CN202213185U - Screw head of extruder - Google Patents
Screw head of extruder Download PDFInfo
- Publication number
- CN202213185U CN202213185U CN2011202914659U CN201120291465U CN202213185U CN 202213185 U CN202213185 U CN 202213185U CN 2011202914659 U CN2011202914659 U CN 2011202914659U CN 201120291465 U CN201120291465 U CN 201120291465U CN 202213185 U CN202213185 U CN 202213185U
- Authority
- CN
- China
- Prior art keywords
- screw head
- extruder
- screw
- utility
- head
- Prior art date
- 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.)
- Expired - Fee Related
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Classifications
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
Abstract
The utility model belongs to the technical field of chemical equipment and relates to a screw head of an extruder, which solves the problems that temperature of die outlets of existing double screw extruders is ununiform in distribution so that breakage or instability of extrudate is easy to occur. The screw head of the extruder in a semi-oval shape can solve the above technical problems effectively.
Description
Technical field
The utility model belongs to technical field of chemical, relates to a kind of extruder screw head, and said extruder refers generally to double screw extruder.
Background technology
Thermoplastic elastomer (TPE) (being called for short TPE, thermoplastic Elastic) product has the high resiliency of sulphur rubber concurrently, resistance to ag(e)ing, and each item performances such as oil resistivity are the environment-friendly materials of world standard.
The TPE elastomer adopts double screw extruder to carry out melt blending processing more, and Fig. 1 has showed a kind of double screw extruder head, the screw head 3 that this head comprises machine barrel 12, is positioned at the screw rod 11 of machine barrel 12 and is fixed on screw rod 11 1 ends; Said screw head 3 is tapered, and such shape in melt blending processing, causes the problem of two aspects: first easily; Space between screw head 3 and the machine barrel 12 is bigger, exists the dead angle to hide material easily, causes the product jaundice; Even degraded; This phenomenon is ubiquity in plastic processing is produced, but concerning thermoplastic elastomer (TPE), influences obvious especially; Because the TPE hear resistance is poor, along with temperature its rerum natura decline by a big margin (also being flavescence) that rises; The second, screw head 3 causes extruding dies exit 14 temperature distributing disproportionations even easily, and internal and external temperature differs and can reach 80 ℃, causes frequent fracture of wire or instability.
The utility model content
The utility model technical problem to be solved is that existing double screw extruder causes extruding dies exit temperature distributing disproportionation even easily, causes extrudate fracture of wire or problem of unstable, and to this problem a kind of extruder screw head is provided.
The utility model solves the problems of the technologies described above through following technical scheme:
A kind of extruder screw head is characterized in that said screw head is half rugby shape.
Before the utility model; Tapered as common screw is first (the background technology part is showed) is in the screw head rotating process, when fused materials passes through the common screw head; Be not easy to be scatter; Generally remain two parallel columns, thereby be unfavorable for the equally distributed of heat, cause double screw extruder mouth mould exit temperature distributing disproportionation even.
After screw head was arranged to half rugby shape, fused materials can be centered around around the screw head, and tiling uniformly makes uniform heat distribution and then double screw extruder mouth mould exit uniformity of temperature profile.
Simultaneously, than the common screw head, half rugby shape screw head and the space that holds between the machine barrel of screw rod will be compressed; The detention space that also is fused materials is extruded; Make material shorten greatly in the machine barrel internal stops time relatively, prevent the extruded product jaundice, even degraded.
Said screw head top rounding off.Thereby prevent the fracture of screw head top.
Further, the radian of the said screw head of the utility model is 0.8-1.0.
General, be certain because extruder holds the length of the machine barrel of screw rod, so the radian of screw head can not be less than 0.8; Otherwise screw head is not easy to close up, and the radian of screw head can not be certain because extruder holds the shape of the machine barrel of screw rod greater than 1.0; Radian is excessive, the length that makes screw head is restricted, thereby the space between said machine barrel and the screw head will increase; The dead angle of material occurs hiding easily, cause the extruded product jaundice, even degraded.
The effect of using the said a kind of extruder screw head of the utility model is significantly, the effect of three aspects below for example existing at least:
1. the temperature of homogenizing outlet melt reduces inside and outside temperature difference, makes process stabilizing;
2. reduction melt temperature;
3. promote to mix, improve material performance.
Description of drawings
Fig. 1 is the structural representation of the said a kind of double screw extruder head of background technology part;
Fig. 2 is the structural representation of the said a kind of double screw extruder head of embodiment.
The specific embodiment
Embodiment
Like Fig. 2; A kind of double screw extruder head comprises a kind of extruder screw head 2; Be half rugby shape, the surface has no groove, and said extruder is a STS75 type double screw extruder; Said extruder screw head 2 is fixed on screw rod 5 one ends through holder, and said holder comprises the fixed handle 4 that stretches in the screw rod 5 and the fixed cylinder 3 of standing screw head 2.
The length of said extruder screw head 2 is 91.51mm, and radian is 1.0, and along with screw rod rotates, fused materials is coating dried 2 on half rugby shape spiral shell equably and moving ahead, up to arriving a mouthful mould outlet 6.
More than show and described the advantage of basic principle, principal character and the utility model of the utility model.The technical staff of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; The utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.
Claims (3)
1. an extruder screw head is characterized in that said screw head is half rugby shape.
2. a kind of extruder screw head according to claim 1, the radian that it is characterized in that said screw head is 0.8-1.0.
3. according to claim 1 or 2 said a kind of extruder screw heads, it is characterized in that said screw head top rounding off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202914659U CN202213185U (en) | 2011-08-11 | 2011-08-11 | Screw head of extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202914659U CN202213185U (en) | 2011-08-11 | 2011-08-11 | Screw head of extruder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202213185U true CN202213185U (en) | 2012-05-09 |
Family
ID=46012454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202914659U Expired - Fee Related CN202213185U (en) | 2011-08-11 | 2011-08-11 | Screw head of extruder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202213185U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194283A (en) * | 2014-09-02 | 2014-12-10 | 安特普工程塑料（苏州）有限公司 | High-performance thermoplastic elastomer and processing method thereof |
-
2011
- 2011-08-11 CN CN2011202914659U patent/CN202213185U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104194283A (en) * | 2014-09-02 | 2014-12-10 | 安特普工程塑料（苏州）有限公司 | High-performance thermoplastic elastomer and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120509 Termination date: 20170811 |