CN112045953A - Spliced wear-resistant heat-insulation valve needle hot nozzle system - Google Patents
Spliced wear-resistant heat-insulation valve needle hot nozzle system Download PDFInfo
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- CN112045953A CN112045953A CN202010871309.3A CN202010871309A CN112045953A CN 112045953 A CN112045953 A CN 112045953A CN 202010871309 A CN202010871309 A CN 202010871309A CN 112045953 A CN112045953 A CN 112045953A
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- hot nozzle
- valve needle
- wear
- main body
- valve
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- 238000009413 insulation Methods 0.000 title claims description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 10
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000000576 coating method Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 8
- 229910000851 Alloy steel Inorganic materials 0.000 abstract description 6
- 206010053615 Thermal burn Diseases 0.000 abstract description 5
- 238000012545 processing Methods 0.000 abstract description 5
- 239000003292 glue Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910001315 Tool steel Inorganic materials 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 229920000426 Microplastic Polymers 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
- B29C45/28—Closure devices therefor
- B29C45/2806—Closure devices therefor consisting of needle valve systems
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/27—Sprue channels ; Runner channels or runner nozzles
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses a spliced wear-resistant heat-insulating valve needle hot nozzle system which comprises a hot nozzle main body, a heating sleeve, a hot nozzle core and a valve needle assembly, wherein the heating sleeve is arranged on the outer side of the circumference of the hot nozzle main body; the valve needle assembly comprises a valve rod arranged inside the hot nozzle main body, one end of the valve rod is connected with a valve needle through a fixing pin, and the surface of the valve needle is provided with a heat-insulating wear-resistant layer. Has the advantages that: through dividing into valve needle bar and needle head two parts with the needle, the needle head adopts the lower alloy steel material of coefficient of heat conduction to plate the needle head and separate the wear-resistant coating processing of heat, reach wear-resisting, thermal-insulated effect, and then solved the easy wearing and tearing of needle head, product deckle edge, gluey mouthful scald, the problem of hot impression that the high temperature leads to.
Description
Technical Field
The invention relates to the technical field of hot runners, in particular to a hot nozzle system of a spliced wear-resistant heat-insulating valve needle.
Background
Hot runners are systems of heating assemblies used in injection molds to inject molten plastic pellets into the mold cavity. The hot runner mold is a new structure in which the runner and the runner of the conventional mold or the three-plate mold are heated, and the runner do not need to be taken out for each molding. The hot nozzle system is an important component of the hot runner, and the needle valve hot nozzle applied to the hot runner at present has the following defects in the use process: 1. the head part of the valve needle is not subjected to protection treatment, the head part of the valve needle is not wear-resistant and is easy to wear, and a glue opening is easy to generate rough edges and other poor products; 2. the head of the valve needle is directly contacted with the core and the high-temperature molten plastic in the flow channel, so that the temperature of the head of the valve needle is too high, the glue opening of a product is easily scalded, and the glue opening generates hot stamping and other poor products.
An effective solution to the problems in the related art has not been proposed yet.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a spliced wear-resistant heat-insulation valve needle hot nozzle system, which divides a valve needle into a valve needle rod and a valve needle head, wherein the valve needle head is made of alloy steel material with a lower heat conduction coefficient, and is plated with a heat-insulating wear-resistant coating to achieve the effects of wear resistance and heat insulation, so that the problems of easy wear of the valve needle head and product burrs, glue opening scalding and hot marks caused by overhigh temperature are solved, and the technical problems in the prior related art are solved.
Therefore, the invention adopts the following specific technical scheme:
a spliced wear-resistant heat-insulation valve needle hot nozzle system comprises a hot nozzle main body, a heating sleeve, a hot nozzle core and a valve needle assembly, wherein the heating sleeve is arranged on the outer side of the circumference of the hot nozzle main body; the valve needle assembly comprises a valve rod arranged inside the hot nozzle main body, one end of the valve rod is connected with a valve needle through a fixing pin, and the surface of the valve needle is provided with a heat-insulating wear-resistant layer.
Further, for the convenience of replacement and maintenance of the valve needle head, one end, close to the valve needle head, of the valve rod is provided with an insertion block, a pin hole is formed in the insertion block, a plurality of grooves are evenly formed in the outer side of the circumference of the valve needle head, a cavity is formed in the end face, facing the valve rod, of the valve needle head, and through holes are symmetrically formed in the side wall of the cavity.
Further, in order to make the hot mouth core can be firm install in hot mouth main part, the one end circumference outside of hot mouth main part is provided with spline one, one side of spline one and the excircle that is located hot mouth main part are provided with the string platform, the one end that spline one was kept away from to hot mouth main part is provided with boss one, the shoulder hole has been seted up along the axis in the hot mouth main part, the constant diameter section that the shoulder hole includes, the notch has been seted up to the one end of constant diameter section, the one end that the notch was kept away from to the constant diameter section is provided with the reducing section, the lateral wall of reducing section is provided with spline two.
Further, in order to increase the sealing effect between the hot nozzle core and the hot nozzle main body, the outer circle of the hot nozzle core is provided with a third spline, one side of the third spline is provided with a second boss, one side of the second boss departing from the third spline and the outer circle of the hot nozzle core are in fillet transition, the hot nozzle core is provided with a tapered hole along the axis, and the diameter of the tapered hole is gradually reduced by the left end to the right end of the hot nozzle core.
Furthermore, in order to solve the problem of high temperature of the valve needle head, the thickness of the heat-insulating wear-resistant layer is 0.005 mm-0.03 mm.
The invention has the beneficial effects that:
(1) through dividing into valve needle bar and needle head two parts with the needle, the needle head adopts the lower alloy steel material of coefficient of heat conduction to plate the needle head and separate the wear-resistant coating processing of heat, reach wear-resisting, thermal-insulated effect, and then solved the easy wearing and tearing of needle head, product deckle edge, gluey mouthful scald, the problem of hot impression that the high temperature leads to.
(2) Alloy tool steel, stainless steel and titanium alloy steel with the heat conductivity coefficient lower than 20W/mK are used as materials of the valve needle, the use hardness requirement reaches HRC55-65, the temperature of the head of the valve needle can be effectively reduced, and the problems of scalding and hot stamping of a glue opening are solved.
(3) The wear-resistant and heat-insulating coating material with the thickness of 0.005 mm-0.03 mm is plated on the surface of the head of the valve needle, so that the wear resistance of the valve needle is improved by more than two times, and the problems of easy wear of the head of the valve needle, short service life and easy generation of burrs are solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a spliced wear-resistant heat-insulating valve needle hot nozzle system according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a hot nozzle body of a spliced wear-resistant heat-insulating valve needle hot nozzle system according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a hot nozzle core of a spliced wear-resistant heat-insulation valve needle hot nozzle system according to an embodiment of the invention;
FIG. 4 is a schematic structural diagram of a valve needle assembly of a spliced wear-resistant heat-insulating valve needle hot nozzle system according to an embodiment of the invention;
fig. 5 is a schematic structural diagram of a valve needle head of a spliced wear-resistant heat-insulating valve needle hot nozzle system according to an embodiment of the invention.
In the figure:
1. a hot nozzle body; 101. a first spline; 102. hanging a table; 103. a first boss; 104. a stepped hole; 105. a constant diameter section; 106. a notch; 107. a diameter-changing section; 108. a second spline; 2. heating a jacket; 3. a hot nozzle core; 301. a third spline; 302. a second boss; 303. a tapered hole; 4. a valve needle assembly; 5. a valve stem; 6. a fixing pin; 7. a valve needle; 8. a heat insulating wear resistant layer; 9. inserting a block; 10. a pin hole; 11. a groove; 12. a cavity; 13. and a through hole.
Detailed Description
For further explanation of the various embodiments, the drawings which form a part of the disclosure and which are incorporated in and constitute a part of this specification, illustrate embodiments and, together with the description, serve to explain the principles of operation of the embodiments, and to enable others of ordinary skill in the art to understand the various embodiments and advantages of the invention, and, by reference to these figures, reference is made to the accompanying drawings, which are not to scale and wherein like reference numerals generally refer to like elements.
According to an embodiment of the invention, a spliced wear-resistant heat-insulation valve needle hot nozzle system is provided.
The present invention will be further described with reference to the accompanying drawings and specific embodiments, as shown in fig. 1 to 5, a spliced wear-resistant heat-insulating valve needle hot nozzle system according to an embodiment of the present invention includes a hot nozzle main body 1, a heating jacket 2, a hot nozzle core 3 and a valve needle assembly 4, the heating jacket 2 is disposed on the outer side of the circumference of the hot nozzle main body 1, the hot nozzle core 3 is disposed on the inner side of one end of the hot nozzle main body 1, the valve needle assembly 4 is disposed in the hot nozzle core 3, and one end of the valve needle assembly 4, which is far away from the hot nozzle core 3, penetrates through the hot nozzle main body 1 and extends to the outside of the hot; the valve needle assembly 4 comprises a valve rod 5 arranged inside the hot nozzle main body 1, one end of the valve rod 5 is connected with a valve needle 7 through a fixing pin 6, and a heat insulation wear-resistant layer 8 is arranged on the surface of the valve needle 7, wherein the valve needle 7 is made of alloy tool steel with a heat conductivity coefficient lower than 20W/mK, stainless steel, titanium alloy steel and other materials, the use hardness requirement reaches HRC55-65, and the hardness requirement of the valve rod 5 is about five degrees smaller than that of the valve needle 7.
With the help of above-mentioned scheme, fall into valve needle bar and needle head two parts with the needle, the needle head adopts the lower alloy steel material of heat conduction coefficient to plate the needle head and separate the wear-resistant coating processing of heat, reach wear-resisting, thermal-insulated effect, and then solved the easy wearing and tearing of needle head, product deckle edge, gluey mouth scald, the problem of hot impression that the high temperature leads to.
In one embodiment, an insertion block 9 is arranged at one end of the valve rod 5 close to the valve needle 7, a pin hole 10 is formed in the insertion block 9, a plurality of grooves 11 are uniformly formed in the outer side of the circumference of the valve needle 7, a cavity 12 is formed in one end face of the valve needle 7 facing the valve rod 5, through holes 13 are symmetrically formed in the side wall of the cavity 12, so that the through hole 9 is matched with the cavity 12, the through hole 13 is aligned with the pin hole 10, the fixing pin 6 is fixedly connected, the valve needle 7 is convenient to replace and maintain, and in addition, when the valve needle 7 is specifically applied, the valve needle 7 is connected with the valve rod 5 in multiple modes, such as:
the first scheme is as follows: the head of the valve needle is in interference fit by adopting a thermal expansion and cold contraction process, and is fixed by a pin to prevent falling off;
scheme II: the anti-loosening threaded connection is adopted, so that the anti-loosening threaded connection is not easy to loosen after being screwed down;
the third scheme is as follows: the welding connection is realized by adopting sliding fit welding, and the structure is integrated and firm without looseness;
and the scheme is as follows: performing high-temperature curing treatment after 3D printing;
scheme one and scheme two are easily changed, and are with low costs, and scheme three and scheme four sound construction, but the maintenance degree of difficulty is big.
In one embodiment, a first spline 101 is arranged on the outer side of the circumference of one end of the hot nozzle main body 1, a hanging table 102 is arranged on one side of the first spline 101 and on the outer circle of the hot nozzle main body 1, a first boss 103 is arranged on one end, away from the first spline 101, of the hot nozzle main body 1, a stepped hole 104 is formed in the hot nozzle main body 1 along the axis, an equal-diameter section 105 is included in the stepped hole 104, a notch 106 is formed in one end of the equal-diameter section 105, a reducing section 107 is arranged on one end, away from the notch 106, of the equal-diameter section 105, and a second spline 108 is arranged on the side wall of the reducing section 107, so that the second spline 108 is matched with the third spline 301, the hot nozzle core 3 can be firmly installed in the hot nozzle main body 1, and.
In one embodiment, the outer circle of the hot nozzle core 3 is provided with a third spline 301, one side of the third spline 301 is provided with a second boss 302, one side of the second boss 302 departing from the third spline 301 is in fillet transition with the outer circle of the hot nozzle core 3, the hot nozzle core 3 is provided with a tapered hole 303 along the axis, the diameter of the tapered hole 303 is gradually decreased from the left end to the right end of the hot nozzle core 3, so that the end surface of the hot nozzle core 3 is matched with the step surface of the reducing section 107 on the hot nozzle body 1 to form a sealing point, the inner side wall of the first boss 103 side is matched with the outer circle between the third spline 301 and the second boss 302 to form a sealing point, and further the sealing effect between the hot nozzle core 3 and the hot nozzle body 1 is.
In one embodiment, the thickness of the heat-insulating wear-resistant layer 8 is 0.005 mm-0.03 mm, and after the valve needle head 7 is plated with the heat-insulating coating, the temperature of the valve needle head can be reduced by 55% -65% through the heat-insulating coating, so that the problem of high temperature of the valve needle head is solved.
For the convenience of understanding the technical solutions of the present invention, the following detailed description will be made on the working principle or the operation mode of the present invention in the practical process.
When in actual application, cooperate with cavity 12 through inserted block 9, and make through-hole 13 align with cotter hole 10, carry out fixed connection through fixed pin 6, and then make things convenient for the change and the maintenance of valve syringe needle 7, it is different to utilize different material heat conduction coefficients, divide into valve needle bar and needle first two parts to the needle, the needle head adopts the lower alloy steel material of heat conduction coefficient, and plate the needle head and separate the wear and tear coating processing of heat, reach wear-resisting, thermal-insulated effect, in order to solve the easy wearing and tearing of needle head, the product deckle edge that the high temperature leads to, glue mouthful scald, the problem of hot impression.
In summary, according to the above technical solution of the present invention, the insertion block 9 is matched with the cavity 12, the through hole 13 is aligned with the pin hole 10, and the fixing pin 6 is used for fixing connection, so as to facilitate replacement and maintenance of the valve needle 7. Thereby through dividing into valve needle bar and needle head two parts with the needle, the needle head adopts the lower alloy steel material of coefficient of heat conduction to plate the needle head and separate the wear-resisting coating processing of heat, reach wear-resisting, thermal-insulated effect, and then solved the easy wearing and tearing of needle head, product deckle edge, gluey mouthful scald, the problem of hot impression that the high temperature leads to.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "disposed," "connected," "secured," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; the terms may be directly connected or indirectly connected through an intermediate, and may be communication between two elements or interaction relationship between two elements, unless otherwise specifically limited, and the specific meaning of the terms in the present invention will be understood by those skilled in the art according to specific situations.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The spliced wear-resistant heat-insulation valve needle hot nozzle system is characterized by comprising a hot nozzle main body (1), a heating sleeve (2), a hot nozzle core (3) and a valve needle assembly (4), wherein the heating sleeve (2) is arranged on the outer side of the circumference of the hot nozzle main body (1), the hot nozzle core (3) is arranged on the inner side of one end of the hot nozzle main body (1), the valve needle assembly (4) is arranged in the hot nozzle core (3), and one end, far away from the hot nozzle core (3), of the valve needle assembly (4) penetrates through the hot nozzle main body (1) and extends to the outside of the hot nozzle main body (1);
valve needle subassembly (4) are including setting up hot mouth main part (1) inside valve rod (5), the one end of valve rod (5) is connected with valve syringe needle (7) through fixed pin (6), the surface of valve syringe needle (7) sets up thermal-insulated wearing layer (8).
2. The spliced wear-resistant heat-insulating valve needle hot nozzle system as claimed in claim 1, wherein an insertion block (9) is arranged at one end of the valve rod (5) close to the valve needle head (7), and a pin hole (10) is formed in the insertion block (9).
3. The spliced wear-resistant heat-insulation valve needle hot nozzle system as claimed in claim 2, wherein a plurality of grooves (11) are uniformly formed on the outer side of the circumference of the valve needle (7), a cavity (12) is formed in one end face, facing the valve rod (5), of the valve needle (7), and through holes (13) are symmetrically formed in the side wall of the cavity (12).
4. The spliced wear-resistant heat-insulation valve needle hot nozzle system as claimed in claim 1, wherein a first spline (101) is arranged on the outer side of the circumference of one end of the hot nozzle main body (1), a hanging table (102) is arranged on one side of the first spline (101) and on the outer circle of the hot nozzle main body (1), a first boss (103) is arranged on one end, away from the first spline (101), of the hot nozzle main body (1), and a stepped hole (104) is formed in the hot nozzle main body (1) along the axis.
5. The spliced wear-resistant heat-insulating valve needle hot nozzle system as claimed in claim 4, wherein the stepped hole (104) comprises a constant diameter section (105), a notch (106) is formed in one end of the constant diameter section (105), a reducing section (107) is arranged at one end of the constant diameter section (105) far away from the notch (106), and a spline II (108) is arranged on a side wall of the reducing section (107).
6. The spliced wear-resistant heat-insulation valve needle hot nozzle system as claimed in claim 1, wherein a third spline (301) is arranged on the outer circle of the hot nozzle core (3), a second boss (302) is arranged on one side of the third spline (301), one side of the second boss (302) departing from the third spline (301) and the outer circle of the hot nozzle core (3) are in round angle transition, and a tapered hole (303) is formed in the hot nozzle core (3) along the axis.
7. The split-type wear-resistant heat-insulating valve needle hot nozzle system as claimed in claim 6, wherein the diameter of the tapered hole (303) is gradually reduced from the left end to the right end of the hot nozzle core (3).
8. The spliced wear-resistant heat-insulating valve needle hot nozzle system as claimed in claim 1, wherein the thickness of the heat-insulating wear-resistant layer (8) is 0.005 mm-0.03 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010871309.3A CN112045953A (en) | 2020-08-26 | 2020-08-26 | Spliced wear-resistant heat-insulation valve needle hot nozzle system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010871309.3A CN112045953A (en) | 2020-08-26 | 2020-08-26 | Spliced wear-resistant heat-insulation valve needle hot nozzle system |
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| CN112045953A true CN112045953A (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010871309.3A Pending CN112045953A (en) | 2020-08-26 | 2020-08-26 | Spliced wear-resistant heat-insulation valve needle hot nozzle system |
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| CN (1) | CN112045953A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113021091A (en) * | 2021-02-23 | 2021-06-25 | 苏州好特斯模具有限公司 | High-precision conical surface grinding assembly |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207373613U (en) * | 2017-10-10 | 2018-05-18 | 苏州好特斯模具有限公司 | Single injector oil pressure needle-valve Hot Runner System |
| CN108556275A (en) * | 2018-05-31 | 2018-09-21 | 嘉兴懿铄精密模具有限公司 | A kind of three core self-lubricating needles |
-
2020
- 2020-08-26 CN CN202010871309.3A patent/CN112045953A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207373613U (en) * | 2017-10-10 | 2018-05-18 | 苏州好特斯模具有限公司 | Single injector oil pressure needle-valve Hot Runner System |
| CN108556275A (en) * | 2018-05-31 | 2018-09-21 | 嘉兴懿铄精密模具有限公司 | A kind of three core self-lubricating needles |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113021091A (en) * | 2021-02-23 | 2021-06-25 | 苏州好特斯模具有限公司 | High-precision conical surface grinding assembly |
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Application publication date: 20201208 |