CN110900976B - Runner-free injection molding structure - Google Patents
Runner-free injection molding structure Download PDFInfo
- Publication number
- CN110900976B CN110900976B CN201911338125.4A CN201911338125A CN110900976B CN 110900976 B CN110900976 B CN 110900976B CN 201911338125 A CN201911338125 A CN 201911338125A CN 110900976 B CN110900976 B CN 110900976B
- Authority
- CN
- China
- Prior art keywords
- upper die
- injection molding
- cavity
- mounting seat
- nozzle
- 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.)
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Links
- 238000001746 injection moulding Methods 0.000 title claims abstract description 59
- 238000002347 injection Methods 0.000 claims abstract description 35
- 239000007924 injection Substances 0.000 claims abstract description 35
- 238000000465 moulding Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000004033 plastic Substances 0.000 abstract description 9
- 229920003023 plastic Polymers 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 210000001503 joint Anatomy 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- 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
-
- 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
- B29C45/76—Measuring, controlling or regulating
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a runner-free injection molding structure which comprises a lower die, an upper die and an injection molding barrel, wherein a cavity for molding a product is arranged between the lower die and the upper die, a nozzle is arranged on the injection molding barrel, and a discharge hole on the nozzle is directly communicated with the cavity during injection molding. According to the invention, by arranging the runner-free injection molding structure, the injection nozzle can directly inject plastic into the cavity of the mold, so that the generation of a water gap material is avoided, resources are saved, the production cost of enterprises is reduced, the impact of an upper mold on a lower mold can be slowed down during mold closing, and the damage of the upper mold and the lower mold caused by overlarge impact is avoided; the position of the injection nozzle can be adjusted, so that the attaching precision of the injection nozzle and the cavity is adjusted, the product forming quality is improved, and the stability and accuracy of the butt joint of the injection nozzle and the cavity can be improved.
Description
Technical Field
The invention relates to the technical field of injection molding machines, in particular to a runner-free injection molding structure.
Background
Injection molding machine, also called injection molding machine or injection machine, is a molding device for molding thermoplastic plastics or thermosetting plastics into plastic products of various shapes by using a plastic molding die, and is mainly divided into vertical type and horizontal type, and when injection molding products, molten plastics are injected into a cavity of the die from a discharge port of a nozzle through a plastic injection cylinder. However, the existing injection molding structure is generally provided with a runner on a mold or a hot runner is additionally arranged on the basis of the runner, plastic ejected from a nozzle needs to pass through the runner and then enter a mold cavity, and when products are molded each time, the injection molding structure can generate redundant water gap materials on the runner, so that resource waste is caused, and the production cost of enterprises is increased.
Disclosure of Invention
The invention provides a runner-free injection molding structure aiming at the defects in the prior art, which can enable a nozzle to directly inject plastic into a cavity of a mold, avoid the generation of a nozzle material, save resources and reduce the production cost of enterprises.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The runner-free injection molding structure comprises a lower die, an upper die and an injection molding barrel, wherein a cavity for molding a product is formed between the lower die and the upper die, a nozzle is arranged on the injection molding barrel, and a discharge hole on the nozzle is directly communicated with the cavity during injection molding.
As a preferable scheme, the upper die is provided with an injection through hole, and the injection nozzle stretches into the injection through hole during injection so that a discharge hole on the injection nozzle is directly communicated with the cavity.
As a preferable scheme, an upper die mounting seat for mounting an upper die is arranged on the outer side of the injection molding charging barrel, and the upper die is movably mounted on the upper die mounting seat.
As a preferable scheme, the upper die is connected with the upper die mounting seat through a guide piece, the axial direction of the guide piece is the same as the axial direction of the injection molding charging barrel, a buffer spring is sleeved on the guide piece between the upper die and the upper die mounting seat, and two ends of the buffer spring are respectively propped against the upper die and the upper die mounting seat.
As a preferable scheme, the guide piece is a guide screw, threaded holes and guide holes corresponding to the guide screw are respectively formed in the upper die and the upper die mounting seat, one end of the guide screw is in threaded connection with the upper die through the threaded holes, and the other end of the guide screw is in sliding connection with the upper die mounting seat through the guide holes.
As a preferable scheme, the upper die mounting seat is provided with an adjusting screw, the free end of the adjusting screw stretches into a gap between the upper die and the upper die mounting seat, and the free end of the adjusting screw is in abutting connection with the upper die.
As a preferred scheme, adjusting screw's free end is equipped with the projection, the external diameter of projection is less than adjusting screw's external diameter, go up the mould and be equipped with the shrinkage pool that corresponds with the projection, go up and be equipped with the limiting plate between mould and the last mould mount pad, limiting plate and last mould fixed connection, be connected with the nut on the adjusting screw, the nut is located the one side that the limiting plate was kept away from to last mould mount pad.
As a preferable scheme, the limiting plate is respectively provided with a nozzle abdication through hole, a spring abdication through hole and a screw abdication through hole which correspond to the nozzle, the buffer spring and the adjusting screw.
As a preferable scheme, an upper cavity and a lower cavity are respectively arranged on the upper die and the lower die, and the upper cavity and the lower cavity are combined to form a cavity during die assembly.
As a preferable scheme, the output end of the injection molding charging barrel is connected with at least two injection nozzle mounting seats, the injection nozzle mounting seats are respectively provided with a material distribution channel communicated with the corresponding injection nozzle, a cavity corresponding to the injection nozzle is arranged between the upper die and the lower die, and the injection nozzle is provided with a heating ring.
Compared with the prior art, the invention has obvious advantages and beneficial effects, in particular, by arranging the lower die, the upper die and the injection molding cylinder, a cavity for molding products is arranged between the lower die and the upper die, the injection nozzle is arranged on the injection molding cylinder, and a discharge hole on the injection nozzle is directly communicated with the cavity during injection molding, so that the injection nozzle can directly inject plastic into the cavity of the die, the generation of water gap materials can be avoided, resources are saved, and the production cost of enterprises is reduced; by arranging the buffer spring, the impact of the upper die on the lower die can be slowed down during die assembly, and the upper die and the lower die are prevented from being damaged due to overlarge impact; when the free end of the adjusting screw is abutted against the upper die during injection molding, the injection molding cylinder stops moving, and the position of the injection nozzle can be adjusted by adjusting the position of the adjusting screw, so that the attaching precision of the injection nozzle and the cavity is adjusted, and the molding quality of a product is improved; through setting up the projection at adjusting screw's free end, set up in the shrinkage pool that the projection corresponds on last mould, the cooperation of projection and shrinkage pool plays the guide effect, can improve stability and the accuracy of penetrating mouth and die cavity butt joint.
For a clearer description of the structural features, technical means, and specific objects and functions achieved by the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments:
drawings
FIG. 1 is a schematic diagram of an assembled structure of an embodiment of the present invention;
FIG. 2 is an exploded view of an embodiment of the present invention;
FIG. 3 is a schematic cross-sectional view of an embodiment of the present invention;
FIG. 4 is an exploded view of another embodiment of the present invention;
FIG. 5 is a schematic cross-sectional view of another embodiment of the present invention.
The attached drawings are used for identifying and describing:
10-lower die; 11-upper die; 111-injection molding through holes;
112-a threaded hole; 113-concave holes; 12-a cavity;
20-a plastic injection cylinder; 201-injecting nozzle; 21-an upper die mounting seat;
211-a guide hole; 22-lead screw; 23-buffer springs;
24-limiting plates; 241-nozzle relief through hole; 242-spring relief through holes;
243-screw relief through holes; 25-adjusting the screw; 251-convex column;
26-nut; 30-a nozzle mounting seat; 31-material dividing channel.
Detailed Description
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of description and to simplify the description, and do not indicate or imply that the positions or elements referred to must have specific directions, be configured and operated in specific directions, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood as appropriate by those of ordinary skill in the art.
As shown in fig. 1-3, in this embodiment, a runner-free injection molding structure comprises a lower mold 10, an upper mold 11 and an injection molding barrel 20, wherein a cavity 12 for molding a product is arranged between the lower mold 10 and the upper mold 11, an upper cavity and a lower cavity are respectively arranged on the upper mold 11 and the lower mold 10, the upper cavity and the lower cavity are combined to form the cavity 12 during mold closing, a nozzle 201 is arranged on the injection molding barrel 20, the upper mold 11 is provided with an injection molding through hole 111, the nozzle 201 stretches into the injection molding through hole 111 during injection molding to enable a discharge hole on the nozzle 201 to be directly communicated with the cavity 12, an upper mold mounting seat 21 for mounting the upper mold 11 is arranged on the outer side of the injection molding barrel 20, the upper mold 11 is movably mounted on the upper mold mounting seat 21, the upper mold 11 is connected with the upper mold mounting seat 21 through a guide piece, and the axial direction of the guide piece is the same as the axial direction of the injection molding barrel 20, the guide piece between the upper die 11 and the upper die mounting seat 21 is sleeved with a buffer spring 23, two ends of the buffer spring 23 are respectively propped against the upper die 11 and the upper die mounting seat 21, the guide piece is a guide screw rod 22, threaded holes 112 and guide holes 211 corresponding to the guide screw rod 22 are respectively arranged on the upper die 11 and the upper die mounting seat 21, one end of the guide screw rod 22 is in threaded connection with the upper die 11 through the threaded holes 112, the other end of the guide screw rod 22 is in sliding connection with the upper die mounting seat 21 through the guide holes 211, the upper die mounting seat 21 is provided with an adjusting screw rod 25, the free end of the adjusting screw rod 25 stretches into a gap between the upper die 11 and the upper die mounting seat 21, the free end of the adjusting screw rod 25 is in abutting connection with the upper die 11, the injection molding charging barrel 20 moves downwards when the free end of the adjusting screw rod 25 is in abutting connection with the upper die 11, the injection molding barrel 20 stops moving, the position of the nozzle 201 can be adjusted by adjusting the position of the adjusting screw 25, so that the attaching precision of the nozzle 201 and the cavity 12 is adjusted, the product forming quality is improved, a convex column 251 is arranged at the free end of the adjusting screw 25, the outer diameter of the convex column 251 is smaller than that of the adjusting screw 25, a concave hole 113 corresponding to the convex column 251 is arranged on the upper die 11, the convex column 251 is arranged at the free end of the adjusting screw 25, the concave hole 113 corresponding to the convex column 251 is arranged on the upper die 11, and the matching of the convex column 251 and the concave hole 113 plays a guiding role, so that the stability and accuracy of the butt joint of the nozzle 201 and the cavity 12 can be improved. Be equipped with limiting plate 24 between last mould 11 and the last mould mount pad 21, limiting plate 24 and last mould 11 fixed connection, be connected with nut 26 on the adjusting screw 25, nut 26 is located the one side that last mould mount pad 21 kept away from limiting plate 24, be equipped with respectively on the limiting plate 24 with penetrate mouth 201, buffer spring 23 and adjusting screw 25 corresponding penetrate mouth and step down through-hole 241, spring step down through-hole 242 and screw rod step down through-hole 243.
In another embodiment, as shown in fig. 4-5, the difference from the above embodiment is that the output end of the injection molding barrel 20 is connected with two nozzle mounting seats 30, two nozzles 201 are provided, the nozzle mounting seats 30 are respectively provided with a material separating channel 31 that communicates with the corresponding nozzle 201, a cavity 12 corresponding to the two nozzles 201 is provided between the upper mold 11 and the lower mold 10, and a heating ring (not shown in the figure) is installed on the nozzle 201.
In the present invention, the limiting plate 24 may be fixedly connected to the upper die mounting base 21, the adjusting screw 25 is disposed on the upper die 11, and the concave hole 113 is disposed on the upper die mounting base 21.
It should be noted that the present invention may be used in vertical injection molding machine as well as horizontal injection molding machine.
In summary, according to the invention, the lower die, the upper die and the injection molding cylinder are arranged, the cavity for molding the product is arranged between the lower die and the upper die, the injection nozzle is arranged on the injection molding cylinder, and the discharge port on the injection nozzle is directly communicated with the cavity during injection molding, so that the injection nozzle can directly inject plastic into the cavity of the die, the generation of water gap materials can be avoided, resources are saved, and the production cost of enterprises is reduced; by arranging the buffer spring, the impact of the upper die on the lower die can be slowed down during die assembly, and the upper die and the lower die are prevented from being damaged due to overlarge impact; when the free end of the adjusting screw is abutted against the upper die during injection molding, the injection molding cylinder stops moving, and the position of the injection nozzle can be adjusted by adjusting the position of the adjusting screw, so that the attaching precision of the injection nozzle and the cavity is adjusted, and the molding quality of a product is improved; through setting up the projection at adjusting screw's free end, set up in the shrinkage pool that the projection corresponds on last mould, the cooperation of projection and shrinkage pool plays the guide effect, can improve stability and the accuracy of penetrating mouth and die cavity butt joint.
The foregoing description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, so any modifications, equivalents, improvements, etc. of the above embodiments according to the present invention are still within the scope of the present invention.
Claims (5)
1. The runner-free injection molding structure is characterized by comprising a lower die, an upper die and an injection molding barrel, wherein a cavity for molding a product is arranged between the lower die and the upper die, an injection nozzle is arranged on the injection molding barrel, an injection molding through hole is formed in the upper die, and the injection nozzle stretches into the injection molding through hole during injection molding to enable a discharge hole on the injection nozzle to be directly communicated with the cavity;
the outer side of the injection molding charging barrel is provided with an upper die mounting seat for mounting an upper die, the upper die is movably mounted on the upper die mounting seat, the upper die is connected with the upper die mounting seat through a guide piece, the axial direction of the guide piece is the same as that of the injection molding charging barrel, a buffer spring is sleeved on the guide piece between the upper die and the upper die mounting seat, two ends of the buffer spring are respectively abutted against the upper die and the upper die mounting seat, the guide piece is a guide screw, threaded holes and guide holes corresponding to the guide screw are respectively formed in the upper die and the upper die mounting seat, one end of the guide screw is in threaded connection with the upper die through the threaded holes, and the other end of the guide screw is in sliding connection with the upper die mounting seat through the guide holes;
The upper die mounting seat is provided with an adjusting screw, the free end of the adjusting screw stretches into a gap between the upper die and the upper die mounting seat, the free end of the adjusting screw is in abutting connection with the upper die, a limiting plate is arranged between the upper die and the upper die mounting seat, the limiting plate is fixedly connected with the upper die, the adjusting screw is connected with a nut, and the nut is located on one side, far away from the limiting plate, of the upper die mounting seat.
2. The runner-free injection molding structure according to claim 1, wherein the free end of the adjusting screw is provided with a convex column, the outer diameter of the convex column is smaller than that of the adjusting screw, and the upper die is provided with a concave hole corresponding to the convex column.
3. The runner-free injection molding structure according to claim 1, wherein the limiting plate is provided with a nozzle abdication through hole, a spring abdication through hole and a screw abdication through hole corresponding to the nozzle, the buffer spring and the adjusting screw respectively.
4. The runner-free injection molding structure according to claim 1, wherein the upper mold and the lower mold are respectively provided with an upper cavity and a lower cavity, and the upper cavity and the lower cavity are combined to form a cavity when the molds are closed.
5. The runner-free injection molding structure according to claim 1, wherein the output end of the injection molding charging barrel is connected with at least two injection nozzle mounting seats, the injection nozzle mounting seats are respectively provided with a material distribution channel communicated with the corresponding injection nozzle, a cavity corresponding to the injection nozzle is arranged between the upper die and the lower die, and a heating ring is arranged on the injection nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911338125.4A CN110900976B (en) | 2019-12-23 | 2019-12-23 | Runner-free injection molding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911338125.4A CN110900976B (en) | 2019-12-23 | 2019-12-23 | Runner-free injection molding structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110900976A CN110900976A (en) | 2020-03-24 |
| CN110900976B true CN110900976B (en) | 2024-08-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911338125.4A Active CN110900976B (en) | 2019-12-23 | 2019-12-23 | Runner-free injection molding structure |
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| Country | Link |
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| CN (1) | CN110900976B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211279566U (en) * | 2019-12-23 | 2020-08-18 | 东莞市嘉兴昌机械工业有限公司 | Runner-free injection molding structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200433762Y1 (en) * | 2006-09-27 | 2006-12-12 | 주식회사 평화이엔지 | Multi nozzle equipment of injection molding machine |
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- 2019-12-23 CN CN201911338125.4A patent/CN110900976B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN211279566U (en) * | 2019-12-23 | 2020-08-18 | 东莞市嘉兴昌机械工业有限公司 | Runner-free injection molding structure |
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| Publication number | Publication date |
|---|---|
| CN110900976A (en) | 2020-03-24 |
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