diaphragm seals deburring, turning lines removal and polishing technology method of rubber and plastic product parts

How to deburr,deflash,remove turning lines of rubber, plastic diaphragm seal parts?

The diaphragm seal is a key component of pneumatic pumps and valves, diaphragm pump valve bodies and other products. Its main function is to perform the sealing function. It has been widely used in petrochemical, electric power, aviation, machinery and textile, medical and other industries. The main materials are PTFE polytetrafluoroethylene, Teflon and other polymer materials. There are slight burrs and turning lines in the production process, which will affect the sealing performance of the product. How to mechanically remove burrs and turning lines on the surface and reduce the roughness is a very troublesome problem. In this case, we will share a PTFE sealing diaphragm product high-efficiency deburring, removal of turning lines to reduce the surface roughness of the process technology and method. This finishing process solution is also suitable for deburring, deflashing and polishing of polymer products made of other materials such as polyester and resin.

    • jerrylu
    • 2024-06-05


Surface deburring, removing turning lines, finishing and polishing process for sealing diaphragms of rubber and plastic product parts

1. Plastic sealing diaphragm before polishing
burrs and turning tool lines of diaphragms sealing of plastic, rubber parts




surface burrs and turning tool lines




D40*20 mm

Pre-polishing process:

injection molding

Post-polishing process:


2. Finishing and polishing requirements
  • deburring, deflashing, removal of turning tool lines.
  • smooth surface with a roughness of Ra 0.5 or less.
3. Plastic sealing diaphragm polishing process details:
Polishing processes (1) deburring, removal of turning tool lines (2) reduce roughness of fine polishing (3) drying
Machine and equipment plastic parts polishing machine plastic parts polishing machine dryer
Speed highest highest highest
Abrasive media heavy cut ceramic deburring media porcelain polishing media no
Abrasive media to workpiece 4:1 6:1 no
Chemical compound cutting liquid fine polishing liquid no
Water appropriate amount,the liquid level is 30mm above the abrasive media appropriate amount,the liquid level is 30mm above the abrasive media no
Polishing time 30 minutes 30 minutes 5 minutes
Remark parts separated and picked up automatically, rinsed with water parts separated and picked up automatically, rinsed with water drying
4. The plastic sealing diaphragm removing turning tool lines after polishing
plastic,rubber parts sealing diaphragm deburring, removing turning lines
deburring,deflashing,removal of turning tool lines of plastic,rubber sealing diaphragm parts

5. Additional instructions
  • The burrs on the surface of the sealing diaphragm are relatively slight, but the turning tool lines are very deep. The rough finishing and polishing machine uses a special polishing machine for plastic products. Rough grinding uses coarse-grained abrasives media to achieve the effect of removing burrs and turning tool marks.
    Fine polishing uses precision finishing ceramic media with micro-cutting force and fine-grained tumbling media, which can further reduce the surface roughness.
  • After fine polishing, use an automatic separating machine to separate the product from the abrasive media, and then use a dryer to dry it after cleaning.

6. Final summary
  • In this case, we demonstrate the process solution of automated deburring, removing turning tool lines and polishing of a PTFE polytetrafluoroethylene sealing diaphragm product.
  • If you need professional technical support for the deburring, deflashing, removal of turning tool lines and polishing of PE polyethylene, PA polyamide, PP polypropylene, polytrifluoroethylene, polyvinylidene fluoride and plastic, rubber and other polymer material product parts or the following plastic accessories, you can refer to the above cases:
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