CN108778671A - Coinjection molding apparatus - Google Patents
Coinjection molding apparatus Download PDFInfo
- Publication number
- CN108778671A CN108778671A CN201780015665.1A CN201780015665A CN108778671A CN 108778671 A CN108778671 A CN 108778671A CN 201780015665 A CN201780015665 A CN 201780015665A CN 108778671 A CN108778671 A CN 108778671A
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- China
- Prior art keywords
- sprue
- metal mold
- forming part
- cavity
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000465 moulding Methods 0.000 title claims abstract description 39
- 229910052751 metal Inorganic materials 0.000 claims abstract description 131
- 239000002184 metal Substances 0.000 claims abstract description 131
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 239000011347 resin Substances 0.000 abstract description 39
- 229920005989 resin Polymers 0.000 abstract description 39
- 238000002347 injection Methods 0.000 abstract description 18
- 239000007924 injection Substances 0.000 abstract description 18
- 208000015943 Coeliac disease Diseases 0.000 description 133
- 229920001971 elastomer Polymers 0.000 description 16
- 239000000806 elastomer Substances 0.000 description 16
- 230000017525 heat dissipation Effects 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 239000004020 conductor Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 230000003321 amplification Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005491 wire drawing Methods 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
- B29C45/27—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
- B29C45/32—Moulds having several axially spaced mould cavities, i.e. for making several separated articles
Abstract
A kind of Coinjection molding apparatus is provided, in the injection (mo(u)lding) machine for the sprue being connected to by these cavities with the first cavity, the second cavity, the diameter of sprue can be increased, and can cure in a short time, cut off molten resin in sprue.Coinjection molding apparatus (10) has with the first metal mold (16) for the state arranged opposite that can be approached and detach and the second metal mold (24) and the intermetallic metal mould (20) being configured between the first metal mold (16) and the second metal mold (24).It, can be to the first cavity (202a) being formed between the first metal mold (16) and intermetallic metal mould (20), the second cavity (202b) being formed between the second metal mold (24) and intermetallic metal mould (20) and the interior filling melted material of sprue (204) that is interior positioned at the intermetallic metal mould (20) and being connected to the first cavity (202a) with the second cavity (202b) under mold closing state.In intermetallic metal mould (20), it is provided with and has sprue (204) in inside and can be in the sprue forming part (38,40) that die sinking side shifts up.The high material of material that sprue forming part (38,40) is made of the first metal mold (16) and the second metal mold (24) thermal conductivity ratio is constituted.
Description
Technical field
The present invention relates to a kind of Coinjection molding apparatus for the metal mold for having and capable of being molded two naval stores simultaneously.
Background technology
As the injection (mo(u)lding) machine for being molded more than two naval stores (molded product) simultaneously, it is known that have and be referred to as folding
The Coinjection molding apparatus of the metal mold of layer mold (lap siding mold).This Coinjection molding apparatus is configured to：It typically is provided with fixation
Metal mold, movable metal mold and the intermetallic metal mould being disposed between them, under mold closing state, in fixed metal mold and centre
The first cavity is formed between metal mold, and the second cavity is movably formed between metal mold and intermetallic metal mould.As this note
Molding machine is penetrated, is had by the way that the melting tree in the first cavity will be injected via the sprue (cold pouring channel) for being formed in intermetallic metal mould
Fat (melted material) is supplied to second type intracavitary and is molded the device of desired molded product.
However, in this case, molding first molded product and molding second in the second cavity in the first cavity
Molded product is connected by the relay being solidified to form by the molten resin in sprue, it is therefore desirable to cut off the relay.
Technology as cut-out relay, it is known that following technology：Sprue is formed as contracting with towards the first cavity
Diameter is taper, utilizes the coupling part (accumulating minimum part in relay middle section) of mould opening force cut-out relay and the first molded product
(referring to patent document 1).But in the technology described in patent document 1, in die sinking, need to make the cut-out power of relay small
In the first molded product relative to fixed metal mold by shrinking the adhesion strength generated.Therefore, according to the sectional area of relay or molten
Melt the material of material, the first molded product demoulds in the state of not cutting off relay from fixed metal mold sometimes.In addition, by
Melted material is securely fed to the second cavity in needs, therefore there are the limit for the undergauge of sprue.
Therefore, in order to solve this problem, it is proposed that have the Coinjection molding apparatus of cutting mechanism, which is used for
The relay that cut-out is solidified to form due to the melted material in sprue in die sinking (with reference to patent document 2).
Existing technical literature
Patent document
Patent document 1：Japanese Unexamined Patent Publication 2004-66728 bulletins
Patent document 1：Japanese Unexamined Patent Publication 2013-141777 bulletins
Invention content
Problems to be solved by the invention
However, in Coinjection molding apparatus described in patent document 2, it is contemplated that the cuttability of above-mentioned relay needs to make
Molten resin in sprue cures sufficiently, in particular, in order to cure in a short time, needs the diameter for reducing sprue.
As a result, there are the following problems：In order to which the cavity relative to that side for being merely able to fill by sprue is (in above-mentioned example
In be the second cavity) meet sufficient fillibility, the size for capableing of molding workpiece is restricted.
The present invention is to complete in view of the above problems, its purpose is to provide a kind of Coinjection molding apparatus,
In the injection (mo(u)lding) machine for the sprue being connected to by these cavities with the first cavity, the second cavity, sprue can be increased
Diameter, and can cure in a short time, cut off molten resin in sprue.
Means for solving the problems
The Coinjection molding apparatus of the present invention, have the first metal mold of state arranged opposite can approach and detach and
Second metal mold and the intermetallic metal mould being configured between first metal mold and second metal mold, in mold closing shape
Under state, can to the first cavity being formed between first metal mold and the intermetallic metal mould, be formed in described second
The second cavity between metal mold and the intermetallic metal mould and in the intermetallic metal mould and by first cavity
Melted material is filled in the sprue being connected to second cavity, it is characterised in that：In the intermetallic metal mould, it is provided with
Has the sprue and can be in the sprue forming part that die sinking side shifts up in inside, the sprue forming part is by leading
The high material of material that hot coefficient ratio constitutes first metal mold and second metal mold is constituted.
In the Coinjection molding apparatus of the present invention, it is formed in inside and has sprue and can be on die sinking direction with respect to position
The thermal conductivity ratio of the material of a pair of of sprue forming part of shifting constitutes the heat conduction of the material of the first metal mold and the second metal mold
Coefficient is high.Thereby, it is possible to realize heat dissipation capacity of the molten resin out of sprue by sprue forming part to intermetallic metal mould
Increase, and then realize the raising of the cooling efficiency of the molten resin.Therefore, even if the situation bigger in sprue diameter
Under, molten resin can be also cured sufficiently in a short time.Then, when being molded, the sprue forming part phase of a side
Sprue forming part relative displacement for another party, therefore cured resin (relay) in sprue can be breaking at.Separately
Outside, since sprue diameter can be increased, cavity of the molten resin to that side filled via sprue can be improved
Fillibility.
In the Coinjection molding apparatus of the present invention, the sprue forming part is arranged by being disposed in the intermetallic metal mould
Through hole in and can die sinking direction on relative displacement first part and second part constitute, the first part
It abuts and fixes in the through hole, the second part can abut in which shift up in the through hole in die sinking side,
And having the force application component to exert a force to the second part on die sinking direction, the first part is relative to the through hole
The contact area of inner wall is preferably greater than contact area of the second part relative to the inner wall of the through hole.If such structure
At then in die sinking, the second part of sprue forming part is exerted a force by force application component, can be readily switched off in sprue solid
The resin of change.Moreover, because abutting fixed first part in through hole does not have a force application component, thus in the straight of both sides
The case where force application component is arranged in running channel forming part is compared, can increase the sprue that is made of the higher material of thermal coefficient at
The contact area of the volume in type portion, the inner wall relative to the through hole is that first part is bigger than second part.Therefore, it is possible to
Improve radiating efficiency.
Description of the drawings
Fig. 1 is the partial sectional view of the mold closing state for the Coinjection molding apparatus for indicating an embodiment of the invention.
Fig. 2 is the partial sectional view for the die opening state for indicating Coinjection molding apparatus shown in Fig. 1.
Fig. 3 is the partial sectional view that amplification indicates the major part of injection (mo(u)lding) machine shown in Fig. 1.
Fig. 4 is the flow chart for the molding flow for indicating to execute in the Coinjection molding apparatus.
Fig. 5 is that melting is filled in the first cavity and the second cavity for indicating to be formed in Coinjection molding apparatus shown in Fig. 1
The partial sectional view of state after resin.
Fig. 6 is the office that amplification indicates the state after relay is cut off in the die sinking of Coinjection molding apparatus shown in fig. 5
Portion's sectional view.
Fig. 7 is the partial sectional view for indicating the state after the completion of the die sinking of Coinjection molding apparatus.
Fig. 8 is the partial sectional view for indicating to take out the state of the first molded product and the second molded product from Coinjection molding apparatus.
Specific implementation mode
Hereinafter, being illustrated to the Coinjection molding apparatus 10 of an embodiment of the invention with reference to attached drawing.This embodiment party
Coinjection molding apparatus 10 involved by formula is the Coinjection molding apparatus for having the so-called metal mold for being referred to as laminated mould.Such as figure
Shown in 1, Coinjection molding apparatus 10 has fixed metal mold 16, movable metal mold 24 and the intermediate gold being disposed between them
Belong to mould 20.Also, under mold closing state, by the first cavity being formed between fixed metal mold 16 and intermetallic metal mould 20
Molten resin (melting material is filled in 202a and the second cavity 202b being formed between movable metal mold 24 and intermetallic metal mould 20
Material), it can be molded more than two naval stores (molded product) simultaneously.
Specifically, as shown in Figures 1 and 2, Coinjection molding apparatus 10 has：Fixed disk 12；More (such as four) draw
Bar 14 is fixed on each corner of fixed disk 12, and extends along the thickness direction of fixed disk 12；Fixed metal mold (the first metal
Mould) 16, it is fixed on fixed disk 12；Injection mechanism 18, setting is on fixed metal mold 16；Intermetallic metal mould 20, with
The opposite mode of fixed metal mold 16, is movably supported relative to multiple pull rods 14；Movable metal mold (the second metal
Mould) 24, it is being disposed in intermetallic metal mould 20 with fixed 16 opposite side of metal mold；Movable plate 26 is fixed on movable metal
Mould 24, and be movably supported relative to multiple pull rods 14；And control unit 28.
In Fig. 1, the left side of fixed disk 12 is fixed in the right side of fixed metal mold 16.The left side of fixed metal mold 16
Face forms first as molten resin flow path (branch) under mold closing state between the right side of intermetallic metal mould 20
The first cavity 202a of runner 200a and molding space as naval stores.First flow 200a is for will be from injection mechanism
Molten resin derived from 18 is oriented to the flow path of the first cavity 202a.
Injection mechanism 18 has with the injection part 30 (referring to Fig.1) of authorized pressure injecting molten resin, is arranged to perforation admittedly
The introduction part 32 of price fixing 12 and the spray nozzle part 34 for being set to the inside of fixed metal mold 16 and linking with the introduction part 32.
The front end face of spray nozzle part 34 is exposed to the left side of fixed metal mold 16.The resin stream being formed in inside spray nozzle part 34
Road is connected to first flow 200a.That is, the molten resin injected from injection part 30 is guided via introduction part 32 and spray nozzle part 34
To first flow 200a.
Intermetallic metal mould 20 is connect by unshowned stretching connecting rod with movable metal mold 24.As a result, when being molded,
Only by making movable metal mold 24 be moved to the side opposite with the side residing for fixed metal mold 16, it will be able to make intermetallic metal
Mould 20 is detached from both fixed metal mold 16 and movable metal mold 24.
The through hole 36 extended along its thickness direction is formed on intermetallic metal mould 20.Through hole 36 is respectively in intermediate gold
Belong to the right side (the opposite face with fixed metal mold 16) of mould 20 and the left side of intermetallic metal mould 20 (with 24 phase of movable metal mold
To face) on be open.
The left side of intermetallic metal mould 20 forms between the right side of movable metal mold 24 and makees under mold closing state
Second flow channel 200b for molten resin flow path (branch) and the second cavity 202b as naval stores molding space.Second
Road 200b is the flow path for the molten resin derived from the aftermentioned sprue 204 to be oriented to the second cavity 202b.
As shown in figure 3, have in the through hole 36 can on die sinking direction relative displacement a pair of of sprue forming part
38 (first parts) and 40 (second parts) and the elastomer (force to exert a force to sprue forming part 40 on die sinking direction
Component) 42." die sinking direction " is the direction for instigating 40 relative separation of first part 38 and second part.Therefore, 42 edge of elastomer
Direction pair the second sprue forming part 40 far from the first sprue forming part 38 exerts a force.In addition, in the movable gold of through hole 36
The end for belonging to 24 side of mould is equipped with retainer 46, prevents sprue forming part 40 from through hole 36 by the force of elastomer 42
It falls off.
The endoporus 52 of sprue forming part 38 is formed as with the other end towards sprue forming part 38 and gradual undergauge
Bellmouth.The length dimension of sprue forming part 38 is set to pass through (along the size of 38 axis direction of sprue forming part)
The substantially half of the length dimension (along the size of 36 extending direction of through hole) of through-hole 36.The peripheral surface of sprue forming part 38
With the internal face sliding contact for constituting through hole 36.In addition, sprue forming part 38 is fixed in through hole 36, though into
It will not be to die sinking direction displacement in the case of row die sinking.
Sprue forming part 40 and above-mentioned sprue forming part 38 are slightly different, including are formed as cylindric sprue
Forming part main body 54 and 24 side of movable metal mold on the axis direction of sprue forming part main body 54 are formed in outside it
The flange part 56 of circumferential surface.The length dimension of sprue forming part main body 54 is set to substantially the one of the length dimension of through hole 36
Half.The endoporus 58 of sprue forming part main body 54 is formed as gradually contracting with towards one end of the sprue forming part main body 54
The bellmouth of diameter.The peripheral surface of flange part 56 and the internal face sliding contact for constituting through hole 36.
Above sprue forming part 38,40 constitutes fixed metal mold 16 and movable metal mold 24 by thermal conductivity ratio
The high material of material (hereinafter referred to as " high heat conductive material ") is constituted.The high heat conductive material refers to that thermal coefficient is
The material of 150W/mk or more, such as copper alloy (BeCu), aluminium alloy, nickel chromium triangle copper alloy can be enumerated etc..Since sprue is molded
Portion 38,40 is made of high heat conductive material, therefore the heat of the molten resin after filling is easy to pass through sprue forming part 38,40
It is dissipated to intermetallic metal mould 20, the resin solidification can be made in a short time.Further, it is possible to make near sprue central part
Molten resin cures in a short time, when sprue is cut off when die sinking, can inhibit the phenomenon that the hair of fritting melt resin wire drawing
It is raw.That is, can be molded in a short time, molding cycle time can be shortened.
Wherein, in sprue, the part to be cut off after solidification (relay) possesses heat, as theoretical formula by following
Formula indicate.
Relay possesses heat=specific heat capacity × weight × temperature difference
" specific heat capacity " is the specific heat capacity of resin, and " weight " is all resins in sprue (from one end of sprue to another
The resin of one end) weight, " temperature difference " is the temperature difference of cooling front and back resin.
On the other hand, the heat dissipation capacity in relay is indicated as theoretical formula by formula below.
Heat dissipation capacity=thermal coefficient/thickness × temperature difference × metal mold contact area × time
" thermal coefficient " is the thermal coefficient of the material of sprue forming part 38,40, " thickness " be sprue forming part 38,
40 thickness, " metal mold contact area " are the surface areas in sprue, and " time " is cycle time (from when being injected into die sinking
Between).
In order to make the molten resin in relay fully cure, as long as meeting " the possessing heat of relay "≤" relay
Heat dissipation capacity ".Moreover, in above-mentioned formula, in the case where determining the time, only thermal coefficient and metal mold surface area is
Unknown number.Therefore, in the case where wanting to be molded with the specific time, as long as thermal coefficient and metal mold surface area are set
It is set to and meets above-mentioned formula.That is, in the case where wanting to be molded in the short time, in order to meet above-mentioned formula, as long as increasing
Any of thermal coefficient and metal mold surface area.Therefore, in the present invention, for the heat conduction system of sprue forming part
Number, is provided as described above.
On the other hand, in order to increase metal mold surface area, preferably make sprue forming part 38 endoporus 52 and sprue at
Endoporus 58, the cross sectional shape i.e. orthogonal with the length direction of sprue 204 in type portion 40 are oblong shape, elliptical shape, star
The non-circular shapes such as shape.It is the non-circular shape with cross sectional shape when it is non-circular shape to make the cross sectional shape of sprue 204
The case where inscribed circle of shape, is compared, and the surface area in sprue becomes larger.In turn, as described above, can be carried out in shorter time
It is cooling, the solidification of resin in sprue can be carried out in a short time.It is further preferred, that the diameter of sprue forming part 38,40
It is in thickness in 50% or more range of the minimum diameter of sprue 204.
The elastomer 42 for being set to sprue forming part 40 exerts a force to sprue forming part 40 along die sinking direction.Change speech
It, elastomer 42 can exert a force to sprue forming part 40 to the side residing for movable metal mold 24.As elastomer 42, such as
Use spiral compression spring.In addition, since elastomer not being arranged in sprue forming part 38, thus its volume ratio sprue at
The big corresponding amount in type portion 40.Therefore, the heat dissipation effect that high heat conductive material is brought is more preferable, contributes to the cooling of short time.That is,
By the way that elastomer only is arranged in the sprue forming part of a side, heat dissipation effect can be further increased.
It,, can be to can as shown in Fig. 2, by the force of elastomer 42 under die opening state by above such structure
Dynamic 24 direction of metal mold exerts a force to sprue forming part 40, and a pair of of sprue forming part 38,40 is separated from each other.That is, sprue at
The one end in type portion 38 is prominent from through hole 36 to 24 side of movable metal mold.
On the other hand, under mold closing state, as shown in figure 3, under 42 compressed state of elastomer, sprue forming part
38 left side is contacted with the right side of sprue forming part 40, as a result, the endoporus 52 Yu sprue of sprue forming part 38 at
The endoporus 58 in type portion 40 is connected to.That is, under mold closing state, pass through the endoporus 52 and sprue forming part 40 of sprue forming part 38
Endoporus 58, the sprue (cold pouring channel) 204 as molten resin flow path can be formed.
In addition, since the endoporus 52 of sprue forming part 38 is directed towards the bellmouth of the gradual undergauge of its left end side, and it is straight
The endoporus 58 of running channel forming part 40 is directed towards the bellmouth of its gradual undergauge in right end side, therefore, in the sprue 204,
Reducing diameter part 206 is formed on the part that a pair of of sprue forming part 38,40 contacts.
Control unit 28 have drive control injection part 30 injection control unit 62 and drive control movable plate 26 it is movable
Dish driving control unit 64.
The Coinjection molding apparatus of present embodiment is substantially constituted as described above, then, to having used the injection moulding
The injection molding forming method of device 10 illustrates.In addition, in the following description, using die opening state as original state.
First, start mold closing and act (Fig. 4/step 1).That is, movable plate drive control part 64 drives movable plate 26 and makes it
It is moved to 20 side of intermetallic metal mould.
Then, if keeping movable plate 26 further mobile, a pair of of sprue forming part 38,40 one side are along close to each other
The 42 one side displacement of direction (mold closing direction) compresses elastomeric (Fig. 4/step 2), until sprue forming part 38 other end with
The end face of sprue forming part main body 54 contacts.The endoporus 52 of sprue forming part 38 and sprue forming part main body as a result,
54 endoporus 58 is connected to and forms sprue 204 (with reference to Fig. 3).In turn, a face of movable metal mold 24 and sprue at
After the other end contact in type portion 40 (contact site is not shown), movable metal mold 24 and intermetallic metal mould 20 be integrally formed and to
Side movement residing for fixed metal mold 16, to another face of the end face and fixed metal mold 16 of sprue forming part 38
It contacts (contact site is not shown).
Then, when completing mold closing action, (Fig. 4/step 3) is formed between fixed metal mold 16 and intermetallic metal mould 20
First flow 200a and the first cavity 202a, and form second flow channel between intermetallic metal mould 20 and movable metal mold 24
200b and the second cavity 202b (referring to Fig.1).In addition, the resin flow path in spray nozzle part 34 is connected to first flow 200a, directly pour
Road 204 is connected to first flow 200a and second flow channel 200b.
Hereafter, injection control unit 62 drives injection part 30, and the melting of the authorized pressure of specified amount is injected from the injection part 30
Resin (Fig. 4/step 4).Then, the molten resin injected from injection part 30 is directed to spray nozzle part 34 via introduction part 32, and
By injection first flow 200a.
The molten resin for being injected into first flow 200a is directed to the first cavity 202a and sprue 204.It is directed to
The molten resin of sprue 204 is directed to the second cavity 202b via second flow channel 200b.As a result, to first flow 200a,
First cavity 202a, sprue 204, second flow channel 200b and second cavity 202b filling molten resins (Fig. 4/step 5).
Then, the molten resin of filling is cured into (Fig. 4/step 6).It is molded in first flow 200a respectively as a result,
One branch 300a is molded the first molded product 302a in the first cavity 202a, the second branch is molded in second flow channel 200b
Portion 300b is molded the second molded product 302b in the second cavity 202b, and relay 304 is molded in sprue 204 (with reference to figure
5).In addition, at this point, being shunk caused by curing due to molten resin, the first molded product 302a is adhered on fixed metal mold 16, the
Two molded product 302b are adhered on movable metal mold 24.In addition, since sprue forming part 38,40 is by high heat conductive material structure
At, therefore thermal diffusivity is good, can cure in a short time.
Then, start die sinking action (Fig. 4/step 7).That is, movable plate drive control part 64 drives movable plate 26 so that can
Dynamic metal mold 24 is moved to the side opposite with fixed 16 place side of metal mold.Then, due in each sprue forming part 38,40
Upper effect has the force (elastic force) of the elastomer 42 along die sinking direction, therefore acts on and having along die sinking side in relay 304
To tensile load.Product minimum reducing diameter part in 304 middle section of relay is (corresponding with the reducing diameter part 206 of sprue 204 as a result,
Part) 306 cut-off (fractures) (with reference to Fig. 4/step 8, Fig. 6).
Moreover, sprue forming part 40 by the force of elastomer 42 along die sinking direction displacement, flange part 56 and one
Each retainer 46 being fixed on to body on intermetallic metal mould 20 abuts.Then, by keeping movable plate 26 further mobile, with second
The relay 304 of branch 300b connections is left from the inner peripheral surface of sprue forming part main body 54, then, passes through unshowned drawing
Stretch connecting rod by the intermetallic metal mould 20 being connect with movable metal mold 24 to 24 side stretching of movable metal mold, as a result, with first point
The relay 304 of branch 300a connections is left from the inner peripheral surface of sprue forming part 38.Then, die sinking action is completed (with reference to figure
4/ step 9, Fig. 7).
Then, the first molded product 302a and second molded product 302b (Fig. 4/step 10) is taken out.That is, as shown in figure 8, logical
It crosses in the state that holding part 100 grasped the first molded product 302a, the knock pin 102 by being set to fixed metal mold 16 will
First molded product 302a (the first branch 300a) is pushed to 20 side of intermetallic metal mould, and is grasped by holding part 104
In the state of second molded product 302b, by being set to the knock pin 106 of movable metal mold 24 by the second molded product 302b (
Two branch 300b) it is pushed to 20 side of intermetallic metal mould.At this stage, terminate the injection moulding method involved by present embodiment
The step of.
According to the present embodiment, in due to being cut off by exerting a force to sprue forming part 40 along die sinking direction in die sinking
After portion 30, therefore even if not reducing the sectional area of the reducing diameter part 206 (reducing diameter part 306 of relay 304) of sprue 204 excessively,
Also relay 304 can be assuredly shut off.That is, can increase the diameter of sprue 204, thereby, it is possible to the first cavity 202a
And second cavity 202b fully supply molten resin, and easily can take out the first molded product from intermediate metal mold 20
302a and the second molded product 302b.
In addition, in present embodiment, in mold closing process, a pair of of sprue is set to be molded while so that elastomer 42 is compressed
Portion 38,40 is close, to make the other end of sprue forming part 38 be abutted with the end face of sprue forming part main body 54, because
This can make the force along die sinking direction of elastomer 42 act on each sprue forming part 38,40 in die sinking.As a result,
Relay 304 is acted on along the tensile load in die sinking direction, therefore can be automatic and be appropriately cut off the relay 304.
In the present embodiment, by the way that the endoporus 52,58 of each sprue forming part 38,40 is formed as bellmouth, to
The reducing diameter part 206 of sprue 204 is formed in the contact site of a pair of of sprue forming part 38,40.Thereby, it is possible to make elastomer 42
Force efficiently acts on the reducing diameter part 306 of relay 304, to more easily cut off the relay 304.
In addition, due to (being detached from the first branch 300a and the second branch 300b at the intermediate position of relay 304
Position) reducing diameter part 306 is formed, therefore when the reducing diameter part of the relay 304 306 is cut off, can suitably inhibit the first molding
Product 302a, the second molded product 302b are damaged.
According to the present embodiment, sprue forming part 40 is prevented to be detached from from through hole 36 by the way that retainer 46 is arranged, because
This can easily take out relay 304 from sprue forming part 38,40 in molding process.In addition, due to being not necessarily to
A pair of of sprue forming part 38,40 is arranged in through hole 36 when being injection moulded every time, therefore can realize and be injected into
The shortening of the cycle time of type.
Coinjection molding apparatus 10 involved by present embodiment is not limited to above-mentioned structure.Sprue forming part 38
Endoporus 52 is not limited to be formed as the example of bellmouth, for example, it is also possible to positioned at the one of 38 left end of sprue forming part
Determine the large diameter hole of the diameter holes and the certain internal diameter being connected to the diameter holes of internal diameter.In addition, being identical with this, sprue forming part 40
Endoporus 58 be not limited to be formed as the example of bellmouth, for example, it is also possible to positioned at 40 right end of sprue forming part
The large diameter hole of the diameter holes and the certain internal diameter being connected to the diameter holes of certain internal diameter.
In this case, the reducing diameter part 206 of sprue 204 by sprue forming part 38 diameter holes and sprue forming part
40 diameter holes are formed.As long as that is, the endoporus 52,58 of these sprue forming parts 38,40 forms undergauge in sprue 204
Portion 206 it is arbitrary poroid.
The present invention can use various structures, be not limited to more than embodiment.For example, sprue forming part also may be used
To be made of a component, the endoporus of sprue forming part may not be taper.
Reference sign
16 fix metal mold (the first metal mold), 18 injection mechanisms, 20 intermetallic metal moulds, 24 movable metal mold (the second gold medals
Belong to mould), 36 through holes, 38 sprue forming parts (first part), 40 sprue forming parts (second part), 42 elastomers, 46
Retainer, 54 sprue forming part main bodys, 56 flange parts, 52,58 endoporus, 82 protrusions, 200a first flows, 200b seconds
Road, the first cavities of 202a, the second cavities of 202b, 204 sprues, 206 reducing diameter parts, the first branches of 300a, the second branches of 300b
Portion, the first molded products of 302a, the second molded products of 302b, 304 relays.
Claims (2)
1. a kind of Coinjection molding apparatus has the first metal mold and second of the state arranged opposite can approach and detach
Metal mold and the intermetallic metal mould being configured between first metal mold and second metal mold,
Under mold closing state, can be formed between first metal mold and the intermetallic metal mould the first cavity, shape
The second cavity between second metal mold described in Cheng Yu and the intermetallic metal mould and the interior and general positioned at the intermetallic metal mould
Melted material is filled in the sprue that first cavity is connected to second cavity,
It is characterized in that：
In the intermetallic metal mould, it is provided with and has the sprue in inside and can directly be poured what die sinking side shifted up
Road forming part,
The material that the sprue forming part is made of first metal mold and second metal mold thermal conductivity ratio is high
Material is constituted.
2. Coinjection molding apparatus according to claim 1, it is characterised in that：
The sprue forming part is by being disposed in the through hole being arranged in the intermetallic metal mould and can mold direction
The first part of upper relative displacement and second part are constituted, and the first part abuts fixation in the through hole, and described the
Two parts can abut in die sinking side in the through hole and have on die sinking direction to described second in which shift up
The force application component of power is given, the first part is more than the second part relative to the contact area of the inner wall of the through hole
The contact area of inner wall relative to the through hole.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016-055817 | 2016-03-18 | ||
| JP2016055817 | 2016-03-18 | ||
| PCT/JP2017/002318 WO2017159048A1 (en) | 2016-03-18 | 2017-01-24 | Injection molding device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108778671A true CN108778671A (en) | 2018-11-09 |
Family
ID=59850657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780015665.1A Pending CN108778671A (en) | 2016-03-18 | 2017-01-24 | Coinjection molding apparatus |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP6572384B2 (en) |
| CN (1) | CN108778671A (en) |
| BR (1) | BR112018067858B1 (en) |
| WO (1) | WO2017159048A1 (en) |
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|---|---|---|---|---|
| US3806291A (en) * | 1972-03-09 | 1974-04-23 | Hendry Eng | Closed cell foam plastic molding machine |
| CN1139602A (en) * | 1995-07-06 | 1997-01-08 | 赫伯特冈特工程师有限公司 | Hot runner nozzle |
| CN1684811A (en) * | 2002-07-30 | 2005-10-19 | 标准模具有限公司 | Valve pin guidance and alignment system for an injection molding apparatus |
| JP2007083462A (en) * | 2005-09-21 | 2007-04-05 | Nippon Zeon Co Ltd | Mold for injection molding and method for producing resin molding |
| CN102010694A (en) * | 2010-11-19 | 2011-04-13 | 东莞安尚崇光科技有限公司 | Heat conducting composite material and injection molding process for combining same and LED metal shell |
| JP2013141777A (en) * | 2012-01-11 | 2013-07-22 | Honda Motor Co Ltd | Injection molding apparatus and injection molding method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3865502B2 (en) * | 1998-06-02 | 2007-01-10 | 積水化学工業株式会社 | Injection mold and method of manufacturing injection molded product |
-
2017
- 2017-01-24 BR BR112018067858-9A patent/BR112018067858B1/en active IP Right Grant
- 2017-01-24 CN CN201780015665.1A patent/CN108778671A/en active Pending
- 2017-01-24 WO PCT/JP2017/002318 patent/WO2017159048A1/en active Application Filing
- 2017-01-24 JP JP2018505302A patent/JP6572384B2/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3806291A (en) * | 1972-03-09 | 1974-04-23 | Hendry Eng | Closed cell foam plastic molding machine |
| CN1139602A (en) * | 1995-07-06 | 1997-01-08 | 赫伯特冈特工程师有限公司 | Hot runner nozzle |
| CN1684811A (en) * | 2002-07-30 | 2005-10-19 | 标准模具有限公司 | Valve pin guidance and alignment system for an injection molding apparatus |
| JP2007083462A (en) * | 2005-09-21 | 2007-04-05 | Nippon Zeon Co Ltd | Mold for injection molding and method for producing resin molding |
| CN102010694A (en) * | 2010-11-19 | 2011-04-13 | 东莞安尚崇光科技有限公司 | Heat conducting composite material and injection molding process for combining same and LED metal shell |
| JP2013141777A (en) * | 2012-01-11 | 2013-07-22 | Honda Motor Co Ltd | Injection molding apparatus and injection molding method |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017159048A1 (en) | 2017-09-21 |
| JP6572384B2 (en) | 2019-09-11 |
| BR112018067858A2 (en) | 2019-01-02 |
| BR112018067858B1 (en) | 2022-07-05 |
| JPWO2017159048A1 (en) | 2018-10-18 |
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