CN109177262A - A kind of disposable injection molding technique of rubber product two-color dual-density - Google Patents
A kind of disposable injection molding technique of rubber product two-color dual-density Download PDFInfo
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- CN109177262A CN109177262A CN201810957788.3A CN201810957788A CN109177262A CN 109177262 A CN109177262 A CN 109177262A CN 201810957788 A CN201810957788 A CN 201810957788A CN 109177262 A CN109177262 A CN 109177262A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/0009—Producing footwear by injection moulding; Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/0009—Producing footwear by injection moulding; Apparatus therefor
- B29D35/0018—Moulds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D35/00—Producing footwear
- B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
- B29D35/122—Soles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
Abstract
The invention discloses a kind of disposable injection molding techniques of rubber product two-color dual-density, belong to rubber product technology field.The disposable injection molding technique of rubber product two-color dual-density of the invention, the injection of two-color dual-density sizing material is completed in same die cavity, it is hollow, foaming and vulcanization process, the die cavity includes upper mold half, the cavity that lower mold half and mold core and three are formed, mold core is that the hollow of die cavity lays the foundation, has the condition for being filled with and vulcanizing required high temperature and high pressure gas and foaming and intumescing reduction density after hollow, high pressure needed for generating vulcanization while foaming and intumescing, and then it will be injection moulded, hollow and foaming, vulcanization plant is integrated, avoid heat losses caused by each process circulation in the prior art and process circulation cost, solves the multiple pressurization of traditional rubber products production technology, heating, secondary glue is viscous, energy consumption, it is time-consuming, the big disadvantage of at high cost one.
Description
Technical field
The invention belongs to rubber product technology fields, specifically, being related to a kind of rubber product two-color dual-density one
Secondary property injection molding technique.
Background technique
Existing dual-density rubber product, for example (bottom is that high density is resistance to the dual-density sole of Adidas, Nike product
Grind, be anti-skidding, upper layer is low-density, and elasticity is good, light), it is first to suppress the sheet stock of two kinds of density in production process, cuts molding
It is manually or mechanically sticked together with glue special afterwards, wherein low-density sheet stock is usually and carries out down after foaming outside mould
The vulcanization of one process.Its defect is that process is more, and glue adhesion is difficult to ensure the stabilization of quality, and disqualification rate is high, moreover, being also easy to
Environment is polluted, recruitment is more, higher cost.
Existing rubber dual density product also has using double injection moulding process, and injection moulding (uses double injection in two steps
Head injector), by the movement of injection head and the variation of mold core, it is directed at product mold, is first injection moulded high (low) density rubber
Material, then low (height) density rubber material is injected, obtain dual-density rubber product.Using double injection head injector, in injection head
In mobile alignment procedures, injection gate is easy to blocking or cast gate is unsmooth, generates waste product.
The size of rubber density itself, it is related with its (foaming) containing gas bubble, by gas foaming, obtain different densities
Rubber material, using two sets of injection mechanisms, not only increase equipment cost, but also increase and set to reach dual-density rubber product
Standby occupied area.
Through retrieving, Chinese patent publication No. CN 106188680 B, publication date 2018.04.06, denomination of invention: Yi Zhongnai
Oil, cold-resistant dual density footwear rubber sole, the compatibility of raw material is reasonable, using natural rubber, butadiene rubber and nitrile rubber conduct
Major ingredient is aided with other auxiliary agents, and ingredient takes into account the craftsmanship that sizing material is processed and physicochemical property, oil resistant, the cold tolerance of sizing material are good；It should
Invention additionally provides the preparation method of rubber sole, according to rubber plastic steelmaking, sizing material and refine, sizing material mixing, rubber compounding, rubber it is big
The manufacture at bottom and etc. successively carry out, this method is simple, and process is easily controllable, and the shoes outsole hardness prepared is moderate, durability,
Cold resistance is preferable.The present invention is suitable for the rubber articles such as preparation footwear oil resistant, arctic rubber outsole and sebific duct, sealing ring.The hair
It is bright to limit technical process from formula and process conditions, using traditional process equipment, when producing the rubber product of different densities,
The problem of injection and vulcanization separately carry out, and consume energy, is time-consuming, at high cost, equipment cost and process costs is not solved accordingly
Certainly.
Summary of the invention
1. technical problems to be solved by the inivention
When producing dual-density rubber product in the prior art to overcome, the double-deck adhesion has that pollution, recruitment be more, disqualification rate
The problems such as high, injection and vulcanization are separately consumed energy, are time-consuming, at high cost, the present invention provides a kind of rubber product two-color dual-density
Disposable injection molding technique.The present invention is integrated by the sizing material injection moulding of two kinds of density, hollow and vulcanization plant,
Molding, foaming are completed in same die cavity and is vulcanized, and in sulfidation, reduce cost, the molding time of rubber product, it is double
Layer directly vulcanization is integral, is not necessarily to adhesion, and reduce energy consumption, moreover it is possible to eliminate shipping expense between rubber product process.
2. technical solution
To solve the above problems, the present invention adopts the following technical scheme:
A kind of disposable injection molding technique of rubber product two-color dual-density completes two-color dual-density glue in same die cavity
The injection of material, hollow, foaming and vulcanization process, the die cavity include that upper mold half, lower mold half and mold core and three are formed
Cavity, mold core be the hollow of die cavity lay the foundation, have after hollow be filled with vulcanization required for high temperature and high pressure gas and
Foaming and intumescing reduces the condition of density, high pressure needed for vulcanization is generated while foaming and intumescing, so will injection moulding, it is hollow with
And foaming, vulcanization plant it is integrated, avoid in the prior art each process circulation caused by heat losses and process circulation cost,
Multiple pressurization, heating and the secondary glue for solving traditional rubber products production technology are pasted, and consume energy, is time-consuming, at high cost
One big disadvantage.
Further embodiment, specific steps are as follows:
Step 1: molding: upper mold half, lower mold half close up into die cavity, and die cavity is divided into upper cavity under by boundary of mold core
Die cavity in clamping process, 130~180 DEG C can be heated up to die cavity, can be increased by the outer wall of upper mold half, lower mold half
Heater achieves the goal, and guarantees rubber product cures requirements；
Step 2: double-density injection: while being respectively plasticized by two injectors of injection pedestal and expecting intracavitary sizing material point
It is not injected into upper cavity and lower mode cavity, and is formed full of being stood after die cavity；The sizing material is respectively high density sizing material and low-density
Sizing material, sizing material can be double-colored material, be temporarily stored into that respective plasticizing material is intracavitary, and wherein low-density sizing material is that high density sizing material adds respectively
Add foaming agent or swelling agent；Foaming agent is that chemical foaming agent can be H series, AC series etc.；Swelling agent is that physical blowing agent can
To be expandable microspheres, supercritical CO2Deng；
Step 3: die sinking: opening die cavity, upper mold half, the lower mold half for including half of rubber product respectively are separated, take out
Mold core；
Step 4: secondary mould closing: by the upper mold half for including half of rubber product respectively, lower mold half is secondary closes up, rubber
Hollow form after being removed inside glue product in mold core；
Step 5: gas injection: being filled with high temperature and high pressure gas in the hollow inside of rubber product, be allowed to have conditions of vulcanization；
Step 6: vulcanization and foaming vulcanization: the rubber product in die cavity is vulcanized, low-density sizing material is in low-density glue
It is to carry out being vulcanized while die cavity is filled up in foaming in upper cavity under normal circumstances in upper cavity or lower mode cavity where expecting,
In foaming process, since gap is reduced, air pressure is increased accordingly in die cavity, and high density sizing material is in the other half die cavity, ordinary circumstance
Under be lower mode cavity while vulcanizing；
Step 7: it pressure release: by the high temperature and high pressure gas pressure release of hollow inside, avoids steep that wall from rupturing, influences product quality；
Step 8: twice-die-opening: opening membrane cavity, takes out the one-time formed rubber product of two-color dual-density.
Further embodiment is vacuumized after step 1 molding, is in negative pressure state in membrane cavity, is facilitated the injection of sizing material.
Further scheme, when step 2 double-density injection, material temperature is 60~100 DEG C, 5~30s of injection time, injection
Afterwards, 5~50s is stood, is selected accordingly according to the requirement of rubber product specification or shape.
Further scheme combines mode using air-cooled and/or water cooling, by mold core temperature after step 3 takes out mold core
Degree control is at 60~100 DEG C.
Further scheme, the pressure of step 5 high temperature and high pressure gas are 10~50kg, and temperature is 130~180 DEG C, root
It is selected accordingly according to the requirement of rubber product specification or shape.
The time of further scheme, step 6 vulcanization and foaming vulcanization is 100~1000s, is advised according to rubber product
The requirement of lattice or shape is selected accordingly.
Further scheme, the shape of upper mold half, mold core and lower mold half are adapted with the shape of rubber product, than
Such as if it is sole, then three is adapted with the shape of sole.
Further scheme, die cavity are fixed seat in the plane；The injection pedestal is movable seat in the plane；The activity seat in the plane is corresponding
Multiple fixed seats in the plane, and moved back and forth between each fixed seat in the plane.Since vulcanization time is relatively long, injection time is relatively
It is short, it can be configured accordingly according to the multiple proportion the time required to the two technique, further increase productivity, and avoid infusing
It penetrates the sizing material in pedestal and is standing the thermal losses waited in sulfidation.
Further scheme, high density sizing material are reclaimed rubber or the rubber composition plasticizing of crosslinkable scrap rubber
Material, waste are utilized again, and production cost substantially reduces, and are also possible to another color mixing rubber composition, are organized in pairs
Coloring agent material.
3. beneficial effect
Compared with prior art, the present invention has the following obvious advantages:
(1) the disposable injection molding technique of rubber product two-color dual-density of the invention can be completed double in a system
The injection of color dual-density rubber material, hollow, foaming and vulcanization process, can effectively solve secondary heavy in rubber product production process
New pressurization, heating cause energy consumption, time-consuming, problem at high cost, avoid product in the circulation of each process, also to reduce rubber product
Cost, molding time, reduce energy consumption, and shipping expense between rubber product process can be eliminated；It furthermore reduces two
Secondary heating bring noxious gas emission, reduces the rejection rate of reheating bring rubber product, reduces reheating
Pressurization bring energy consumption, has achieved the effect that environmental protection and energy saving；
(2) the disposable injection molding technique of rubber product two-color dual-density of the invention, can be according to the difference of rubber product
Technique requirement, technological parameter needed for adjusting: injection pressure, injection temperature, middle air source pressure, gas source temperature, vulcanization time reach
To product optimum efficiency；
(3) the disposable injection molding technique of rubber product two-color dual-density of the invention, movable seat in the plane corresponds to multiple fixations
Seat in the plane, and moved back and forth between each fixed seat in the plane, in the sulfidation of rubber product, also successively carry out different vulcanization dresses
The injection work set, greatly improves work efficiency；
(4) the disposable injection molding technique of rubber product two-color dual-density of the invention, two-color dual-density rubber obtained
Product is heat-resisting, wear-resisting, weather-proof, moreover, same die cavity produces, quality is stablized, and dynamic balancing even results are good；
(5) production technology of the invention can continue production free of discontinuities, production efficiency and high degree of automation.
Specific embodiment
To further appreciate that the contents of the present invention, this present invention is described in detail in conjunction with the embodiments.
Embodiment 1
The disposable injection molding technique of rubber product two-color dual-density of the present embodiment, can complete double-colored in same die cavity
The injection of dual-density rubber material, it is hollow, foaming and vulcanization process, the die cavity include upper mold half, lower mold half and mold core and
The cavity that three is formed, mold core are that the hollow of die cavity lays the foundation, and have high temperature and pressure required for being filled with vulcanization after hollow
Gas and foaming and intumescing reduce the condition of density, high pressure needed for foaming and intumescing while generates vulcanization, and then will be injected into
Type, hollow and foaming, vulcanization plant are integrated, avoid heat losses and process caused by each process circulation in the prior art
Circulate cost, solves multiple pressurization, the heating of traditional rubber products production technology, and secondary glue is pasted, energy consumption, time-consuming, at
This high big disadvantage.
Embodiment 2
The disposable injection molding technique of rubber product two-color dual-density of the present embodiment, specific steps are as follows:
Step 1: molding: upper mold half, lower mold half close up into die cavity, and die cavity is divided into upper cavity under by boundary of mold core
Die cavity in clamping process, 130~180 DEG C can be heated up to die cavity, can be increased by the outer wall of upper mold half, lower mold half
Heater achieves the goal, and guarantees rubber product cures requirements；
Step 2: double-density injection: while being respectively plasticized by two injectors of injection pedestal and expecting intracavitary sizing material point
It is not injected into upper cavity and lower mode cavity, and is formed full of being stood after die cavity；The sizing material is respectively high density sizing material and low-density
Sizing material is temporarily stored into respective plasticizing respectively and expects intracavitary, reclaimed rubber or mixing rubber of the high density sizing material for crosslinkable scrap rubber
Glue composition, or another color mixing rubber composition, wherein low-density sizing material be high density sizing material add foaming agent or
Swelling agent；Foaming agent can be H series, AC series etc.；Swelling agent is that physical blowing agent can be expandable microspheres, supercritical CO2
Deng 1.0~5.0% that, additive amount is low-density sizing material weight；Material temperature is 60~100 DEG C, 5~30s of injection time, standing 5~
50s is selected accordingly according to the requirement of rubber product specification or shape；
Step 3: die sinking: opening die cavity, upper mold half, the lower mold half for including half of rubber product respectively are separated, take out
After mold core, the air-cooled mode combined with water cooling can be used, core temperature is controlled at 60~100 DEG C, core temperature mistake is prevented
Height causes the hollow inner rubber of the rubber product directly contacted with mold core to vulcanize in advance, or even incipient scorch occurs；
Step 4: secondary mould closing: by the upper mold half for including half of rubber product respectively, lower mold half is secondary closes up, rubber
Hollow form after being removed inside glue product in mold core；
Step 5: gas injection: it is filled with high temperature and high pressure gas in the hollow inside of rubber product, is allowed to have conditions of vulcanization, it is high
The pressure of warm high pressure gas is 10~50kg, and temperature is 130~180 DEG C, is carried out according to the requirement of rubber product specification or shape
Corresponding selection；
Step 6: vulcanization and foaming vulcanization: the rubber product in die cavity is vulcanized, low-density sizing material is in low-density glue
It is to carry out being vulcanized while die cavity is filled up in foaming in upper cavity under normal circumstances in upper cavity or lower mode cavity where expecting,
In foaming process, since gap is reduced, air pressure is increased accordingly in die cavity, and high density sizing material is in the other half die cavity, ordinary circumstance
Under be lower mode cavity while vulcanizing；Time is 100~1000s, is selected accordingly according to the requirement of rubber product specification or shape
It selects；
Step 7: it pressure release: by the high temperature and high pressure gas pressure release of hollow inside, avoids steep that wall from rupturing, influences product quality；
Step 8: twice-die-opening: opening membrane cavity, takes out the one-time formed rubber product of two-color dual-density.
Embodiment 3
The disposable injection molding technique of rubber product two-color dual-density of the present embodiment, the children's footwear sole of 34 yards of production, on
The shape of half mold, lower mold half and mold core is consistent with the shape of children's footwear sole, specific steps are as follows:
Preamble preparation process, rubber plasticizing: high density sizing material is to mould the reclaimed rubber particle of crosslinkable scrap rubber
Change plasticizing in injection screw, the flow-like sizing material after plasticizing is intracavitary temporary in plasticizing material, and plasticization temperature is 60 DEG C, it is therefore an objective to make glue
Expect fluidisation, facilitates subsequent injection to project, and keep the temperature, it can be by being kept the temperature in the ring wall internal heater of plasticizing material chamber；
Low-density sizing material is to be plasticized another color mixing rubber composition rubber grain in another plasticizing injection screw, after plasticizing
Flow-like sizing material add H series foaming agent, additive amount be low-density sizing material weight 1.0% mix, another plasticizing material chamber
Interior temporary, plasticization temperature is 60 DEG C, it is therefore an objective to make gum fluid, facilitates subsequent injection to project, and keep the temperature, it can be by moulding
The ring wall internal heater of material chamber is kept the temperature；
Step 1: molding: upper mold half, lower mold half close up into die cavity, and mold cavity shapes are consistent with 34 yards of children's footwear sole,
Die cavity is divided into upper cavity and lower mode cavity using mold core as boundary, in clamping process, 130 DEG C can be heated up to die cavity, can pass through upper half
Mold, lower mold half outer wall increase heater and achieve the goal, guarantee rubber product cures requirements；
Step 2: double-density injection: while being respectively plasticized by two injectors of injection pedestal and expecting intracavitary sizing material point
It is not injected into upper cavity and lower mode cavity, middle-high density sizing material injects lower mode cavity, and low-density sizing material injects upper cavity, and full of whole
Molding is stood after a die cavity；Injection time 5s stands 5s；
Step 3: die sinking: opening die cavity, upper mold half, the lower mold half for including half of rubber product respectively are separated, take out
After mold core, the air-cooled mode combined with water cooling can be used, core temperature is controlled at 60 DEG C, prevents core temperature is excessively high from causing
The hollow inner rubber of the rubber product directly contacted with mold core vulcanizes in advance, or even incipient scorch occurs；
Step 4: secondary mould closing: by the upper mold half for including half of rubber product respectively, lower mold half is secondary closes up, rubber
Hollow form after being removed inside glue product in mold core；
Step 5: gas injection: it is filled with high temperature and high pressure gas in the hollow inside of rubber product, is allowed to have conditions of vulcanization, it is high
The pressure of warm high pressure gas is 50kg, and temperature is 130 DEG C；
Step 6: vulcanization and foaming vulcanization: the rubber product in die cavity is vulcanized, low-density sizing material is in low-density glue
It carries out being vulcanized while die cavity is filled up in foaming in upper cavity where expecting, in foaming process, since gap is reduced, in die cavity
Air pressure increases accordingly, and high density sizing material vulcanizes simultaneously in lower mode cavity, time 100s；
Step 7: it pressure release: by the high temperature and high pressure gas pressure release of hollow inside to normal pressure, avoids steep that wall from rupturing, influences product
Quality；
Step 8: twice-die-opening: opening membrane cavity, takes out one-time formed 34 yards of two-color dual-density of children's footwear sole.
Through detecting, 34 yards obtained of children's footwear two-color dual-density sole is heat-resisting, wear-resisting, weather-proof, moreover, same die cavity is raw
It produces, is not necessarily to additional glue adhesion, quality is stablized, and dynamic balancing even results are good.
Embodiment 4
The disposable injection molding technique of rubber product two-color dual-density of the present embodiment, the two-color dual-density shoes of 38 yards of production
Bottom, the shape of upper mold half, lower mold half and mold core is consistent with the shape of 38 yards of two-color dual-density sole, specific steps
Are as follows:
Preamble preparation process, rubber plasticizing: high density sizing material is to mould the reclaimed rubber particle of crosslinkable scrap rubber
Change plasticizing in injection screw, the flow-like sizing material after plasticizing is intracavitary temporary in plasticizing material, and plasticization temperature is 70 DEG C, it is therefore an objective to make glue
Expect fluidisation, facilitates subsequent injection to project, and keep the temperature, it can be by being kept the temperature in the ring wall internal heater of plasticizing material chamber；
Low-density sizing material is to be plasticized another color mixing rubber composition rubber grain in another plasticizing injection screw, after plasticizing
Flow-like sizing material add AC series foaming agent, additive amount be low-density sizing material weight 2.0% mix, another plasticizing material chamber
Interior temporary, plasticization temperature is 70 DEG C, it is therefore an objective to make gum fluid, facilitates subsequent injection to project, and keep the temperature, it can be by moulding
The ring wall internal heater of material chamber is kept the temperature；
Step 1: molding: upper mold half, lower mold half close up into die cavity, mold cavity shapes and 38 yards of two-color dual-density shoes
Bottom is consistent, and die cavity is divided into upper cavity and lower mode cavity using mold core as boundary, in clamping process, 150 DEG C can be heated up to die cavity, can be led to
Cross upper mold half, the outer wall of lower mold half increases heater and achieves the goal, guarantee rubber product cures requirements；
Step 2: double-density injection: while being respectively plasticized by two injectors of injection pedestal and expecting intracavitary sizing material point
It is not injected into upper cavity and lower mode cavity, middle-high density sizing material injects lower mode cavity, and low-density sizing material injects upper cavity, and full of whole
Molding is stood after a die cavity；Injection time 10s stands 10s；
Step 3: die sinking: opening die cavity, upper mold half, the lower mold half for including half of rubber product respectively are separated, take out
After mold core, the air-cooled mode combined with water cooling can be used, core temperature is controlled at 70 DEG C, prevents core temperature is excessively high from causing
The hollow inner rubber of the rubber product directly contacted with mold core vulcanizes in advance, or even incipient scorch occurs；
Step 4: secondary mould closing: by the upper mold half for including half of rubber product respectively, lower mold half is secondary closes up, rubber
Hollow form after being removed inside glue product in mold core；
Step 5: gas injection: it is filled with high temperature and high pressure gas in the hollow inside of rubber product, is allowed to have conditions of vulcanization, it is high
The pressure of warm high pressure gas is 12kg, and temperature is 150 DEG C；
Step 6: vulcanization and foaming vulcanization: the rubber product in die cavity is vulcanized, low-density sizing material is in low-density glue
It carries out being vulcanized while die cavity is filled up in foaming in upper cavity where expecting, in foaming process, since gap is reduced, in die cavity
Air pressure increases accordingly, and high density sizing material vulcanizes simultaneously in lower mode cavity, time 200s；
Step 7: it pressure release: by the high temperature and high pressure gas pressure release of hollow inside to normal pressure, avoids steep that wall from rupturing, influences product
Quality；
Step 8: twice-die-opening: opening membrane cavity, takes out one-time formed 38 yards of two-color dual-density of two-color dual-density shoes
Bottom.
Through detecting, 38 yards obtained of two-color dual-density sole is heat-resisting, wear-resisting, weather-proof, moreover, same die cavity produces, matter
Amount is stablized, and dynamic balancing even results are good.
Embodiment 5
The disposable injection molding technique of rubber product two-color dual-density of the present embodiment, the two-color dual-density shoes of 40 yards of production
Bottom, the shape of upper mold half, lower mold half and mold core is consistent with the shape of 40 yards of two-color dual-density sole, specific steps
Are as follows:
Preamble preparation process, rubber plasticizing: crosslinkable mixing rubber composition grain is moulded in plasticizing injection screw
Change, the flow-like sizing material after plasticizing is intracavitary temporary in plasticizing material, and plasticization temperature is 75 DEG C, it is therefore an objective to make gum fluid, it is convenient
Subsequent injection is projected, and is kept the temperature, can be by being kept the temperature in the ring wall internal heater of plasticizing material chamber；By fluidisation after plasticizing
Sizing material is divided into two parts, and portion is high density sizing material, and portion is low-density sizing material, and low-density sizing material is another color, such as high
Density sizing material adds red rubber colorant, to reduce density, then adds expandable microspheres, and additive amount is low-density sizing material weight
3.0%, it is intracavitary that it is temporarily stored into respectively plasticizing material respectively；
Step 1: molding: upper mold half, lower mold half close up into die cavity, mold cavity shapes and 40 yards of two-color dual-density shoes
Bottom is consistent, and die cavity is divided into upper cavity and lower mode cavity using mold core as boundary, in clamping process, 160 DEG C can be heated up to die cavity, can be led to
Cross upper mold half, the outer wall of lower mold half increases heater and achieves the goal, guarantee rubber product cures requirements；
Step 2: double-density injection: while being respectively plasticized by two injectors of injection pedestal and expecting intracavitary sizing material point
It is not injected into upper cavity and lower mode cavity, middle-high density sizing material injects lower mode cavity, and low-density sizing material injects upper cavity, and full of whole
Molding is stood after a die cavity；Injection time 18s stands 20s；
Step 3: die sinking: opening die cavity, upper mold half, the lower mold half for including half of rubber product respectively are separated, take out
After mold core, the air-cooled mode combined with water cooling can be used, core temperature is controlled at 75 DEG C, prevents core temperature is excessively high from causing
The hollow inner rubber of the rubber product directly contacted with mold core vulcanizes in advance, or even incipient scorch occurs；
Step 4: secondary mould closing: by the upper mold half for including half of rubber product respectively, lower mold half is secondary closes up, rubber
Hollow form after being removed inside glue product in mold core；
Step 5: gas injection: it is filled with high temperature and high pressure gas in the hollow inside of rubber product, is allowed to have conditions of vulcanization, it is high
The pressure of warm high pressure gas is 20kg, and temperature is 160 DEG C；
Step 6: vulcanization and foaming vulcanization: the rubber product in die cavity is vulcanized, low-density sizing material is in low-density glue
It carries out being vulcanized while die cavity is filled up in foaming in upper cavity where expecting, in foaming process, since gap is reduced, in die cavity
Air pressure increases accordingly, and high density sizing material vulcanizes simultaneously in lower mode cavity, time 400s；
Step 7: it pressure release: by the high temperature and high pressure gas pressure release of hollow inside to normal pressure, avoids steep that wall from rupturing, influences product
Quality；
Step 8: twice-die-opening: opening membrane cavity, takes out one-time formed 40 yards of two-color dual-density of two-color dual-density shoes
Bottom.
Through detecting, 40 yards obtained of two-color dual-density two-color dual-density sole is heat-resisting, wear-resisting, weather-proof, moreover, same mould
Chamber production, quality are stablized, and dynamic balancing even results are good.
Embodiment 6
The disposable injection molding technique of rubber product two-color dual-density of the present embodiment, the two-color dual-density shoes of 42 yards of production
Bottom, the shape of upper mold half, lower mold half and mold core is consistent with the shape of 42 yards of two-color dual-density sole, specific steps
Are as follows:
Preamble preparation process, rubber plasticizing: high density sizing material is to mould the reclaimed rubber particle of crosslinkable scrap rubber
Change plasticizing in injection screw, the flow-like sizing material after plasticizing is intracavitary temporary in plasticizing material, and plasticization temperature is 90 DEG C, it is therefore an objective to make glue
Expect fluidisation, facilitates subsequent injection to project, and keep the temperature, it can be by being kept the temperature in the ring wall internal heater of plasticizing material chamber；
Low-density sizing material is to be plasticized another color mixing rubber composition rubber grain in another plasticizing injection screw, after plasticizing
Flow-like sizing material add supercritical CO2, additive amount is 5.0% mixing of low-density sizing material weight, is expected in another plasticizing intracavitary
Temporary, plasticization temperature is 90 DEG C, it is therefore an objective to make gum fluid, facilitates subsequent injection to project, and keep the temperature, it can be by being plasticized
The ring wall internal heater of material chamber is kept the temperature；
Step 1: molding: upper mold half, lower mold half close up into die cavity, mold cavity shapes and 42 yards of two-color dual-density shoes
Bottom is consistent, and die cavity is divided into upper cavity and lower mode cavity using mold core as boundary, in clamping process, 170 DEG C can be heated up to die cavity, can be led to
Cross upper mold half, the outer wall of lower mold half increases heater and achieves the goal, guarantee rubber product cures requirements；
Step 2: double-density injection: while being respectively plasticized by two injectors of injection pedestal and expecting intracavitary sizing material point
It is not injected into upper cavity and lower mode cavity, middle-high density sizing material injects lower mode cavity, and low-density sizing material injects upper cavity, and full of whole
Molding is stood after a die cavity；Injection time 24s stands 40s；
Step 3: die sinking: opening die cavity, upper mold half, the lower mold half for including half of rubber product respectively are separated, take out
After mold core, the air-cooled mode combined with water cooling can be used, core temperature is controlled at 90 DEG C, prevents core temperature is excessively high from causing
The hollow inner rubber of the rubber product directly contacted with mold core vulcanizes in advance, or even incipient scorch occurs；
Step 4: secondary mould closing: by the upper mold half for including half of rubber product respectively, lower mold half is secondary closes up, rubber
Hollow form after being removed inside glue product in mold core；
Step 5: gas injection: it is filled with high temperature and high pressure gas in the hollow inside of rubber product, is allowed to have conditions of vulcanization, it is high
The pressure of warm high pressure gas is 40kg, and temperature is 170 DEG C；
Step 6: vulcanization and foaming vulcanization: the rubber product in die cavity is vulcanized, low-density sizing material is in low-density glue
It carries out being vulcanized while die cavity is filled up in foaming in upper cavity where expecting, in foaming process, since gap is reduced, in die cavity
Air pressure increases accordingly, and high density sizing material vulcanizes simultaneously in lower mode cavity, time 800s；
Step 7: it pressure release: by the high temperature and high pressure gas pressure release of hollow inside to normal pressure, avoids steep that wall from rupturing, influences product
Quality；
Step 8: twice-die-opening: opening membrane cavity, takes out one-time formed 42 yards of two-color dual-density of two-color dual-density shoes
Bottom.
Through detecting, 42 yards obtained of two-color dual-density sole is heat-resisting, wear-resisting, weather-proof, moreover, same die cavity produces, matter
Amount is stablized, and dynamic balancing even results are good.
Embodiment 7
The disposable injection molding technique of rubber product two-color dual-density of the present embodiment, the two-color dual-density shoes of 44 yards of production
Bottom, the shape of upper mold half, lower mold half and mold core is consistent with the shape of 44 yards of two-color dual-density sole, specific steps
Are as follows:
Preamble preparation process, rubber plasticizing: by the reclaimed rubber particle of crosslinkable scrap rubber in plasticizing injection screw
Plasticizing, the flow-like sizing material after plasticizing is intracavitary temporary in plasticizing material, and plasticization temperature is 100 DEG C, it is therefore an objective to make gum fluid, side
Just subsequent injection is projected, and is kept the temperature, can be by being kept the temperature in the ring wall internal heater of plasticizing material chamber；By fluid after plasticizing
Change sizing material and be divided into two parts, portion is high density sizing material, and portion is low-density sizing material, and low-density sizing material is high density sizing material addition hair
Infusion or swelling agent mix, and foaming agent can be H series, AC series etc., swelling agent for physical blowing agent can be expandable microspheres,
Supercritical CO2Deng 1.0~5.0% that, additive amount is low-density sizing material weight, it is intracavitary to be temporarily stored into respectively plasticizing material respectively, may be used also
To add rubber color, change primary colours；
Step 1: molding: upper mold half, lower mold half close up into die cavity, mold cavity shapes and 44 yards of two-color dual-density shoes
Bottom is consistent, and die cavity is divided into upper cavity and lower mode cavity using mold core as boundary, in clamping process, 180 DEG C can be heated up to die cavity, can be led to
Cross upper mold half, the outer wall of lower mold half increases heater and achieves the goal, guarantee rubber product cures requirements；
Step 2: double-density injection: while being respectively plasticized by two injectors of injection pedestal and expecting intracavitary sizing material point
It is not injected into upper cavity and lower mode cavity, middle-high density sizing material injects lower mode cavity, and low-density sizing material injects upper cavity, and full of whole
Molding is stood after a die cavity；Injection time 30s stands 50s；
Step 3: die sinking: opening die cavity, upper mold half, the lower mold half for including half of rubber product respectively are separated, take out
After mold core, the air-cooled mode combined with water cooling can be used, core temperature is controlled at 100 DEG C, prevents core temperature is excessively high from leading
It causes the hollow inner rubber of the rubber product directly contacted with mold core to vulcanize in advance, or even incipient scorch occurs；
Step 4: secondary mould closing: by the upper mold half for including half of rubber product respectively, lower mold half is secondary closes up, rubber
Hollow form after being removed inside glue product in mold core；
Step 5: gas injection: it is filled with high temperature and high pressure gas in the hollow inside of rubber product, is allowed to have conditions of vulcanization, it is high
The pressure of warm high pressure gas is 40kg, and temperature is 180 DEG C；
Step 6: vulcanization and foaming vulcanization: the rubber product in die cavity is vulcanized, low-density sizing material is in low-density glue
It carries out being vulcanized while die cavity is filled up in foaming in upper cavity where expecting, in foaming process, since gap is reduced, in die cavity
Air pressure increases accordingly, and high density sizing material vulcanizes simultaneously in lower mode cavity, time 1000s；
Step 7: it pressure release: by the high temperature and high pressure gas pressure release of hollow inside to normal pressure, avoids steep that wall from rupturing, influences product
Quality；
Step 8: twice-die-opening: opening membrane cavity, takes out one-time formed 44 yards of two-color dual-density of two-color dual-density shoes
Bottom.
Through detecting, 44 yards obtained of two-color dual-density sole is heat-resisting, wear-resisting, weather-proof, moreover, same die cavity produces, matter
Amount is stablized, and dynamic balancing even results are good.
Embodiment 8
The disposable injection molding technique of rubber product two-color dual-density of the present embodiment, the two-color dual-density shoes of 44 yards of production
Bottom, the shape of upper mold half, lower mold half and mold core is consistent with the shape of 44 yards of two-color dual-density sole, can be set with die cavity
It is set to fixed seat in the plane；The injection pedestal is movable seat in the plane；The activity seat in the plane corresponds to multiple fixed seats in the plane, and in each fixation
It is moved back and forth between seat in the plane.Since vulcanization time is relatively long, 1000s, injection time is relatively short, 30s, theoretically can root
It is configured according to the multiple proportion the time required to the two technique i.e. 33 times, but needs to remove the traveling time of movable seat in the plane, when mobile
Between be 30s, then it is more appropriate with the proportional arrangement of 1:16.It is greatly improved productivity, and the sizing material in injection pedestal is avoided to exist
Stand the thermal losses waited in sulfidation；Specific steps are as follows:
Preamble preparation process, rubber plasticizing: by the reclaimed rubber particle of crosslinkable scrap rubber in plasticizing injection screw
Plasticizing, the flow-like sizing material after plasticizing is intracavitary temporary in plasticizing material, and plasticization temperature is 80 DEG C, it is therefore an objective to make gum fluid, side
Just subsequent injection is projected, and is kept the temperature, can be by being kept the temperature in the ring wall internal heater of plasticizing material chamber；By fluid after plasticizing
Change sizing material and be divided into two parts, portion is high density sizing material, and portion is low-density sizing material, and low-density sizing material is high density sizing material addition hair
Infusion or swelling agent mix, and foaming agent can be H series, AC series etc., swelling agent for physical blowing agent can be expandable microspheres,
Supercritical CO2Deng 1.0~5.0% that, additive amount is low-density sizing material weight, it is intracavitary that it is temporarily stored into respectively plasticizing material respectively；It is low close
Rubber color can also be added in degree sizing material, changes primary colours, reaches bilevel two-color effect；
Step 1: molding: upper mold half, lower mold half close up into die cavity, mold cavity shapes and 44 yards of two-color dual-density shoes
Bottom is consistent, and die cavity is divided into upper cavity and lower mode cavity using mold core as boundary, in clamping process, 130 DEG C can be heated up to die cavity, can be led to
Cross upper mold half, the outer wall of lower mold half increases heater and achieves the goal, guarantee rubber product cures requirements；
Step 2: double-density injection: while being respectively plasticized by two injectors of injection pedestal and expecting intracavitary sizing material point
It is not injected into upper cavity and lower mode cavity, middle-high density sizing material injects lower mode cavity, and low-density sizing material injects upper cavity, and full of whole
Molding is stood after a die cavity；Injection time 30s stands 50s；
Step 3: die sinking: opening die cavity, upper mold half, the lower mold half for including half of rubber product respectively are separated, take out
After mold core, the air-cooled mode combined with water cooling can be used, core temperature is controlled at 80 DEG C, prevents core temperature is excessively high from causing
The hollow inner rubber of the rubber product directly contacted with mold core vulcanizes in advance, or even incipient scorch occurs；
Step 4: secondary mould closing: by the upper mold half for including half of rubber product respectively, lower mold half is secondary closes up, rubber
Hollow form after being removed inside glue product in mold core；
Step 5: gas injection: it is filled with high temperature and high pressure gas in the hollow inside of rubber product, is allowed to have conditions of vulcanization, it is high
The pressure of warm high pressure gas is 40kg, and temperature is 130 DEG C；
Step 6: vulcanization and foaming vulcanization: the rubber product in die cavity is vulcanized, low-density sizing material is in low-density glue
It carries out being vulcanized while die cavity is filled up in foaming in upper cavity where expecting, in foaming process, since gap is reduced, in die cavity
Air pressure increases accordingly, and high density sizing material vulcanizes simultaneously in lower mode cavity, time 1000s；
In vulcanization and foaming sulfidation, moving machine position is moved to by next fixed seat in the plane, sequentially by fixed seat in the plane,
Step 1 is repeated to six, returns to the first seat in the plane after repeating 24 times；
Step 7: it pressure release: by the high temperature and high pressure gas pressure release of hollow inside to normal pressure, avoids steep that wall from rupturing, influences product
Quality；
Step 8: twice-die-opening: opening membrane cavity, takes out one-time formed 44 yards of two-color dual-density of two-color dual-density shoes
Bottom.
Through detecting, 44 yards obtained of two-color dual-density sole is heat-resisting, wear-resisting, weather-proof, moreover, same die cavity produces, matter
Amount is stablized, and dynamic balancing even results are good.
Schematically the present invention and embodiments thereof are described above, description is not limiting.So if
Those of ordinary skill in the art are inspired by it, without departing from the spirit of the invention, not inventively designs
Frame mode similar with the technical solution and embodiment out, are within the scope of protection of the invention.
Claims (10)
1. a kind of disposable injection molding technique of rubber product two-color dual-density, which is characterized in that completed in same die cavity double
The injection of color dual-density rubber material, hollow, foaming and vulcanization process, the die cavity include upper mold half, lower mold half and mold core.
2. rubber product two-color dual-density once through moulding technology as described in claim 1, which is characterized in that step are as follows:
Step 1: molding: upper mold half, lower mold half close up into die cavity, and die cavity is divided into upper cavity and lower mode cavity by boundary of mold core；
Step 2: double-density injection: while being respectively plasticized by two injectors of injection pedestal and expecting that intracavitary sizing material is infused respectively
Upper cavity and lower mode cavity are injected, and is formed full of being stood after die cavity；The sizing material is respectively high density sizing material and low-density sizing material,
It is intracavitary that it is temporarily stored into respective plasticizing material respectively, the low-density sizing material is that high density sizing material adds foaming agent or swelling agent；
Step 3: die sinking: opening die cavity, take out mold core；
Step 4: secondary mould closing: by the upper mold half for including half of rubber product respectively, lower mold half is secondary closes up, rubber system
Hollow form after being removed inside product in mold core；
Step 5: gas injection: being filled with high temperature and high pressure gas in the hollow inside of rubber product；
Step 6: vulcanization and foaming vulcanization: the rubber product in die cavity is vulcanized, low-density sizing material is in low-density sizing material institute
Upper cavity or lower mode cavity in vulcanized while die cavity is filled up in foaming, high density sizing material is same in the other half die cavity
When vulcanize；
Step 7: pressure release: by the high temperature and high pressure gas pressure release of hollow inside；
Step 8: twice-die-opening: opening membrane cavity, takes out the one-time formed rubber product of two-color dual-density.
3. the disposable injection molding technique of rubber product two-color dual-density as claimed in claim 2, which is characterized in that step 1 is closed
It is vacuumized after mould, is in negative pressure state in membrane cavity；In clamping process, 130~180 DEG C are heated up to die cavity.
4. the disposable injection molding technique of rubber product two-color dual-density as claimed in claim 2, which is characterized in that step 2 is double
When density is injected, material temperature is 60~100 DEG C, 5~30s of injection time, after injection, stands 5~50s.
5. the disposable injection molding technique of rubber product two-color dual-density as claimed in claim 2, which is characterized in that step 3 takes
Out after mold core, mode is combined using air-cooled and/or water cooling, core temperature is controlled at 60~100 DEG C.
6. the disposable injection molding technique of rubber product two-color dual-density as claimed in claim 2, which is characterized in that step 5 is high
The pressure of warm high pressure gas is 10~50kg, and temperature is 130~180 DEG C.
7. the disposable injection molding technique of rubber product two-color dual-density as claimed in claim 2, which is characterized in that step 6 sulphur
Change and the time of foaming vulcanization is 100~1000s.
8. the disposable injection molding technique of rubber product two-color dual-density as claimed in claim 2, which is characterized in that the upper half
The shape of mold, mold core and lower mold half is adapted with the shape of rubber product.
9. the disposable injection molding technique of rubber product two-color dual-density as described in claim 2 to 7 is any, which is characterized in that
The die cavity is fixed seat in the plane；The injection pedestal is movable seat in the plane；The activity seat in the plane corresponds to multiple fixed seats in the plane, and each
It is moved back and forth between a fixed seat in the plane.
10. the disposable injection molding technique of rubber product two-color dual-density as claimed in claim 8, which is characterized in that the height
Density sizing material is the reclaimed rubber or mixing rubber composition of crosslinkable scrap rubber, or another color mixing rubber combination
Object.
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| CN201810957788.3A CN109177262A (en) | 2018-08-22 | 2018-08-22 | A kind of disposable injection molding technique of rubber product two-color dual-density |
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| CN201810957788.3A CN109177262A (en) | 2018-08-22 | 2018-08-22 | A kind of disposable injection molding technique of rubber product two-color dual-density |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110861334A (en) * | 2019-11-21 | 2020-03-06 | 东莞同成塑胶五金制品有限公司 | Single-color double-density rubber tire capable of being injection-cast and forming process thereof |
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2018
- 2018-08-22 CN CN201810957788.3A patent/CN109177262A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110861334A (en) * | 2019-11-21 | 2020-03-06 | 东莞同成塑胶五金制品有限公司 | Single-color double-density rubber tire capable of being injection-cast and forming process thereof |
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