CN112406030A - Mould decompression structure of thermosetting material - Google Patents
Mould decompression structure of thermosetting material Download PDFInfo
- Publication number
- CN112406030A CN112406030A CN202011310047.XA CN202011310047A CN112406030A CN 112406030 A CN112406030 A CN 112406030A CN 202011310047 A CN202011310047 A CN 202011310047A CN 112406030 A CN112406030 A CN 112406030A
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- Prior art keywords
- mould
- decompression
- space
- pressure reducing
- mold
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- 239000000463 material Substances 0.000 title claims abstract description 52
- 230000006837 decompression Effects 0.000 title claims abstract description 41
- 229920001187 thermosetting polymer Polymers 0.000 title claims abstract description 25
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 2
- 230000004308 accommodation Effects 0.000 claims 2
- 238000006073 displacement reaction Methods 0.000 claims 1
- 238000001746 injection moulding Methods 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
- B29C45/26—Moulds
- B29C45/2669—Moulds with means for removing excess material, e.g. with overflow cavities
-
- 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
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2701—Details not specific to hot or cold runner channels
- B29C45/2708—Gates
-
- 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
- B29C45/38—Cutting-off equipment for sprues or ingates
-
- 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
- B29C45/2669—Moulds with means for removing excess material, e.g. with overflow cavities
- B29C2045/2671—Resin exit gates or bleeder passages
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2101/00—Use of unspecified macromolecular compounds as moulding material
- B29K2101/10—Thermosetting resins
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The utility model provides a thermosetting material's mould decompression structure, includes mould body, decompression mechanism, this internal mould benevolence chamber that is provided with of mould, decompression mechanism have with the decompression space of mould benevolence chamber UNICOM, the decompression space in be provided with to the moving part that has decompression free distance on one side of mould benevolence chamber UNICOM direction. The invention has the advantage of effectively reducing the damage rate of the preset workpiece in the injection molding process.
Description
Technical Field
The invention relates to the technical field of mold structures, in particular to a mold decompression structure for thermosetting materials.
Background
The thermosetting material is widely applied to modern industrial products, particularly used for forming protective shells of electric and mechanical products, in the production process of the products, a workpiece needs to be preset in a mold firstly, then injection molding is carried out, due to the characteristic that the thermosetting material cannot be recycled for the second time after being formed, a sprue and the thermosetting material in the sprue bush are recycled as much as possible through the mold structure in the injection molding process, so that waste and environmental pollution are reduced, in the actual operation process, when the last part of the thermosetting material is injected into the mold, the pressure in the mold is multiplied, the deformation damage rate of the workpiece is increased due to overhigh internal pressure in the injection molding process, and the service life of the mold is greatly reduced.
Disclosure of Invention
The invention aims to provide a mould decompression structure for thermosetting materials, and the mould decompression structure provided by the invention is used for solving the problems in the prior art.
The technical purpose of the invention is realized by the following technical scheme: the utility model provides a thermosetting material's mould decompression structure, includes mould body, decompression mechanism, this internal mould benevolence chamber that is provided with of mould, decompression mechanism have with the decompression space of mould benevolence chamber UNICOM, the decompression space in be provided with to the moving part that has decompression free distance on one side of mould benevolence chamber UNICOM direction.
Preferably, the sprue bush of the mold core cavity is provided with a material cutting thimble, and the length of the decompression movable distance is less than or equal to the stroke length of the material cutting thimble in the sprue bush.
Preferably, the pressure reducing space is a receiving hole formed in the inner side wall of the mold cavity, the movable member is disposed in the pressure reducing space, and the pressure reducing space has a movable stroke reciprocating along an axial direction of the pressure reducing space.
Preferably, the pressure reducing space is disposed on the opposite side of the sprue bush of the mold core cavity, and the moving direction of the moving member is parallel to the moving direction of the material cutting thimble disposed in the sprue bush.
Preferably, the cavity comprises at least one pure material area, and the sprue bush and the decompression space are respectively arranged on two opposite sides of the pure material area.
Preferably, the pressure reducing space is an independent space arranged on one side of the die cavity, and the pressure reducing space is communicated with the die cavity through a clearance channel.
Preferably, the moving direction of the moving member is parallel to the communicating direction of the gap passage.
Preferably, the cavity comprises at least one pure material region, the pure material region is connected with at least one side wall of the cavity, the clearance channel is arranged on the side wall connected with the pure material region, and the clearance channel is arranged on the die assembly surface of the cavity.
Preferably, when the movable member is located at the maximum length of the decompression movable distance, the discharge volume of the movable member is equal to or less than the volume of the sprue bush.
In conclusion, the invention has the following beneficial effects:
the invention has the advantages of effectively reducing the damage rate of the preset workpiece in the injection molding process and prolonging the service life of the mold.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the present invention;
in the figure: 1-a mould body; 2-a pressure reducing mechanism; 1-1-upper mold; 1-2-lower die; 3-a mold cavity; 2-1-a reduced pressure space; 2-2-moving parts; 4-sprue bush; 5-cutting ejector pins; 3-1-a pure material area; 3-2-workpiece presetting area; 6-a workpiece; 7-gap channel.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the present embodiment includes a mold body 1 and a pressure reducing mechanism 2, wherein the mold body 1 is composed of an upper mold 1-1 and a lower mold 1-2, and also includes an embodiment of a male mold and a female mold, a mold core cavity 3 is disposed in the mold body 1, the mold core cavity 3 is used for injection molding, the pressure reducing mechanism 2 has a pressure reducing space 2-1 communicated with the mold core cavity 3, a moving member 2-2 having a pressure reducing moving distance to one side of the communicating direction of the mold core cavity 3 is disposed in the pressure reducing space 2-1, and the moving member 2-2 is controlled by an oil cylinder, an air cylinder, an electric telescopic motor, or other devices.
The sprue bush 4 of the die core cavity 3 is provided with a cutting thimble 5, the length of the decompression movable distance is smaller than or equal to the stroke length of the cutting thimble 5 in the sprue bush 4, when the injection molding of the die core cavity 3 is completed, the cutting thimble 5 presses down to cut off the supply of the thermosetting material and simultaneously presses the residual thermosetting material in the sprue bush 4 into the die core cavity 3 in a set time, at the moment, the pressure in the die core cavity 3 is increased, the movable part 2-2 moves from one side of the die core cavity 3 to the other side before or simultaneously when the cutting thimble 5 presses down, the pressure in the die core cavity 3 is reduced, the pressure increase caused by the pressing down of the cutting thimble 5 is balanced, and thus, the preset workpiece 6 in the die core cavity 3 can be effectively protected from being damaged due to overhigh cavity pressure. When the moving part 2-2 is located at the maximum length of the decompression movable distance, namely when the moving part 2-2 extends to the maximum length into the mold cavity 3, the discharge volume of the moving part 2-2 is less than or equal to the volume of the sprue bush 4, and the discharge volume is the material volume of the space in the mold cavity 3 occupied by the moving part 2-2 in front of the accommodating hole at the maximum moving distance.
As shown in fig. 1, a first embodiment of the pressure reducing mechanism 2 of this embodiment is that a pressure reducing space 2-1 is formed by an accommodating hole formed in an inner side wall of a mold cavity 3 and a space in the mold cavity 3 occupied by a movable element in front of the accommodating hole for the maximum moving distance, the movable element 2-2 is disposed in the accommodating hole of the pressure reducing space 2-1, and a moving stroke reciprocating along an axial direction of the pressure reducing space 2-1 is provided in the pressure reducing space 2-1. The position of the receiving hole may be specifically adjusted according to the mold or the product itself during the implementation, and may be set parallel to the sprue bush 4, or may be set perpendicular to or inclined from the sprue bush 4, or may be set on the same side as or opposite side to the sprue bush 4. Preferably, the decompression space 2-1 of the present embodiment is preferably disposed on the opposite side of the sprue bush 4 of the mold core cavity 3, and the moving direction of the movable member 2-2 is parallel to the moving direction of the material cutting thimble 5 disposed in the sprue bush 4. The mold cavity 3 at least comprises a pure material area 3-1, because the present embodiment is mainly directed to a mold for injection molding after presetting a workpiece 6, there is inevitably an area blocked by the workpiece 6 in the cavity 3, which is a predetermined area 3-2 of the workpiece, other parts without the workpiece 6 form a pure material area 3-1, thermosetting materials in the pure material area 3-1 can move according to self adaptation to pressure and are not blocked by the workpiece 6, the sprue bush 4 and the decompression space 2-1 are respectively arranged at two opposite sides of the pure material area 3-1, in this state, the flow of the thermosetting material from the feeding direction of the sprue bush 4 to the direction of the space formed after the movable member 2-2 of the decompression space 2-1 is retracted is not blocked by the work 6, so that the force of the feeding pressure acting on the work 6 is further reduced.
As shown in fig. 2, the pressure reducing mechanism 2 of the second embodiment is that the pressure reducing space 2-1 is an independent space disposed at one side of the mold core cavity 3, and the pressure reducing space 2-1 is communicated with the mold core cavity 3 through a gap channel 7, and preferably, the volume of the gap channel 7 is less than 0.05% of the volume of the sprue bush 4. In this embodiment, the moving direction of the moving member 2-2 is preferably arranged in parallel with the communicating direction of the clearance channel 7, which does not exclude the arrangement mode of other moving directions of the moving member 2-2. The mould cavity 3 at least comprises a pure material area 3-1, the pure material area 3-1 is at least connected with one side wall of the mould cavity 3, a clearance channel 7 is arranged on the side wall connected with the pure material area 3-1, and the clearance channel 7 is arranged on the joint surface of the mould cavity 3. the specific implementation mode of the embodiment is that an invagination groove and a communicating groove are started on the joint surface of an upper mould 1-1 and a lower mould 1-2, when the upper mould and the lower mould are closed, the mould cavity 3 is formed completely, the communicating grooves at two sides form the clearance channel 7, the invagination grooves at two sides form a decompression space 2-1, a through hole is started on the side wall of the decompression space 2-1, a moving part 2-2 is arranged in the through hole and performs telescopic movement towards the decompression space 2-1 to achieve decompression action, when the injection moulding of the mould cavity 3 is nearly completed, a cutting thimble 5 presses down to cut off the thermosetting material supply and presses the residual thermosetting material in a sprue bush 4 into the mould cavity, at the moment, the pressure in the die cavity 3 is increased, and meanwhile, the moving part 2-2 is contracted into the through hole, so that the pressure in the decompression space 2-1 is reduced, the pressure in the die cavity 3 is synchronously reduced through the communication of the gap channel 7, the pressure increase caused by the pressing down of the material cutting thimble 5 is balanced, and thus, a workpiece 6 preset in the die cavity 3 can be effectively protected from being damaged due to overhigh pressure in the cavity, the redundant material formed in the gap channel 7 can be cut off after the injection molding is finished, and the material consumption can be greatly reduced due to the small volume of the gap channel 7.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (9)
1. A mould decompression structure of thermosetting material is characterized in that: the mould comprises a mould body (1) and a pressure reducing mechanism (2), wherein a mould core cavity (3) is arranged in the mould body (1), the pressure reducing mechanism (2) is provided with a pressure reducing space (2-1) communicated with the mould core cavity (3), and a moving part (2-2) with a pressure reducing moving distance towards one side of the communicating direction of the mould core cavity (3) is arranged in the pressure reducing space (2-1).
2. The structure for decompressing a mold of a thermosetting material according to claim 1, wherein: the sprue bush (4) of the die core cavity (3) is provided with a cutting thimble (5), and the length of the decompression movable distance is less than or equal to the stroke length of the cutting thimble (5) in the sprue bush (4).
3. The structure for decompressing a mold of a thermosetting material according to claim 1, wherein: decompression space (2-1) by set up in accommodation hole on mould benevolence chamber (3) inside wall reaches accommodation hole the place ahead shared during moving part (2-2) maximum displacement space in the mould benevolence chamber (3) constitutes jointly, moving part (2-2) set up in decompression space (2-1), and decompression space (2-1) in have along decompression space (2-1) axial direction is reciprocating motion's movable stroke.
4. The pressure reducing structure for thermosetting material molds according to claim 3, wherein: the decompression space (2-1) is arranged on the opposite side of a sprue bush (4) of the die core cavity (3), and the moving direction of the moving piece (2-2) is arranged in parallel relative to the moving direction of a material cutting thimble (5) arranged in the sprue bush (4).
5. The pressure reducing structure for thermosetting material molds according to claim 4, wherein: the die core cavity (3) at least comprises a pure material area (3-1), and the sprue bush (4) and the decompression space (2-1) are respectively arranged at two opposite sides of the pure material area (3-1).
6. The structure for decompressing a mold of a thermosetting material according to claim 1, wherein: the pressure reducing space (2-1) is an independent space arranged on one side of the die cavity (3), and the pressure reducing space (2-1) is communicated with the die cavity (3) through a clearance channel (7).
7. The thermosetting material mold decompression structure according to claim 6, wherein: the moving direction of the moving piece (2-2) is parallel to the communication direction of the gap channel (7).
8. The thermosetting material mold decompression structure according to claim 6, wherein: the mould core cavity (3) at least comprises a pure material area (3-1), the pure material area (3-1) is at least connected with one side wall of the mould core cavity (3), the clearance channel (7) is arranged on the side wall connected with the pure material area (3-1), and the clearance channel (7) is arranged on the mould clamping surface of the mould core cavity (3).
9. The structure for decompressing a mold of a thermosetting material according to claim 2, wherein: when the movable piece (2-2) is positioned at the maximum length of the decompression movable distance, the discharge volume of the movable piece (2-2) is less than or equal to the volume of the sprue bush (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011310047.XA CN112406030A (en) | 2020-11-20 | 2020-11-20 | Mould decompression structure of thermosetting material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011310047.XA CN112406030A (en) | 2020-11-20 | 2020-11-20 | Mould decompression structure of thermosetting material |
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| Publication Number | Publication Date |
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| CN112406030A true CN112406030A (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011310047.XA Pending CN112406030A (en) | 2020-11-20 | 2020-11-20 | Mould decompression structure of thermosetting material |
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| CN (1) | CN112406030A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004009586A (en) * | 2002-06-07 | 2004-01-15 | Nissan Motor Co Ltd | Injection mold and injection molding method |
| JP2005153334A (en) * | 2003-11-26 | 2005-06-16 | Mitsubishi Materials Corp | Valve gate type mold device |
| CN101279487A (en) * | 2007-04-05 | 2008-10-08 | 鸿富锦精密工业（深圳）有限公司 | Mold |
| JP2017164994A (en) * | 2016-03-16 | 2017-09-21 | 富士電機株式会社 | Resin molding machine and resin molding method |
| CN207535229U (en) * | 2017-08-29 | 2018-06-26 | 深圳市盼的科技有限公司 | A kind of needle-valve hot-runner device |
| CN214188186U (en) * | 2020-11-20 | 2021-09-14 | 浙江傲邦科技有限公司 | Mould decompression structure of thermosetting material |
-
2020
- 2020-11-20 CN CN202011310047.XA patent/CN112406030A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004009586A (en) * | 2002-06-07 | 2004-01-15 | Nissan Motor Co Ltd | Injection mold and injection molding method |
| JP2005153334A (en) * | 2003-11-26 | 2005-06-16 | Mitsubishi Materials Corp | Valve gate type mold device |
| CN101279487A (en) * | 2007-04-05 | 2008-10-08 | 鸿富锦精密工业（深圳）有限公司 | Mold |
| JP2017164994A (en) * | 2016-03-16 | 2017-09-21 | 富士電機株式会社 | Resin molding machine and resin molding method |
| CN207535229U (en) * | 2017-08-29 | 2018-06-26 | 深圳市盼的科技有限公司 | A kind of needle-valve hot-runner device |
| CN214188186U (en) * | 2020-11-20 | 2021-09-14 | 浙江傲邦科技有限公司 | Mould decompression structure of thermosetting material |
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