Multi-component mold with rotatable mandrels

• US 6,821,100 B2
• Filed: 09/06/2002
• Issued: 11/23/2004
• Est. Priority Date: 09/06/2002
• Status: Active Grant

• Current Assignee: Caco Pacific Corporation
• Original Assignee: Caco Pacific Corporation
• Inventors: Geibel, Martel B. Jr., Kroeger, Charles
• Primary Examiner(s): HEITBRINK, JILL LYNNE
• Application Number:
  US10/236,499
• Publication Number:
  US 20040047933A1
• Time in Patent Office: 809 Days
• Field of Search: 425/112, 425/121, 425/126.1, 425/556, 425/576, 425/577, 425/588
• US Class Current: 425/112
• CPC Class Codes: B29C 2045/1629 turrets with incorporated ejection means
• CPC Class Codes: B29C 33/0022 Multi-cavity moulds B29C33/301 takes precedence
• CPC Class Codes: B29C 33/444 for stripping articles from a mould core, e.g. using stripper plates
• CPC Class Codes: B29C 45/045 mounted on the circumference of a rotating support having a rotating axis perpendicular to the mould opening, closing or clamping direction
• CPC Class Codes: B29C 45/1628 using a mould carrier rotatable about an axis perpendicular to the opening and closing axis of the moulding stations
• CPC Class Codes: B29C 45/261 having tubular mould cavities
• CPC Class Codes: B29C 45/2681 with rotatable mould parts

Abstract

A mold apparatus for making multi-component products includes (i) a rotatable turret with a plurality of product connector pairs attached to opposite sides of the turret, (ii) a first mold disposed proximate to the turret and (iii) a second mold disposed on the opposite side of the turret. The first mold has a plurality of cavities for molding a first molded layer of the multi-component product, and the second mold has a plurality of cavities for molding a second layer onto the first molded layer. Each product connector is rotatable about its longitudinal axis to allow the mold apparatus to make multi-component products having first molded layers and second molded layers with indentations and/or protuberances disposed in a variety of orientations.

Claims

1. An apparatus for making products, each of which products comprises a first molded portion and a second molded portion, the first molded portion having an external surface and an internal surface, the apparatus comprising:

(a) an elongate turret having a front side, an opposed rear side and a longitudinal axis;

(b) a plurality of elongate product connector pairs, each product connector pair comprising a longitudinal axis, each product connector pair further comprising a forward product connector on the front side of the turret and a rearward product connector on the rear side of the turret, the forward product connector and the rearward product connector being disposed in a plane substantially perpendicular to the longitudinal axis of the turret, each of the product connectors being rotatable about its longitudinal axis, the amount of rotation being between about 10° and

about 360°

;

(c) at least one bearing for permitting the rotation of the turret;

(d) a first mold disposed proximate to the turret, the first mold defining a plurality of first mold cavities, each first mold cavity being aligned with a product connector on the turret and each first mold cavity being sized and dimensioned to shape the exterior surface of the first molded portion of the product, the first mold being separable along a first mold separation plane which bisects each of the first mold cavities within the first mold; and

(e) a second mold disposed proximate to the turret and opposite the turret from the first mold, the second mold defining a plurality of second mold cavities, each second mold cavity being aligned with a product connector on the turret and each second mold cavity being sized and dimensioned to shape the exterior surface of the second molded portion of the product, the second mold being separable along a second mold separation plane which bisects each of the second mold cavities within the second mold.

2. The apparatus of claim 1 wherein the product connectors are mandrels sized and dimensioned to shape the interior surface of the first molded portion, each mandrel being disposed perpendicular to the longitudinal axis of the turret.

3. The apparatus of claim 1 wherein each product connector is rotatable in an amount between about 30°

and 270°

.

4. The apparatus of claim 1 wherein each product connector is rotatable in an amount between about 60°

and 120°

.

5. The apparatus of claim 1 wherein each product connector is rotatable in an amount between about 85°

and 95°

.

6. The apparatus of claim 1 further comprising a single opening and closing mechanism for opening and closing both the first mold and the second mold contemporaneously, and wherein the first mold separation plane and the second mold separation plane are identical.

7. The apparatus of claim 1 wherein the turret comprises a pair of elongate push rods slidably disposed within the turret and extending external of one end of the turret, wherein one end of each push rod is disposed in abutment with a cam ring disposed external to the turret, the cam ring having a raised portion and a depressed portion, and wherein each of the product connectors is linked to one of the push rods by a link member such that the sliding movement of each push rod rotates each product connector about the longitudinal axis of the product connector.

8. The apparatus of claim 1 wherein the turret comprises a body having opposed side walls and a pair of stripper plates disposed on opposite sides of the body, each of the stripper plates having a plurality of stripper plate apertures, each of the product connectors being affixed to the body and extending through a stripper plate aperture, each stripper plate being movable between a retracted stripper plate position wherein the stripper plate is proximal to the body and an extended stripper plate position wherein the stripper plate is distal from the body, each stripper plate having at least one stripper plate attachment member, the apparatus further comprising:

at least one stripper plate extender member disposed separate from the turret, the at least one stripper plate extender member being attachable to the at least one stripper plate attachment member on each of the stripper plates, the at least one stripper plate extender member being movable between a first stripper plate extender member position wherein the at least one stripper plate extender member is proximal to the turret and a second stripper plate extender member position wherein the at least one stripper plate extender member is distal from the turret, the at least one stripper plate extender member being alternatively attachable to and detachable from the at least one stripper plate attachment member on each of the two stripper plates,

so that, the at least one stripper plate extender member can be (i) moved from the first stripper plate extender member position to the second stripper plate extender member position, (ii) attached to the at least one stripper plate attachment member on one of the two stripper plates, (iii) moved from the second stripper plate extender member position to the first stripper plate extender member position, thereby moving the one of the two stripper plates from the retracted stripper plate position to the extended stripper plate position, (iv) moved from the first stripper plate extender member position to the second stripper plate extender member position, thereby moving the one of the two stripper plates from the extended stripper plate position to the retracted stripper plate position, (v) detached from the at least one stripper plate attachment member, and (vi) returned to the first stripper plate extender member position.

9. The apparatus of claim 8 wherein the apparatus comprises a pair of opposed stripper plate extender members.

10. The apparatus of claim 8 wherein the at least one stripper plate extender member comprises a hooking flange.

11. An apparatus for making products, each of which products comprises a first molded portion and a second molded portion, the first molded portion having an external surface and an internal surface, the apparatus comprising:

(a) an elongate turret having a front side, an opposed rear side and a longitudinal axis;

(b) a plurality of mandrel pairs, each mandrel in each mandrel pair comprising a longitudinal axis, each mandrel pair further comprising a forward mandrel on the front side of the turret and a rearward mandrel on the rear side of the turret, the forward mandrel and the rearward mandrel being disposed in a plane substantially perpendicular to the longitudinal axis of the turret, each of the mandrels being rotatable about its longitudinal axis, the amount of rotation being between about 10° and

about 360°

;

(c) at least one bearing for permitting the rotation of the turret;

(d) a first mold disposed proximate to the turret, the first mold defining a plurality of first mold cavities, each first mold cavity being aligned with a mandrel on the turret and each first mold cavity being sized and dimensioned to shape the exterior surface of the first molded portion of the product,the first mold being separable along a first mold separation plane which bisects each of the first mold cavities within the first mold;

(e) a second mold disposed proximate to the turret and opposite the turret from the first mold, the second mold defining a plurality of second mold cavities, each second mold cavity being aligned with a mandrel on the turret and each second mold cavity being sized and dimensioned to shape the exterior surface of the second molded portion of the product, the second mold being separable along a second mold separation plane which bisects each of the second mold cavities within the second mold, the second mold separation plane being identical to the first mold separation plane; and

(f) a single opening and closing mechanism for opening and closing both the first mold and the second mold contemporaneously.

12. The apparatus of claim 11 wherein each mandrel is rotatable in an amount between about 30°

and 270°

.

13. The apparatus of claim 11 wherein each mandrel is rotatable in an amount between about 60°

and 120°

.

14. The apparatus of claim 11 wherein each mandrel is rotatable in an amount between about 85°

and 95°

.

15. The apparatus of claim 11 wherein the turret comprises a pair of elongate push rods slidably disposed within the turret and extending external of one end of the turret, wherein one end of each push rod is disposed in abutment with a cam ring disposed external to the turret, the cam ring having a raised portion and a depressed portion, and wherein each of the mandrels is linked to one of the push rods by a link member such that the sliding movement of each push rod rotates each mandrel about the longitudinal axis of the mandrel.

16. The apparatus of claim 11 wherein the turret comprises a body having opposed side walls and a pair of stripper plates disposed on opposite sides of the body, each of the stripper plates having a plurality of stripper plate apertures, each of the mandrels being affixed to the body and extending through a stripper plate aperture, each stripper plate being movable between a retracted stripper plate position wherein the stripper plate is proximal to the body and an extended stripper plate position wherein the stripper plate is distal from the body, each stripper plate having at least one stripper plate attachment member, the apparatus further comprising:

at least one stripper plate extender member disposed separate from the turret, the at least one stripper plate extender member being attachable to the at least one stripper plate attachment member on each of the stripper plates, the at least one stripper plate extender member being movable between a first stripper plate extender member position wherein the at least one stripper plate extender member is proximal to the turret and a second stripper plate extender member position wherein the at least one stripper plate extender member is distal from the turret, the at least one stripper plate extender member being alternatively attachable to and detachable from the at least one stripper plate attachment member on each of the two stripper plates,

so that, the at least one stripper plate extender member can be (i) moved from the first stripper plate extender member position to the second stripper plate extender member position, (ii) attached to the at least one stripper plate attachment member on one of the two stripper plates, (iii) moved from the second stripper plate extender member position to the first stripper plate extender member position, thereby moving the one of the two stripper plates from the retracted stripper plate position to the extended stripper plate position, (iv) moved from the first stripper plate extender member position to the second stripper plate extender member position, thereby moving the one of the two stripper plates from the extended stripper plate position to the retracted stripper plate position, (v) detached from the at least one stripper plate attachment member, and (vi) returned to the first stripper plate extender member position.

17. The apparatus of claim 16 wherein the apparatus comprises a pair of opposed stripper plate extender members.

18. The apparatus of claim 16 wherein the at least one stripper plate extender member comprises a hooking flange.