# US 4,381,908 A · Mold apparatus for forming profile employing reinforcing preform

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- Number: US 4,381,908 A
- Document ID: US4381908A
- Status: Granted
- Kind: A
- Application number: 06/240,708
- Filed: 1981-03-05
- Granted: 1983-05-03
- Earliest claimed: 1976-06-25
- Assignees: Werkzeugbau Wolfgruben GmbH
- Inventors: Manfred Roth
- Web page: https://patentgrep.com/patent/US4381908A

## CPC

- B29C 44/12: Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C 33/123: {for centering the inserts}
- B29C 37/0082: {Mechanical anchoring (B29C66/303 takes precedence)}
- B29C 70/72: Encapsulating inserts having non-encapsulated projections, e.g. extremities or terminal portions of electrical components {(B29C70/742 takes precedence)}
- E06B 3/205: {moulded or extruded around a core}
- B29K 2075/00: Use of {PU, i.e.} polyureas or polyurethanes {or derivatives thereof}, as moulding material
- B29K 2705/02: Aluminium
- B29L 2031/005: {for making window frames (windows B29L2031/778)}
- Y10S 264/83: Injection molding of polyolefin-type foam
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- E06B: FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES (shades or blinds for greenhouses A01G9/22; curtains A47H; lids for car boots or bonnets B62D25/10; skylights E04B7/18; sunshades, awnings E04F10/00)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

A form box for manufacturing a form, which form box is adapted to hold a reinforcing preform in position during the period of time that an expanding foam mass is injected into the area between the reinforcing preform and the form box. Pins are secured to the form box and project inwardly into the form cavity in which is located the reinforcing preform. The free ends of the pins engage the reinforcing preform to hold same in a fixed position during the period of time that the expanding foam mass is injected into the cavity between the reinforcing preform and the form box.

## Claims

### Claim 1

A horizontally elongated mold having horizontally elongated upper and lower mold parts with a parting plane therebetween for permitting vertical separation between the parts, said parts having cooperating wall means which, when the parts are closed, define a profiled mold cavity which is elongated in the elongated direction of the mold, said wall means including upper and lower walls on said upper and lower parts respectively, a plurality of preform support means mounted on said mold parts at selected fixing points along said elongated direction and projecting into said mold cavity for permitting an elongated reinforcing preform to be fixedly supported within said cavity in spaced relationship to said wall means, said preform support means including first and second pin means fixed to said lower part and projecting substantially vertically upwardly from said bottom wall into said mold cavity, said first and second pin means being laterally spaced apart and defining thereon upper surfaces adapted to supportingly engage a lower surface on the preform, said first and second pin means also defining a pair of oppositely directed side surfaces adapted to respectively engage opposed oppositely directed side shoulders on the preform for preventing transverse movement of the preform relative to the mold, said preform support means also including third pin means fixed to said upper part and projecting substantially vertically downwardly from said upper wall into said mold cavity, said third pin means having a lower surface adapted to supportingly engage an upper surface on the preform for vertically confining the preform between said first, second and third pin means.

### Claim 2 (depends on 1)

A mold according to claim 1, wherein said third pin means, relative to the horizontal lateral direction, is positioned between said first and second pin means.

### Claim 3 (depends on 2)

A mold according to claim 2, wherein said third pin means is positioned approximately midway between said first and second pin means relative to said horizontal lateral direction.

### Claim 4 (depends on 1, 2, 3)

A mold according to any one of claims 1-3, wherein said first, second and third pin means as associated with each said support means are disposed substantially within a single transverse plane which is parallel to the separation direction between the upper and lower mold parts.

### Claim 5 (depends on 1)

A mold according to claim 1, wherein the first, second and third pin means have portions thereof which are disposed within the mold cavity, which said portions are of a converging conical configuration as they project toward the free ends thereof.