CN110370489A - A kind of production line of polrvinyl chloride product - Google Patents
A kind of production line of polrvinyl chloride product Download PDFInfo
- Publication number
- CN110370489A CN110370489A CN201910671452.5A CN201910671452A CN110370489A CN 110370489 A CN110370489 A CN 110370489A CN 201910671452 A CN201910671452 A CN 201910671452A CN 110370489 A CN110370489 A CN 110370489A
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- CN
- China
- Prior art keywords
- hopper
- conveying device
- screw extruder
- double screw
- extrusion
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
-
- 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
- B29C31/00—Handling, e.g. feeding of the material to be shaped, storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots
- B29C31/02—Dispensing from vessels, e.g. hoppers
-
- 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
-
- 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
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a kind of production lines of polrvinyl chloride product, this assembly line is provided with high-speed mixer, cooling mixing machine, first double screw extruder, extrusion device, pelleter and the second double screw extruder, the first hopper and the first conveying device are provided between high-speed mixer and cooling mixing machine, the second hopper and the second conveying device are provided between cooling mixing machine and the first double screw extruder, third conveying device is provided between extrusion device and pelleter, third hopper and the 4th conveying device are provided between pelleter and the second double screw extruder, coherent assembly line through the invention, production process carries out batch turning without artificial, it is time saving and energy saving, cost of labor substantially reduces, efficiency greatly improves, although being coherent production on this assembly line, but without carrying out Hard link between capital equipment, once there is equipment damage It is bad, it can be replaced at any time, will not influence production process.
Description
Technical field
The present invention relates to polrvinyl chloride product production line technical field, specially a kind of production of polrvinyl chloride product
Assembly line.
Background technique
Assembly line, a kind of industrial production method refer to that each production unit is only absorbed in the work for handling some segment
Make.
Traditional each equipment of polrvinyl chloride product production line is separately provided, and batch turning needs are manually completed, greatly
Cost of labor is increased greatly, and production efficiency is lower, it would therefore be highly desirable to which a kind of improved technology is come in the presence of solving the prior art
This problem.
Summary of the invention
The purpose of the present invention is to provide a kind of production line of polrvinyl chloride product, production process is carried out without artificial
Batch turning, time saving and energy saving, cost of labor substantially reduces, and efficiency greatly improves, to solve the problems mentioned in the above background technology.
To achieve the above object, the invention provides the following technical scheme: a kind of production line of polrvinyl chloride product, packet
Include high-speed mixer, the first hopper, the first conveying device, cooling mixing machine, the second hopper, the second conveying device, first pair of spiral shell
Bar extruder, extrusion device, third conveying device, pelleter, third hopper, the 4th conveying device, the second double screw extruder
And extrusion die head, discharge port one end of the high-speed mixer are provided with the first hopper, first conveying device one end is set
It sets in the first hopper, the first conveying device other end is set to the feed inlet upper end of cooling mixing machine, and the cooling is mixed
Discharge port one end of conjunction machine is provided with the second hopper, and second conveying device one end is arranged in the second hopper, and described second
The conveying device other end is set to the feed inlet upper end of the first double screw extruder, and first double screw extruder is far from second
Conveying device one end is connected with extrusion device, and third conveying device one end is set under the discharge port of extrusion device bottom end
End, the third conveying device other end are set to the feed inlet upper end of pelleter, and the discharge outlet of the pelleter is provided with
Third hopper, described 4th conveying device one end are arranged in third hopper, and the 4th conveying device other end is set to the
The feed inlet upper end of two double screw extruders, second double screw extruder are equipped with extrusion far from the 4th conveying device one end
Mould head.
Preferably, motor is provided on the outside of first hopper, the second hopper, third hopper and third conveying device to subtract
Fast machine assembly, first hopper, the second hopper and third hopper two sides are provided with active axis hole, first hopper,
Both ends are provided with slope, the gradient and the first conveying device of the first hopper interior ramp inside two hoppers and third hopper
Setting angle is corresponding, and the gradient of the second hopper interior ramp is corresponding with the second conveying device setting angle, and described
The gradient of three hopper interior ramps is corresponding with the 4th conveying device setting angle.
Preferably, first hopper and the second hopper upper surface are provided with material receiving port, and the third hopper is closely from cutting
Grain machine one end is provided with opening.
Preferably, the structure of first conveying device, the second conveying device, third conveying device and the 4th conveying device
Unanimously, first conveying device, the second conveying device, third conveying device and the 4th conveying device by side plate, bracket, from
Dynamic roller, drive roll and conveyer belt are constituted, and the bracket is connected with side plate, and several driven vollers are provided between the side plate, described
Drive roll is provided between side plate bottom, the conveyer belt is wrapped on the outside of driven voller and drive roll, is arranged on the conveyer belt
There are several antiskid raised strips, the drive roll both ends difference of first conveying device, the second conveying device and the 4th conveying device
It is set in the active axis hole of the first hopper, the second hopper and third hopper two sides and drive roll one end passes through transmission belt and motor
Speed reducer assembly is connected, and the driving shaft and motor reducer assembly of the third conveying device are direct-connected.
Preferably, the cooling mixing machine upper end is provided with receiving hopper.
Preferably, the extrusion device include extrusion device main body, connecting flange, vacuum pump, support leg and discharging curved mouth,
The extrusion device body side is provided with connecting flange, and the extrusion device body upper surface is provided with vacuum pump, described to squeeze
Apparatus main body lower surface is provided with several support legs out, and it is curved that extrusion device body lower surface middle position is provided with discharging
Mouthful.
Preferably, application method the following steps are included:
Step 1: putting the raw materials into high-speed mixer, after being mixed by high-speed mixer in discharging to the first hopper；
Step 2: the material in the first hopper is delivered to above cooling mixing machine by the first conveying device, and is mixed from cooling
The receiving hopper of machine upper end is sent into cooling mixing machine, after cooling mixing, is exited into the second hopper；
Material in second hopper: being delivered in the first double screw extruder by step 3 by the second conveying device, by heating
It is pressed into extrusion device, is squeezed out material from the discharging curved mouth of lower end by vacuum pump and falls in third conveying device,
Expect at this time in a strip shape；
Step 4: being sent material in a strip shape to pelleter by third conveying device, be cut into transparent grain by pelleter, and
It is sent into third hopper；
Step 5: the particle in third hopper is delivered in the second double screw extruder by the 4th conveying device, by adding
Heat pressurizes and by extrusion die head, finally squeezes out polrvinyl chloride product.
Compared with prior art, the beneficial effects of the present invention are:
(1) assembly line to link up through the invention, production process carry out batch turning without artificial, and time saving and energy saving, cost of labor is significantly
It reduces, efficiency greatly improves.
(2) although being coherent production on this assembly line, without carrying out Hard link between capital equipment, once there is equipment
Damage, can be replaced at any time, will not influence production process.
Detailed description of the invention
Fig. 1 is connection relationship diagram of the present invention.
Fig. 2 is the first conveying device structural schematic diagram.
Fig. 3 is extrusion device structural schematic diagram.
In figure: high-speed mixer 1, the first hopper 2, the first conveying device 3, cooling mixing machine 4, the second hopper 5, second are defeated
Send device 6, the first double screw extruder 7, extrusion device 8, third conveying device 9, pelleter 10, third hopper the 11, the 4th defeated
Send device 12, the second double screw extruder 13, extrusion die head 14, motor reducer assembly 15, material receiving port 16, side plate 17, branch
Frame 18, driven voller 19, drive roll 20, conveyer belt 21, receiving hopper 22, extrusion device main body 81, connecting flange 82, vacuum pump 83,
Support leg 84, discharging curved mouth 85.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, the present invention provides a kind of technical solution: a kind of production line of polrvinyl chloride product, including height
Fast mixing machine 1, the first hopper 2, the first conveying device 3, cooling mixing machine 4, the second hopper 5, the second conveying device 6, first pairs
Screw extruder 7, extrusion device 8, third conveying device 9, pelleter 10, third hopper 11, the 4th conveying device 12, second pairs
Screw extruder 13 and extrusion die head 14, discharge port one end of high-speed mixer 1 are provided with the first hopper 2, the first conveying dress
It sets 3 one end to be arranged in the first hopper 2,4 upper end of cooling mixing machine is provided with receiving hopper 22, and 3 other end of the first conveying device is set
It is placed in 22 upper end of receiving hopper of cooling mixing machine 4, discharge port one end of cooling mixing machine 4 is provided with the second hopper 5, the second conveying
6 one end of device is arranged in the second hopper 5, and 6 other end of the second conveying device is set to the feed inlet of the first double screw extruder 7
Upper end, the first double screw extruder 7 are connected far from 6 one end of the second conveying device with extrusion device 8,9 one end of third conveying device
It is set to the discharge port lower end of 8 bottom end of extrusion device, 9 other end of third conveying device is set on the feed inlet of pelleter 10
End, the discharge outlet of pelleter 10 are provided with third hopper 11, and 12 one end of the 4th conveying device is arranged in third hopper 11, the
Four conveying devices, 12 other end is set to the feed inlet upper end of the second double screw extruder 13, and the second double screw extruder 13 is separate
4th conveying device, 12 one end is equipped with extrusion die head 14.
It is total that motor reducer is provided on the outside of first hopper 2, the second hopper 5, third hopper 11 and third conveying device 9
Active axis hole, the first hopper 2, the second hopper 5 are provided at 15, first hoppers 2, the second hopper 5 and 11 two sides of third hopper
And 11 inside both ends of third hopper are provided with slope, the gradient and 3 established angle of the first conveying device of 2 interior ramp of the first hopper
Spend corresponding, the gradient of 5 interior ramp of the second hopper is corresponding with 6 setting angle of the second conveying device, inside third hopper 11
The gradient on slope is corresponding with 12 setting angle of the 4th conveying device, and the first hopper 2 and 5 upper surface of the second hopper are provided with and connect
Material mouth 16, third hopper 11 are closely provided with opening from 10 one end of pelleter.
As shown in Fig. 2, the first conveying device 3, the second conveying device 6, third conveying device 9 and the 4th conveying device 12
Structure is consistent, the first conveying device 3, the second conveying device 6, third conveying device 9 and the 4th conveying device 12 by side plate 17,
Bracket 18, driven voller 19, drive roll 20 and conveyer belt 21 are constituted, and bracket 18 is connected with side plate 17, if being provided between side plate 17
Dry driven voller 19 is provided with drive roll 20 between 17 bottom of side plate, and conveyer belt 21 is wrapped in 20 outside of driven voller 19 and drive roll,
It is provided with several antiskid raised strips on conveyer belt 21, the first conveying device 3, the second conveying device 6 and the 4th conveying device 12
20 both ends of drive roll are respectively arranged in the active axis hole of 11 two sides of the first hopper 2, the second hopper 5 and third hopper and drive roll
20 one end are connected by transmission belt with motor reducer assembly 15, the driving shaft and motor reducer assembly of third conveying device 9
15 is direct-connected.
As shown in figure 3, extrusion device 8 include extrusion device main body 81, connecting flange 82, vacuum pump 83, support leg 84 and
Discharge curved mouth 85, and 81 side of extrusion device main body is provided with connecting flange 82, and 81 upper surface of extrusion device main body is provided with vacuum
Pump 83,81 lower surface of extrusion device main body are provided with several support legs 84, the setting of 81 lower surface middle position of extrusion device main body
There is discharging curved mouth 85.
A kind of production line of polrvinyl chloride product, application method the following steps are included:
Step 1: putting the raw materials into high-speed mixer 1, after being mixed by high-speed mixer 1 in discharging to the first hopper 2；
Step 2: the material in the first hopper 2 is delivered to by 4 top of cooling mixing machine by the first conveying device 3, and is mixed from cooling
The receiving hopper 22 of 4 upper end of conjunction machine is sent into cooling mixing machine 4, after cooling mixing, is exited into the second hopper 5；
Step 3: the material in second hopper 5 is delivered in the first double screw extruder 7 by the second conveying device 6, by adding
Hot extrusion enters in extrusion device 8, will expect that third conveying is squeezed out and fallen in from the discharging curved mouth 85 of lower end by vacuum pump 83
On device 9, expect at this time in a strip shape；
Step 4: material in a strip shape is sent to pelleter 10 by third conveying device 9, is cut into transparent by pelleter 10
Grain, and be sent into third hopper 11；
Particle in third hopper 11: being delivered in the second double screw extruder 13 by step 5 by the 4th conveying device 12,
It pressurizes by heating and passes through extrusion die head, finally squeeze out polrvinyl chloride product.
Use principle: this assembly line is provided with high-speed mixer 1, cooling mixing machine 4, the first double screw extruder 7, squeezes out
Device 8, pelleter 10 and the second double screw extruder 13, are provided with the first hopper between high-speed mixer 1 and cooling mixing machine 4
2 and first conveying device 3, the second hopper 5 and the second conveying are provided between cooling mixing machine 4 and the first double screw extruder 7
Device 6 is provided with third conveying device 9, pelleter 10 and the second double screw extruder 13 between extrusion device 8 and pelleter 10
Between be provided with third hopper 11 and the 4th conveying device 12, coherent assembly line through the invention, production process is without artificial
Batch turning is carried out, time saving and energy saving, cost of labor substantially reduces, and efficiency greatly improves, although being coherent production on this assembly line,
It can be replaced at any time once having equipment damage without carrying out Hard link between capital equipment, will not influence production process.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (7)
1. a kind of production line of polrvinyl chloride product, it is characterised in that: including high-speed mixer (1), the first hopper (2),
First conveying device (3), cooling mixing machine (4), the second hopper (5), the second conveying device (6), the first double screw extruder
(7), extrusion device (8), third conveying device (9), pelleter (10), third hopper (11), the 4th conveying device (12), second
Discharge port one end of double screw extruder (13) and extrusion die head (14), the high-speed mixer (1) is provided with the first hopper
(2), the first conveying device (3) one end setting is in the first hopper (2), the first conveying device (3) other end setting
Discharge port one end of the feed inlet upper end of cooling mixing machine (4), the cooling mixing machine (4) is provided with the second hopper (5), institute
The setting of the second conveying device (6) one end is stated in the second hopper (5), the second conveying device (6) other end is set to first
The feed inlet upper end of double screw extruder (7), first double screw extruder (7) far from the second conveying device (6) one end with
Extrusion device (8) is connected, and described third conveying device (9) one end is set to the discharge port lower end of extrusion device (8) bottom end, described
Third conveying device (9) other end is set to the feed inlet upper end of pelleter (10), and the discharge outlet of the pelleter (10) is set
It is equipped with third hopper (11), the setting of the 4th conveying device (12) one end is in third hopper (11), the 4th conveying dress
The feed inlet upper end that (12) other end is set to the second double screw extruder (13) is set, second double screw extruder (13) is remote
Extrusion die head (14) are installed from the 4th conveying device (12) one end.
2. a kind of production line of polrvinyl chloride product according to claim 1, it is characterised in that: first hopper
(2), motor reducer assembly (15) are provided on the outside of the second hopper (5), third hopper (11) and third conveying device (9),
First hopper (2), the second hopper (5) and third hopper (11) two sides are provided with active axis hole, first hopper
(2), the second hopper (5) and the internal both ends of third hopper (11) are provided with slope, the slope of the first hopper (2) interior ramp
Spend, the gradient and second conveying device of second hopper (5) interior ramp corresponding with the first conveying device (3) setting angle
(6) setting angle is corresponding, the gradient and the 4th conveying device (12) setting angle phase of third hopper (11) interior ramp
It is corresponding.
3. a kind of production line of polrvinyl chloride product according to claim 1, it is characterised in that: first hopper
(2) and the second hopper (5) upper surface is provided with material receiving port (16), and the third hopper (11) is closely opened from pelleter (10) one end
There is opening.
4. a kind of production line of polrvinyl chloride product according to claim 1, it is characterised in that: first conveying
Device (3), the second conveying device (6), the structure of third conveying device (9) and the 4th conveying device (12) are consistent, and described first
Conveying device (3), the second conveying device (6), third conveying device (9) and the 4th conveying device (12) are by side plate (17), branch
Frame (18), driven voller (19), drive roll (20) and conveyer belt (21) are constituted, and the bracket (18) is connected with side plate (17), described
It is provided between side plate (17) several driven vollers (19), is provided with drive roll (20) between side plate (17) bottom, it is described defeated
It send band (21) to be wrapped on the outside of driven voller (19) and drive roll (20), is provided with several anti-skid bulges on the conveyer belt (21)
Item, drive roll (20) the both ends difference of first conveying device (3), the second conveying device (6) and the 4th conveying device (12)
It is set in the active axis hole of the first hopper (2), the second hopper (5) and third hopper (11) two sides and drive roll (20) one end is logical
It crosses transmission belt to be connected with motor reducer assembly (15), the driving shaft and motor reducer assembly of the third conveying device (9)
(15) direct-connected.
5. a kind of production line of polrvinyl chloride product according to claim 1, it is characterised in that: the cooling mixing
Machine (4) upper end is provided with receiving hopper (22).
6. a kind of production line of polrvinyl chloride product according to claim 1, it is characterised in that: the extrusion device
(8) include extrusion device main body (81), connecting flange (82), vacuum pump (83), support leg (84) and discharging curved mouth (85), it is described
Extrusion device main body (81) side is provided with connecting flange (82), and extrusion device main body (81) upper surface is provided with vacuum pump
(83), extrusion device main body (81) lower surface is provided with several support legs (84), extrusion device main body (81) following table
Face middle position is provided with discharging curved mouth (85).
7. a kind of production line of polrvinyl chloride product according to claim 1, it is characterised in that: its application method packet
Include following steps:
Step 1: putting the raw materials into high-speed mixer (1), discharges after being mixed by high-speed mixer (1) to the first hopper
(2) in；
Material in first hopper (2): being delivered to above cooling mixing machine (4) by step 2 by the first conveying device (3), and from
The receiving hopper (22) of cooling mixing machine (4) upper end is sent into cooling mixing machine (4), after cooling mixing, exits into the
In two hoppers (5)；
Material in second hopper (5): being delivered in the first double screw extruder (7) by step 3 by the second conveying device (6),
It is pressed into extrusion device (8) by heating, will expect to squeeze out simultaneously from the discharging curved mouth (85) of lower end by vacuum pump (83)
It falls on third conveying device (9), expects at this time in a strip shape；
Step 4: material in a strip shape is sent to pelleter (10) by third conveying device (9), is cut by pelleter (10)
Transparent grain, and be sent into third hopper (11)；
Step 5: the particle in third hopper (11) is delivered to by the second double screw extruder by the 4th conveying device (12)
(13) it in, pressurizes by heating and passes through extrusion die head, finally squeeze out polrvinyl chloride product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910671452.5A CN110370489A (en) | 2019-07-24 | 2019-07-24 | A kind of production line of polrvinyl chloride product |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910671452.5A CN110370489A (en) | 2019-07-24 | 2019-07-24 | A kind of production line of polrvinyl chloride product |
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| Publication Number | Publication Date |
|---|---|
| CN110370489A true CN110370489A (en) | 2019-10-25 |
Family
ID=68255437
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910671452.5A Pending CN110370489A (en) | 2019-07-24 | 2019-07-24 | A kind of production line of polrvinyl chloride product |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112571658A (en) * | 2020-11-25 | 2021-03-30 | 石家庄熙荣机械有限公司 | Degradable plastic product production line |
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| CN202623051U (en) * | 2012-03-30 | 2012-12-26 | 杭州浙地矿产科技有限公司 | Polyolefin function masterbatch production system |
| US20170173839A1 (en) * | 2012-04-27 | 2017-06-22 | King Abdulaziz City For Science And Technology | Integrated single and twin screw extruder |
| CN205870992U (en) * | 2016-08-08 | 2017-01-11 | 四川蜀羊防水材料有限公司 | Polyvinyl chloride waterproof coil's full automatic production line |
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| CN112571658A (en) * | 2020-11-25 | 2021-03-30 | 石家庄熙荣机械有限公司 | Degradable plastic product production line |
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Application publication date: 20191025 |