G17

INJECTION UNIT / MOLD INTERFACE

Treat the machine nozzle and mold sprue bush as one controlled interface.

Pair the two controlled drawings before release: seat geometry, melt-channel transition, locating/alignment, contact position and mode, thermal state, acceptance observations and change ownership.

ANSWER FIRST

Approve the pair—not two component labels in isolation.

“Nozzle radius” and “sprue-bush orifice” do not close the decision by themselves. The buyer needs one revision-controlled interface section showing how the machine nozzle seats, how the melt path transitions, how the axes are located and how the installed contact will be accepted.

Keep the interface inside the mold-fit review

Interface release gate

Identified machine, mold, nozzle tip and inlet
Approved seat and melt-channel relationship
Documented locating, alignment and contact basis
Representative acceptance observations
Controlled spares, deviations and recheck triggers

Add the interface pack to the RFQ

TWO LINKED REVIEWS

Geometry establishes the pair; installed evidence releases it.

A drawing comparison is necessary, but it does not replace a safe mold-specific setup and representative acceptance record.

CHECK A / CONTROLLED GEOMETRY

Seat, channel and datum relationship

Compare the nozzle seat, mold inlet seat, outlet/inlet transition, protrusion/contact position and locating datums from current drawings.

CHECK B / INSTALLED CONDITION

Contact, alignment and acceptance

Verify the approved contact mode, thermal/material condition and defined observations under the manufacturer and site's safe acceptance method.

RFQ / INTERFACE REGISTER

Eleven fields make the nozzle-to-mold interface reviewable.

Keep unknown relationships open. A nominal radius or orifice without the mating drawing and approval is not compatibility evidence.

Nozzle and sprue-bush RFQ fields with acceptance evidence
Field	Record for the proposed interface	Evidence to request
Interface identity	Mold, machine/injection unit, nozzle-tip assembly, sprue bush or hot-runner inlet, drawing revisions and responsible owners	Controlled machine/injection-unit and mold or hot-runner interface drawings
Machine nozzle seat	Tip style, spherical radius or flat-seat geometry, contact-face condition and replaceable component identity	Configured nozzle-tip drawing, part identity and inspection record
Mold inlet seat	Sprue-bush or machine-interface seat geometry, radius/flat condition, inlet identity and contact-face condition	Mold or hot-runner drawing plus component supplier documentation
Radius or seat pairing	Written approval of the two mating geometries, including the product-specific relationship and any permitted alternatives	Released interface drawing or approval from the responsible machine, mold and component parties
Melt-channel transition	Nozzle outlet/orifice, sprue or hot-runner inlet, transition direction and the approved relationship between the two	Dimensioned section view and material/process review; no inferred universal match
Location and alignment	Locating ring/interface, platen and mold datums, centerline requirement, fit/condition and verification method	Installation drawing, mold setup record and agreed alignment check
Contact position	Nozzle protrusion, carriage/contact position, forward travel or stop basis and allowable configured range	Current general-assembly or installation drawing and configured setup record
Contact mode and force	Continuous or retracting contact strategy, supplier-approved contact basis, mold-open state and change permissions	Machine/injection-unit instructions and released mold-specific setup
Thermal and material state	Resin, nozzle and inlet thermal state, contact duration, startup/changeover condition and any approved limits	Current material, machine and hot-runner instructions plus trial record
Acceptance observations	Visible leakage/weepage, deposits, seat marks or damage, cold material, color carryover and stable contact during the defined trial	Time-stamped inspection and representative-run record linked to the configuration
Change and handover	Approved spare tip/bush identities, recheck triggers, cleaning/inspection ownership, deviations and final release authority	Controlled parts list, setup/maintenance handover and signed deviation closure

EVIDENCE SEQUENCE

Move from two drawings to one released interface record.

The sequence is a procurement handoff, not an adjustment, inspection or operating procedure.

Freeze both identities

Record the exact machine or injection unit, mold, nozzle-tip assembly, sprue bush or hot-runner inlet and every drawing revision before comparing dimensions.

Overlay the interface

Compare the seat geometry, melt-channel transition, protrusion/contact position, locating datums and available travel in one controlled section view.

Resolve every relationship

Ask the responsible machine, mold and component parties to approve the radius/seat and outlet/inlet relationships. Do not infer one universal offset or equality.

Define the installed setup

Document the alignment check, contact mode and approved setup basis for the identified mold and machine rather than relying on nominal component labels.

Run an approved acceptance plan

Use the manufacturer and site's safe procedure with representative material and conditions, then record contact, leakage and melt-path observations without treating one symptom as a complete diagnosis.

Release and control changes

Retain drawings, setup records, observations, deviations, spare identities and recheck triggers so a nozzle, bush, mold or injection-unit change cannot silently break the interface.

OBSERVE / DO NOT OVERDIAGNOSE

Record symptoms before assigning one root cause.

Use the configured drawings, component instructions and safe investigation plan to separate geometry, condition, setup, thermal and process contributors.

Leakage or weepage

Record the location, timing, material and machine state. Leakage is an investigation trigger, not proof that radius mismatch is the only cause.

Seat marks or damage

Inspect under the approved shutdown and energy-control procedure. Preserve photos and component identity before repair or replacement changes the evidence.

Cold material or carryover

Record the thermal and material-change context. Review the channel transition and possible stagnant regions without claiming the interface is the only cause.

Unstable contact or alignment

Record carriage/contact behavior, mold location and the configured setup. Refer adjustment decisions to the current machine, mold and component instructions.

PRIMARY SOURCES / BOUNDARY

Official component and equipment sources define the questions—not a universal dimension.

The sources establish interface fields and attributed failure or flow-path examples. They do not prove a supplier configuration, prescribe one fit for every system or provide an operating procedure.

DME

Mold Bases and Plates Catalog

The official catalog describes the sprue bushing as providing a spherical-radius seat for the press nozzle and a material path, and it records radius and orifice as ordering fields.

Boundary: The catalog establishes interface fields, not a universal nozzle/bush radius or orifice relationship for every mold and machine.

DME

Three Plate Extension Bushings FAQ

The official FAQ tells users of the named assembly to select an appropriately sized nozzle-tip radius and size the nozzle exit orifice to the sprue inlet.

Boundary: This is product-specific DME guidance. The wording is not converted into a numeric rule or generalized to cold sprues, hot runners or other suppliers.

Mold-Masters

E-Multi User Manual

The official manual ties nozzle protrusion to the required contact condition, warns that incorrect adjustment may leak, and directs users to the installation or assembly drawing for the allowed range.

Boundary: The described adjustment and limits apply to the stated E-Multi equipment. This page uses only the procurement principle that the configured drawing controls.

HASCO

Hot Runner System Operating Instructions

The official troubleshooting section identifies a non-aligned nozzle contact radius and a damaged sealing surface as possible leakage conditions near the machine nozzle.

Boundary: These are HASCO hot-runner troubleshooting examples, not proof that either condition is the sole cause of leakage in another system.

Husky Technologies

Optimized Hot Runner Systems Deliver Improved Color Change Performance

The official article illustrates the machine-nozzle/sprue-bushing melt-channel interface and describes mismatch as a possible stagnant-material region in its color-change context.

Boundary: The article supports checking the transition. It does not prescribe dimensions, promise color-change performance or establish a NEW ORIENTAL IMM configuration.

Occupational Safety and Health Administration

Horizontal Injection Molding Machines

OSHA identifies hot-plastic, purge and mold-area hazards and describes guarding and energy-control expectations for applicable work.

Boundary: The page supplies a safety boundary only. Applicable law, the machine/cell risk assessment and the site's authorized procedure govern the actual work.

BUYER QUESTIONS

Nozzle and sprue-bush interface FAQ

These answers prevent catalogue labels and product-specific examples from becoming unsupported universal rules.

01Should the nozzle-tip and sprue-bush radii be identical?

Do not assume one universal relationship. Record both controlled geometries and use the current machine, mold and component instructions to approve the actual pair. A product-specific example cannot be generalized into a rule for every interface.

02Should the nozzle outlet and sprue inlet have the same diameter?

Do not infer equality from a catalogue label. Record the nozzle outlet, the sprue or hot-runner inlet and the transition shown on the controlled section drawing, then obtain the responsible parties' approval for the material and process.

03Does the locating ring prove that the nozzle is aligned?

No. A locating feature helps establish the interface, but the approved datum scheme, component condition, mold installation and verification method still belong in the setup and acceptance record.

04Does leakage prove that the contact radius is wrong?

No. Leakage is a symptom that requires a controlled investigation. Preserve the location and operating context, then review the contact faces, alignment, protrusion/contact setup, thermal state, component condition and other applicable causes.

05Is this page an adjustment or inspection procedure?

No. It is a procurement and evidence checklist. Work around a hot, pressurized nozzle or mold area must follow the machine and component instructions, applicable rules, the cell risk assessment and the site's authorized shutdown, guarding, PPE and energy-control procedure.

06What should the RFQ include for this interface?

Include both interface drawings and revisions; nozzle-tip and sprue-bush identities; seat and melt-channel geometries; locating/alignment basis; contact position, mode and approval basis; material/thermal conditions; acceptance observations; spares; deviations; and recheck triggers.

NOZZLE + SPRUE BUSH / NEXT STEP

Request one controlled interface pack for the proposed machine and mold.

Attach both drawings, component identities, seat and melt-channel relationships, locating/contact basis, material/thermal conditions, acceptance observations, deviations, spares and recheck triggers.

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