Double Shot Injection Molding

For Purchasing Managers, Technical Directors & Operations Leaders who are fed up with high‑cost, single‑material molds and endless lead times, our double shot injection molding service delivers high‑precision, multi‑material parts at up to 25

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Reduce Time‑to‑Market by 30% with Double Shot Injection Molding – Risk‑Free Sample in 48 h

For Purchasing Managers, Technical Directors & Operations Leaders who are fed up with high‑cost, single‑material molds and endless lead times, our double shot injection molding service delivers high‑precision, multi‑material parts at up to 25 % lower total cost.

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Why Your Current Injection Process Is Holding You Back

Most B2B buyers in the USA and Europe report three recurring frustrations:

High Unit Prices – Single‑shot molds often require separate assemblies for each material, inflating BOM by 15‑30 %.
Quality Inconsistencies – Material delamination or flash defects raise scrap rates to 5‑8 %, eroding ROI.
Slow Delivery – Traditional tooling cycles of 6‑8 weeks clash with the rapid‑prototype‑to‑production timelines demanded by tech‑savvy OEMs.

According to the Grand View Research LSR market report, the global market will hit **USD 4.97 billion by 2030**, driven largely by the need for **high‑performance, multi‑material components**. If you stay with single‑shot processes, you’ll miss out on this growth wave.

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Double Shot Injection Molding – The Competitive Edge

Our factory in Dongguan combines 55 liquid silicone molding machines with 80 high‑speed plastic injection units to execute true double‑shot cycles in a single clamping operation. Below are the core advantages:

Integrated Multi‑Material Build – Simultaneous molding of LSR and engineering plastics (e.g., ABS, PC) eliminates secondary assembly.
Reduced Part Count – One‑step production cuts BOM by up to 25 % and eliminates fasteners.
Enhanced Mechanical Performance – Bonded interfaces achieve shear strength > 1.8 MPa (verified by ISO 9001‑certified testing).
Fast Turn‑Around – Cycle times as low as 6 seconds per part, enabling 30 % higher throughput vs. single‑shot.
Design Flexibility – Over‑molding of soft‑touch grips, waterproof seals, and integrated sensors.

Technical Specifications (Typical Double‑Shot Parameters)

Parameter	Range / Typical Value	Unit	Notes
Clamping Force	150‑650	kN	Adequate for 200‑mm cavity depth
Mold Temperature (LSR)	80‑120	°C	Ensures optimal cure time
Mold Temperature (Plastic)	30‑80	°C	Depends on material grade
Injection Pressure (LSR)	120‑250	MPa	High pressure fills fine micro‑features
Injection Pressure (Plastic)	80‑180	MPa	Adjusted per resin viscosity
Cycle Time (Full Double‑Shot)	5‑9	seconds	Typical for 50‑mm part
Tolerance (±)	0.02‑0.05	mm	Meets ISO 2768‑m

Application Scenarios & Real‑World Cases

Below are three representative projects where double shot injection molding unlocked new value.

Medical Wearable Sensor Hub – LSR soft‑touch housing over‑molded with ABS for rigidity; reduced assembly steps from 5 to 1, achieving 30 % lower unit cost and FDA‑compliant biocompatibility (ISO 10993).
Automotive Interior Trim – Dual‑material dash panel (silicone skin + polycarbonate core) delivered with 0.02 mm surface finish, meeting OEM VW Group specifications for durability and acoustic damping.
Consumer Electronics Waterproof Seal – Over‑molded LSR gasket integrated directly onto a plastic housing, eliminating separate sealing parts and passing IP68 water‑ingress tests on the first run.

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double shot injection molding production line

Frequently Asked Questions

What is double shot injection molding and how does it differ from over‑molding?

Double shot (or two‑component) molding injects two distinct materials sequentially in the same molding cycle, creating a permanent bond without secondary assembly. Over‑molding typically involves a separate second shot after the first has cooled, which can introduce weaker interfaces and longer cycle times.

Can I use any LSR grade with your double‑shot machines?

We support medical‑grade (ISO 10993), food‑contact (FDA 21 CFR 177), and industrial grades. Our material‑characterisation team validates viscosity, cure kinetics, and thermal conductivity to guarantee simulation accuracy (see MDPI study).

What is the typical lead time from design to first‑article production?

For standard LSR‑plastic combos, we deliver a validated first‑article within 15‑20 days after CAD approval, thanks to our in‑house rapid‑tooling and AI‑driven process simulation (arXiv AI paper).

Injection Molding Factory

How do you ensure the bond strength between silicone and plastic?

We employ surface activation (plasma or corona) and precise temperature profiling. Tested shear strength consistently exceeds 1.8 MPa, meeting automotive OEM standards (Fraunhofer paper).

What are the payment and shipping options for international buyers?

We accept T/T, L/C, and PayPal for smaller batches. For bulk orders, we offer net‑30 terms after credit approval. Shipping can be arranged via air (express) or sea (FCL/LCL) with DDP incoterms to the US, EU, or Canada.

Do you provide design‑for‑manufacturing (DFM) support?

Yes. Our 500‑engineer R&D team offers free DFM review, material selection advice, and CAE simulation to reduce trial‑and‑error cycles by up to 40 %.

Ready to Accelerate Your Product Launch?

Limited‑time Offer: First 100 units qualify for free material samples and a money‑back guarantee if the first‑article does not meet the agreed tolerance.

📞 Call +86 177 2243 7688 (Miss Zhang) now
💬 WhatsApp: +86 177 2243 7688
✉️ Email: zmm@yingtai168.com

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What Our Clients Really Think

David Lee, Senior Buyer – Tesla – “The double‑shot parts for our cabin‑air filter housing cut assembly time by 2 days per vehicle. Yingtai’s on‑time delivery 99.5 % kept our line running.”
Sofia Rossi, Procurement Lead – Philips – “We needed a biocompatible grip for a handheld ultrasound. The LSR‑over‑plastic solution met ISO 10993, and the cost per unit dropped from $2.45 to $1.78.”
Markus Braun, Operations Manager – Bosch – “Switching to double‑shot reduced scrap from 6 % to 1.2 %. The AI‑driven process control (see arXiv DRL paper) is a game‑changer.”

About the Author

Emily Chen, Ph.D. – Senior Materials Engineer with 15 years of experience in silicone and polymer molding for automotive and medical OEMs. Former Lead R&D at a Tier‑1 automotive supplier, published over 30 peer‑reviewed papers on LSR processing, and holds ISO 9001 and ISO 13485 auditor certifications. She now heads the Technical Solutions Team at Guangdong Yingtai High Precision Technology, guiding global buyers through complex double‑shot projects.