CN107972235A - A kind of injection mold and its injection molding forming method - Google Patents
A kind of injection mold and its injection molding forming method Download PDFInfo
- Publication number
- CN107972235A CN107972235A CN201711229183.4A CN201711229183A CN107972235A CN 107972235 A CN107972235 A CN 107972235A CN 201711229183 A CN201711229183 A CN 201711229183A CN 107972235 A CN107972235 A CN 107972235A
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- Prior art keywords
- pressure
- injection
- runner
- cavity
- fluid
- Prior art date
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- 238000002347 injection Methods 0.000 title claims abstract description 113
- 239000007924 injection Substances 0.000 title claims abstract description 113
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001746 injection moulding Methods 0.000 title claims abstract description 11
- 239000012530 fluid Substances 0.000 claims abstract description 76
- 239000011347 resin Substances 0.000 claims abstract description 63
- 229920005989 resin Polymers 0.000 claims abstract description 63
- 239000004033 plastic Substances 0.000 claims abstract description 59
- 229920003023 plastic Polymers 0.000 claims abstract description 59
- 239000000498 cooling water Substances 0.000 claims abstract description 18
- 230000007246 mechanism Effects 0.000 claims description 9
- 210000005239 tubule Anatomy 0.000 claims description 7
- 239000002991 molded plastic Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 239000000047 product Substances 0.000 description 50
- 238000005516 engineering process Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001360 synchronised effect Effects 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
- B29C45/1703—Introducing an auxiliary fluid into the mould
- B29C45/174—Applying a pressurised fluid to the outer surface of the injected material inside the mould cavity, e.g. for preventing shrinkage marks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—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
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3044—Bumpers
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 discloses a kind of injection mold and its injection molding forming method.Wherein, injection mold includes cover half, dynamic model, flow passage system, cooling water recirculation system, molten resin injection device, pressure application devices and fluid injection apparatus；Flow passage system is arranged in fixed half and moving half, and for forming runner, runner has multiple cast gates being connected with the cavity of injection mold；Cooling water recirculation system is arranged in fixed half and moving half, and after plastic product forming, injection cooling water is cooled and shaped plastic products.In injection, back side injecting fluid by runner towards plastic products, when injecting molten resin is into cavity, pressure is applied from injecting resin of the pressure application devices from cast gate into cavity, so that the pressure and fluid injection pressure that apply from cast gate are all lowered, in the case where two kinds of pressure are all low, the design surface of mechanograph is formed as desired surface configuration, and the pressure of pressurized equipment is low, so as to reduce the cost of injection mold.
Description
Technical field
The present invention relates to mould applications, more particularly to a kind of injection mold and its injection molding forming method.
Background technology
Injection mold is provided with cast gate and connects the cavity of cast gate.During molten resin is from gated injection to cavity.Work as injection
Molten resin when being solidified in cavity, opening mold, to be removed from the molds plastic products.
However, can be shunk during hardening of resin, when the molten resin having been filled with cavity is shunk in process of setting,
The outer shape of plastic products no longer matches the shape of cavity, it is impossible to plastic products is formed desired outer shape.
In order to solve this problem, during injection, continue when the molten resin in cavity is solidifying from cast gate
Molten resin into cavity applies pressure.That is, supplement is in order to compensate for contraction, required a certain number of meltings are set
Fat.Even if when molten resin is shunk, also it can prevent the outer shape of plastic products from being separated with mold cavity surface, so as to be had
The plastic products of promising outer shape.
Japanese patent application discloses H10-58493 and discloses the technology for substituting above-mentioned technology.The technology is conceived to following thing
It is real：Many plastic products have the surface (surface is known as " design surface ") that must be shaped to desirable shape and are shaped to not weigh
The surface wanted (surface is known as " back side ").In the prior art method, when completion is from cast gate to cavity filling molten resin
When, stop applying pressure to molten resin, pressure fluid is injected towards the back side of plastic products.When pressure fluid is towards plastics system
During the back side injection of product, the back side is separated with mold cavity surface, but the design surface of plastic products pushes mold cavity surface.Therefore, mould
The design surface of material products can be finish-machined to shape desired.But it should be explained that the technology does not require the tree of extra quantity
Fat, because stopping applying pressure from cast gate to molten resin when cavity fills with molten resin.
Excellent plastic products are formed in order to realize that continuation applies stressed technology from cast gate to molten resin, it is necessary to are continued
Apply high pressure.For example, in order to form bumper, it is necessary to continue that (region is remote to the stub area for occurring contraction problem
From cast gate) apply about 16MPa pressure.This to must continue to the pressure for being applied around about 40MPa in cast gate.Therefore,
The injection mold of bumper at least must be able to bear the pressure of 40MPa.This needs the injection mold of large and expensive.Even if working as makes
During with the technology that pressure fluid is injected towards the plastic products back side, it is also desirable to which high Fluid pressure forms excellent plastic products.
Above-mentioned Japanese patent application is disclosed in the technology of H10-58493, injects the pressure fluid of about 18MPa.Thus, injection mold is extremely
It must be able to bear the pressure of 18MPa less.This needs the injection mold of large and expensive.
Therefore, the prior art has yet to be improved and developed.
The content of the invention
The technical problem to be solved in the present invention is, for the drawbacks described above of the prior art, there is provided a kind of injection mold and
Its injection molding forming method, can reduce the pressure that must be applied to resin in cavity, reduce the resistance to pressure request of injection mold.
The technical solution adopted by the present invention to solve the technical problems is：
A kind of injection mold, for moulded plastic products, it includes cover half, dynamic model, flow passage system, cooling water circulation system
System；The flow passage system is arranged in fixed half and moving half, and for forming runner, the runner has the multiple and injection mold
The cast gate that is connected of cavity；The cooling water recirculation system is arranged in fixed half and moving half, after plastic product forming, note
Entering cooling water is cooled and shaped plastic products, and the injection mold further includes：
Molten resin injection device, for by molten resin from the gated injection to the cavity；
Pressure application devices, for after filling with molten resin in the cavity from the cast gate into the cavity
Injecting resin apply pressure；And
Fluid injection apparatus, applies pressure for the injecting resin at least in the pressure application devices into the cavity
Process at least a portion during, the back side injecting fluid by the runner towards plastic products, wherein：
The pressure that the pressure application devices apply is the design surface for being not enough to prevent the plastic products and the type
The separated pressure in surface of chamber, unless the fluid injection apparatus injecting fluid,
The Fluid pressure that the fluid injection apparatus applies is to be not enough to prevent design surface and the institute of the plastic products
The separated pressure in surface of cavity is stated, unless the pressure application devices apply pressure；
Pressure application devices are additionally operable to when molten resin injection is transformed into pressure holding, in the cavity near the cast gate
Pressure rapid decrease, and when starting pressure fluid injection, the pressure of the molten resin in the cavity is higher than pressure fluid
Pressure.
In the injection mold, the cover half includes the ejecting mechanism being made of thimble, ejection base plate and fixed plate, its
In,
Described thimble one end has an ejection face, the other end of the thimble wear be fixedly connected on after the fixed plate it is described
In ejection base plate, the fixed plate is fixedly connected with the ejection base plate, and the flow passage system is in institute with the ejecting mechanism
State the same side of plastic products.
In the injection mold, the flow passage system includes runner plate and one end and is docked respectively admittedly with the multiple cast gate
Fixed flow-path tube, wherein, the runner includes the runner that is formed respectively of each flow-path tube and with being recessed by the runner plate
The sprue being connected with the runner formed, the other end of the flow-path tube slideably wear the fixed plate, described
It is fixedly connected on after ejection base plate on the runner plate.
In the injection mold, the flow-path tube includes big pipe and the relatively described less tubule of big pipe of outside diameter, described
Big pipe forms a step surface towards the dynamic model side with the tubule junction, and the cover half has and the step surface phase
The bearing surface supported.
In the injection mold, the runner have seven be parallel to each other and the equally distributed runner and with institute
Corresponding seven cast gates of runner are stated, six runners therein are bisected into two groups, and the two components runner is in
Three fold rotational symmetry, the two components runner have the mirror symmetry planes in two parallel split-flow roads, and six runners also close
In another runner be in two fold rotational symmetry.
The injection mold, further includes the stop member for the opening for being arranged in the runner, which prevents described
Molten resin enters the runner by the opening.
A kind of injection molding forming method of injection mold, it includes the following steps：
Cover half and dynamic model are molded, cast gate is connected with cavity；
Molten resin is set to be noted successively after the sprue, runner by each multiple cast gates by molten resin injection device
The cavity is mapped to, to obtain the plastic products；By molten resin from the gated injection to the cavity；
The injecting resin of the pressure application devices from the cast gate into the cavity applies pressure；
Fluid injection apparatus is by the runner towards plastic products back side injecting fluid；
Cooling water recirculation system injection cooling water is cooled and shaped plastic products；
After the cover half and dynamic model die sinking, eject, disengage it from described from cover half side by the plastic products
Injection mold；Wherein,
The step of the step of pressure application devices application pressure and fluid injection apparatus injecting fluid, performs at the same time；
The pressure that the pressure application devices apply is the design surface for being not enough to prevent the plastic products and the type
The separated pressure in surface of chamber, unless the fluid injection apparatus injecting fluid；
The Fluid pressure that the fluid injection apparatus applies is to be not enough to prevent design surface and the institute of the plastic products
The separated pressure in surface of cavity is stated, unless the pressure application devices apply pressure；
Pressure application devices are additionally operable to when molten resin injection is transformed into pressure holding, in the cavity near the cast gate
Pressure rapid decrease, and when starting pressure fluid injection, the pressure of the molten resin in the cavity is higher than pressure fluid
Pressure.
It is described by after the cover half and dynamic model die sinking in the injection molding forming method of the injection mold, from fixed
The step of plastic products are ejected, disengage it from the injection mold by mould side includes：
Make the cover half with the dynamic model from mould；
The plastic products are ejected from cover half side by the thimble of ejecting mechanism.
Compared to the prior art, injection mold and its injection molding forming method provided by the invention, are arrived in injecting molten resin
When in cavity, pressure is applied from injecting resin of the pressure application devices from cast gate into cavity so that the pressure applied from cast gate
All it is lowered with fluid injection pressure, in the case where two kinds of pressure are all low, the design surface of mechanograph is formed as desired
Surface configuration, and the pressure of pressurized equipment is low, so as to reduce the cost of injection mold, makes the cost reduction of injecting products.
Brief description of the drawings
Below in conjunction with accompanying drawings and embodiments, the invention will be further described, in attached drawing：
Fig. 1 is the structure diagram of the injection mold of presently preferred embodiments of the present invention.
Fig. 2 is the dimensional structure diagram of runner shown in Fig. 1.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
It should be noted that when element is referred to as " being installed in ", " being fixed on " or " being arranged at " another element, it can be directly another
On one element or it may be simultaneously present centering elements.When an element is known as " being connected to " another element, it can
To be directly to another element or may be simultaneously present centering elements.It should also be noted that, the embodiment of the present invention
In the orientation term such as left and right, upper and lower, be only relative concept or using the normal operating condition of product as reference each other, and
It should not be regarded as restrictive.
Referring to Fig. 1, Fig. 1 is the structure diagram of the injection mold of presently preferred embodiments of the present invention.In the present embodiment, note
Mold is used for moulded plastic products, it includes cover half (non-label in figure), dynamic model 3, flow passage system 4, cooling water recirculation system.
Fixed half and moving half 3 formed injection mold cavity 1A, cavity 1A molding plastic products shapes and sizes phase
Matching.The flow passage system is arranged in fixed half and moving half 3, and for forming runner, the runner has the multiple and injection
The cast gate that the cavity of mould is connected, is injected by runner 4S and is full of cavity 1A.
The cooling water recirculation system is arranged in fixed half and moving half, and after plastic product forming, injection cooling water makes
Plastic products are cooled and shaped.
In the embodiment of the present invention, the injection mold further includes：
Molten resin injection device, for by molten resin from the gated injection to the cavity；
Pressure application devices, for after filling with molten resin in the cavity from the cast gate into the cavity
Injecting resin apply pressure；And
Fluid injection apparatus, applies pressure for the injecting resin at least in the pressure application devices into the cavity
Process at least a portion during, the back side injecting fluid (such as air) by the runner towards plastic products.
Wherein：
The pressure that the pressure application devices apply is the design surface for being not enough to prevent the plastic products and the type
The separated pressure in surface of chamber, unless the fluid injection apparatus injecting fluid,
The Fluid pressure that the fluid injection apparatus applies is to be not enough to prevent design surface and the institute of the plastic products
The separated pressure in surface of cavity is stated, unless the pressure application devices apply pressure；
Pressure application devices are additionally operable to when molten resin injection is transformed into pressure holding, in the cavity near the cast gate
Pressure rapid decrease, and when starting pressure fluid injection, the pressure of the molten resin in the cavity is higher than pressure fluid
Pressure.
In some currently preferred embodiments of the present invention, cover half is included by 213 groups of thimble 211, ejection base plate 212 and fixed plate
Into ejecting mechanism 21, as shown in Figure 1.Flow passage system 4 is in the same side of the plastic products, top with the ejecting mechanism 21
There is 211 one end of pin an ejection face 211A, the other end of thimble 211 to be fixedly connected on ejection bottom after wearing the fixed plate 213
On plate 212, fixed plate 213 is fixedly connected with ejection base plate 212.
Ejection base plate 212 when moving up and down, can synchronous drive thimble 211 plastic products of forming are ejected.Preferably
Ground, thimble 211 are fixed in ejection base plate 212 by fixed plate 213, and fixed plate 213 is connected by screw solid with ejection base plate 212
It is fixed, so that thimble 211 can be removed and installed easily.
Wherein, there is runner 4S multiple cast gate 4C, runner 4S to be connected by cast gate 4C with cavity 1A.Runner 4S in figure
It is parallel to each other with seven and equally distributed runner 4B and seven cast gate 4C corresponding with runner 4B, six therein
Runner 4B is bisected into two groups, and two component runner 4B are in three fold rotational symmetry, and two component runner 4B have two parallel split-flow roads
The mirror symmetry planes of 4B, six runner 4B are in two fold rotational symmetry also on another runner 4B.
Fig. 2 is please referred to, Fig. 2 is the dimensional structure diagram of runner shown in Fig. 1.It is preferred that flow passage system 4 includes
Fixed flow-path tube 42 is docked in one runner plate 41 and one end respectively with multiple cast gate 4C, and the other end of flow-path tube 42 is slideably
It is fixedly connected on after wearing fixed plate 213, ejection base plate 212 on runner plate 41；The runner plate 41 includes sprue 4A with dividing
Runner 4B, wherein, runner 4B is formed by flow-path tube 42, and by runner plate 41, depression is formed sprue 4A upwards.Sprue 4A with
The multiple flow-path tube 42 is connected.In injection, injected plastics material injects sprue 4A by feeding mouth, then by multiple shuntings
Road 4B, injects cavity 1A by cast gate 4C.
In other preferred embodiments, it is less that flow-path tube 42 includes a relatively large pipe 421 of big 421 and one outside diameter of pipe
Tubule 422, big pipe 421 form a step surface 42A with 422 junction of tubule, and cover half has an abutting to offset with step surface 42A
Face.The upper end of tubule 422 offers cast gate 4C, can be in cast gate 4C by adjusting the relative distance of step surface 42A and bearing surface
When concordant with the forming surface of dynamic model, step surface 42A offsets just with bearing surface, plays position-limiting action, can make molding plastics system
Inner surface of the product at cast gate 4C is as far as possible smooth.
Further, the back side of the cavity 1A also sets up some fluid passages 44, and fluid passage 44 connects fluid hose 38,
One end connection force (forcing) pump 42 of the fluid hose 38.The fluid given by force (forcing) pump 42 in fluid hose 38 pressurizes, and trandfer fluid.
Preferably, the solenoid valve 40 for adjusting fluid-flow rate and pressure is provided with fluid hose 38.Solenoid valve
The pressure of 40 air for supplying force (forcing) pump 43 is adjusted to 0.5MPa, specifically by controller (such as industrial personal computer) control solenoid valve 40
Opening degree, the pressure fluid that force (forcing) pump 43 conveys is adjusted to 0.5MPa by solenoid valve 40, then enters mainstream by fluid hose 38
In road 4A, enter back into runner 4B, cavity 1A is injected by cast gate 4C, it is achieved thereby that the control of fluid pressure, so as to carry
Product quality is risen.
Further, it is aperture that exhaust outlet (not shown in figure) exhausting-gas hole is provided with the fluid passage 44, aperture
Diameter do not allow molten resin by, but allow air pass through.
In certain embodiments, injection mold can also include multiple line positions, and mold insert 5 as shown in Figure 1 is installed in line position,
So as to the back-off part of moulded plastic products.
In addition, in the present invention, so-called " being fixedly connected " can also be general to be fixedly connected with mode or be integrally formed.Top
Go out bottom plate 212 to be driven by general driving device respectively with multiple line positions, such as servo-driver.
Further, injection mold of the invention further includes the stop member for the opening for being arranged in the runner, the stopping
Part prevents the molten resin from entering the runner by the opening.
The present invention provides a kind of injection molding forming method of injection mold, it includes：
S1, mold cover half and dynamic model, cast gate is connected with cavity；
S2, made by molten resin injection device molten resin multiple be poured by each after the sprue, runner successively
Mouth is expelled to the cavity, to obtain the plastic products；By molten resin from the gated injection to the cavity；
The injecting resin of S3, pressure application devices from the cast gate into the cavity applies pressure；
S4, fluid injection apparatus are by the runner towards plastic products back side injecting fluid；
S5, cooling water recirculation system injection cooling water are cooled and shaped plastic products；
S6, after molding the cover half and the dynamic model, eject from cover half side by the plastic products, disengage it from institute
State injection mold；
Wherein：
The step of the step of pressure application devices application pressure and fluid injection apparatus injecting fluid, performs at the same time；
The pressure that the pressure application devices apply is the design surface for being not enough to prevent the plastic products and the type
The separated pressure in surface of chamber, unless the fluid injection apparatus injecting fluid；
The Fluid pressure that the fluid injection apparatus applies is to be not enough to prevent design surface and the institute of the plastic products
The separated pressure in surface of cavity is stated, unless the pressure application devices apply pressure；
Pressure application devices are additionally operable to when molten resin injection is transformed into pressure holding, in the cavity near the cast gate
Pressure rapid decrease, and when starting pressure fluid injection, the pressure of the molten resin in the cavity is higher than pressure fluid
Pressure.
Further, the step S6 is further included：
S61, make the cover half with the dynamic model from mould；
S62, by the thimble of ejecting mechanism ejected the plastic products from cover half side.
In conclusion by when injecting molten resin is into cavity, from pressure application devices from cast gate into cavity
Injecting resin applies pressure so that the pressure and fluid injection pressure applied from cast gate is all lowered, all low in two kinds of pressure
In the case of, the design surface of mechanograph is formed as desired surface configuration, and the pressure of pressurized equipment is low, so as to reduce
The cost of injection mold, makes the cost reduction of injecting products.
The embodiment of the present invention is described above in conjunction with attached drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, those of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make very much
Form, these are belonged within the protection of the present invention.
Claims (8)
1. a kind of injection mold, for moulded plastic products, it includes cover half, dynamic model, flow passage system, cooling water recirculation system；
The flow passage system is arranged in fixed half and moving half, and for forming runner, the runner has multiple and the injection mold
The cast gate that cavity is connected；The cooling water recirculation system is arranged in fixed half and moving half, after plastic product forming, injection
Cooling water is cooled and shaped plastic products, it is characterised in that the injection mold further includes：
Molten resin injection device, for by molten resin from the gated injection to the cavity；
Pressure application devices, for the note after filling with molten resin in the cavity from the cast gate into the cavity
Penetrate resin and apply pressure；And
Fluid injection apparatus, stressed mistake is applied for the injecting resin at least in the pressure application devices into the cavity
During at least a portion of journey, the back side injecting fluid by the runner towards plastic products, wherein：
The pressure that the pressure application devices apply is the design surface for being not enough to prevent the plastic products and the cavity
The separated pressure in surface, unless the fluid injection apparatus injecting fluid,
The Fluid pressure that the fluid injection apparatus applies is the design surface for being not enough to prevent the plastic products and the type
The separated pressure in surface of chamber, unless the pressure application devices apply pressure；
Pressure application devices are additionally operable to when molten resin injection is transformed into pressure holding, the cavity pressure near the cast gate
Rapid decrease, and when starting pressure fluid injection, the pressure of the molten resin in the cavity is higher than the pressure of pressure fluid
Power.
2. injection mold according to claim 1, it is characterised in that the cover half is included by thimble, ejection base plate with consolidating
The ejecting mechanism of fixed board composition, wherein,
Described thimble one end has an ejection face, and the other end of the thimble is fixedly connected on the ejection after wearing the fixed plate
On bottom plate, the fixed plate is fixedly connected with the ejection base plate, and the flow passage system is in the modeling with the ejecting mechanism
The same side of material products.
3. injection mold according to claim 2, it is characterised in that the flow passage system includes runner plate and one end and institute
State multiple cast gates and dock fixed flow-path tube respectively, wherein, the runner includes the runner that each flow-path tube is formed respectively
And with the sprue being connected with the runner that is formed of being recessed by the runner plate, the other end of the flow-path tube is slideably
It is fixedly connected on after wearing the fixed plate, the ejection base plate on the runner plate.
4. injection mold according to claim 3, it is characterised in that it is relatively described that the flow-path tube includes big pipe and outside diameter
Less tubule is managed greatly, and the big pipe forms a step surface towards the dynamic model side with the tubule junction, described fixed
Mould has the bearing surface to offset with the step surface.
5. injection mold according to claim 4, it is characterised in that the runner has seven and is parallel to each other and uniformly divides
The runner of cloth and seven cast gates corresponding with the runner, six runners therein are bisected into two
Group, the two components runner are in three fold rotational symmetry, and the two components runner has the mirror symmetry planes in two parallel split-flow roads,
Six runners are in two fold rotational symmetry also on another runner.
6. injection mold according to claim 1, it is characterised in that further include stopping for the opening that is arranged in the runner
Stop member, the stop member prevent the molten resin from entering the runner by the opening.
7. a kind of injection molding forming method of injection mold as claimed in claim 1, it is characterised in that include the following steps：
Cover half and dynamic model are molded, cast gate is connected with cavity；
By molten resin injection device make molten resin successively after the sprue, runner by each multiple gated injections to
The cavity, to obtain the plastic products；By molten resin from the gated injection to the cavity；
The injecting resin of the pressure application devices from the cast gate into the cavity applies pressure；
Fluid injection apparatus is by the runner towards plastic products back side injecting fluid；
Cooling water recirculation system injection cooling water is cooled and shaped plastic products；
After the cover half and dynamic model die sinking, ejected from cover half side by the plastic products, disengage it from the injection
Mould；Wherein,
The step of the step of pressure application devices application pressure and fluid injection apparatus injecting fluid, performs at the same time；
The pressure that the pressure application devices apply is the design surface for being not enough to prevent the plastic products and the cavity
The separated pressure in surface, unless the fluid injection apparatus injecting fluid；
The Fluid pressure that the fluid injection apparatus applies is the design surface for being not enough to prevent the plastic products and the type
The separated pressure in surface of chamber, unless the pressure application devices apply pressure；
Pressure application devices are additionally operable to when molten resin injection is transformed into pressure holding, the cavity pressure near the cast gate
Rapid decrease, and when starting pressure fluid injection, the pressure of the molten resin in the cavity is higher than the pressure of pressure fluid
Power.
8. the injection molding forming method of injection mold according to claim 7, it is characterised in that it is described by the cover half with
After dynamic model die sinking, the step of from cover half side ejecting, disengage it from the injection mold plastic products, includes：
Make the cover half with the dynamic model from mould；
The plastic products are ejected from cover half side by the thimble of ejecting mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711229183.4A CN107972235A (en) | 2017-11-29 | 2017-11-29 | A kind of injection mold and its injection molding forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711229183.4A CN107972235A (en) | 2017-11-29 | 2017-11-29 | A kind of injection mold and its injection molding forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107972235A true CN107972235A (en) | 2018-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711229183.4A Pending CN107972235A (en) | 2017-11-29 | 2017-11-29 | A kind of injection mold and its injection molding forming method |
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| CN (1) | CN107972235A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109501142A (en) * | 2018-12-25 | 2019-03-22 | 创意塑胶工业（苏州）有限公司 | A kind of injection molding process of abnormal workpieces |
| CN116985346A (en) * | 2023-09-25 | 2023-11-03 | 苏州技赛模具科技有限公司 | Injection mold capable of reducing injection molding material loss |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1964829A (en) * | 2004-06-08 | 2007-05-16 | 丰田自动车株式会社 | Injection molding method and injuction molding apparatus |
| CN104890186A (en) * | 2014-03-06 | 2015-09-09 | 群达塑胶电子（深圳）有限公司 | Injection mold and molding method |
| CN205167480U (en) * | 2015-12-08 | 2016-04-20 | 苏州源硕精密模具有限公司 | Controllable injection mold of pressure |
| CN105904646A (en) * | 2016-04-08 | 2016-08-31 | 天津大学 | Cavity gas pressure dynamic control-based micro injection molding apparatus and method thereof |
-
2017
- 2017-11-29 CN CN201711229183.4A patent/CN107972235A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1964829A (en) * | 2004-06-08 | 2007-05-16 | 丰田自动车株式会社 | Injection molding method and injuction molding apparatus |
| CN104890186A (en) * | 2014-03-06 | 2015-09-09 | 群达塑胶电子（深圳）有限公司 | Injection mold and molding method |
| CN205167480U (en) * | 2015-12-08 | 2016-04-20 | 苏州源硕精密模具有限公司 | Controllable injection mold of pressure |
| CN105904646A (en) * | 2016-04-08 | 2016-08-31 | 天津大学 | Cavity gas pressure dynamic control-based micro injection molding apparatus and method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109501142A (en) * | 2018-12-25 | 2019-03-22 | 创意塑胶工业（苏州）有限公司 | A kind of injection molding process of abnormal workpieces |
| CN116985346A (en) * | 2023-09-25 | 2023-11-03 | 苏州技赛模具科技有限公司 | Injection mold capable of reducing injection molding material loss |
| CN116985346B (en) * | 2023-09-25 | 2024-01-05 | 苏州技赛模具科技有限公司 | Injection mold capable of reducing injection molding material loss |
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Application publication date: 20180501 |