CN107553808A - Car inner plate low pressure chemical frothing injection mould and its forming method - Google Patents
Car inner plate low pressure chemical frothing injection mould and its forming method Download PDFInfo
- Publication number
- CN107553808A CN107553808A CN201710703898.2A CN201710703898A CN107553808A CN 107553808 A CN107553808 A CN 107553808A CN 201710703898 A CN201710703898 A CN 201710703898A CN 107553808 A CN107553808 A CN 107553808A
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- China
- Prior art keywords
- mould
- low pressure
- pressure chemical
- injection
- car inner
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- 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.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 39
- 239000007924 injection Substances 0.000 title claims abstract description 39
- 239000000126 substance Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000004088 foaming agent Substances 0.000 claims description 9
- 229920000426 Microplastic Polymers 0.000 claims description 5
- 239000004743 Polypropylene Substances 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 5
- 239000003365 glass fiber Substances 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 230000003584 silencer Effects 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 235000008331 Pinus X rigitaeda Nutrition 0.000 claims description 2
- 235000011613 Pinus brutia Nutrition 0.000 claims description 2
- 241000018646 Pinus brutia Species 0.000 claims description 2
- 230000003111 delayed effect Effects 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims 3
- 238000005187 foaming Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 4
- 230000007812 deficiency Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 208000020442 loss of weight Diseases 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000004604 Blowing Agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 208000002925 dental caries Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000002615 epidermis Anatomy 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Landscapes
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of car inner plate low pressure chemical frothing injection mould, it includes baffle plate, lower mould bottom plate, upper die and lower die, air accumulator and hot flow path；The upper mould is installed on baffle plate, and the lower mould is installed in lower mould bottom plate, and die cavity is formed between upper die and lower die, and the die cavity is connected with air accumulator, while the side wall of die cavity is provided with cast gate, and die cavity is connected by cast gate with hot flow path；It is also equipped with lifting mould oil cylinder in the lower mould bottom plate, one end of mould jacking block is lifted in the output end connection for lifting mould oil cylinder, the upper baffle plate of other end connection of mould jacking block is lifted, for controlling the lifting of upper baffle plate and upper mould.In addition the invention also discloses a kind of forming method using car inner plate low pressure chemical frothing injection mould, this method has reduction material cost, and product internal stress is small, eliminates and shrinks trace, is not likely to produce the advantages of warpage etc. deforms.
Description
Technical field
The present invention relates to injection molding process technical field, specifically a kind of car inner plate low pressure chemical frothing injection
The forming method of mould.
Background technology
In the use of automobile moulding, the usage amount of many modules all relies on injection articles for use, but due to automobile zero
Part is many, it is necessary to different types of moulding so that the manufacture of moulding can not be widely applied, and be made in automobile making
Use also comparatively laborious.
Automotive upholstery is to reach cost-effective at present, and the purpose that open defect is less, it will usually specified product
Weight, too high is required to product appearance.But product weight it is specified when, it is necessary to strictly control production materials so that product conduct oneself with dignity
Greatly；So existing deficiency is：Gum intaking passage is too short, and material head is meticulous, and being improved by injection machine technique adjustment causes open defect to increase
Add.And during too high requirement product appearance, can also there is mould structure complexity, (shrink trace in surface is obvious, warpage becomes for increase cost
Shape is serious) the defects of.In addition, the product cost of current automotive upholstery is single, customer demand can not be met, this also have impact on
Sales volume.
Nowadays the manufacture craft that car inner plate is taken generally has high pressure chemistry foaming and physical blowing.High pressure chemistry foams
Existing deficiency is that product internal stress is excessive, yielding.Deficiency existing for physical blowing is the often nitrogen of physical blowing
Transmitting, which is mixed into expects pipe, carries out filling injection, and equipment investment cost is high.
The content of the invention
It is an object of the invention to for above-mentioned the deficiencies in the prior art, there is provided a kind of car inner plate low pressure chemical foaming note
The forming method of mould.
The technical scheme that the present invention takes is as follows：
A kind of car inner plate low pressure chemical frothing injection mould, it includes baffle plate, lower mould bottom plate, upper die and lower die, storage
Gas tank and hot flow path；The upper mould is installed on baffle plate, and the lower mould is installed in lower mould bottom plate, between upper die and lower die
Die cavity is formed, the die cavity is connected with air accumulator, while the side wall of die cavity is provided with cast gate, and die cavity passes through cast gate and hot flow path
It is connected；It is also equipped with lifting mould oil cylinder in the lower mould bottom plate, one end of mould jacking block is lifted in the output end connection for lifting mould oil cylinder,
The upper baffle plate of other end connection of mould jacking block is lifted, for controlling the lifting of upper baffle plate and upper mould.
Further, the injection mold also includes push pedal, and the push pedal is located between lower mould bottom plate and lower mould and set
In the lower section of hot flow path, it protects hot flow path by spacing and empty avoiding, and the push pedal is provided with the top for being used for ejecting interior panel products
Block and thimble.
Further, the injection mold also includes being used for the silencer for eliminating noise.
Present invention also offers another technical solution：
A kind of forming method of car inner plate low pressure chemical frothing injection mould, it comprises the following steps：
Step 1：By plastic pellet injection barrel proportional to foaming agent, by heater to barrel temperature and mould
Hot flow path is heated, and then starts start；
Step 2：Upper mould declines, while gas auxiliary equipment squeezes into gas into the die cavity of sealing；
Step 3：Upper mould starts matched moulds, and when mould cavity pressure reaches 0.8-2.0MPa, lower mould starts injection, until injection
Complete, and the 5-10S that is delayed makes the gas in mould slowly be discharged by steam vent；
Step 4：Upper mould release simultaneously lifts mould oil cylinder using lower mould and lifts upper mould and carry out pine and move back, sensing limiter sensing mold closing
Foamed when reaching a certain height to inner panel product space；
Step 5：Upper mould, which moves up, to be molded, and then mold jacking block, the interior injection finished goods of thimble start ejection die cavity are taken out
Interior panel products.
Further, in the step 1, treat that the temperature of barrel temperature and mold hot flow reaches 260 by heater
Degree Celsius when, start start.
Further, when the upper mould drops to die height 5mm, gas auxiliary equipment squeezes into gas into the die cavity of sealing
Body.
Further, foamed when the sensing limiter reaches die height 3mm to inner panel product space, foamed time
6s, cool time 15s.
The beneficial effects of the invention are as follows：
(1), the material usage of low pressure foaming.
The weight saving of panel products can reach 10%-20% in chemical blowing, available for formed automobile interior trim inner panel, make
It is higher 3-4 times than unexpanded material of the same race with inexpensive mould, its Unit Weight strength and stiffness.The inner panel foaming skill of the present invention
Art product, it is using material：PP (polypropylene)+GF (glass)+CBA, chemical foam blowing agent agent proportional quantity are 3%-
5%.
(2), the properties of product of low pressure foaming.
Core can mix roving glass fiber material, have so as to greatly reducing the production cost of product and larger scratch Qu Gang
Property, the surface quality of thick article is preferable, will not produce obvious shrink indenture, product strength increase.
Brief description of the drawings
Fig. 1 is the structural representation of injection mold in the present invention.
In figure：Mould, 5- air accumulators under the upper baffle plates of 1-, 2- lower mould bottom plates, the upper moulds of 3-, 4-, 6- hot flow paths, 7- push pedals, 8-
Silencer, 9- die cavitys, panel products, 11- lift mould oil cylinder in 10-, 12- lifts mould jacking block.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment one：
As shown in figure 1, a kind of car inner plate low pressure chemical frothing injection mould, other including upper baffle plate 1, lower mould bottom plate
2nd, upper mould 3, lower mould 4, air accumulator 5 and hot flow path 6；The upper mould 3 is installed on baffle plate 1, and the lower mould 4 is installed on lower mould
On bottom plate 2, die cavity 9 is formed between upper mould 3 and lower mould 4, the die cavity 9 is connected with air accumulator 5, while in the side wall of die cavity 9
Provided with cast gate, die cavity 9 is connected by cast gate with hot flow path 6；It is also equipped with lifting mould oil cylinder 11 in the lower mould bottom plate 2, it is described
One end of mould jacking block 12 is lifted in the output end connection for lifting mould oil cylinder 11, the upper baffle plate 1 of other end connection of mould jacking block 12 is lifted, for controlling
The lifting of baffle plate 1 and upper mould 3 in system.
In the present embodiment, the injection mold also includes push pedal 7, and the push pedal 7 is located between lower mould bottom plate 2 and lower mould 4
And the lower section of hot flow path 6 is arranged at, it protects hot flow path by spacing and empty avoiding, and the push pedal 7, which is provided with, to be used to eject inner panel
The jacking block and thimble of product.The injection mold also includes being used for the silencer 8 for eliminating noise.
Embodiment two：
Formed product operation is carried out using the injection mold described in embodiment one, is specially：In plastic pellet polypropylene
When (PP+ glasses) is injected, 2.0t modeling amount is first molded, by the accurate loose surrender pressure of equipment, 3.5t is risen to and is foamed
Filling, reaches lightweight, high-precision intensity.When pressure reaches 0.8-2.0MPa, the molten mixture of plastic pellet and foaming agent
(barrel temperature is 260 degrees Celsius) is injected into (Ccope closing machine is with mould injection at present) delay a period of time (5-10S) after die cavity,
The gas in mould is slowly discharged by steam vent simultaneously, and then it is (mobile to be moved rearwards certain distance for the cope plate of clamping
Distance is set as product thickness, and inner panel meat thickness is 3mm), the lower mould and upper mould for making mould are separated, for foaming space extending point
Type face, die cavity expand, and the plastics in core rod start foaming and intumescing.The outward appearance epidermis of densification is formed after part cooling on its surface
(top layer is without foamed state, skin depth 0.5-0.8mm).
Embodiment three：
Using the injection mold in embodiment one and the injection moulding process in embodiment two, concrete application is carried out.
Example：Using some brand inner plate of car door of automobile as exploitation, produce and verified, not plus foaming agent studies product thickness
For t2.0mm (data below source studies substance data)
1. inner panel is not added with foaming agent average weight 595g, t=2.0mm on the right side of front door, then substance is when temporarily estimating t=1.0mm
595/2=297.5g, works as t=3.5mm, calculates that it is 297.5*3.5=1041.25g temporarily to estimate substance, loss of weight：441g.
It is average weight 377g, t=2.0mm that 2. inner panel, which is not added with foaming agent, on the right side of rear right, then substance when temporarily estimating t=1.0mm
For 377/2=188.5g, work as t=3.5mm, calculate that it is 188.5*3.5=659.75g temporarily to estimate substance, loss of weight：259g.
The basic principles, principal features and advantages of the present invention have been shown and described above.One of ordinary skill in the art
It should be appreciated that above-described embodiment protection domain that the invention is not limited in any way, all to be obtained using modes such as equivalent substitutions
The technical scheme obtained, falls within protection scope of the present invention.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Claims (10)
1. a kind of car inner plate low pressure chemical frothing injection mould, it is characterised in that it includes upper baffle plate（1）, lower mould bottom plate
（2）, upper mould（3）, lower mould（4）, air accumulator（5）And hot flow path（6）；The upper mould（3）It is installed on baffle plate（1）On, it is described
Lower mould（4）It is installed on lower mould bottom plate（2）On, upper mould（3）With lower mould（4）Between form die cavity（9）, the die cavity（9）With gas storage
Tank（5）It is connected, while die cavity（9）Side wall be provided with cast gate, die cavity（9）Pass through cast gate and hot flow path（6）It is connected；It is described
Lower mould bottom plate（2）On be also equipped with lift mould oil cylinder（11）, the act mould oil cylinder（11）Output end connection lift mould jacking block（12）'s
One end, lift mould jacking block（12）The upper baffle plate of other end connection（1）, for controlling upper baffle plate（1）With upper mould（3）Lifting.
2. car inner plate low pressure chemical frothing injection mould according to claim 1, it is characterised in that the injection mold
Also include push pedal（7）, the push pedal（7）Positioned at lower mould bottom plate（2）With lower mould（4）Between and be arranged at hot flow path（6）Lower section,
It protects hot flow path, the push pedal by spacing and empty avoiding（7）It is provided with the jacking block and thimble for being used for ejecting interior panel products.
3. car inner plate low pressure chemical frothing injection mould according to claim 1, it is characterised in that the injection mold
Also include being used for the silencer for eliminating noise（8）.
4. a kind of forming method of car inner plate low pressure chemical frothing injection mould, it is characterised in that comprise the following steps：
Step 1：Glass fiber plastic particle injection barrel proportional to foaming agent will be contained, by heater to barrel temperature and mould
Tool hot flow path is heated, and then starts start；
Step 2：Upper mould declines, while gas auxiliary equipment squeezes into gas into the die cavity of sealing；
Step 3：Upper mould starts matched moulds, and when mould cavity pressure reaches 0.8-2.0MPa, lower mould starts injection, until injection is completed,
And the 5-10S that is delayed makes the gas in mould slowly be discharged by steam vent；
Step 4：Upper mould release simultaneously lifts mould oil cylinder using lower mould and lifts upper mould and carry out pine and move back, and sensing limiter sensing mold closing reaches
Foamed during certain altitude to inner panel product space；
Step 5：Upper mould, which moves up, to be molded, and then mold jacking block, the interior injection finished goods of thimble start ejection die cavity take out inner panel
Product.
5. a kind of forming method of car inner plate low pressure chemical frothing injection mould according to claim 4, its feature exist
In the step 1, when the temperature of barrel temperature and mold hot flow reaches 260 degrees Celsius by heater, start to make
It is dynamic.
6. a kind of forming method of car inner plate low pressure chemical frothing injection mould according to claim 4, its feature exist
When the upper mould drops to die height 5mm, gas auxiliary equipment squeezes into gas into the die cavity of sealing.
7. a kind of forming method of car inner plate low pressure chemical frothing injection mould according to claim 4, its feature exist
Foamed when the sensing limiter reaches die height 3mm to inner panel product space, foamed time 6s, cool time 15s.
8. a kind of forming method of car inner plate low pressure chemical frothing injection mould according to claim 4, its feature exist
It is in the ratio of the particle containing glass fiber plastic and foaming agent：Foaming agent accounts for particle containing glass fiber plastic and foaming agent gross mass
3-5%.
9. according to a kind of forming method of car inner plate low pressure chemical frothing injection mould described in claim 8, it is characterised in that
The plastic pellet material is the polypropylene containing glass.
10. a kind of forming method of car inner plate low pressure chemical frothing injection mould according to claim 9, its feature exist
The content of glass is 20% in the plastic pellet containing glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710703898.2A CN107553808A (en) | 2017-08-16 | 2017-08-16 | Car inner plate low pressure chemical frothing injection mould and its forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710703898.2A CN107553808A (en) | 2017-08-16 | 2017-08-16 | Car inner plate low pressure chemical frothing injection mould and its forming method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107553808A true CN107553808A (en) | 2018-01-09 |
Family
ID=60973782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710703898.2A Pending CN107553808A (en) | 2017-08-16 | 2017-08-16 | Car inner plate low pressure chemical frothing injection mould and its forming method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107553808A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109049487A (en) * | 2018-09-17 | 2018-12-21 | 张家港力勤机械有限公司 | The raw material premix material device of high-pressure polyurethane foaming equipment |
| CN111805828A (en) * | 2020-07-13 | 2020-10-23 | 南京南条全兴汽车内饰系统有限公司 | Method for chemically foaming and integrally forming low-pressure belt skin of vehicle door interior trim panel |
| CN113352532A (en) * | 2021-04-28 | 2021-09-07 | 沈荣 | Quick press forming and effective demoulding device for mounting plate of air conditioner outdoor unit |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101007437A (en) * | 2007-01-18 | 2007-08-01 | 东华机械有限公司 | High speed injecting molding method by counter pressure method and chemical foaming method |
| CN101466755A (en) * | 2006-06-14 | 2009-06-24 | 亨茨曼国际有限公司 | Cross-linkable thermoplastic polyurethanes |
| CN103102583A (en) * | 2011-11-11 | 2013-05-15 | 上海杰事杰新材料(集团)股份有限公司 | Polypropylene microporous foam material and preparation method thereof |
| US9321195B2 (en) * | 2011-07-26 | 2016-04-26 | Sanoh Industrial Co., Ltd. | Method and device for producing a pipe member |
-
2017
- 2017-08-16 CN CN201710703898.2A patent/CN107553808A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101466755A (en) * | 2006-06-14 | 2009-06-24 | 亨茨曼国际有限公司 | Cross-linkable thermoplastic polyurethanes |
| CN101007437A (en) * | 2007-01-18 | 2007-08-01 | 东华机械有限公司 | High speed injecting molding method by counter pressure method and chemical foaming method |
| US9321195B2 (en) * | 2011-07-26 | 2016-04-26 | Sanoh Industrial Co., Ltd. | Method and device for producing a pipe member |
| CN103102583A (en) * | 2011-11-11 | 2013-05-15 | 上海杰事杰新材料(集团)股份有限公司 | Polypropylene microporous foam material and preparation method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109049487A (en) * | 2018-09-17 | 2018-12-21 | 张家港力勤机械有限公司 | The raw material premix material device of high-pressure polyurethane foaming equipment |
| CN111805828A (en) * | 2020-07-13 | 2020-10-23 | 南京南条全兴汽车内饰系统有限公司 | Method for chemically foaming and integrally forming low-pressure belt skin of vehicle door interior trim panel |
| CN113352532A (en) * | 2021-04-28 | 2021-09-07 | 沈荣 | Quick press forming and effective demoulding device for mounting plate of air conditioner outdoor unit |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20180109 |