CN203198219U - Composite die used for external anti-corrosion coating of steel pipe - Google Patents
Composite die used for external anti-corrosion coating of steel pipe Download PDFInfo
- Publication number
- CN203198219U CN203198219U CN2013201887831U CN201320188783U CN203198219U CN 203198219 U CN203198219 U CN 203198219U CN 2013201887831 U CN2013201887831 U CN 2013201887831U CN 201320188783 U CN201320188783 U CN 201320188783U CN 203198219 U CN203198219 U CN 203198219U
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- die
- polyethylene
- adhesive
- mold
- annular
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The utility model relates to a composite die used for an external anti-corrosion coating of a steel pipe. The composite die comprises a die body. The composite die is characterized in that the die body is composed of an external die, a die core and an internal die which are sleeved sequentially from outside to inside; an adhesive melt inlet and a polyethylene melt inlet are formed in the external die; the lower surface of the external die and the upper surface in the middle of the die core are convoluted to form an annular adhesive runner communicated with the adhesive melt inlet and an annular polyethylene runner communicated with the polyethylene melt inlet; an annular polyethylene die cavity communicated with the annular polyethylene runner is formed on the upper surface in the front of the die core; an annular adhesive die cavity communicated with the annular adhesive runner is formed on the lower surface of the die core; the two die cavities are intersected at a front port die. According to the composite die, two original dies are combined into one, and two annular die cavities and two annular runners are arranged in the die body. The composite die is simple in structure, reasonable in design, convenient to operate, uniform in material flow and convenient to adjust.
Description
Technical field
The utility model relates to a kind of mould, especially a kind of composite die for the preventing external corrosion of steel pipe coating.
Background technology
Steel pipe 3PE extruding polyethylene coating is divided into three-decker.The bottom that contacts with steel pipe is epoxide powder coating; The intermediate layer is adhesive (is called for short AD glue), is used for bonding between epoxide powder coating and the polyethylene; Skin is polyethylene (being called for short PE glue).Traditional handicraft is first epoxy powder to be sprayed into the steel tube surface that is heated to uniform temperature, then the AD glue-line to be coated to the epoxy layer outside, protective layer used another extruder of PE to be coated to the outside of AD glue-line by another ring mould again by a ring mould with extruder, and the AD glue-line is bonded together epoxy layer and PE protective layer.
Because the wrap coating mode is more suitable for the preventing external corrosion of steel pipe of Large Diameter Pipeline, so when the steel pipe for pipe with small pipe diameter (refer generally to Φ 20-Φ 305mm, maximum can be processed steel pipe diameter of phi 630mm at present) carries out outer corrosion prevention operation, be more suitable for adopting the coating application pattern.What clad type steel pipe corrosion-proof production line adopted at present is that two extruders is placed on respectively on the ground of steel pipe drive line side mostly, connects respectively a ring mould, and two moulds need to adjust respectively, and it is very inconvenient to use.
Mould is the critical component that determines the outer anticorrosive quality of steel pipe 3PE clad type, how to accomplish easy to use, material stream evenly, adjustable at any time, be the key of Design of Dies success or failure.
Summary of the invention
Technical problem to be solved in the utility model is that a kind of composite die that is used for the preventing external corrosion of steel pipe coating simple in structure, reasonable in design is provided for the above-mentioned state of the art, replace two original ring moulds by composite die, have characteristics easy to operate, that material flows evenly, is convenient to regulate.
The utility model solves the problems of the technologies described above the technical scheme that adopts: a kind of composite die for the preventing external corrosion of steel pipe coating, comprise mold, it is characterized in that: described mold is by sheathed external mold successively from outside to inside, core rod and internal mold form, external mold is provided with adhesive melt inlet and polyethylene melt import, the middle part upper surface of the lower surface of external mold and core rod is combined to form the adhesive annular channel that communicates with the adhesive melt inlet, and the polyethylene annular channel that communicates with the polyethylene melt import, and be formed with the polyethylene annular die cavity that communicates with the polyethylene annular channel in the front upper surface of core rod, lower surface at core rod is formed with the adhesive annular die cavity that communicates with the adhesive annular channel, and two die cavitys cross at the front port mould place of mold.
As improvement, be connected by a plurality of linked holes between described adhesive annular channel and the adhesive annular die cavity, and be equipped with an adhesive adjusting bolt that is used for regulating material stream at each linked hole; Same, be connected by a plurality of through holes between described polyethylene annular channel and the polyethylene annular die cavity, and be provided with one at each through hole and regulate the polyethylene adjusting bolt that material flows.
As improvement, the front end of described mold is provided with forward flange, the rear end of mold is provided with rear flange, forward flange is fixed on the described external mold by hold-down screw, the inner end indent of forward flange matches with the front upper surface of described core rod and forms the polyethylene annular die cavity, outer section of the described through hole screwed hole for matching with the polyethylene adjusting bolt, described through hole hoop run through be opened on the forward flange, corresponding with the outlet of described polyethylene annular channel; Described rear flange is fixed on the rear end of described external mold and internal mold by hold-down screw, outer section of the described linked hole screwed hole for matching with the adhesive adjusting bolt, described linked hole hoop run through be opened on the rear flange, corresponding with the outlet of described adhesive annular channel.
Improve, hoop is provided with a circle heating rod on the internal face of described internal mold again.
At last, the front port mould place of described die body is provided with for the tuningout flange of regulating material stream.
Compared with prior art, the utility model has the advantage of: two original moulds are combined into one, in mold, be provided with two annular die cavities and annular channel, so that extruder adhesive melt and polyethylene melt out can carry out corresponding die cavity from each self-corresponding runner respectively, and be to adopt porous UNICOM, melt is just very even like this, just adjusts easily; Go out to arrange the tuningout flange at final mouth mould simultaneously, so that material stream evenly.The utility model is simple in structure, reasonable in design, has characteristics easy to operate, that material flows evenly, is convenient to regulate.
Description of drawings
Fig. 1 is structure cutaway view of the present utility model;
Fig. 2 is the left view of Fig. 1.
The specific embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
As shown in the figure, a kind of composite die for the preventing external corrosion of steel pipe coating, comprise mold, mold is by sheathed external mold 1 successively from outside to inside, core rod 2 and internal mold 3 form, the periphery of die body 1 is provided with the AD(adhesive that is connected with the melt flow channel of AD extruder and is called for short) melt inlet 11, the PE(polyethylene that is connected with the melt flow channel of PE extruder is called for short) melt inlet 12, the middle part upper surface of the lower surface of external mold 1 and core rod 2 is combined to form the AD annular channel 13 that communicates with AD melt inlet 11, and the PE annular channel 14 that communicates with PE melt inlet 12, and be formed with the PE annular die cavity 16 that communicates with PE annular channel 14 in the front upper surface of core rod 2, being formed with 15, two die cavitys of AD annular die cavity that communicate with AD annular channel 13 at the lower surface of core rod 2 crosses at the front port mould place of mold; The front end of mold is provided with forward flange 4, the rear end of mold is provided with rear flange 5, forward flange 4 is fixedly connected with external mold 1 by hold-down screw 10, the inner end indent of forward flange 4 matches with the front upper surface of core rod 2 and forms PE annular die cavity 16, annular running through offers the corresponding through hole of a plurality of outlets with PE annular channel 14 on forward flange 4, be connected by these through holes that are arranged circumferentially between PE annular channel 14 and the PE annular die cavity 16, and be provided with a PE adjusting bolt 8 of regulating material stream at each through hole; Rear flange 5 is fixed on the rear end face of external mold 1 and internal mold 3 by hold-down screw 10, annular running through offers a plurality of linked holes corresponding with the outlet of AD annular channel 13 on rear flange 5, be connected by these linked holes that are arranged circumferentially between AD annular channel 13 and the AD annular die cavity 15, and be provided with an AD adjusting bolt 7 of regulating material stream at each linked hole, like this so that melt is more even at the melt pressure in each orientation of circumference, each orientation material Flow Velocity of on-line control circumference becomes a reality; Concrete inner because vacuumizing the thermal loss that causes for compensation film, hoop is provided with a circle heating rod 9 on the internal face of internal mold 3; And set up again a tuningout flange 6 at the mouth mould place that two stock material streams unite two into one later and circumferentially expect to flow the uniformity in order to final adjusting.
Like this, enter the AD annular channel of mold from AD melt inlet 11 from the AD melt out of AD extruder, adjusting by AD adjusting bolt 7 enters AD annular die cavity 15, meanwhile, enter the PE annular channel 14 of mold from PE melt inlet 12 from the PE melt out of PE extruder, adjusting by PE adjusting bolt 8 enters PE annular die cavity 16, finally meet at together the AD melt at lower floor, PE melt on the upper strata, flow out from the mouth mould steel pipe coated.
Claims (5)
1. one kind is used for the composite die that preventing external corrosion of steel pipe coats, comprise mold, it is characterized in that: described mold is by sheathed external mold successively from outside to inside, core rod and internal mold form, external mold is provided with adhesive melt inlet and polyethylene melt import, the middle part upper surface of the lower surface of external mold and core rod is combined to form the adhesive annular channel that communicates with the adhesive melt inlet, and the polyethylene annular channel that communicates with the polyethylene melt import, and form the polyethylene annular die cavity that communicates with the polyethylene annular channel in the front upper surface of core rod, lower surface at core rod forms the adhesive annular die cavity that communicates with the adhesive annular channel, and two die cavitys cross at the front port mould place of mold.
2. composite die according to claim 1 is characterized in that being connected by a plurality of linked holes between described adhesive annular channel and the adhesive annular die cavity, and is equipped with an adhesive adjusting bolt that is used for regulating material stream at each linked hole; Same, be connected by a plurality of through holes between described polyethylene annular channel and the polyethylene annular die cavity, and be provided with one at each through hole and regulate the polyethylene adjusting bolt that material flows.
3. composite die according to claim 2, the front end that it is characterized in that described mold is provided with forward flange, the rear end of described mold is provided with rear flange, forward flange is fixed on the described external mold by hold-down screw, the inner end indent of forward flange matches with the front upper surface of described core rod and forms the polyethylene annular die cavity, outer section of the described through hole screwed hole for matching with the polyethylene adjusting bolt, described through hole hoop run through be opened on the forward flange, corresponding with the outlet of described polyethylene annular channel; Described rear flange is fixed on the rear end of described external mold and internal mold by hold-down screw, outer section of the described linked hole screwed hole for matching with the adhesive adjusting bolt, described linked hole hoop run through be opened on the rear flange, corresponding with the outlet of described adhesive annular channel.
4. composite die according to claim 1 is characterized in that hoop is provided with a circle heating rod on the internal face of described internal mold.
5. composite die according to claim 1 is characterized in that the front port mould place of described die body is provided with for the tuningout flange of regulating material stream.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201887831U CN203198219U (en) | 2013-04-15 | 2013-04-15 | Composite die used for external anti-corrosion coating of steel pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201887831U CN203198219U (en) | 2013-04-15 | 2013-04-15 | Composite die used for external anti-corrosion coating of steel pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203198219U true CN203198219U (en) | 2013-09-18 |
Family
ID=49142358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201887831U Expired - Lifetime CN203198219U (en) | 2013-04-15 | 2013-04-15 | Composite die used for external anti-corrosion coating of steel pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203198219U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110936577A (en) * | 2019-11-28 | 2020-03-31 | 衡阳科盈钢管有限公司 | Anticorrosive steel pipe mould |
| CN112519173A (en) * | 2020-11-17 | 2021-03-19 | 四川庆达实业集团有限公司 | Hot bending bend cladding formula 3LPE coating equipment |
-
2013
- 2013-04-15 CN CN2013201887831U patent/CN203198219U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110936577A (en) * | 2019-11-28 | 2020-03-31 | 衡阳科盈钢管有限公司 | Anticorrosive steel pipe mould |
| CN112519173A (en) * | 2020-11-17 | 2021-03-19 | 四川庆达实业集团有限公司 | Hot bending bend cladding formula 3LPE coating equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130918 |