CN112677417B - PEEK (polyether-ether-ketone) rubber-coated shaft injection mold and injection molding method thereof - Google Patents
PEEK (polyether-ether-ketone) rubber-coated shaft injection mold and injection molding method thereof Download PDFInfo
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- CN112677417B CN112677417B CN202011599304.6A CN202011599304A CN112677417B CN 112677417 B CN112677417 B CN 112677417B CN 202011599304 A CN202011599304 A CN 202011599304A CN 112677417 B CN112677417 B CN 112677417B
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 126
- 239000004696 Poly ether ether ketone Substances 0.000 title claims abstract description 59
- 229920002530 polyetherether ketone Polymers 0.000 title claims abstract description 59
- 238000002347 injection Methods 0.000 title claims abstract description 42
- 239000007924 injection Substances 0.000 title claims abstract description 42
- 239000002184 metal Substances 0.000 claims abstract description 57
- 239000000463 material Substances 0.000 claims abstract description 30
- 239000011265 semifinished product Substances 0.000 claims description 21
- 239000004033 plastic Substances 0.000 claims description 15
- 229920003023 plastic Polymers 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000003292 glue Substances 0.000 claims description 7
- 238000010073 coating (rubber) Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- JUPQTSLXMOCDHR-UHFFFAOYSA-N benzene-1,4-diol;bis(4-fluorophenyl)methanone Chemical compound OC1=CC=C(O)C=C1.C1=CC(F)=CC=C1C(=O)C1=CC=C(F)C=C1 JUPQTSLXMOCDHR-UHFFFAOYSA-N 0.000 claims 8
- 238000000034 method Methods 0.000 claims 1
- 230000004927 fusion Effects 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000465 moulding Methods 0.000 description 4
- 230000002378 acidificating effect Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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Abstract
The invention provides a PEEK (polyether-ether-ketone) rubber-coated shaft injection mold and an injection molding method thereof, wherein a rubber-coated shaft adopts a metal insert, the metal insert comprises a large-diameter section and a small-diameter section, a cavity comprises a primary injection molding cavity and a secondary injection molding cavity, a first injection molding channel is arranged at the end part of the primary injection molding cavity, a fixing part matched with the large-diameter section of the metal insert is arranged at the middle section of the primary injection molding cavity, the inner diameter of the fixing part is the same as the outer diameter of the large-diameter section, small-diameter injection molding parts used for injection molding of the small-diameter section of the metal insert are arranged on two sides of the fixing part, one sides of the two small-diameter injection molding parts, which are close to the fixing part, are respectively provided with a tooth-shaped groove, a large-diameter injection molding part used for injection molding of the large-diameter section and the tooth-shaped part of the metal insert is arranged in the secondary injection molding cavity, and the large-diameter injection molding part is connected with a second injection molding channel. According to the invention, the tooth-shaped section is processed at the fusion position during primary injection molding, and when high-temperature PEEK material is rushed into the large-diameter injection molding part during secondary injection molding, the triangular tip is easy to melt and can be fused with the PEEK material during secondary injection molding, so that the structural strength of the secondary fusion can meet the use requirement.
Description
Technical Field
The invention relates to the technical field of injection molds, in particular to a PEEK (polyether-ether-ketone) rubber-coated shaft injection mold and an injection molding method thereof.
Background
A PEEK rubber-coated shaft applied to a magnetic pump in the acidic wastewater treatment and chemical and pharmaceutical industry is developed. The PEEK rubber-coated shaft belongs to a typical secondary rubber-coated product, and a metal insert is arranged inside the PEEK rubber-coated shaft and mainly used for increasing the overall strength and reducing PEEK raw materials; the external surface and the inner hole are completely wrapped by PEEK. The liquid that the product contacted when using is the acid liquid, so the metal insert must wrap up in the PEEK material, prevents to be corroded.
The main difficulty is the strength problem of the secondary fusion of the PEEK material, how to design the structure of the secondary fusion injection mold, and the formulation of the injection molding process scheme, so that the fusion position of the PEEK can be well fused during the secondary encapsulation, and acidic liquid is prevented from entering the interior to corrode a metal part, which is a problem that needs to be solved urgently by technicians in the field.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defect that the structural strength of the secondary fusion of the PEEK material cannot meet the use requirement in the prior art, the invention provides a PEEK rubber-coated shaft injection mold and an injection molding method thereof.
The technical scheme adopted by the invention for solving the technical problem is as follows: a PEEK rubber coating shaft injection mould adopts a metal insert, the metal insert comprises a large-diameter section and small-diameter sections arranged at two ends of the large-diameter section, a through hole is formed in the metal insert in the axial direction, the injection mould comprises a cavity formed by matching an upper mould and a lower mould, the cavity comprises a primary injection cavity and a secondary injection cavity which are separately arranged, the end part of the primary injection cavity is connected with a first injection channel, a round rod penetrating through the through hole of the metal insert is arranged in the primary injection cavity in the axial direction, the diameter of the round rod is smaller than that of the through hole of the metal insert, a fixing part matched with the large-diameter section of the metal insert is arranged at the middle section of the primary injection cavity, the inner diameter of the fixing part is the same as the outer diameter of the large-diameter section, small-diameter injection parts used for injection molding of the small-diameter section of the metal insert are arranged at two sides of the fixing part, and one side, close to the fixing part, of the small-diameter injection parts, is provided with a tooth-shaped groove, the secondary injection molding cavity is internally provided with a large-diameter injection molding part for injection molding of the large-diameter section and the tooth-shaped part of the metal insert, and the large-diameter injection molding part is connected with a second injection molding channel.
The metal insert can enhance the overall strength of the PEEK rubber-coated shaft and reduce PEEK raw materials, and the PEEK is completely coated on the outer surface and the inner hole; the PEEK is used as a raw material for encapsulation, is a material capable of enduring extremely strong chemical corrosion, has the advantages of strong acid resistance, strong alkali resistance, high temperature resistance, wear resistance, self-lubrication and the like, has light weight and low noise compared with metal materials, can prevent acidic liquid (except concentrated sulfuric acid) from being corroded, and is suitable for conveying most of chemical liquid medicines; because the inside is the metal insert, need support fixedly, so divide into twice and mould plastics, the first minor diameter section of moulding plastics hole and outer both ends, the second major diameter section of moulding plastics, because product structure restriction, the structure of fusing has two sections at least.
A round rod is arranged in the one-time injection molding cavity and used for preventing the through hole of the metal insert from being blocked during injection molding; the fixing part is matched with the large-diameter section of the metal insert and used for fixing the position of the metal insert during primary injection molding, so that the fixing part plays a role in supporting and fixing, and simultaneously prevents PEEK (polyether-ether-ketone) materials from being punched on the large-diameter section to influence subsequent secondary injection molding; the tooth-shaped groove is used for forming a tooth-shaped section at the fusion position, a tooth-shaped structure is made, and mainly when the secondary injection molding is carried out, and a high-temperature PEEK material is rushed into the large-diameter injection molding part, the tooth-shaped tip is easy to melt, and the PEEK material which can be well fused with the secondary injection molding can be well fused.
Further, in order to ensure the fusing effect of the fusing position, the tooth-shaped groove is a continuous annular triangular groove, the angle is 30-45 degrees, and the height is 1.5-2 mm.
Furthermore, the first channel of moulding plastics and the second mould plastics on the same glue inlet that the passageway top was connected, it moulds plastics to be equipped with in the passageway to open and close the second and mould plastics the commentaries on classics of moulding plastics the mouth of gluing of passageway to mould plastics. The second injection molding channel is opened through rotating the rubber opening, so that a semi-finished product and a second mold can be injected at one time, and the production efficiency is improved.
The invention also provides an injection molding method of the PEEK plastic-coated shaft injection mold, which comprises the following steps:
a) before the metal insert is placed, the metal insert is placed in an oven and heated to 180-220 ℃, then the metal insert is placed in a primary injection molding cavity, a large-diameter section is matched with a fixing part, a round rod penetrates through a through hole of the metal insert and is erected at two ends of the primary injection molding cavity, an upper die and a lower die are closed for injection molding, during injection molding, one part of PEEK material directly punches into a left small-diameter injection molding part from a first injection molding channel, the other part of PEEK material penetrates through a gap between the round rod and the through hole of the metal insert and enters into a right small-diameter injection molding part, finally, one-time injection molding of the through hole of the metal insert and small-diameter sections at two ends is completed, and a tooth-shaped section is formed at one side close to the large-diameter section through a tooth-shaped groove on the small-diameter injection molding part;
b) after the one-time injection molding is finished, cutting off the glue port material on the first injection molding channel, taking out the semi-finished product and putting the semi-finished product into an oven, wherein the temperature of the oven is required to be 180-220 ℃;
c) before the second injection molding, heating the semi-finished product by using a heating tool, heating to 400-420 ℃, opening the upper die and the lower die, ejecting out, taking out the semi-finished product from the heating tool, directly placing the semi-finished product into a secondary injection molding cavity, suspending the large-diameter section and the tooth-shaped section of the semi-finished product in the large-diameter injection molding part, attaching the rest encapsulated parts to the secondary injection molding cavity, fixing the position of the semi-finished product, closing the die, and punching the PEEK material at 380 ℃ into the large-diameter injection molding part through a second injection molding channel, wherein the tip of the tooth-shaped section is very easy to melt, so that the PEEK material can be well fused with the PEEK material subjected to the secondary injection molding.
The invention has the beneficial effects that: according to the injection mold and the injection molding method for the PEEK rubber-coated shaft, provided by the invention, the tooth-shaped section is processed at the fusion position during primary injection, and when a high-temperature PEEK material is punched into the large-diameter injection molding part during secondary injection, the triangular tip is easy to melt, so that the PEEK material can be well fused with the PEEK material subjected to secondary injection, the structural strength of secondary fusion meets the use requirement, the sealing performance of a PEEK rubber-coated layer is ensured, and the internal metal insert cannot be corroded.
Drawings
The invention is further illustrated by the following figures and examples.
FIG. 1 is a schematic structural diagram of a preferred embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the primary and secondary injection cavities;
FIG. 3 is a schematic view of a metal insert;
FIG. 4 is a schematic structural diagram of a PEEK coated shaft semi-finished product;
fig. 5 is a schematic structural diagram of a PEEK-coated shaft finished product.
In the figure: 1. the PEEK plastic-coated shaft comprises, by weight, 1-1 parts of a PEEK plastic-coated shaft body, 1-2 parts of a large-diameter section, a small-diameter section, 1-3 parts of a through hole, 1-4 parts of a tooth-shaped section, 2 parts of a lower die, 3 parts of a primary injection molding cavity, 3-1 parts of a fixing portion, 3-2 parts of a small-diameter injection molding portion, 3-3 parts of a tooth-shaped groove, 4 parts of a secondary injection molding cavity, 4-1 parts of a large-diameter injection molding portion, 5 parts of a first injection molding channel, 6 parts of a second injection molding channel, 7 parts of a rotary plastic port.
Detailed Description
The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, and only illustrates the basic structure of the present invention in a schematic manner, and therefore it only shows the constitution related to the present invention.
As shown in figures 1-5, the injection mold for the PEEK encapsulated shaft comprises a metal insert, wherein the metal insert comprises a large-diameter section 1-1 and small-diameter sections 1-2 arranged at two ends of the large-diameter section 1-1, the metal insert is provided with a through hole 1-3 along the axial direction, the injection mold comprises a cavity formed by matching an upper mold and a lower mold 2, the cavity comprises a primary injection cavity 3 and a secondary injection cavity 4 which are separately arranged, the end part of the primary injection cavity 3 is connected with a first injection channel 5, a round rod penetrating through the through hole 1-3 of the metal insert is arranged in the primary injection cavity 3 along the axial direction, the diameter of the round rod is smaller than that of the through hole 1-3 of the metal insert, the middle section of the primary injection cavity 3 is provided with a fixing part 3-1 matched with the large-diameter section 1-1 of the metal insert, and the inner diameter of the fixing part 3-1 is the same as the outer diameter of the large-diameter section 1-1, the two sides of the fixing portion 3-1 are provided with small-diameter injection molding portions 3-2 used for injection molding of the small-diameter section 1-2 of the metal insert, one sides, close to the fixing portion 3-1, of the two small-diameter injection molding portions 3-2 are provided with tooth-shaped grooves 3-3, a large-diameter injection molding portion 4-1 used for injection molding of the large-diameter section 1-1 of the metal insert and a tooth-shaped portion is arranged in the secondary injection molding cavity 4, and the large-diameter injection molding portion 4-1 is connected with a second injection molding channel 6.
The tooth-shaped groove 3-3 is a continuous annular triangular groove, the angle is 30-45 degrees, and the height is 1.5-2 mm.
The first injection molding channel 5 and the second injection molding channel 6 are connected at the beginning end of the same glue inlet, and a glue rotating port 7 capable of opening and closing the second injection molding channel 6 is arranged in the second injection molding channel 6.
The injection molding method of the PEEK plastic-coated shaft injection mold comprises the following steps:
a) before the metal insert is placed, the metal insert needs to be placed in an oven and heated to 220 ℃ of 180 ℃, then the metal insert is placed in the one-time injection molding cavity 3, the large-diameter section 1-1 is matched with the fixed part 3-1, the round rod passes through the through hole 1-3 of the metal insert and is erected at two ends of the one-time injection molding cavity 3, then the upper die and the lower die 2 are closed for injection molding, when in injection molding, one part of PEEK material directly rushes into the left small-diameter injection molding part 3-2 from the first injection molding channel 5, the other part of PEEK material passes through the gap between the round rod and the metal insert through hole 1-3 and enters into the right small-diameter injection molding part 3-2, and finally one-time injection molding of the metal insert through hole 1-3 and the small-diameter sections 1-2 at two ends is completed, a tooth-shaped section 1-4 is formed at one side close to the large-diameter section 1-1 through a tooth-shaped groove 3-3 on the small-diameter injection molding part 3-2;
b) after the one-time injection molding is finished, cutting off the glue port material on the first injection molding channel 5, taking out the semi-finished product and putting the semi-finished product into an oven, wherein the temperature of the oven is required to be 180-220 ℃;
c) before the second injection molding, a heating tool is used for heating the semi-finished product, the temperature is raised to 400-420 ℃, the upper die and the lower die 2 are opened and ejected, the semi-finished product is taken out from the heating tool and is directly placed into the secondary injection molding cavity 4, the large-diameter section 1-1 and the toothed section 1-4 of the semi-finished product are suspended in the large-diameter injection molding part 4-1, the other encapsulated parts are attached to the secondary injection molding cavity 4, the position of the semi-finished product is fixed, then the die is closed, when PEEK material at 380 ℃ is flushed into the large-diameter injection molding part 4-1 through the second injection molding channel 6, the tip of the toothed section 1-4 is easily melted, the PEEK material can be well fused with the PEEK material of the secondary injection molding, the die is opened, and the finished product of the PEEK rubber-coated shaft 1 is taken out.
Directions and references (e.g., up, down, left, right, etc.) may be used in the present disclosure only to aid in the description of features in the figures. The following detailed description is, therefore, not to be taken in a limiting sense, and the scope of the claimed subject matter is defined only by the appended claims and equivalents thereof.
In light of the foregoing description of preferred embodiments in accordance with the invention, it is to be understood that numerous changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. The utility model provides a PEEK rubber coating axle injection mould, rubber coating axle adopt metal insert, metal insert includes big footpath section (1-1) and locates path segment (1-2) at big footpath section (1-1) both ends, metal insert is equipped with through-hole (1-3) along the axial, its characterized in that: the injection mould comprises a cavity formed by matching an upper mould and a lower mould (2), the cavity comprises a primary injection mould cavity (3) and a secondary injection mould cavity (4) which are separately arranged, the end part of the primary injection mould cavity (3) is connected with a first injection channel (5), a round rod which penetrates through a metal insert through hole (1-3) is arranged in the primary injection mould cavity (3) along the axial direction, the diameter of the round rod is smaller than that of the metal insert through hole (1-3), a fixing part (3-1) which is matched with a large-diameter section (1-1) of the metal insert is arranged at the middle section of the primary injection mould cavity (3), the inner diameter of the fixing part (3-1) is the same as the outer diameter of the large-diameter section (1-1), and small-diameter injection moulding parts (3-2) which are used for injection moulding the small-diameter section (1-2) of the metal insert are arranged at two sides of the fixing part (3-1), one sides of the two small-diameter injection molding parts (3-2) close to the fixing part (3-1) are respectively provided with a section of tooth-shaped groove (3-3), a large-diameter injection molding part (4-1) for injection molding of a large-diameter section (1-1) and a tooth-shaped part of the metal insert is arranged in the secondary injection molding cavity (4), and the large-diameter injection molding part (4-1) is connected with a second injection molding channel (6);
the first injection molding channel (5) and the second injection molding channel (6) are connected on the same glue inlet, and a glue rotating port (7) capable of opening and closing the second injection molding channel (6) is arranged in the second injection molding channel (6).
2. The PEEK over-mold injection mold of claim 1, wherein: the tooth-shaped groove (3-3) is a continuous annular triangular groove, the angle is 30-45 degrees, and the height is 1.5-2 mm.
3. The injection molding method of a PEEK-coated plastic shaft injection mold according to any one of claims 1 to 2, wherein: the method comprises the following steps:
a) before the metal insert is placed, the metal insert is placed in an oven and heated to 180-fold temperature 220 ℃, then the metal insert is placed in a primary injection molding cavity (3), a large-diameter section (1-1) is matched with a fixing part (3-1), a round rod penetrates through a metal insert through hole (1-3) and is overlapped at two ends of the primary injection molding cavity (3), then an upper mold and a lower mold (2) are closed for injection molding, during injection molding, one part of PEEK material is directly flushed into a left small-diameter injection molding part (3-2) from a first injection molding channel (5), the other part of PEEK material penetrates through a gap between the round rod and the metal insert through hole (1-3) and enters a right small-diameter injection molding part (3-2), and finally, one-time injection molding of the metal insert through hole (1-3) and the small-diameter sections (1-2) at two ends is completed, and one tooth-shaped groove (3-3) on the small-diameter injection molding part (3-2) is close to the large-diameter section (1-1) The side forms a tooth-shaped section (1-4);
b) after the one-time injection molding is finished, cutting off the gate materials on the first injection molding channel (5), taking out the semi-finished product and putting the semi-finished product into an oven, wherein the temperature of the oven is required to be 180-;
c) before the second injection molding, a heating tool is used for heating the semi-finished product, the temperature is raised to 400-420 ℃, the upper die and the lower die (2) are opened and ejected, the semi-finished product is taken out from the heating tool and is directly placed into the secondary injection molding cavity (4), the upper large-diameter section (1-1) and the tooth-shaped section (1-4) of the semi-finished product are suspended in the large-diameter injection molding part (4-1), the other encapsulated parts are attached to the secondary injection molding cavity (4), the position of the semi-finished product is fixed, then the die is closed, and when the PEEK material at 380 ℃ is punched into the large-diameter injection molding part (4-1) through the second injection molding channel (6), the tip of the tooth-shaped section (1-4) is very easy to melt, and the PEEK material can be well fused with the PEEK material of the secondary injection molding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011599304.6A CN112677417B (en) | 2020-12-29 | 2020-12-29 | PEEK (polyether-ether-ketone) rubber-coated shaft injection mold and injection molding method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011599304.6A CN112677417B (en) | 2020-12-29 | 2020-12-29 | PEEK (polyether-ether-ketone) rubber-coated shaft injection mold and injection molding method thereof |
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| Publication Number | Publication Date |
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| CN112677417A CN112677417A (en) | 2021-04-20 |
| CN112677417B true CN112677417B (en) | 2022-07-26 |
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| CN103203831A (en) * | 2013-02-27 | 2013-07-17 | 德尔福派克电气***有限公司 | Novel insert injection molding process |
| CN109702964A (en) * | 2019-03-08 | 2019-05-03 | 青岛海泰科模具有限公司 | Automobile luggage racks bicolor injection mould |
| CN111577863A (en) * | 2020-05-21 | 2020-08-25 | 上海芮朔精密模塑科技有限公司 | Rubber-coated injection-molded gear, injection molding process and mold |
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2020
- 2020-12-29 CN CN202011599304.6A patent/CN112677417B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1751865A (en) * | 2004-09-24 | 2006-03-29 | 埃姆斯化学股份公司 | Injection molding method for manufacturing plastic parts |
| CN101444962A (en) * | 2007-11-27 | 2009-06-03 | 林宜修 | Method for operating injection insert molding and auxiliary device thereof |
| CN101450519A (en) * | 2007-12-07 | 2009-06-10 | 合兴集团有限公司 | Production method of metal insert plastic product in vehicle sensor |
| CN102689401A (en) * | 2012-06-28 | 2012-09-26 | 金发科技股份有限公司 | Forming process for combining PA612 and metal insert |
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Address after: 213100 no.7-16, Yangtze River Delta mold City, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee after: Jiangsu Junhua Special Polymer Materials Co.,Ltd. Address before: 213100 no.7-16, Yangtze River Delta mold City, Wujin high tech Industrial Development Zone, Changzhou City, Jiangsu Province Patentee before: JIANGSU JUNHUA HIGH PERFORMANCE SPECIALTY ENGINEERING PLASTICS (PEEK) PRODUCTS CO.,LTD. |
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