Injection Molding Machine Inspection Manual PDF

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Summary

Injection Molding Machine Inspection Manual ver. 2.2 APRIL, 2013 SEMA Mould & Die Team Research & Development Overview of Injection Molding Machine Inspection Manual What is Injection Molding Machine Inspection Manual? Injection Molding Inspection Manual is a basic description of SEC Digital...

Description

Injection Molding Machine Inspection Manual ver. 2.2

APRIL, 2013

SEMA Mould & Die Team Research & Development

Overview of Injection Molding Machine Inspection Manual

What is Injection Molding Machine Inspection Manual? Injection Molding Inspection Manual is a basic description of SEC Digital Appliance Division about how to check the performance of Injection molding machine under control of SEC subcontractors of mass production.

Purpose and Object of Injection Molding Machine Inspection Manual Injection Molding Machine Inspection Manual presents SEC subcontractors of mass production with a basic principle of injection molding machines performance inspection which regulates the control skill to maintain the original performance of injection molding machine, eventually improves productivity and quality of the products. Injection Molding Machine Inspection Manual instructs SEC subcontractors of mass production how to inspect machines on the basis of the criteria, introducing measuring method, measuring tools and equipment, working procedure, and calculation method, eventually make an inspector carry out his task with ease.

Contents

1. Check Items & Standard ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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1-1. Check Items∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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1-2. Inspection Criteria ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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1-3. Check Sheet ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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1-4. Measuring Tool∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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1-5. Affection on Products by Check Items∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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2. Inspection Method ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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2-1. Injection Pressure∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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2-2. Injection Speed∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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2-3. Clamping Force ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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2-4. Parallelism∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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2-5. Back Flow∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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2-6. Reproducibility∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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2-7. Barrel Temperature∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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3. Inspection Manual Revision History ∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙∙

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1. Check Items & Standard

Selects 7 items most relevant to the product quality among those from which you can identify the current condition of injection molding machines and presents the minimum criteria for each machine performance item to maintain the product quality.

1-1. Check Items - Machine performance check items - Machine performance check points (Check item composition diagram)

1-2. Inspection Criteria - Detailed criteria of machine performance - Measures by machine performance grades

1-3. Check Sheet - Usage of check sheet - Example of check sheet

1-4. Measuring Tool - When measuring tools are included in machines - When you need additional measuring tools

1-5. Affection on Products by Check Items - Examples of product defects by check items -4-

1-1. Check Items Injection Molding Machine Performance Check Items Selects and measures 7 items most relevant to the product quality.

Check Items

Injection Pressure

Details

The pressure imposed on melting materials on the edge of the screw. It controls the molding resistant force inside a cavity to determine the molding dimension and strength. Without a pressure sensor on the nozzle part, the hydraulic piston pressure would take its place for measurement.

Injection Speed

Clamp Force

The screw speed to fill the melting material in the cavity and determine the appearance grade of molded goods.

The max force to fasten the mould. It shall be stronger than the resin pressure inside the mould to prevent the mould from being open.

Parallelism

The degree of parallel between the fixed platen and the movable platen. It indicates how severely the machine level is distorted, affecting wear of the mould directly.

Backflow

The degree of melting resin spill, that is, the degree of screw wear. It affects product shrinkage and reproducibility in the event of backflow.

It is a judgment criteria for production uniformity and Injection Reproducibility molding precision. It is also used to check the operation of back pressure.

Barrel Temperature

The temperature measured at the longitudinal hole of barrel. It plays a decisive role in the stability of supply performance and molded material transportation as it affects the resin melting point.

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1-1. Check Items Injection Molding Machine Performance Check Points Clamp Force

Injection Pressure Parallelism Reproducibility Barrel Temp. Backflow

[Check Item Composition Diagram]

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Injection Speed

1-2. Inspection Criteria Detailed Criteria of Machine Performance • Provide Weight in proportion to the importance, dividing the size into Small & Medium and Large. • Repair is necessary for Grade C or under for each check point. Inspection Criteria Check Point

Injection Pressure

Injection Speed

Clamp Force

Basis of Measurement

Actual Value Deviation (Small) < 200 Ton < 1%

< 5%

A (5P)

15

Good

< 3%

< 10%

B (4P)

12

Normal

< 5%

< 15%

C (3P)

< 7%

< 20%

D (2P)

6

≥7%

≥20%

E (1P)

3

< 1%

< 5%

A (5P)

15

Good

< 3%

< 10%

B (4P)

12

Normal

< 5%

< 15%

C (3P)

< 7%

< 20%

D (2P)

6

≥7%

≥20%

E (1P)

3

< 5%

< 5%

A (5P)

15

Good

< 10%

< 10%

B (4P)

12

Normal

< 15%

< 15%

C (3P)

< 20%

< 20%

D (2P)

≥20%

≥20%

E (1P)

3...