CN220864649U - Special dynamic valve needle structure for PET (polyethylene terephthalate) mould - Google Patents
Special dynamic valve needle structure for PET (polyethylene terephthalate) mould Download PDFInfo
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- CN220864649U CN220864649U CN202322646744.8U CN202322646744U CN220864649U CN 220864649 U CN220864649 U CN 220864649U CN 202322646744 U CN202322646744 U CN 202322646744U CN 220864649 U CN220864649 U CN 220864649U
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- 229920000139 polyethylene terephthalate Polymers 0.000 title description 25
- 239000005020 polyethylene terephthalate Substances 0.000 title description 25
- -1 polyethylene terephthalate Polymers 0.000 title description 3
- 238000002347 injection Methods 0.000 claims abstract description 72
- 239000007924 injection Substances 0.000 claims abstract description 72
- 238000001746 injection moulding Methods 0.000 claims abstract description 51
- 239000004033 plastic Substances 0.000 claims abstract description 41
- 229920003023 plastic Polymers 0.000 claims abstract description 41
- 238000000465 moulding Methods 0.000 claims description 23
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 13
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 13
- 241001330002 Bambuseae Species 0.000 claims description 13
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 13
- 239000011425 bamboo Substances 0.000 claims description 13
- 239000003292 glue Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 abstract description 13
- 239000012768 molten material Substances 0.000 abstract description 8
- 230000002087 whitening effect Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002991 molded plastic Substances 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model belongs to the technical field of molds, and particularly relates to a special dynamic valve needle structure for a PET mold. The needle valve injection molding main cylinder is arranged in the injection molding main plate. According to the utility model, the needle valve injection main cylinder is fixed with the injection main plate through the main gate fixing plate, the injection template is used for assisting in forming a PET plastic part, in the injection process, molten materials enter the injection gate pipe through the injection part, at the moment, a gate between the dynamic valve needle assembly and the injection gate pipe is opened, materials are filled and maintained pressure, injection is carried out, after injection is finished, the dynamic valve needle assembly is moved downwards, the gate between the dynamic valve needle assembly and the injection gate pipe is closed, at the moment, the dynamic valve needle assembly is pumped back upwards, so that the gate is neat and has no residue, the stress at the product injection gate can be removed, the problem of product stress whitening is effectively solved, and a material handle structure is not required to be arranged at the injection gate, so that the gate is flush.
Description
Technical Field
The utility model belongs to the technical field of molds, and relates to a special dynamic valve needle structure for a PET mold.
Background
The casting method on the PET mould mostly adopts a large gate mode, but the gate in the mode is larger, and the needle valve is also used for designing, so that the PET pipe blank is usually cast by adopting the needle valve, but a section of material handle with the height of about 0.5mm is required to be reserved at the casting position for removing stress to prevent blushing, and the excessive material handle is reserved at the product position and cannot be flushed with the gate. The large gate form needs manual trimming gate to increase cost, the residual gate section and the gate inlet area greatly influence the product appearance, the existing PET product needle valve is required to be provided with a section of reserved raised gate, and the problem that the gate can not be flushed due to the fact that an excessive material handle is left at the product position exists. Therefore, there is a great need to design a special dynamic valve needle structure for PET molds, which can overcome the above defects.
In order to overcome the defects in the prior art, people have continuously explored and put forward various solutions, for example, chinese patent discloses a gaoxinnengPET hot runner system structure [ application number: 202223018320.9] which comprises an injection mold, a valve needle assembly arranged in the injection mold and a nozzle structure matched with the valve needle assembly, wherein the nozzle structure is installed in the injection mold through flange matching and communicated with a runner of an injection mold flow distribution plate, the nozzle structure comprises a nozzle body, a nozzle tip communicated with the nozzle body, a heating copper sleeve sleeved outside the nozzle body, a clamp spring sleeved outside the nozzle body and propped against the bottom of the heating copper sleeve, a heat insulation gasket sleeved outside the nozzle tip, a spring disc sleeved on the nozzle body and a spring gasket, and the lower end of the spring disc is propped against the flange.
Disclosure of utility model
The utility model aims to solve the problems and provides a special dynamic valve needle structure for a PET (polyethylene terephthalate) die.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
The utility model provides a special dynamic needle structure of PET mould, includes the mainboard of moulding plastics, the mainboard below of moulding plastics be equipped with the template of moulding plastics, the mainboard of moulding plastics in be equipped with the needle valve and mould plastics the main section of thick bamboo, the needle valve mould plastics and be equipped with main runner fixed disk on the main section of thick bamboo, main runner fixed disk and the mainboard looks joint cooperation of moulding plastics, the needle valve mould plastics and be equipped with the runner pipe of moulding plastics in the main section of thick bamboo, the runner intraductal dynamic needle subassembly that is equipped with along vertical direction reciprocal rectilinear motion that moulds plastics, needle valve mould plastics and be equipped with between main section of thick bamboo and the main runner fixed disk and advance the piece of watering.
In the special dynamic valve needle structure of the PET mould, the dynamic valve needle assembly comprises a valve needle arranged in an injection molding sprue pipe, a piston member, an upper air inlet member and a lower air inlet member are arranged in the injection molding main cylinder of the valve needle, the piston member is connected with the valve needle, and the piston member is positioned between the upper air inlet member and the lower air inlet member.
In the special dynamic valve needle structure of the PET mould, the piston piece comprises a cylinder piston arranged in the needle valve injection main cylinder, the cylinder piston is connected with the valve needle, and the cylinder piston is in sliding fit with the needle valve injection main cylinder.
In the special dynamic valve needle structure for the PET die, the upper air inlet piece comprises an upper air inlet pipe arranged in the needle valve injection main cylinder, and the upper air inlet pipe corresponds to the position of the cylinder piston.
In the special dynamic valve needle structure for the PET die, the lower air inlet piece comprises an annular bottom insert seat arranged in the needle valve injection main cylinder, a lower air inlet pipe is arranged in the annular bottom insert seat, and a limiting pushing piece is arranged between the annular bottom insert seat and the cylinder piston.
In the special dynamic valve needle structure for the PET die, the limiting pushing piece comprises a limiting pushing piece arranged between the annular bottom insert seat and the cylinder piston, a pushing piece fixing cylinder is arranged between the needle injection main cylinder and the annular bottom insert seat, and the limiting pushing piece is positioned in the pushing piece fixing cylinder and is in sliding fit with the pushing piece fixing cylinder.
In the special dynamic valve needle structure for the PET die, the valve needle back-drawing stroke limiting convex plate is arranged at the bottom of the limiting push block, and the width of the valve needle back-drawing stroke limiting convex plate is larger than that of the limiting push block.
In the special dynamic valve needle structure for the PET die, the pouring piece comprises a pouring inner tube arranged between the needle valve injection main cylinder and the main gate fixing disc, and an injection main hole and an injection sub-runner are arranged in the pouring inner tube.
In the special dynamic valve needle structure for the PET die, two diversion corresponding channels and one glue injection channel are arranged in the injection gate pipe, and the diversion corresponding channels are communicated with the injection diversion channels.
In the special dynamic valve needle structure for the PET die, the valve needle extends into the glue injection channel.
Compared with the prior art, the utility model has the advantages that:
1. According to the utility model, the needle valve injection main cylinder is fixed with the injection main plate through the main gate fixing plate, the injection template is used for assisting in forming a PET plastic part, in the injection process, molten materials enter the injection gate pipe through the injection part, at the moment, a gate between the dynamic valve needle assembly and the injection gate pipe is opened, materials are filled and maintained pressure, injection is carried out, after injection is finished, the dynamic valve needle assembly is moved downwards, the gate between the dynamic valve needle assembly and the injection gate pipe is closed, at the moment, the dynamic valve needle assembly is pumped back upwards, so that the gate is neat and has no residue, the stress at the product injection gate can be removed, the problem of product stress whitening is effectively solved, and a material handle structure is not required to be arranged at the injection gate, so that the gate is flush.
2. When the valve needle is required to be driven to draw back upwards, high-pressure gas is injected through the lower air inlet pipe, the limiting push block drives the cylinder piston and the valve needle to draw back upwards, the valve needle drawing back stroke limiting convex plate can limit the upward drawing back stroke of the cylinder piston and the valve needle, the gate is ensured to be neat and free of residues, and the aim of gate leveling is achieved.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a partial structural schematic of the present utility model.
Fig. 3 is a schematic view of a partial structure of another aspect of the present utility model.
Fig. 4 is a schematic partial cross-sectional view of the present utility model.
In the figure: the injection molding main board 1, the injection molding template 2, the needle valve injection molding main cylinder 3, the main gate fixing disk 33, the injection molding gate pipe 4, the dynamic valve needle assembly 5, the injection molding piece 6, the valve needle 7, the piston piece 8, the upper air inlet piece 9, the lower air inlet piece 10, the cylinder piston 11, the upper air inlet pipe 12, the annular bottom insert seat 13, the lower air inlet pipe 133, the limiting pushing piece 14, the limiting pushing piece 15, the pushing piece fixing cylinder 16, the valve needle back-pumping stroke limiting convex plate 17, the injection molding inner pipe 18, the injection molding main hole 19, the injection molding sub-runner 20, the split corresponding runner 21 and the injection molding runner 22.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
As shown in fig. 1-4, a special dynamic valve needle structure of PET mould, including moulding plastics mainboard 1, moulding plastics mainboard 1 below be equipped with moulding plastics template 2, moulding plastics mainboard 1 in be equipped with needle valve and mould plastics main section of thick bamboo 3, needle valve mould plastics and be equipped with main runner fixed disk 33 on the main section of thick bamboo 3, main runner fixed disk 33 and moulding plastics mainboard 1 looks joint cooperation, needle valve mould plastics and be equipped with in main section of thick bamboo 3 and mould plastics runner pipe 4, moulding plastics runner pipe 4 in be equipped with can follow vertical direction reciprocating rectilinear motion's dynamic valve needle subassembly 5, needle valve mould plastics and be equipped with between main section of thick bamboo 3 and the main runner fixed disk 33 and advance pouring member 6.
In this embodiment, the main section of thick bamboo 3 is moulded plastics with the needle valve through main runner fixed disk 33 and is moulded plastics mainboard 1 and fix, mould plastics template 2 and be used for assisting the shaping PET mould, in the injection molding process, the molten material is through advancing pouring piece 6 and get into in the runner pipe 4 of moulding plastics, the runner between dynamic valve needle subassembly 5 and the runner pipe 4 of moulding plastics is opened this moment, the material is filled, the pressurize, carry out the injection molding, accomplish the back of moulding plastics, move down dynamic valve needle subassembly 5, close the runner between dynamic valve needle subassembly 5 and the runner pipe 4 of moulding plastics, take back dynamic valve needle subassembly 5 again this moment, make runner department neat no remain, the stress of product entering runner department can be got rid of, effectively solve the problem that product stress is whitened, and advance the pouring department and need not to set up the material handle structure, reach the runner parallel and level.
Referring to fig. 1-4, the dynamic valve needle assembly 5 includes a valve needle 7 disposed in an injection gate tube 4, a piston member 8, an upper air inlet member 9 and a lower air inlet member 10 are disposed in the needle injection main barrel 3, the piston member 8 is connected to the valve needle 7, and the piston member 8 is disposed between the upper air inlet member 9 and the lower air inlet member 10.
Specifically speaking, in the injection molding process, the molten material enters into the injection molding sprue tube 4 through the pouring inlet piece 6, at this moment, the sprue between the valve needle 7 and the injection molding sprue tube 4 is opened, the material is filled and maintained, injection molding is carried out, after injection molding is completed, the valve needle 7 is moved downwards, the sprue between the valve needle 7 and the injection molding sprue tube 4 is closed, at this moment, the valve needle 7 is pumped back upwards, the stress at the pouring inlet position can be removed, the problem of product stress whitening is effectively solved, a material handle structure is not required to be arranged at the pouring inlet position, the sprue level is reached, the upper air inlet piece 9 is used for driving the piston piece 8 to move downwards with the valve needle 7, and the lower air inlet piece 10 is used for driving the piston piece 8 to move upwards and back to pump the valve needle 7.
The piston member 8 comprises a cylinder piston 11 arranged in the needle valve injection molding main cylinder 3, the cylinder piston 11 is connected with the needle valve 7, and the cylinder piston 11 is in sliding fit with the needle valve injection molding main cylinder 3.
In this embodiment, the cylinder piston 11 is used to drive the valve needle 7 to move up and down, and the internal structure is compact and reasonable.
As shown in fig. 3 and 4, the upper air inlet member 9 includes an upper air inlet pipe 12 disposed in the needle valve injection molding main cylinder 3, and the upper air inlet pipe 12 corresponds to the position of the cylinder piston 11.
In this embodiment, when it is necessary to drive the valve needle 7 downward, high-pressure gas is injected through the upper intake pipe 12 to move the cylinder piston 11 and the valve needle 7 downward.
The lower air inlet piece 10 comprises an annular bottom insert seat 13 arranged in the needle valve injection molding main cylinder 3, a lower air inlet pipe 133 is arranged in the annular bottom insert seat 13, and a limiting push piece 14 is arranged between the annular bottom insert seat 13 and the cylinder piston 11.
In this embodiment, the annular bottom insert seat 13 is fixed with the needle valve injection molding main cylinder 3 through a plurality of bolts, when the needle valve 7 needs to be driven to draw back upwards, high-pressure gas is injected through the lower air inlet pipe 133, the air cylinder piston 11 and the needle valve 7 are driven to draw back upwards through the limiting pushing piece 14, the limiting pushing piece 14 can limit the upward drawing back stroke of the air cylinder piston 11 and the needle valve 7, the regular and residue-free gate position is ensured, and the aim of gate leveling is achieved.
Referring to fig. 4, the limiting push member 14 includes a limiting push block 15 disposed between the annular bottom insert seat 13 and the cylinder piston 11, a push block fixing cylinder 16 is disposed between the needle injection molding main cylinder 3 and the annular bottom insert seat 13, the limiting push block 15 is disposed in the push block fixing cylinder 16 and is slidably matched with the push block fixing cylinder 16, a needle withdrawal stroke limiting convex plate 17 is disposed at the bottom of the limiting push block 15, and the width of the needle withdrawal stroke limiting convex plate 17 is greater than that of the limiting push block 15.
In this embodiment, when the valve needle 7 needs to be driven to draw back upwards, high-pressure gas is injected through the lower air inlet pipe 133, the limiting push block 15 drives the cylinder piston 11 and the valve needle 7 to draw back upwards, the valve needle drawing back stroke limiting convex plate 17 can limit the upward drawing back stroke of the cylinder piston 11 and the valve needle 7, the regular and residue-free gate is ensured, and the purpose of gate leveling is achieved.
Referring to fig. 1-4, the pouring member 6 includes a pouring inner tube 18 disposed between the needle valve injection main cylinder 3 and the main gate fixing plate 33, and an injection main hole 19 and an injection runner 20 are disposed in the pouring inner tube 18.
In this embodiment, in the injection molding process, the molten material is injected through the injection molding main hole 19 in the injection molding inner pipe 18, and is split through the injection molding split runner 20, so as to accelerate the injection molding rate.
As shown in fig. 4, two corresponding split channels 21 and one glue injection channel 22 are arranged in the injection gate tube 4, and the corresponding split channels 21 are communicated with the injection sub-channels 20.
In this embodiment, the molten material enters the corresponding split runner 21 through the injection split runner 20, and then enters the glue injection runner 22.
As shown in connection with fig. 4, the valve needle 7 extends into the glue injection channel 22.
In this embodiment, the valve pin 7 extends into the injection passage 22, and the gate can be opened and closed by moving the valve pin 7 up and down.
The working principle of the utility model is as follows:
The needle valve injection main cylinder 3 and the injection main plate 1 are fixed through the main gate fixing disc 33, the injection molding template 2 is used for assisting in forming PET plastic parts, in the injection molding process, molten materials are injected through the injection molding main hole 19 in the injection inner pipe 18 and are shunted through the injection molding shunt channel 20, the injection molding speed is accelerated, the molten materials enter the shunt corresponding channel 21 through the injection molding shunt channel 20 and then enter the injection glue channel 22, at the moment, the gate between the needle 7 and the injection sprue pipe 4 is opened, the materials are filled and pressure maintained, injection molding is carried out, after injection molding is finished, the needle 7 is moved downwards, the gate between the needle 7 and the injection sprue pipe 4 is closed, at the moment, the needle 7 is pulled back upwards again, so that the gate is neat and has no residue, the stress at the product gate inlet can be removed, the problem of product stress whitening is effectively solved, a material handle structure is not required to be arranged at the gate inlet, the gate level is reached, the upper air inlet piece 9 is used for driving the piston piece 8 and the needle 7 to move downwards, the lower air inlet piece 10 is used for driving the piston piece 8 and the needle 7 to move upwards back to move,
The cylinder piston 11 is used for driving the valve needle 7 to move up and down, the internal structure is compact and reasonable,
When the valve needle 7 needs to be driven to move downwards, high-pressure gas is injected through the upper air inlet pipe 12, the cylinder piston 11 and the valve needle 7 move downwards,
When the valve needle 7 needs to be driven to be drawn back upwards, high-pressure gas is injected through the lower air inlet pipe 133, the limiting push block 15 drives the cylinder piston 11 and the valve needle 7 to be drawn back upwards, the valve needle drawing stroke limiting convex plate 17 can limit the upward drawing stroke of the cylinder piston 11 and the valve needle 7, the order and no residue at the gate position are ensured, the aim of gate leveling is achieved,
In the injection molding process, the valve needle 7 extends into the glue injection channel 22, and the gate can be opened and closed by the up-and-down movement of the valve needle 7.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model.
Although terms of the injection molding main plate 1, the injection molding plate 2, the needle valve injection main cylinder 3, the main gate fixing plate 33, the injection molding gate pipe 4, the dynamic needle assembly 5, the injection molding member 6, the needle 7, the piston member 8, the upper air intake member 9, the lower air intake member 10, the cylinder piston 11, the upper air intake pipe 12, the annular bottom insert 13, the lower air intake pipe 133, the stopper pusher 14, the stopper pusher 15, the pusher fixing cylinder 16, the needle withdrawal stroke stopper boss 17, the injection molding inner pipe 18, the injection molding main hole 19, the injection molding runner 20, the runner counterpart 21, the injection runner 22, and the like are used more herein, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the nature of the utility model and should be construed in a manner consistent with their spirit and scope.
Claims (10)
1. The utility model provides a special dynamic needle structure of PET mould, includes mainboard (1) of moulding plastics, mainboard (1) below of moulding plastics be equipped with template (2) of moulding plastics, its characterized in that, mainboard (1) of moulding plastics in be equipped with needle valve and mould plastics main section of thick bamboo (3), needle valve mould plastics and be equipped with main runner fixed disk (33) on main section of thick bamboo (3), main runner fixed disk (33) and mainboard (1) of moulding plastics joint cooperation mutually, needle valve mould plastics and be equipped with runner pipe (4) of moulding plastics in main section of thick bamboo (3), runner pipe (4) of moulding plastics in be equipped with dynamic needle subassembly (5) that can follow vertical direction reciprocal rectilinear motion, needle valve mould plastics and be equipped with between main section of thick bamboo (3) and the main runner fixed disk (33) and advance pouring member (6).
2. The special dynamic valve needle structure for the PET mold according to claim 1, wherein the dynamic valve needle assembly (5) comprises a valve needle (7) arranged in an injection molding sprue pipe (4), a piston member (8), an upper air inlet member (9) and a lower air inlet member (10) are arranged in the injection molding main cylinder (3), the piston member (8) is connected with the valve needle (7), and the piston member (8) is positioned between the upper air inlet member (9) and the lower air inlet member (10).
3. The special dynamic valve needle structure for the PET mould according to claim 2, wherein the piston member (8) comprises a cylinder piston (11) arranged in the needle valve injection main cylinder (3), the cylinder piston (11) is connected with the valve needle (7), and the cylinder piston (11) is in sliding fit with the needle valve injection main cylinder (3).
4. A PET mould-specific dynamic valve needle structure according to claim 3, wherein the upper air inlet member (9) comprises an upper air inlet pipe (12) arranged in the needle valve injection main cylinder (3), and the upper air inlet pipe (12) corresponds to the position of the cylinder piston (11).
5. The special dynamic valve needle structure for the PET mold according to claim 4, wherein the lower air inlet piece (10) comprises an annular bottom insert seat (13) arranged in the needle valve injection main cylinder (3), a lower air inlet pipe (133) is arranged in the annular bottom insert seat (13), and a limiting pushing piece (14) is arranged between the annular bottom insert seat (13) and the cylinder piston (11).
6. The special dynamic valve needle structure for the PET mold according to claim 5, wherein the limiting pushing piece (14) comprises a limiting pushing piece (15) arranged between the annular bottom insert seat (13) and the cylinder piston (11), a pushing piece fixing cylinder (16) is arranged between the needle injection molding main cylinder (3) and the annular bottom insert seat (13), and the limiting pushing piece (15) is positioned in the pushing piece fixing cylinder (16) and is in sliding fit with the pushing piece fixing cylinder (16).
7. The special dynamic valve needle structure for the PET mold according to claim 6, wherein the bottom of the limiting push block (15) is provided with a valve needle withdrawal stroke limiting convex plate (17), and the width of the valve needle withdrawal stroke limiting convex plate (17) is larger than that of the limiting push block (15).
8. The special dynamic valve needle structure for the PET mould according to claim 7, wherein the pouring member (6) comprises a pouring inner tube (18) arranged between the needle valve injection main cylinder (3) and a main pouring gate fixing disc (33), and an injection main hole (19) and an injection sub-runner (20) are arranged in the pouring inner tube (18).
9. The special dynamic valve needle structure for the PET mould according to claim 8, wherein two corresponding split channels (21) and one glue injection channel (22) are arranged in the injection pouring gate tube (4), and the corresponding split channels (21) are communicated with the injection split channels (20).
10. A PET mould specific dynamic valve needle structure according to claim 9, wherein said valve needle (7) extends into the glue injection channel (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322646744.8U CN220864649U (en) | 2023-09-28 | 2023-09-28 | Special dynamic valve needle structure for PET (polyethylene terephthalate) mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322646744.8U CN220864649U (en) | 2023-09-28 | 2023-09-28 | Special dynamic valve needle structure for PET (polyethylene terephthalate) mould |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220864649U true CN220864649U (en) | 2024-04-30 |
Family
ID=90817438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322646744.8U Active CN220864649U (en) | 2023-09-28 | 2023-09-28 | Special dynamic valve needle structure for PET (polyethylene terephthalate) mould |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220864649U (en) |
-
2023
- 2023-09-28 CN CN202322646744.8U patent/CN220864649U/en active Active
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