CN106079255A - A kind of micro plastic mould being easy to produce - Google Patents
A kind of micro plastic mould being easy to produce Download PDFInfo
- Publication number
- CN106079255A CN106079255A CN201610397353.9A CN201610397353A CN106079255A CN 106079255 A CN106079255 A CN 106079255A CN 201610397353 A CN201610397353 A CN 201610397353A CN 106079255 A CN106079255 A CN 106079255A
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- Prior art keywords
- runner
- sub
- dynamic model
- fraction
- die cavity
- Prior art date
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- 229920000426 Microplastic Polymers 0.000 title claims abstract description 17
- 238000007599 discharging Methods 0.000 claims description 11
- 230000008676 import Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000001746 injection moulding Methods 0.000 abstract description 3
- 238000002347 injection Methods 0.000 description 11
- 239000007924 injection Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 9
- 239000012768 molten material Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 229920003023 plastic Polymers 0.000 description 7
- 239000004033 plastic Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003672 processing method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 210000003918 fraction a Anatomy 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000003643 water by type 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
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
-
- 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
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/2756—Cold runner 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
- B29C45/26—Moulds
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
-
- 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
- B29C45/34—Moulds having venting means
-
- 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
- B29C45/40—Removing or ejecting moulded articles
- B29C45/4005—Ejector constructions; Ejector operating mechanisms
-
- 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
- B29C2045/0094—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor injection moulding of small-sized articles, e.g. microarticles, ultra thin articles
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The present invention relates to injection molding apparatus field, be specifically related to a kind of micro plastic mould be easy to and produce, including four sub-runners, sub-runner is horizontally disposed with in cross centered by sprue, a length of the 35 of sub-runner～40mm；Each sub-runner both sides are all arranged with the two fraction runners no less than four, and two fraction runners are perpendicular to sub-runner, and two fraction runner two ends are respectively communicated with two fraction runner and die cavities, and the spacing between die cavity is 7～8mm；Sub-runner a diameter of 2.5～3.5mm；Two fraction runners a diameter of 1.5～2.5mm, a length of 0.5～3mm；Connect with cast gate between two fraction runners and die cavity, and sub-runner end is provided with cold slug well.The micro plastic mould being easy to produce proposed in the present invention is improving while production rate, it is ensured that and improve product go out yield.
Description
Technical field
The present invention relates to injection molding apparatus field, be specifically related to a kind of micro plastic mould be easy to and produce.
Background technology
Injection mo(u)lding is also known as injection molding molding, and it is a kind of forming method injecting molding of holding concurrently.Injection mo(u)lding can be by
Letter is to numerous, and size can be descending, and product size is accurate, can shape the product of complexity, and injection mo(u)lding is applicable in a large number
The processing and forming fields such as production and complex-shaped product.Injection mold is a kind of work producing plasthetics in injection mo(u)lding
Tool, is also to confer to the instrument of plasthetics complete structure and accurate dimension.Injection molded is to produce some shape in batches again
A kind of processing method used during miscellaneous parts.Refer specifically to by high pressure, the material melted that is heated is injected die cavity, after cooled solidification,
Obtain formed products.
On digital product, most of parts are all to use injection molded processing method to be prepared from, with flashing lamp lens
As a example by, conventional flashing lamp lens material is plastic cement material and the big class of glass two, wherein the eyeglass of plastic cement material because of raw material easy
Obtain and process simple reason, becoming main use material；But, in the existing plastic lens mould mode of production,
Yield and quality can only ensure one, say, that if ensureing the productivity ratio of product, will reduce the yield that of product, and making
The reason becoming this problem is in runner environment in gas present in the processing mode of cold burden forward, die cavity and die cavity
The problem such as preservation of raw material energy in degree of drying, and runner.
Going out at present the subject matter that yield declines with the rising of productivity ratio in plastic lens mould applications is setting of mould
Count unreasonable, can by the adjustment of mould structure and redesign realize the productivity ratio of plastic lens and go out yield common
The effect improved.
Summary of the invention
It is an object of the invention to propose a kind of micro plastic mould be easy to and produce, this device has reasonable in design dividing
Runner and cast gate and aerofluxus and cold burden processing means, and there is the arrangement of rational die cavity.
For reaching this purpose, the present invention by the following technical solutions: a kind of micro plastic mould being easy to produce, including relatively
The fixed half and moving half arranged, described fixed half and moving half is provided with cavity, and described cavity includes die cavity, sprue and sub-runner；Described
Dynamic model is located at the top of described cover half；Described sprue is located at described dynamic model center, connects upper surface and the following table of described dynamic model
Face；Described sub-runner contacts with each other the tubular conduit that the cavity in face combines by being opened in described cover half and dynamic model, its one end
Connect described sprue；Described die cavity is located at described dynamic model, for channel-shaped, is positioned at the contact surface of described dynamic model and described cover half；Institute
Stating sub-runner is four, is horizontally disposed with in cross, a length of the 35 of described sub-runner～40mm centered by described sprue；
Each described sub-runner both sides are all arranged with the two fraction runners no less than four, and described two fraction runners are perpendicular to described shunting
Road, described two fraction runner two ends are respectively communicated with described sub-runner and described die cavity, and the spacing between described die cavity is 7～8mm；
Described sub-runner a diameter of 2.5～3.5mm；Described two fraction runners a diameter of 1.5～2.5mm, a length of 0.5～3mm；Described
Connect with cast gate between two fraction runners and die cavity, and described sub-runner end is provided with cold slug well；It is provided with in described cover half and ejects
Mechanism, described ejecting mechanism acts on cast gate, sub-runner or cold slug well.
It is preferred that dynamic model is located at by described cast gate, it is positioned at cavity surface, connects the end of described two fraction runners and described type
Chamber；Described cast gate is charging aperture with one end of described two fraction flow passage, and the one end connected with described die cavity is discharging opening；And
Described cast gate a length of 0.4～0.6mm, charging aperture width is 0.4～0.6mm, and discharging opening width is 0.25～0.35mm, described
Gate depth is 0.3～0.34mm.
Preferably, described cold slug well is cylindrical cavity, the cavity of described cover half and described dynamic model combine and formed, its top
The a diameter of 5mm in portion, base diameter is less than top diameter, and the degree of depth is 5～7mm, and tapering is 0.5～1 degree.
Preferably, also include that air discharge duct, described air discharge duct are located at described dynamic model, be positioned at the lower surface of described dynamic model, connection
Described cold slug well and the sidewall of described dynamic model, described air discharge duct is perpendicular to described sidewall；Described air discharge duct width be 3.5～
4.5mm, height is 0.2～0.3mm.
It is preferred that also include setting up cold slug well, it is respectively communicated with the described sub-runner of adjacent two by three fraction runners；Institute
State and set up cold slug well and described three fraction runners are located at described dynamic model, for channel-shaped, be located at the lower surface of described dynamic model；Described three grades
Sub-runner is perpendicular to described sub-runner；Described cold slug well of setting up is four, described in set up cold slug well apart from adjacent described shunting
Road is equal, and described three fraction runners form square, described in set up cold slug well and be located at described foursquare apex.
Preferably, a diameter of 3mm of described sub-runner；The described two a diameter of 2mm of fraction runner.
Preferably, a length of 0.5mm of described cast gate, import department's width is 0.5mm, and discharging opening width is 0.3mm, and the degree of depth is
0.32mm。
Preferably, the described cold slug well degree of depth is 6mm, and described air discharge duct width is 4mm.
The present invention uses said structure, makes the cold burden in mould structure be provided with simple and practical cold burden processing means, solves
Determine and reduced in producing because cold burden enters the problem affecting eyeglass light transmittance caused in die cavity, thus it is good to improve going out of product
Rate.
Accompanying drawing explanation
Fig. 1 is that in one embodiment of the invention, dynamic model looks up structural representation；
Fig. 2 is the cover half plan structure schematic diagram of one embodiment of the invention；
Fig. 3 is partial enlarged drawing at A in accompanying drawing 1 of the present invention；
Fig. 4 is the vertical section structural representation of one embodiment of the invention；
Fig. 5 is the front view of cast gate in one embodiment of the invention；
Fig. 6 is that the dynamic model of another embodiment of the present invention looks up structural representation.
Wherein label show: 1-cover half, 2-dynamic model, 3-die cavity, 4-sprue, 5-sub-runner, 5a-bis-fraction runner,
5b-tri-fraction runner, 6-cast gate, 7-cold slug well, 8-air discharge duct, 9-set up cold slug well.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings and by detailed description of the invention.
As Figure 1-5, a kind of micro plastic mould being easy to produce, including the cover half 1 being oppositely arranged and dynamic model 2, institute
Stating cover half 1 and dynamic model 2 is provided with cavity, described cavity includes die cavity 3, sprue 4 and sub-runner 5；It is described fixed that described dynamic model 2 is located at
The top of mould 1；Described sprue 4 is located at described dynamic model 2 center, connects the upper and lower surface of described dynamic model 2；Described shunting
Road 5 is opened in and is contacted with each other the tubular conduit that the cavity in face combines by described cover half 1 and dynamic model 2, and the connection of its one end is described
Sprue 4；Described die cavity 3 is located at described dynamic model 2, for channel-shaped, is positioned at the contact surface of described dynamic model 2 and described cover half 1；Described point
Runner 5 is four, is horizontally disposed with in cross centered by described sprue 4, a length of the 35～40mm of described sub-runner 5；
Each described sub-runner 5 both sides are all arranged with the two fraction runner 5a no less than four, described two fraction runner 5a and are perpendicular to institute
Stating sub-runner 5, described two fraction runner 5a two ends are respectively communicated with described sub-runner 5 and described die cavity 3, between described die cavity 3
Spacing is 7～8mm；Described sub-runner 5 a diameter of 2.5～3.5mm；Described two fraction runner 5a a diameter of 1.5～2.5mm, long
Degree is 0.5～3mm；Connect with cast gate 6 between described two fraction runner 5a and die cavity 3, and described sub-runner 5 end is provided with cold burden
Cave 7；Being provided with ejecting mechanism in described cover half 1, described ejecting mechanism acts on cast gate 6, sub-runner 5 or cold slug well 7.
Owing to processing component is little, therefore using unbalanced pouring type to combine cavity design, which has production effect
Rate is high, saves the feature of mold materials；And use shorter runner can reduce the energy loss in runner, reduce runner material
Material loss, does not affect the injecting condition of each die cavity, such as injection pressure, injection time etc. simultaneously.Ejecting mechanism is set and facilitates mould
The demoulding, in order to ensure the fineness of product surface, mould inside has carried out metal spraying etc in advance and has ensured that die cavity 3 is internal bright and clean
The technique of degree, thus the adhesive force between product and die cavity 3 is relatively low, provides convenience for the demoulding；Ejecting mechanism is arranged at and waters
The lower section of mouth 6, sub-runner 5 or cold slug well 7 is in order to avoid ejecting mechanism is arranged at below die cavity 3, avoids because ejecting work with this
Industry affects product surface quality.
Molten material is in sprue 4 enters into sub-runner 5, and the most molten material has energy and runs off, and causes a part
Cold burden, forms cold burden forward, and cold burden forward is directly entered in cold slug well 7 to sub-runner 5 end, and molten material afterwards can be from sub-runner
Flowing in two fraction runner 5a in 5, the molten material in two fraction runner 5a is in cast gate 6 injects die cavity 3, now in die cavity 3
Gas flows out from air discharge duct 8 because the space in die cavity 3 is reduced, until filling up molten material and product formation in die cavity, mould is beaten
Opening, product is released from mould by the ejecting mechanism of the lower section being now arranged at cast gate 6, sub-runner 5 or cold slug well 7.
Wherein, dynamic model 2 is located at by described cast gate 6, is positioned at cavity surface, connects the end of described two fraction runner 5a and described type
Chamber 3；One end that described cast gate 6 connects with described two fraction runner 5a is charging aperture, and the one end connected with described die cavity 3 is discharging
Mouthful；And described cast gate 6 a length of 0.4～0.6mm, charging aperture width is 0.4～0.6mm, discharging opening width be 0.25～
0.35mm, described cast gate 6 degree of depth is 0.3～0.34mm.
Cast gate 6 uses big charging aperture and less discharging opening to be the characteristics during injection for ensureing plastic melt, also may be used
To ensure the maintenance of pressure, it is also possible to guarantee the optimum of cooling；At melting charge completely into rear, real in pressurize and cooling procedure
The optimum of existing technique, it is ensured that plastics will not the phenomenon of so-called refluence；Owing to converted products is less, and surface quality requirements is relatively
Height, and also to be easy to be convenient in demoulding, the size of preferable mode.
Additionally, described cold slug well 7 is cylindrical cavity, the cavity of described cover half 1 and described dynamic model 2 combines and formed, its
Top diameter is 5mm, and base diameter is less than top diameter, and the degree of depth is 5～7mm, and tapering is 0.5～1 degree, and solution is in the work of cast
Heat can be lost during work in sub-runner 5, thus produce cold burden forward, and cold burden forward be combined with each other and will produce water wave
Melt line, cause this product to cancel, and the most preferably settling mode is to add cold slug well 7 in sub-runner 5, use cold slug well 7
Derive the cold burden forward in runner, it is to avoid cold burden forward enters in die cavity 3.
Wherein, also include that air discharge duct 8, described air discharge duct 8 are located at described dynamic model 2, be positioned at the lower surface of described dynamic model 2, even
Logical described cold slug well 7 and the sidewall of described dynamic model 2, described air discharge duct 8 is perpendicular to described sidewall；Described air discharge duct 8 width is 3.5
～4.5mm, height is 0.2～0.3mm；In die cavity 3, there is the problem such as bubble and air pocket in the bad interiors of products that can produce of aerofluxus, should
The problem of kind is owing to mould overall precision is high, is difficult to ventilative causing, and offers air discharge duct 8 so using below at cold slug well 7, to arrange
Air drain 8 and runner together with, make inside mould cavity and outside be provided with ventilative condition.
Be additionally provided with set up cold slug well 9 additionally, be positioned at two fraction runner 5a leading portions on described sub-runner 5, described in set up cold burden
Cave 9 is arranged between each sub-runner 5, and described sub-runner 5 both sides are respectively provided with for connecting the three fraction runners setting up cold slug well 9
5b, arranging and setting up cold slug well 9 is preferably to process cold burden when die trial, and cold burden is through setting up cold slug well 9 and cold slug well 7 two-stage
Process, preferably ensure that the quality of the molten material entered in die cavity 3.
Additionally, as shown in Figure 6, also include setting up cold slug well 9, be respectively communicated with adjacent two institute by three fraction runner 5b
State sub-runner 5；Described set up cold slug well 9 and described three fraction runner 5b are located at described dynamic model 2, for channel-shaped, be located at described dynamic model 2
Lower surface；Described three fraction runner 5b are perpendicular to described sub-runner 5；Described cold slug well 9 of setting up is four, described in set up cold burden
Cave 9 is equal apart from adjacent described sub-runner 5, and described three fraction runner 5b form square, described in set up cold slug well 9 and be located at institute
Stating foursquare apex, it is in order to preferably get rid of cold burden or higher at requirement on machining accuracy for arranging and setting up cold slug well 9
Mould time, by the cold burden in cavity through setting up cold slug well 9 and cold slug well 7 two stages for the treatment of such that it is able to preferably ensure
Enter the quality of molten material in die cavity 3.On sub-runner 5, arrange in the front end of two fraction runner 5a and set up cold slug well 9, at note
When moulding, temperature reduce cold burden enter sets up cold slug well 9, prevent cold burden enter die cavity 3 be combined with each other generation water wave melt line, cause
This product cancels.Improve the quality of product further.
Preferably, the described a diameter of 3mm of sub-runner 5；The described two fraction a diameter of 2mm of runner 5a.
Preferably, the described a length of 0.5mm of cast gate 6, a diameter of 0.5mm of import department, a diameter of 0.3mm of discharging opening；With dynamic
On the basis of mould 2 lower surface, described cast gate 6 degree of depth is 0.32mm.
Described cold slug well 7 degree of depth is 6mm, and described air discharge duct 8 width is 4mm.
The micro plastic mould being easy to produce of the present embodiment has the advantages that
1, being provided with cold slug well in mould structure, the effect of cold slug well is to collect the cold burden in runner, it is to avoid cold burden entrance type
In chamber, cause product that water wave line or the vestige of other influences light transmittance occur.
2, being provided with air discharge duct in mould structure, the waste gas in die cavity can be got rid of by air discharge duct, thus avoid because of die cavity
The problem that middle gas the most effectively processes causes product the problem that air pocket, pore etc. affect light transmittance occur.
3, little because of small product size and size, so have selected cavity design, cavity is designed to improve the life of product
Produce efficiency.
4, being provided with cast gate between mold runner with die cavity to connect, the charging aperture of cast gate is bigger than discharging opening, and this cast gate is at note
Certain injection force can be provided during material, thus ensure that molten material can quickly enter in die cavity, and it can be avoided that molten material backflow etc
Problem.
5, ejecting mechanism to arrange position more, because small product size and size are little, and light in this type of product mold die cavity
Cleanliness is high, and in die cavity, the adhesive force between product and mould is the least, so product only need to be released by the effect of liftout attachment,
So the push rod position of ejecting mechanism is not provided with below die cavity all right.
The know-why of the present invention is described above in association with specific embodiment.These describe and are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed to by any way.Based on explanation herein, the technology of this area
Personnel need not pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes fall within
Within protection scope of the present invention.
Claims (8)
1. being easy to the micro plastic mould produced, including the fixed half and moving half being oppositely arranged, described fixed half and moving half is provided with
Cavity, described cavity includes die cavity, sprue and sub-runner；
Described dynamic model is located at the top of described cover half；
Described sprue is located at described dynamic model center, connects the upper and lower surface of described dynamic model；
Described sub-runner contacts with each other the tubular conduit that the cavity in face combines by being opened in described cover half and dynamic model, its one end
Connect described sprue；
Described die cavity is located at described dynamic model, for channel-shaped, is positioned at the contact surface of described dynamic model and described cover half；
It is characterized in that: described sub-runner is four, is horizontally disposed with in cross centered by described sprue, described sub-runner
A length of 35～40mm；
Each described sub-runner both sides are all arranged with the two fraction runners no less than four, and described two fraction runners are perpendicular to described
Sub-runner, described two fraction runner two ends are respectively communicated with described two fraction runners and described die cavity, the spacing between described die cavity
It is 7～8mm；
Described sub-runner a diameter of 2.5～3.5mm；Described two fraction runners a diameter of 1.5～2.5mm, a length of 0.5～3mm；
Connect with cast gate between described two fraction runners and die cavity, and described sub-runner end is provided with cold slug well；In described cover half
Being provided with ejecting mechanism, described ejecting mechanism acts on cast gate, sub-runner or cold slug well.
The micro plastic mould being easy to produce the most according to claim 1, it is characterised in that: dynamic model is located at by described cast gate,
It is positioned at cavity surface, connects the end of described two fraction runners and described die cavity；Described cast gate and described two fraction flow passage
One end is charging aperture, and the one end connected with described die cavity is discharging opening；And described cast gate a length of 0.4～0.6mm, charging aperture width
Degree is 0.4～0.6mm, and discharging opening width is 0.25～0.35mm, and described gate depth is 0.3～0.34mm.
The micro plastic mould being easy to produce the most according to claim 1, it is characterised in that: described cold slug well is cylindric
Cavity, is combined by the cavity of described cover half and described dynamic model and is formed, and its top diameter is 5mm, and base diameter is less than top diameter,
The degree of depth is 5～7mm, and tapering is 0.5～1 degree.
The micro plastic mould being easy to produce the most according to claim 1, it is characterised in that: also include air discharge duct, described
Air discharge duct is located at described dynamic model, is positioned at the lower surface of described dynamic model, connects the sidewall of described cold slug well and described dynamic model, described row
Air drain is perpendicular to described sidewall；Described air discharge duct width is 3.5～4.5mm, and height is 0.2～0.3mm.
The micro plastic mould being easy to produce the most according to claim 1, it is characterised in that: also include setting up cold slug well,
It is respectively communicated with the described sub-runner of adjacent two by three fraction runners；Described set up cold slug well and described three fraction runners are located at
Described dynamic model, for channel-shaped, is located at the lower surface of described dynamic model；Described three fraction runners are perpendicular to described sub-runner；Described set up
Cold slug well is four, described in set up cold slug well equal apart from adjacent described sub-runner, described three fraction runners form square,
Described cold slug well of setting up is located at described foursquare apex.
The micro plastic mould being easy to produce the most according to claim 1, it is characterised in that: described sub-runner is a diameter of
3mm；The described two a diameter of 2mm of fraction runner.
The micro plastic mould being easy to produce the most according to claim 2, it is characterised in that: described cast gate is a length of
0.5mm, a diameter of 0.5mm of import department, a diameter of 0.3mm of discharging opening；On the basis of dynamic model lower surface, described gate depth is
0.32mm。
The micro plastic mould being easy to produce the most according to claim 3, it is characterised in that: the described cold slug well degree of depth is
6mm, described air discharge duct width is 4mm.
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