SR24 Hot Runner Nozzles arefor large part applicationsand are available with band,helical and tubular heaters.One band heater is requiredfor operation but an installedspare may be provided ifspace allows. They areavailable in lengths from 120to 900 (“J” dimension).Designed for high flow thesenozzles are available withCV10, CV20 full flow andvalve gate tips only.

Suitable for all materials andavailable with six SynventiveControlled Vestige (CV) tipoptions including valve gatesfor zero gate vestige applica-tions.

SR24-1

SR24 SeriesFeatures

J

Ø13-25

Threaded Tips

Thermocouple

Heat Pipes

ReplaceableHeaters

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All Dimensions in mm

SR24-2

SR24 SeriesHeater Options

155 spare heater installed

Ø 65

120

J

20 wide x 36 deepwire slot

90 single heater

Ø 95 x 12 deep

H6Ø 6

22

H6

53

Ø 114

Ø13-25

One heater required for operation.If mold thickness allows a spareband heater will be installed.

J Minimum = 120J Maximum = 380

H6

Ø 88

Ø 76

wire slot20 wide x 36 deep

Ø 114

J

For J 175-300, Ø88

For J 300-625, Ø88

Ø13-25

not required

X J/2 deep

x 12 deep

H6Ø 6

22

53

120

Band Heater

Helical HeaterWhen J is greater than 300 twoheaters are required for opera-tion.

J Minimum = 175J Maximum = 625

SR24-3

SR24 SeriesHeater Options

H6

120

Ø 75

Ø 114

J

Ø 6x 12 deep

H6

22

53

Dowels shown 90out of true location

100

76 DeepX 50 wide

Ø13-25

Each nozzle requires 2 heaterswired in parallel to create onezone.

J Minimum = 220J Maximum = 900

Tubular Heater

SR24-4

SR24 SeriesOverview

Thermal GateNozzle

See page SR24-5 toselect a tip that suitsyour application

CV10- Filled and unfilled materials- Open flow channel/higher flow- 3.0 to 8.0 orifice diameter- Patented seal- Easier mold geometryDimensional data on Pages SR24-9 & 10

Valve GateNozzle

CV20- Filled and unfilled materials- Open flow channel/higher flow- 3.0 to 8.0 orifice diameter- Patented seal- No witness mark- Easier color changeDimensional data on Pages SR24-11, 12 & 13

VG12- Filled and unfilled materials- “0” vestige- Tapered shut off- 6.4 orifice diameter- Patented seal- Easier mold geometryDimensional data on Pages SR24-14 & 15

VG12S- Filled and unfilled materials- “0” vestige- Diametric shut off- Materials having glass fiber fillers- 8.0 orifice diameter- Patented seal- Easier mold geometryDimensional data on Pages SR24-16 & 17

VG23- Filled and unfilled materials- “0” Vestige- Tapered shut off- 6.4 orifice diameter- Patented seal- No witness markDimensional data on Pages SR24-18 & 19

VG23S- Filled and unfilled materials- Materials having glass fibers- Diametric shut off- “0” Vestige- 8.0 orifice diameter- Patented seal- No witness markDimensional data on Pages SR24-20 & 21

SR24-5

SR24 SeriesMaterial Compatibility

PE PP PEEK

PPS

PET

PBT

PPO

/PA

PA PPA

POM

PMM

A

ABS

ASA

SAN

PS PC/A

BS

PC PES

PSU

PEI

PPO

TPE

Add

itiv

es

Semi-crystalline Amorphous

A

B

C

D

Material

Tip Style

+ + - - - - - - - - + + + + + + + - - - + -

-++ ----- --+--- --++- -+-

-++ ++-+- --+-+- --++- -+-

-++ ----- --+--- --++- -+-

A

B

C

D

+ + - - - - - - - 0 - - - + -+ + + + + + +

------++ 0 +++-+++ -- -+--

--+---++ 0 +++--+- -- -+--

+-+ + ++ + + --- +0 - -+ + + - - + -

The above table defines which tipstyles are best suited for a givenmaterial.

Note:The selection table is meantto be a guide for the initialselection of the tip style. It isbased on the more commongrades of material.Synventive will verify thecorrect tip selection as partof the quote/order process.

Additive IndexA - NoneB - FillersC - Glass FiberD - Flame retardants

+ Very suitable0 Suitable- Not suitable

CV10

CV20

A

B

C

D

+ + - - + + + + + + + + - - -

- ----- ----- --- -

-00 0-00- 00- --00 -

+++ ++

- - - --

---- - - - - - - -- - -- - - - --

00 00

--

+ 0

+

-

+

-VG12

A

B

C

D

-++ 0000- -+- --++ 0+--+ ++

+-++ + ++- + + +++ -++++ +-- 0

---- - - - - - - -- - -- - - - -- - -

--- - ---- -- --- ---- - -- - -

A

B

C

D

+ + - - + + + + + + + + - - - + +

- ----- ----- --- --

-++ 0000- 00- --++ ++-

+++ ++

- - - -- -

---- - - - - - - -- - -- - - - -- - -

0+ +0

A

B

C

D

-++ +0++- 00- --++ 0+--+ +0

+-++ + ++- + + +++ -++++ +-- 0

---- - - - - - - -- - -- - - - -- - -

--- - ---- -- --- ---- - -- - -

VG12S

VG23S

VG23

SR24-6

SR24 SeriesFlow Rate

Maximum flow rate of hot runnernozzles varies depending on themelt index of the material beingprocessed.

The flow rate of any hot runnernozzle is controlled by threefactors:

1) Flow bore size

2) Melt temperature, viscosity vs shear rate relationship.

3) The cavity wall thickness, flow length from the gate, mold temperature and required fill rate.

The last two factors can combineto change the maximum shotcapacity by a factor of 5 or more.Synventive uses computerizedflow analysis to assure thecorrect nozzle is chosen.

Example

Material: PE

Tip style: CV10

Maximum flow rate: 2000 grams/second

Note:Values in the table do notinclude reinforced materialsor materials with fillers.

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02VC/01VC )S(32GV/)S(21GV

SBA ces/mg0051 ces/mg008

CP ces/mg055 ces/mg571

OPP ces/mg057 ces/mg571

TBP ces/mg057 ces/mg571

CP/TBP ces/mg005 ces/mg571

SBA/CP ces/mg055 ces/mg571

SP ces/mg0002 ces/mg009

PP ces/mg0052 ces/mg009

AP ces/mg0051 ces/mg007

MOP ces/mg056 ces/mg053

EP ces/mg0002 ces/mg009

cilyrcA ces/mg0021 ces/mg054

CVP ces/mg056 ces/mg053

RPT - ces/mg009

SR24-7

SR24 SeriesOrifice Guidelines

This table lists the normal gateorifice required to fill an averagecavity of the listed wall thicknessand surface area.

The orifice diameter is based onthe flow and freeze characteris-tics of each type of plastic at itsnormal processing conditions. It isnot dependent on whether thecavity is fed by a hot or coldrunner.

Some of the listed wall thicknessand surface area combinations arenot applicable to all plasticsbecause of the flow length to wallratios of each material. Consultplastic supplier’s processingrecommendations.

Due to the gate limitations of eachhot runner nozzle, the actual gatemay be slightly smaller or largerthan the tabulated orifice.

Material FactorsUse tabulated orifice for PE, PP, PS,SAN and PUR.

Use tabulated orifice x 1.15 for POM,PC, PPO and ABS.

Use tabulated orifice x 1.30 for Acrylic,PA, PET, and PBT

Use tabulated orifice x 1.50 for PVC.

For non-reinforced PA, PET and PBT theminimum orifice diameter should be3.00. For reinforced PA, PET and PBTthe minimum orifice diameter shouldbe 3.96.

Part Area is total outside area and notthe projected area of the part.

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00.1)40.0(

52.1)50.0(

05.1)60.0(

57.1)70.0(

00.2)80.0(

52.2)90.0(

05.2)01.0(

00.3)31.0(

00.4)61.0(

006 09.0 09.0 09.0 09.0 09.0 09.0 59.0 00.1 21.1 72.1

0.1 530.0 530.0 530.0 530.0 530.0 530.0 730.0 930.0 440.0 050.0

0021 09.0 09.0 09.0 29.0 00.1 50.1 21.1 71.1 23.1 05.1

0.2 530.0 530.0 530.0 630.0 930.0 140.0 440.0 640.0 250.0 950.0

0081 09.0 09.0 59.0 20.1 01.1 71.1 52.1 03.1 74.1 86.1

0.3 530.0 530.0 730.0 040.0 340.0 640.0 940.0 150.0 850.0 660.0

0042 09.0 09.0 20.1 01.1 02.1 52.1 53.1 04.1 85.1 87.1

0.4 530.0 530.0 040.0 340.0 740.0 940.0 350.0 550.0 260.0 070.0

0003 09.0 59.0 70.1 71.1 52.1 23.1 24.1 74.1 56.1 88.1

0.5 530.0 730.0 240.0 640.0 940.0 250.0 650.0 850.0 560.0 470.0

0006 00.1 21.1 72.1 73.1 05.1 85.1 86.1 67.1 89.1 62.2

0.01 830.0 440.0 050.0 450.0 950.0 260.0 660.0 960.0 870.0 980.0

000,21 71.1 23.1 35.1 56.1 87.1 88.1 )00.2 80.2 63.2 76.2

0.02 640.0 250.0 060.0 560.0 070.0 470.0 970.0 280.0 390.0 501.0

000,81 03.1 74.1 86.1 38.1 69.1 60.2 12.2 13.2 26.2 79.2

0.03 150.0 850.0 660.0 270.0 770.0 180.0 780.0 190.0 301.0 711.0

000,42 73.1 85.1 08.1 69.1 01.2 42.2 93.2 94.2 08.2 81.3

0.04 450.0 260.0 170.0 770.0 380.0 880.0 490.0 890.0 011.0 521.0

000,03 54.1 56.1 09.1 60.2 42.2 63.2 15.2 46.2 59.2 53.3

0.05 750.0 560.0 570.0 180.0 880.0 390.0 990.0 401.0 611.0 231.0

000,63 35.1 37.1 89.1 61.2 43.2 64.2 46.2 77.2 01.3 35.3

0.06 060.0 860.0 870.0 580.0 290.0 790.0 401.0 901.0 221.0 931.0

000,24 85.1 08.1 80.2 62.2 14.2 75.2 57.2 78.2 32.3 66.3

0.07 260.0 170.0 280.0 980.0 590.0 101.0 801.0 311.0 721.0 441.0

000,84 56.1 88.1 31.2 43.2 15.2 46.2 28.2 79.2 33.3 97.3

0.08 560.0 470.0 480.0 290.0 990.0 401.0 111.0 711.0 131.0 941.0

000,45 07.1 39.1 12.2 93.2 06.2 27.2 29.2 50.3 34.3 98.3

0.09 760.0 670.0 780.0 490.0 201.0 701.0 511.0 021.0 531.0 351.0

000,06 37.1 89.1 62.2 64.2 46.2 08.2 00.3 21.3 35.3 99.3

0.001 860.0 870.0 980.0 790.0 401.0 011.0 811.0 321.0 931.0 751.0

000,09 39.1 81.2 15.2 27.2 29.2 01.3 03.3 54.3 98.3 24.4

0.021 670.0 680.0 990.0 701.0 511.0 221.0 031.0 631.0 351.0 471.0

000,021 - 63.2 07.2 29.2 01.3 33.3 65.3 37.3 02.4 57.4

0.002 - 390.0 601.0 511.0 421.0 131.0 551.0 741.0 561.0 781.

000,081 - - 79.2 32.3 84.3 86.3 49.3 51.4 26.4 62.5

0.003 - - 711.0 721.0 731.0 541.0 551.0 261.0 281.0 702.0

000,042 - - - 84.3 67.3 89.3 22.4 24.4 89.4 45.5

0.004 - - - 731.0 841. 651.0 661.0 471.0 691.0 812.0

SR24-8

SR24 SeriesManifold Integration

Preload cold

J

T

65

Thrust PadTCP

H6

Metal O-ring

Ø16

Center Locator

6

Railheight

SR24 hot runner systems aredesigned with a preload betweenthe thrust pads and the mold platesin the cold condition. As themanifold heats an additional sealingforce is created.

The thrust pads are made of a lowconductivity material and shouldonly be replaced with an equivalentSynventive part.

Excessive contact with the mold willcause heat sinks and affect thesystem performance. Contact withthe mold must be limited tospecified areas.

T = Rail height - 6 - 65 (manifold)

Minimum T = 10

Minimum rail height = 81 .

Support ring nozzles do not line upwith the sub-runners in the manifoldin the cold condition. As themanifold heats up the manifold sub-runner locations expand to thecorrect location.

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SR24-9

SR24 SeriesManifold Nozzle

6 ContactØ3-8

Ø32H6

4

25 Ref

12030

34 Band heater (shown)37.2 Helical heater36.8 Tubular Heater

6

J

3Land

Filled and unfilled materials.

Easy orifice size changes bystraight reaming

Open flow bore

Heat pipes for isothermaloperation.

The front face of the tip must bein contact with plastic.

Cooling is required in the gatearea.

SR24 CV10

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SR24 SeriesCV10 Angled Mold Contour & Recess

Angled Mold Contour

Extension

L

3 Land

K

contact3 Min

1.6 Min

E = 16TAN

L = 3 + K - TAN

E = K + 16TAN

L = 3 - TAN

14°; K= 5.7TAN + - 3

2Orifice Dia.Orifice Dia.

2

COS1.614°; K= 0

When gating on an angled moldcontour the vestige height may beincreased depending on the angle.

K is the increase in vestige heightrequired to maintain 1.6 minimumwall thickness and/or 3 minimumcontact.

orifice2

orifice2

Orifice

3.0 +

Recessed gates are used to reducethe vestige height above the partsurface or keep the vestige belowthe part surface.

For most materials CV10 vestigeheight is equal to 3.0 + orifice/2.

Values in tables are for materialsnot having glass fibers. ConsultSynventive for vestige heightwhen using glass fillers.

Dimple diaD

3 Mincontact

R30hRecess

Spherical RecessD = 2 h(60-h)h Max = 6

Land3

SR24-10

sseceRlacirehpS

h D

0.3 2.62

5.3 1.82

0.4 9.92

5.4 6.13

0.5 0.23

5.5 0.23

0.6 0.23

SR24-11

SR24 SeriesManifold Nozzle

Ø3-8

Ø32H6

5

25 Ref

12060

34 Band heater (shown)37.2 Helical heater36.8 Tubular Heater

Ø11.4

Ø16.9

6

J

12.3

45

3Land

6.9

Filled and unfilled materials.

Easy orifice size changes bystraight reaming .

No tip witness mark on part.

Open flow bore.

Heat pipes for isothermaloperation.

Cooling is required in the gatearea.

SR24 CV20

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SR24-12

SR24 SeriesCV20 Recess

Conical Recess

hRecess

DDimple dia

Ø17

30

D = 17 + 3.5(h)h Max = 6

Land3

Recessed gates are used to reducevestige height above the partsurface or keep the vestige belowthe part surface.

For most materials CV20 vestigeheight is equal to 3.0 + orifice/2.

orifice2

3.0 + orifice2

Orifice

Values in tables are for materialsnot having glass fibers. ConsultSynventive for vestige heightwhen using glass fillers.

Dimple dia Land3

R30

D

Recessh

D = 2 h(60-h)h Max = 6

Spherical Recess

sseceRlacinoC

h D

0.3 5.72

5.3 3.92

0.4 0.13

5.4 8.23

0.5 5.43

5.5 3.63

0.6 0.83

sseceRlacirehpS

h D

0.3 2.62

5.3 1.82

0.4 9.92

5.4 6.13

0.5 2.33

5.5 6.43

0.6 0.63

SR24-13

SR24 SeriesCV20 Angled Mold Contour

Angled Mold Contour

L

3 Land

K

1.6 Min

L = 2 + K - TANL = 2 - TAN2

Orifice Dia.Orifice Dia.2

COS1.38°; K= 0 8°; K= 4.75TAN + - 3

When gating onto an angled moldcontour, the vestige height may beincreased depending on the angle.

K is the increase in vestige heightrequired to maintain 1.6 minimumwall thickness.

SR24-14

SR24 SeriesManifold Nozzle

6 Contact

Ø32H6

4

25 Ref

12030

34 Band heater (shown)37.2 Helical heater36.8 Tubular Heater

Ø6.40.13

Pin protrusionR0.13

Ø8

15

3 Land

6

J

Filled and unfilled materials.

Heat pipes for isothermaloperation.

Tapered valve pin to eliminategate flash.

The front face of the tip must bein contact with plastic.

Cooling is required in the gatearea.

SR24 VG12 Tapered

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SR24-15

SR24 SeriesVG12 Angled Mold Contour

3 Land

K

1.6 Min

Extension

3 Min

R0.13Ø6.4

Pin protrusion0.13

30

E = K + 16TAN

11°; K= 0

E = 16TAN

COS1.6

Angled Mold Contour

11°; K= 5.7TAN + - 3

When gating on an angled moldcontour the orifice land may beincreased depending on the angle.

K is the increase in land required tomaintain 1.6 minimum wall thick-ness and/or 3 minimum contact.

SR24-16

SR24 SeriesManifold Nozzle

6 Contact

Ø32H6

4

25 Ref

12030

34 Band heater (shown)37.2 Helical heater36.8 Tubular Heater

Ø8.0030.13

Pin protrusion

R0.13

30

3 Land

6

J

0.4

Ø8.013

Filled and unfilled materials.

Heat pipes for isothermaloperation.

Straight valve pin in gate for non-adjustable actuators and glassfilled materials.

The front face of the tip must bein contact with plastic.

Cooling is required in the gatearea.

SR24 VG12S Straight

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SR24-17

SR24 SeriesVG12S Angled Mold Contour

3 Land

KExtension

3 mincontact

R0.13

0.4

Ø8.013Ø8.003

Pin protrusion0.13

30

COS11°; K= 5.7TAN + - 3

E = 16TAN

11°; K= 0

E = K + 16TAN

1.6 Min

Angled Mold Contour

1.6

When gating on an angled moldcontour the orifice land may beincreased depending on the angle.

K is the increase in land required tomaintain 1.6 minimum wall thick-ness and/or 3 minimum contact.

SR24-18

SR24 SeriesManifold Nozzle

Ø32H6

5

25 Ref

9060

34 Band heater (shown)37.2 Helical heater36.8 Tubular Heater

120

6.9

12.3

Ø11.4

Ø16.9

Ø8

15

Pin protrusion0.13

R0.13

Ø6.4

3 Land

6

J

R1.5 typ.

Filled and unfilled materials.

No tip witness mark on part.

Heat pipes for isothermaloperation.

Tapered valve pin to eliminategate flash.

Cooling is required in the gatearea.

SR24 VG23 Tapered

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SR24-19

SR24 SeriesVG23 Angled Mold Contour

3 Land

K

1.6 Min

30

R0.13Ø6.4

Pin protrusion0.13

COS

Angled Mold Contour11°; K= 0 11°; K= 5.7TAN + - 31.6

When gating on an angled moldcontour the orifice land may beincreased depending on the angle.

K is the increase in land required tomaintain 1.6 minimum wall thick-ness.

SR24-20

SR24 SeriesManifold Nozzle

Ø32H6

5

25 Ref

9060

34 Band heater (shown)37.2 Helical heater36.8 Tubular Heater

120

6.9

12.3

Ø11.4

Ø16.9

30

Pin protrusion0.13

R0.13

Ø8.003

3 Land

6

J

Ø8.0130.4

R1.5typ

Filled and unfilled materials.

No tip witness mark on part.

Heat pipes for isothermaloperation.

Straight valve pin in gate for non-adjustable actuators and glassfilled materials.

Cooling is required in the gatearea.

SR24 VG23SStraight

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SR24-21

SR24 SeriesVG23S Angled Mold Contour

3 Land

K

1.6 Min

R0.13Ø8.013Ø8.003

Pin protrusion0.13

30

0.4

11°; K= 5.7TAN + - 311°; K= 0 1.6COS

Angled Mold Contour

When gating on an angled moldcontour the orifice land may beincreased depending on the angle.

K is the increase in land required tomaintain 1.6 minimum wall thick-ness.