CN102434612A - Polytetrafluoro ethylene (PFA) spring and manufacture method thereof - Google Patents

Abstract

The invention relates to a spring made of novel materials and a manufacture method thereof, and aims at providing a corrosion-resistant polytetrafluoro ethylene (PFA) spring and the manufacture method thereof. The PFA spring is made of PFA, and the manufacture method comprises the following procedures: 1 choosing a PFA tube with required tube diameter, and cutting the tube into sections with proper length; 2 fixing the cut PFA tube on a fixture, and cutting the tube into spiral strip shapes through a blade; 3 winding the spiral PFA strips on a sizing lead screw, placing the strips into an oven, setting the temperature to be 250 degrees and baking for 2 to 3 hours; and 4 taking the spiral PFA strips out from the oven, and placing the spiral PFA strips into pure water for cooling. Accordingly, the PFA spring is obtained.

Description

PFA spring and preparation method thereof

Technical field

The present invention relates to spring of a kind of new material and preparation method thereof.

Background technique

Spring is a kind of mechanical parts that utilize elasticity to come work.Generally process with spring steel.Motion, mitigation in order to the control parts are impacted or are shaken, store up the size of energy, measuring force etc., are widely used in machine, the instrument.The kind complicacy of spring is various, by the shape branch, mainly contains helical spring, spiral spring, leaf spring etc.

Spring uses in various occasion, and the metal spring on the market can not use in corrosive liquids.If in corrosive liquids, use metal spring, present way is plating one deck corrosion-resistant coating on spring, but coating very easily comes off, so operational safety is not high, spring has corroded but and can not in time find sometimes.

Summary of the invention

The object of the present invention is to provide a kind of PFA spring and preparation method thereof with corrosion resistance.

The technological scheme that realizes the object of the invention is:

A kind of PFA spring is characterized in that: above-mentioned spring adopts the PFA material.

The width a of above-mentioned spring is 3.5～4.5mm, and spacing b is 5～7mm.

A kind of PFA spring making method has following steps:

1) selects the PFA pipe of required caliber, and cut into suitable length;

2) pipe of the PFA after will cutting is fixed on the frock, with blade pipe is cut into strip-spiral;

3) helical PFA bar is wrapped on the typing screw mandrel, puts into baking oven, 250 ℃ of setting temperatures toasted 2～3 hours;

4) from baking oven, take out helical PFA bar, put into purified water and cool off, obtain the PFA spring.

Above-mentioned steps 3) the typing screw mandrel is that metal is processed in, and the spacing of its groove is the spacing of made spring.

Benefit of the present invention is that the PFA material has corrosion resistance, so when the spring of being processed by PFA pipe uses, also have good anti-corrosion in corrosive liquids, can guarantee that spring plays a role normally.

Description of drawings

Fig. 1 is the perspective view of PFA spring of the present invention.

Embodiment

See Fig. 1, PFA spring of the present invention adopts the PFA material.The width a of above-mentioned PFA spring is 3.5～4.5mm, and spacing b is 5～7mm.

Above-mentioned PFA spring making method has following steps:

1) selects the PFA pipe of required caliber, and cut into suitable length;

2) pipe of the PFA after will cutting is fixed on the frock, with blade pipe is cut into strip-spiral;

3) helical PFA bar is wrapped on the typing screw mandrel, puts into baking oven, 250 ℃ of setting temperatures toasted 2～3 hours;

4) from baking oven, take out helical PFA bar, put into purified water and cool off, obtain the PFA spring.

Above-mentioned steps 3) the typing screw mandrel is that metal is processed in, and the spacing of its groove is the spacing of made spring.Be that the groove that helical PFA bar is screwed in the metal screw mandrel was located after the PFA pipe was accomplished the helical cutting, through the baking oven heating for fixing shape, helical PFA bar will form required spring shape, and its spacing is consistent with typing screw mandrel flute pitch.The PFA spring that forms through heating, cooling can be applied in the corrosive liquids.

Obviously, above-mentioned embodiment of the present invention only be for clearly the present invention is described and is done for example, and be not to be qualification to embodiment of the present invention.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also be easy to make other pro forma variation or substitute, and these change or substitute and also will be included within the protection domain that the present invention confirms.

Claims (4)

1. a PFA spring is characterized in that: above-mentioned spring employing PFA material.

2. PFA spring according to claim 1 is characterized in that: the width a of above-mentioned spring is 3.5～4.5mm, and spacing b is 5～7mm.

3. PFA spring making method has following steps:

1) selects the PFA pipe of required caliber, and cut into suitable length;

2) pipe of the PFA after will cutting is fixed on the frock, with blade pipe is cut into strip-spiral;

3) helical PFA bar is wrapped on the typing screw mandrel, puts into baking oven, 250 ℃ of setting temperatures toasted 2～3 hours;

4) from baking oven, take out helical PFA bar, put into purified water and cool off, obtain the PFA spring.

4. PFA spring making method according to claim 3 is characterized in that: the typing screw mandrel is that metal is processed above-mentioned steps 3), and the spacing of its groove is the spacing of made spring.

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