CN107901373A - The production technology and production control system of a kind of nylon rod bar - Google Patents
The production technology and production control system of a kind of nylon rod bar Download PDFInfo
- Publication number
- CN107901373A CN107901373A CN201710784312.XA CN201710784312A CN107901373A CN 107901373 A CN107901373 A CN 107901373A CN 201710784312 A CN201710784312 A CN 201710784312A CN 107901373 A CN107901373 A CN 107901373A
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- bar
- temperature
- nylon rod
- rod bar
- extrusion
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- 239000004677 Nylon Substances 0.000 title claims abstract 23
- 229920001778 nylon Polymers 0.000 title claims abstract 23
- 238000004519 manufacturing process Methods 0.000 title claims abstract 15
- 238000005516 engineering process Methods 0.000 title claims abstract 8
- 238000001125 extrusion Methods 0.000 claims abstract 13
- 238000010438 heat treatment Methods 0.000 claims abstract 5
- 238000000137 annealing Methods 0.000 claims abstract 3
- 239000000463 material Substances 0.000 claims abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 5
- 238000007689 inspection Methods 0.000 claims 2
- 238000010583 slow cooling Methods 0.000 claims 2
- 208000037656 Respiratory Sounds Diseases 0.000 claims 1
- 238000001035 drying Methods 0.000 claims 1
- 238000005485 electric heating Methods 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 230000008030 elimination Effects 0.000 claims 1
- 238000003379 elimination reaction Methods 0.000 claims 1
- 239000008236 heating water Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 claims 1
- 230000005622 photoelectricity Effects 0.000 claims 1
- 239000004033 plastic Substances 0.000 claims 1
- 238000002791 soaking Methods 0.000 claims 1
- 238000010792 warming Methods 0.000 claims 1
- 238000005452 bending Methods 0.000 abstract 1
Classifications
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
-
- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
- B29C2071/022—Annealing
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to the production technology and production control system of a kind of nylon rod bar, by using nylon of the viscosity more than or equal to 3.0（PA6）Virgin material section is launched into extruder, extruded after 6 stage temperature control areas of extruder, and the mistake circularity of bar extrusion is less than or equal to 0.15mm, after the present invention uses multistage temperature control to nylon chips meltingization, according to specific extruded velocity stomata is not produced when ensureing bar extrusion with extrusion diameter, then control the extruded velocity of bar consistent with hauling speed by this production control system to eliminate the centre leakiness that nylon rod bar produces in extrusion, produce stomata, white core phenomenon, finally, the present invention eliminates the molecule stress inside nylon rod bar using heat-treatment of annealing technology, improve the mechanical performance of bar（Stretching, bending strength etc.）The change in size after consumer products finish is big with solving, and product buckling deformation, drill problems of crack, lifts the quality of nylon rod bar.
Description
Technical field
The present invention relates to the production technology and production control system of a kind of nylon rod bar.
Background technology
Nylon rod bar be it is a kind of mainly by the plastic semi-finished product of extrusion molding, and can because of its moulding process relative ease
Consecutive production, excellent performance and be widely used in the industries such as machinery, chemical industry, ship, steel-making, automobile, pump valve, for making
Make gear, turbine, axle sleeve, valve spacer uniform wearability component；
But existing nylon rod bar is in process of production, due to the viscosity of material, extrusion pressure, temperature control and extrusion speed
The control of degree is improper, is easy to cause inside bar the problems such as producing stomata, white core, this drawing to product after being finished with nylon rod
Stretch, impact, the mechanical performance such as bending strength can produce serious influence, it is high to material consistency requirements especially to make some
Product is such as：Valve seat, valve rod, valve spacer etc., and the nylon rod for once making the said goods has stomata, white core to cause product
Gas leakage leakage, cause serious security incident.
The content of the invention
In view of the above-mentioned state of the art, the technical problems to be solved by the invention are that providing one kind in production can
Eliminate stomata, Bai Xin nylon rod bar production technology and production control system.
Technical solution is used by the present invention solves above-mentioned technical problem：A kind of production technology of nylon rod bar, including
Following steps：
Step 1：It is more than or equal to 3.0 nylon using viscosity（PA6）Virgin material section is launched to extruder in, by extruder
6 stage temperature control areas after extrude, the extrusion pressure of the extruder is less than in 0.5mpa-2.5mpa, the mistake circularity of bar extrusion
Equal to 0.15mm；
Step 2：Bar cools down, and is sent in water and cools down from the nylon rod bar of extruder extrusion, slowly cools to 80-100
DEG C, make to accelerate to cure inside bar, so that bar core continuously can sufficiently obtain the feed supplement on extrusion screw rod top, it is possible to reduce
The generation of bar internal porosity and Bai Xin；
Step 3；Traction, the nylon rod bar to cool down by step 2 is by drawing machine travel, the hauling speed of the dragger
It is consistent with the extruded velocity of extruder in step 1 so that at the uniform velocity smoothly to extrude；
Step 4：Cutting, after the traction of dragger, length is cut according to needed for bar；
Step 5：Heat-treatment of annealing, send the nylon rod bar that step 4 obtains into constant temperature electric heating water bath and carries out in elimination bar
The processing of portion's stress, so that nylon molecules spherocrystal re-starts arrangement, structure is more stable, removes bar in extrusion
Because of the internal stress that inside and outside cooling meat is inconsistent and the factor such as the orientation of macromolecular chain is influenced and produced,.
Preferably, 6 stage temperature control areas of the extruder include：
A. feed zone：Temperature is maintained at 240 DEG C -250 DEG C；
B. fluxing zone：Temperature control is at 260 DEG C -270 DEG C；
C. homogenizing zone：Temperature control is at 270 DEG C -280 DEG C；
D. flange section：Temperature control is at 250 DEG C -255 DEG C；
E. flat segments：Temperature is maintained at 245 DEG C -250 DEG C；
F. mould sections：Temperature control is at 235 DEG C -240 DEG C.
Preferably, 6 stage temperature control areas of extruder are heated up using electrical heating form, and 15- is kept the temperature after reaching corresponding temperature
Bar extrusion operation is carried out within 20 minutes again, and is provided with Melt Pump between the extruder and mould, so as to eliminate extrusion master
Machine discharging speed fluctuates the influence to diameter of rod, plays pressure stabilization function.
Preferably, constant temperature electric heating water bath is first slowly heated and is warming up to 100 DEG C in the step 5, after keeping the temperature a period of time
Room temperature is slow cooling to again（18℃-25℃）, made annealing treatment as reference quantity, be slowly heated with the nylon rod to a diameter of 80mm
Heating（When 4-5 is small）To after 100 DEG C, constant temperature keep the temperature 100 DEG C keep 8 it is small when, stop heating after pass through hot water or cold water alternately slowly drop
Temperature so that bar is slowly cooled to room temperature with water temperature（18℃-25℃）, the nylon rod bar diameter of other diameters often increases
10mm, when the corresponding increase by 1 of its constant temperature soaking time is small.
Preferably, the quality status such as gas that can be detected in real time inside bar is additionally provided between the step 3 and step 4
The plastic ultrasonic carrying out flaw detection instrument of hole, Bai Xin, crackle etc..
A kind of production control system of nylon rod bar, the control system include controller, temperature control module, roundness control module
Module is controlled with speed, wherein：
The temperature control module includes temperature sensor, heater, processor, which detects the temperature of each temperature control area
And be connected the feedback signal receiving terminal of data feedback to controller, the signal output part of the controller with processor, at this
Manage device and heater heating is controlled according to temperature sensor；
The speed control module includes motor driver, motor, extrusion screw rod and traction roller, wherein, the signal of the controller
Output terminal is connected with motor driver, and the current output terminal of the motor driver is connected with motor, the power output end of the motor
Be connected respectively with extrusion screw rod, traction roller, the extrusion screw rod, draw roller by the anti-of speed feedback circuit and controller
Feedback signal receiving terminal connects；
The roundness control module include laser diameter measuring instrument, extrusion pressure sensor, the data output end of the laser diameter measuring instrument with
The feedback signal receiving terminal connection of controller, the signal output part connection of the extrusion pressure sensor and controller.
Preferably, the input terminal connection of the laser diameter measuring instrument and motor driver, so that it is constant to reach extrusion pressure, rod
Material is axially and radially beated numerical stability.
Preferably, the motor driver is also equipped with power supply to provide power source.
Preferably, encoder is provided with the feedback circuit, the signal output part of the encoder and the feedback of controller
Signal receiving end connects.
Preferably, the encoder is photoelectricity incremental encoder.
Compared with prior art, the advantage of the invention is that：What the present invention cut into slices nylon (PA6) using multistage temperature control
After thawing, stomata is not produced when ensureing bar extrusion with extrusion diameter according to specific extruded velocity, then by this production
Control system controls the extruded velocity of bar consistent with hauling speed to eliminate the center that nylon rod bar produces in extrusion
Position leakiness, produces stomata, white core phenomenon, and finally, the present invention is eliminated inside nylon rod bar using heat-treatment of annealing technology
Molecule stress, improve the mechanical performance of bar（Stretching, bending strength etc.）Become with the size after consumer products finish is solved
Change big, product buckling deformation, drill problems of crack, lifts the quality of nylon rod bar, and present invention design is reasonable, and meeting market needs
Ask, be adapted to promote.
Brief description of the drawings
Fig. 1 is the system construction drawing of the present invention.
Embodiment
As shown in Figure 1, a kind of production technology of nylon rod bar, it is characterised in that comprise the following steps：
Step 1：Using the nylon for being more than or equal to 3.0 through fully dry viscosity（PA6）Virgin material section is launched into extruder, warp
Extruded after crossing 6 stage temperature control areas of extruder, the extrusion pressure of the extruder is in 0.5mpa-2.5mpa, the mistake of bar extrusion
Circularity is can be controlled in less than or equal to 0.15mm；
Step 2：Bar cools down, and is sent in water and cools down from the nylon rod bar of extruder extrusion, slowly cool to 80 DEG C-
100 DEG C, make to accelerate inside bar to cure, can be with so that bar core continuously can sufficiently obtain the feed supplement on extrusion screw rod top
Reduce bar internal porosity and the generation of Bai Xin；
Step 3；Traction, the nylon rod bar to cool down by step 2 is by drawing machine travel, the hauling speed of the dragger
It is consistent with the extruded velocity of extruder in step 1 so that at the uniform velocity smoothly to extrude；
Step 4：Cutting, after the traction of dragger, length is cut according to needed for bar；
Step 5：Heat-treatment of annealing, send the nylon rod bar that step 4 obtains into constant temperature electric heating water bath and carries out in elimination bar
The processing of portion's stress, wherein, constant temperature electric heating water bath, which is first slowly heated, in the step 5 is warming up to 100 DEG C, when keeping the temperature one section
Between after be slow cooling to room temperature again（18℃-25℃）, made annealing treatment for reference quantity, slowly with the nylon rod to a diameter of 80mm
Heat temperature raising（When 4-5 is small）To after 100 DEG C, when 100 degrees Celsius of holdings 8 of constant temperature are small, alternately delayed by hot water or cold water after stopping heating
Slow cooling so that bar is slowly cooled to room temperature with water temperature（18℃-25℃）, nylon rod bar diameter often increases 10mm, it is permanent
When the corresponding increase by 1 of warm soaking time is small, nylon macromolecule spherocrystal is set to re-start arrangement, structure is more stable, removes bar and exists
Because of the inconsistent internal stress for influencing and producing with factors such as the orientations of macromolecular chain of inside and outside cooling meat in extrusion.
Preferably, 6 stage temperature control areas of the extruder include：
A. feed zone：Temperature is maintained at 240 DEG C -250 DEG C；
B. fluxing zone：Temperature control is at 260 DEG C -270 DEG C；
C. homogenizing zone：Temperature control is at 270 DEG C -280 DEG C；
D. flange section：Temperature control is at 250 DEG C -255 DEG C；
E. flat segments：Temperature is maintained at 245 DEG C -250 DEG C；
F. mould sections：Temperature control is at 235 DEG C -240 DEG C.
More than, 6 stage temperature control areas of extruder are heated up using electrical heating form, and 15-20 is kept the temperature after reaching corresponding temperature
Minute carries out bar extrusion operation again, and is provided with Melt Pump between the extruder and mould, can eliminate extrusion main unit discharging
The influence that velocity perturbation changes diameter of rod, plays pressure stabilization function, in addition, being additionally provided between the step 3 and step 4
Bar inside quality situation can be detected in real time（Such as stomata, Bai Xin, crackle）Plastic ultrasonic carrying out flaw detection instrument.
A kind of production control system of nylon rod bar, the control system include controller, temperature control module, roundness control module
Module is controlled with speed, wherein：
The temperature control module includes temperature sensor, heater, processor, which detects the temperature of each temperature control area
And be connected the feedback signal receiving terminal of data feedback to controller, the signal output part of the controller with processor, at this
Manage device and heater heating is controlled according to temperature sensor；
The speed control module includes motor driver, motor, extrusion screw rod and traction roller, wherein, the signal of the controller
Output terminal is connected with motor driver, and the current output terminal of the motor driver is connected with motor, the power output end of the motor
Be connected respectively with extrusion screw rod, traction roller, the extrusion screw rod, draw roller by the anti-of speed feedback circuit and controller
Feedback signal receiving terminal connects, and the motor driver is also equipped with power supply to provide power source, meanwhile, set on the feedback circuit
Encoder is equipped with, the signal output part of the encoder and the feedback signal receiving terminal of controller connect, and the encoder is photoelectricity
Incremental encoder；
The roundness control module include laser diameter measuring instrument, extrusion pressure sensor, the data output end of the laser diameter measuring instrument with
The feedback signal receiving terminal connection of controller, the signal output part connection of the extrusion pressure sensor and controller, meanwhile, institute
The input terminal for stating laser diameter measuring instrument and motor driver connects, so as to reach, extrusion pressure is constant, and bar is axially and radially beated
Numerical stability.
After the present invention uses multistage temperature control to the thawing of nylon chips, according to specific extruded velocity and extrusion diameter
Ensure not produce stomata during bar extrusion, the extruded velocity and hauling speed one of bar are then controlled by this production control system
Cause, to eliminate the centre leakiness that nylon rod bar produces in extrusion, to produce stomata, white core phenomenon, finally, this hair
It is bright that molecule stress inside nylon rod bar is eliminated using heat-treatment of annealing technology, improve the mechanical performance of bar（Stretching, bending
Intensity etc.）The change in size after consumer products finish is big with solving, and product buckling deformation, drill problems of crack, lifts Buddhist nun
The property of imperial bar, present invention design is reasonable, accords with the demands of the market, and is adapted to promote.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those of skill in the art that it still can be right
Technical solution described in foregoing embodiments is modified, or which part technical characteristic is replaced on an equal basis；And this
A little modifications are replaced, and the essence of appropriate technical solution is departed from the spirit and model of various embodiments of the present invention technical solution
Enclose.
Claims (10)
1. a kind of production technology of nylon rod bar, it is characterised in that comprise the following steps：
Step 1：It is more than or equal to 3.0 nylon using abundant drying and viscosity（PA6）Virgin material section is launched into extruder, warp
Extruded after crossing 6 stage temperature control areas of extruder, extrusion pressure can be controlled in 0.5mpa-2.5mpa, the mistake circularity of bar extrusion
Less than or equal to 0.15mm；
Step 2：Bar cools down, and cools down from the nylon rod bar of extruder extrusion into water tank, slowly cools to 80-100 DEG C；
Step 3；Traction, the nylon rod bar to cool down by step 2 is by drawing machine travel, the hauling speed of the dragger
It is consistent with the extruded velocity of extruder in step 1 so that at the uniform velocity smoothly to extrude；
Step 4：Cutting, after the traction of dragger, length is cut according to needed for bar；
Step 5：Heat-treatment of annealing, send the nylon rod bar that step 4 obtains into constant temperature electric heating water bath and carries out in elimination bar
The processing of portion's stress.
A kind of 2. production technology of nylon rod bar according to claim 1, it is characterised in that 6 stages of the extruder
Temperature control area includes：
Feed zone：Temperature is maintained at 240 DEG C -250 DEG C；
Fluxing zone：Temperature control is at 260 DEG C -270 DEG C；
Homogenizing zone：Temperature control is at 270 DEG C -280 DEG C；
Flange section：Temperature control is at 250 DEG C -255 DEG C；
Flat segments：Temperature is maintained at 245 DEG C -250 DEG C；
Mould sections：Temperature control is at 235 DEG C -240 DEG C.
A kind of 3. production technology of nylon rod bar according to claim 1 or 2, it is characterised in that the 6 stages control of extruder
Warm area is heated up using electrical heating form, is reached keep the temperature 15-20 minute after corresponding temperature and carry out bar extrusion again and is operated, and this is crowded
Go out and Melt Pump is provided between machine and mould.
A kind of 4. production technology of nylon rod bar according to claim 3, it is characterised in that constant temperature electricity in the step 5
Hot water bath cabinet, which is first slowly heated, is warming up to 100 DEG C, and constant temperature is slow cooling to room temperature again after insulation a period of time（18℃-25℃）,
Made annealing treatment with the nylon rod to a diameter of 80mm as reference quantity, be slowly heated and heat up from room temperature（When 4-5 is small）To 100 DEG C
Afterwards, when 100 DEG C of holdings 8 of constant temperature are small, stop replacing slow cooling by hot water or cold water after heating so that bar is slow with water temperature
It is cooled to room temperature（18℃-25℃）, nylon rod bar diameter often increases 10mm, its constant temperature soaking time is when also accordingly increase by 1 is small.
5. the production technology of a kind of nylon rod bar according to claim 4, it is characterised in that the step 3 and step 4
Between be additionally provided with and can detect bar inside quality situation in real time（Such as stomata, Bai Xin, crackle）Plastic sonic wave inspection inspection
Survey instrument.
6. a kind of production control system of nylon rod bar, it is characterised in that the control system includes controller, temperature control module, circle
Control module and speed control module are spent, wherein：
The temperature control module includes temperature sensor, heater, processor, which detects the temperature of each temperature control area
And be connected the feedback signal receiving terminal of data feedback to controller, the signal output part of the controller with processor, at this
Manage device and heater heating is controlled according to temperature sensor；
The speed control module includes motor driver, motor, extrusion screw rod and traction roller, wherein, the signal of the controller
Output terminal is connected with motor driver, and the current output terminal of the motor driver is connected with motor, the power output end of the motor
Be connected respectively with extrusion screw rod, traction roller, the extrusion screw rod, draw roller by the anti-of speed feedback circuit and controller
Feedback signal receiving terminal connects；
The roundness control module include laser diameter measuring instrument, extrusion pressure sensor, the data output end of the laser diameter measuring instrument with
The feedback signal receiving terminal connection of controller, the signal output part connection of the extrusion pressure sensor and controller.
A kind of 7. production control system of nylon rod bar according to claim 6, it is characterised in that the laser diameter measuring instrument
It is connected with the input terminal of motor driver.
A kind of 8. production control system of nylon rod bar according to claim 6, it is characterised in that the motor driver
Power supply is also equipped with to provide power source.
9. the production control system of a kind of nylon rod bar according to claim 6, it is characterised in that on the feedback circuit
Encoder is provided with, the signal output part of the encoder and the feedback signal receiving terminal of controller connect.
10. the production control system of a kind of nylon rod bar according to claim 6, it is characterised in that the encoder is
Photoelectricity incremental encoder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710784312.XA CN107901373A (en) | 2017-09-04 | 2017-09-04 | The production technology and production control system of a kind of nylon rod bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710784312.XA CN107901373A (en) | 2017-09-04 | 2017-09-04 | The production technology and production control system of a kind of nylon rod bar |
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| CN107901373A true CN107901373A (en) | 2018-04-13 |
Family
ID=61840115
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|---|---|---|---|
| CN201710784312.XA Pending CN107901373A (en) | 2017-09-04 | 2017-09-04 | The production technology and production control system of a kind of nylon rod bar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111391266A (en) * | 2020-04-27 | 2020-07-10 | 深圳市百乐趣科技有限公司 | Pok plastic bar forming and extruding equipment |
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