OEM Workflow for Custom Silicone Hose Projects

Hotop executes custom silicone hose OEM projects following APQP-aligned development discipline, designed for automotive Tier 1 / Tier 2 and industrial serial programs. Our workflow locks requirements, mitigates design and process risks, delivers validated samples, completes PPAP approval, and transitions smoothly into stable series production.

Submit 2D/3D Drawings for DFM Review

Hotop Project Stages

1. RFQ & Requirement Lock

Submit your 2D drawing, 3D CAD, specification sheet or reference sample. Our engineering and quality team reviews application conditions, media compatibility, temperature range, pressure rating, tolerance, color, reinforcement structure and material grade (MVQ, platinum-cured, fluorosilicone lined etc.). We clarify scope, tooling responsibility, sampling schedule and commercial terms before formal quotation. NDA can be activated upon request.

2. DFM Review & Feasibility Assessment

Design for Manufacturability review is our core upstream gate. We evaluate wall thickness, mandrel demolding, flash control, reinforcement alignment, end fitting geometry, shrinkage and dimensional stability. We issue DFM comments and recommended design adjustments to avoid rework during tooling trial and sampling.

3. Tooling Fabrication & First Trial

Once DFM is mutually approved, dedicated mandrels / tooling are manufactured per controlled drawing. We carry out first trial run, inspect as-built dimensions, surface finish and extrusion/molding consistency. Trial records and first-article data are retained in the project file.

4. Prototype Sampling & Validation

We produce pre-production samples for your bench, pulse, burst, thermal cycling and system testing. All samples are traceable to material batch and trial record. We collect test results, address non-conformities and update the process before PPAP package preparation.

5. PPAP Submission & Customer Approval

We prepare and submit PPAP package (default Level 3, adjustable per your SQE requirement). PPAP approval is a mandatory gate before release to series production. Approved golden samples and control plan become the baseline for all future production.

6. SOP Release & Handover to Series Production

After PPAP sign-off, the project is formally released for SOP. All project documents, control plan, SPC rules, material specifications and change rules are handed over to our production and quality team. From this point onward, the program is governed under our Series Production Control process for traceability, ECN management, in-line inspection and delivery coordination.

What We Control Across the Workflow

• Clear gate reviews between each phase; no uncontrolled forward skip
• Full document traceability for automotive IMDS and material declaration
• Single point project engineer assigned for your program
• Formal deviation and change request channel before and after SOP
• All records retained to meet IATF 16949 retention requirements

Next Step in Our OEM Program

After workflow alignment, review our Tooling & NDA terms covering ownership, confidentiality and dedicated tooling governance. When PPAP is ready, refer to APQP Deliverables for the full quality package scope. Once SOP starts, our Series Production Control framework sustains consistent supply. Browse OEM Case Studies for reference of similar silicone hose programs we have delivered.