CN101314254B - Extrusion mould head for plastic tube - Google Patents
Extrusion mould head for plastic tube Download PDFInfo
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- CN101314254B CN101314254B CN2008100628195A CN200810062819A CN101314254B CN 101314254 B CN101314254 B CN 101314254B CN 2008100628195 A CN2008100628195 A CN 2008100628195A CN 200810062819 A CN200810062819 A CN 200810062819A CN 101314254 B CN101314254 B CN 101314254B
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Abstract
The invention discloses a plastic pipe extrusion die head, comprising a core die (1) fixed on a die core rear body (4), a die (2) the left end face of which is parallel to the left end face of the core die (1), an adjusting seat (3), an outer die rear body (5) the right end of which is fixed with the right end of the die core rear body (4) and adjusting screws (9) the number of which is multiple of four, wherein, the die (2) is connected with the adjusting seat (3) through the adjusting screws (9) which are uniformly distributed on the die and axes of which are parallel to the axis of the diehead; the center of the right end of the die (2) is a concave spherical surface I(12); the center of the right end of the adjusting seat (3) is a convex spherical surface II(13); and the concave spherical surface I(12) and the convex spherical surface II(13)are mutually attached. The plastic pipe extrusion die head has the advantages that: the plastic pipe extrusion die head not only can simply adjust a gap of a straight section between a core die outer wall and a die inner wall, but also can make plastics flow smoothly in the die head in the adjusting process, without accumulation, coke charge and leakage.
Description
Technical field:
The present invention relates to a kind of extrusion die, specifically is that a kind of tube wall thickness of can adjusting makes it uniform extrusion mould head for plastic tube.
Background technology:
The prior art extrusion mould head for plastic tube as shown in Figure 1, generally comprises behind core 1, mouthful mould 2, the core rod body 5 behind body 4 and the external mold; Between described core 1 outer wall and mouthful mould 2 inwalls is material channel outlet section 6; Be material channel entrance 7 between body 5 inwalls behind described core rod 4 outer walls and the external mold; Described material channel outlet section 6 communicates with material channel entrance 7; The right-hand member of described core 1 screws on core seat 8 by screw thread; Described core seat 8 is fixed on behind the core rod on the body 4 by screw; The right-hand member of body 4 is fixed on the right-hand member of body 5 behind the external mold behind the described core rod by screw; The left side of described core 1 is concordant with the left side of mouthful mould 2.The prior art extrusion mould head for plastic tube of said structure is adjusted the uniform purpose of tube wall thickness in order to reach, the position of left end access hole mould 2 right-hand members of body 4 has been screwed one and has adjusted seat 3 behind external mold, be evenly distributed with four or eight or 16 on the circumferential surface of described adjustment seat 3 and adjust screws 9, described adjustment screw 9 can radially be adjusted along die head; Described mouthful of mould 2 right-hand members are positioned at adjusts seat 3 left ends, and its external diameter withstands less than the internal diameter of adjustment seat 3 left ends and the adjustment screw 9 that evenly distributed.The straight section part gap length of described material channel outlet section 6 is that the straight section part gap length between core 1 outer wall and mouthful mould 2 inwalls is a decisive factor of extruding pipe shape and wall thickness, therefore, adjust the consistent purpose that can reach even adjustment plastic pipe wall thickness of straight section part gap length between core 1 outer wall and mouth mould 2 inwalls, and the prior art extrusion mould head for plastic tube is exactly to realize moving radially of mouthful mould 2 by the moving radially of adjusting everywhere of adjustment screw 9, thereby change the gap between core 1 outer wall and mouthful mould 2 inwalls, reach and adjust the wall thickness of extruding pipe.In addition, in order to prevent from the tubing extrusion, to take place to leak the material phenomenon, the left side of the mouth mould 2 right side people having the same aspiration and interest bed rearrangements 3 of prior art extrusion mould head for plastic tube need tightly be developed, thereby realization flat seal, for this reason, the mode of prior art extrusion die employing is with a pressing plate 10 mouth mould 2 usefulness housing screws 11 to be pressed on to adjust on the seat 3.
There are following three weak points in actual applications in the prior art extrusion mould head for plastic tube of said structure:
1, when the gap of adjusting between core outer wall and mouthful mould inwall, because mouthful mould is pressed on by pressing plate and adjusts on the seat, be difficult to move a mouthful mould so directly adopt radiai adjustment to adjust screw, the operator needs suitably to unclamp earlier the housing screw on the pressing plate, again in the adjusting of radially adjusting screw, mouthful mould is moved radially to the direction that the adjustment screw moves, thereby realize the adjustment in the gap between core outer wall and mouthful mould inwall, after adjusting finishes, fastening again housing screw is to guarantee developing of contact-making surface, we are not difficult to find that it is comparatively loaded down with trivial details that the set-up procedure of prior art extrusion mould head for plastic tube seems from above-mentioned adjustment process;
2, when tubing is extruded, owing to exist bigger pressure in the material channel outlet section, therefore, after housing screw is suitably unclamped, under the effect of pressure, the right side of core tiny gap will occur with the left side of adjusting seat, thereby causes partly plastic to spill by this tiny gap, the material phenomenon occurs leaking.
3, because the contact area between core right side and the adjustment seat left side is not very big, therefore, core right side and the situation of adjusting the dislocation of seat left side may appear behind the gap of adjusting between core outer wall and mouthful mould inwall, and form the bigger crescent step in two places, thereby not only plastics mobile in die head caused certain obstruction, plastics are piled up and the phenomenon of burnt material but also can form.
Summary of the invention:
The technical problem to be solved in the present invention is, a kind of gap that not only can simply adjust straight section part between core outer wall and mouthful mould inwall is provided, and be in course of adjustment that plastics are flowed is level and smooth, smooth and easy in die head, and do not have accumulations, do not have burnt material and do not have the extrusion mould head for plastic tube that leaks the generation of material phenomenon.
Technical solution of the present invention is that a kind of extrusion mould head for plastic tube with following structure is provided: body and quantity are the adjustment screw of four multiple behind the external mold that it comprises core, its left side mouth mould concordant with the left side of core, adjust body behind seat, the core rod, the right-hand member of body is fixed behind its right-hand member and the core rod; The right-hand member of described core is fixed on behind the core rod on the body by the core seat; Described mouthful mould is connected with adjusting by the adjustment screw that not only plays the effect of fixing port mould but also play the adjusting play effect; It is parallel with the die head axis that described adjustment screw is evenly distributed on mouthful mould and adjusts the axis of screw; The centre of described mouthful of mould right-hand member circle is the concave spherical surface I of indent; The described centre of adjusting the left end circle of seat is the protruding sphere II of evagination; Described concave spherical surface I and protruding sphere II are close to mutually; Described concave spherical surface I and protruding sphere II all are smooth; Described mouthful of mould right-hand member other end face parts except that concave spherical surface I are the inclined-plane that is tilted to the left.
After adopting above structure, compared with prior art, the present invention has the following advantages:
1, the axis of the adjustment screw among the present invention is parallel with the die head axis and be evenly distributed on mouthful mould, it had both played the effect of fixing port mould, played the effect of adjusting play again, therefore in the process of adjusting play, the operator only needs directly to regulate the adjustment screw can realize the adjustment in gap, need not could adjust screw in radiai adjustment again as the housing screw that prior art needs suitably to unclamp in advance on the pressing plate, therefore gap of the present invention adjustment process seems fairly simple.
2, when tubing is being extruded needs adjustment tube wall thickness, the operator can directly adjust the adjustment screw on mouthful mould, thereby the concave spherical surface I that makes mouthful mould can form the rotation of certain angle along the protruding sphere II that adjusts seat, because the sealing area of two spheres is bigger, even so exist bigger pressure in the material channel outlet section, the right side of core and adjust also can not separated fully between the left side of seat and tiny gap be occurred, all the time have the contact-making surface of being close to mutually between them, so the present invention has prevented that effectively die head from leaking the generation of material phenomenon.
3; when the present invention is in the adjustment state; the mouth mould can be along certain angular turn; the port of export of mouth mould is that the rotation variation of straight section part generally can be greatly; and the rotation of its land portions variation generally is very little; when the gap between adjustment mouthful mould inwall and the core outer wall; but concave spherical surface I and protruding sphere II be close to the contact position only need very low-angle rotation just the port of export of counterpart mould play clearly rotation; therefore; the dislocation of two sphere contact portions is very little; it is to the not influence of flowing almost of plastics; it is level and smooth that it can make plastics flow in die head; smooth and easy, and do not produce the phenomenon that plastics are piled up and Jiao expects.
Fitting tightly after smooth concave spherical surface I and protruding sphere II can better guarantee mouthful mould and adjust the seat assembling, thereby the appearance of anti-leak-stopping material phenomenon better.
It is to take place in order to prevent to be in course of adjustment that mouthful mould right-hand member other end face parts except that concave spherical surface I bump interference with the protruding sphere II of sphere that adjusts and the adjustment that influences the gap that mouth mould right-hand member other end face parts except that concave spherical surface I all are processed into the inclined-plane that is tilted to the left.
Description of drawings:
Fig. 1 is the sectional structure schematic diagram (structure of the prior art extrusion mould head for plastic tube that Fig. 1 has been shown in the background technology of this specification has been done comparatively detailed description) of prior art extrusion mould head for plastic tube.
Fig. 2 is the adjusted sectional structure schematic diagram of extrusion mould head for plastic tube of the present invention.
Fig. 3 is that the A of extrusion die among Fig. 2 is to structural representation.
Fig. 4 is that extrusion die is not adjusted preceding A to structural representation among Fig. 2.
Shown in the figure: 1, core, 2, mouthful mould, 3, adjust seat, 4, body behind the core rod, 5, body behind the external mold, 6, material channel outlet section, 7, the material channel entrance, 8, the core seat, 9, adjust screw, 10, pressing plate, 11, housing screw, 12, concave spherical surface I, 13, protruding sphere II, 14, heating collar.
Specific embodiment:
The invention will be further described below in conjunction with the drawings and specific embodiments:
As shown in Figure 2, in this specific embodiment, extrusion mould head for plastic tube of the present invention comprises that body 5 behind body 4 behind core 1, mouthful mould 2, the core rod, the external mold and quantity are the adjustment screw 9 of four multiple, the quantity of described adjustment screw 9 is that four multiple is meant, the quantity of adjusting screw 9 can be four, eight or 16, in this specific embodiment, the quantity of described screw 9 is eight.In this specific embodiment, be material channel outlet section 6 between described core 1 outer wall and mouthful mould 2 inwalls; Be material channel entrance 7 between body 5 inwalls behind described core rod 4 outer walls and the external mold; Described material channel outlet section 6 communicates with material channel entrance 7; The right-hand member of described core 1 screws on core seat 8 by screw thread.In this specific embodiment, described right-hand member refers to that the right of Fig. 2 is a right-hand member, and the left side of Fig. 2 is a left end.Described core seat 8 is fixed on behind the core rod on the body 4 by screw; The right-hand member of body 4 is fixed on the right-hand member of body 5 behind the external mold behind the described core rod by screw; The left side of described core 1 is concordant with the left side of mouthful mould 2; Described mouthful of mould 2 is connected with adjustment seat 3 by adjusting screw 9; Described eight adjustment screws 9 are evenly distributed on the right-hand member of mouthful mould 2, and the axis of described adjustment screw 9 is parallel with the die head axis; In the middle of described mouthful of mould 2 right-hand members is the concave spherical surface I 12 of indent; In the middle of the left end of described adjustment seat 3 is the protruding sphere II 13 of evagination; Described concave spherical surface I 12 and protruding sphere II13 are close to mutually.Described mouthful mould 2 right-hand members other end face parts except that concave spherical surface I 12 are the inclined-plane that is tilted to the left, promptly mouth mould 2 right-hand members except that concave spherical surface I 12 other end face parts and the angle of die head axial line spend greater than 90.Described concave spherical surface I12 and protruding sphere II 13 all are smooth.The outer surface of body 5 is provided with heating collar 14 behind described mouthful mould 2, the right-hand member of adjusting body 4 behind seat 3, the core rod and the external mold.
Fig. 4 is that extrusion die is not adjusted preceding A to structural representation among Fig. 2, we can find from Fig. 4, the cross section of the material channel outlet section 6 between described core 1 outer wall and mouthful mould 2 inwalls is toroidals, the top of this toroidal shown in Fig. 3 is less, the bottom is bigger, this, core 1 outer wall was that top is less with gap between mouthful mould 2 inwalls explanation this moment, and the bottom is bigger, so the wall thickness of the tubing that comes out from extrusion die is uneven.
For the upper and lower that makes gap shown among Fig. 4 reaches equally size, we can be evenly distributed on adjustment screw 9 on mouthful mould 2 by adjustment, thereby the concave spherical surface I 12 that makes mouthful mould 2 forms the rotation of certain angle along protruding sphere II 13, when the adjustment screw 9 of rotating die 2 tops moves right, the gap that will make these adjustment screw 9 directions is that the upper gap between core 1 outer wall and mouthful mould 2 inwalls becomes big, thereby this tube wall thickness is thickened; Simultaneously, the adjustment screw 9 of rotating die 2 belows is moved to the left, this moment this adjustments screw 9 directions the gap be core 1 outer wall with mouth mould 2 inwalls between the underclearance change greatly, thereby make this tube wall thickness attenuation, thereby finished the adjustment of a wall thickness.By carry out the adjustment of other direction several times with upper type, can make the tube wall thickness adjustment even, realize producing the purpose of the uniform plastic pipe of wall thickness.At this moment, as shown in Figure 3, we can be clearly seen that, size is consistent everywhere up and down for the annulus that the cross section of the material channel outlet section 6 between core 1 outer wall and mouthful mould 2 inwalls shows.Illustrating that this moment, core 1 outer wall was uniform with gap between mouthful mould 2 inwalls, is the state of ordinary production in the tubing extrusion, can produce even, the qualified plastic pipe of wall thickness.
Claims (1)
1. extrusion mould head for plastic tube, body (5) and quantity are the adjustment screw (9) of four multiple behind the external mold that it comprises core (1), its left side mouth mould (2) concordant with the left side of core (1), adjust body (4) behind seat (3), the core rod, the right-hand member of body (4) is fixed behind its right-hand member and the core rod; The right-hand member of described core (1) is fixed on behind the core rod on the body (4) by core seat (8), it is characterized in that: described mouthful of mould (2) by the adjustment screw (9) that not only plays the effect of fixing port mould but also play the adjusting play effect with adjust (3) and be connected; Described adjustment screw (9) is evenly distributed on that a mouthful mould (2) is gone up and adjusts the axis of screw (9) parallel with the die head axis; The centre of described mouthful of mould (2) right-hand member circle is the concave spherical surface I (12) of indent; The described centre of adjusting the left end circle of seat (3) is the protruding sphere II (13) of evagination; Described concave spherical surface I (12) and protruding sphere II (13) are close to mutually; Described concave spherical surface I (12) and protruding sphere II (13) all are smooth; Described mouthful of mould (2) right-hand member other end face parts except that concave spherical surface I (12) are the inclined-plane that is tilted to the left.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100628195A CN101314254B (en) | 2008-06-27 | 2008-06-27 | Extrusion mould head for plastic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100628195A CN101314254B (en) | 2008-06-27 | 2008-06-27 | Extrusion mould head for plastic tube |
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| Publication Number | Publication Date |
|---|---|
| CN101314254A CN101314254A (en) | 2008-12-03 |
| CN101314254B true CN101314254B (en) | 2010-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100628195A Active CN101314254B (en) | 2008-06-27 | 2008-06-27 | Extrusion mould head for plastic tube |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102275288A (en) * | 2011-08-03 | 2011-12-14 | 句容市后白镇民生塑胶厂 | Mould for producing plastic pipe |
| CN102700068A (en) * | 2012-05-29 | 2012-10-03 | 苏州市欣龙塑胶模具有限公司 | Single-layer spiral plastic mould |
| CN104494100B (en) * | 2014-11-05 | 2017-02-15 | 深圳市沃尔核材股份有限公司 | Extruder head |
| CN108790101A (en) * | 2018-08-08 | 2018-11-13 | 新疆登煌管业有限公司 | A kind of mouth mold and core model slack adjuster and method |
| CN111113846B (en) * | 2019-12-31 | 2022-01-07 | 潍坊现代塑胶有限公司 | Plastic pipe and manufacturing device and method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3302240A (en) * | 1963-08-27 | 1967-02-07 | Kalle Ag | Annular nozzles for the extrusion of thermoplastic materials |
| US4464104A (en) * | 1981-09-26 | 1984-08-07 | Detlef Gneuss | Adjustable ring nozzle for extruding synthetic-resin tubing |
| CN2104745U (en) * | 1991-11-13 | 1992-05-20 | 沈阳市塑料板材厂 | Machine head of one-step polyurethane insulating pipe production line |
| CN1196011A (en) * | 1995-09-12 | 1998-10-14 | 尤玻诺尔公司 | Apparatus and method for adjusting mandrel and kernel while producing plastic pipe |
| CN201235599Y (en) * | 2008-06-27 | 2009-05-13 | 宁波方力集团有限公司 | Extrusion mould head for plastic tube |
-
2008
- 2008-06-27 CN CN2008100628195A patent/CN101314254B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3302240A (en) * | 1963-08-27 | 1967-02-07 | Kalle Ag | Annular nozzles for the extrusion of thermoplastic materials |
| US4464104A (en) * | 1981-09-26 | 1984-08-07 | Detlef Gneuss | Adjustable ring nozzle for extruding synthetic-resin tubing |
| CN2104745U (en) * | 1991-11-13 | 1992-05-20 | 沈阳市塑料板材厂 | Machine head of one-step polyurethane insulating pipe production line |
| CN1196011A (en) * | 1995-09-12 | 1998-10-14 | 尤玻诺尔公司 | Apparatus and method for adjusting mandrel and kernel while producing plastic pipe |
| CN201235599Y (en) * | 2008-06-27 | 2009-05-13 | 宁波方力集团有限公司 | Extrusion mould head for plastic tube |
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| CN101314254A (en) | 2008-12-03 |
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Assignee: NINGBO GRAEWE FANGLI EXTRUDING EQUIPMENT CO., LTD. Assignor: Ningbo Fangli Group Co., Ltd. Contract record no.: 2011330001073 Denomination of invention: Extrusion mould head for plastic tube Granted publication date: 20100623 License type: Exclusive License Open date: 20081203 Record date: 20110817 |