CN104260326A - Thermoplastic plastic film blowing forming mold - Google Patents
Thermoplastic plastic film blowing forming mold Download PDFInfo
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- CN104260326A CN104260326A CN201410576906.8A CN201410576906A CN104260326A CN 104260326 A CN104260326 A CN 104260326A CN 201410576906 A CN201410576906 A CN 201410576906A CN 104260326 A CN104260326 A CN 104260326A
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Abstract
The invention discloses a thermoplastic plastic film blowing forming mold which comprises a mold sleeve and a mold core, wherein a mold orifice is formed in the middle of the mold sleeve; the mold core is arranged in the mold orifice; an annular mold orifice clearance is formed between the mold sleeve and the mold core; heating mechanisms are arranged in both the mold sleeve and the mold core; an inflating hole and an exhaust hole are also formed in the end face of the mold core; the mold core consists of a lower mold core and an upper mold core capable of adjusting lifting on the lower mold core; the mold orifice in the mold sleeve is a horn mouth with a smaller lower part and a larger upper part; the taper of the circumferential surface of the mold orifice is 14-27 degrees; the circumferential surface of the upper mold core is parallel to the circumferential surface of the mold orifice; when the upper mold core rises to reach the highest position, the mold orifice clearance is 3mm; when the upper mold core falls to reach the lowest position, the mold orifice clearance is 1mm. The thermoplastic plastic film blowing forming mold disclosed by the invention has the advantage of mold orifice clearance adjustability and is convenient to use; an enterprise does not need to prepare molds with different mold orifice clearance sizes according to different raw materials and different ratios, and the cost of the enterprise is lowered.
Description
Technical field
The invention belongs to plastic sheeting making apparatus, particularly relate to a kind of thermoplastic blowfilm shaping mould.
Background technology
Most of thermoplastic can produce inflation film with blow moulding, and inflation film is that plastics are extruded into light wall pipe, then while hot with compressed air by plastics inflation, then the film article obtained after cooling and shaping.The film kind that blow moulding is produced has a lot, such as low density polyethylene (LDPE) (LDPE), polypropylene (PP), high density polyethylene (HDPE) (HDPE), nylon (PA), ethene one vinyl acetate copolymer (EVA) etc.
Thermoplastic blowfilm shaping mould, is commonly called as a mouthful mould, and be the critical component carrying out producing inflation film, it is by core rod, and the die sleeve around core rod is formed, and forms the die gap of ring-type between core rod and die sleeve, core rod has air-filled pore and steam vent.Its working method is, the plastics of melting are from die gap extrusion plastic light wall pipe, and compressed air flows out from air-filled pore, by the gas pressure of diffusion, plastics light wall pipe is blown into film.
In film performance, longitudinal contraction rate is an important index, directly has influence on the quality of film quality.And longitudinal contraction rate is relevant with the draw ratio in blown film process, draw ratio affects by die gap, thickness and blow-up ratio again, and its relation is as follows: draw ratio=die gap/(thickness × blow-up ratio).
In addition, different die gaps can affect the film bubble stability of different formulations, and then affects film thickness and flatness.
For this reason, just to different raw materials, different proportionings, need apply different size die gap.But the die gap size of existing thermoplastic blow molding mould is all fixing, for different raw materials, different ratio, enterprise needs the mould being equipped with different die gap size, use inconvenience on the one hand, add the cost of enterprise, also cannot finely tune die gap size on the other hand.
Summary of the invention
Technical problem to be solved by this invention be to provide a kind of can meet without the need to more mold exchange just can realize various die gap size and the thermoplastic blowfilm shaping mould can finely tuned die gap size, to overcome the deficiency that prior art exists.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
A kind of thermoplastic blowfilm shaping mould, comprise die sleeve and core rod, in the middle of described die sleeve, there is die orifice, described core rod is located in described die orifice, the die gap of ring-type is formed between described die sleeve and core rod, described die sleeve and core rod inside are equipped with heating arrangements, the end face of described core rod also has air-filled pore and steam vent, it is characterized in that: described core rod is by lower mold core and the upper mold core of lifting can be regulated in lower mold core to form, the die orifice of described die sleeve becomes lower little large horn mouth, the periphery tapering of die orifice is 14-27 °, the periphery of described upper mold core is parallel with die orifice periphery, upper mold core rises to highest point position, die gap is of a size of 3mm, upper mold core drops to extreme lower position, die gap is of a size of 1mm.
In the specific embodiment of the invention, described lower mold core is cylindrical-shaped structure, and described upper mold core is dome structure, and described upper mold core is enclosed within described lower mold core core, threaded engagement therebetween.
Adopt said structure, the present invention is by being designed to lower mold core and upper mold core composition by core rod, and upper mold core can be elevated in lower mold core, the die orifice of die sleeve is designed to lower little large bell-mouth structure of air simultaneously, so just can adjusts to adapt to generate different film products to die gap size for different material, different ratio.When upper mold core rises, the die gap between upper mold core and die sleeve just becomes large, and when upper mold core declines, the die gap between upper mold core and die sleeve just diminishes.Visible, thermoplastic blowfilm shaping mould of the present invention has the adjustable advantage of die gap, easy to use, no longer need enterprise to configure the mould of different die gap sizes for different material, different ratio, has saved the cost of enterprise.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail:
Fig. 1 is structural representation of the present invention.
Detailed description of the invention
As shown in Figure 1, thermoplastic blowfilm shaping mould of the present invention, comprises die sleeve 100 and core rod 200.
Wherein, have die orifice in the middle of die sleeve 100, core rod 200 is located in this die orifice, forms the die gap 300 of ring-type between die sleeve 100 and core rod 200, and die sleeve 100 and core rod 200 inside are equipped with electrical heating wire 400.Also offer air-filled pore and steam vent at the end face of core rod 200, air-filled pore is communicated with compressed air generating apparatus (not shown) with steam vent by the air flue of core rod 200 inside.
In the present invention, core rod 200 is by lower mold core 201 and the upper mold core 202 of lifting can be regulated in lower mold core 201 to form, particularly, lower mold core 201 is cylindrical-shaped structure, upper mold core 202 is dome structure, and upper mold core 202 is enclosed within lower mold core 201, threaded engagement therebetween.
And die sleeve 100 die orifice becomes lower little large horn mouth, the tapering of die orifice periphery is 14-27 °.The periphery of upper mold core 202 is parallel with die orifice periphery, and the tapering namely going up the periphery of model is identical with the tapering of die orifice periphery.Upper mold core rises to highest point position, and die gap is of a size of 3mm, and upper mold core drops to extreme lower position, and die gap is of a size of 1mm.
In the present embodiment, the height of die sleeve 100 is 200mm.
Adopt said structure, the present invention is by being designed to lower mold core and upper mold core composition by core rod, and upper mold core can be elevated in lower mold core, the die orifice of die sleeve is designed to lower little large bell-mouth structure of air simultaneously, so just can adjusts to adapt to generate different film products to die gap size for different material, different ratio.When upper mold core rises, the die gap between upper mold core and die sleeve just becomes large, and when upper mold core declines, the die gap between upper mold core and die sleeve just diminishes.
Can be found out by foregoing detailed description, thermoplastic blowfilm shaping mould of the present invention has the adjustable advantage of die gap, easy to use, no longer need enterprise to configure the mould of different die gap sizes for different material, different ratio, saved the cost of enterprise.
The above; it is only preferred embodiment of the present invention; not any pro forma restriction is done to the present invention; have in any art and usually know the knowledgeable; if in the protection domain not departing from claim proposed by the invention; utilize the Equivalent embodiments that the local done by disclosed technology contents is changed or modified, and do not depart from technical characteristic content of the present invention, all still belong in the scope of the technology of the present invention feature.
Claims (2)
1. a thermoplastic blowfilm shaping mould, comprise die sleeve and core rod, in the middle of described die sleeve, there is die orifice, described core rod is located in described die orifice, the die gap of ring-type is formed between described die sleeve and core rod, described die sleeve and core rod inside are equipped with heating arrangements, the end face of described core rod also has air-filled pore and steam vent, it is characterized in that: described core rod is by lower mold core and the upper mold core of lifting can be regulated in lower mold core to form, the die orifice of described die sleeve becomes lower little large horn mouth, the periphery tapering of die orifice is 14-27 °, the periphery of described upper mold core is parallel with die orifice periphery, upper mold core rises to highest point position, die gap is of a size of 3mm, upper mold core drops to extreme lower position, die gap is of a size of 1mm.
2. thermoplastic blowfilm shaping mould according to claim 1, it is characterized in that: hot described lower mold core is cylindrical-shaped structure, described upper mold core is dome structure, and described upper mold core is enclosed within described lower mold core core, threaded engagement therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410576906.8A CN104260326B (en) | 2014-10-24 | Thermoplastic blowfilm shaping mould |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410576906.8A CN104260326B (en) | 2014-10-24 | Thermoplastic blowfilm shaping mould |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104260326A true CN104260326A (en) | 2015-01-07 |
| CN104260326B CN104260326B (en) | 2017-01-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115157632A (en) * | 2022-07-18 | 2022-10-11 | 闽南师范大学 | Degradable plastic film blowing device and blowing method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069582A (en) * | 2010-11-24 | 2011-05-25 | 浙江德玛克机械有限公司 | Capacity adjustment device of rotary bottle blowing die |
| US20120076965A1 (en) * | 2009-09-22 | 2012-03-29 | Graham Packaging Lc, L.P. | Pet containers with enhanced thermal properties and process for making same |
| CN102596537A (en) * | 2009-08-25 | 2012-07-18 | Khs科波普拉斯特有限责任公司 | Method and device for blow molding containers |
| CN102729455A (en) * | 2012-07-11 | 2012-10-17 | 马革 | Molding blowing system capable of shortening plastic hollow molding period and control method of molding blowing system |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102596537A (en) * | 2009-08-25 | 2012-07-18 | Khs科波普拉斯特有限责任公司 | Method and device for blow molding containers |
| US20120076965A1 (en) * | 2009-09-22 | 2012-03-29 | Graham Packaging Lc, L.P. | Pet containers with enhanced thermal properties and process for making same |
| CN102069582A (en) * | 2010-11-24 | 2011-05-25 | 浙江德玛克机械有限公司 | Capacity adjustment device of rotary bottle blowing die |
| CN102729455A (en) * | 2012-07-11 | 2012-10-17 | 马革 | Molding blowing system capable of shortening plastic hollow molding period and control method of molding blowing system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115157632A (en) * | 2022-07-18 | 2022-10-11 | 闽南师范大学 | Degradable plastic film blowing device and blowing method thereof |
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