US 6,156,258 AGranted

Injection blow molding machine, injection blow molding method and injection molding machine

AssigneeNissei Asb Machine Co., Ltd.

InventorsMinoru Takada, Koichi Sato, Atsushi Sakurai, Yoichi Netsu, Yoichi Tsuchiya

Life of this patent

Estimating the term…

Loading patent…

Abstract

An injection blow molding system includes an injection molding station 22, a first delivery section 24, a cooling station 26, a heating station 30, a second delivery section 32 and a plurality of blow molding stations 34. The injection molding station 22 is designed to simultaneously injection mold M rows of N preforms 36 arranged in a second direction B perpendicular to a first direction A in which the preforms 36 are carried. The first delivery section 24 is designed to remove the M rows of preforms 36 injection molded by the injection molding station 22 through a removing mechanism 102 in their upright state while decreasing the pitch in the rows. The preforms 36 are inverted with the column pitch being changed by an inverting mechanism 104 before they are delivered to the cooling station in their inverted state. The cooling and heating stations 26, 30 are designed to cool and heat one row of N preforms 36 while parallel carrying them along a first carrying chain 200. The second delivery section 32 is designed to deliver the preforms 36 to two blow molding stations while they are maintained in their inverted state. Each of the blow molding stations 34 is designed to stretch blow mold the N/2 preforms into containers at the same time.

Claims19

Dependent claims

An injection blow molding system comprising:

an injection molding station for injection molding preforms;
a cooling station for cooling said preforms while carrying said preforms in a first direction;
a first delivering section for receiving said preforms from said injection molding station and delivering said preforms to said cooling station;
a heating station for heating said preforms cooled by said cooling station while carrying said preforms in said first direction;
a plurality of blow molding stations for stretch blow molding said preforms into containers;
and
a second delivering section for receiving said preforms from said heating station and delivering said preforms to said blow molding stations;
wherein:
said injection molding station has an injection mold for simultaneously injection molding said preforms in a state of upright, when said preforms are arranged in a M.times.N (M.gtoreq.2, N .gtoreq.2) matrix having M rows extending parallel to a second direction which is perpendicular to said first direction and N columns in each row;
said first delivering section has a removing mechanism for removing said M.times.N matrix of said preforms in a state of upright out of said injection molding station, and an inverting mechanism for inverting said preforms to deliver to said cooling station;
said cooling station and said heating station have a first carrying path in common for intermittently carrying one row of N preforms at a time in a state of inversion;
said second delivering section has a transfer mechanism for receiving said one row of N preforms heated by said heating station from said first carrying path to transfer to said blow molding stations in a state of inversion;
and
each of said blow molding stations includes:
a second carrying path having a substantially rectangular shape with two shorter sides and two longer sides;
a receiving section located on one of said shorter sides in said second carrying path for receiving said preforms from said second delivering section in a state of inversion;
a blow molding section located on one of said longer sides in said second carrying path for simultaneously stretch blow molding said preforms received by said receiving section into containers;
and
a removing section located on the other shorter side opposite to said receiving section for removing said containers molded by said blow molding section.

16 more elements

An injection blow molding system comprising:

an injection molding station for injection molding preforms in a state of upright;
a carrying path for carrying said preforms in a first direction;
a delivering section for receiving said preforms from said injection molding station and delivering said preforms to said carrying path;
a heating station located on said carrying path for heating said preforms while carrying to a temperature equal to or higher than a proper stretching temperature;
and
at least one blow molding station for stretch blow molding said preforms heated by said heating station into containers;
wherein:
said injection molding station includes:
an injection mold having upper and lower mold portions for simultaneously injection molding said preforms in a state of upright, when said preforms are arranged in a M.times.N matrix (M.gtoreq.2, N.gtoreq.2) having M rows extending parallel to a second direction which is perpendicular to said first direction and N columns in each row;
an upper mold clamping plate on which said upper mold portion is mounted;
a lower mold clamping plate on which said lower mold portion is mounted;
and
a clamping plate driving mechanism for moving said upper mold clamping plate in a vertical direction;
said carrying path includes carrying members arranged in parallel to carry one row of N preforms at a time;
and
said delivering section includes:
M rows of removing plates each of which moves between said upper and lower mold portions in said injection molding station to receive N preforms;
and
a removing mechanism which makes said M rows of removing plates advance toward and retreat from said injection molding station to remove said M.times.N preforms, and which has a pitch changing mechanism for increasing a row pitch in said M rows of removing plates when advancing and for decreasing said row pitch when retreating.

16 more elements

An injection blow molding system comprising:

an injection molding station for injection molding preforms in a state of upright;
a first carrying path for carrying said preforms in a first direction;
a first delivering section which includes a removing mechanism for removing said preforms from said injection molding station and a delivering mechanism for delivering said removed preforms to said first carrying path;
a heating station located on said first carrying path for heating said preforms while carrying to a temperature equal to or higher than a proper stretching temperature;
and
at least one blow molding station for stretch blow molding said preforms heated by said heating station into containers;
wherein:
said injection molding station includes:
an injection mold having upper and lower mold portions for simultaneously injection molding said preforms in a state of upright, when said preforms are arranged in a M.times.N matrix (M.gtoreq.2, N.gtoreq.2) having M rows extending parallel to a second direction which is perpendicular to said first direction and N columns in each row;
an upper mold clamping plate on which said upper mold portion is mounted;
a lower mold clamping plate on which said lower mold portion is mounted;
and
a clamping plate driving mechanism which has four tie-bars to move said upper mold clamping plate in a vertical direction;
said first carrying path includes carrying members arranged in parallel to carry said one row of N preforms at a time in a state of inversion;
and
said removing mechanism of said first delivering section includes:
at least one removing plate which advances toward and retreat from said injection molding station to receive said preforms;
and
a plurality of removing rails which conducts said at least one removing plate at its opposite ends into between said upper and lower mold clamping plates;
said removing rails are fixedly mounted between said lower mold portion and said four tie-bars, and extends from said injection molding station toward said first delivering section.

17 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/051,956Filed 4 Sep 1998
Priority: JP 8-2509062 Sep 1996
Granted: 5 Dec 2000
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

B29C 49/42122
Changing the center-center distance: adapting to blow-mould cavity center-center distance
B29C 45/42
Removing or ejecting moulded articles: using means movable from outside the mould between mould parts , e.g. robots
B29C 49/28
Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor: blow-moulding apparatus
B29C 49/4205
Component parts, details or accessories; Auxiliary operations: handling means, e.g. transfer, loading or discharging means