mechanism is secured to the structural member.

12. The method as in claim 8, wherein the housing portion is structurally reinforced by at least one of the following:

a plurality of structural ribs;

a continuous fiber prepreg fabric;

a stamped metal bracket;

an extruded metal bracket;

or a combination thereof for reinforcing a localized area of the housing portion.

13. The method as in claim 1, wherein the second beam component defines a plurality of fluid pathways for a heating ventilating air-conditioning system.

14. The method as in claim 1, further comprising creating a plurality of mounting surfaces on the structural member by preventing the thermoplastic material of the first beam component from being molded on portions of the structural member.

15. The method as in claim 1, further comprising disposing a plurality of sealing pads on the structural member by a spring loaded mechanism prior to the first beam component being molded to the structural member, the plurality of sealing pads being configured to prevent the thermoplastic material of the first beam component from covering portions of the structural member.

16. The method as in claim 1, wherein the molding process for securing the first beam component to the structural member is at least one of the following:

extrusion compression, extrusion deposit compression;

injection molding;

blow molding;

or a combination thereof.

17. An integrated structural system formed by the method of claim 1.

34. The method as in claim 1, wherein the structural member is formed from any one of the following materials;

steel, aluminum, titanium, thermoplastic or thermoset composites or combination thereof.

18. A method for forming an integrated structural system for a vehicle, the method comprising:

forming a structural member by securing a first structural member to a second structural member, the first structural member having higher mechanical properties than the second structural member;

inserting the structural member into a mold cavity;

securing a first beam component to the structural member by a molding process, the first beam component being molded from a thermoplastic material inserted into the mold cavity;

removing the structural member from the mold cavity; and

securing a second beam component to the first beam component, the second beam component being separately molded from a thermoplastic material, the second beam component having a configuration different from the first beam component.

19. The method as in claim 18, further comprising attaching a first bracket and a second bracket to the structural member prior to the first beam component being secured to the structural member, the first bracket and second bracket each having an opening, and the first bracket and second bracket being configured to secure the structural member to a portion of the vehicle.

20. The method as in claim 19, further comprising inserting a locating pin into the opening on the first bracket and second bracket, the locating pin being configured to position the structural member in a desired position within the mold cavity prior to the first beam component being secured to the structural member.

21. The method as in claim 18, wherein the second beam component is secured to the first beam component by one of the following methods:

vibration welding;

adhesive bonding;

heat staking;

mechanical fastening;

or a combination thereof.

22. The method as in claim 19, wherein the first bracket and second bracket are attached to the structural member by one of the following methods:

deformation resistance welding;

arc welding;

laser welding;

adhesive bonding;

mechanical fastening;

or a combination thereof and the first structural member and second structural member are formed from steel and the first structural member is secured to the second structural member by one of the following methods;

deformation resistance welding;

arc welding;

adhesive bonding;

mechanical fastening;

or a combination thereof.

23. The method as in claim 18, wherein the first beam component includes a housing portion configured to define a portion of an airbag module, the housing portion having a bracket mounted to the housing portion, the bracket being configured to secure an inflator to the housing portion and an energy absorbing mechanism secured to the structural member, the bracket and the energy absorbing mechanism each being secured to the structural member by at least one bolt that passes through a portion of the structural member.

24. The method as in claim 23, wherein the housing portion is structurally reinforced by at least one of the following:

a plurality of ribs;

a continuous fiber prepreg fabric;

a stamped metal bracket;

extruded metal bracket;

or a combination thereof for reinforcing a localized area of the housing portion and the second beam component defines a plurality of fluid pathways for a heating ventilating and air-conditioning system.

25. The method as in claim 18, further comprising creating a plurality of mounting surfaces on the structural member by preventing the thermoplastic material of the first beam component from being disposed on portions of the structural member.

26. The method as in claim 18, further comprising disposing a plurality of sealing pads on the structural member by a spring loaded mechanism prior to the first beam component being secured to the structural member, the plurality of sealing pads being configured to prevent the thermoplastic material of the first beam component from covering portions of the structural member and the molding process for securing the first beam component to the structural member is at least one of the following:

extrusion compression, extrusion deposit compression;

injection molding;

blow molding;

or a combination thereof.

27. An integrated structural system for a vehicle, comprising:

a structural member;

a first beam component secured to the structural member by a molding process, the first beam component being molded from a thermoplastic material; and

a second beam component secured to the first beam component after the first beam component is molded to the structural member, the second beam component being separately molded from a thermoplastic material, and the second beam component having a configuration different from the first beam component.

28. The integrated structural system as in claim 27, further comprising a first bracket and a second bracket attached to the structural member, the first bracket and second bracket being configured to secure the structural member to a portion of the vehicle and the first bracket and the second bracket each have an opening the opening on the first bracket and second bracket being configured to receive a locating pin for positioning the structural member in a desired position when the first beam component is secured to the structural member.

29. The integrated structural system as in claim 27, wherein the structural member includes a first structural member and a second structural member secured together, the first structural member and second structural member being formed from steel, and the first structural member being configured to have higher mechanical properties than the second structural member.

30. The integrated structural system as in claim 27, wherein the first beam component includes a housing portion configured to define a portion of an airbag module and the housing portion further comprises at least one of the following:

a plurality of ribs;

a continuous fiber prepreg fabric;

a stamped metal bracket;

extruded metal bracket;

or a combination thereof for reinforcing a localized area of the housing portion.

31. The integrated structural system as in claim 27, wherein the first beam component includes a housing portion configured to define a portion of an airbag module and the structural system further comprises an inflator bracket secured to the housing portion, the inflator bracket being secured to the structural member by a fastener that passes through the structural member and also secures an energy absorbing bracket to the structural member.

32. The integrated structural system as in claim 27, wherein the second beam component defines a plurality of fluid pathways for a heating ventilating and air-conditioning system and the integrated structural system comprises a plurality of mounting surfaces created on the structural member.

33. A method for forming an integrated structural system for a vehicle, the method comprising:

securing a first beam component to a structural member by a molding process, the first beam component being molded from a thermoplastic material, the structural member being formed from the same material as the first beam component; and

securing a second beam component to the first beam component, the second beam component being separately molded from a thermoplastic material, the second beam component having a configuration different from the first beam component.