CN207190230U - A kind of PVC spools mould - Google Patents
A kind of PVC spools mould Download PDFInfo
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- CN207190230U CN207190230U CN201721027135.2U CN201721027135U CN207190230U CN 207190230 U CN207190230 U CN 207190230U CN 201721027135 U CN201721027135 U CN 201721027135U CN 207190230 U CN207190230 U CN 207190230U
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- die holder
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Abstract
The technical field of mould for plastics is the utility model is related to, more particularly, to a kind of PVC spools mould.PVC spools mould of the present utility model, the size in gap avoids melt drastically changing to produce larger die swelling power due to passage when leaving mould between diameter of bore and mouth mold and core rod by increasing mouth mold, longitudinal length by shortening shunting die holder prevents melt residence time long melt internal stress to be formed in shunting die holder, and excessive back pressure is avoided the formation of quickly through spreader by the volume melt for increasing the second straight channel formed between spreader and die holder.The drastically change of channel size when can avoid the melt from leaving mould, the die swelling power of melt, Improving The Quality of Products and production stability are reduced, and it is compact-sized, production operation is simple, can ensure the quality of product while lifting product yield.
Description
Technical field
The technical field of mould for plastics is the utility model is related to, more particularly, to a kind of PVC spools mould.
Background technology
PVC spools are high, corrosion-resistant, very rapid from the development of the excellent properties such as heavy and light, safe and convenient because of its compressive resistance.For
Meet demand increasing demand of the market to PVC spools, PVC spools one go out four moulds and arisen at the historic moment.PVC spools one go out
Four mould structures are simple, simple operation, can accelerate speed of production, improve production efficiency, have good practicality and economy
Property.
Conventional PVC spools one go out four moulds, and due to pursuing the production of high speed, pipeline production stability is poor, melt be present
Die swelling power is excessive, melt it is unstable so as to cause line size and bad order, the problems such as percent defective is high.Therefore, having must
A kind of PVC spool moulds of reduction melt die swelling power while product plasticizing is ensured are obtained by the structure optimization of mould
Tool.
The content of the invention
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of PVC spools mould, using low-pressure
Mold design, in process of production, the die swelling power that product is reduced while product plasticizing is ensured, assign PVC spools with good
Good size and outward appearance, reduce production percent defective, and it is compact-sized, production operation is simple, have good practicality with it is economical
Property.
In order to solve the above technical problems, the technical solution adopted in the utility model is：
A kind of PVC spools mould, including shunting die holder, spreader, mouth mold, core rod and outer die body are provided, it is characterised in that
The core rod forms sizing section passage with external mold body, and the sizing section passage includes the first tapered channel and the first straight channel,
The diameter of bore of the mouth mold is 12mm ~ 60mm, and the size in gap is 1.2mm ~ 7.2mm between the mouth mold and core rod.
The core rod of the utility model PVC spool moulds forms sizing section passage with external mold body, and the sizing section passage includes
First tapered channel and the first straight channel, the diameter of bore of the mouth mold change and changed with PVC spools specification, are PVC lines
1.05-1.15 times of pipe diameter, it is 12mm ~ 60mm；The size in gap also becomes with PVC spools specification between the mouth mold and core rod
Change and change, be 0.8-1.2 times of PVC spool wall thickness, be 1.2mm ~ 7.2mm；And the endoporus chi of conventional PVC spool mould mouth molds
Very little is 10mm ~ 55mm, and the size in gap is 1.05mm ~ 6mm between mouth mold and core rod, the utility model PVC spool mould mouth molds
Diameter of bore increase, the gap between mouth mold and core rod also increased, and it is in order to avoid melt is leaving mould so to design
Larger die swelling power is produced during tool due to drastically changing for passage, the PVC lines of flat appearance, steady quality can be obtained
Pipe.
Further, the first tapered channel size is to the first straight channel direction from greatly to small transformation, and described first
Straight channel size keeps constant.When melt is by the first tapered channel, by thick thinning, external diameter from large to small, progressively stretches；It is molten
Body obtains further compression compact in the first straight channel, completes plasticizing and shaping of the melt in mould.
Further, the diameter of bore of the mouth mold is 1.1 ~ 1.2 times of PVC spool diameters, and size is 32mm ~ 60mm,
Gap size between the mouth mold and core rod is 1.0 ~ 1.2 times of PVC spool wall thickness, and size is 3.6mm ~ 7.2mm.It is such
Size design be in order to realize ensure melt plasticizing on the premise of at utmost increase mouth mold diameter of bore and mouth mold and core rod it
Between gap, so as to reduce the die swelling power of melt, ensure the stability of product.
Further, the shunting die holder side is fixedly connected with linkage section, and opposite side is fixedly connected with die holder, described point
Stream die holder includes four identical melt flow channels, melt flow channel to die holder direction from depth to shallow, size from large to small.So design
Be in order that melt is divided into four stock material streams after shunting the shunting action of die holder by one stream, runner from large to small, by
Shoal deeply, pressure gradually increases so that melt balancedly splits into four parts.
Further, the longitudinal length of the shunting die holder is 160mm ~ 250mm, and the longitudinal length of conventional PVC spools
For 200 ~ 280mm, the design that the longitudinal length of the utility model PVC spool mold diversion die holders shortens is to prevent divergent die
Excessive pressure is formed in seat causes melt to be stopped in die holder long and form melt internal stress, also for melt in plasticizing
Excessive resistance is not produced simultaneously.
Further, the longitudinal length of the shunting die holder is 160mm ~ 200mm, and such size design is to realize
At utmost reduce melt internal stress while melt plasticizing is ensured, and be applied to being processed into for the PVC spools of different size
Type.
Further, the spreader, which is arranged on the center line of PVC spool moulds and is threadably secured, is connected to mould
On seat, the spreader includes angle conical section and flat segments, and angle conical section, flat segments form the second taper with die holder respectively
Passage and the second straight channel.Melt enters in each small die body is split into hollow circle after spreader by one section of solid,
Sufficiently plastified in a heated condition.
Further, the second tapered channel size from die holder from greatly to small transformation, second straight channel
Size keeps constant, and the volume of second straight channel is 800mm3~4000mm3, the size of the second tapered channel is from greatly to small
Change, further Dispersion Fusion between molecular melt, melt strength gets a promotion；The body of the straight channel of conventional PVC spool moulds
Product is 600mm3~3000mm3, the design of channel volume of the present utility model increase be in order that melt can quickly through point
Shuttle is flowed, avoids bringing excessive back pressure to the melt moved in the second tapered channel and the second straight channel, improves PVC spools
The gloss uniformity on surface.
Further, the volume of second straight channel is 2800mm3~4000mm3, such size design be in order to
At utmost accelerate melt by the speed of spreader under the premise of melt operation and plasticizing smoothly is ensured so as to avoid back pressure
Generation, and suitable for different size PVC spools machine-shaping.
Further, the PVC spools mould also includes shrinking set, and the set fixed and arranged of shrinking is in outer die body and shunting
Between shuttle, described shrink forms triconic passage between set and spreader, and the size of the triconic passage is from die holder to mouth
Mould direction is from greatly to small transformation.Stepwize Shrink when melt flows through the triconic passage of size from large to small, reduce cutting for melt
Face area, there is stretching action to melt so that further Dispersion Fusion, melt strength are lifted between molecular melt.
Compared with prior art, the beneficial effects of the utility model are：
PVC spools mould of the present utility model, gap between the diameter of bore and mouth mold and core rod by increasing mouth mold
Size avoids melt from producing larger die swelling power due to drastically changing for passage when leaving mould, is shunted by shortening
The longitudinal length of die holder prevents the melt internal stress that melt residence time in shunting die holder is long and is formed, and is shunted by increasing
The volume of the second straight channel formed between shuttle and die holder causes melt to avoid the formation of excessive back pressure quickly through spreader.This
Utility model is by optimizing mould flow passage structure, with reference to mouth mold, the core rod parameter of sizing section, passage when avoiding the melt from leaving mould
The drastically change of size, the die swelling power of melt, Improving The Quality of Products and production stability are reduced, and it is compact-sized,
Production operation is simple, and percent defective reduces, and has good practicality and economy.
Brief description of the drawings
Fig. 1 is the structural representation of PVC spool moulds.
Embodiment
The utility model is further described with reference to embodiment.Wherein, being given for example only property of accompanying drawing
Illustrate, expression is only schematic diagram, rather than pictorial diagram, it is impossible to is interpreted as the limitation to this patent；In order to which this reality is better described
With new embodiment, some parts of accompanying drawing have omission, zoomed in or out, and do not represent the size of actual product；To ability
For field technique personnel, some known features and its explanation may be omitted and will be understood by accompanying drawing.
Same or analogous label corresponds to same or analogous part in the accompanying drawing of the utility model embodiment；In this practicality
In new description, it is to be understood that if thering is the orientation of the instructions such as term " on ", " under ", "left", "right" or the position relationship to be
Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than instruction
Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore retouched in accompanying drawing
State term the being given for example only property explanation of position relationship, it is impossible to the limitation to this patent is interpreted as, for the common skill of this area
For art personnel, the concrete meaning of above-mentioned term can be understood as the case may be.
Embodiment 1
The first embodiment for the utility model PVC spool moulds includes shunting die holder 2, spreader 4, mouth as shown in Figure 1
Mould 6, core rod 8 and outer die body 9, core rod 8 and outer die body 9 form sizing section passage, sizing section passage include the first tapered channel with
First straight channel, the first tapered channel size is to the first straight channel direction from greatly to small transformation, first straight channel
Size keeps constant.When melt is by the first tapered channel, by thick thinning, external diameter from large to small, progressively stretches；Melt is first
Further compression compact is obtained in straight channel, completes plasticizing and shaping of the melt in mould.The diameter of bore of mouth mold 6 is
1.1 ~ 1.2 times of PVC spool diameters, size are 32mm ~ 60mm, and the gap size between mouth mold 6 and core rod 8 is PVC spool walls
Thick 1.0 ~ 1.2 times, size is 3.6mm ~ 7.2mm, ensures at utmost to increase mouth mold hole size on the premise of melt plasticizing
And the gap between mouth mold and core rod, so as to reduce the die swelling power of melt, ensure the stability of product.
The shunting side of die holder 2 is fixedly connected with linkage section 1, and opposite side is fixedly connected with die holder 3, and the shunting die holder 2 wraps
Include four identical melt flow channels, melt flow channel to the direction of die holder 3 from depth to shallow, size from large to small, melt passes through divergent die
Four stock material streams are divided into by one stream after the shunting action of seat, from large to small, from depth to shallow, pressure gradually increases runner so that
Melt balancedly splits into four parts.The longitudinal length for shunting die holder 2 is 160mm ~ 200mm, can prevent from shunting shape in die holder
Cause melt to be stopped in die holder long into excessive pressure and form melt internal stress, it is also ensured that melt is in the same of plasticizing
When do not produce excessive resistance, and the machine-shaping of the PVC spools suitable for different size.
It is connected in addition, spreader 4 is arranged on the center of PVC spool moulds and is threadably secured on die holder 3, described point
Stream shuttle 4 includes angle conical section and flat segments, and angle conical section, flat segments form the second tapered channel and second with die holder respectively
Straight channel, melt enters in each small die body is split into hollow circle after spreader 4 by one section of solid, in heating condition
Under sufficiently plastified.Second tapered channel size is from die holder 3 from being kept to small transformation, the size of the second straight channel greatly
Constant, the volume of the second straight channel is 600mm3~3000mm3, melt can be intermolecular further to divide quickly through spreader 4
Fusion is dissipated, melt strength gets a promotion.5 fixed and arrangeds of set are shunk between outer die body 9 and spreader 4, shrink set 5 and spreader
Triconic passage is formed between 4, the size of triconic passage is from die holder 3 to the direction of mouth mold 6 from being flowed through to small transformation, melt greatly
Stepwize Shrink during size triconic passage from large to small, reduces the area of section of melt, has stretching action to melt so that
Further Dispersion Fusion, melt strength are lifted between molecular melt.
The application method of the present embodiment is as follows：
Melt enters mould by the feeding mouth of linkage section 1, and is divided into by the shunting action of shunting die holder 2 by one stream
Four stock material streams.From large to small, from depth to shallow, pressure gradually increases runner so that melt equilibrium splits into four parts.It is divided into four
The melt of stock, by leading into each small die body for die holder 3, by the shunting of spreader 4 in small die body, melt is by one section of reality
Heart body is split into hollow circle.By the melt of spreader 4, the passage formed between 5 is covered by shrinking, Stepwize Shrink,
By the contraction of melt, reduce the cross-sectional volume of melt, while form certain stretching, by melt appearance and size progressively by big picture
Small transformation so that the further Dispersion Fusion of molecule between melt, lift melt strength.Melt is directed to up to mould by contraction set 5
Has the sizing section that mouth mold 6 and core rod 8 form, the passage for section of shaping is certain angle bullet, by the tapered channel by melt
Progressively by thickness draw it is thin, external diameter from large to small, progressively stretches, eventually arrive at mould outlet formed by mouth mold 6 with core rod 8 it is straight
Section, further compression compact melt, complete plasticizing and shaping of the melt in mould.
Four stock material streams are divided into by one stream by above step melt, four stock material streams flow through what spreader was formed with die holder
After straight channel, after mouth mold and the sizing section of core rod composition, the die swelling power of PVC spools reduces, and assigns PVC spools with good
Good size and outward appearance, reduce production percent defective, and it is compact-sized, production operation is simple, have good practicality with it is economical
Property.
Obviously, above-described embodiment of the present utility model is only intended to clearly illustrate the utility model example, and
It is not the restriction to embodiment of the present utility model.For those of ordinary skill in the field, in described above
On the basis of can also make other changes in different forms.There is no need and unable to give all embodiments
It is exhaustive.All made within spirit of the present utility model and principle all any modification, equivalent and improvement etc., should be included in
Within the protection domain of the utility model claims.
Claims (10)
1. a kind of PVC spools mould, including shunting die holder（2）, spreader（4）, mouth mold（6）, core rod（8）With outer die body（9）, its
It is characterised by, the core rod（8）With outer die body（9）Sizing section passage is formed, the sizing section passage includes the first tapered channel
With the first straight channel, the mouth mold（6）Diameter of bore be 12mm ~ 60mm, the mouth mold（6）And core rod（8）Between gap
Size be 1.2mm ~ 7.2mm.
2. PVC spools mould according to claim 1, it is characterised in that the first tapered channel size is flat to first
Straight channel direction is to small transformation, the first straight channel size keeps constant greatly.
3. PVC spools mould according to claim 1 or 2, it is characterised in that the mouth mold（6）Diameter of bore be
32mm ~ 60mm, the mouth mold（6）And core rod（8）Between gap size be 3.6mm ~ 7.2mm.
4. PVC spools mould according to claim 1, it is characterised in that the shunting die holder（2）Side and linkage section
（1）It is fixedly connected, opposite side and die holder（3）It is fixedly connected, the shunting die holder includes four identical melt flow channels, melt flow
Road is to die holder（3）Direction from depth to shallow, size from large to small.
5. the PVC spool moulds according to claim 1 or 4, it is characterised in that the shunting die holder（2）Longitudinal length
For 160mm ~ 250mm.
6. PVC spools mould according to claim 5, it is characterised in that the shunting die holder（2）Longitudinal length be
160mm~200mm。
7. PVC spools mould according to claim 1, it is characterised in that the spreader（4）Located at PVC spool moulds
Center line on and be threadably secured and be connected to die holder（3）On, the spreader（4）Including angle conical section and flat segments,
The angle conical section, flat segments respectively with die holder（3）Form the second tapered channel and the second straight channel.
8. PVC spools mould according to claim 7, it is characterised in that the second tapered channel size is from die holder（3）
Rise from keeping constant to small transformation, the size of second straight channel greatly, the volume of second straight channel is 800mm3~
4000mm3。
9. PVC spools mould according to claim 8, it is characterised in that the volume of second straight channel is
2800mm3~4000mm3。
10. PVC spools mould according to claim 1, it is characterised in that the PVC spools mould also includes shrinking set
（5）, it is described to shrink set（5）Fixed and arranged is in outer die body（9）With spreader（4）Between, it is described to shrink set（5）With spreader（4）
Between form triconic passage, the size of the triconic passage is from die holder（3）To mouth mold（6）Direction is from greatly to small transformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721027135.2U CN207190230U (en) | 2017-08-16 | 2017-08-16 | A kind of PVC spools mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721027135.2U CN207190230U (en) | 2017-08-16 | 2017-08-16 | A kind of PVC spools mould |
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| Publication Number | Publication Date |
|---|---|
| CN207190230U true CN207190230U (en) | 2018-04-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721027135.2U Active CN207190230U (en) | 2017-08-16 | 2017-08-16 | A kind of PVC spools mould |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109676891A (en) * | 2018-12-20 | 2019-04-26 | 山东东宏管业股份有限公司 | One kind is for non-excavation rehabilitation hdpe pipe and preparation method thereof |
-
2017
- 2017-08-16 CN CN201721027135.2U patent/CN207190230U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109676891A (en) * | 2018-12-20 | 2019-04-26 | 山东东宏管业股份有限公司 | One kind is for non-excavation rehabilitation hdpe pipe and preparation method thereof |
| CN109676891B (en) * | 2018-12-20 | 2021-07-02 | 山东东宏管业股份有限公司 | High-density polyethylene pipe for trenchless restoration and preparation method thereof |
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