Our Polystyrene PS Injection Molding Services

Eleve sua produção com a primeira camada da Yigu Technology Poliestireno (Ps) Serviços de moldagem por injeção—where precision meets versatility. Whether you need transparent packaging, lightweight consumer products, or high-volume electronic components, we leverage our injection molding expertise, ferramentas personalizadas, and strict quality control to deliver cost-effective, customizable PS parts tailored to your industry needs.​

polystyrene ps injection molding
polystyrene ps injection molding

O que é poliestireno (Ps) Moldagem por injeção?

Poliestireno (Ps) is a widely used thermoplastic polymer made from styrene monomers, celebrated for its clarity, acessibilidade, e facilidade de processamento. Moldagem por injeção is a manufacturing process that melts plastic pellets, injects the molten material into a custom mold cavity, cools it, and ejects the finished part. Combinado, PS injection molding produces consistent, high-quality components for diverse sectors, leveraging PS’s unique traits to meet various application demands.​

Definições -chave & Process Overview​

TermoDefinição
Poliestireno (Ps)A thermoplastic with two main forms (rigid and foam); known for clarity, leve, and low cost.​
Moldagem por injeçãoA cyclic mass-production process: PS pellets → melted → injected into mold → cooled → ejected (repeats for efficiency).
Cavidade do moldeThe hollow space in a mold that shapes the final PS part; can have 1–128 cavities for high-volume output.​

Material Properties of PS​

PS’s distinct properties make it ideal for injection molding. Below are the most critical traits for manufacturers and buyers:

  • Clarity and Transparency: Amorphous PS (general-purpose PS) tem 90% light transmittance—comparable to glass, making it perfect for visible packaging.​
  • Densidade: 1.04–1,06 g/cm³ (leve, reducing shipping costs and part weight for consumer goods).
  • Ponto de fusão: 140–180 ° C. (low melting temperature, lowering energy consumption during molding).
  • Fragilidade: Rigid PS is brittle (força de impacto: 1.5–2.5 kJ/m²), but can be modified with rubber additives for toughness.​

Ease of Processing: Low viscosity when melted, filling complex mold details easily—ideal for intricate parts.

Nossas capacidades: Delivering Top-Tier PS Injection Molding Solutions

Na tecnologia Yigu, nosso PS injection molding expertise is built on advanced equipment, skilled engineering, and a focus on solving client challenges—from small-batch custom parts to large-scale production runs. We prioritize precision and quality to ensure your PS components meet the highest standards.​

Recuperação de recursos do núcleo

CapacidadeDetalhesBenefícios para você
Ferramentas personalizadasIn-house mold design and fabrication (aluminum for prototypes, hardened steel for long-run PS parts).Molds tailored to your part’s geometry (Por exemplo, intricate packaging or electronic casings); lead times as short as 2–3 weeks.​
Moldagem por precisãoCNC-controlled injection machines with ±0.003mm tolerance; in-line vision inspection for dimensional accuracy.​Ideal for small, peças detalhadas (Por exemplo, componentes de dispositivos médicos, conectores eletrônicos) that require tight specs.​
Produção de alto volume30+ Máquinas de moldagem por injeção (50–600 tons clamping force) with automated feeding and ejection systems.​Capacidade de produzir 800,000+ PS parts/month; lower unit costs for bulk orders (Por exemplo, embalagem, bens de consumo).
Controle de qualidade (QC)Verificações em linha (para clareza, precisão dimensional) and post-production testing (impacto, Resistência ao calor); ISO 9001 certified.​99.7% taxa livre de defeitos; ensures PS parts meet your industry’s quality standards (Por exemplo, FDA para embalagem de alimentos).

The PS Injection Molding Process: Step-by-Step Excellence

PS’s unique melting and cooling properties require a optimized process to avoid defects like warping or cloudiness. Our workflow ensures consistent quality while maximizing efficiency.​

Etapa 1: Preparação do material

  • Pellet Selection: Choose between general-purpose PS (Gpps, para clareza), high-impact PS (QUADRIS, por resistência), or foam PS (EPS, for insulation).
  • Additive Blending: Mix PS pellets with aditivos (UV stabilizers for outdoor use, colorants for branded parts, rubber modifiers for impact resistance).
  • Secagem: PS absorbs minimal moisture, but we dry pellets at 60–70°C for 1–2 hours to prevent surface defects (Por exemplo, bubbles in transparent parts).

Etapa 2: Mold Design​

  • Clarity Considerations: Molds for transparent PS parts have polished surfaces to maintain clarity (no scratches or texture that reduces light transmittance).
  • Cooling Optimization: Molds include uniform cooling channels to prevent warping—critical for thin-walled PS parts (Por exemplo, embalagem).
  • Prototype Testing: We 3D-print mold prototypes first to validate design (reduces costly revisions and ensures part functionality).

Etapa 3: Injection Parameters (Critical for PS)

PS’s low melting point and viscosity require precise parameter tuning. Below are our standard settings for GPPS (the most common PS grade):

ParâmetroIdeal Range for GPPS​Propósito
Temperatura do barril160–200°C​Melts PS evenly without degradation (higher temps cause yellowing).
Pressão de injeção40–100 MPa​Preenche cáries de molde completamente (critical for intricate details like packaging logos).
Tempo de resfriamento10–25 seconds​Prevents warping; balances speed and part stability (shorter for thin parts).

Etapa 4: Post-Molding Operations​

After demolding, PS parts may undergo:

  • Aparar: Removendo o excesso de plástico (clarão) with automated tools (critical for clear parts to maintain aesthetics).
  • Conjunto: Joining parts via adhesives or snap-fits (for complex components like consumer product enclosures).

Inspeção: Final QC checks for clarity, precisão dimensional, e qualidade da superfície (100% inspection for medical or food-contact parts).

Materiais: Choosing the Right PS for Your Project

Not all PS is the same—selecting the right grade ensures your parts meet performance, custo, and aesthetic goals. We offer a full range of PS materials, plus recycled options.​

Types of PS for Injection Molding​

PS Type​Key Traits​Aplicações comuns
PS (Gpps)Claro, rígido, baixo custo (≈​1.20–1.80/kg).Embalagem (recipientes de comida, Blister pacotes), electronic casings (Controles remotos), toys.​
Ps de alto impacto (QUADRIS)Difícil, resistente ao impacto (força de impacto: 10–20 kJ/m²), opaque.​Bens de consumo (peças do aparelho, Carros de brinquedo), Aparelho interior automotivo, Capas de dispositivos médicos.
Expandable PS (EPS)Foam-like, leve (densidade: 0.015–0.04 g/cm³), excellent insulation.​Embalagem (protective inserts for electronics), disposable food containers, construction insulation.​
Styrene-Acrylonitrile (SAN)Resistente ao calor (até 90 ° C.), resistente a produtos químicos, clear.​Embalagem de alimentos (coffee cups), recipientes cosméticos, componentes de dispositivos médicos.

Material Selection Tips​

  1. Prioritize clarity: For visible packaging (Por exemplo, Blister pacotes), choose GPPS or SAN.​
  1. Need toughness?: Opt for HIPS (ideal for parts prone to drops, like toy cars or appliance handles).

Embrace sustainability: Nosso recycled PS (rPS) is made from post-consumer waste (Por exemplo, old packaging) and retains 85% of the performance of virgin PS—perfect for eco-friendly brands.

Tratamento de superfície: Enhancing PS Parts’ Aesthetics & Funcionalidade

PS’s natural surface is smooth (especially GPPS) but can be modified to improve grip, marca, ou durabilidade. We offer five core surface treatments tailored to PS’s properties:

TratamentoProcessoBenefícios
Acabamento superficialPolimento (for GPPS to boost clarity) or sandblasting (for matte finishes).Aprimora a estética (clear parts look more premium) or reduces glare (Por exemplo, electronic casings).
TexturaAdicionando padrões (com nervuras, dotted, ou toque suave) to the mold surface.​Melhora a aderência (Por exemplo, toy handles, Appliance Knobs) or hides fingerprints (Por exemplo, bens de consumo).
RevestimentoAplicando uma camada fina (Por exemplo, acrílico, poliuretano) to the PS surface.​Boosts scratch resistance (critical for clear packaging) or UV protection (peças ao ar livre).
PinturaSpray-painting with PS-compatible primers (prevents paint peeling).Cores personalizadas para a marca (Por exemplo, peças de brinquedo, Aparelho automotivo) or opaque finishes (for HIPS).
ImpressãoDigital printing or screen printing for logos, Rótulos, or instructions.​Claro, durable markings (Por exemplo, food packaging expiration dates, medical device labels).

Vantagens: Why Choose PS Injection Molding?

PS injection molding offers a unique blend of cost savings, estética, and versatility—making it a top choice for manufacturers across industries.​

Key Advantages of PS Injection Molding​

  • Custo-efetividade: PS is one of the cheapest thermoplastics (GPPS costs ​1.20–1.80/kg), and injection molding’s high volume drives unit costs down to ​0.05–0.30 per part (ideal for high-volume items like packaging).
  • Clarity and Transparency: GPPS has 90% light transmittance—cheaper than glass or acrylic, making it perfect for packaging where product visibility matters (Por exemplo, candy, eletrônica).
  • Customizabilidade: Molds can create complex shapes (Por exemplo, intricate toy parts, custom packaging), and PS accepts additives for color, Resistência a UV, or toughness.​
  • Leve: PS’s density (1.04–1,06 g/cm³) é 50% less than glass and 30% less than ABS—reducing shipping costs and improving user comfort (Por exemplo, lightweight toy parts).
  • Ease of processing: PS melts at low temperatures (economiza energia) and has low viscosity (fills small mold details easily)—reducing production time and defects.​

PS vs. Other Common Injection Molding Plastics (for Clarity-Critical Applications)

MaterialCusto (por kg)Light Transmittance​Força de impacto (KJ /)Melhor para
Gpps​1.20–1.80​90%1.5–2.5​Low-cost clear packaging, toys.​
Acrílico (PMMA)2,50-3,5092%2.0–3.0​High-end clear parts (Por exemplo, Exibir casos).
BICHO DE ESTIMAÇÃO​1.80–2.50​88%5.0–7.0​Durable clear packaging (Por exemplo, garrafas de água).

Indústria de aplicativos: Where PS Injection Molding Shines

PS’s versatility—from clarity to toughness—makes it indispensable in five key industries. Below are real-world use cases and our tailored solutions:

IndústriaCommon PS Parts​Nossas soluções
EmbalagemBlister packs, recipientes de comida, protective inserts (EPS), cosmetic jars.​GPPS for clear packaging; EPS for shock-absorbent inserts; FDA-compliant grades for food contact.​
Produtos de consumoPeças de brinquedo, appliance handles (QUADRIS), Controles remotos, disposable cutlery.​HIPS for impact-resistant parts; GPPS for colorful, clear toy components; custom tooling for unique shapes.​
Dispositivos médicosDisposable syringes (SAN), Tubos de teste, caixas de dispositivo (QUADRIS).Sterilizable PS grades; Processos certificados ISO 13485; precision molding for small, peças precisas.
AutomotivoEnteamento interno (QUADRIS), cup holders, painéis de porta, speaker grilles.​HIPS for impact resistance; UV-stabilized additives for long-term durability; custom colors to match car interiors.​
EletrônicaRemote control casings (Gpps), Laptop molduras (QUADRIS), LED diffusers.​Precision molding for tight-fitting parts; flame-retardant additives (meets UL94 standards); textured finishes to hide fingerprints.​

Estudos de caso: Our PS Injection Molding Success Stories

We’ve helped clients across industries overcome challenges with our PS injection molding services. Abaixo estão três projetos de destaque:

Estudo de caso 1: Clear GPPS Blister Packs for a Cosmetics Brand​

  • Desafio: A cosmetics brand needed 500,000 blister packs that were clear (to showcase products), baixo custo, and durable enough to withstand shipping.​
  • Solução: We used GPPS (90% clareza) with a scratch-resistant coating and custom tooling to match the brand’s logo and product shapes. Molds had 32 cavities for high-volume production.​
  • Resultados: Blister packs reduced packaging costs by 20% vs.. acrylic alternatives; 99.8% entrega no prazo; customer feedback praised the clear visibility of products.​

Estudo de caso 2: Impact-Resistant HIPS Toy Parts for a Toy Manufacturer​

  • Desafio: A toy company needed 300,000 toy car bodies that were tough (to withstand drops), colorful, e leve.
  • Solução: We used HIPS (força de impacto: 15 KJ /) with color additives and custom tooling for intricate designs (Por exemplo, poços da roda, Logos). In-line QC checked for cracks and color consistency.​
  • Resultados: Toy parts had 0 breakage in drop tests (from 1.5m); production time reduced by 15% vs.. their previous supplier; cost per part lowered by 12%.​

Estudo de caso 3: Sterilizable SAN Medical Test Tubes for a Lab Supply Company​

  • Desafio: A lab supply company needed 100,000 test tubes that were clear, heat-sterilizable (up to 121°C), e resistente a produtos químicos (to acids/bases).
  • Solução: We used SAN (resistente ao calor, claro) with FDA-compliant additives and precision molding (± 0,005 mm de tolerância) to ensure uniform tube diameter. Post-molding sterilization validation was conducted.​

Resultados: Test tubes met ISO 13485 padrões; 100% passed sterilization tests; entregue 1 week ahead of schedule—helping the client meet urgent lab demand.

Why Choose Us for Your PS Injection Molding Needs?

With so many PS injection molding suppliers, A tecnologia Yigu se destaca por nossa experiência, qualidade, e compromisso com o sucesso do cliente. Here’s why you should partner with us:

  1. Especialização: 12+ years specializing in PS injection molding—our engineers know how to optimize processes for PS’s unique traits (Por exemplo, preventing yellowing in GPPS, boosting impact strength in HIPS).
  1. Garantia de qualidade: ISO 9001 e ISO 13485 Certificações; 99.7% taxa livre de defeitos; 100% Inspeção para peças críticas (Por exemplo, medical test tubes, embalagem de alimentos).
  1. Atendimento ao Cliente: Dedicated account managers who work with you from design to delivery; Consultas de design gratuitas (to optimize your part for PS molding); 24/7 support for urgent orders.​
  1. Inovação: Nós investimos 7% de receita em r&D—recent breakthroughs include bio-based PS (made from plant-based styrene) and high-clarity rPS (recycled PS with 88% Transmitância de luz).

Sustentabilidade: 40% of our PS materials are recycled (rPS); our factories use energy-efficient machines (reduzindo as emissões de carbono por 28%); we offer a take-back program for old PS parts to recycle into new products.

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