NOZZLE-TIP INSULATOR HAVING CONCENTRIC VOID FORMATION
TECHNICAL FIELD
AII a5pect of the pre5e11t i~lve~ltigoe~nle rally relate5 to (but i5 not limited to) a ~lozzle-tipi1 15ulator
having a body defining a void formation that are coaxially co~lce~ltricalplyo 5itio11ed relative to each
other.
BACKGROUND
The fir5t mall-made pla5tic wa5 i~lve~lteidn Britain in 185 1 by Alexander PARKES. He publicly
demo115trated it at the 1862 Illter~latio~laEl xhibition in Lo11do11, calling the material Parke5ine.
Derived from cellulo5e, Parke5ine could be heated, molded, and retain it5 5hape when cooled. It
15 wa5, however, expe115ive to produce, prone to cracking, and highly flammable. I11 1868, American
i~lve~ltoJro hn We5ley HYATT developed a pla5tic material he named Celluloid, improving on
PARKES' i~lve~ltio50~ lt hat it could be proce55ed into fini5hed form. HYATT patented the fir5t
i11jectio11 molding machine in 1872. It worked like a large hypodermic needle, u5i1lg a plunger to
inject pla5tic through a heated cylinder into a mold. The i1ldu5try expa~lded rapidly in the 19405
20 becau5e World War I1 created a huge demand for i11expe115ive, ma55-produced product5. I11 1946,
American i~lve~ltoJarm e5 Wat5o11 HENDRY built the fir5t ~ r e wi11 jectio11m achine. Thi5 machine
a150 allowed material to be mixed before i~ljectio~50~ ,t hat colored or recycled pla5tic could be
added to virgin material and mixed thoroughly before being injected. I11 the 19705, HENDRY went
on to develop the fir^ ga\-a\5i5ted i11jectio11 molding proce55.
25
Illjectio~l molding machine5 co115i5t of a material hopper, an i11jectio11 ram or 5crew-type plunger,
and a heating unit. They are a150 k11ow11 a5 pre55e5, they hold the mold5 in which the compo11e11t5
are 5haped. Pre55e5 are rated by tonnage, which expre55e5 the amount of clamping force that the
machine can exert. Thi5 force keep5 the mold clo5ed duri~lgth e i11jectio11p roce55. Tonnage can vary
30 from le55 than five to115 to 6000 to115, with the higher figure5 u5ed in comparatively few
ma~lufacturi~logp eratio115. The total clamp force needed i5 determined by the projected area of the
part being molded. Thi5 projected area i5 multiplied by a clamp force of from two to eight to115 for
each quare inch of the projected area\. A5 a rule of thumb, four or five to115 per quare inch can be
u5ed for mo5t product5. If the pla5tic material i5 very \tiff, it will require more i~ljectiop~rle 55ure to
35 fill the mold, thu5 more clamp tonnage to hold the mold clo5ed. The required force can a150 be
determined by the material u5ed and the 5ize of the part, larger part5 require higher clamping force.
WO 20111127596 PCTlCA20111050160
With Irljectio~M~o lding, granular plastic is fed by gravity from a hopper into a heated barrel. As the
gra~lules are slowly moved forward by a screw-type plu~lger, the plastic is forced into a heated
chamber, where it is melted. As the plu~lgera dvances, the melted plastic is forced through a nozzle
that rests against the mold, allowing it to enter the mold cavity through a gate and runner system.
5 The mold remains cold so the plastic solidifies almost as so011 as the mold is filled. Mold assembly
or die are terms used to describe the tooling used to produce plastic parts in molding. The mold
assembly is used in mass productio~w~h ere thousa~ldso f parts are produced. Molds are typically
co~lstructed from hardened steel, etc. Hot-ru111ler systems are used in molding systems, along with
mold assemblies, for the ma~lufacture of plastic articles. Usually, hot-ru1111ers systems and mold
10 assemblies are treated as tools that may be sold and supplied separately from molding systems.
SUMMARY
The i1lve1ltor5 have re5earched a problem a55ociated with k11ow11 molding 5y5tem5 that i~ladverte~ltly
15 ma~lufacture bad-quality molded article5 or part5. After much 5tudy, the i1lve1ltor5 believe they have
arrived at an ~11lder5ta1ldi1logf the problem and it5 5olutio11, which are 5tated below, and the
i1lve1ltor5b elieve thi5 ~11lder5ta1ldi1il5g n ot kllow11t o the public.
Accordi~lg to one a\pect, there i5 provided a ~lozzle-tip i115ulator, compri5ing: a ~lozzle-contact
20 5urface; a mold-gate contact 5urface being off5et from the ~lozzle-contact 5urface; and a body
co~l~lectit~hleg ~ lozzle-contact5 urface with the mold-gate contact 5urface, the body being re5iliently
compre55ible, the body defining a void, and the body and the void being coaxially co~lce~ltrically
po5itio1led relative to each other.
25 Other a5pect5 and feature5 of the II~II-limitinge mbodime1lt5 will now become apparent to tho5e
5killed in the art up011 review of the followi~lgd etailed de5criptio11o f the II~II-limitingem bodiment5
with the accompa~lyi~dlgra wing5.
DETAILED DESCRIPTION OF 'THE DRAWINGS
The ~lo~~-limiteim~blgod ime~ltsw ill be more fully appreciated by reference to the followi~lgd etailed
descriptio~lo f the ~lo~~-limiteim~lbgo dime~ltsw hen take11 in co~lju~lctiwoi~th~ t he accompa~lyi~lg
drawings, in which:
35 FIGS. 1A and 1B depict ~hematic repre5e1ltatio115 of a mold-tool a55ernbly (2) of a molding
machine (1) u5i1lg a ~lozzle-tipi1 15ulator (100);
FIGS. 2A-8A depict variou5 ~hematicre pre5e1ltatio115( that i5, cro55-5ectio1lal view5) of the nozzletip
i115ulator (100) of FIG 1; and
5 FIGS. 2B-8B depict5 variou5 ~hematicre pre5e1ltatio115( that i5, per5pective view5) of the ~lozzle-tip
i115ulator (100) of FIG 1, which corre5po1ld with FIGS. 2A-8A, re5pectively.
The drawing5 are not 1lece55arily to ~ a l aend may be illu5trated by phantom lille5, diagrammatic
repre5e1ltatio115 and fragmentary view5. I11 certain i115ta1lce5, detail5 not 1lece55ary for an
10 ~11lder5ta1ldi1olfg the embodime1lt5 (a~ldlodr etail5 that render other detail5 difficult to perceive) may
have been omitted.
15 FIGS. 1A and 1B depict5 the ~hematic repre5e1ltatio115 of the mold-tool a55embly (2) of the
molding machine (1) u5i1lg the ~lozzle-tipi 115ulator (100). A5 depicted in FIG. lB, the molding
machine (1) generally i11clude5 a 5tationary platen and a movable platen, and the mold-tool a55embly
(2) i5 5upported between the plate115. A5 depicted in FIG. lB, the mold-tool a55embly (2) i11clude5
(but i5 not limited to): a 5tem actuator (4), a ma~lifold a55embly (6), a 5tem (8), a nozzle a55embly
20 (116), a mold-gate a55embly (118), and the ~lozzle-tipi1 15ulator (100). The mold-tool a55embly (2)
(which may a150 be called a hot-ru1111er 5y5tem or a runner 5y5tem), the molding machine (1) (5uch
a5 an injection-molding machine), and the ~lozzle-tipi1 15ulator (100) all may i~lcludec ompo1le1lt5
that are k11ow11t o per50115 5killed in the art, and the5e kllow11c ompo1le1lt5w ill not be de~ribedh ere;
the5e k11ow11 compo1le1lt5 are de5cribed, at lea5t in part, in the followi~lg reference book5 (for
25 example): (i) "lrziectiorz Moldirz,~ H~~rzdl7ook" authored by OSSWALDITURNGIGRAMANN
(ISBN: 3-446-2 1669-2), (ii) "lr~i~ctioMrzo lclira~H ~~rzdl7ooka"u thored by ROSATO AND ROSATO
(ISBN: 0-41 2-9938 1-3), (iii) "lr?iectiorz Moldirag Sv~tenzs" 31d Edition authored by JOHANNABER
(ISBN 3-446-17733-7) andlor (iv) "R~lruzer arzd Gatirz,~ L>e,ri,qrz H~~rzdl7ook" authored by
BEAUMONT (ISBN 1-446-22672-9). It will be appreciated that for the purpo5e5 of thi5 docume~lt,
30 the phra5e "i1lclude5 (but i5 not limited to)" i5 equivale~lt to the word "compri5i1lg". The word
"compri5ing" i5 a tra115itio11al phra5e or word that link5 the preamble of a patent claim to the 5pecific
element5 5et forth in the claim which define what the i~lve~ltioit5~ell f actually i5. The tra115itio1lal
phra5e act5 a5 a limitation on the claim, i~ldicati~wlgh ether a 5imilar device, method, or compo5itio11
i~lfri~lgtehse patent if the accused device (etc) co~ltai~mlso re or fewer elements than the claim in the
35 patent. The word "comprisi~lg"i s to be treated as an open tra~lsitiow~~hi,c h is the broadest form of
tra~lsitioa~s~ i,t does not limit the preamble to whatever elements are identified in the claim.
Referring now to FIGS. 2A and 2B, there i5 depicted an example of the ~lozzle-tipi1 15ulator (100).
Generally, the ~lozzle-tipi1 15ulator (100) i11clude5 (but i5 not limited to): (i) a ~lozzle-contac5t urface
(102), (ii) a mold-gate contact 5urface (104), and (iii) a body (106). The ~lozzle-contact 5urface
5 (102) i5 u5ed to contact a nozzle a55embly (116). The mold-gate contact 5urface (104) i5 off5et from
the ~lozzle-contac5t urface (102). The mold-gate contact 5urface (104) i5 u5ed to contact a mold-gate
a55embly (118). The body (106) co111lect5 the ~lozzle-contact 5urface (102) with the mold-gate
contact 5urface (104). The body (106) i5 re5iliently compre55ible. The body (106) define5 a void
formation (108). The body (106) and the void formation (108) are coaxially co~lce~ltrically
10 po5itio1led relative to each other. The void formation (108) permit5 the body (106) to u~liformly
re5iliently compre55 in re5po115e to tra115mi55io11 of a load (110) fi-om the ~lozzle-contact 5urface
(102) to the mold-gate contact 5urface (104). It i5 ~11lder5toodth at the void formation (108) reduce5
tra115mi55io11 of the load (110) from the ~lozzle-contact 5urface (102) to the mold-gate contact
5ul-face (104). Specifically, the void formation reduce5 the load (110) being tra115mitted from the
15 ~lozzle-contact 5urface (102) to the mold-gate 5urface (104). The body (106) define5 a (centrallylocated)
orifice (120), which allow5 melt or re5i11 or molding material to flow from the nozzle
a55embly (116) to the mold-gate a55embly (118) and ultimately to a mold cavity of a mold a55embly
m know^^, not depicted). The meaning of "re5ilie1lce" a5 follow5: the phy5ical property of a material
that can return to it5 original 5hape or po5itio11 after deformation that doe5 not exceed it5 ela5tic
20 limit. The meaning of "compre55iblefl i5 a5 follow5: an object that i5 capable of being compre55ed or
made more compact; the property of being able to occupy le55 5pace. The meaning of "co~lce~ltric"
i5 a5 follow5: having or 5hari1lg a common center; co~lce~ltroicb ject5 5hare the 5ame center, axi5 or
origin with one imide the other. Co~lce~ltriocb ject5 do not 1lece55arily have the 5ame radiu5. The
meaning of "coaxially" i5 a5 follow5: object5 that may have or 5hare a common central axi5; object5
25 that each have their ow11 central axi5 but the5e axe5 are parallel to each other. The meaning of
"u~liformly" i5 a5 follow5: the 5ame throughout or di5tributed evenly through an object.
FIGS. 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B depict the ca\e where the ~lozzle-tipi1 15ulator (100) i5 adapted
50 that the void formation (108) i11clude5 an a1111~11~1\-5hapgeadp (112) that i5 formed by the body
30 (106).
FIGS. 2A, 2B, 3A, 3B depict the ca5e where the ~lozzle-tipi1 15ulator (100) i5 adapted to that the
a1111~11~15-5hapgeadp (112) i5 formed on the mold-gate contact 5urface (104). The a1111~11~1\-5hagpeadp
(112) may be called a co~lce~ltrgicro ove (or a 5et of co~lce~ltrgicro ove5).
35
FIGS. 2A, 2B depict5 the a1111~11~15-5hapgeadp (112) formed on an out5ide conical 5urface, which i5
WO 20111127596 PCTlCA20111050160
called the mold-gate contact 5urface (104), of the ~lozzle-tipin 5ulator (100). It will be appreciated that
the a1111~11~15-5hapgeadp (112) may a150 be formed on the mold-gate contact 5urface (104). It will a150
be appreciated that the a11nulu5-5haped gap (112) may a150 be formed on the mold-gate contact
5ul-face (104) and the ~lozzle-contact 5urface (102). The mold-gate contact 5urface (104) i5 tapered.
5 For FIGS. 2A, 2B, the objective i5 to decrea5e the 5urface contact on the mold-gate contact 5urface
(104) of the ~lozzle-tipi1 15ulator (100) by providing a relief on the mold-gate contact 5urface (104) by
which contact with mold-gate a55embly (118) to the ~lozzle-tipi1 15ulator (100) may be reduced on the
mold-gate contact 5urface (104). Surface to 5urface contact i5 limited to II~II-relived5 urface5 where
more of the load (110) will be acting thereon. Hence thi5 arrangement may lead to reduce an amount
lo of the load (110) acting on the ~lozzle-tip i115ulator (100) in turn to the mold-gate contact 5urface
(104).
FIGS. 3A and 3B depict the ca5e where the void formation (108) i11clude5 two gap5 (112) formed on
the mold-gate contact 5urface (104), in which one of the gap5 (112) i5 formed clo5er to the orifice
15 (120) while the other gap (112) i5 formed proximate midway between the orifice (120) and the
peripheral edge of the ~lozzle-tipi1 15ulator (100). The gap5 (112) form a corrugated tapered 5urface on
the mold-gate contact 5urface (104). For thi5 arrangement, the objective i5 to decrea5e the 5urface
contact on the mold-gate contact 5urface (104) of the ~lozzle-tip i115ulator (100) by making a
corrugated 5urface on the mold-gate contact 5urface (104) of the ~lozzle-tipi1 15ulator (100) there may
20 be a cre5t and trough, which a5 a relief on the mold-gate contact 5urface (104) by which contact with
the mold-gate a55embly (118) and the ~lozzle-tip i115ulator (100) may be reduced. Hence thi5
arrangement may lead to reduce the load acting on the ~lozzle-tipi1 15ulator (100) in turn to the moldgate
a55embly (118).
25 FIGS. 4A, 4B, 5A, 5B depict the ca5e where the ~lozzle-tipi1 15ulator (100) i5 further adapted 50 that
the a1111~11~15-5hagpeadp (112) i5 formed on the ~lozzle-contact5 urface (102).
FIGS. 4A, 4B depict the ~lozzle-tipi1 15ulator (100) that i5 arranged 50 that the objective i5 to decrea5e
the 5urface contact on the ~lozzle-contact5 urface (102), which i5 tapered, by providing a relief formed
30 on the ~lozzle-contact5 urface (102) by which contact with the nozzle a55embly (116) to the ~lozzle-tip
i115ulator (100) via the ~lozzle-contact 5urface (102) may be reduced. Surface to 5urface contact i5
limited in thi5 ca5e to on II~II-relived 5ul-face5 where more load may act thereon. Hence thi5
arrangement may lead to reduce the load acting on the ~lozzle-tipi1 15ulator (100) in turn to the moldgate
a55embly (118).
35
FIGS. 5A and 5B depict the co~lce~ltrically-placead1 111ular gap5 (112) on the ~lozzle-contact5 urface
WO 20111127596 PCTlCA20111050160
(102), which form a corrugated tapered relief on the ~lozzle-contact 5urface (102). I11 thi5 ca\e, the
objective i5 to decrea5e the 5urface contact on the ~lozzle-contact 5ul-face (102) of the ~lozzle-tip
i115ulator (100) by making or forming a corrugated relief on the ~lozzle-contact 5ul-face (102). There
may be a cre5t-a1ld-trough relief. The relief i5 formed on the ~lozzle-contact 5urface (102) by which
5 contact with the nozzle a55embly (116) to the nozzle-tip i115ulator (100) may be reduced. Hence thi5
arrangement may reduce the load acting on the ~lozzle-tipi1 15ulator (100).
FIGS. 6A, 6B depict5 the ca5e where the void formation (108) i11clude5 a pattern of pa55-through
hole5 (114) that are formed by the body (106). The pattern of pa55-through hole5 (114) may be
10 axially-aligned through hole5 (that i5, axially aligned with the orifice (120), or the pattern of pa55-
through hole5 (114) may be aligned perpe~ldicular to the ~lozzle-contact 5ul-face (102) or the moldgate
contact 5urface (104). The pattern of pa55-through hole5 (114) are a collectio~lo f blind hole5
a~ldlotrh rough hole5 that are evenly dijtributed arou~ldth e orifice (120) with their axe5 parallel to the
axi5 of the orifice (120). Preferably, the pattern of pa55-through hole5 (114) extend5 from the nozzle-
15 contact 5ul-face (102) to the mold-gate contact 5urface (104).
FIG. 7 depict5 the ca5e where the void formation (108) i5 defined between the body (106) and a
nozzle a55embly (116). Specifically, the ~lozzle-contact 5urface (102) contact5 the nozzle a55embly
(116) at an inner peripheral edge of an orifice (120) centrally defined through the body (106), 50 that
20 the void formation (108) i5 defined between the body (106) and a nozzle a55embly (116). Different
angle5 on the ~lozzle-contact 5ul-face (102) andlor the mold-gate contact 5urface (104) are different
than the corre5po11di11g adjacent mating part75 5urface angle. Thi5 arrangement call5 for i1lcrea5ed
(internal) i~lcluded angle. I11 thi5 ca\e, the objective i5 to decrea5e the 5urface contact on the nozzlecontact
5ul-face (102) by i~lcrea\i~ltghe internal i~lcludeda ngle of the ~lozzle-tipi 115ulator (loo)),
25 which make5 point contact with the nozzle a55embly (116) proximate to the orifice (120). Hence thi5
arrangement may lead to reduce the load acting on the ~lozzle-tipi1 15ulator (100) in turn to the moldgate
a55embly (118).
FIG. 8 depict5 the ca5e where the void formation (108) i5 defined between the body (106) and a mold-
30 gate a55embly (118). Specifically, the mold-gate contact 5urface (104) contact5 the mold-gate
a55embly (118) at an outer peripheral edge of an orifice (120) centrally defined through the body
(106), and the void formation (108) i5 defined between the body (106) and mold-gate a55embly (118).
Thi5 arrangement call5 for an i1lcrea5ed i~lcludeda ngle on the mold-gate contact 5urface (104); it will
be appreciated that the increa5ed i~lcludeda ngle may be arranged on both the ~lozzle-contact5 urface
35 (102) and the mold-gate contact 5urface (104). For thi5 arrangement, the objective i5 to decrea5e the
entire 5urface contact5 on the ~lozzle-contact5 urface (102) andlor the mold-gate contact 5urface (104)
WO 20111127596 PCTlCA20111050160
by i~lcrea\i~tlhge i~lcludeda ngle5 (both internal and external) of the ~lozzle-tipi1 15ulator (loo), which
make5 le55 contact with the nozzle a55embly (116) and the mold-gate a55embly (118). Hence thi5 may
lead to reduce the load acting on the ~lozzle-tip i115ulator (100) in turn to the mold-gate a55embly
(118).
5
Several technical effect5 may be realized by u5i1lg the foregoing arra1lgeme1lt5: the 5tiffIle55 of the
~lozzle-tipi1 15ulator (100) may be co~ltrolledb y acIjju\ti~lgth e geometry of the groove5, a~ldlora dding
groove5 on the ~lozzle-contact 5urface (102) and the mold-gate contact 5urface (104) and thu5
control axial reaction force5 that the ~lozzle-tip in5ulator (100) may tra115mit5 to the mold-gate
10 a55embly (118), thereby reduci~lg the wear to the mold-gate a55embly (118) and to the nozzle
a55embly (116). I11 additio~l~e5, 5 force tra115mitted through the mold-tool a55embly (2) may reduce
plate bowing. The arrangement de5cribed above may reduce the force tra115mitted to the mold-gate
a55embly (118), and 50 by forming groove5 in the ~lozzle-contact 5urface (102) and the mold-gate
contact 5urface (104) of the ~lozzle-tipi1 15ulator (loo), the ~lozzle-tipi1 15ulator (100) ma become le55
15 5tiff and therefore require5 le55 force to compre55 the ~lozzle-tip i115ulator (100) by the 5ame
compre55io11 di5ta1lce.
It i5 u1lder5tood that the ~ o p oef the pre5e1lt i~lve~ltioi5~ lli mited to the 5cope provided by the
i~ldepe~ldec~laltim 5, and it i5 a150 u1lder5tood that the 5cope of the pre5e1lt i~lve~ltiio5 ~nlo t limited
20 to: (i) the depe~lde~cllta im5, (ii) the detailed de5criptio11 of the II~II-limitingem bodime1lt5, (iii) the
5ummary, (iv) the ab5tract, a~ldlor( v) de5criptio11 provided out5ide of thi5 docume~l(t that i5, out5ide
of the i115ta1lt applicatio~la 5 filed, a5 pro5ecuted, a~ldlora 5 granted). It i5 ~11lder5toodf, or the
purpo5e5 of thi5 docume~ltt,h e phra5e "i1lclude5 (but i5 not limited to)" i5 equivale~ltt o the word
"compri5i1lg". The word "compri5i1lg" i5 a tra115itio1lal phra5e or word that link5 the preamble of a
25 patent claim to the 5pecific element5 5et forth in the claim which define what the i~lve~ltiiot5~ell f
actually i5. The tra115itio1lal phra5e act5 a5 a limitation on the claim, i~ldicati~lwgh ether a 5imilar
device, method, or compo5itio11 i1lfri1lge5 the patent if the accu5ed device (etc) co1ltai115 more or
fewer element5 than the claim in the patent. The word "compri5i1lg" i5 to be treated a5 an open
tra115itio11, which i5 the broade5t form of tra115itio11, a5 it doe5 not limit the preamble to whatever
30 element5 are identified in the claim. It i5 noted that the foregoing ha5 outli~led the II~II-limiting
embodime1lt5. Thu5, although the de5criptio11 i5 made for particular II~II-limitingem bodime1lt5, the
~ o p oef the pre5e1lt i~lve~ltioi5~ 5l uitable and applicable to other arra1lgeme1lt5a nd applicatio115.
Modificatio115 to the ~lo~~-limiteim~blogd ime1lt5 can be effected without departing from the ~ o poef
the i~ldepe~ldec~lalitm 5. It i5 u1lder5tood that the ~lo~~-limietim~blogd ime1lt5 are merely illu5trative.

CLAIMS
WHAT IS CLAIMED IS:
5 1. A ~lozzle-tipi1 15ulator (loo),c ompri5i1lg:
a ~lozzle-contact5 urface (102);
a mold-gate contact 5urface (104) being off5et from the ~lozzle-contact 5urface (102);
and
a body (106) co~l~lecti~thleg ~lozzle-contact5 urface (102) with the mold-gate contact
10 5urface (104), the body (106) being re5iliently compre55ible, the body (106) defining a void
formation (108), and the body (106) and the void formation (108) being coaxially
co~lce~ltricalplyo 5itio1led relative to each other.
2. The ~lozzle-tipi1 15ulator (100) of claim 1, wherein:
the void formation (108) reduce5 tra115mi55io11 of a load (110) from the ~lozzle-contact
5urface (102) to the mold-gate contact 5urface (104).
3. The ~lozzle-tipi1 15ulator (100) of claim 1, wherein:
the void formation (108) permit5 the body (106) to u~liformly re5iliently compre55 in
re5po115e to tra115mi55io11 of a load (110) from the ~lozzle-contact5 urface (102) to the mold-gate
contact 5urface (104).
4. The ~lozzle-tipi~ lsulator( 100) of claim 3, wherein:
the void formation (108) i~lcludesa n ~IIIILI~LIS-shagpaepd (112) being formed by the
body (106).
5. The ~lozzle-tipi~ lsulator( 100) of claim 4, wherein:
the ~IIIILI~LIS-shagpaped ( 112) is formed on the mold-gate contact surface (104)
30 6. The ~lozzle-tipi~ lsulator( 100) of claim 4, wherein:
the ~IIIILI~LIS-shagpaped ( 112) is formed on the ~lozzle-contacts urface (102).
7. The ~lozzle-tipi~ lsulator( 100) of claim 4, wherein:
the ~IIIILI~LIS-shagpaepd ( 112) is formed on the mold-gate contact surface (104) and also
formed on the ~lozzle-contacts urface (102).
WO 20111127596 PCTlCA20111050160
8. The ~lozzle-tipi~ lsulator( 100) of claim 3, wherein:
the void formation (108) includes a pattern of pass-through holes (114) formed by the
body (106).
5 9. The ~lozzle-tipi~ lsulator( 100) of claim 8, wherein:
the pattern of pass-through holes (114) extends from the ~lozzle-contacts urf-ace (102) to
the mold-gate contact surface (104).
10. The ~lozzle-tipi1 15ulator (100) of claim 3, wherein:
10 the ~lozzle-contact5 urface (102) contact5 a ~lozzlea 55ernbly (116) at a11 i1111er peripheral
edge of an orifice (120) centrally defined through the body (106), and
the void formation (108) i5 defined between the body (106) and the nozzle a55ernbly
(1161,
15 11. The ~lozzle-tipi1 15ulator (100) of claim 3, wherein:
the mold-gate contact 5urface (104) contact5 a mold-gate a55ernbly (118) at an outer
peripheral edge of an orifice (120) centrally defined through the body (106), and
the void formation (108) i5 defined between the body (106) and the mold-gate a55ernbly
(118).
20
12. The ~lozzle-tipi1 15ulator (100) of claim 3, wherein:
the ~lozzle-contact5 urface (102) contact5 a nozzle a55embly (116) at an inner peripheral
edge of an orifice (120) centrally defined through the body (106),
the mold-gate contact 5urface (104) contact5 a mold-gate a55ernbly (118) at an outer
25 peripheral edge of the orifice (120) centrally defined through the body (106), and
the void formation (108) i5 defined between:
the body (106) and the nozzle a55ernbly (116), and
the body (106) and the mold-gate a55ernbly (118).
30 13. A mold-tool a55ernbly (2) having:
the ~lozzle-tipi1 15ulator (100) of any one of claim5 1 to 12.
14. A molding machine (1) i~lcludi~lg:
a mold-tool assembly (2) having the ~lozzle-tipi~ lsulator( 100) of any one of claims 1 to 12.