CN114619626A - Injection molding process - Google Patents

Injection molding process Download PDF

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Publication number
CN114619626A
CN114619626A CN202210224968.7A CN202210224968A CN114619626A CN 114619626 A CN114619626 A CN 114619626A CN 202210224968 A CN202210224968 A CN 202210224968A CN 114619626 A CN114619626 A CN 114619626A
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CN
China
Prior art keywords
pipe
heating cylinder
injection molding
molding process
frame
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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.)
Withdrawn
Application number
CN202210224968.7A
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Chinese (zh)
Inventor
邵帅
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.)
Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN202210224968.7A priority Critical patent/CN114619626A/en
Publication of CN114619626A publication Critical patent/CN114619626A/en
Withdrawn legal-status Critical Current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
    • B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
    • 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
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/47—Means for plasticising or homogenising the moulding material or forcing it into the mould using screws
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/60—Screws
    • 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
    • B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
    • B29C45/58—Details
    • B29C45/62—Barrels or cylinders
    • 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
    • B29C45/74—Heating or cooling of the injection unit
    • 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
    • B29C45/18—Feeding the material into the injection moulding apparatus, i.e. feeding the non-plastified material into the injection unit
    • B29C2045/1875—Hoppers connected to a feed screw

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention relates to the field of plastic injection molding, in particular to an injection molding process, which improves the filling efficiency by using an injection device; the process comprises the following steps: s1, uniformly mixing the raw materials, and drying the materials by using an oven; s2, adding the raw materials processed in the step S1 into an injection device, and heating the raw materials to a molten state; s3, injecting the raw material in a molten state into a mould through an injection device; s4, opening the die to take out the product after the raw materials in the die are cooled and formed; the injection device comprises a heating cylinder with an injection head at the front end, a support frame is arranged at the lower end of the heating cylinder, a feeding pipe is arranged above the heating cylinder, a piston pipe slides in the heating cylinder, a transmission pipe rotates in the piston pipe, a spiral plate I is fixed on the transmission pipe, a limiting pipe is arranged at the front part of the heating cylinder, and an extrusion block slides in the limiting pipe.

Description

Injection molding process
Technical Field
The invention relates to the field of plastic injection molding, in particular to an injection molding process.
Background
Many plastic products are made by injection molding processes, which refer to: a process of manufacturing a semi-finished product piece with a certain shape by pressurizing, injecting, cooling, separating and the like the molten raw materials; it is mainly divided into the stages of mold closing, filling, pressure maintaining, cooling, mold opening, demolding and the like.
The filling stage is a process of injecting molten raw materials into a mold cavity, and the time for filling the mold cavity in the process has an important relation with the product molding efficiency, but the existing injection molding equipment has low filling efficiency and influences the use.
Disclosure of Invention
The object of the present invention is to provide an injection molding process that improves the filling efficiency by using an injection device.
The purpose of the invention is realized by the following technical scheme:
an injection molding process, comprising the steps of:
s1, uniformly mixing the raw materials, and drying the materials by using an oven;
s2, adding the raw materials processed in the step S1 into an injection device, and heating the raw materials to a molten state;
s3, injecting the raw material in a molten state into a mould through an injection device;
and S4, opening the die to take out the product after the raw materials in the die are cooled and formed.
The material drying time is 2-3 hours.
The step S2 is to heat the raw material and heat the mold for pretreatment.
The injection device comprises a heating cylinder with an injection head at the front end, a support frame is arranged at the lower end of the heating cylinder, a feeding pipe is arranged above the heating cylinder, a piston pipe slides in the heating cylinder, a transmission pipe rotates in the piston pipe, a spiral plate I is fixed on the transmission pipe, a limiting pipe is arranged at the front part of the heating cylinder, and an extrusion block slides in the limiting pipe.
Drawings
FIG. 1 is a schematic flow diagram of an injection molding process;
figures 2 and 3 are schematic structural views of the injection device;
FIG. 4 is a schematic view of a heating cartridge;
FIG. 5 is a schematic view of an example of stirring while heating the raw material;
FIG. 6 is a schematic structural diagram of the connection of the piston tube, the transmission tube and the spiral plate I;
FIG. 7 is a schematic structural view of a spiral plate II;
FIG. 8 is a schematic view of the structure of the arc plate;
FIG. 9 is a schematic view of the construction of the extrusion block;
FIG. 10 is a schematic view of the structure of the core block;
FIG. 11 is a schematic view of the construction of the toggle ring;
fig. 12 is a schematic view of the construction of the stirring rod.
In the figure:
a heating cylinder 101; an injection head 102; a feed tube 103; a support frame 104; a limiting tube 105; a stop frame 106;
a piston tube 201; a drive tube 202; a spiral plate I203; a tightening frame 204; a screw 205; a wave plate 206;
a stirring shaft 301; a spiral plate II 302; a piston block 303;
an arc plate 401; a ram 402;
a squeezing block 501; a core block 501 a; an outer cover 501 b; a secondary spring 501 c; a rack 502; a spring I503; a drive wheel 504; a rack I505;
a dial ring 601; an outer ring carrier 602; a spring III 603;
a rotating disk 701; a stirring rod 702; and a rack II 703.
Detailed Description
As shown in fig. 1:
an injection molding process, comprising the steps of:
s1, uniformly mixing the raw materials, and drying the materials by using an oven;
s2, adding the raw materials processed in the step S1 into an injection device, and heating the raw materials to a molten state;
s3, injecting the raw material in a molten state into a mould through an injection device;
and S4, opening the die to take out the product after the raw materials in the die are cooled and formed.
The material drying time is 3 hours.
The step S2 is to heat the raw material and heat the mold for pretreatment.
As shown in fig. 2-12:
the injection device comprises a heating cylinder 101, an injection head 102, a feeding pipe 103, a supporting frame 104, a limiting pipe 105, a piston pipe 201, a transmission pipe 202, a spiral plate I203 and an extrusion block 501; the front end of the heating cylinder 101 is provided with an injection head 102, a support frame 104 is fixed at the lower end of the heating cylinder 101, a feeding pipe 103 is fixed above the heating cylinder 101, a piston pipe 201 slides in the heating cylinder 101, a driving pipe 202 rotates in the piston pipe 201, a spiral plate I203 is fixed on the driving pipe 202, a limiting pipe 105 is arranged at the front part of the heating cylinder 101, and an extrusion block 501 slides in the limiting pipe 105.
When the injection device is used, dried raw materials are added into the feeding pipe 103, the first motor arranged on the piston pipe 201 is started to drive the transmission pipe 202, the transmission pipe 202 drives the spiral plate I203 to rotate, so that the raw materials entering the heating cylinder 101 are conveyed forwards, meanwhile, the raw materials in the heating cylinder 101 are heated, after the raw materials are heated to a molten state, the telescopic rod arranged on the supporting frame 104 is started, the piston pipe 201 is pushed to move forwards through the telescopic rod, so that the raw materials in the molten state are extruded into a mold connected with the injection head 102 through the injection head for filling;
in order to rapidly fill the die with the raw materials in a molten state, the piston pipe 201 moves forwards to extrude, meanwhile, the extrusion block 501 is pushed inwards, the extrusion block 501 slides into the heating cylinder 101, the piston pipe 201 is assisted to extrude, and the filling efficiency is improved;
when the raw material is heated by the heating cylinder 101, the rotation of the spiral plate I203 is maintained, so that the raw material in the heating cylinder 101 is stirred, and the heating efficiency of the heating cylinder 101 on the raw material is improved.
Further:
the number of the limiting pipes 105 is three, and the three limiting pipes 105 are internally provided with extrusion blocks 501 in a sliding manner.
Through the setting of three extrusion piece 501, when extrusion injection, promote three extrusion piece 501 simultaneously and slide in heating cylinder 101, increase the volume of extruding into heating cylinder 101, further supplementary piston tube 201 extrudees, improves packing efficiency.
As shown in fig. 2-12:
the stirring shaft 301 rotates on the support frame 104, the piston block 303 is fixed in the middle of the stirring shaft 301, the spiral plate II 302 is fixed at the front end of the stirring shaft 301, and the piston block 303 slides in the transmission pipe 202.
In order to provide a sliding space for the extrusion block 501, the spiral plate I203 cannot reach the position of the extrusion block 501, so that the raw material at the position of the extrusion block 501 cannot be stirred by the rotating spiral plate I203, and the heating efficiency is low;
the stirring shaft 301 is arranged, and during heating, a second motor arranged on the support frame 104 is started to drive the stirring shaft 301, so that the stirring shaft 301 drives the spiral plate II 302 to rotate, the raw materials in the space where the extrusion block 501 is located are stirred, and the heating efficiency of the space is ensured; the extrusion activity of the extrusion block 501 is not influenced;
by the piston block 303 sliding within the drive tube 202, a seal is formed to the drive tube 202 without affecting the movement of the drive tube 202 with the piston tube 201.
As shown in fig. 2-12:
a spring i 503 is disposed between the pressing block 501 and the heating cylinder 101.
Through the elasticity of the spring I503 and the limitation of the limiting pipe 105 on the extrusion block 501, the extrusion block 501 is kept on the outer side of the limiting pipe 105, the inner end of the extrusion block 501 is matched with the inner wall of the heating cylinder 101, the extrusion block 501 is ensured to slide into the heating cylinder 101 to extrude the raw material, and the deeper the sliding depth is, the larger the extrusion degree is.
As shown in fig. 2-12:
the limiting frame 106 is fixed behind the limiting tube 105, the transmission wheel 504 rotates on the limiting frame 106, the rack I505 slides on the limiting frame 106 and is in meshed transmission with the transmission wheel 504, the rack frame 502 is fixed on the extrusion block 501 and is in meshed transmission connection with the transmission wheel 504, and the tightening frame 204 is fixed at the rear end of the piston tube 201.
When the piston tube 201 is pushed by the telescopic rod to move forwards to extrude raw materials, the piston tube 201 extrudes the rack I505 through the jacking frame 204, the rack I505 moves forwards to drive the transmission wheel 504 to rotate, the transmission wheel 504 drives the rack frame 502 to move downwards, and then the extrusion block 501 is driven to slide towards the heating cylinder 101 to assist in extruding the piston tube 201;
when the telescopic rod drives the piston tube 201 to move backwards, the rack I505 loses the extrusion of the tightening frame 204, and the elastic force of the spring I503 automatically pushes the extrusion block 501 to slide out of the heating cylinder 101 to the original position;
thereby forming synchronous extrusion of the piston tube 201 and the extrusion block 501, and ensuring the extrusion efficiency.
As shown in fig. 2-12:
the arc plate 401 slides on the tightening frame 204, the three push rods 402 are fixed on the arc plate 401, the three push rods 402 respectively correspond to the three racks I505, and the screw 205 rotates on the tightening frame 204 and is in threaded connection with the arc plate 401.
Through the arrangement of the arc plate 401 and the ejector rods 402, when the piston tube 201 moves forwards, the piston tube 201 drives the arc plate 401 through the tightening frame 204, so that the three ejector rods 402 simultaneously tighten the three racks I505 to move;
through rotating screw 205, adjust the position of arc board 401 to adjust the position of ejector pin 402, thereby when control piston tube 201 moved to where position, ejector pin 402 contacted with rack I505 again, thereby reached the purpose of the supplementary extrusion degree of control.
As shown in fig. 2-12:
the extrusion block 501 comprises a core block 501a, an outer sleeve 501b and a second-level spring 501c, the core block 501a is arranged in the outer sleeve 501b in a sliding mode, the outer sleeve 501b is arranged in the limiting pipe 105 in a sliding mode, a spring I503 is arranged between the outer sleeve 501b and the heating cylinder 101, the second-level spring 501c is arranged between the core block 501a and the outer sleeve 501b, and the core block 501a is fixedly connected with the rack 502.
When the rack frame 502 is driven by the driving wheel 504 to move downwards, the rack frame 502 drives the core block 501a to move downwards, the core block 501a drives the outer sleeve 501b to overcome the elasticity of the spring I503 through the secondary spring 501c and move towards the heating cylinder 101, after the outer sleeve 501b slides for positioning and moving, the core block 501a continuously extrudes the secondary spring 501c to slide out of the outer sleeve 501b and continuously move towards the heating cylinder 101, so that the volume of the whole extrusion block 501 sliding into the heating cylinder 101 is increased, and the extrusion efficiency is improved;
when the extrusion is lost, the elastic forces of the spring I503 and the secondary spring 501c act simultaneously, so that the core block 501a slides into the outer sleeve 501b, and the outer sleeve 501b slides out of the heating cylinder 101 to the initial position.
As shown in fig. 2-12:
a rotary turntable 701 is rotated in the feeding pipe 103, a plurality of stirring rods 702 are fixed on the rotary turntable 701, a rack II 703 slides transversely on the feeding pipe 103, and the rear end of the rack II 703 is fixedly connected with the tightening frame 204.
When the piston pipe 201 is controlled to move back and forth through the telescopic rod, the piston pipe 201 drives the rack II 703 to reciprocate in the feed pipe 103 through the tightening frame 204, namely, the transmission to the rotating disc 701 is formed, so that the rotating disc 701 drives the stirring rod 702 to reciprocate in the feed pipe 103, the stirring of the raw materials in the feed pipe 103 is formed, and the raw materials are prevented from being detained in the feed pipe 103 and influencing the flowing of the raw materials into the heating cylinder 101.
As shown in fig. 2-12:
a toggle ring 601 is arranged in the charging pipe 103 in a lifting sliding manner, an outer ring frame 602 is arranged outside the charging pipe 103 in a sliding manner, the outer ring frame 602 is fixedly connected with the toggle ring 601, a spring III 603 is arranged between the outer ring frame 602 and the heating cylinder 101, two wave plates 206 are fixed on the tightening frame 204, and the outer ring frame 602 tightly pushes the two wave plates 206.
When the piston tube 201 is controlled to move back and forth by the telescopic rod, the piston tube 201 drives the two wave plates 206 to move back and forth through the tightening frame 204, the two wave plates 206 are matched with each other through the wave edges on the wave plates and the elastic force of the spring III 603 to extrude the outer ring frame 602, so that the outer ring frame 602 drives the stirring ring 601 to lift up and down in the charging tube 103 in a reciprocating manner, the raw materials in the charging tube 103 are pushed downwards, and the raw materials are further prevented from being retained in the charging tube 103 and influencing the flow of the raw materials into the heating cylinder 101;
and the efficiency of the raw material flowing into the heating cylinder 101 is further improved by the matching of the stirring rod 702 and the stirring ring 601.

Claims (10)

1. An injection molding process, which is characterized in that: the process comprises the following steps:
s1, uniformly mixing the raw materials, and drying the materials by using an oven;
s2, adding the raw materials processed in the step S1 into an injection device, and heating the raw materials to a molten state;
s3, injecting the raw material in a molten state into a mould through an injection device;
and S4, opening the die to take out the product after the raw materials in the die are cooled and formed.
2. An injection molding process according to claim 1, wherein: the material drying time is 2-3 hours.
3. An injection molding process according to claim 2, wherein: in step S2, the raw material is heated and the mold is pre-heated.
4. An injection molding process according to claim 1, wherein: the injection device comprises a heating cylinder (101) with an injection head (102) at the front end, a support frame (104) is arranged at the lower end of the heating cylinder (101), a feeding pipe (103) is arranged above the heating cylinder (101), a piston pipe (201) slides in the heating cylinder (101), a transmission pipe (202) rotates in the piston pipe (201), a spiral plate I (203) is fixed on the transmission pipe (202), a limiting pipe (105) is arranged at the front part of the heating cylinder (101), and an extrusion block (501) slides in the limiting pipe (105).
5. An injection molding process according to claim 4, wherein: the number of the limiting pipes (105) is three, and the three limiting pipes (105) are internally provided with extrusion blocks (501) in a sliding mode.
6. An injection molding process according to claim 5, wherein: the stirring shaft (301) is rotated on the support frame (104), the piston block (303) is arranged in the middle of the stirring shaft (301), the spiral plate II (302) is fixed at the front end of the stirring shaft (301), and the piston block (303) slides in the transmission pipe (202).
7. An injection molding process according to claim 5, wherein: a spring I (503) is arranged between the extrusion block (501) and the heating cylinder (101).
8. An injection molding process according to claim 7, wherein: a limiting frame (106) is fixed to the rear portion of the limiting pipe (105), a transmission wheel (504) is arranged on the limiting frame (106) in a rotating mode, a rack I (505) slides on the limiting frame (106), a rack frame (502) is fixed to the extrusion block (501), the rack frame (502) is connected with the transmission wheel (504) in a meshing transmission mode, the rack I (505) is connected with the transmission wheel (504) in a meshing transmission mode, and a jacking frame (204) is fixed to the rear end of the piston pipe (201).
9. An injection molding process according to claim 8, wherein: an arc plate (401) slides on the tightening frame (204), three ejector rods (402) are fixed on the arc plate (401), the three ejector rods (402) correspond to the three racks I (505) respectively, and a screw (205) in threaded connection with the arc plate (401) rotates on the tightening frame (204).
10. An injection molding process according to claim 8, wherein: the extrusion block (501) comprises a core block (501a), an outer sleeve (501b) and a second-level spring (501c), the core block (501a) slides in the outer sleeve (501b), the outer sleeve (501b) slides in the limiting pipe (105), a spring I (503) is arranged between the outer sleeve (501b) and the heating cylinder (101), the second-level spring (501c) is arranged between the core block (501a) and the outer sleeve (501b), and the core block (501a) is fixedly connected with the rack (502).
CN202210224968.7A 2022-03-09 2022-03-09 Injection molding process Withdrawn CN114619626A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210224968.7A CN114619626A (en) 2022-03-09 2022-03-09 Injection molding process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210224968.7A CN114619626A (en) 2022-03-09 2022-03-09 Injection molding process

Publications (1)

Publication Number Publication Date
CN114619626A true CN114619626A (en) 2022-06-14

Family

ID=81900335

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210224968.7A Withdrawn CN114619626A (en) 2022-03-09 2022-03-09 Injection molding process

Country Status (1)

Country Link
CN (1) CN114619626A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115416206A (en) * 2022-08-27 2022-12-02 沈丽雯 Healthy and environment-friendly plastic and preparation method thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115416206A (en) * 2022-08-27 2022-12-02 沈丽雯 Healthy and environment-friendly plastic and preparation method thereof

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Application publication date: 20220614