CN208774026U - A kind of high leakproofness low noise pipe extruder - Google Patents
A kind of high leakproofness low noise pipe extruder Download PDFInfo
- Publication number
- CN208774026U CN208774026U CN201821189733.4U CN201821189733U CN208774026U CN 208774026 U CN208774026 U CN 208774026U CN 201821189733 U CN201821189733 U CN 201821189733U CN 208774026 U CN208774026 U CN 208774026U
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- Prior art keywords
- extruder
- low noise
- motor
- high leakproofness
- pipe
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Abstract
The utility model relates to tubular object extruding equipment technical fields, and in particular to a kind of high leakproofness low noise pipe extruder.Push material to extruder head extrusion molding again by screw charging ram, the setting for squeezing out the heater strip of header structure ensures that plastic liquid flow velocity is uniform, prevents plastic liquid from causing viscosity to become larger the extruder head that results in blockage due to temperature decline；The setting of cooling coil can be such that the tubing of output is cooled down, and discharging is rapid and will not stick in extruder head inner wall, further effectively prevent blocking；Extruder head can effectively improve the tubing intensity of extrusion, improve the quality of tubing；Extrusion body, which is integrated sealing structure, ensures that leakproofness prevents plastics from being influenced to cause mixing quality bad to influence tube forming effect by ambient temperature；Shell is equipped with puigging, reduces equipment noise.
Description
Technical field
The utility model relates to tubular object extruding equipment technical fields, and in particular to a kind of high leakproofness low noise pipe extrusion
Machine.
Background technique
Plastic pipe is as emerging forth generation New Building Materials after steel, timber, cement, and plastic pipe is because of tool
Have the advantages that small, energy saving water flow loss, section material, environmental protection, high-strength light, it is corrosion-resistant, construct and repair convenient, long service life,
It is widely used in building water supply and drainage, town and country plumbing, gas, electric power and cable jacket, industrial fluids conveying, agricultural irrigation
Etc. construction industries, municipal administration, industry and agriculture field, become the main force of new century urban construction pipe network；Mainly there are UPVC drainpipe, UPVC
Feed pipe, aluminum plastic composite pipe, polyethylene (PE) water-feeding pipes, polypropylene PPR hot-water line these types.
It needs to use plastic extruder in the production of the plastic pipes such as PE, MPP, after first carrying out colour mixture melting, and passes through
Novel head structure for producing plastic tube, which extracts raw material in Drying, dries, and is then squeezed out again.Extruder according to
Type of action can be divided into continuous extruder and discontinuous extruder.Plastic extruder is according to head stream direction and pitch line
Angle, head is divided into oblique head and right-angle handpiece.The shell of head is fixed by bolts on fuselage, the mold in head
Head inlet wire port is fixed on mold core seat, and with nut, and mold core is housed before head die core print seat, mold core and mold core seat
There is hole at center, for passing through core wire.
The plastic extruder of the prior art often has that structure is complicated, and equipment manufacturing costs are high, while leakproofness is poor leads
The pernicious gas release that tube forming effect is bad or tubing generates in mixing extrusion process is caused to cause the body of operator
The heart goes to bits；The hearing for generating huge noise effect operator in the course of work there are also extruder is healthy.
Utility model content
Above-mentioned to solve the problems, such as, the purpose of this utility model is to provide a kind of high leakproofness low noise pipes to squeeze
Machine out.
In order to achieve the above objectives, the technical solution adopted in the utility model is: a kind of high leakproofness low noise pipe extrusion
Machine, the extrusion body including cylindrical structure shape, the extrusion body is integrated sealing structure and case surface is equipped with soundproof plate layer；
Feeding device is equipped on the outside of described extrusion body one end, the feeding device includes the feeding cylinder of inverted cone-shaped structure shape, it is described into
Barrel lower end is connected with the feed tube for being arranged obliquely and extending to and squeeze out internal body, and the feeding cylinder is connected with feed tube
It is logical；The extrusion body upper end is equipped with water tank, and the tank top upper end is equipped with rotating electric machine, the rotating electric machine lower end connection
There is hollow rotary shaft, the hollow rotary shaft extends in extruder body through water tank bottom, in the hollow rotary shaft inside
Between be equipped with runner, the hollow rotary shaft lower end is connected with rotating disk, and the rotating disk lower end is equipped with sprinkling mouth, the runner point
Not be connected to water tank and rotating disk；The extruder body interior lower end is equipped with spiral pusher device, the spiral pusher device packet
Screw charging ram and first motor are included, the lower end and described that extruder is located at feeding device in vitro is arranged in the first motor
One motor is arranged in the rack for squeezing out the setting of body bottom end, and shock-absorption backing plate is equipped between the first motor and rack, described
Screw charging ram is equipped with several spiral pusher pieces；It is equipped with and squeezes out at the extrusion body lower end and material-pulling device relative position
Head, the extruder head spiral winding are connected with cooling coil, and the water outlet of the cooling coil connects tank by outlet pipe
Water inlet, the water inlet of the cooling coil connects the water outlet of tank by water inlet pipe and is located at tank and extruder head
Between be equipped with heat exchanger, be equipped with the first electrically-controlled valve on the water inlet pipe and outlet pipe, the water outlet of the tank is equipped with
Filter, the tank bottom end are equipped with sewage draining exit；Cavity structure and cavity structure are equipped in the extruder body between outer wall
Inside it is wound with several heating tubes；Sound-proof shield is equipped with outside the first motor and rotating electric machine.
Preferably, one side wall is equipped with a stock guide being arranged obliquely in the feeding cylinder and the lower end of the stock guide is prolonged
The inlet of feed tube is extended to, the stock guide inclined direction is consistent with material feedstock direction.Stock guide is in addition to being used for guide also
The effect that buffering can be played prevents material from causing the damage of feeding cylinder to carrying out collision between feeding cylinder inside when being added.
Preferably, agitating device is equipped in the feed tube, the agitating device includes that stirring rod and driving stirring rod stir
The second motor mixed, the second motor setting annular on feeding cylinder lower end outside, the stirring rod are equipped with several transversal
Sound-proof shield also is provided with outside face stirrer gear triangular in shape and second motor.Convenient for the preliminary mixing and raising charging of material
Effect, the stirrer gear of triangle also have the function of that cutting material, sound-proof shield not only can also protect motor with sound insulation and noise reduction.
Preferably, the rotating disk upper end is equipped with a dashpot, and the dashpot is connected to runner and sprinkling mouth respectively.
Preferably, the sprinkling mouth cross section squeezes out organism bottom in horn-like and flared end direction.Convenient for extruder
Internal portion carries out cleaning and comprehensive is cleaned.
Preferably, the hollow rotary shaft outer end is equipped with sleeve, and described sleeve pipe and extrusion body junction are equipped with sealing
Circle, described sleeve pipe are equipped with the arc diversion trench of joining water box and runner.
Preferably, the extruder head includes feed inlet, buffering inner cavity, discharge port and porous plate, the feed inlet and buffering
Inner cavity connection, the buffering inner cavity is connected to discharge port and the inlet port and outlet port position mutually staggers setting, described more
Orifice plate is arranged on the outside of discharge port end.So that the flow velocity of plastic liquid is consistent, thickness when guaranteeing tube forming is uniform, improves
The intensity of tubing.
Preferably, it is equipped with first inner chamber in the extruder head, is equipped with heater strip in the first inner chamber, is located at described first
It is equipped with second inner chamber on the outside of inner cavity, is equipped with cooling coil in the second inner chamber, is located at the second inner chamber outer end and is equipped with sound insulation
The water inlet of outer layer, the cooling coil is arranged close to discharge port end, and water outlet is arranged close to feed inlet end.The setting of heater strip
Prevent the decline of plastic liquid temperature from causing plastic liquid viscosity is excessive extruder head is caused to block；Using cooling water and material extrusion side
To reverse mode, more preferably, molding is rapidly and effect is good for cooling effect, further decreases the generation of extruder head blocking.
It preferably, further include control device, the control device is arranged on the rack at front position and control device control
First motor, the second motor, rotating electric machine, the first electrically-controlled valve, the second electrically-controlled valve, heating tube and heater strip processed.
Preferably, the extrusion body bottom end is equipped with thermal insulation thermal insulation board.Play the effect of heat-insulation and heat-preservation.
The utility model has the beneficial effects that: a kind of high leakproofness low noise pipe extruder of the utility model, leads to
It crosses screw charging ram and pushes material to extruder head extrusion molding again, the setting for squeezing out the heater strip of header structure ensures plastic liquid stream
It is fast uniformly, prevent plastic liquid from causing viscosity to become larger the extruder head that results in blockage due to temperature decline；The setting of cooling coil can make
The tubing of output is cooled down, and discharging is rapid and will not stick in extruder head inner wall, further effectively prevent blocking；Extruder head can be with
The tubing intensity for effectively improving extrusion, improves the quality of tubing；Extrusion body, which is integrated sealing structure, ensures that leakproofness prevents from moulding
Material is influenced to cause mixing quality bad to influence tube forming effect by ambient temperature；Shell is equipped with puigging, reduces equipment
Noise.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model；
Fig. 2 is the extruder head sectional structure chart of the utility model；
Fig. 3 is the hollow rotary shaft structural schematic diagram of the utility model.
Wherein, 1- squeezes out body, 2- rack, 3- feeding cylinder, 31- feed tube, 32- stock guide, 4- screw charging ram, 41-
Spiral pusher piece, 5- extruder head, 51- feed inlet, 52- discharge port, 53- buffering inner cavity, 54- first inner chamber, 541- heater strip,
55- second inner chamber, 551- cooling coil, 5511- water inlet, 5512- water outlet, 56- sound insulation outer layer, 57- porous plate, 6- first
Motor, 61- sound-proof shield, 62- vibration attenuation pad, 7- stirring rod, 71- stirrer gear, the second motor of 8-, 9- cavity, 10- heating tube,
11- thermal insulation thermal insulation board, 12- water inlet pipe, 13- outlet pipe, 14- tank, 15- heat exchanger, 16- filter, 17- sewage draining exit, 18-
Control device, 19- water tank, 20- rotating electric machine, 21- casing, 22- hollow rotary shaft, 23- arc diversion trench, 24- rotating disk,
25- dashpot, 26- spray mouth.
Specific embodiment
To keep the purpose, technical scheme and beneficial effects of the utility model embodiment clearer, below in conjunction with this reality
With novel attached drawing, the technical solutions in the embodiments of the present invention are clearly and completely described, it is clear that described
Embodiment is only a part of the embodiment of the utility model, rather than whole embodiments.Based on the implementation in the utility model
Example, those of ordinary skill in the art's every other embodiment obtained without creative labor, all belongs to
In the protection scope of the utility model.
In the description of the present invention, it should be understood that term " on ", "lower", "front", "rear", "left", "right",
The orientation or positional relationship of the instructions such as "top", "bottom", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only
For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific
Orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limitation of the utility model.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or integrally connected；It can be with
It is to be connected directly, the connection inside two elements can also be can be indirectly connected through an intermediary.For the general of this field
For logical technical staff, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Unless otherwise defined, the technical term or scientific term furthermore used is should be in the utility model fields
The ordinary meaning that personage with general technical ability is understood.Make in the utility model patent application specification and claims
The similar word such as "one" or " one " does not indicate that quantity limits yet, but indicates that there are at least one.
As shown in Figure 1-3, as the embodiments of the present invention, a kind of high leakproofness low noise pipe extruder, including
The extrusion body 1 of cylindrical structure shape, the extrusion body 1 is integrated sealing structure and case surface is equipped with soundproof plate layer and (does not scheme
Show)；Feeding device is equipped on the outside of described 1 one end of extrusion body, the feeding device includes the feeding cylinder 3 of inverted cone-shaped structure shape,
3 lower end of feeding cylinder is connected with the feed tube 31 for being arranged obliquely and extending to and squeeze out inside body 1,3 He of feeding cylinder
Feed tube 31 is connected；One side wall is equipped with a stock guide 32 being arranged obliquely and the stock guide 32 in the feeding cylinder 3
Lower end extends to the inlet of feed tube 31, and 32 inclined direction of stock guide is consistent with material feedstock direction；Stock guide in addition to
The effect that buffering can also be played for guide, prevent material when being added to carried out between feeding cylinder inside collision cause feeding cylinder
Damage；Agitating device is equipped in the feed tube 31, the agitating device includes that stirring rod 7 and driving stirring rod 7 stir
Second motor 8, the setting of the second motor 8 annular on 3 lower end outside of feeding cylinder, the stirring rod 7 are equipped with several transversal
Sound-proof shield (not shown) also is provided with outside face stirrer gear 71 triangular in shape and second motor 8.Convenient for the preliminary mixed of material
Charging effect is closed and improves, the stirrer gear of triangle also has the function of cutting material, and sound-proof shield not only can be with sound insulation and noise reduction
Motor can also be protected；1 upper end of extrusion body is equipped with water tank 19, and the 19 top upper end of water tank is equipped with rotating electric machine 20, institute
It states 20 lower end of rotating electric machine and is connected with hollow rotary shaft 22, the hollow rotary shaft 22 is through 19 bottom of water tank and extends to extrusion
In body 1,22 bosom of hollow rotary shaft is equipped with runner, and 22 lower end of hollow rotary shaft is connected with rotating disk 24,
24 lower end of rotating disk is equipped with sprinkling mouth 26, and the runner is connected to water tank 19 and rotating disk 24 respectively；The extrusion body 1
Interior lower end is equipped with spiral pusher device, and the spiral pusher device includes screw charging ram 4 and first motor 6, and described first
The lower end for being located at feeding device outside extrusion body 1 is arranged in motor 6 and the setting of the first motor 6 is set in extrusion 1 bottom end of body
In the rack 2 set, shock-absorption backing plate 62 is equipped between the first motor 6 and rack 2, the screw charging ram 4 is equipped with several
Spiral pusher piece 41；Extruder head 5,5 spiral of extruder head are equipped at 1 lower end of extrusion body and material-pulling device relative position
Being intertwined and connected has cooling coil 551, the water outlet 5512 of the cooling coil 551 by outlet pipe 13 connect tank 14 into
The water inlet 5511 at the mouth of a river, the cooling coil 551 connects the water outlet of tank 14 by water inlet pipe 12 and is located at tank
Heat exchanger 15 is equipped between 14 and extruder head 5, as the present embodiment, more preferably a kind of mode, the heat exchanger 15 are condenser,
It is equipped on the water inlet pipe 12 and outlet pipe 13 first electrically-controlled valve (not shown), the water outlet of the tank 14 was equipped with
Filter 16,14 bottom end of tank are equipped with sewage draining exit 17；9 structure of cavity and sky are equipped between 1 inside and outside wall of extrusion body
It is wound with several heating tubes 10 in 9 structure of chamber, is equipped with resistance heating wire inside the heating tube 10；The first motor 6 and rotation
Sound-proof shield is equipped with outside rotating motor 20.
As this implementation, more preferably a kind of mode, shown feed tube lower end are under structure setting obliquely and stirring rod
End is also in structure setting obliquely, and the angle of the two obliquely can be the same or different and misalignment angle is 5-15 ° and is
It is excellent.
As shown in figure 3,24 upper end of rotating disk be equipped with a dashpot 25, the dashpot 25 respectively with runner and sprinkling
Mouth 26 is connected to.26 cross section of sprinkling mouth squeezes out 1 bottom of body in horn-like and flared end direction.Convenient for in extruder body
Portion carries out cleaning and comprehensive is cleaned.
22 outer end of hollow rotary shaft is equipped with sleeve 21, and described sleeve pipe 21 and extrusion 1 junction of body are equipped with sealing
It is not shown to enclose 9(), described sleeve pipe 21 is equipped with the arc diversion trench 23 of joining water box 19 and runner.
As shown in Fig. 2, the extruder head 5 includes feed inlet 51, buffers inner cavity 53, discharge port 52 and porous plate 57, it is described
Feed inlet 51 is connected to buffering inner cavity 53, and the buffering inner cavity 53 is connected to discharge port 52 and the feed inlet 51 and discharge port 52
Position mutually staggers setting, and the porous plate 57 is arranged on the outside of 52 end of discharge port.It is furthermore preferred that described in the present embodiment into
The diameter and quantity of material mouth 51 are consistent with discharge port 52；So that the flow velocity of plastic liquid is consistent, guarantee thickness when tube forming
Degree uniformly, improves the intensity of tubing.It is equipped with first inner chamber 54 in the extruder head 5, is equipped with heater strip in the first inner chamber 54
541, it is located on the outside of the first inner chamber 54 and is equipped with second inner chamber 55, is equipped with cooling coil 551 in the second inner chamber 55, is located at
551 outer end of second inner chamber is equipped with sound insulation outer layer 56, and the water inlet 5511 of the cooling coil 551 is set close to 52 end of discharge port
It sets, water outlet 5512 is arranged close to 51 end of feed inlet.The setting of heater strip prevents the decline of plastic liquid temperature from leading to plastic liquid
Viscosity is excessive to cause extruder head to block；In such a way that cooling water and material extrusion direction are reverse, cooling effect more preferably, is formed fast
Fast and effect is good, further decreases the generation of extruder head blocking.
It further include control device 18, the control device 18 is arranged on the rack at 2 front positions and control device 18 is controlled
First motor 6 processed, the second motor 8, rotating electric machine 20, the first electrically-controlled valve (not shown), the second electrically-controlled valve (not shown), heating tube
10 and heater strip 541.
1 bottom end of extrusion body is equipped with thermal insulation thermal insulation board 11.Play the effect of heat-insulation and heat-preservation.
Finally, it should be noted that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application.To the greatest extent
Pipe is described in detail the utility model referring to above-described embodiment, those skilled in the art should understand that, it can be with
The technical solution of utility model is modified or replaced equivalently, without departing from the range of technical solutions of the utility model,
It should all cover in the scope of the claims of the utility model.
Claims (10)
1. a kind of high leakproofness low noise pipe extruder, which is characterized in that the extrusion body including cylindrical structure shape, it is described to squeeze
Body is integrated sealing structure out and case surface is equipped with soundproof plate layer；Feeding device is equipped on the outside of described extrusion body one end,
The feeding device includes the feeding cylinder of inverted cone-shaped structure shape, the feeding cylinder lower end be connected be arranged obliquely and extend to it is crowded
The feed tube of internal body out, the feeding cylinder are connected with feed tube；The extrusion body upper end is equipped with water tank, the water tank
Top upper end is equipped with rotating electric machine, and the rotating electric machine lower end is connected with hollow rotary shaft, and the hollow rotary shaft runs through water tank
Bottom extends in extruder body, and the hollow rotary shaft bosom is equipped with runner, and the hollow rotary shaft lower end is connected with
Rotating disk, the rotating disk lower end are equipped with sprinkling mouth, and the runner is connected to water tank and rotating disk respectively；In the extruder body
Subordinate end is equipped with spiral pusher device, and the spiral pusher device includes screw charging ram and first motor, the first motor
Be arranged in extruder be located in vitro feeding device lower end and the first motor be arranged in squeeze out body bottom end setting rack
On, shock-absorption backing plate is equipped between the first motor and rack, the screw charging ram is equipped with several spiral pusher pieces；It is described
It squeezing out and is equipped with extruder head at body lower end and material-pulling device relative position, the extruder head spiral winding is connected with cooling coil,
The water outlet of the cooling coil connects the water inlet of tank by outlet pipe, and the water inlet of the cooling coil passes through water inlet
Pipe connects the water outlet of tank and is equipped with heat exchanger between tank and extruder head, on the water inlet pipe and outlet pipe
Equipped with the first electrically-controlled valve, the water outlet of the tank is equipped with filter, and the tank bottom end is equipped with sewage draining exit；It is described to squeeze
It is equipped in cavity structure and cavity structure between body inside and outside wall out and is wound with several heating tubes；The first motor and electric rotating
Sound-proof shield is equipped with outside machine.
2. a kind of high leakproofness low noise pipe extruder according to claim 1, which is characterized in that in the feeding cylinder
One side wall extends to the inlet of feed tube, the guide equipped with the lower end of a stock guide being arranged obliquely and the stock guide
Plate inclined direction is consistent with material feedstock direction.
3. a kind of high leakproofness low noise pipe extruder according to claim 2, which is characterized in that in the feed tube
Equipped with agitating device, the agitating device includes the second motor of stirring rod and driving stirring rod stirring, and second motor is set
It sets the annular on feeding cylinder lower end outside, the stirring rod and is equipped with several cross sections stirrer gear triangular in shape and described second
Sound-proof shield also is provided with outside motor.
4. a kind of high leakproofness low noise pipe extruder according to claim 1, which is characterized in that in the rotating disk
End is equipped with a dashpot, and the dashpot is connected to runner and sprinkling mouth respectively.
5. a kind of high leakproofness low noise pipe extruder according to claim 4, which is characterized in that the sprinkling mouth is horizontal
Section squeezes out organism bottom in horn-like and flared end direction.
6. a kind of high leakproofness low noise pipe extruder according to claim 1 or 4, which is characterized in that described hollow
Rotary shaft outer end is equipped with sleeve, and described sleeve pipe and extrusion body junction are equipped with sealing ring, and described sleeve pipe is equipped with connection water
The arc diversion trench of case and runner.
7. a kind of high leakproofness low noise pipe extruder according to claim 1, which is characterized in that the extruder head packet
It includes feed inlet, buffering inner cavity, discharge port and porous plate, the feed inlet to be connected to buffering inner cavity, the buffering inner cavity and discharging
Mouth connection and the inlet port and outlet port position mutually stagger setting, and the porous plate is arranged on the outside of discharge port end.
8. a kind of high leakproofness low noise pipe extruder according to claim 7, which is characterized in that in the extruder head
Equipped with first inner chamber, it is equipped with heater strip in the first inner chamber, is located on the outside of the first inner chamber and is equipped with second inner chamber, described the
It is intracavitary in two to be equipped with cooling coil, it is located at the second inner chamber outer end and is equipped with sound insulation outer layer, the water inlet of the cooling coil leans on
Nearly discharge port end setting, water outlet are arranged close to feed inlet end.
9. a kind of high leakproofness low noise pipe extruder according to claim 1, which is characterized in that further include control dress
It sets, the control device is arranged on the rack at front position and control device control first motor, the second motor, electric rotating
Machine, the first electrically-controlled valve, the second electrically-controlled valve, heating tube and heater strip.
10. according to claim 1 or a kind of high leakproofness low noise pipe extruder described in 9, which is characterized in that the extrusion
Body bottom end is equipped with thermal insulation thermal insulation board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821189733.4U CN208774026U (en) | 2018-07-26 | 2018-07-26 | A kind of high leakproofness low noise pipe extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821189733.4U CN208774026U (en) | 2018-07-26 | 2018-07-26 | A kind of high leakproofness low noise pipe extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208774026U true CN208774026U (en) | 2019-04-23 |
Family
ID=66154847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821189733.4U Expired - Fee Related CN208774026U (en) | 2018-07-26 | 2018-07-26 | A kind of high leakproofness low noise pipe extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208774026U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113199726A (en) * | 2021-04-08 | 2021-08-03 | 福建融音塑业科技有限公司 | Plastic tubing extrusion lines of low noise |
-
2018
- 2018-07-26 CN CN201821189733.4U patent/CN208774026U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113199726A (en) * | 2021-04-08 | 2021-08-03 | 福建融音塑业科技有限公司 | Plastic tubing extrusion lines of low noise |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190423 Termination date: 20200726 |
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| CF01 | Termination of patent right due to non-payment of annual fee |