CN104589562B - Polytetrafluoroethylene thick product automatic molding method and device - Google Patents
Polytetrafluoroethylene thick product automatic molding method and device Download PDFInfo
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- CN104589562B CN104589562B CN201410698398.0A CN201410698398A CN104589562B CN 104589562 B CN104589562 B CN 104589562B CN 201410698398 A CN201410698398 A CN 201410698398A CN 104589562 B CN104589562 B CN 104589562B
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- molding pressure
- politef
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- thick product
- molding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/34—Feeding the material to the mould or the compression means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
The invention discloses a polytetrafluoroethylene thick product automatic molding method, and is characterized in that the method comprises the following steps: 1) arranging a pressing mechanism providing pressure; arranging a polytetrafluoroethylene thick product molding mechanism; arranging a displacement sensing device for detection of a stroke of the pressing mechanism; and arranging a control device for coordinating a pressing process, wherein the control device is electrically connected with the pressing mechanism, the molding mechanism and the displacement sensing device; 2) material packing: adding a premixed polytetrafluoroethylene mixture into a molding mold; and 3) pressing molding: according to information feedback of a pressure device and the displacement sensing device, controlling the pressing mechanism to perform multi-segment pressing molding on the polytetrafluoroethylene mixture in the molding mechanism through the control device. The invention also discloses a polytetrafluoroethylene thick product automatic molding device for implementing the method. With adopting of conditional automatic multi-segment pressing, air in the molding mold can be fully discharged, a blank material is pressed densely and uniformly, and the product quality is more stable.
Description
Technical field
The present invention relates to politef thick product forming technique is and in particular to politef thick product automatic moulding side
Method and its equipment.
Background technology
Existing politef guide-soft-band and guidance tape are all to adopt rotary cutting method to process with politef thick stock material
Form, politef thick stock material can use after being re-sintered using cold moudling.Cold moudling process like powder is metallurgical, will
The politef compound mixing adds in mould, compressing.Because blank is big, insert and expect many, pressing process requirement
High, whether the uniformity of blank and aerofluxuss are improved directly influences blank quality.The serious blank that even can cause ftractures,
Blank is led to be scrapped.
At present, existing politef (PTFE) thick product forming machine, the hydraulic press using traditional structure provides into
Press power needed for type, hydraulic press from gear pump, reversal valve, overflow valve, to realize plus ball bearing made piston rod up and down toward
Multiple, the press power needed for politef (PTFE) product cold moudling is provided, because equipment composition original paper function is simple, controls
System is single, and PTFE article forming process needs manually to run button and control piston rod stroke by controlling overflow valve and equipment
And pressure it is ensured that in pressing process PTFE compound by loose in compacting process, expect uniform compaction, and expect in the middle of do not choke with resentment
Phenomenon is it is ensured that later stage high temperature sintering is not in Stress non-homogeneity and cracking phenomena of choking with resentment.This production method, politef
Thick product compressing mainly by manually-operated, regulation relief valve, to control hydraulic press plunger decrease speed and distance, reaches
Suppress to slow, the effect of fixed point aerofluxuss.But operation is more complicated, human users are random big, operational approach disunity, and
Mobility of people is big, increases the difficulty of staff training.So manually random compacting, relies on personal operating experience, leads to
The poor quality opposite sex is very big, and defect rate is also high.Because the operational approach of operator is random big, in order to time saving and energy saving, adopt
The irregular disposal pressed moulding of speed speed, leads to product produced problem more.
Some automatic hydraulic presses on the market, add displacement transducer to control with variable pump plus servo valve, thus substituting artificial
Operation, but it is high to environmental requirement, and the tetrafluoro scene of colding pressing often powder more it is difficult to meet the requirement of servo valve, be difficult to protect
Barrier servo valve steady operation, and the equipment cost cost being configured so that is high, function utilization rate is low, does not meet the performance of enterprises.More
Importantly, current hydraulic press is although be automatization, but its drawing method or traditional disposable compacting, due to pressure
The imperfection of method processed, improving productivity, but production quality still cannot be lifted.
Therefore, it is necessary to develop a kind of politef thick product automatic molding process method producing high-quality, and
The automatic producing device of the automation mechanized operation of the method can be implemented, thus solving existing forming method imperfection, equipment falls behind, people
Product bad phenomenon and the low problem of productivity ratio that the reasons such as work complex operation, human users' method disunity cause.
Content of the invention
The present invention be directed to deficiency of the prior art, and provide a kind of politef thick product automatic forming method and
Implement the shaping equipment of the method.
For achieving the above object, the technical solution used in the present invention is：
A kind of politef thick product automatic forming method is it is characterised in that it comprises the steps：
1) briquetting machine of setting one offer pressure, this briquetting machine includes pressure apparatus and flexible pressing rod；Setting one
Politef thick product shaping mechanism, this shaping mechanism includes mould, molding pressure cylinder and molding pressure ring, described molding pressure
Cylinder is connected with flexible pressing rod, and described molding pressure ring is located at the upper and lower both sides of die cavity of mould, wherein the molding pressure of upside
Ring is connected with molding pressure cylinder；The displacement sensing apparatus of setting one detection briquetting machine stroke, this displacement sensing apparatus includes position
Displacement sensor, this displacement transducer is corresponding with flexible pressing rod；The control device of setting one coordination pressing process, this control fills
Put and electrically connect with briquetting machine, shaping mechanism and displacement sensing apparatus；Wherein, described briquetting machine is hydraulic press, described flexible
Pressing rod is the cylinder piston rod of hydraulic press, and described pressure apparatus is direct-acting type proportional overflow valve；Described displacement sensing apparatus bag
Include displacement transducer and grating scale assembly；Be provided with formation die core in described mould, this formation die core with located at mould
The molding pressure ring of downside is connected, and is upward through the molding pressure ring on the upside of mould, stretches in molding pressure cylinder；
2) filler：The politef being pre-mixed compound is added in mould；
3) compressing：According to the feedback of the information of pressure apparatus and displacement sensing apparatus, compacting is controlled by control device
It is compressing that mechanism carries out multistage to the politef compound in shaping mechanism；It comprises the steps：
3.1) first paragraph is compressing：Flexible pressing rod drives molding pressure cylinder to push, and then drives on the upside of mould
Molding pressure ring pushes, after pressing to setup pressure value or shift value, the time value setting of pausing；
3.2) second segment is compressing：Flexible pressing rod drives molding pressure cylinder to continue to push, and then drives on mould
The molding pressure ring of side continues to push, after pressing to setup pressure value or shift value, the time value setting of pausing；
3.3) repeat 3.1) or 3.2) in step, carry out next section compressing；Carrying out more than two sections be pressed into
After type, fully the air in mould is discharged, stock is suppressed packed uniform, form politef thick product.
Further, step 3) in：Described pressure mechanism is carried out according to the pre-set multistage pressing step of control device
Compressing；Wherein, first the compressing segmentation of multistage is carried out according to the shift value pushing, after being depressed into setting position,
Carry out the compressing segmentation of multistage further according to the pressure value pushing.
Further, step 3) in：Described flexible pressing rod drives molding pressure cylinder to push, and displacement transducer starts to check and anti-
Present the displacement information pushing；Push 15-25mm, stop the 5-15 second, it is compressing to complete first paragraph, then push 15-25mm and stop 5-15
Second, it is compressing to complete present segment, so proceeds ensuing segmentation compressing；Until after being depressed into setting position,
Pressure apparatus is started working, and checks and feed back the pressure information pushing；When pressure value reaches 1MPa, stop the 5-15 second, complete current
Section is compressing, and when being further continued for pressing down, pressure value often increases 1MPa, stops the 5-15 second, completes present segment compressing；Until filling
Divide ground that the air in mould is discharged, stock is suppressed packed uniform, form politef thick product.
A kind of politef thick product shaping equipment implementing methods described is it is characterised in that include an offer
The briquetting machine of pressure, this briquetting machine includes pressure apparatus and flexible pressing rod；One politef thick product shaping mechanism,
This shaping mechanism includes mould, molding pressure cylinder and molding pressure ring, and described molding pressure cylinder is connected with flexible pressing rod, described
Molding pressure ring is connected with molding pressure cylinder located at the upper and lower both sides of mould, the molding pressure ring of wherein upside；One detection press
The displacement sensing apparatus of structure stroke, this displacement sensing apparatus includes displacement transducer, this displacement transducer and flexible pressing rod phase
Corresponding；The control device of one coordination pressing process, this control device is electrically connected with briquetting machine, shaping mechanism and displacement sensing apparatus
Connect.
Further, described briquetting machine is hydraulic press, and described flexible pressing rod is the cylinder piston rod of hydraulic press, described pressure
Power apparatus are direct-acting type proportional overflow valve.
Further, described displacement sensing apparatus include displacement transducer and grating scale assembly.
Further, it is provided with formation die core in described mould, this formation die core and molding on the downside of mould
Pressure ring is connected, and is upward through the molding pressure ring on the upside of mould, stretches in molding pressure cylinder.
It is an advantage of the current invention that：Politef (PTFE) the thick product automatic forming method of the present invention and equipment, lead to
Cross control device and adopt PLC automatic control system, thus instead of the artificial operation of complexity with programming automatic control technology；In pressure
During system, using pre-conditioned automatization's multistage compacting, control shift value, pressure value and the time value of compacting, divide many
Duan Jinhang suppresses, and fully the air in mould can be discharged, stock be suppressed packed uniform, makes product quality high-quality
And it is stable.
This method and equipment operation simply do not need special training, significantly reduce the training difficulty of producers；By
In cooperating of control device, hydraulic press, direct-acting type proportional overflow valve and displacement transducer, totally enclosed immediately anti-from realizing
Feedback, is completely solved so that each of production process step all executes step by step according to the program that PLC sets with control
Human users are random big, and the skimble-scamble problem of operational approach also solves the therefore product quality leading to, low production efficiency
The problems such as, reach the requirement of Improving The Quality of Products and production efficiency.
Below in conjunction with the accompanying drawings with specific embodiment, the present invention is described in more detail.
Brief description
Fig. 1 is the structural representation of politef thick product shaping equipment；
In figure：Mould 1；Molding pressure cylinder 2；Molding pressure ring 3；Displacement transducer 4；Hydraulic press 5；Cylinder piston rod 6；Become
Pattern core 7；Politef compound 8.
Specific embodiment
A kind of politef thick product automatic forming method that the present embodiment provides, it comprises the steps：
1) briquetting machine of setting one offer pressure, this briquetting machine includes pressure apparatus and flexible pressing rod；Setting one
Politef thick product shaping mechanism, this shaping mechanism includes mould 1, molding pressure cylinder 2 and molding pressure ring 3, described one-tenth
Type pressure cylinder 2 is connected with flexible pressing rod, described molding pressure ring 3 located at the upper and lower both sides of die cavity of mould 1, wherein upside
Molding pressure ring 3 is connected with molding pressure cylinder 2；The displacement sensing apparatus of setting one detection briquetting machine stroke, this displacement sensing fills
Put including displacement transducer 4, this displacement transducer 4 is corresponding with flexible pressing rod；The control dress of setting one coordination pressing process
Put, this control device is electrically connected with briquetting machine, shaping mechanism and displacement sensing apparatus；Wherein, described briquetting machine is hydraulic pressure
Machine 5, described flexible pressing rod is the cylinder piston rod 6 of hydraulic press, and described pressure apparatus is direct-acting type proportional overflow valve；Institute's rheme
Move sensing device and include displacement transducer 4 and grating scale assembly；It is provided with formation die core 7, this formation die core in described mould 1
7 are connected with the molding pressure ring 3 on the downside of mould, and are upward through the molding pressure ring 3 on the upside of mould, stretch
Enter to molding pressure cylinder 2；
2) filler：The politef being pre-mixed compound 8 is added in mould 1；
3) compressing：According to the feedback of the information of pressure apparatus and displacement sensing apparatus, compacting is controlled by control device
It is compressing that mechanism carries out multistage to the politef compound 8 in shaping mechanism；It comprises the steps：
3.1) first paragraph is compressing：Flexible pressing rod drives molding pressure cylinder to push, and then drives on the upside of mould
Molding pressure ring pushes, after pressing to setup pressure value or shift value, the time value setting of pausing；
3.2) second segment is compressing：Flexible pressing rod drives molding pressure cylinder to continue to push, and then drives on mould
The molding pressure ring of side continues to push, after pressing to setup pressure value or shift value, the time value setting of pausing；
3.3) repeat 3.1) or 3.2) in step, carry out next section compressing；Carrying out more than two sections be pressed into
After type, fully the air in mould is discharged, stock is suppressed packed uniform, form politef thick product.
Specifically, step 3) in：Described pressure mechanism is carried out according to the pre-set multistage pressing step of control device
Compressing；Wherein, first the compressing segmentation of multistage is carried out according to the shift value pushing, after being depressed into setting position,
Carry out the compressing segmentation of multistage further according to the pressure value pushing.
More specifically, step 3) in：Described flexible pressing rod drives molding pressure cylinder to push, and displacement transducer starts to check simultaneously
Feed back the displacement information pushing；Push 15-25mm, stop the 5-15 second, it is compressing to complete first paragraph, then push 15-25mm and stop 5-
15 seconds, it was compressing to complete present segment, so proceeds ensuing segmentation compressing；Until being depressed into setting position
Afterwards, pressure apparatus is started working, and checks and feed back the pressure information pushing；When pressure value reaches 1MPa, stop the 5-15 second, complete to work as
Leading portion is compressing, and when being further continued for pressing down, pressure value often increases 1MPa, stops the 5-15 second, completes present segment compressing；Until
Fully the air in mould is discharged, stock is suppressed packed uniform, form politef thick product.
A kind of politef thick product shaping equipment implementing methods described, including the press of an offer pressure
Structure, this briquetting machine includes pressure apparatus and flexible pressing rod；One politef thick product shaping mechanism, this shaping mechanism bag
Include mould 1, molding pressure cylinder 2 and molding pressure ring 3, described molding pressure cylinder 2 is connected with flexible pressing rod, described molding pressure ring
3 are connected with molding pressure cylinder 2 located at the upper and lower both sides of mould, the molding pressure ring 3 of wherein upside；One detection briquetting machine stroke
Displacement sensing apparatus, this displacement sensing apparatus includes displacement transducer 4, and this displacement transducer 4 is corresponding with flexible pressing rod；
The control device of one coordination pressing process, this control device is electrically connected with briquetting machine, shaping mechanism and displacement sensing apparatus.
Wherein, described briquetting machine is hydraulic press 5, and described flexible pressing rod is the cylinder piston rod 6 of hydraulic press 5, described
Pressure apparatus is direct-acting type proportional overflow valve.Described displacement sensing apparatus include displacement transducer 4 and grating scale assembly.Described one-tenth
It is provided with formation die core 7, this formation die core 7 is connected with the molding pressure ring 3 located at mould 1 downside in pattern tool 1, and upwards
Pass through the molding pressure ring 3 located at mould 1 upside, stretch in molding pressure cylinder 2.
Generally speaking, when the start key of equipment of pressing, hydraulic press cylinder starts to push, and at this moment displacement transducer starts to check
The stroke of oil cylinder movement by feedback of the information to PLC system, then PLC system is controlled according to the program being previously set
(such as：Oil cylinder movement 20mm stops 10 seconds, then moves 25mm and stop 10 seconds, can arrange multi-section stroke by that analogy).When oil cylinder movement arrives
During setting position, direct-acting type proportional overflow valve is started working, now PLC system according to setting program to direct-acting type proportional overflow valve
It is controlled (such as：Pressure reaches 1MPa oil cylinder and stops compacting 10 seconds, and pressure reaches 2MPa oil cylinder and stops compacting 10 seconds, with this again
Analogize and multistage pressure rating can be set be controlled).The multistage of stroke controls and the multistage of pressure controls, and forms the many of automatization
Section is compressing, so that product can fully the air in mould be discharged in pressing process, suppresses packed uniform, make product
Quality is more stable.
The present invention is not limited to above-mentioned embodiment, adopts or approximation method or structure identical with the above embodiment of the present invention
Make, obtained from other politef thick product automatic forming methods and equipment, all within protection scope of the present invention.
Claims (10)
1. a kind of politef thick product automatic forming method is it is characterised in that it comprises the steps：
1) briquetting machine of setting one offer pressure, this briquetting machine includes pressure apparatus and flexible pressing rod；Arrange one poly- four
Fluorothene thick product shaping mechanism, this shaping mechanism includes mould, molding pressure cylinder and molding pressure ring, described molding pressure cylinder with
Flexible pressing rod is connected, described molding pressure ring located at the upper and lower both sides of die cavity of mould, wherein the molding pressure ring of upside with
Molding pressure cylinder is connected；The displacement sensing apparatus of setting one detection briquetting machine stroke, this displacement sensing apparatus includes displacement and passes
Sensor, this displacement transducer is corresponding with flexible pressing rod；Setting one coordination pressing process control device, this control device with
Briquetting machine, shaping mechanism and displacement sensing apparatus electrical connection；
2) filler：The politef being pre-mixed compound is added in mould；
3) compressing：According to the feedback of the information of pressure apparatus and displacement sensing apparatus, briquetting machine is controlled by control device
Multistage is carried out to the politef compound in shaping mechanism compressing；It comprises the steps：
3.1) first paragraph is compressing：Flexible pressing rod drives molding pressure cylinder to push, and then drives the molding on the upside of mould
Pressure ring pushes, after pressing to setup pressure value or shift value, the time value setting of pausing；
3.2) second segment is compressing：Flexible pressing rod drives molding pressure cylinder to continue to push, and then drives on the upside of mould
Molding pressure ring continues to push, after pressing to setup pressure value or shift value, the time value setting of pausing；
3.3) repeat 3.1) or 3.2) in step, carry out next section compressing；After carrying out more than two sections compressing,
Fully the air in mould is discharged, stock is suppressed packed uniform, form politef thick product.
2. politef thick product automatic forming method according to claim 1 is it is characterised in that step 3) in：Institute
State pressure mechanism to be pressed according to the pre-set multistage pressing step of control device；Wherein, basis pushes first
Shift value carry out the compressing segmentation of multistage, after being depressed into setting position, carry out multistage further according to the pressure value pushing
Compressing segmentation.
3. politef thick product automatic forming method according to claim 2 is it is characterised in that step 3) in：Institute
Stating flexible pressing rod drives molding pressure cylinder to push, and displacement transducer starts to check and feed back the displacement information pushing；Push 15-
25mm, stops the 5-15 second, and it is compressing to complete first paragraph, then pushes 15-25mm and stop the 5-15 second, completes present segment compressing, such as
It is compressing that this proceeds ensuing segmentation；Until after being depressed into setting position, pressure apparatus is started working, check and anti-
Present the pressure information pushing；When pressure value reaches 1MPa, stop the 5-15 second, it is compressing to complete present segment, when being further continued for pressing down,
Pressure value often increases 1MPa, stops the 5-15 second, completes present segment compressing；Until fully the air in mould is arranged
Go out, stock is suppressed packed uniform, form politef thick product.
4. politef thick product automatic forming method according to claim 1 is it is characterised in that described briquetting machine
For hydraulic press, described flexible pressing rod is the cylinder piston rod of hydraulic press, and described pressure apparatus is direct-acting type proportional overflow valve.
5. politef thick product automatic forming method according to claim 1 is it is characterised in that described displacement sensing
Device includes displacement transducer and grating scale assembly.
6. politef thick product automatic forming method according to claim 1 is it is characterised in that described mould
In be provided with formation die core, this formation die core is connected with the molding pressure ring on the downside of mould, and is upward through located at one-tenth
The molding pressure ring of pattern tool upside, stretches in molding pressure cylinder.
7. a kind of politef thick product shaping equipment implementing one of claim 1 to 6 methods described, its feature exists
In including the briquetting machine of an offer pressure, this briquetting machine includes pressure apparatus and flexible pressing rod；One politef is thick
Product molding mechanism, this shaping mechanism includes mould, molding pressure cylinder and molding pressure ring, described molding pressure cylinder and flexible compacting
Bar is connected, and described molding pressure ring is connected with molding pressure cylinder located at the upper and lower both sides of mould, the molding pressure ring of wherein upside；
The displacement sensing apparatus of one detection briquetting machine stroke, this displacement sensing apparatus includes displacement transducer, this displacement transducer with
Flexible pressing rod is corresponding；The control device of one coordination pressing process, this control device and briquetting machine, shaping mechanism and displacement
Sensing device electrically connects.
8. politef thick product shaping equipment according to claim 7 is it is characterised in that described briquetting machine
For hydraulic press, described flexible pressing rod is the cylinder piston rod of hydraulic press, and described pressure apparatus is direct-acting type proportional overflow valve.
9. politef thick product shaping equipment according to claim 7 is it is characterised in that described displacement sensing
Device includes displacement transducer and grating scale assembly.
10. politef thick product shaping equipment according to claim 7 is it is characterised in that described shaping mould
Be provided with formation die core in tool, this formation die core is connected with the molding pressure ring on the downside of mould, and be upward through located at
Molding pressure ring on the upside of mould, stretches in molding pressure cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698398.0A CN104589562B (en) | 2014-11-26 | 2014-11-26 | Polytetrafluoroethylene thick product automatic molding method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410698398.0A CN104589562B (en) | 2014-11-26 | 2014-11-26 | Polytetrafluoroethylene thick product automatic molding method and device |
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| CN104589562A CN104589562A (en) | 2015-05-06 |
| CN104589562B true CN104589562B (en) | 2017-02-22 |
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| CN106969699A (en) * | 2017-05-16 | 2017-07-21 | 哈尔滨理工大学 | A kind of high-precision fixed thick instrument of thin polymer film |
| CN107253306B (en) * | 2017-06-28 | 2023-05-26 | 南通海利特橡塑机械有限公司 | Tetrafluoro gasket mould pressing device |
| CN109016304A (en) * | 2018-09-25 | 2018-12-18 | 贵州祥宇泵阀制造有限公司 | A kind of process of tetrafluoro molding production |
| CN109571717B (en) * | 2018-12-12 | 2020-11-03 | 厦门理工学院 | Accurate pressing control method for ceramic brick press |
| CN113957550B (en) * | 2021-09-09 | 2023-03-10 | 苏州耐德新材料科技有限公司 | Stroke sectional type hydraulic plunger wire extruding method |
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| JP3267073B2 (en) * | 1994-11-01 | 2002-03-18 | 松下電器産業株式会社 | Method of molding optical element and molded optical element |
| CN100575040C (en) * | 2006-03-17 | 2009-12-30 | 浙江机电职业技术学院 | A kind of processing unit (plant) of polytetrafluoroethylproducts products |
| CN102199330B (en) * | 2010-12-24 | 2015-01-07 | 广东新志密封技术有限公司 | Method for preparing modified Teflon composite material and its product |
| JP5153023B1 (en) * | 2012-04-13 | 2013-02-27 | 株式会社名機製作所 | Compression molding method of resin molded product containing fiber |
| CN203579982U (en) * | 2013-09-23 | 2014-05-07 | 富顺县众城氟塑料厂 | T-shaped polytetrafluoroethylene tube forming mold |
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