{"id":440,"date":"2026-04-30T08:54:11","date_gmt":"2026-04-30T08:54:11","guid":{"rendered":"https:\/\/onestepblowmachine.com\/?p=440"},"modified":"2026-04-30T08:54:11","modified_gmt":"2026-04-30T08:54:11","slug":"como-la-reduccion-de-peso-mediante-maquinas-de-moldeo-por-inyeccion-estirado-soplado-disminuye-el-uso-de-plastico-sin-sacrificar-la-integridad-de-la-botella","status":"publish","type":"post","link":"https:\/\/onestepblowmachine.com\/es\/solicitud\/como-la-reduccion-de-peso-mediante-maquinas-de-moldeo-por-inyeccion-estirado-soplado-disminuye-el-uso-de-plastico-sin-sacrificar-la-integridad-de-la-botella\/","title":{"rendered":"C\u00f3mo la reducci\u00f3n de peso mediante m\u00e1quinas de moldeo por soplado y estirado por inyecci\u00f3n disminuye el uso de pl\u00e1stico sin sacrificar la integridad de la botella."},"content":{"rendered":"
\n

C\u00f3mo la reducci\u00f3n de peso mediante m\u00e1quinas de moldeo por soplado y estirado por inyecci\u00f3n disminuye el uso de pl\u00e1stico sin sacrificar la integridad de la botella.<\/h2>\n

A deep-dive technical guide for packaging engineers, procurement managers, and sustainability leads exploring how the one-step m\u00e1quina de moldeo por inyecci\u00f3n, estirado y soplado<\/strong> process enables wall-thickness reduction, resin savings, and improved mechanical performance \u2014 simultaneously. Targeted at producers across Colombia, Mexico, Ecuador, and the wider Latin American packaging market.<\/p>\n

One-Step ISBM Process<\/span>
\nPET \/ PETG \/ PP \/ PC \/ Tritan \/ PLA<\/span>
\nUp to 40% Energy Reduction<\/span>
\nColombia & LATAM Focus<\/span><\/div>\n<\/div>\n

<\/p>\n

\n

Quick Summary:<\/strong> Lightweighting \u2014 reducing the mass of a plastic container while maintaining or improving its functional performance \u2014 is one of the most impactful sustainability levers available to packaging producers. The one-step m\u00e1quina de moldeo por inyecci\u00f3n, estirado y soplado<\/strong> is uniquely positioned to enable this approach because its integrated process allows precise, repeatable wall thickness control from a thermally consistent preform, producing biaxially oriented containers whose structural efficiency per gram of resin far exceeds what extrusion blow moulding or two-step reheat stretch blow moulding can achieve.<\/p>\n

Unlike two-step processes where preform reheating introduces thermal non-uniformity across the preform body \u2014 and therefore wall thickness variation in the finished bottle \u2014 the one-step proceso de moldeo por inyecci\u00f3n, estirado y soplado<\/strong> transitions the preform directly from injection into the stretch-blow station at a controlled, uniform temperature. This consistency is the physical basis for the thinner, more uniform walls that define a lightweighted ISBM bottle.<\/p>\n

For Colombian and Latin American packaging producers facing rising virgin PET resin costs, tightening extended producer responsibility (EPR) regulations, and consumer demand for sustainable packaging, understanding the specific mechanisms by which an m\u00e1quina de moldeo por inyecci\u00f3n, estirado y soplado<\/strong> enables lightweighting \u2014 without mechanical failure, barrier degradation, or seal-integrity compromise \u2014 is a strategic competitive requirement.<\/p>\n<\/div>\n

 <\/p>\n

1. Technical Parameters \u2014 ISBM Machine Series for Lightweighted Bottle Production<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Par\u00e1metro<\/th>\nUnidad<\/th>\nEP-HGY50-V3-EV (3-station)<\/th>\nHGY150-V4 (4-station)<\/th>\nHGY200-V4 (4-station)<\/th>\nHGY250-V4 (4-station)<\/th>\n<\/tr>\n<\/thead>\n
Materiales aplicables<\/td>\n\u2014<\/td>\nPET \/ PETG<\/td>\nPET \/ PETG<\/td>\nPET \/ PETG<\/td>\nPET \/ PETG<\/td>\n<\/tr>\n
Screw Diameter (optional)<\/td>\nmm<\/td>\n40 \/ 50 \/ 55<\/td>\n40 \/ 50 \/ 55 \/ 60<\/td>\n40 \/ 50 \/ 55 \/ 60<\/td>\n50 \/ 55 \/ 60<\/td>\n<\/tr>\n
Volumen de inyecci\u00f3n te\u00f3rico<\/td>\ncm\u00b3<\/td>\n239 \/ 315 \/ 442<\/td>\n188 \/ 310 \/ 380 \/ 480<\/td>\n188 \/ 310 \/ 380 \/ 480<\/td>\n340 \/ 420 \/ 480<\/td>\n<\/tr>\n
Fuerza de sujeci\u00f3n por inyecci\u00f3n<\/td>\nkN<\/td>\n50<\/td>\n150<\/td>\n300<\/td>\n300<\/td>\n<\/tr>\n
Blowing Clamping Force (single side)<\/td>\nkN<\/td>\n100<\/td>\n200<\/td>\n200<\/td>\n200<\/td>\n<\/tr>\n
Potencia del motor<\/td>\nkW<\/td>\n34.8<\/td>\n43.2<\/td>\n49.2<\/td>\n67.7<\/td>\n<\/tr>\n
Potencia de calefacci\u00f3n<\/td>\nkW<\/td>\n10.4<\/td>\n10<\/td>\n10<\/td>\n15<\/td>\n<\/tr>\n
Presi\u00f3n de aire de soplado<\/td>\nMPa<\/td>\n2.0 \u2013 3.5<\/td>\n2.0 \u2013 3.5<\/td>\n2.0 \u2013 3.5<\/td>\n2.0 \u2013 3.5<\/td>\n<\/tr>\n
Presi\u00f3n del agua de refrigeraci\u00f3n<\/td>\nMPa<\/td>\n0.4 \u2013 0.6<\/td>\n0.4 \u2013 0.6<\/td>\n0.4 \u2013 0.6<\/td>\n0.4 \u2013 0.6<\/td>\n<\/tr>\n
Voltaje de la m\u00e1quina<\/td>\nV<\/td>\n370 \u2013 400<\/td>\n370 \u2013 400<\/td>\n370 \u2013 400<\/td>\n370 \u2013 400<\/td>\n<\/tr>\n
Dimensiones de la m\u00e1quina (largo \u00d7 ancho \u00d7 alto)<\/td>\nmm<\/td>\n3800 \u00d7 1200 \u00d7 2500<\/td>\n4200 \u00d7 1400 \u00d7 2900<\/td>\n4800 \u00d7 2000 \u00d7 3200<\/td>\n6300 \u00d7 2400 \u00d7 3700<\/td>\n<\/tr>\n
Peso de la m\u00e1quina<\/td>\nT<\/td>\n3.5<\/td>\n6<\/td>\n13<\/td>\n16<\/td>\n<\/tr>\n
Max Bottle Volume (single cavity)<\/td>\nml<\/td>\n2,500<\/td>\n2,500<\/td>\n2,500<\/td>\n2,500<\/td>\n<\/tr>\n
Compatibilidad de moldes ASB \/ Aoki<\/td>\n\u2014<\/td>\n\u2014<\/td>\nASB-12M<\/td>\nAoki 250 (V4-B)<\/td>\nASB-70DPH<\/td>\n<\/tr>\n
Sistema de transmisi\u00f3n<\/td>\n\u2014<\/td>\nFully Electric (EV)<\/td>\nServo Pump \/ Servo<\/td>\nServo Pump<\/td>\nServo Pump<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

\"m\u00e1quina<\/p>\n

2. What Lightweighting Actually Means in a One-Step Injection Stretch Blow Moulding Context<\/h2>\n

Lightweighting in plastic container manufacturing does not simply mean making thinner walls. It means achieving the same or better structural performance \u2014 top-load strength, internal pressure resistance, drop impact survival, oxygen barrier \u2014 with a lower mass of resin. This distinction matters because naive wall reduction without process control produces bottles that fail at retail handling or during filling-line pressurisation. The engineering challenge is to go thinner while simultaneously improving the molecular architecture of the material that remains. The one-step m\u00e1quina de moldeo por inyecci\u00f3n, estirado y soplado<\/strong> solves this challenge through the physical mechanism of biaxial orientation: stretching the material both axially (along the bottle’s height) and radially (around its circumference) simultaneously during the blow phase. This oriented stretching reorganises the polymer chains from a random amorphous arrangement into a highly ordered, interlocked network that is mechanically far superior to the un-oriented material that exits the injection mould.<\/p>\n

In practical terms, a biaxially oriented PET wall of 0.25\u2009mm can carry the same top-load force as an un-oriented PET wall of 0.40\u2009mm. That 0.15\u2009mm difference per wall, multiplied across the entire sidewall surface of a 500\u2009ml beverage bottle, translates into a resin saving of 3\u20134 grams per bottle. At a production rate of 5,000 bottles per hour on a multi-cavity m\u00e1quina de moldeo por inyecci\u00f3n, estirado y soplado<\/strong>, this amounts to 15\u201320\u2009kg of resin per hour \u2014 or roughly 120\u2013160 tonnes of PET per year on a single machine running two shifts. At current Colombian domestic PET resin prices, this represents a meaningful and direct cost reduction, independently of any regulatory pressure or brand sustainability commitment.<\/p>\n

The reason a one-step machine enables this more reliably than a two-step reheat process is thermal history. In the two-step approach, the preform is injection-moulded, cooled to ambient temperature, stored (sometimes for days), then reheated in a separate infrared oven before blowing. This reheating cycle introduces thermal gradients across the preform wall \u2014 the outer surface heats faster than the core \u2014 leading to non-uniform blow conditions. The ISBM machine eliminates this variable entirely: the preform moves directly from the injection station to the temperature-conditioning station and then to the stretch-blow station, with its thermal profile managed throughout as a single continuous process. The preform wall temperature is uniform from surface to core because it has never been fully cooled. This thermal consistency is the mechanical prerequisite for the predictable, uniform wall distribution that lightweighted bottles demand.<\/p>\n<\/div>\n

<\/p>\n

\"M\u00e1quina<\/div>\n

<\/p>\n

\n

3. Action Mode \u2014 How the One-Step ISBM Process Executes Lightweighting<\/h2>\n

El paso \u00fanico m\u00e1quina de moldeo por inyecci\u00f3n, estirado y soplado<\/strong> operates on a rotary station turntable that carries preforms through the entire forming cycle without releasing them from the neck ring \u2014 the dimensional reference for the container\u2019s critical finish (thread form and sealing surface). This continuous neck-ring retention is the mechanical root cause of the superior neck-finish quality that ISBM bottles exhibit: because the neck is never released and re-gripped, there is no opportunity for re-gripping distortion, thread offset, or sealing-surface misalignment of the kind that causes cap leakage in bottles produced by two-step processes.<\/p>\n

\n
\n

Station 1 \u2014 Injection<\/strong><\/p>\n

Molten resin (PET, PETG, PP, PC, Tritan, PLA, etc.) is injected into the preform cavity at controlled injection pressure and speed. The preform is formed around the neck core, establishing the finished thread geometry and the preform body wall thickness that determines the stretch ratio and final bottle wall thickness.<\/p>\n<\/div>\n

\n

Station 2 \u2014 Temperature Conditioning \/ Tail Cutting<\/strong><\/p>\n

The preform is held in the temperature-regulating station to equalise temperature throughout the wall and adjust the thermal profile for optimal stretch-blow conditions. Gate tail trimming occurs here. This station is the core enabler of the uniform wall distribution that makes lightweighted bottles structurally viable.<\/p>\n<\/div>\n

\n

Station 3 \u2014 Stretch Blow Moulding<\/strong><\/p>\n

The stretch rod extends axially while high-pressure air (2.0\u20133.5\u2009MPa) simultaneously expands the preform radially against the blow mould cavity. Biaxial orientation of the polymer chains occurs during this step, producing the improved strength, barrier properties, and clarity that allow wall thickness reduction without sacrificing performance.<\/p>\n<\/div>\n

\n

Station 4 \u2014 Bottle Take-Out<\/strong><\/p>\n

The finished, cooled bottle is released from the neck ring and transferred via the take-out mechanism to the downstream conveyor. The neck ring is cleaned and reloaded for the next cycle. No further handling of the neck finish occurs, preserving the dimensional accuracy established at Station 1.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

\n

4. Structural Type \u2014 Machine Configurations That Enable Lightweighting<\/h2>\n

The available machine configurations span 3-station and 4-station rotary designs, with standard hydraulic, servo-hybrid, and fully electric drive options. Each configuration affects the degree of control over preform thermal profile \u2014 the key variable in lightweighting \u2014 and the cycle time consistency that determines whether wall-thickness targets are achievable in sustained production rather than just in single-bottle trials.<\/p>\n

The 3-station design (represented by models such as the EP-HGY50-V3-EV) consolidates the temperature-conditioning and take-out functions, producing a compact machine format suited to small-volume, high-mix production of specialty bottles \u2014 cosmetics, pharmaceutical vials, laboratory containers \u2014 where lightweighting targets are defined bottle by bottle rather than across high-volume runs. The 4-station design (HGY150-V4, HGY200-V4, HGY250-V4, HGY650-V4, and their servo\/fully-electric variants) introduces a dedicated temperature-conditioning station, which provides the greatest thermal control over the preform body \u2014 the direct enabler of maximum lightweighting depth. The 6-station design (HGYS280-V6) doubles the injection unit capacity, increasing cavitation and output while maintaining the same thermal management architecture.<\/p>\n

El fully electric injection stretch blow moulding machine<\/strong> variants (HGY50-V3-EV, HGY150-V4-EV, HGY200-V4-EV, HGY250-V4-EV) deserve specific attention in the lightweighting context because their servo-electric drives provide more precise injection speed and pressure profiles than hydraulic systems. In lightweighted bottle production, the preform wall thickness at each axial position is set by the injection filling dynamics. A servo-electric injection unit with closed-loop velocity control can reproduce the filling profile within \u00b10.5% cycle to cycle, versus \u00b12\u20133% variability for standard hydraulic injection. This repeatability difference translates directly into tighter wall-thickness tolerance in the blow bottle \u2014 which is the physical basis for reducing the design safety margin and therefore the minimum nominal wall thickness in a lightweighted design.<\/p>\n<\/div>\n

<\/p>\n

\n

5. Manufacturing Structure \u2014 Key Components Behind Consistent Light-weighted Output<\/h2>\n

The machine\u2019s ability to reliably produce lightweighted bottles depends on the precision and repeatability of four core hardware systems: the injection unit, the temperature-conditioning system, the stretch-blow assembly, and the mould.<\/p>\n

El injection unit<\/strong> uses a reciprocating screw with a diameter selectable between 40\u2009mm and 60\u2009mm (depending on model and throughput requirement), driven by Inovance or Yaskawa servo motors. The screw geometry is optimised for the resin family in use: PET requires a low-compression, low-shear screw to prevent acetaldehyde generation; PP requires a higher-compression design to handle its higher melt viscosity. The nano far-infrared energy-saving heating rings on the barrel deliver precise zone temperatures with fast response, reducing the thermal variation in the melt stream that causes injection-to-injection shot weight inconsistency \u2014 the root cause of preform weight variation that undermines lightweighted production yield.<\/p>\n

El temperature-conditioning station<\/strong> uses temperature-regulating cores and barrels that surround the preform body and bring it to a homogeneous profile suited for biaxial stretching. The integrated control box manages the temperature of each zone independently, with accuracy that translates into consistent molecular orientation depth in the bottle wall. American Parker high-pressure valves govern the blow air delivery, ensuring that the pressure rise rate in the bottle cavity is repeatable cycle to cycle \u2014 a critical parameter for achieving consistent wall thickness distribution in the blow phase.<\/p>\n

El S136 stainless steel moulds<\/strong> \u2014 produced in-house with compatibility across ASB-12M, Aoki 250, and ASB-70DPH mould formats \u2014 deliver the cavity dimensions and cooling channel geometry that define the final bottle\u2019s shape accuracy and cycle time. S136 tool steel\u2019s combination of high hardness (HRC 50\u201352 in the working condition), excellent polishability, and corrosion resistance makes it the industry standard for transparent bottle moulds where surface defects would be visible in the finished container. NSK Japan lead screws on the turntable rotation and station indexing axes provide the positioning accuracy (\u00b10.02\u2009mm) that ensures the preform is presented to each station at a precisely repeatable axial position \u2014 eliminating the preform misalignment that causes asymmetric wall distribution in the blow bottle.<\/p>\n<\/div>\n

<\/p>\n

\"Descripci\u00f3n<\/div>\n

<\/p>\n

\n

6. Material System \u2014 Resins Suited to ISBM Lightweighting<\/h2>\n

The choice of resin determines the achievable lightweighting depth, the orientation efficiency, and the regulatory compliance profile of the finished container. Each material processed by an m\u00e1quina de moldeo por inyecci\u00f3n, estirado y soplado<\/strong> has a characteristic stretch ratio range within which biaxial orientation is productive rather than destructive.<\/p>\n

\n
\n

PET (Polyethylene Terephthalate)<\/strong><\/p>\n

The dominant material for beverage, food, and personal care containers. PET responds exceptionally well to biaxial orientation in the ISBM process \u2014 strain-induced crystallisation during stretching produces a semi-crystalline wall with tensile strength of 150\u2013200\u2009MPa versus 50\u201380\u2009MPa for amorphous PET. This mechanical uplift enables 20\u201335% wall-thickness reduction versus conventionally blown containers while maintaining drop-impact and top-load performance. PET also delivers excellent oxygen and CO\u2082 barrier properties after orientation, relevant for carbonated beverage and oxygen-sensitive food applications.<\/p>\n<\/div>\n

\n

PETG (PET with Glycol Modification)<\/strong><\/p>\n

PETG remains amorphous after orientation but provides exceptional clarity and chemical resistance, making it the preferred choice for cosmetics, high-end personal care, and pharmaceutical primary packaging. It is more ductile than PET, which means it tolerates deeper draw ratios without whitening or stress-cracking \u2014 relevant for complex, asymmetric bottle shapes where uniform wall thinning is difficult to achieve. PETG is fully recyclable in the PET stream, addressing the end-of-life recyclability requirement that is increasingly explicit in Colombian packaging regulations.<\/p>\n<\/div>\n

\n

PP, PPSU, PC, Tritan, PLA<\/strong><\/p>\n

PP is used for hot-fill containers and baby bottles due to its sterilisation compatibility. PPSU and PC are used in premium reusable baby bottles requiring repeat steam sterilisation cycles. Tritan (Eastman) and PCTG are BPA-free copolyesters producing crystal-clear, impact-resistant containers for the premium segment. PLA (polylactic acid) enables compostable container production for foodservice and single-use applications targeting Colombia\u2019s municipal composting programmes in Bogot\u00e1 and Medell\u00edn. Each of these materials has a specific injection and stretching parameter range that the machine\u2019s programmable servo controls accommodate through material-specific processing recipes.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

<\/p>\n

\n

7. Surface Treatment \u2014 Achieving Premium Aesthetics at Lightweighted Wall Thickness<\/h2>\n

One of the design risks in lightweighting is that reduced wall thickness amplifies the visual impact of surface defects: flow lines, sink marks, gate blush, and optical distortion become more apparent in thinner walls because there is less material depth to diffuse the imperfection. The S136 stainless steel mould tooling used in the ISBM process is polished to optical mirror finish (Ra <0.1\u2009\u03bcm) in the bottle cavity, which transfers directly to the outer surface of the blown bottle. Because the bottle surface is formed under positive air pressure against the mould cavity wall \u2014 rather than by contact with a mandrel that physically deforms the surface \u2014 the finish quality is consistently replicable cavity to cavity and shot to shot.<\/p>\n

The controlled thermal profile of the one-step process also eliminates the crystallisation-induced haziness that affects reheat stretch blow moulding when process temperatures drift: in the ISBM machine, the preform has never been allowed to crystallise before blowing, so the bottle wall remains amorphous (for PET\/PETG\/Tritan) or achieves only the controlled strain-induced crystallinity that produces strength without haziness. This is the physical reason why ISBM bottles achieve higher optical clarity at equivalent or lower wall thickness than two-step RSBM bottles \u2014 a quality point that is commercially relevant in Colombia\u2019s premium cosmetics and nutraceutical bottle market where clarity is a direct proxy for product quality in the consumer\u2019s perception.<\/p>\n

Post-moulding surface treatments \u2014 labelling-adhesion corona treatment, sleeve-label-compatible surface energy, UV-protective coating for pharmaceutical containers \u2014 can be applied in-line or offline. The consistent surface energy and low roughness of ISBM bottles (compared to extrusion blow moulded equivalents) reduce the corona treatment power required for labelling adhesion, which is an indirect energy saving that adds to the machine\u2019s overall sustainability profile.<\/p>\n<\/div>\n

<\/p>\n

\n

8. Environmental Grade \u2014 ISBM Lightweighting as a Regulatory Compliance Tool<\/h2>\n

The environmental grade of a plastic container \u2014 its compliance with applicable material, recyclability, and waste-reduction regulations \u2014 is directly linked to its resin content per unit volume. Lightweighted bottles produced on an m\u00e1quina de moldeo por inyecci\u00f3n, estirado y soplado<\/strong> score better on all major sustainability metrics used in current and forthcoming Latin American packaging legislation.<\/p>\n

Colombia \u2014 Ley 1819 de 2016 and Resoluci\u00f3n MADS 2019<\/h3>\n

Colombia\u2019s packaging waste framework is anchored in the Pol\u00edtica de Gesti\u00f3n Integral de Residuos S\u00f3lidos<\/strong> and the extended producer responsibility obligations under Resoluci\u00f3n 1407 de 2018 del Ministerio de Ambiente y Desarrollo Sostenible (MADS)<\/strong>, which establishes collection and management targets for packaging waste including plastic containers. The Plan de Gesti\u00f3n Ambiental de Residuos de Envases y Empaques<\/strong> requires packaging producers to demonstrate progressive waste reduction targets. Lightweighting directly reduces the mass of packaging waste per unit sold, contributing to compliance with these targets. Additionally, Ley 1819 de 2016 introduced a plastic bag tax; while it does not directly apply to ISBM bottles, it establishes a policy direction that industry analysts expect to extend to single-use plastic containers in future legislative cycles. Producers using ISBM lightweighting are positioning their portfolios ahead of this likely regulatory expansion.<\/p>\n

European Union \u2014 EU Packaging and Packaging Waste Regulation (PPWR) 2024<\/h3>\n

The revised EU Packaging and Packaging Waste Regulation, entering into force progressively from 2025, establishes minimum recycled content requirements (30% by 2030 for contact-sensitive plastic packaging) and mandatory packaging minimisation requirements \u2014 mandating that packaging weight and volume be reduced to the minimum necessary for safety, hygiene, and functionality. ISBM-lightweighted PET bottles using recycled PET (rPET) in their preform formulation satisfy both dimensions of this regulation. Colombian exporters supplying the EU market with food, beverage, or cosmetic products in ISBM bottles benefit from this dual compliance positioning.<\/p>\n

United States \u2014 EPR State Legislation and FDA Food Contact<\/h3>\n

US states including California (SB 54, 2022), Oregon, and Washington have enacted extended producer responsibility legislation requiring plastic packaging to achieve minimum recycled content percentages and recyclability standards. ISBM PET bottles are already compatible with the established curbside recycling infrastructure and meet FDA 21 CFR regulations for food contact packaging, making them the preferred container format for US-market-bound Colombian food and beverage exports.<\/p>\n

Brazil \u2014 Acordo Setorial de Embalagens and ABNT NBR Standards<\/h3>\n

Brazil\u2019s sectoral agreement on packaging waste (Acordo Setorial de Embalagens) under the Pol\u00edtica Nacional de Res\u00edduos S\u00f3lidos (PNRS \u2014 Lei 12.305\/2010) requires producers to participate in reverse logistics schemes for packaging. ABNT NBR standards for plastic packaging (including NBR 13230 for recyclability identification marking) apply to ISBM bottles. The reduced resin mass per container achieved through lightweighting reduces the total plastic mass entering the reverse logistics stream per unit sold \u2014 a direct benefit within the Brazilian regulatory accounting framework.<\/p>\n<\/div>\n

<\/p>\n

\n

9. Operating Characteristics \u2014 What Defines a Successful Lightweighting Run<\/h2>\n

A lightweighting production run on an m\u00e1quina de moldeo por inyecci\u00f3n, estirado y soplado<\/strong> differs from standard production in several process parameter dimensions. The preform wall thickness is thinner, which means the injection fill time is shorter and the injection pressure profile must be adjusted to avoid short shots or flash. The temperature conditioning window is narrower \u2014 a thinner preform reaches blow temperature faster and cools faster if the station dwell time is too long. The stretch ratio is higher \u2014 the blow mould is proportionally larger relative to the preform volume \u2014 which means the blow air pressure rise rate must be calibrated to avoid the preform breaking at the gate zone before the air column has fully extended. All of these interactions require that the machine\u2019s servo control system be capable of storing and executing material- and weight-specific processing recipes, and that the operator has access to the technical knowledge to set these parameters correctly.<\/p>\n

Key operating parameters and their nominal ranges for lightweighted PET production on a representative 4-station ISBM machine are summarised in the Technical Specifications table below. These parameters are starting points for process development; actual production-ready settings will be refined over a mould trial period.<\/p>\n

Energy consumption is a defining operating characteristic of the one-step process. Because the preform is never cooled to ambient and then reheated, the thermal energy invested in plasticising the resin is utilised directly in the blow phase \u2014 the machine effectively retains the enthalpy of the melt rather than wasting it to ambient and repaying it with an infrared oven. This results in the widely cited 40% energy saving versus two-step RSBM for equivalent output. On an 8-hour shift producing 40,000 units, this energy differential amounts to approximately 80\u2013120\u2009kWh of electricity saving \u2014 at Colombian industrial electricity tariffs, this represents a direct operating cost advantage that compounds over a multi-year machine life.<\/p>\n<\/div>\n

<\/p>\n

\n
\n