CN103660231A - Plastic extrusion molding method for high-efficiency extrusion of PVC external tooth-shaped gear - Google Patents
Plastic extrusion molding method for high-efficiency extrusion of PVC external tooth-shaped gear Download PDFInfo
- Publication number
- CN103660231A CN103660231A CN201310650274.0A CN201310650274A CN103660231A CN 103660231 A CN103660231 A CN 103660231A CN 201310650274 A CN201310650274 A CN 201310650274A CN 103660231 A CN103660231 A CN 103660231A
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- China
- Prior art keywords
- external tooth
- plastic
- tooth form
- extrusion molding
- gear
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2015/00—Gear wheels or similar articles with grooves or projections, e.g. control knobs
- B29L2015/003—Gears
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Gears, Cams (AREA)
Abstract
The invention relates to the field of plastic extrusion molding and provides a novel method for an external tooth-shaped plastic gear molded by an external tooth-shaped plastic pipe extrusion molding die and the external tooth-shaped plastic pipe extrusion molding die. The method comprises the following steps: (1) plasticizing; (2) molding; (3) shaping; and (4) cutting for formation of finished plastic gears with different tooth thicknesses. The external tooth-shaped plastic pipe extrusion molding die is mainly composed of a neck mold, a core rod, a sizing sleeve and other assemblies, wherein the inner surfaces of the neck mold and the sizing sleeve are tooth blanks, and the core rod is located at the middle. An external diameter sizing method is employed to allow a molded shape to be fixed in the sizing sleeve and a desired plastic product to be obtained. The method is characterized in that a long external tooth-shaped plastic pipe can be molded in one extrusion by using the external tooth-shaped plastic pipe extrusion molding die. The invention has the following advantages: plastic gears with different tooth thicknesses can be produced without repeated manufacturing of the die; a molded plastic product can partially substitute metal products in household appliances, mechanical and electrical products, food machinery and engineering machinery and has high surface quality, low roughness, high size precision and uniform wall thickness; and the external tooth-shaped plastic pipe extrusion molding die has higher processing efficiency compared with injection molding dies.
Description
Technical field
The invention belongs to a kind of plastic extrusion method of efficiently extruding PVC external tooth form gear, specifically adopt the external tooth form plastic tube of endless on plastic extrusion mould extrusion theory, then cut into external tooth form plastic gear.
Background technology
Continuous rising along with metal and alloy melting cost thereof, and the develop rapidly of nonmetal and polymeric material, adopt at present parts nonmetal and that polymeric material is manufactured more and more, wherein the PVC material in plastics family is well used in home appliance, electronic product, food machinery and engineering machinery field at parts such as pulley, gears.At present, the production of most of external tooth form plastic gear adopts traditional injection molding forming method, but it has a lot of defects, as: running channel condensation waste material is many, stock utilization is lower, and cost is higher, and working (machining) efficiency is lower.Along with the development of mechanical industry and intensifying of international competition, the reduction of the raising of the performance of gear product and processing cost is had higher requirement, especially the raising of working (machining) efficiency.Therefore the shaping new technology about plastic gear has obtained paying attention to and development.The original traditional injection molding process processing method stock utilization of this type of processing method improves greatly, and working (machining) efficiency also improves, but this type of processing method all adopts injection mo(u)lding production and processing method, and its working (machining) efficiency needs further to be promoted.For this reason, inventor has proposed a kind of plastic extrusion method of efficiently extruding PVC external tooth form gear.
A kind of this plastic extrusion method of efficiently extruding PVC external tooth form gear is to take plastic extruding forming mould as basis, continuous extrusion molding strip external tooth form plastic pipe on extruder head, then adopt the method for cutting the external tooth form plastic pipe of continuous extrusion molding to be cut into the plastic gear finished parts with different transverse tooth thickness, need not repeat because transverse tooth thickness is different mfg. moulding die.This kind of method is the technique adopting extruding continuous extrusion molding on external tooth form forming plastic pipe mould, produce the product that as far as possible approaches gear net shape, therefore this kind of processing method have that production efficiency is high, material-saving, the significant advantage such as energy-conservation, in addition, because the continuous extrusion molding external tooth form of external tooth form forming plastic pipe mould plastic pipe is extruded in employing, then adopt the plastic gear finished parts be cut into different transverse tooth thickness, than the processing method of injection forming mold, there is higher working (machining) efficiency.
In this plastic extrusion method of efficiently extruding PVC external tooth form gear, adopt the manufacture of extrusion molding mould progressive forming method to approach the strip external gear plastic pipe of gear part net shape, the manufacturing process working (machining) efficiency of more traditional injection forming mold is high, and the pipe fitting surface quality that adopts external diameter sizing method to obtain is good.In Design of Dies, adopt and extrude the continuous extrusion molding of external tooth form plastic tube shaping dies, then adopt cutting method to be processed into the plastic gear of different transverse tooth thickness, thereby improve working (machining) efficiency, need not repeat mfg. moulding die, greatly saved mold materials.The external tooth form plastic tube that above-mentioned new technology is shaped, not only can make the surface quality of the part of acquisition get a greater increase, but also have higher working (machining) efficiency.The advantages such as the part obtaining has can absorption of noise, absorbing, light weight, resist chemical, self-lubricating.There is the features such as high-strength, high-impact, high-wearing feature, good processability, economic and practical be stronger, can partly substitute the metal material parts in home appliance, electronic product, food machinery and engineering machinery.Therefore the new method that, the external tooth form plastic tube that the shaping dies of external tooth form plastic tube extrudes is extruded in this utilization has good use value and development prospect.
Summary of the invention
The object of patent of the present invention is: for the problem of above-mentioned existence, overcome the material poor efficiency of external tooth form plastic gear processing with working (machining) efficiency compared with low and because of the different mfg. moulding dies repeatedly of part transverse tooth thickness.On plastic extruder, adopt the manufacturing process of extruding continuously external tooth form plastic pipe, then adopt the gear finished parts that is cut into different transverse tooth thickness.With the manufacturing process of extruding continuously external tooth form plastic pipe, more traditional injection molding technology has improved working (machining) efficiency, has reduced the consumption of material.Extrude continuously the manufacturing process of external tooth form plastic pipe, can just can extrude very long external tooth form plastic pipe through an extrusion molding, then through digital control wire-electrode cutting, become the plastic gear finished parts of different transverse tooth thickness, more traditional injection molding method, can further improve the working (machining) efficiency of gear.Effectively solved the problem existing in prior art and the defect that need to repeat mfg. moulding die, effectively part substitutes the parts of metal material in home appliance, electronic product, food machinery and engineering machinery.
The technical scheme of patent of the present invention is: the present invention is a kind of mould that external tooth form plastic tube is shaped of extruding, and comprises four corresponding stages of plastic gear finished parts of plasticizing, moulding, sizing, the different transverse tooth thickness of cutting forming.
The plastic phase frictional heat that mainly heating and screw rod, the barrel by extruder heater produces the mixing of plastics, shear action makes solid plastics become uniform viscous state plastics; Formative stage be mainly viscous state plastics under the promotion of screw rod, with certain pressure and speed continuously by there being the former of internal tooth base mouth mould, thereby obtain the external tooth form plastic pipe with certain size and shape; The sizing stage is mainly in the calibration sleeve that has internal tooth base, to make in type shape be fixed up, and becomes needed plastic products; The cutting forming stage is mainly the external tooth form plastic pipe of continuous extrusion molding to be cut into the plastic gear finished parts of many different transverse tooth thickness.
Adopt this kind of scheme, by extruding continuously the external tooth form plastic pipe of the longer size of manufacturing process once-forming of external tooth form plastic pipe, then adopt be finally the shaped plastic gear finished parts of different transverse tooth thickness of cutting technique.This new technology can realize higher Gear Processing efficiency.
Accompanying drawing explanation
By reference to the accompanying drawings specific embodiment of the invention scheme to be described in detail below.
Fig. 1 is the simple schematic diagram of external tooth form plastic gear extrusion method mould of the present invention.
Fig. 2 is the process schematic diagram that the present invention shapes external tooth form plastic gear part.
Being labeled as in above-mentioned figure:
Fig. 1 is 1. calibration sleeves in external tooth form plastic gear extrusion method mould of the present invention, 2. mouthful mould, 3. plug, 4. current divider support, 5. current divider, 6. tooth base, 7. air inlet.
Beneficial effect of the present invention: the present invention is owing to adopting a kind of plastic extrusion method and cutting processing technique of efficiently extruding PVC external tooth form gear, can produce the gear of different transverse tooth thickness and need not repeat mfg. moulding die, thereby has saved mold materials.On mouth mould and calibration sleeve, adopted internal tooth base, and adopt external diameter sizing method to make the external tooth form plastic pipe surface quality extruded high, roughness is low, dimensional accuracy is high, evenness of wall thickness is good, the internal stress of product is little, can partly substitute the metal material parts in home appliance, electronic product, food machinery and engineering machinery.The forming technology that external tooth form plastic tube mould is extruded in employing has higher working (machining) efficiency than the injection forming process.
The specific embodiment
Fig. 1 is the simple schematic diagram of external tooth form plastic gear extrusion method mould, Fig. 2 is the process schematic diagram that the present invention shapes external tooth form plastic gear part, mouth mould and calibration sleeve inner surface are tooth base, centre is plug, make viscous state plastics under the promotion of screw rod, with certain pressure and speed, continuously by thering is the former of internal tooth base mouth mould, at mouth mould and plug shaping external tooth form plastic pipe, obtain the external tooth form plastic pipe of certain size and shape.Adopt external diameter sizing method in calibration sleeve, to make in type shape be fixed up, become needed plastic products.Finally by the processing method of cutting, cut into the plastic gear finished parts of many different transverse tooth thickness.
Equipment required for the present invention is plastic extruding forming machine.
Claims (5)
1. a plastic extrusion method of efficiently extruding PVC external tooth form gear, is characterized in that: include a mouthful mould, calibration sleeve and plug; In described mouth mould, be profile of tooth, to obtain needed shape and size; In described calibration sleeve, be that profile of tooth and employing external diameter sizing method are carried out accurately footpath admittedly to the external tooth form plastic tube being shaped; Described plug is the internal diameter for the external tooth form plastic tube that is shaped.
2. according to a kind of plastic extrusion method of efficiently extruding PVC external tooth form gear described in claim 1, it is characterized in that: the described gear of extruding the shaping of external tooth form plastic tube shaping dies, its processing step is: (one) plasticizing; (2) moulding; (3) sizing; (4) cut into the plastic gear finished parts with different transverse tooth thickness.
3. a kind of plastic extrusion method of efficiently extruding PVC external tooth form gear according to claim 1, it is characterized in that: the described external tooth form plastic tube shaping dies of extruding is compared with injecting molding die manufacturing technology, once extrude the external tooth form plastic pipe of the long size that just can be shaped, working (machining) efficiency is high, does not waste material.
4. a kind of plastic extrusion method of efficiently extruding PVC external tooth form gear according to claim 2, it is characterized in that: be to take plastic extruding forming mould as basis, continuous extrusion molding strip external tooth form plastic pipe on extruder head, then adopt the method for cutting the external tooth form plastic pipe of continuous extrusion molding to be cut into the plastic gear finished parts with different transverse tooth thickness, need not repeat because transverse tooth thickness is different mfg. moulding die.
5. a kind of plastic extrusion method of efficiently extruding PVC external tooth form gear according to claim 3, it is characterized in that: the described external tooth form plastic tube shaping dies of extruding adopts external diameter sizing method to carry out accurately sizing to external tooth form plastic pipe, tube surfaces quality is high, roughness is low, dimensional accuracy is high, evenness of wall thickness is good, and the internal stress of product is little.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310650274.0A CN103660231A (en) | 2013-12-06 | 2013-12-06 | Plastic extrusion molding method for high-efficiency extrusion of PVC external tooth-shaped gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310650274.0A CN103660231A (en) | 2013-12-06 | 2013-12-06 | Plastic extrusion molding method for high-efficiency extrusion of PVC external tooth-shaped gear |
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| Publication Number | Publication Date |
|---|---|
| CN103660231A true CN103660231A (en) | 2014-03-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310650274.0A Pending CN103660231A (en) | 2013-12-06 | 2013-12-06 | Plastic extrusion molding method for high-efficiency extrusion of PVC external tooth-shaped gear |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216270A (en) * | 2015-09-10 | 2016-01-06 | 天水华天集成电路包装材料有限公司 | A kind of integrated circuit packaging tube extrusion moulding mould and production method |
| CN109608784A (en) * | 2018-11-23 | 2019-04-12 | 余姚市宇洲电器有限公司 | A kind of preparation method of plastic gear igelite |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5859820A (en) * | 1981-10-07 | 1983-04-09 | Mitsubishi Rayon Co Ltd | Gear |
| JPS63120617A (en) * | 1986-11-10 | 1988-05-25 | Matsushita Electric Ind Co Ltd | Method for integrally molding intermeshed gears |
| SU1412984A1 (en) * | 1987-02-27 | 1988-07-30 | Институт механики металлополимерных систем АН БССР | Extrusion head for making shaped articles of polymeric materials |
| CN1997468A (en) * | 2004-04-16 | 2007-07-11 | 奎德兰特Epp股份公司 | Electronic power assist steering worm gears |
-
2013
- 2013-12-06 CN CN201310650274.0A patent/CN103660231A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5859820A (en) * | 1981-10-07 | 1983-04-09 | Mitsubishi Rayon Co Ltd | Gear |
| JPS63120617A (en) * | 1986-11-10 | 1988-05-25 | Matsushita Electric Ind Co Ltd | Method for integrally molding intermeshed gears |
| SU1412984A1 (en) * | 1987-02-27 | 1988-07-30 | Институт механики металлополимерных систем АН БССР | Extrusion head for making shaped articles of polymeric materials |
| CN1997468A (en) * | 2004-04-16 | 2007-07-11 | 奎德兰特Epp股份公司 | Electronic power assist steering worm gears |
Non-Patent Citations (1)
| Title |
|---|
| 唐颂超: "《高分子材料成型加工（第三版）》", 31 May 2013, 中国轻工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105216270A (en) * | 2015-09-10 | 2016-01-06 | 天水华天集成电路包装材料有限公司 | A kind of integrated circuit packaging tube extrusion moulding mould and production method |
| CN109608784A (en) * | 2018-11-23 | 2019-04-12 | 余姚市宇洲电器有限公司 | A kind of preparation method of plastic gear igelite |
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Application publication date: 20140326 |