Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUSRE35256 E
Publication typeGrant
Application numberUS 08/084,488
Publication dateMay 28, 1996
Filing dateJun 28, 1993
Priority dateJan 26, 1990
Fee statusPaid
Also published asDE69010477D1, DE69010477T2, EP0438721A2, EP0438721A3, EP0438721B1, US5040969
Publication number08084488, 084488, US RE35256 E, US RE35256E, US-E-RE35256, USRE35256 E, USRE35256E
InventorsStefan von Buren, Anton S. Paulovic
Original AssigneeHusky Injection Molding Systems Ltd.
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tandem injection molding machine with direct feed to molds
US RE35256 E
Abstract
An injection molding machine wherein a molding compound supply unit having a nozzle is moveable relative to a plurality of mold stations. Clamps are provided as an adjunct to the supply unit or as an adjunct to the mold stations for effecting a compound seal at each mold station. Appropriate power sources are provided for accomplishing the seal.
Images(4)
Previous page
Next page
Claims(16)
What is claimed is:
1. In an injection molding machine having a series of tandemly arranged molding stations wherein each molding station includes a mold having a parting line and a mold inlet,
said mold inlet defining a lateral extension of said mold,
said parting line extending into said mold inlet,
the improvement comprising:
moveable supply means for introducing moldable material into each said mold,
nozzle means carried by said supply means said nozzle means cooperating with each said mold inlet,
power means for moving said supply means operable to register said nozzle means with each said mold inlet,
nozzle clamp means moveable along each said parting line for sealing the nozzle means to a mating mold inlet, and
primary clamp means for sealing said parting line and said parting line extension along a first axis.
2. The machine of claim 1 wherein the nozzle means defines one nozzle operable to register with each mold inlet selectively and individually.
3. The machine of claim 1 wherein the nozzle clamp means is a fixture at each molding station.
4. The machine of claim 1 wherein the nozzle clamp means is carried by said supply means.
5. The machine of claim 1 wherein each mold inlet is disposed generally coaxially with and bisected by said parting line.
6. The machine of claim 5 wherein each mold inlet is a seamless extension of the mold.
7. The machine of claim 4 wherein the nozzle clamp means and an associated mold inlet make an interlocking connection.
8. The machine of claim 7 wherein the interlocking connection defines at least one claw and a cooperating slot.
9. The machine of claim 8 wherein the at least one claw is carried by said nozzle clamp means, and the slot is formed on each said mold inlet.
10. The machine of claim 9 wherein the at least one claw is fixed to said supply means and the slot is formed in said mold inlet.
11. The machine of claim 10 wherein the supply means includes nozzle clamp power means for placing the at least one claw and cooperating slot under tensile stress while pressing the nozzle means to a mating mold inlet to create a seal.
12. The machine of claim 11 wherein the nozzle means includes a valve means operable to seal the nozzle means when the nozzle means is in transit from one molding station to another molding station.
13. The molding machine of claim 1 including a secondary clamp means for clamping said nozzle means to a mold inlet wherein the secondary clamp means clamps along a second axis which is generally perpendicular to said first axis.
14. The machine of claim 2 wherein said nozzle clamp means includes power means individual to each mold station for pressing the nozzle means into sealing contact with a corresponding mold inlet.
15. In an injection molding machine having a series of tandemly arranged molding stations wherein each molding station includes a mold, a mold inlet and a hot runner, the improvement comprising:
a single platen common to a pair of adjacent mold stations,
a first hot runner communicating with a first mold inlet said first mold inlet disposed on one side of said platen,
a second hot runner communicating with a second mold inlet said second mold inlet disposed on an opposite side of said platen,
moveable supply means for introducing moldable material into each hot runner,
a nozzle carried by said supply means said nozzle being operable to connect with each hot runner, and
first and second nozzle clamps supported by said single platen, said first and second clamps being associated with a corresponding molding station for sealing said nozzle to said first and second hot runners selectively whereby moldable material is supplied to each mold inlet individually via respective hot runners. .Iadd.
16. In an injection molding machine having a series of tandemly arranged molding stations wherein each molding station includes a mold and a mold inlet, the improvement comprising:
moveable supply means for introducing moldable material into each said mold,
nozzle means carried by said supply means,
power means for moving said supply means operable to register said nozzle means with each said mold inlet,
nozzle clamp means for sealing the nozzle means against each mold inlet, and
said nozzle clamp means carried by said supply means forms a unitary assembly together with the nozzle means, said assembly being selectively positioned at one of said mold inlets. .Iaddend.
Description
BACKGROUND OF THE INVENTION

The present invention relates to injection molding machines having at least two molding stations arranged in tandem wherein a single moveable nozzle is employed to service each molding station in sequence.

SUMMARY OF THE INVENTION

It is a feature of the present invention to provide a source of moldable compound including a nozzle means where the nozzle is moveable, while in communication with the compound source, from station to station to introduce moldable compound into a mold located at the respective stations

A further feature of the invention is the provision of mold means having a parting line wherein the mold means includes a mold inlet means which is arranged coaxially with at least a portion of the mold parting line.

A further feature of the invention is the provision of a mold inlet means which is a seamless extension of the mold means.

A still further feature of the invention is the provision of means such as an extruder or like apparatus for advancing moldable material toward a molding station wherein a nozzle means is carried by supply means and the supply means and the nozzle means are moveable as a unitary assembly from station to station.

A further feature of the invention is the provision of primary clamping means for clamping molds along a longitudinal axis of the molding machine and a secondary clamping means for clamping the nozzle means directly to a mold (or to a hot runner manifold servicing a mold) along an axis that is generally perpendicular to the longitudinal axis.

It is a further feature of the invention wherein the secondary clamping means and the nozzle means are both carried by the supply means.

It is a further feature of the invention wherein a secondary clamping means is provided at each molding station.

A further feature of the invention is the provision of moveable platen disposed between two mold stations where the platen supports hot runner manifolds servicing molds at each station, and the platen includes secondary clamping means individual to each manifold for clamping a moveable nozzle to a manifold inlet.

An injection molding machine embracing certain principles of the present invention may comprise moveable supply means for introducing moldable material into said mold means, nozzle means carried by said supply means, power means for moving said supply means operable to register said nozzle means with each said mold inlet means, and nozzle clamp means (secondary clamp means) for sealing the nozzle means to mating mold inlet means.

A process embracing certain other principles of the invention and practiced by the operation of apparatus of the present invention may comprise the steps of combining a moldable material supply means, a single nozzle means and a clamp means into a unitary assembly and moving the assembly from station to station to seal the nozzle and to supply compound via said nozzle at each station in sequence.

The language "mold inlet means" includes a seamless extension of a mold or a .[.hOt.]. .Iadd.hot .Iaddend.runner manifold servicing a mold.

Other features and advantages of the present invention will become more apparent from an examination of the succeeding specification when read in connection with the appended drawings, in which;

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a side elevational view of a typical tandem arrangement of mold stations A and B.

FIG. 2 is a top plan view of the illustration of FIG. 1.

FIG. 3 is a fragmentary view of a portion of FIG. 2, enlarged for clarity.

FIG. 4 is a vertical section of FIG. 3 in the plane of line 4--4 as viewed in the direction of the arrows.

FIG. 5 is a top plane view, partially in section, showing an alternative embodiment of the present invention.

FIG. 6 is a sectional view of the showing of FIG. 5 as viewed in the plane of the line 6--6 and in the direction of the arrows, and;

FIG. 7 is a sectional view of FIG. 6 as viewed on the plane of line 7--7 and in the direction of the arrows.

DETAILED DESCRIPTION OF THE INVENTION

Referring in detail to FIGS. 1, 2, 3 and 4, a typical tandemly arranged injection molding machine 11 includes fixed platens 5 and 10, moveable platens 15 and 20 and two molding stations A and B, each having molds 12 and 13 opened, closed and clamped under control of primary clamping means (PC) in well known fashion. That is, both molds can be opened separately or individually and can be clamped separately or in unison depending upon the manner in which the primary clamping means is programmed.

Each mold means has an inlet means 14 and 16 which is an extension of the mold body and the inlet means is generally coaxial with the mold parting lines 17 and 18.

The inlet means disclosed is a seamless adjunct to the mold body; obviously the inlet means could be designed as a separate piece part fastened by appropriate means to the mold body.

Molding material is supplied to the mold stations A and B by a moveable molding material supply means 19, which in the present disclosure, is an extruder 21 having an attached nozzle means 22 and a nozzle valve 23.

The extruder, nozzle means and valves are moveable as an assembly, to and from mold station to mold station under control of a first power means P.

As indicated in greater detail in FIGS. 3 and 4, the extruder 21, its nozzle 22 and valve 23 are moveable into registration with a mold inlet means such as is illustrated in FIG. 3.

In the arrangement of FIGS. 3 and 4, the moveable assembly includes a nozzle clamp means 24 and nozzle clamp power means 26.

The nozzle clamp power means 26, secured to the nozzle means by a suitable fastener such as by bolts 27 and 28, comprises a piston-cylinder assembly supported in a body member .Iadd.29 .Iaddend.terminating in a pair of dogs or claws 31 and 32, operable to slide into and make an interlocking connection with mating slots 33 and 34 formed in the mold inlet means as is most apparent in FIG. 4.

When the extruder, nozzle, nozzle valve, nozzle clamp and nozzle clamp power means are moved as an assembly and are positioned in register with the nozzle inlet means as shown in FIG. 3 at Station A, the nozzle clamp power means 26 is energized to place the dogs 31 and 32 under a tensile stress as piston 36 bears down upon the nozzle 22 .[.t ęseal.]. .Iadd.to seal .Iaddend.the nozzle to the inlet means. Upon opening nozzle valve 23, moldable material is injected into the mold.

FIGS. 5, 6 and 7 show an alternative arrangement wherein a moveable platen 37, having opposed hot runner manifolds 38 and 39 supplying moldable material to molds at stations A and B, supports nozzle clamp means 41 and 42 individual to each mold station.

That is, in this arrangement the nozzle clamp means is separate from the molding material supply means and is fixed at each mold station.

Suitable power means such as piston-cylinder assemblies 43 and 44, under control of nozzle clamp control means S1 C1 are operable to seal nozzle means .Iadd.46 .Iaddend.to respective hot runner manifolds (mold inlet means) when the extruder 47 is moved into registry with each manifold inlet.

It is to be understood that the invention is not limited to the illustrations described and shown herein, which are deemed to be merely illustrative of the best modes of carrying out the invention, and which are susceptible of modification of form, size, arrangement of parts and details of operation. The invention rather is intended to encompass all such modifications which are within its spirit and scope as defined by the claims.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US4090836 *Apr 4, 1977May 23, 1978Fried. Krupp Gesellschaft Mit Beschrankter HaftungInjection die casting apparatus, especially for making molded parts of thermoplast-structural foam
US4124343 *Aug 16, 1976Nov 7, 1978The Goodyear Tire & Rubber CompanyInjection molding divers articles in selectably ordered sequence
US4242073 *May 4, 1978Dec 30, 1980Hitachi Shipbuilding & Engineering Co., Ltd.Injection molding apparatus and molding method with use of the apparatus
US4307057 *Jun 13, 1980Dec 22, 1981Siebolt HettingaMethod for aligning an injection mold with a nozzle at the mold injection station
US4734243 *Jul 25, 1986Mar 29, 1988Aisin Seiki Kabushiki KaishaInjection molding machine and method
US4867938 *Jan 29, 1988Sep 19, 1989Husky Injection Molding Systems, Ltd.Sequential injection molding process
EP0326175A2 *Jan 28, 1989Aug 2, 1989Husky Injection Molding Systems Ltd.Sequential injection molding machine
FR1325875A * Title not available
JPS4515144B1 * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7165968Jun 30, 2004Jan 23, 2007Husky Injection Molding Systems Ltd.Apparatus and method for sealing injection unit and sprue
US7559756Jul 14, 2009Husky Injection Molding Systems, Ltd.Apparatus and method for actuation of injection molding shooting pots
US7753671 *Jul 13, 2010Husky Injection Molding Systems Ltd.Mechanical fuse assembly of molding system
US7824596Mar 23, 2009Nov 2, 2010Husky Injection Molding Systems Ltd.Method for actuation of injection molding shooting pots
US7951321May 31, 2011Husky Injection Molding Systems Ltd.Method for actuation of injection molding shooting pots
US7998390Aug 16, 2011Mold-Masters (2007) LimitedMulti-material injection molding apparatus and method
US8328546Jun 29, 2010Dec 11, 2012Mold-Masters (2007) LimitedAuxiliary injection unit integrated in injection molding system
US8899965Jun 4, 2013Dec 2, 2014Mold Hotrunner Solitions Inc.Mold arrangement having a melt distribution manifold with a hinged joint
US20060001195 *Jun 30, 2004Jan 5, 2006Sicilia Roberto DApparatus and method for actuation of injection molding shooting pots
US20060003046 *Jun 30, 2004Jan 5, 2006Serniuck Nicholas WApparatus and method for sealing injection unit and sprue
US20060134253 *Jan 28, 2004Jun 22, 2006Gerhard EdlerInjection unit with a rotating valve for processing meltable materials
US20080199559 *Feb 21, 2007Aug 21, 2008Husky Injection Molding Systems Ltd.Mechanical Fuse Assembly of Molding System
US20090179345 *Mar 23, 2009Jul 16, 2009Husky Injection Molding Systems Ltd.Apparatus and method for actuation of injection molding shooting pots
US20090179346 *Mar 23, 2009Jul 16, 2009Husky Injection Molding Systems Ltd.Apparatus and method for actuation of injection molding shooting pots
US20090256282 *Apr 14, 2009Oct 15, 2009George OlaruMulti-Material Injection Molding Apparatus and Method
Classifications
U.S. Classification425/572, 264/328.8, 425/581, 425/589, 264/328.11, 425/574
International ClassificationB29C45/20, B29C45/76, B29C45/32, B29C45/07, B29C45/12
Cooperative ClassificationB29C45/076, B29C45/322, B29C45/1777, B29C45/12
European ClassificationB29C45/32B, B29C45/12, B29C45/07B
Legal Events
DateCodeEventDescription
Feb 9, 1999FPAYFee payment
Year of fee payment: 8
Dec 20, 2002FPAYFee payment
Year of fee payment: 12
Jan 30, 2008ASAssignment
Owner name: ROYAL BANK OF CANADA, CANADA
Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495
Effective date: 20071213
Owner name: ROYAL BANK OF CANADA, CANADA
Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495
Effective date: 20071213
Owner name: ROYAL BANK OF CANADA, CANADA
Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495
Effective date: 20071213
Owner name: ROYAL BANK OF CANADA, CANADA
Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495
Effective date: 20071213
Owner name: ROYAL BANK OF CANADA,CANADA
Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495
Effective date: 20071213
Owner name: ROYAL BANK OF CANADA,CANADA
Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495
Effective date: 20071213
Owner name: ROYAL BANK OF CANADA, CANADA
Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495
Effective date: 20071213
Owner name: ROYAL BANK OF CANADA, CANADA
Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495
Effective date: 20071213
Owner name: ROYAL BANK OF CANADA, CANADA
Free format text: SECURITY AGREEMENT;ASSIGNOR:HUSKY INJECTION MOLDING SYSTEMS LTD.;REEL/FRAME:020431/0495
Effective date: 20071213
Jul 19, 2011ASAssignment
Owner name: HUSKY INJECTION MOLDING SYSTEMS LTD., CANADA
Free format text: RELEASE OF SECURITY AGREEMENT;ASSIGNOR:ROYAL BANK OF CANADA;REEL/FRAME:026647/0595
Effective date: 20110630
Owner name: HUSKY INJECTION MOLDING SYSTEMS LTD., CANADA
Free format text: RELEASE OF SECURITY AGREEMENT;ASSIGNOR:ROYAL BANK OF CANADA;REEL/FRAME:026647/0595
Effective date: 20110630