Mold having an offset parting line for manufacturing containers having increased stability

Patent metadata

Field	Value
Publication number	US-9833941-B2
Application number	US-201414768259-A
Country	US
Kind code	B2
Filing date	Apr 8, 2014
Priority date	Apr 12, 2013
Publication date	Dec 5, 2017
Grant date	Dec 5, 2017

Abstract

A mold ( 11 ) for manufacturing a container ( 2 ) having a body ( 4 ) and a bottom ( 6 ), including: an annular peripheral base ( 8 ) defining a positioning plane ( 9 ); an arch ( 10 ) which extends concavely toward the inside of the container ( 2 ) from the base ( 8 ), the mold ( 11 ) including: a wall ( 12 ) having an inner surface ( 13 ) forming the cavity of the body ( 4 ) of the container ( 2 ) and having an opening therethrough, the wall ( 12 ) having an edge ( 23 ) forming the cavity of the positioning plane ( 9 ); a mold bottom ( 14 ) which is moveably mounted relative to the wall ( 12 ), the mold bottom ( 14 ) having an upper surface ( 15 ) forming the cavity of the arch ( 10 ), and a skirt ( 19 ) having an outer radial extension that is strictly lower than an inner radial extension of the positioning plane ( 9 ).

First claim

The invention claimed is:

1. Mold ( 11 ) for the manufacturing, starting from a parison ( 3 ), of a container ( 2 ) having a body ( 4 ) and a bottom ( 6 ) in the lengthening of the body ( 4 ) at a lower end of the body ( 4 ), the bottom ( 6 ) comprising:
an annular peripheral base ( 8 ) defining a standing plane ( 9 ) that extends essentially perpendicular to the body ( 4 ) from a lower end of the body ( 4 ), with the standing plane ( 9 ) being delimited on the inside by an inner edge ( 24 );
an arch ( 10 ) that extends recessed toward the inside of the container ( 2 ) from the base ( 8 ),
this mold ( 11 ) comprising:
a wall ( 12 ) having an inner surface ( 13 ) that constitutes the impression of the body ( 4 ) of the container ( 2 ) and that delimits a cavity ( 16 ), with this wall ( 12 ) being pierced, at a lower end, by an opening ( 17 );
a mold bottom ( 14 ) having an upper surface ( 15 ) that constitutes the impression of at least the arch ( 10 ), and a skirt ( 19 ) that extends axially from the upper surface ( 15 ) opposite the opening ( 17 ), with the mold bottom ( 14 ) being mounted to move in relation to the wall ( 12 ) between an extended position, in which the upper surface ( 15 ) is separated from the opening ( 17 ), toward the outside of the cavity ( 16 ), and a retracted position, in which the upper surface ( 15 ) blocks the cavity ( 16 );
the wall ( 12 ) has a flange ( 23 ) that constitutes the impression of the standing plane ( 9 ), which extends in the lengthening of the inner surface ( 13 ), essentially perpendicular to the latter;
with this mold ( 11 ) being characterized in that the flange ( 23 ) ends, toward the

inside, in an annular rib ( 29 ) that borders the opening and that is formed projecting toward the inside of the cavity ( 16 ).

2. Mold ( 11 ) according to claim 1 , wherein the upper surface ( 15 ) of the mold bottom ( 14 ) has, at its junction with the skirt ( 19 ), an outer edge ( 20 ) that, in the retracted position of the mold bottom ( 14 ), extends on a level with an upper face ( 30 ) of the rib ( 29 ).

3. Mold ( 11 ) according to claim 2 , wherein the rib ( 29 ) has a thickness, measured radially, that is less than or equal to half the width of the flange ( 23 ).

4. Mold ( 11 ) according to claim 2 , wherein the rib ( 29 ) has a thickness, measured radially, that is less than or equal to one-third of a width of the flange ( 23 ).

5. Mold ( 11 ) according to claim 2 wherein the rib ( 29 ) has a thickness, measured radially, that is less than or equal to one-fifth of a width of the flange ( 23 ).

6. Mold ( 11 ) according to claim 2 , wherein the rib ( 29 ) has a thickness that is less than or equal to approximately 1 mm.

7. Mold ( 11 ) according to claim 2 , wherein the rib ( 29 ) has a height, measured axially, that is less than or equal to 1 mm.

8. Mold ( 11 ) according to claim 1 , wherein the rib ( 29 ) has a thickness, measured radially, that is less than or equal to half the width of the flange ( 23 ).

9. Mold ( 11 ) according to claim 1 , wherein the rib ( 29 ) has a thickness, measured radially, that is less than or equal to one-third of a width of the flange ( 23 ).

10. Mold ( 11 ) according to claim 1 , wherein the rib ( 29 ) has a thickness, measured radially, that is less than or equal to one-fifth of a width of the flange ( 23 ).

11. Mold ( 11 ) according to claim 1 , wherein the rib ( 29 ) has a thickness that is less than or equal to approximately 1 mm.

12. Mold ( 11 ) according to claim 11 , wherein the rib ( 29 ) has a thickness of approximately 0.5 mm.

13. Mold ( 11 ) according to claim 1 , wherein the rib ( 29 ) has a height, measured axially, that is less than or equal to 1 mm.

14. Mold ( 11 ) according to claim 13 , wherein the rib ( 29 ) has a height of approximately 0.5 mm.

15. Process for manufacturing a container ( 2 ) from a parison ( 3 ), with this process comprising the operations that consist in:
inserting the parison ( 3 ) into a mold according to claim 1 , with the mold bottom ( 14 ) being in an extended position,
blow-molding the container ( 2 ) by injecting a pressurized gas into the parison,
during the blow molding, moving the mold bottom ( 14 ) toward its retracted position.

Assignees

• Sidel Participations

Inventors

• Penet Laurent
• Protais Pierrick
• Boukobza Michel

Classifications

• B29C49/06

  Injection blow-moulding · CPC title

• B29C2049/4892

  Mould halves consisting of an independent main and bottom part · CPC title

• B29C49/4268 Primary

  Auxiliary operations during the blow-moulding operation · CPC title

• B29L2031/7158

  Bottles · CPC title

• B29C49/12 Primary

  Stretching rods · CPC title