CN114211691A - Nitrogen auxiliary forming die - Google Patents

Nitrogen auxiliary forming die Download PDF

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Publication number
CN114211691A
CN114211691A CN202111557240.8A CN202111557240A CN114211691A CN 114211691 A CN114211691 A CN 114211691A CN 202111557240 A CN202111557240 A CN 202111557240A CN 114211691 A CN114211691 A CN 114211691A
Authority
CN
China
Prior art keywords
nitrogen
hole
side wall
arc
mounting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202111557240.8A
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Chinese (zh)
Inventor
蒋兴龙
邓建平
吴亮
刘小明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SUZHOU XINLONG PLASTIC MOLD CO Ltd
Original Assignee
SUZHOU XINLONG PLASTIC MOLD CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SUZHOU XINLONG PLASTIC MOLD CO Ltd filed Critical SUZHOU XINLONG PLASTIC MOLD CO Ltd
Priority to CN202111557240.8A priority Critical patent/CN114211691A/en
Publication of CN114211691A publication Critical patent/CN114211691A/en
Pending legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/174—Applying a pressurised fluid to the outer surface of the injected material inside the mould cavity, e.g. for preventing shrinkage marks
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1734—Nozzles therefor
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2602—Mould construction elements
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/72—Heating or cooling
    • B29C45/73—Heating or cooling of the mould
    • B29C45/7312—Construction of heating or cooling fluid flow channels
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/1703—Introducing an auxiliary fluid into the mould
    • B29C45/1734—Nozzles therefor
    • B29C2045/1739—Nozzles therefor controlling the temperature or heat-transfer in fluid injection nozzles

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

The application relates to a nitrogen auxiliary forming die, relates to the technical field of blowing auxiliary forming, and aims to solve the problem that a workpiece is easy to condense in advance without being completely formed due to low nitrogen temperature; the side wall of the lower die holder is provided with a mounting opening, a heating device is arranged in the mounting opening, the heating device comprises a mounting column inserted in the mounting opening, the side wall of the mounting column is provided with an air inlet hole, and the air inlet hole further penetrates through the lower die holder and is communicated with the die cavity; the annular has been seted up to the erection column lateral wall, be provided with the heating wire in the annular, still be provided with the heater on the lateral wall of erection column, the heater is connected with the heating wire electricity. The application has the effect of reducing the condition of the part condensing in advance.

Description

Nitrogen auxiliary forming die
Technical Field
The application relates to the technical field of auxiliary forming by blowing, in particular to a nitrogen auxiliary forming die.
Background
The nitrogen-assisted molding is an assisted molding process in an injection molding process, and aims at large and complex products with uneven wall thickness, high-pressure nitrogen is filled in plastic through air holes during injection molding of a mold so as to extrude excessive plastic at a position with large wall thickness in the mold, and the product with proper wall thickness is obtained.
A related patent with the publication number of CN209971438U provides a nitrogen-assisted molding injection molding device, which comprises an injection molding device frame body, wherein a mold base is arranged on the injection molding device frame body, and a nitrogen needle is arranged in the mold base; an air outlet channel is arranged in the nitrogen needle in a penetrating manner, a main air channel and a branch air channel which are communicated with each other are arranged in the injection molding device frame body, the main air channel is communicated with the side wall of the injection molding device frame body, and the branch air channel is communicated with the air outlet channel. During injection molding, nitrogen is injected into the main air channel, and enters the die cavity of the die holder through the main air channel, the air distribution channel and the air inlet pipeline in sequence, so that auxiliary molding can be performed.
In view of the above related patents, the inventor believes that nitrogen has a low temperature and cools a workpiece after being injected into a mold cavity and contacting the workpiece, so that the phenomenon of early condensation of the workpiece before complete molding is likely to occur, and the quality of the finished product of the workpiece is not qualified.
Disclosure of Invention
In order to reduce the condition that the finished piece condenses in advance, this application provides a nitrogen gas assists forming die.
The application provides a supplementary forming die of nitrogen gas adopts following technical scheme:
the nitrogen auxiliary forming die comprises a lower die holder, wherein a die cavity is formed in the lower die holder; the side wall of the lower die holder is provided with a mounting opening, a heating device is arranged in the mounting opening, the heating device comprises a mounting column inserted in the mounting opening, the side wall of the mounting column is provided with an air inlet hole, and the air inlet hole further penetrates through the lower die holder and is communicated with the die cavity; the annular has been seted up to the erection column lateral wall, be provided with the heating wire in the annular, still be provided with the heater on the end wall of erection column, the heater is connected with the heating wire electricity.
By adopting the technical scheme, the lower die holder and the upper die holder are matched and injected with molten plastic for injection molding, when the molten plastic is solidified but the temperature is not reduced, the heater is started to heat the electric heating wire, the electric heating wire heats the air inlet hole further to raise the internal temperature of the air inlet hole, then nitrogen is introduced into the air inlet hole, the nitrogen is heated and heated in the high-temperature environment of the air inlet hole, and then the nitrogen further enters the die cavity to perform the auxiliary molding process. After the nitrogen contacts with the workpiece, the temperature of the nitrogen is heated, so that the condition that the nitrogen cools the workpiece is reduced, and the condition that the workpiece is not completely molded but is condensed in advance is reduced.
Preferably, the annular groove is provided with a spiral groove along the length direction of the mounting column, and the heating wire is spirally inserted into the annular groove.
Generally, in order to increase the heating range, a plurality of ring grooves are formed, and a plurality of heating wires are installed, so that the operation is complicated; by adopting the technical scheme, the spiral arrangement of the annular groove enables the chute to be in place in one step during processing, and meanwhile, the heating wire with enough length is selected to be wound on the bottom wall of the annular groove, so that the convenience of arranging the annular groove and installing the heating wire is improved.
Preferably, the outer side wall of the mounting column is provided with a stepped groove, and the ring groove is positioned on the bottom wall of the stepped groove; be provided with the installation pole between two relative inside walls of ladder groove, installation pole both sides are all rotated and are connected with the arc, two the end wall that installation pole one end was kept away from to the arc pastes mutually.
After the mounting column with the heating wire is directly inserted into the mounting opening, the temperature of the heating wire heated by the heater is higher, and the heating wire is easy to influence the inner side wall of the mounting opening, so that the temperature of the lower die holder is influenced, and the condensation time of a workpiece is easy to prolong; through adopting above-mentioned technical scheme, before the erection column inserted the installing port, rotate two arcs, make the arc detain from the erection column both sides and establish on the ladder groove diapire to completely cut off the heating wire, separate heating wire and the interior lateral wall of erection column, reduce the influence of the high temperature electric heat silk that is heated to the interior lateral wall of erection column, reduce the heating effect of electric heat silk to the finished piece of die holder and die cavity, thereby shorten the condensation time of finished piece.
Preferably, a through hole is formed in the outer side wall of one of the arc-shaped plates, and the through hole is communicated with the end wall of the arc-shaped plate; and a connecting bolt is inserted into the through hole and is in threaded connection with the end wall of the other arc-shaped plate.
Generally, after the two arc-shaped plates are buckled on the bottom wall of the stepped groove along two sides of the mounting column, an operator needs to hold the mounting column while manually supporting the arc-shaped plates to limit the relative positions of the two arc-shaped plates, so that the operation of inserting the mounting column into the mounting opening is affected by the arc-shaped plates, and is inconvenient; by adopting the technical scheme, after the two arc-shaped plates are buckled on the bottom wall of the stepped groove, the end walls of the two arc-shaped plates far away from one end of the mounting rod are attached to each other, then the nut is moved to penetrate through the through hole, and simultaneously the nut is screwed to enable the nut to further penetrate through the end walls of the arc-shaped plates without the through hole and be in threaded connection with the end walls; the bolt and the setting through, make two arcs detain and establish back on the ladder groove diapire, the relative position of two arcs obtains the restriction to when removing the erection column and inserting the installing port, reduced the condition that operating personnel need manually support the arc, improved the simple operation nature that the erection column inserted the installing port.
Preferably, a connecting nut which is connected with the connecting bolt in a matched mode is embedded in the end wall of the arc-shaped plate which is not provided with the through hole.
Generally, when a bolt is in threaded connection with an end wall of an arc-shaped plate which is not provided with a through hole, a threaded hole needs to be formed in the end wall of the arc-shaped plate, the wall of the arc-shaped plate is thin, and the wall of the arc-shaped plate is easy to break when the threaded hole is formed; through adopting above-mentioned technical scheme, when prefabricating the arc that does not set up the through-hole, with the nut embedding in the end wall of this arc, when the bolt is connected with this arc, directly with nut threaded connection can to reduced the condition of seting up the screw hole on the arc, reduced the arc plate wall because of seting up the cracked condition of screw hole.
Preferably, the air inlet holes are formed in the mounting column in a wave shape.
Generally, the air holes are linear holes in the mounting column, the speed of nitrogen passing through the air holes is high, the heating wire is difficult to heat the nitrogen to a proper temperature, and the nitrogen is easy to enter the mold cavity in a low-temperature state; through adopting above-mentioned technical scheme, the wave setting of inlet port has increased the length of gas pocket in the erection column to increased the flow stroke of nitrogen gas in the erection column, increased the retention time that nitrogen gas exists in the erection column, increased the heating time of electric heat silk to nitrogen gas, reduced the condition that nitrogen gas still gets into the die cavity with lower temperature state.
Preferably, the inner side wall of the mounting port is provided with a positioning groove, the outer side wall of the mounting column is provided with a positioning block, and the positioning block is inserted into the positioning groove.
Generally, the mounting column is cylindrical, the mounting opening is a cylindrical opening matched with the mounting column, and after the mounting column is inserted into the mounting opening, the mounting column is easy to deflect under the action of external force, so that the positions of an air hole in the mounting column and an air hole in the lower die seat are staggered; through adopting above-mentioned technical scheme, when the erection column inserted the installing port, the erection column drove the locating piece to insert the constant head tank, and the constant head tank inside wall can be fixed a position the locating piece to the position location of erection column, reduce the erection column and insert the back in the mounting groove, take place the effect of external force and rotate in business, lead to the gas pocket on the erection column and the staggered condition in gas pocket position on the die holder.
Preferably, the side wall of the lower die base is provided with an exhaust hole, the exhaust hole further penetrates through the lower die base to be communicated with the die cavity, and a sealing block is inserted into the exhaust hole.
In general, nitrogen is discharged from the lower die base through the original path of the air inlet hole, and the nitrogen filled into the die cavity has high temperature and is easy to react with high-temperature plastics, so that the purity of the nitrogen is reduced; returning along the original path of the air inlet hole and being easy to discharge into the original nitrogen source, so that the purity of nitrogen in the nitrogen source is reduced; through adopting above-mentioned technical scheme, when filling nitrogen gas, with sealed piece threaded connection in the exhaust port, realize the sealed to the die cavity, after nitrogen gas accomplishes the auxiliary forming to the finished piece, can take out sealed piece in the exhaust port, make nitrogen gas discharge in the exhaust port, reduce nitrogen gas and return to nitrogen gas source department along the air inlet original road, lead to the condition that nitrogen gas purity descends in the nitrogen gas source.
Preferably, an annular condenser is embedded in the side wall of the lower die holder, and the annular condenser is coaxial with the exhaust hole.
The nitrogen is heated by the electric heating wire when entering the die cavity, so that the temperature of the nitrogen is still high when the nitrogen is discharged from the exhaust hole, and the nitrogen is easy to react with oxygen in the air to generate oxynitride after entering the air, thereby causing harm to the health of nearby operators; by adopting the technical scheme, before the nitrogen is discharged out of the lower die holder through the vent hole, the annular condenser is started to cool the vent hole, and then the sealing block is taken out of the vent hole, so that the nitrogen enters the vent hole to be cooled, the temperature of the nitrogen discharged out of the lower die holder and entering air is reduced, and the condition that the nitrogen reacts with oxygen in the air to generate oxynitride caused by high temperature of the nitrogen is reduced; the annular condenser and the exhaust holes are coaxially arranged, so that the exhaust holes can be uniformly cooled.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the installation columns, the electric heating wires and the heaters are arranged, and the installation ports and the annular grooves are arranged, so that when nitrogen is introduced into the air inlet holes, the nitrogen can be heated and heated in the high-temperature environment of the air inlet holes heated by the electric heating wires, and then further enters the mold cavity to carry out an auxiliary molding process; after the nitrogen contacts with the workpiece, the temperature of the nitrogen is heated, so that the condition that the nitrogen cools the workpiece is reduced, and the condition that the workpiece is not completely molded but is condensed in advance is reduced.
2. The two arc-shaped plates can separate the electric heating wires from the inner side wall of the mounting port, so that the influence of the heated high-temperature electric heating wires on the inner side wall of the mounting port is reduced, the heating effect of the electric heating wires on the lower die holder and the workpieces in the die cavity is reduced, and the condensation time of the workpieces is shortened.
3. The wave-shaped arrangement of the air inlet hole increases the length of the air hole in the mounting column, thereby increasing the flow stroke of nitrogen in the mounting column, increasing the retention time of nitrogen in the mounting column, increasing the heating time of the electric heating wire to the nitrogen, and reducing the condition that the nitrogen still enters the die cavity in a lower temperature state.
Drawings
Fig. 1 is a schematic structural diagram of a nitrogen-assisted forming die in an embodiment of the present application.
FIG. 2 is a schematic cross-sectional view illustrating the positional relationship between the heating wire and the ring groove in the embodiment of the present application.
Fig. 3 is an exploded schematic view for showing the positional relationship between the connecting bolt and the through hole in the embodiment of the present application.
Description of reference numerals: 1. a lower die holder; 11. a mold cavity; 12. an installation port; 121. positioning a groove; 13. an annular condenser; 2. mounting a column; 21. an air inlet; 22. a ring groove; 23. a stepped groove; 231. mounting a rod; 24. an electric heating wire; 25. a heater; 26. positioning blocks; 27. an exhaust hole; 271. a sealing block; 3. an arc-shaped plate; 31. a through hole; 32. a connecting bolt; 33. and linking the nuts.
Detailed Description
The present application is described in further detail below with reference to figures 1-3.
The embodiment of the application discloses nitrogen gas auxiliary forming die. Referring to fig. 1 and 2, the nitrogen auxiliary forming die comprises a lower die holder 1, and a die cavity 11 is formed in the top wall of the lower die holder 1; the side wall of the lower die holder 1 is provided with a mounting opening 12, a heating device is arranged in the mounting opening 12, the heating device comprises a mounting column 2, and the mounting column 2 is inserted into the mounting opening 12; an air inlet 21 is formed in the end wall of the mounting column 2, the air inlet 21 is wavy in the mounting column 2, and one end of the air inlet 21 penetrates through the lower die base 1 and is communicated with the die cavity 11; an annular groove 22 is formed in the side wall of the mounting column 2, the annular groove 22 is a spiral groove along the length direction of the mounting column 2, and a heating wire 24 is inserted into the annular groove 22 along the length direction of the annular groove 22.
Referring to fig. 1 and 2, a heater 25 is screwed to an end wall of the mounting post 2, and a heating wire 24 is electrically connected to the heater 25 through the mounting post 2. When the auxiliary forming die is used, the lower die holder 1 and the upper die holder are matched and molten plastic is injected, when the molten plastic is solidified but the temperature is not reduced, the heater 25 is started to heat the electric heating wire 24, the electric heating wire 24 further heats the air inlet hole 21 to increase the internal temperature, then nitrogen is introduced into the air inlet hole 21, the nitrogen is heated and heated in the high-temperature environment of the air inlet hole 21, and then the nitrogen further enters the die cavity 11 to carry out the auxiliary forming process; after the nitrogen contacts with the workpiece, the temperature of the nitrogen is heated, so that the condition that the nitrogen cools the workpiece is reduced, and the condition that the workpiece is not completely molded but is condensed in advance is reduced.
Referring to fig. 1, a vent hole 27 is formed in the side wall of one side of the lower die holder 1, one end of the vent hole 27 further penetrates through the lower die holder 1 to be communicated with the die cavity 11, a sealing block 271 is inserted into the vent hole 27, and the sealing block 271 is in threaded connection with the inner side wall of the vent hole 27; the side wall of the lower die holder 1 is embedded with an annular condenser 13, and the annular condenser 13 is coaxial with the exhaust hole 27. After the auxiliary forming of the nitrogen is finished, the sealing block 271 is taken out from the exhaust hole 27, the nitrogen is exhausted out of the die cavity 11 through the exhaust hole 27 and is cooled by the annular condenser 13, and the condition that nitrogen oxide is generated due to high temperature and oxygen in the air after the nitrogen is exhausted is reduced.
Referring to fig. 2 and 3, a stepped groove 23 is formed in the outer side wall of the mounting column 2, a mounting rod 231 is arranged between two opposite inner side walls of the stepped groove 23, one end of the mounting rod 231 is welded to the inner side wall of one side of the stepped groove 23, and the other end of the mounting rod 231 is welded to the inner side wall of the other side of the stepped groove 23; the two sides of the mounting rod 231 are rotatably connected with arc-shaped plates 3 through hinges, and the two arc-shaped plates 3 are buckled on the bottom wall of the stepped groove 23; a through hole 31 is formed in the outer side wall of one of the arc-shaped plates 3, the through hole 31 is communicated with the end wall of the arc-shaped plate 3, a connecting nut is embedded in the end wall of the other arc-shaped plate 3, a connecting bolt 32 is inserted into the through hole 31, and one end of the connecting bolt 32 can penetrate through the through hole 31 to be in threaded connection with the connecting nut.
Referring to fig. 1 and 2, a positioning groove 121 is formed in the inner side wall of the mounting opening 12, and a positioning block 26 is arranged on the outer side wall of the mounting column 2; when the mounting column 2 is inserted into the mounting opening 12, the positioning block 26 is inserted into the positioning groove 121 to position the mounting column 2, so that the rotation of the mounting column 2 is reduced, and the air inlet 21 of the mounting column 2 and the air inlet 21 of the lower die holder 1 are staggered.
The implementation principle of the nitrogen auxiliary forming die in the embodiment of the application is as follows:
before introducing nitrogen, a heater 25 is started to heat the electric heating wire 24, the electric heating wire 24 further heats the air inlet 21 to raise the internal temperature, then the nitrogen is introduced into the air inlet 21, the nitrogen is heated and raised in the high-temperature environment of the air inlet 21, and then the nitrogen further enters the mold cavity 11 to carry out an auxiliary molding process; after the nitrogen gas is subjected to auxiliary forming, the sealing block 271 is taken out of the exhaust hole 27, and the nitrogen gas is exhausted out of the mold cavity 11 through the exhaust hole 27 and is cooled by the annular condenser 13. After the nitrogen contacts with the workpiece, the temperature of the nitrogen is heated, so that the condition that the nitrogen cools the workpiece is reduced, and the condition that the workpiece is not completely molded but is condensed in advance is reduced.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (9)

1. A nitrogen auxiliary forming die comprises a lower die holder (1), wherein a die cavity (11) is formed in the lower die holder (1); the method is characterized in that: the side wall of the lower die holder (1) is provided with a mounting opening (12), a heating device is arranged in the mounting opening (12), the heating device comprises a mounting column (2) inserted into the mounting opening (12), the side wall of the mounting column (2) is provided with an air inlet hole (21), and the air inlet hole (21) further penetrates through the lower die holder (1) and is communicated with the die cavity (11); annular groove (22) have been seted up to erection column (2) lateral wall, be provided with heating wire (24) in annular groove (22), still be provided with heater (25) on the end wall of erection column (2), heater (25) are connected with heating wire (24) electricity.
2. The nitrogen-assisted molding die of claim 1, wherein: annular groove (22) set up to the heliciform groove along erection column (2) length direction, heating wire (24) are the heliciform and insert in annular groove (22).
3. The nitrogen-assisted molding die of claim 1, wherein: the outer side wall of the mounting column (2) is provided with a stepped groove (23), and the annular groove (22) is positioned on the bottom wall of the stepped groove (23); be provided with between two relative inside walls of ladder groove (23) installation pole (231), installation pole (231) both sides are all rotated and are connected with arc (3), two the end wall that installation pole (231) one end was kept away from in arc (3) pastes mutually.
4. A nitrogen-assist molding die as claimed in claim 3, wherein: the outer side wall of one of the arc-shaped plates (3) is provided with a through hole (31), and the through hole (31) is communicated with the end wall of the arc-shaped plate (3); a connecting bolt (32) is inserted into the through hole (31), and the connecting bolt (32) is in threaded connection with the end wall of the other arc-shaped plate (3).
5. The nitrogen-assisted molding die of claim 4, wherein: and a connecting nut which is matched and connected with the connecting bolt (32) is embedded in the end wall of the arc-shaped plate (3) which is not provided with the through hole (31).
6. The nitrogen-assisted molding die of claim 1, wherein: the air inlet holes (21) are arranged in the mounting column (2) in a wave shape.
7. The nitrogen-assisted molding die of claim 1, wherein: a positioning groove (121) is formed in the inner side wall of the mounting opening (12), a positioning block (26) is arranged on the outer side wall of the mounting column (2), and the positioning block (26) is inserted into the positioning groove (121).
8. The nitrogen-assisted molding die of claim 1, wherein: exhaust hole (27) have been seted up to lower bolster (1) lateral wall, exhaust hole (27) further run through lower bolster (1) and die cavity (11) intercommunication, sealed piece (271) have been inserted in exhaust hole (27).
9. The nitrogen-assisted molding die of claim 8, wherein: the side wall of the lower die holder (1) is embedded with an annular condenser (13), and the annular condenser (13) is coaxial with the exhaust hole (27).
CN202111557240.8A 2021-12-18 2021-12-18 Nitrogen auxiliary forming die Pending CN114211691A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111557240.8A CN114211691A (en) 2021-12-18 2021-12-18 Nitrogen auxiliary forming die

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111557240.8A CN114211691A (en) 2021-12-18 2021-12-18 Nitrogen auxiliary forming die

Publications (1)

Publication Number Publication Date
CN114211691A true CN114211691A (en) 2022-03-22

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ID=80704019

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111557240.8A Pending CN114211691A (en) 2021-12-18 2021-12-18 Nitrogen auxiliary forming die

Country Status (1)

Country Link
CN (1) CN114211691A (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5044924A (en) * 1990-06-08 1991-09-03 Loren Norman S Gas assisted injection molding apparatus
JPH06246765A (en) * 1993-02-24 1994-09-06 Idemitsu Petrochem Co Ltd Gas injection molding method and mold thereof
JPH08244072A (en) * 1995-03-10 1996-09-24 Sekisui Chem Co Ltd Injection mold and molding method
CN1197706A (en) * 1997-03-12 1998-11-04 日本碍子株式会社 Chill vent
JP2002172655A (en) * 2000-12-05 2002-06-18 Taiyo Manufacturing Co Ltd Injection mold for thermoplastic resin
KR20020048830A (en) * 2000-12-18 2002-06-24 김영조 The gas assisted injection molding method and the same apparatus and its mold
CN209971438U (en) * 2019-03-08 2020-01-21 武汉湘伟模塑有限公司 Nitrogen gas auxiliary forming injection molding device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5044924A (en) * 1990-06-08 1991-09-03 Loren Norman S Gas assisted injection molding apparatus
JPH06246765A (en) * 1993-02-24 1994-09-06 Idemitsu Petrochem Co Ltd Gas injection molding method and mold thereof
JPH08244072A (en) * 1995-03-10 1996-09-24 Sekisui Chem Co Ltd Injection mold and molding method
CN1197706A (en) * 1997-03-12 1998-11-04 日本碍子株式会社 Chill vent
JP2002172655A (en) * 2000-12-05 2002-06-18 Taiyo Manufacturing Co Ltd Injection mold for thermoplastic resin
KR20020048830A (en) * 2000-12-18 2002-06-24 김영조 The gas assisted injection molding method and the same apparatus and its mold
CN209971438U (en) * 2019-03-08 2020-01-21 武汉湘伟模塑有限公司 Nitrogen gas auxiliary forming injection molding device

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