Heatlock ESB2, Electric Sprue Bushing

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This Heatlock series, below, is currently being replaced by the A1-series of nozzles. Before you design check availability, stock is gradually decreased. Spare parts will be available until at least end of 2007 (apart form NPT1 bodies) PPB4…… mod. ESB4300… NPT1…… NPT1-Xtnd…… NPT2…… NPT3…… NPB4…… mod.ESB4300... TOP2…… ••• Excellent •• OK • Contact Heatlock – not recommend. 62 28 30 30 50 56 62 33.4 45 - 400 26 - 106 23 22 22 (26+4) - (106+4) 46 - 176 26 - 66 28 23 28 28 30 45 - 400 23 33.4 27 27.4 10 30 - 83 0.2 0.2 0.5 1 0.2 25 25 0,5xd Ød 0,2-0,5 Ø1-3 0,2-0,4 Ø0,7-2,0 0,2-0,4 Ø0,7-2,0 Ø1,5-4 0,25-0,7 Ø2-5 0-0,4 Ø0,6-3 0,3-0,6 Low-viscosity PE, PS,PP 2000g 150g 150g 350g 1000g 1500g 80g Medium-viscosity ABS, PA, POM, SAN 1000g 100g 80g 150g 500g 800g 40g High-viscosity 500g 30g 20g 30g 300g 350g 30g PP •• ••• ••• ••• ••• •• ••• PS, PE ••• ••• ••• ••• ••• ••• ••• ABS ••• ••• ••• ••• ••• ••• ••• PA6 – ••• ••• ••• ••• ••• •• POM •• ••• ••• ••• ••• ••• •• SAN •• ••• ••• ••• ••• ••• ••• PA6.6 – ••• ••• ••• ••• ••• •• PC ••• •• ••• ••• ••• ••• •• PMMA – • • • • ••• • PPO • •• •• •• •• ••• •• PET, PBT, PES, PEEK, – • • • • •• • Low/Med viscosity+GL – - - - - •• - Date: 030928, © LKM Heatlock Co Ltd 1.7
This Heatlock series, below, is currently being replaced by the A1-series of nozzles. Before you design check availability, stock is gradually decreased. Spare parts will be available until at least end of 2007 (apart form NPT1 bodies) INTRODUCTION How you can be more effective and more competitive by using our ceramically insulated Heatlock hot-runner system. The old way with a cold sprue Let us assume you are going to make a new mould with 8 cavities. If you make it in the old way will it look as fig1. Measured on the sketch the maximum length of flow in cold steel is 75mm. Please note as well that flow lengths to each different cavity are not equal which means you will not have an identical fill of each cavity. fig. 1. If you make the mould as shown in fig.2 and use a Heatlock electric sprue bush will you eliminate the conventional thick and long sprue. In many cases the part which has the thickest wall section determines cooling time instead of each cavity. Advantages: Improved efficiency with a Heatlock sprue bushing — Flow length in cold steel has been reduced by 38%. Everyone familiar with injection moulding knows that it is easier to mould when flow length is short. — Cycle time can be reduced, the thickest part of the shot has been eliminated. — Less production stops – no sprue that can get stuck in the fixed half of the mould. — No risk on automatic production that last shot will stick on earlier produced ones when ejected. The most difficult part to cool has been eliminated. — Opening stroke can be reduced as part height is decreased with shorter cycle time as a result. fig. 2. Fig 3. demonstrates an improvment using 2 electric sprue bushes, ESB's, including a manifold. You now produce the following advantages: 1.8 Date: 031118, © LKM Heatlock Co Ltd
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Heatlock ESB2, Electric Sprue Bushing

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