How to Troubleshoot Common Issues in Customized Rubber Parts Manufacturing |

Custom rubber parts are utilized far and wide because of their high flexibility and the easily adaptable necessities of the industries and industrial sectors over the globe. But in a real manufacturing process, there are often a lot of issues, which cause product quality and production efficiency. It is said that the most need effective diagnosis and preakness of custom rubber parts production cost control. This paper aims to systematically show the four angles of the diagnostic when facing the problem during the manufacture of custom rubber parts from the relationships of itVentory, Mould, Process, and Equipment, and provide reference for practitioners in the relevant field.

Contingent Power — oversight and constraint

It is the rubber material that plays the role of performance of customized rubber parts, and the material problem is one of the important factors affecting product defects.

1.1 Poor mixing of material: Due to the poor mixing of materials will lead to the uneven physical properties of rubber products, such as: hardness, tensile strength, etc.

Diagnosis method: See if rubber parts surface exists color dispersion or foreign body. Check hardness test to make sure hardness is consistent between all components. The tensile test is performed to find out if the tensile strength and elongation of the material satisfy the requirement.

So, lets move on: Optimizing mixing of the Compounds, so that it would even influence the rubber matrix homogeneity. This allows control of the blending effect by controlling blend time and blend degrees. Cycle check mixer is running condition normal.

1.2 Aging and failure of materials: Factors such as storage temperature, humidity, and light will cause rubber materials to gradually age and fail, resulting in performance degradation.

Diagnostics: checking the time and storage conditions of rubber raw materials. Rubber raw materials check for various properties such as discoloration, sticky or caking phenomenon.

Solution: Always keep strict rubber raw material storage, avoid sun exposure, do not long time to high temperature, humidity. You need to manage your own and it does not stick to the first in and first out principle.

1.3 Belt material error: The rubber selected for more recent batch cannot endure the conditions the pieces are placed in (for example, not heat resistant, oil-resistant, etc.)

Diagnosis Approach Rubber parts use working environment (temperature, humidity, contact medium, etc.) detailed analysis, and then whether the performance parameters of rubber material meet the requirements.

Answer ( Select Suitable Rubber Based on the Working Environment of Rubber Parts The rubber parts have specific need, we engineer this synthetic rubber material to ensure it provides maximum properties.

Maintenance and optimization Dew evaporated, but second mold problem:

One of these is mold problems, and mold is actually among the most important methods and devices utilized to form customized rubber components.

2.1 The mold precision is not accurate: the mold precision is high, the size of rubber parts can not meet the required assembly performance.

2 periphery equipment: ·Diagnostics:  using precision measuring instruments (coordinate measuring instrument (CMM)) measuring the size of the mold, testing whether there is an out of tolerance phenomenon.

Fix or eliminate the mold (solution). This process should be done at least once in 2 weeks, you can wash bleach to avoid mold, otherwise it will wear out black, lead to a decrease in mold accuracy.

2.2 The fuzz-dusting: If there is no mold exhaust, bubbles will form in the rubber parts, and the mechanical properties will decrease.

Inspection: Look for bubbles or pits in the surface of the rubber. “You make one rubber cut, and you check if there’s air.

Solution: Increase vent holes from mold, bigger the vent hole Beach land shifts on the smooth discharge gas(explicit)

2.3 Mold surface roughness: The surface roughness of the mold will affect the surface appearance of the rubber parts.

Check rubber components of burrs, scratches. Measurement of surface roughness value on die using roughness meter

Polishing the die face to reduce surface ruggedness. will then oxidize or corrode and will need to be cleaned to restore to a smooth surface.

3, trouble- shooting process: adjusting + optimizing

The formulation of process parameters for rubber parts is one of the key factors affecting product quality, and unreasonable process parameters can cause all kinds of quality problems.

3.1 Under uncured OR long cure time: no curing parts fracture strength, too long parts were embrittlement.

The tensile test, rubber parts tensile test and its pull strength does not meet the requirements. It is used to show whether there are under-sulfur or over-sulfur phenomenon on the surface of rubber parts.

Answer: Based on the rubber property and the thickness of parts, determine the vulcanization time for rubber. Vulcanization curve test was conducted to determine the best vulcanization time.

Because vulcanization speed is high or low temperature, vulcanization temperature is too high will let the rubber components burnt, too low the vulcanization is not hollow.

Diagnosis: Check whether the surface of the rubber part burnt/stick or not Hardness test is used to evaluate the stability of the rubber compounding.

Solution: Set vulcanized working temperature according to rubber material performance. The molecular temperature control system of the newly qualified mold should avoid temperature fluctuation and continue normal operation.

3.3 No problem with a good injection pressure: Too high an injection pressure will overflow the rubber parts, and too low will lead to unsatisfactory mold filling.

How to use: See if it has overflow or not the rubber parts surface phenomenon. Ensure that the sizes of rubber pieces are satisfied.

Solution: Keep proper injection pressure based on the fluidity of rubber material.” Design of the inlet of the mold-adopt for high filling efficiency

Fourth: with gear: maintenance and adjustment

But, for the manufacturing process of rubber parts, the equipment work state has a direct impact on rubber parts production efficiency and product quality. So here it is important to diagnose and timely solve the equipment problem.

4.1: Injection machine failure: The injection machine failure, will cause the injection pressure is unstable, temperature control failure and so on.

Diagnostic procedures: Check the hydraulic, electrical and control systems of the injection molding machine to verify the fault. It figures out if injection machines work fine or they have any noise problem or vibrating.

Problem: That has led to injected machines maintenance or spare parts change. In order to obtain the good working condition of the injection machine, it is necessary to carry on to the injection machine regular maintenance and maintenance, prolong the service life of the injection machine.

4.2 vulcanizing machine failure: the failure of propane machine, the cause of inadequate temperature control, pressure instability and other faults.

6 Steps in Troubleshooting this Paper Bag Forming MachineEach of the constituent part of the paper bag forming machine is examined and any malfunction is diagnosed. Whether the sound vibration of the vulcanizer is normal?

Vulcanizers and components will be repaired. To extend the service life of the vulcanizing machine, we must have regularly maintenance and maintenance.

4.3 Air compressor breakdown: Due to insufficient air pressure, pneumatic equipment can not normal working.

DiagnosticsMethod: Check whether air compressor gas storage tank and supply pressure is not enough. Besides, it needs to monitor air compressor function, noise, vibration and whether there's an exception.

Can either be replaced or attimes, air compressor components can be repaired. often on check the air compressor repair train.

V. Conclusion

Some problems are encountered in theering of Rubber Parts Rubber Parts, and the solutions to sub and solution problems are closely related, they generally need to be from the material, mold, process, equipment, etc. When Finding Problems, in turn, Need to Analyze, its systematic analysis of the causes and solutions of problems is closely related, it can effectively improve the quality of products and effectively reduce production costs and turnkey competitions of enterprises. The front-line personnel training should be strengthen, improve the analysis and problem-solving ability, formulate a set of perfect quality management system, so that the manufacturing technology of customized rubber pieces is stable and reliable;