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Description

The Polyshot Multitip System is designed to allow precision injection molders additional flexibility in the design, manufacture, and operation of their molds. The Multitip module can be used as a stand alone unit or it can be mated to a Polyshot Hot Runner Manifold to create 8, 16, 32, etc. cavity molds.

The Multitip module is a fully self-contained hot runner system consisting of a nozzle or manifold interface, externally heated flow passages, and two styles of field replaceable tips. The use of a fully hardened distribution body allows 2, 3, 4, 6 or 8 tips to be integrated into the system. It is heated by internal cartridge heaters surrounding the entire distribution body. The Multitip operates on one zone of control and is monitored by an independent thermocouple located as close to the gate orifice as possible.

As with all other Polyshot Runnerless Systems, the Multitip was designed to facilitate applications where the ultimate in precision and reliability are required.

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Multitip System Ordering Information

Overview

To order a Polyshot Multitip System, please specify the following:

  1. The tip style desired.
  2. Number of tips required
  3. “D” Diameter (2.0000″ Standard)
  4. Specify whether the application is single nozzle or manifold usage.
  5. Molding machine nozzle radius, if applicable: (1/2″ or 3/4″).
  6. Type of resin to be processed.

Multitip System Ordering Information
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P-Series Multitips

P-Series Multitips
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Part Number Number of Tips Diameter "D"
P-Multi-2 2 2.000
P-Multi-3 3 2.000
P-Multi-4 4 2.000
P-Multi-6 6 2.000
P-Multi-8 8 2.000

Click on a part number for more information


PL-Series Multitips

Part Number Number of Tips Diameter "D"
PL-Multi-2 2 2.000
PL-Multi-3 3 2.000
PL-Multi-4 4 2.000
PL-Multi-6 6 2.000
PL-Multi-8 8 2.000
PL-Series Multitips
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System Details

Single Module Sample Mold Layout

The mold design shown above is a typical layout using a single Multitip module. The mold features a standard “A” series style mold base with the mold sandwiched between the top clamp plate and the “A” cavity block.

The “A” cavity block should be constructed of hardened tool steel such as A-2 or S-7 and drawn back to a hardness of 48-50 R.C. This additional heat treat draw affords the additional durability and resistance to cracking that is required for this application. It is also recommended that the top clamp plate be constructed of pre-hardened (P-20) tool steel to maintain dimension al integrity and resistance to deformation.

The Polyshot Firebox single zone temperature control system is available for precise temperature control of molds employing the Multitip System. It features auto tuning P.I.D. circuitry with a burst fire relay, allowing absolute state of the art control over the Multitip System. The Multitip/Firebox combination allows easy one plug connection when mold disconnection is required.

Single Module Sample Mold Layout
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Standard/Optional Layout Information

Standard/Optional Layout Information
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The Multitip System is available in several different patterns. There are five probe layouts available (2–8 probes) with a “D” dimension of 2.0000″ standard. Optional “D” dimensions up to 4.2800 diameter are available at an additional cost.

Some commonly ordered optional “D” dimensions are 2.5000″, 3.0000″, 3.5000″ and 4.0000″. Optional Multitip configurations are usually delivered in 4–5 weeks.

Polyshot Corporation maintains in house testing facilities including a Multitip test mold and injection molding cell. This testing equipment is available to prove out customer supplied resins for use in the Multitip System.


Manifold System Applications

The Multitip System can be easily integrated into a Polyshot Manifold System. This compatibility allows the molder to use the maximum number of cavities in as small of an area as possible. One benefit of the Multitip system is the reduced number of zones of control required to operate the system. For example, a 64 probe (eight P-Multi-8 modules) system can operate on as few as 10 zones of control.

All Multitip manifold applications require detailed drawings to be provided for each application. The layouts shown above are examples of some of the different possible configurations in which the Multitip Modules can be arrayed on a Polyshot Manifold system. All Multitip modules used in the applications shown above constitute fully balanced material flow systems. This feature allows each molded part to fill at the same rate of pressure and speed, which results in excellent shot to shot repeatability, and improved molded part quality.

The Polyshot Multitip Manifold System is available as a pre-engineered fully assembled system ready to install into the mold. It is also available in a complete hot half system, including the Multitip system, top clamp and manifold support plates, locating ring, water line circuit and all necessary mounting holes, etc.

Manifold System Applications
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A-Half Assembly

Manifold System Applications
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The Multitip System can be easily integrated into a Polyshot Manifold System. This compatibility allows the molder to use the maximum number of cavities in as small of an area as possible. One benefit of the Multitip system is the reduced number of zones of control required to operate the system. For example, a 64 probe (eight P-Multi-8 modules) system can operate on as few as 10 zones of control.

All Multitip manifold applications require detailed drawings to be provided for each application. The layouts shown above are examples of some of the different possible configurations in which the Multitip Modules can be arrayed on a Polyshot Manifold system. All Multitip modules used in the applications shown above constitute fully balanced material flow systems. This feature allows each molded part to fill at the same rate of pressure and speed, which results in excellent shot to shot repeatability, and improved molded part quality.

The Polyshot Multitip Manifold System is available as a pre-engineered fully assembled system ready to install into the mold. It is also available in a complete hot half system, including the Multitip system, top clamp and manifold support plates, locating ring, water line circuit and all necessary mounting holes, etc.


Sample Water Line Configuration

The correct installation of water lines is critical to achieving the maximum performance of the Multitip system. The layouts shown above incorporate water lines running between the molded part and the seal surfaces of the Multitip. These designs remove the maximum amount of heat from the mold cavity, allowing the cleanest gate and shortest cycle time.

Under no circumstances should “water jacket” style cooling be the only method used to cool the cavity block which houses the Multitip.

Sample Water Line Configuration
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System Gate Well Information

P Tip Gate Well

Gate Ø Gage Dimension
.0270 .2178
.0280 .2173
.0290 .2168
.0300 .2163
.0310 .2158
.0320 .2153
.0330 .2148
.0340 .2143
.0350 .2138
.0360 .2133
.0370 .2128
.0380 .2123
.0390 .2118
.0400 .2113
.0410 .2108
.0420 .2103
P Tip Gate Well
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PL Tip Gate Well

PL Tip Gate Well
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Gate Ø Gage Dimension
.0270 .2178
.0280 .2173
.0290 .2168
.0300 .2163
.0310 .2158
.0320 .2153
.0330 .2148
.0340 .2143
.0350 .2138
.0360 .2133
.0370 .2128
.0380 .2123
.0390 .2118
.0400 .2113
.0410 .2108
.0420 .2103

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