CN109130130B - Composite pipe protective layer coating die - Google Patents
Composite pipe protective layer coating die Download PDFInfo
- Publication number
- CN109130130B CN109130130B CN201811307313.6A CN201811307313A CN109130130B CN 109130130 B CN109130130 B CN 109130130B CN 201811307313 A CN201811307313 A CN 201811307313A CN 109130130 B CN109130130 B CN 109130130B
- Authority
- CN
- China
- Prior art keywords
- hole
- protective layer
- layer coating
- inflow
- die body
- 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.)
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Links
- 239000011248 coating agent Substances 0.000 title claims abstract description 16
- 238000000576 coating method Methods 0.000 title claims abstract description 16
- 239000011241 protective layer Substances 0.000 title claims abstract description 12
- 239000002131 composite material Substances 0.000 title claims description 12
- 239000002184 metal Substances 0.000 claims abstract description 30
- 230000001154 acute effect Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 150000001875 compounds Chemical class 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 description 20
- 239000010410 layer Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000007790 scraping Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Classifications
-
- 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
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model provides a compound pipe protective layer coating mould, relates to pipeline production facility technical field, includes the die body, the die body includes the through-hole that runs through, the through-hole is used for supplying the metal pipe to pass, the die body side has into the discharge orifice, the discharge orifice run through in the through-hole side has the annular in the through-hole, the annular passes into the discharge orifice with the through-hole is crossed the department. By means of the die, the firm outer plastic pipe can be formed on the outer side of the metal pipe in a light, thin and uniform mode.
Description
Technical Field
The invention relates to the technical field of pipeline production equipment, in particular to a composite pipe protective layer coating die.
Background
A composite pipe is a pipe that has the advantages of both metal and plastic pipes through the superposition of both. In the production process of the general existing composite pipe, a lap joint method production process is mostly adopted, namely, a metal pipe is firstly manufactured, and then a plastic pipe with inner and outer layers is manufactured on the formed metal pipe. Wherein, the outer plastic pipe has the function of protecting the inner metal pipe from abrasion and simultaneously isolating oxygen for the metal pipe from corrosion. The plastic pipe of the outer layer has the problem of infirm connection due to the longer metal pipe and poorer connection effect between metal and plastic, and the problem of uneven forming thickness is also existed by coating the plastic layer, so that a production mould which can effectively wrap the plastic layer outside the metal pipe is needed to realize uniform and firm outer plastic pipe forming.
Disclosure of Invention
The invention aims to provide a composite pipe protective layer coating die, by which a firm outer plastic pipe can be formed outside a metal pipe in a light, thin and uniform manner.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
the utility model provides a compound pipe protective layer coating mould, includes the die body, the die body includes the through-hole that runs through, the through-hole is used for supplying the metal pipe to pass, the die body side has into the flow hole, the inflow hole run through in the through-hole side has the annular in the through-hole, the annular passes into the flow hole with the through-hole is crossed the department.
Preferably, the axis of the inflow hole and the axis of the through hole form an acute angle pointing to the front end of the die.
Preferably, the acute angle is equal to or less than 45 degrees.
Preferably, the inflow opening has two mirror images of each other along a vertical plane in which the through-opening axis lies.
Preferably, a shielding ridge which is gradually reduced inwards from the wall surface of the through hole is arranged at the opening of the through hole penetrating through the front end of the die body.
Preferably, the connection surface of the shielding ridge and the inner wall of the through hole is arc-shaped.
Preferably, a deflector is arranged in the ring groove, and the deflector forms an included angle which is non-orthogonal with the axis of the through hole.
Preferably, the inflow opening edge has a connecting portion extending outwardly from the mold body.
Preferably, the connecting portion has therein a connecting hole having a flared cross section which is flared outwardly from the inflow hole.
The invention has the beneficial effects that:
1. the plastic raw material passing through the inflow hole forms a raw material flow surrounding the periphery of the metal pipe under the flow guide of the annular groove, and can be adhered to the metal pipe to form an outer plastic pipe by matching with the forward movement of the metal pipe, so that the forming mode is simple, the forming effect is good, and the thickness uniformity of the outer plastic pipe is good due to the circumferential simultaneous coating;
2. the acute angle between the inflow hole and the through hole enables the inflow direction to only want the forward conveying direction of the metal pipe, so that the attaching effect is improved, and the problems of backward backflow and the like are avoided;
3. the symmetrical matching injection of the two inflow holes ensures that the plastic raw materials form circumferential surrounding at a higher speed and with larger feeding amount, thereby avoiding the generation of uncovered parts and improving the molding quality and the distribution uniformity;
4. the shielding ridge can prevent the excessive plastic raw materials from flowing out, the wall thickness of the outer plastic pipe can be reduced through a gradually-reduced structure to reduce the weight, and the gradually-reduced output can improve the local coating pressure to improve the adhesive force;
5. the generation of weld marks can be avoided through the guide plate, and the integrity and the structural strength of the outer plastic pipe are improved.
Drawings
FIG. 1 is a schematic horizontal cross-section of the present invention;
FIG. 2 is a schematic vertical cross-section of the present invention;
FIG. 3 is a schematic cross-sectional view of the present invention along the axis of an inlet orifice;
the drawings are respectively as follows: the device comprises a die body 1, a through hole 2, a flow inlet hole 3, a ring groove 4, a flow guide plate 41, a shielding ridge 5, a connecting part 6 and a connecting hole 61.
Detailed Description
The invention is described in detail below with reference to the attached drawing figures:
the composite pipe protective layer coating die shown in fig. 1 and 2 comprises a cylindrical steel die body 1, wherein a through hole 2 is concentrically machined in the die body 1, the through hole 2 is used for conveying a metal pipe from back to front in the die body 1 through an external supporting piece and the like when the metal pipe passes through the metal pipe, and the supporting piece limits the metal pipe to be coaxial with the through hole 2. The side of the die body 1 is machined with an inflow hole 3, the inflow hole 3 penetrates through the side of the through hole 2 from outside to inside, the through hole 2 is internally machined with a ring groove 4, and the ring groove 4 penetrates through the position where the inflow hole 3 and the through hole 2 penetrate.
During production, the metal pipe passes through the through hole 2 and is conveyed forward, meanwhile, molten plastic raw materials are poured into the inflow hole 3 through the double-screw extruder, the plastic raw materials enter the die body along the inflow hole 3 and flow along the annular groove 4 to form a surrounding feeding state around the metal pipe, and at the moment, the outer wall of the metal pipe is driven to move forward by friction action to wrap the flowing plastic raw materials on the outer side of the metal pipe to form an outer plastic pipe.
In this embodiment, the axis of the inflow hole 3 and the axis of the through hole 2 form an acute angle directed toward the front end of the mold. Wherein the acute angle is less than or equal to 45 degrees. Because the double-screw extruder has larger extrusion pressure on the plastic raw material, the plastic raw material is guided into the feeding raw material through an acute angle, so that the entering direction of the plastic raw material from back to front is formed to match with the advancing of the metal pipe to form a package, and the non-uniformity of the package caused by backward infiltration is avoided.
In this embodiment, the inflow orifice 3 has two mirror symmetry along the vertical plane in which the axis of the through-hole 2 is located, and at the same time, the twin-screw extruder has two symmetry. The molten plastic raw materials are injected at two sides simultaneously, so that the metal pipe can be wrapped only by flowing for half a cycle along the annular groove 4, and the coating efficiency and the production efficiency are improved.
In this embodiment, a shielding ridge 5 which is gradually smaller from the wall surface of the through hole 2 is provided at the opening of the through hole 2 penetrating the front end of the die body 1. The connection surface of the shielding ridge 5 and the inner wall of the through hole 2 is arc-shaped. The arrangement of the shielding ridge 5 enables the diameter of an opening through which the metal pipe passes when the front end of the die body 1 leaves the die body 1 to be smaller than the inner diameter of the through hole 2, namely, the effect of scraping the molten unconsolidated plastic layer on the surface of the metal pipe is achieved, and the effect enables the surface quality of the outer plastic pipe after scraping the uniform part to be better, and the thickness uniformity to be better. Meanwhile, the smaller opening enables more plastic raw materials to accumulate to form larger pressure at the position, so that the adhesive force of the plastic layer on the metal pipe is improved. Meanwhile, the arc-shaped connecting surface can effectively guide and shield the plastic raw materials, prevent turbulence and the like generated by blocking the molten plastic raw materials at the position from affecting adhesion, and reduce overflow of the plastic raw materials from the opening.
In this embodiment, the ring groove 4 has a baffle 41, and the baffle 41 has a non-orthogonal included angle with the axis of the through hole 2. Under the guiding action of the guide plates 41, molten plastic raw materials entering the inflow holes 3 at two sides are guided to form oblique cross flow instead of opposite convection, so that the size of a contact surface between two plastic raw materials can be effectively reduced, namely the problem of incomplete mixing between the two contact surfaces is reduced, the generation of weld marks is further reduced, the integrity of an outer plastic pipe is improved, and the distribution uniformity of the outer plastic pipe is improved.
In this embodiment, as shown in fig. 3, the edge of the inflow hole 3 has a connecting portion 6 extending outwardly from the mold body 1. The connecting portion 6 has therein a connecting hole 61 having a flared cross section which is flared outwardly from the inflow hole 3. Thereby being convenient for connecting the die orifice of the double screw extruder for outputting the plastic raw material, optimizing the guiding function of the plastic raw material and preventing overflow or leakage.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention fall within the scope of the present invention, and the technical content claimed by the present invention is fully described in the claims.
Claims (5)
1. The composite pipe protective layer coating die is characterized by comprising a die body (1), wherein the die body (1) comprises a through hole (2) which penetrates through, the through hole (2) is used for a metal pipe to penetrate through, an inflow hole (3) is formed in the side surface of the die body (1), the inflow hole (3) penetrates through the side surface of the through hole (2), an annular groove (4) is formed in the through hole (2), and the annular groove (4) penetrates through the position where the inflow hole (3) and the through hole (2) penetrate through; the axis of the inflow hole (3) and the axis of the through hole (2) form an acute angle pointing to the front end of the die; a shielding ridge (5) which is gradually reduced inwards from the wall surface of the through hole (2) is arranged at the opening of the through hole (2) penetrating through the front end of the die body (1); the connection surface of the shielding ridge (5) and the inner wall of the through hole (2) is arc-shaped;
a deflector (41) is arranged in the ring groove (4), and the deflector (41) forms a non-orthogonal included angle with the axis of the through hole (2).
2. A composite pipe protective layer coating die as in claim 1, wherein the acute angle is 45 °.
3. A composite pipe protective layer coating die according to claim 1, characterized in that the inflow orifice (3) has two mirror symmetry along a vertical plane in which the axis of the through orifice (2) lies.
4. A composite pipe protective layer coating die according to claim 1, characterized in that the inflow opening (3) edge has a connection (6) extending outwards from the die body (1).
5. A composite pipe protective layer coating die according to claim 4, characterized in that the connecting portion (6) has therein a connecting hole (61) having a horn-shaped cross section which is flared outwardly from the inflow hole (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307313.6A CN109130130B (en) | 2018-11-05 | 2018-11-05 | Composite pipe protective layer coating die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811307313.6A CN109130130B (en) | 2018-11-05 | 2018-11-05 | Composite pipe protective layer coating die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109130130A CN109130130A (en) | 2019-01-04 |
| CN109130130B true CN109130130B (en) | 2023-12-15 |
Family
ID=64807793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811307313.6A Active CN109130130B (en) | 2018-11-05 | 2018-11-05 | Composite pipe protective layer coating die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109130130B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1267801A (en) * | 2000-04-13 | 2000-09-27 | 陈仁慈 | Metal pipe with heat-insulating foamed plastic coating and its manufacture |
| CN1367075A (en) * | 2002-02-05 | 2002-09-04 | 揭东经济开发试验区泰丰侨金属制品有限公司 | Production method of steel-plastics composite pipe whose exterior is galvanized and interior is lined with polyethylene |
| CN1537713A (en) * | 2003-04-18 | 2004-10-20 | 周萍萍 | Manufacturing method of heat insulating metal pipe loved with micro foamed plastic layer |
| CN2855719Y (en) * | 2005-11-10 | 2007-01-10 | 甘国工 | Equipment for producing composite pipe by combining butt welding metal pipe with polymers |
| CN101077613A (en) * | 2007-06-25 | 2007-11-28 | 李富春 | Method for producing steel mesh reinforced plastic composite pipes and its self-contained equipment |
| CN203863915U (en) * | 2014-03-13 | 2014-10-08 | 绍兴宏润消防器材有限公司 | Plastic coating machine head for hose |
| CN105619677A (en) * | 2016-03-09 | 2016-06-01 | 刘昌林 | Molding equipment and molding method for steel-plastic composite pipe |
| CN106738757A (en) * | 2016-12-31 | 2017-05-31 | 剑河县连光复合塑料水管有限公司 | Double-layer composite pipe extruded mould improved structure |
| CN207256825U (en) * | 2017-09-28 | 2018-04-20 | 广东威利坚机械集团有限公司 | A kind of runner assembly for coating extrusion die and cladding extrusion die |
| CN209007933U (en) * | 2018-11-05 | 2019-06-21 | 福建亚通新材料科技股份有限公司 | A kind of multiple tube protective layer coating die |
-
2018
- 2018-11-05 CN CN201811307313.6A patent/CN109130130B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1267801A (en) * | 2000-04-13 | 2000-09-27 | 陈仁慈 | Metal pipe with heat-insulating foamed plastic coating and its manufacture |
| CN1367075A (en) * | 2002-02-05 | 2002-09-04 | 揭东经济开发试验区泰丰侨金属制品有限公司 | Production method of steel-plastics composite pipe whose exterior is galvanized and interior is lined with polyethylene |
| CN1537713A (en) * | 2003-04-18 | 2004-10-20 | 周萍萍 | Manufacturing method of heat insulating metal pipe loved with micro foamed plastic layer |
| CN2855719Y (en) * | 2005-11-10 | 2007-01-10 | 甘国工 | Equipment for producing composite pipe by combining butt welding metal pipe with polymers |
| CN101077613A (en) * | 2007-06-25 | 2007-11-28 | 李富春 | Method for producing steel mesh reinforced plastic composite pipes and its self-contained equipment |
| CN203863915U (en) * | 2014-03-13 | 2014-10-08 | 绍兴宏润消防器材有限公司 | Plastic coating machine head for hose |
| CN105619677A (en) * | 2016-03-09 | 2016-06-01 | 刘昌林 | Molding equipment and molding method for steel-plastic composite pipe |
| CN106738757A (en) * | 2016-12-31 | 2017-05-31 | 剑河县连光复合塑料水管有限公司 | Double-layer composite pipe extruded mould improved structure |
| CN207256825U (en) * | 2017-09-28 | 2018-04-20 | 广东威利坚机械集团有限公司 | A kind of runner assembly for coating extrusion die and cladding extrusion die |
| CN209007933U (en) * | 2018-11-05 | 2019-06-21 | 福建亚通新材料科技股份有限公司 | A kind of multiple tube protective layer coating die |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109130130A (en) | 2019-01-04 |
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