CN208992991U - A kind of back-pressure injection mold sealing structure - Google Patents
A kind of back-pressure injection mold sealing structure Download PDFInfo
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- CN208992991U CN208992991U CN201821819527.7U CN201821819527U CN208992991U CN 208992991 U CN208992991 U CN 208992991U CN 201821819527 U CN201821819527 U CN 201821819527U CN 208992991 U CN208992991 U CN 208992991U
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Abstract
The utility model discloses a kind of back-pressure injection mold sealing structure, including locating ring, solid plates, impression bolster is fixed on solid plate, cavity plate, the fixed core fixing plate of moving template and mandril fixed plate are installed on impression bolster, core plate and core plate are installed on core fixing plate；Impression bolster, cavity plate and mold parting surface process air flue；Sealed groove is processed in the core plate or cavity plate of mold parting surface position, places the first sealing ring in groove and mold parting surface is sealed；Mandril is designed using boss structure and cone structure, forms the first sealing structure and second seals structure of mandril with the cone match of the conical surface of core plate and core plate respectively；In the periphery of all mandrils, sealed groove is processed in core plate and core plate contact surface, places the second sealing ring, the third sealing structure as mandril in groove.The utility model can extend die life while meeting mold cavity gas pressurized and unloading pressure request, reduce subsequent repair a die.
Description
Technical field
The utility model relates to a kind of sealing structure of mold more particularly to a kind of back-pressure injection mold sealing structures.
Background technique
Foam injection molding technology is to save the novel injection molding technique that raw material grow up as the main purpose.This technology
The usage amount that raw material can not only be reduced, also eliminates the residual stress of shaped article, and the contraction for reducing molding plastic becomes
Shape improves the dimensional accuracy of product.However, there are gas trace defect, nothings for the product surface of common frothing injection technological forming
Method meets the surface quality requirements of looking products, and need to carry out secondary treatment rear through processes such as polishing, polishing and sprayings can be used as
Looking products use.
Currently, gas back pressure technology be proven eliminate frothing injection product surface gas trace defect most efficient method it
One.Back-pressure frothing injection technique and the most important difference of conventional frothing injection technique are mould type intracavity gas in forming process
The control strategy of pressure.In conventional frothing injection technique, the gas in mold cavity is automatic with the carry out of melt filling process
Discharge, and back-pressure frothing injection technique then uses a kind of dynamic mold type cavity gas based on Quick-pressing and fast pressure relief technology
Compressive stress control strategy.During back-pressure foam injection molding, mold cavity gas pressure change range is 0MPa~20MPa.
From the foregoing, it will be observed that during back-pressure foam injection molding in mold cavity the variation of gas pressure to the leakproofness of mold
More stringent requirements are proposed for energy.Qingdao HaiXin Molds Co., Ltd disclosed in China that a kind of entitled " one kind is used in 2012
The patented technology of the sealing structure of back-pressure injection mold " (publication number: CN202556678U).The back-pressure injection mould that this patent proposes
The sealing structure of tool includes quiet module, dynamic model block, quiet template and moving template, is arranged on the die joint between quiet template and moving template
There is the first sealing ring, be provided with gas sealing plate on the outside of quiet template, third sealing ring is provided between gas sealing plate and quiet template,
Mandril is sealed using axial sealing ring.Above-mentioned patented technology can preferably solve the sealing problem of back-pressure injection mold,
But in injection moulding process, each molding cycle mandril is once moved back and forth, this results in mandril sealing ring easily to grind
Loss effect, causes mold sealability to decline, significantly reduces the service life of mold.
Utility model content
The characteristics of for back-pressure injection moulding process, the utility model proposes a kind of back-pressure injection mold sealing structures, that is, use
The method that sealing ring sealing and conical surface seal combine, to improve the service life of back-pressure injection mold.Its specific embodiment party
Method are as follows: the ejector rod part of periodic reverse motion is sealed using cone structure in back-pressure injection mold, mold cavity parting
Face and the corresponding other structures of type chamber are sealed using sealing ring, and the above method can eliminate mechanical movement to the mill of sealing ring
Damage, greatly improves the service life of back-pressure injection mold.
To achieve the above object, the utility model adopts the following technical solutions:
A kind of back-pressure injection mold sealing structure mainly includes locating ring, solid plate, impression bolster, cavity plate, type core
Plate, core plate, core fixing plate, mandril, mandril fixed plate and moving template.
The cavity plate and core plate form mold cavity and type chamber die joint, impression bolster, cavity plate and mold point
Equal processing gas passes in and out the air flue of mold cavity on type face, installs air flue interface on the air flue of impression bolster, air flue interface can
Using threaded connection or the form of flanged joint, equipment, pressure sensor and pressure gauge etc. are controlled even with the external gas pressure
It connects.
The first sealed groove is machined on the core plate (or cavity plate), the first sealed groove is located at mold cavity, mould
Have the periphery of die joint air flue and mandril, the sealing that the first sealing ring realizes mold parting surface is placed in the first sealed groove.
The mandril is designed using boss structure and biconical surface structure, and boss structure can increase ejection area, improves ejection
Extend the mandril service life while efficiency；Biconical surface structure with the core plate conical surface and core plate cone match, realizes mandril respectively
The sealing at position.
The core plate is machined with the first sealing cone, with mandril boss cone match, forms the first sealing knot of mandril
Structure.
The core plate is machined with the second sealing cone between core fixing plate and core plate thereon, with mandril
Cone match forms the second seals structure of mandril.
The second sealed groove is machined on the core plate (or core plate), the second sealed groove is located at all mandrils
Periphery, the interior third sealing structure placed the second sealing ring and form mandril of the second sealed groove.
The mandril installation through-hole minimum diameter processed in the core plate is larger than the second sealing cone maximum gauge, with
Ensure that mandril being capable of normal mounting.
The utility model has the beneficial effects that the pressurization and release in back-pressure injection moulding process to mold cavity gas can be realized
It is required that, it is ensured that mold sealing is air tight in forming process.Using the back-pressure injection mold sealing structure of proposition, mold can improved
While sealing performance, effectively extend the service life of mold, reduces the subsequent process that repairs a die, reduce resource and artificial wave
Take.
Detailed description of the invention
Fig. 1 is a kind of back-pressure injection mold sealed structural schematic diagram of the utility model.
Fig. 2 is the partial enlargement diagram of Fig. 1 dotted portion.
Wherein 1. locating ring, 2. solid plates, 3. impression bolsters, 4. cavity plates, 5. core plates, 6. core plates, 7. types
Core fixed plate, 8. mandrils, 9. mandril fixed plates, 10 moving templates, 11. air flue interfaces, 12. air flues, 13. first sealing rings, 14.
Two sealing rings, 15. first sealing cones, 16. second sealing cones.
Specific embodiment
A kind of back-pressure injection mold sealing structure combined with Figure 1 and Figure 2, including locating ring 1, solid plate 2 are solid on solid plate 2
Determine impression bolster 3, cavity plate 4, the fixed core fixing plate 7 of moving template 10 and mandril fixed plate 9 be installed on impression bolster 3,
Core plate 5 and core plate 6 are installed on core fixing plate 7；Cavity plate 4 and core plate 5 form mold cavity and mold parting surface,
The air flue 12 of equal processing gas disengaging mold cavity on impression bolster 3, cavity plate 4 and mold parting surface, on impression bolster 3
Air flue air flue interface 11 is installed, the external gas pressure control equipment, pressure sensor and pressure gauge etc. can pass through air flue interface
11 connect with mold air flue；Sealed groove is processed in the cavity plate 4 or core plate 5 of mold parting surface position, is placed in groove
First sealing ring 13 realizes the sealing to mold parting surface；Mandril 15 is designed using boss structure and cone structure, respectively with type
The conical surface of core plate 5 and the cone match of core plate 6 form the first sealing structure and second seals structure of mandril；On all tops
The periphery of bar processes sealed groove on 6 contact surface of core plate 5 and core plate, the second sealing ring 14 is placed in groove, as top
The third sealing structure of bar.
The impression bolster 3, cavity plate 4 air flue 12 using drilling by the way of process, section be circle, diameter model
It encloses: 1~10mm.
The type of attachment of the air flue interface 11 is threaded connection or flanged joint.
The groove section of first sealing ring 13 and the second sealing ring 14 can be semicircle or rectangle, seal diameter model
It encloses: 3~10mm.
The range of taper of first sealing cone 15 and the second sealing cone 16: 30 °~60 °.
The related technology contents that do not address in aforesaid way are taken or are used for reference prior art and can be realized.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but it is not practical new to this
The protection scope of type is limited, those skilled in the art should understand that, on the basis of the technical solution of the utility model
On, the various modifications or variations that can be made by those skilled in the art with little creative work still in the utility model
Within protection scope.
Claims (6)
1. a kind of back-pressure injection mold sealing structure, characterized in that including locating ring, solid plate, fixed chamber is solid on solid plate
Fixed board is installed cavity plate, the fixed core fixing plate of moving template and mandril fixed plate on impression bolster, is installed on core fixing plate
Core plate and core plate；Cavity plate and cavity plate form mold cavity and mold parting surface, impression bolster, cavity plate and mould
Has the air flue of the equal processing gas disengaging mold cavity of die joint；It is processed in the core plate or cavity plate of mold parting surface position close
Groove is sealed, sealing of the first sealing ring realization to mold parting surface is placed in groove；Mandril uses boss structure and cone structure
Design, by conical surface seal and sealing ring sealing combine in the way of, realize the sealing of mandril.
2. a kind of back-pressure injection mold sealing structure as described in claim 1, characterized in that the air flue peace on impression bolster
Air flue interface is filled, the external gas pressure control equipment, pressure sensor and pressure gauge etc. can pass through air flue interface and mold air flue
Connection.
3. a kind of back-pressure injection mold sealing structure as described in claim 1, characterized in that processed in core plate or cavity plate
There is the first sealed groove, the first sealed groove is located at the periphery of mold cavity, mold parting surface air flue and mandril, and the first sealing is recessed
The sealing that the first sealing ring realizes mold parting surface is placed in slot.
4. a kind of back-pressure injection mold sealing structure as described in claim 1, characterized in that the mandril peace processed in core plate
Dress through-hole minimum diameter is larger than the second sealing cone maximum gauge.
5. a kind of back-pressure injection mold sealing structure as described in claim 1, characterized in that two conical surfaces of mandril respectively with
The core plate conical surface and core plate cone match form the first sealing structure and second seals structure of mandril.
6. a kind of back-pressure injection mold sealing structure as described in claim 1, characterized in that core plate and core plate contact
Sealed groove is processed on face, places the second sealing ring, the third sealing structure as mandril in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821819527.7U CN208992991U (en) | 2018-11-06 | 2018-11-06 | A kind of back-pressure injection mold sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821819527.7U CN208992991U (en) | 2018-11-06 | 2018-11-06 | A kind of back-pressure injection mold sealing structure |
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| Publication Number | Publication Date |
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| CN208992991U true CN208992991U (en) | 2019-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821819527.7U Active CN208992991U (en) | 2018-11-06 | 2018-11-06 | A kind of back-pressure injection mold sealing structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111136875A (en) * | 2018-11-06 | 2020-05-12 | 临沂大学 | Back pressure injection mold seal structure |
-
2018
- 2018-11-06 CN CN201821819527.7U patent/CN208992991U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111136875A (en) * | 2018-11-06 | 2020-05-12 | 临沂大学 | Back pressure injection mold seal structure |
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