Blog
Guides and articles from Pratishna Engineers on choosing, sizing and buying injection moulding machines in India.
How Is a PET Preform Made?
The PET preform manufacturing process step by step: drying, melting, injection, hold, cooling and checks, with typical settings and a dryer sizing example.
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What Is a PET Injection Moulding Machine?
What a PET preform moulding machine is, why PET needs drying, fast cooling and low melt time, and which parts make up a working preform cell.
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Injection Moulding Machine for Household Items
Choosing a moulding machine for household products: PP grades, FSSAI food-contact rules, bucket and furniture clamp sizing and warpage control.
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Servo Pumps on Horizontal Injection Moulding Machines: Where the Power Savings Come From
Where a servo pump injection moulding machine saves power: relief-valve losses, oil heat, cooling and idle time, with a worked kWh and kVAh example.
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Toggle Clamping on Horizontal Machines: Speed, Stroke and Tonnage
Toggle clamping injection moulding explained: how the linkage builds tonnage, why it is fast, what stroke you get and what wears, with a worked example.
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How to Size a Horizontal Machine From Your Mould: Tie Bars, Daylight and Shot Weight
Injection moulding machine sizing from your mould: tie-bar gap, daylight, opening stroke and shot weight against barrel capacity, with worked numbers.
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Choosing a Horizontal Injection Moulding Machine: Match the Machine Family to the Part
Choosing a horizontal injection moulding machine: match part type, wall, clamp and shot to the right machine family, with a worked thin-wall example.
Read moreThick-Wall PETG Cosmetic Jars: Cooling Time and Sink Control
Moulding a thick-wall PETG cosmetic jar: why cooling time climbs with wall squared, how to control sink and voids, and how to dry and process PETG.
Read moreWide-Mouth Jar Preforms on a 150 Ton Machine
Sizing a wide-mouth jar preform mould for 150 t: cavities by clamp, shot and barrel, neck roundness and cooling, with a worked 70 mm jar example.
Read moreThree Screw Options for PET on a 150 Ton Machine: Which One Fits Your Preform?
How to choose a PET preform screw from three options: shot window, injection pressure, residence time and acetaldehyde, with a worked 12-cavity example.
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What PET Products Can You Make on a 150 Ton Machine?
Which PET products on a 150 ton machine make sense: preforms, jar preforms and PETG jars, with cavity limits by clamp, shot weight and injection rate.
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Deep Moulds and Long Opening Strokes: Planning Mould Height and Daylight
Plan mould height and daylight for deep moulds: opening at 2.5 times part height, two platen vs toggle opening, ejector stroke and a worked example.
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