CN207206919U - A kind of foaming molding mold of plastic structural part - Google Patents
A kind of foaming molding mold of plastic structural part Download PDFInfo
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- CN207206919U CN207206919U CN201621035589.XU CN201621035589U CN207206919U CN 207206919 U CN207206919 U CN 207206919U CN 201621035589 U CN201621035589 U CN 201621035589U CN 207206919 U CN207206919 U CN 207206919U
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Abstract
The utility model provides a kind of foaming molding mold of plastic structural part, belongs to plastics forming technique field.The utility model foaming molding mold includes product die cavity, heating meson passage, cooling duct, temperature-sensing element, heating and cooling controller, the heating meson passage and cooling duct are provided with electronic signal control valve, the heating is connected with the temperature-sensing element and electronic signal control valve respectively with cooling controller, and the meson passage and cooling duct of heating can adjust the temperature of the product die cavity.The beneficial effects of the utility model are：Using quick-acting heating mesons and cooling duct control, product surface gloss is realized without material flower, low stress, low-density, high-quality microporous foam, obtained product surface hardness is higher, and material internal foams evenly.
Description
Technical field
The utility model belongs to plastics forming technique field, is related to a kind of foaming molding mold, more particularly to a kind of plastics
The foaming molding mold of structural member.
Background technology
It is currently by plastic injection to metal sound equipment by traditional injection machine for plastic structural parts such as acoustic structure parts
Die for molding, the true heart of product do not have hollow structure micropore.Obtained structural member is solid construction in this way, density
Height, specific strength is low, and than great, cost is than high；And the performance for absorbing shock loading and sound insulation is general；In addition, this pass through modeling
Material injection molding is due to being high-pressure molding, and swollen mode coefficient is big in process, and product is also easy to produce flash, the output of relative injection machine
Need high pressure high energy consumption；Especially for large-scale heavy section casting, surface has shrink trace, molding cycle length, cost height.
Existing injection foaming forming technique, gas is caught in the middle in die cavity depths when foaming be present, it is difficult to is arranged
Go out, the material of melting is filled full mould from proper flow, cause scarce material, cavity or bulge, product internal stress high, easily stick up
Song deformation, surface easily produce material and spent, and the technical problem such as lackluster, the applicant is in first generation foaming technique（Patent Shen
Please number：201510498309.2 applying date 2015.08.14）, by setting flash control valve and expecting well, although solving existing
The flash for having technology to be carried out by air bleeding valve in foaming process during gas release causes product easily to produce hard-edge, mould appearance
Easily block, product easily lacks material or the problem of foaming such as cavity or bulge is uneven occurs.
But the problem of material flower is easily produced for surface, the applicant's first generation foaming technique is to pass through manual grinding
Surface material flower and spray paint are handled to solve, so that product surface has glossiness, such a solution method increases artificial and former
Expect that cost, production efficiency be not high.
Further, since being high-pressure molding, product internal stress is high, easy buckling deformation, and in first generation foaming technique, design is multiple
Mold design, which will be put, during miscellaneous product curved surface stays size to offset product buckling deformation, and difficulty is brought to design.
Utility model content
To solve the problems of the prior art, the utility model provides a kind of foaming molding mold of plastic structural part, uses
Expect the high easy buckling deformation of flower, internal stress in solving the problems, such as that surface easily produces.
The foaming molding mold of the utility model plastic structural part include product die cavity, heating meson passage, cooling duct,
Temperature-sensing element, heating and cooling controller, the heating meson passage and cooling duct are provided with electronic signal control valve, described
Heating is connected with the temperature-sensing element and electronic signal control valve respectively with cooling controller, described to heat meson passage and cold
But passage can adjust the temperature of the product die cavity.
The utility model is further improved, and the foaming molding mold also includes temperature-sensing element pipeline, the temperature-sensitive member
Part is arranged in the temperature-sensing element pipeline.
The utility model is further improved, and described heat is provided with heating element heater in meson passage, in the cooling duct
Provided with cooling medium.
The utility model is further improved, and the quantity of the heating meson passage and cooling duct is respectively multiple rows of, institute
Heating meson passage and cooling duct vertical distribution are stated, the projection on the product type cavity direction is in latticed, in product type
It is uniformly distributed at chamber, so that the temperature of product die cavity everywhere is essentially identical, so that the performance of product is more stable.
The utility model is further improved, and the foaming molding mold includes preceding mould and rear mold, is provided with the preceding mould
Preceding core rod, the rear mold is interior to be provided with rear core rod, and the product die cavity is arranged between the preceding core rod and rear core rod.
The utility model is further improved, the heating meson passage, cooling duct, temperature-sensing element be arranged on it is described before
On core rod.
The utility model is further improved, and one end of the product die cavity is provided with to be used to inject to the product die cavity and noted
The hot mouth of foaming raw material is moulded, the hot mouth is arranged on the preceding core rod, and the other end of the product die cavity, which is provided with, expects runner
With expectation well, described to expect runner provided with control valve is expected, the expectation runner and expectation well are arranged on the rear core rod.
The utility model is further improved, and runner plate is provided with above the preceding mould, and the runner plate, which is provided with, to be used to note
Enter the note cast gate of raw material, the note cast gate is connected with hot mouth.
The utility model is further improved, and is provided with panel above the runner plate, has guidance panel on the panel, institute
Guidance panel is stated with the heating with cooling controller to be connected.
The utility model is further improved, and the preceding mould and rear mold are arranged on bottom plate, between the bottom plate and rear mold
Provided with thimble fixed plate, the thimble fixed plate is provided with more than one thimble, and the thimble is connected with the product die cavity.
Compared with prior art, the beneficial effects of the utility model are：The utility model is faced by mold temperature super generating bubble
Boundary's control shaping, is controlled using quick-acting heating mesons and cooling duct, realizes product surface gloss without material flower, low stress, low close
Degree, high-quality microporous foam, obtained product surface hardness is high, material internal uniform in foaming, solves prior art and passes through people
Member's polishing surface material is spent and spray paint process, solution product return deformation warpage caused by internal stress, solution product easily shrinks
Or there is the problem of foaming such as hollow big hole or bulge is uneven, while also reduce die steel intensity requirement and be manufactured into
This.
Brief description of the drawings
Fig. 1 is the utility model section structural representation；
Fig. 2 is Fig. 1 A portions enlarged drawing；
Fig. 3 is the preceding core rods of Fig. 1 and rear core rod enlarged drawing.
Embodiment
The utility model is described in further details with reference to the accompanying drawings and examples.
As shown in Figure 1-Figure 3, the foaming molding mold of plastic structural part of the present utility model（Abbreviation mould）Including product
Die cavity 3, heating meson passage 5, cooling duct 4, temperature-sensing element, heating and cooling controller, the He of heating meson passage 5
Cooling duct 4 is provided with electronic signal control valve, the heating and cooling controller respectively with the temperature-sensing element and e-mail
Number control valve is connected, and the heating meson passage 5 can heat to the product die cavity, and the cooling duct 4 can be to described
Product die cavity cools, so as to adjust the temperature of the product die cavity.This example is provided with temperature-sensing element pipeline 6, and the temperature-sensing element is set
Put in the temperature-sensing element pipeline 6.
Heating element heater is provided with the heating meson passage 5 of this example, cooling medium, the electricity are provided with the cooling duct 4
Subsignal control valve is used to control the heating element heater or cooling medium to work or close.
The quantity of this example heating meson passage 5 and cooling duct 4 be respectively it is multiple rows of be arranged in parallel, the heating meson passage
5 and the vertical distribution of cooling duct 4, the projection of the heating meson passage 5 and cooling duct 4 on the direction of product die cavity 3
In latticed.
This example foaming molding mold also includes preceding mould 1 and rear mold 2, and the preceding mould 1 is arranged on the top of the rear mold 2, institute
Preceding core rod 101 is provided with before stating 1 in mould, is provided with rear core rod 21 in the rear mold 2, the product die cavity 3 is arranged on the preceding core rod
Between 101 and rear core rod 21.Certainly, groove can be set to form product type chamber 3 on the preceding core rod 101, can also be in rear mold
Set groove to form product type chamber 3 on core 21, one can also be set respectively in preceding core rod 101 and the correspondence position of rear core rod 21 respectively
Part recess forms product die cavity 3.
This example sets a part of groove to form product type chamber 3 respectively in preceding core rod 101 and the correspondence position of rear core rod 21.It is described
Heating meson passage 5, cooling duct 4, temperature-sensing element are arranged on the preceding core rod 101, close to the product die cavity 3.
One end of this example product die cavity 3 is provided with the hot mouth 7 for being used for that injection foaming raw material to be injected to the product die cavity 3, institute
State hot mouth 7 to be arranged on the preceding core rod 101, this example hot mouth 7 is needle-valve type hot nozzle.
The other end of the product die cavity 3, which is provided with, to be expected runner 22 and expects well 23, and the expectation runner 22 is provided with pre-
Expect control valve, the expectation runner 22 and expectation well 23 are arranged on the rear core rod 21.So that the expectation He of runner 22
Expect that the height of well 23 is less than the height of the hot mouth 7, be advantageous to injection foaming raw material being uniformly injected into product die cavity 3.
In addition, using this technical scheme so that expect that runner 22 be located at hot mouth 7 and tried one's best remote place so that molten state injection foaming original
Material is expelled from flash into expectation well 23 according to flow direction during injection fillers, is advantageous to reduce answering for foamed forming process
Power, it is easy to form more uniform microporous foam structure.
As one embodiment of the present utility model, the preceding mould 1 and rear mold 2 of this example are arranged on bottom plate 12, the bottom plate
Thimble fixed plate 11 is provided between 12 and rear mold 2, the thimble fixed plate 11 is provided with multiple thimbles 10, wherein there is part thimble
10 are connected with the product die cavity 3, are advantageous to the plastic structural part ejection depanning of shaping.
In addition, being provided with runner plate 8 above the preceding mould 1, the runner plate 8 is provided with the note for being used to inject raw material and poured
Mouthful, the note cast gate is connected with hot mouth 7.Panel 9 is provided with above the runner plate 8, has guidance panel on the panel 9,
The guidance panel is connected with the heating with cooling controller, described so as to control by the setting of the guidance panel
Heating-up temperature and chilling temperature.
The utility model is comprised the following steps using the forming method of above-mentioned foaming molding mold：
S1 ：Foaming molding mold is closed, foaming molding mold is heated up to the first design temperature；
S2：Molten state injection foaming raw material containing foaming agent or foamed gas is injected into product die cavity, and made
It is 2000~20,000 psi in injection pressure（13.79~137.9MPa）Between, it is fully filled with product die cavity, Ran Houtong
Shi Zhihang steps S3 and step S4；
S3：Release foaming space, independent wells are formed after the molten state injection foaming raw material foaming of the product type intracavitary；
S4：Stop heating, open the electronic signal control valve cooling of cooling duct, temperature is down to the second design temperature, cold
But shape.
The utility model is before the molten state injection foaming raw material injects the product die cavity 3, first to the speed of product die cavity 3
Effect preheating, make its temperature super generating bubble critical, so that molten state injection foaming raw material will not be because just having run into product die cavity 3 during injection
Temperature is low and makes its shrinkage, prevents from being introduced into the inner surface low temperature of part contact product die cavity 3 and first solidification phenomenon occur, so as to
Make the molten state injection foaming raw material with molten state well into the product die cavity 3, foam more uniform, product internal stress
It is lower.
After the molten state injection foaming raw material is fully filled with product die cavity 3, stop heating, then release foaming space
Meanwhile open cooling duct and cool down the product die cavity 3, make the fast cooling of product die cavity 3, be advantageous to product external surfaces
Sizing, so that product surface hardness is higher, no material is spent and carries high glaze.
In step s3, release foaming space is to expect that control valve is realized by opening, and the molten state injection foaming is former
Material after foaming and intumescing, is expected in well in the product die cavity from expecting that control valve opening is expressed into.Solve prior art to pass through
The flash that air bleeding valve is carried out in foaming process during gas release causes product easily to produce hard-edge, mould, and easily blocking etc. is asked
Topic.
As a preferred embodiment of this example, in step sl, first design temperature is 80 DEG C ~ 300 DEG C；In step
In rapid S4, second design temperature is 30 DEG C ~ 70 DEG C.
Based on forming method of the present utility model, as a specific embodiment, this example forming method specifically includes as follows
Step：
A：Add in the feed in foaming agent or screw rod and inject foamed gas, the raw material of this example refers to thermoplastic plastic；
B：Add the raw material into dehumidifier and dry, drying temperature and the physical property table requirement of basis of time raw material manufacturer；
C：The plasticizing melt adhesive temperature of injection machine is set, makes it in the range of raw material molten point；
D：Foaming molding mold is arranged on injection machine；
E：Heating meson passage 5 and cooling duct 4 are installed on foaming molding mold, added in the heating meson passage 5
Enter to heat meson, cooling medium is added in the cooling duct 4；Then temperature-sensing element is installed, this example heating meson is heating
When cooling duct 4 stop cooling, on the contrary, cooling duct 4 work when heating stop；
F：Guan Bi mould, mould start to be heated up to 80 DEG C ~ 300 DEG C it is Celsius between, between preferably 80 DEG C ~ 200 DEG C are Celsius；
G：The injection foaming raw material of molten condition is continuously injected into die cavity, gas macromolecule fused mass is in high speed and high pressure
Under be fully filled with die cavity, the injection pressure of this example is between 2000~20,000 psi；
H：Expect that control valve opens release foaming space, gas macromolecule fused mass is depressured, largely satiated in melt suddenly
Start to separate out foaming with gas, the fused mass after expansion is from expecting that controlling valve opening to flow out to expects in well, and fused mass is sent out in die cavity
Independent wells are formed after bubble；
I：The electronic signal control valve of cooling duct brings into operation after the completion of injection, cold between being cooled to 30 DEG C ~ 70 DEG C
But shape, die sinking, product depanning after sizing.
The first generation foaming technique of the applicant, in view of the shortcomings of the prior art, a kind of microporous foam modeling of utility model
Expect the foaming forming technique of structural member, there is provided to the design flexibility of acoustic structure, such as：Complicated, heavv section part
Easily cause indenture or warpage, the even design of section became uneven, an ideal solution party of microporous foam forming technology
Case.Although its processing mode is similar to injection molding, because foamed plastic is due to the presence of bubble, therefore it is low than strong with density
Degree is high, can absorb impact cultivation lotus, heat-insulated, sound insulation and so that modeling product weight saving 5%~20%.And constructional foaming is configured to one
Secondary shaping, and realize the design of variation.Especially for large-scale thick article, such as casing of sound equipment, auto parts machinery, Medical Devices
Structural member etc., frothing injection, which can save material, reduces cost.
The utility model makes the bubble Critical Control shaping of mold temperature super generating, realizes product surface gloss by controlling temperature
Without material flower, low stress, low-density, high-quality microporous foam, obtained product surface hardness is high, material internal uniform in foaming.This
Outside, the advantages of also having had both first generation foaming technique, simultaneously solves the defects of the first generation technique：
1st, internal stress is smaller, and deformation warpage controls well, makes mold design simpler, reliable.Originally complex designing
Mold design, which will be put, during product curved surface stays size to offset product buckling deformation, and difficulty is brought to design；
2nd, surface bloom is spent without material, is solved prior art and is expected that flower and spray paint are handled by manual grinding surface.Simplify
Production technology, improves product quality, reduces the artificial and cost of raw material, improves production efficiency.
In addition, the utility model makes temperature too high, reduces mould by setting heating meson passage and cooling duct
Have steel strength requirement and manufacturing cost.
Embodiment described above is better embodiment of the present utility model, and it is new not to limit this practicality with this
The specific implementation scope of type, the scope of the utility model includes being not limited to present embodiment, all according to the utility model
The equivalence changes made are in the scope of protection of the utility model.
Claims (10)
- A kind of 1. foaming molding mold of plastic structural part, it is characterised in that：Including product die cavity, heating meson passage, cooling Passage, temperature-sensing element, heating and cooling controller, the heating meson passage and cooling duct control provided with electronic signal Valve, the heating are connected with the temperature-sensing element and electronic signal control valve respectively with cooling controller, the heating meson Passage and cooling duct can adjust the temperature of the product die cavity.
- 2. foaming molding mold according to claim 1, it is characterised in that：The foaming molding mold also includes temperature-sensitive member Part pipeline, the temperature-sensing element are arranged in the temperature-sensing element pipeline.
- 3. foaming molding mold according to claim 2, it is characterised in that：Heating unit is provided with the heating meson passage Part, cooling medium is provided with the cooling duct.
- 4. foaming molding mold according to claim 3, it is characterised in that：The heating meson passage and cooling duct Quantity is respectively multiple rows of, the heating meson passage and cooling duct vertical distribution, the projection on the product type cavity direction In latticed.
- 5. according to the foaming molding mold described in claim any one of 1-4, it is characterised in that：The foaming molding mold includes Preceding mould and rear mold, are provided with preceding core rod in the preceding mould, and the rear mold is interior to be provided with rear core rod, the product die cavity be arranged on it is described before Between core rod and rear core rod.
- 6. foaming molding mold according to claim 5, it is characterised in that：The heating meson passage, cooling duct, sense Warm element is arranged on the preceding core rod.
- 7. foaming molding mold according to claim 6, it is characterised in that：One end of the product die cavity, which is provided with, to be used for institute State the hot mouth of product die cavity injection injection foaming raw material, the hot mouth is arranged on the preceding core rod, the product die cavity it is another One end, which is provided with, to be expected runner and expects well, and the expectation runner, which is provided with, expects control valve, described to expect runner and expect that well is set Put in the rear on core rod.
- 8. foaming molding mold according to claim 7, it is characterised in that：Runner plate, the stream are provided with above the preceding mould Guidance tape is provided with the note cast gate for being used for injecting raw material, and the note cast gate is connected with hot mouth.
- 9. foaming molding mold according to claim 8, it is characterised in that：Panel, the face are provided with above the runner plate There is guidance panel on plate, the guidance panel is connected with the heating with cooling controller.
- 10. foaming molding mold according to claim 5, it is characterised in that：The preceding mould and rear mold are arranged on bottom plate, Be provided with thimble fixed plate between the bottom plate and rear mold, the thimble fixed plate is provided with more than one thimble, the thimble with The product die cavity connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621035589.XU CN207206919U (en) | 2016-08-31 | 2016-08-31 | A kind of foaming molding mold of plastic structural part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621035589.XU CN207206919U (en) | 2016-08-31 | 2016-08-31 | A kind of foaming molding mold of plastic structural part |
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| CN207206919U true CN207206919U (en) | 2018-04-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI719309B (en) * | 2018-05-16 | 2021-02-21 | 寶成工業股份有限公司 | Foaming mold device |
-
2016
- 2016-08-31 CN CN201621035589.XU patent/CN207206919U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI719309B (en) * | 2018-05-16 | 2021-02-21 | 寶成工業股份有限公司 | Foaming mold device |
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