CN116673806A - Wear-resistant and life-prolonging process for PET (polyethylene terephthalate) Hafu block outer cone - Google Patents
Wear-resistant and life-prolonging process for PET (polyethylene terephthalate) Hafu block outer cone Download PDFInfo
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- CN116673806A CN116673806A CN202310606144.0A CN202310606144A CN116673806A CN 116673806 A CN116673806 A CN 116673806A CN 202310606144 A CN202310606144 A CN 202310606144A CN 116673806 A CN116673806 A CN 116673806A
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- China
- Prior art keywords
- outer cone
- block
- grinding
- shot blasting
- pet
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Links
- 238000000034 method Methods 0.000 title claims abstract description 23
- 229920000139 polyethylene terephthalate Polymers 0.000 title claims abstract description 20
- 239000005020 polyethylene terephthalate Substances 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 title claims abstract description 20
- -1 polyethylene terephthalate Polymers 0.000 title claims abstract description 8
- 238000005422 blasting Methods 0.000 claims abstract description 28
- 230000003746 surface roughness Effects 0.000 claims abstract description 28
- 239000011248 coating agent Substances 0.000 claims abstract description 27
- 238000000576 coating method Methods 0.000 claims abstract description 27
- 239000008188 pellet Substances 0.000 claims description 13
- 230000001050 lubricating effect Effects 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000004519 grease Substances 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 230000004913 activation Effects 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract description 6
- 239000000314 lubricant Substances 0.000 abstract description 5
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 238000003672 processing method Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 229910003460 diamond Inorganic materials 0.000 abstract 1
- 239000010432 diamond Substances 0.000 abstract 1
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 229920004449 Halon® Polymers 0.000 description 4
- PXBRQCKWGAHEHS-UHFFFAOYSA-N dichlorodifluoromethane Chemical compound FC(F)(Cl)Cl PXBRQCKWGAHEHS-UHFFFAOYSA-N 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 210000001161 mammalian embryo Anatomy 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B5/00—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor
- B24B5/02—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work
- B24B5/14—Machines or devices designed for grinding surfaces of revolution on work, including those which also grind adjacent plane surfaces; Accessories therefor involving centres or chucks for holding work for grinding conical surfaces, e.g. of centres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/08—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain an anti-friction or anti-adhesive surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C11/00—Selection of abrasive materials or additives for abrasive blasts
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
-
- 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
- B29C45/2602—Mould construction elements
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The application discloses a wear-resistant and life-prolonging process for a PET (polyethylene terephthalate) Hafu block outer cone, which comprises the following steps of grinding, surface shot blasting treatment and DLC (diamond like carbon) coating treatment. The grinding processing method ensures that the outer cone has stable outer assistance dimension and excellent coaxiality and avoids the phenomenon of out-of-round; the surface roughness of the outer cone after grinding is reduced through surface shot blasting, the surface roughness of the outer cone after grinding is unified, the lubricant is easier to absorb and store by the outer cone of the Harvard block, the fatigue resistance of the surface of the outer cone is improved through pre-pressing, the surface of the outer cone is activated, and the binding force of the DLC coating is increased to perform pretreatment for the subsequent DLC coating treatment; the DLC coating is used for processing and fixing the uniform roughness surface state of the outer cone after shot blasting; the service life of the outer cone of the Hafu block can be greatly prolonged by processing the outer cone through the Hafu block process.
Description
Technical Field
The application relates to the technical field of bottle embryo molds, in particular to a wear-resistant and life-prolonging process for an outer cone of a PET (polyethylene terephthalate) haffer block.
Background
The structure of the injection mold is special, the degree of the mold opening and closing action accuracy of the mold plays a very important role in the parting process of most product molds, whether flash is generated after the product is molded is directly influenced, and the injection mold has important significance on the quality and appearance of the whole product.
An injection mold, such as the one disclosed in CN212312628U, comprises a core, a core sleeve, a haffer block, a positioning seat, a forming mold, a gate insert and a mold plate.
Wherein the haffling block has the following functions: 1. forming a tube/bottle embryo screw thread; 2. connecting the cavity and the core sleeve; is one of the indispensable components in the injection mold. The haverse block, the cavity and the core sleeve are in interference fit and commonly called as a pressing position, so that the outer cone of the haverse block is required to have the characteristics of compression, wear resistance and damage prevention. However, in the actual use process of the injection mold, the poor wear resistance of the halon blocks is often the main cause of failure of the halon blocks, and the outer cone of the halon blocks is damaged, pulled and deformed to fail after long-term use, so that the whole service life of the halon blocks is low, and the mold overhaul and maintenance cost is increased.
Disclosure of Invention
The application aims to overcome the defects of the prior art, and provides a wear-resistant and life-prolonging process for the outer cone of a PET (polyethylene terephthalate) Hafu block, which ensures the stable outer-assistance dimension and excellent coaxiality of the outer cone through grinding processing and avoids the phenomenon of out-of-round; the surface roughness of the outer cone after grinding is reduced through surface shot blasting, the surface roughness of the outer cone after grinding is unified, the lubricant is easier to absorb and store by the outer cone of the Harvard block, the fatigue resistance of the surface of the outer cone is improved through pre-pressing, the surface of the outer cone is activated, and the binding force of the DLC coating is increased to perform pretreatment for the subsequent DLC coating treatment; the DLC coating is used for processing and fixing the uniform roughness surface state of the outer cone after shot blasting; the service life of the outer cone of the Hafu block can be greatly prolonged by processing the outer cone through the Hafu block process.
The aim of the application is realized by the following technical scheme:
a PET (polyethylene terephthalate) haffling block outer cone wear-resistant life-prolonging process comprises the following steps:
s1, grinding: the outer cone of the Hafu block is processed through grinding processing, and a first processing reference surface with stable outer circle size is obtained;
s2, surface shot blasting: performing surface shot blasting on the first processing reference surface to obtain a second processing reference surface with surface activation, reduced surface roughness and uniform surface roughness;
s3, DLC coating treatment: and setting a DLC coating on the second processing reference surface to obtain the outer cone with fixed surface roughness after shot blasting.
Further, in the step S1, the surface roughness of the outer cone after grinding is ra0.3-ra0.8.
Further, in the step S2, the roughness of the outer cone after the surface shot blasting is ra0.15-ra0.2.
Further, in the step S2, shot-blasted pellets are ceramic pellets, steel pellets or cast iron pellets.
Further, the outer cone with fixed surface roughness is uniformly provided with lubricating grease.
The beneficial effects of the application are as follows:
the grinding processing method ensures that the outer cone has stable outer assistance dimension and excellent coaxiality and avoids the phenomenon of out-of-round; the surface roughness of the outer cone after grinding is reduced through surface shot blasting, the surface roughness of the outer cone after grinding is unified, the lubricant is easier to absorb and store by the outer cone of the Harvard block, the fatigue resistance of the surface of the outer cone is improved through pre-pressing, the surface of the outer cone is activated, and the binding force of the DLC coating is increased to perform pretreatment for the subsequent DLC coating treatment; the DLC coating is used for processing and fixing the uniform roughness surface state of the outer cone after shot blasting; the wear resistance of the Hafu block can be greatly improved and the service life of the Hafu block outer cone can be prolonged by processing the outer cone through the Hafu block process.
Detailed Description
The technical solutions of the present application will be clearly and completely described below with reference to the embodiments, and it is apparent that the described embodiments are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are intended to be within the scope of the present application, based on the embodiments of the present application.
The application provides a technical scheme that:
a PET (polyethylene terephthalate) haffling block outer cone wear-resistant life-prolonging process comprises the following steps:
s1, grinding: the outer cone of the Hafu block is processed through grinding processing, and a first processing reference surface with stable outer circle size is obtained;
the outer cone is machined for the first time through grinding, the obtained outer circle of the first machining reference surface is stable in size and excellent in coaxiality, and the out-of-round state of turning cannot be generated.
S2, surface shot blasting: performing surface shot blasting on the first processing reference surface to obtain a second processing reference surface with surface activation, reduced surface roughness and uniform surface roughness;
by surface peening on the basis of a first machined reference surface: 1. the problem of non-uniform surface roughness in grinding processing in the step S1 can be solved, a second processing reference surface with uniform surface roughness is obtained, and the lubricating effect of the Harvard blocks in later use is ensured. 2. After the surface shot blasting, the outer cone of the Hafu block is easier to absorb and store lubricant, and the friction coefficient is reduced and the surface effect of the part is lubricated when the mold is opened and closed rapidly. 3. The surface roughness of the first processing reference surface can be reduced through surface shot blasting, the surface roughness of the outer cone after grinding is Ra0.3-Ra0.8, and the surface roughness of the outer cone after surface shot blasting is Ra0.15-Ra0.2. 4. The surface of the outer cone can be activated through surface shot blasting, so that the binding force of the DLC coating is increased during the subsequent DLC coating treatment, and the service life of the thickness of the DLC coating is prolonged. 5. And (3) generating surface pre-pressing on the outer cone through surface shot blasting to obtain a second processing reference surface with improved surface fatigue resistance.
S3, DLC coating treatment: and setting a DLC coating on the second processing reference surface to obtain the outer cone with fixed surface roughness after shot blasting. The particular method of disposing the DLC coating is prior art and may be, for example, but not limited to, shaping by CVD techniques.
Through setting up DLC coating, the even roughness surface condition of outer cone after fixed peening, extension huff piece outer cone's life.
The huff blocks processed by different processes have the following outgoing use effects:
(1) Life of untreated shot and coating treatment: black spots exist around 20 ten thousand times.
(2) The Harf block is not subjected to shot blasting treatment and is directly subjected to DLC treatment: the service life is 60-80 ten thousand times, slight strain scratch is generated, and the coating begins to peel off.
(3) Ha Fukuai after shot blasting and DLC treatment: the service life is about 150 ten thousand die times, slight drawing is started, and the coating starts to fall off.
When the haffling block is put on the machine, the conical surfaces are coated with the same kind of lubricating grease. From the above, the outer cone is processed by the process of the application, the service life of the half block is improved by 7.5 times compared with the half block which is only processed by grinding, and the service life of the half block which is only processed by grinding and DLC is improved by 1.875 times to 2.5 times.
In the step S1, the surface roughness of the outer cone after grinding is Ra0.3-Ra0.8. Specifically, but not limited to, ra0.3, ra0.4, ra0.5, ra0.6, ra0.7, ra0.8.
In the step S2, the roughness of the outer cone surface after the surface shot blasting is Ra0.15-Ra0.2. Specifically, but not limited to, ra0.15, ra0.16, ra0.17, ra0.18, ra0.19, ra0.2.
In the step S2, shot-blasted pellets are ceramic pellets, steel pellets or cast iron pellets. Among them, ceramic pellets are preferable.
When the Harf block is on machine, lubricating grease is uniformly arranged on the outer cone with fixed surface roughness.
The grinding processing method ensures that the outer cone has stable outer assistance dimension and excellent coaxiality and avoids the phenomenon of out-of-round; the surface roughness of the outer cone after grinding is reduced through surface shot blasting, the surface roughness of the outer cone after grinding is unified, the lubricant is easier to absorb and store by the outer cone of the Harvard block, the fatigue resistance of the surface of the outer cone is improved through pre-pressing, the surface of the outer cone is activated, and the binding force of the DLC coating is increased to perform pretreatment for the subsequent DLC coating treatment; the DLC coating is used for processing and fixing the uniform roughness surface state of the outer cone after shot blasting; the wear resistance of the outer cone of the Harf block can be greatly improved and the service life of the outer cone of the Harf block can be prolonged by the Harf block process.
The foregoing is merely a preferred embodiment of the application, and it is to be understood that the application is not limited to the form disclosed herein but is not to be construed as excluding other embodiments, but is capable of numerous other combinations, modifications and environments and is capable of modifications within the scope of the inventive concept, either as taught or as a matter of routine skill or knowledge in the relevant art. And that modifications and variations which do not depart from the spirit and scope of the application are intended to be within the scope of the appended claims.
Claims (5)
1. A PET (polyethylene terephthalate) haffer block outer cone wear-resisting and life-prolonging process is characterized in that: the method comprises the following steps:
s1, grinding: the outer cone of the Hafu block is processed through grinding processing, and a first processing reference surface with stable outer circle size is obtained;
s2, surface shot blasting: performing surface shot blasting on the first processing reference surface to obtain a second processing reference surface with surface activation, reduced surface roughness and uniform surface roughness;
s3, DLC coating treatment: and setting a DLC coating on the second processing reference surface to obtain the outer cone with fixed surface roughness after shot blasting.
2. The PET haffling block cone wear-resistant life-prolonging process of claim 1, wherein: in the step S1, the surface roughness of the outer cone after grinding is Ra0.3-Ra0.8.
3. The PET haffling block cone wear-resistant life-prolonging process of claim 2, wherein: in the step S2, the roughness of the outer cone surface after the surface shot blasting is Ra0.15-Ra0.2.
4. The PET haffling block cone wear-resistant life-prolonging process of claim 1, wherein: in the step S2, shot-blasted pellets are ceramic pellets, steel pellets or cast iron pellets.
5. The PET haffling block cone wear-resistant life-prolonging process of claim 1, wherein: the outer cone with fixed surface roughness is uniformly provided with lubricating grease.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310606144.0A CN116673806A (en) | 2023-05-26 | 2023-05-26 | Wear-resistant and life-prolonging process for PET (polyethylene terephthalate) Hafu block outer cone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310606144.0A CN116673806A (en) | 2023-05-26 | 2023-05-26 | Wear-resistant and life-prolonging process for PET (polyethylene terephthalate) Hafu block outer cone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116673806A true CN116673806A (en) | 2023-09-01 |
Family
ID=87786485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310606144.0A Pending CN116673806A (en) | 2023-05-26 | 2023-05-26 | Wear-resistant and life-prolonging process for PET (polyethylene terephthalate) Hafu block outer cone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116673806A (en) |
-
2023
- 2023-05-26 CN CN202310606144.0A patent/CN116673806A/en active Pending
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