CN118219528A - Double-layer pipe co-extrusion die and pipe molding manufacturing method - Google Patents
Double-layer pipe co-extrusion die and pipe molding manufacturing method Download PDFInfo
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- CN118219528A CN118219528A CN202410642413.3A CN202410642413A CN118219528A CN 118219528 A CN118219528 A CN 118219528A CN 202410642413 A CN202410642413 A CN 202410642413A CN 118219528 A CN118219528 A CN 118219528A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 47
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 11
- 238000000465 moulding Methods 0.000 title claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 41
- 230000007704 transition Effects 0.000 claims abstract description 20
- 238000009826 distribution Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000007723 die pressing method Methods 0.000 claims description 5
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 238000007493 shaping process Methods 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
- B29C48/337—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location
- B29C48/338—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles the components merging at a common location using a die with concentric parts, e.g. rings, cylinders
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0023—Combinations of extrusion moulding with other shaping operations combined with printing or marking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/695—Flow dividers, e.g. breaker plates
- B29C48/70—Flow dividers, e.g. breaker plates comprising means for dividing, distributing and recombining melt flows
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of pipe production, and aims to solve the problems that the inner layer and the outer layer of the existing double-layer pipe are easy to separate from each other, the existing double-layer co-extrusion die cannot extrude the pipe with stronger bonding force and the inner layer and the outer layer are difficult to separate from each other, and provide a double-layer pipe co-extrusion die and a pipe molding manufacturing method; the double-layer pipe co-extrusion die comprises a transition sleeve, a splitter plate, a double-layer pipe occlusion interlocking die, a shrinkage sleeve, a neck die and a die core; the pipe molding manufacturing method comprises the following steps: s1: connecting a double-layer pipe coextrusion die with an extruder host; s2: respectively introducing an inner layer pipe raw material and an outer layer pipe raw material of the double-layer pipe into a double-layer pipe co-extrusion die to form an inner layer pipe and an outer layer pipe of the double-layer pipe; s3: forming a double-layer pipe finished product; the invention can extrude the inner layer and the outer layer of the double-layer pipe simultaneously, lock the inner layer and the outer layer mutually, and increase the bonding area of the inner layer and the outer layer so as to ensure the bonding force of the inner layer and the outer layer of the pipe and prevent the inner layer and the outer layer of the pipe from being separated after long-time use.
Description
Technical Field
The invention relates to the technical field of pipe production, in particular to a double-layer pipe co-extrusion die and a pipe molding manufacturing method.
Background
The double-layer pipe has the advantages of corrosion resistance, high temperature resistance, compression resistance and the like, and is widely applied to the aspects of building drainage pipelines, wire sheaths, agricultural irrigation and the like.
In the prior art, a double-layer pipe is extruded through a double-layer co-extrusion extruder, the double-layer co-extrusion extruder consists of an extruder host, conveying equipment, a die head, a cooling water tank, a cutting device, an automatic control system and the like, and the whole equipment can synchronously extrude two different materials. Because the existing double-layer pipe is generally formed by directly combining the inner layer and the outer layer, when the existing double-layer co-extrusion extruder extrudes the pipe, two materials are pressed through a die and finally formed.
In the prior art, the inner layer and the outer layer of the double-layer pipe are directly combined through the curved surface by using the extruder, the combination mode is unreliable, the inner layer and the outer layer are easy to separate from each other, and the existing double-layer co-extrusion extruder can only produce the double-layer pipe and can not produce the pipe with stronger binding force and difficult separation of the inner layer and the outer layer.
Disclosure of Invention
The invention aims to provide a double-layer pipe co-extrusion die and a pipe molding manufacturing method, which are used for solving the problems that the inner layer and the outer layer of the existing double-layer pipe are easy to separate from each other, the existing double-layer co-extrusion die cannot extrude the pipe with stronger binding force and the inner layer and the outer layer are difficult to separate from each other.
The invention is realized by adopting the following technical scheme:
The invention provides a double-layer pipe co-extrusion die which comprises a transition sleeve, a splitter plate, a double-layer pipe occlusion interlocking die, a shrinkage sleeve, a neck die and a die core;
The transition sleeve is used for being connected with the extruder host, a first feeding hole is formed in the transition sleeve, and the first feeding hole is used for introducing raw materials of the inner layer pipe; the flow dividing plate is connected with the transition sleeve, a flow dividing channel is arranged on the flow dividing plate, and the flow dividing channel is communicated with the first feeding hole; the double-layer pipe occlusion interlocking die comprises a connecting ring plate and a guide cylinder connected to one side of the connecting ring plate, wherein the connecting ring plate is connected with the flow dividing plate, the guide cylinder is of a hollow structure, and the inside of the guide cylinder is communicated with the flow dividing channel; the die core is used for being connected with the flow distribution plate, the die core is positioned in the guide cylinder, an inner-layer pipe raw material extrusion channel is formed between the die core and the inside of the guide cylinder, and the inner-layer pipe raw material extrusion channel is communicated with the flow distribution channel; the shrink sleeve is connected with the connecting ring plate and sleeved outside the guide cylinder, and a second feeding port is arranged on the shrink sleeve and used for introducing raw materials of the outer layer pipe; the mouth die is connected to the shrink sleeve and sleeved outside the guide cylinder, and an outer layer pipe raw material extrusion channel is formed between the mouth die and the outside of the guide cylinder;
the guide cylinder is characterized in that a groove is formed in the outer wall surface of the guide cylinder along the length direction of the guide cylinder, the groove comprises a concave part and a locking part, the locking part is positioned below the concave part and is communicated with the concave part, the locking part is provided with a left wing part and a right wing part, and the width of the locking part is larger than that of the concave part; and a protrusion matched with the groove in shape is formed on the inner wall surface of the guide cylinder, and the protrusion corresponds to the groove in position.
As a preferable technical scheme:
The double-layer pipe co-extrusion die further comprises a fixed die core, wherein the fixed die core is connected to the flow distribution plate, the die core is connected to the fixed die core, the fixed die core and the die core are located inside the guide cylinder, and an inner-layer pipe raw material extrusion channel is formed between the fixed die core and the inside of the guide cylinder.
As a preferable technical scheme:
The fixed mold core is fixed on the flow distribution plate through a fixed mold core screw.
As a preferable technical scheme:
the mold core is fixed on the fixed mold core through a self-provided screw tooth structure.
As a preferable technical scheme:
the guide cylinder is cone-shaped, the two ends of the guide cylinder are a first end and a second end respectively, the diameter of the first end of the guide cylinder is larger than that of the second end of the guide cylinder, and the first end of the guide cylinder is connected with the connecting annular plate.
As a preferable technical scheme:
the mouth mold is provided with an inner cavity, and the shape of the inner cavity is matched with the shape of the guide cylinder.
As a preferable technical scheme:
A plurality of grooves are formed in the outer wall surface of the guide cylinder at intervals.
As a preferable technical scheme:
one end of the transition sleeve is fixed on the screw cylinder flange plate of the extruder host machine through bolts.
As a preferable technical scheme:
one end of the splitter plate is fixed on the other end of the transition sleeve through a bolt.
As a preferable technical scheme:
one side of the connecting ring plate is connected with the flow dividing plate, and one end of the shrinkage sleeve is fixedly connected with the other side of the connecting ring plate through bolts.
As a preferable technical scheme:
the die is clamped on the shrink sleeve through a die pressing plate.
As a preferable technical scheme:
and the second feeding port is provided with an extruder auxiliary machine component which is used for being fixed on an extruder auxiliary machine die head.
As a preferable technical scheme:
The extruder auxiliary machine component comprises an auxiliary machine die and an auxiliary machine die core.
The invention further provides extrusion equipment, which comprises an extruder host, wherein the extruder host is connected with the double-layer pipe coextrusion die.
The invention further provides a pipe molding manufacturing method, which comprises the following steps:
S1: connecting the double-layer pipe coextrusion die with an extruder host;
S2: introducing an inner layer pipe raw material of the double-layer pipe into a transition sleeve of a double-layer pipe co-extrusion die through an extruder host, then introducing the inner layer pipe raw material into a double-layer pipe occluding and interlocking die through a splitter plate, gradually compressing the inner layer pipe raw material in a gap between the double-layer pipe occluding and interlocking die and a fixed die core, and subsequently forming an inner layer pipe of the double-layer pipe by matching the double-layer pipe occluding and interlocking die core;
Meanwhile, the outer layer pipe raw material of the double-layer pipe passes through an extruder auxiliary machine component and then passes through a space formed between the shrink sleeve and the double-layer pipe occlusion interlocking mold, and an outer layer pipe of the double-layer pipe is formed between the inflow port mold and the double-layer pipe occlusion interlocking mold;
S3: the double-layer pipe finished product is formed by carrying out vacuum cooling shaping, and then carrying out code spraying, traction, cutting and packaging procedures.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows:
1. The invention can extrude the inner layer and the outer layer of the double-layer pipe simultaneously and lock the inner layer and the outer layer mutually, thereby ensuring the binding force of the inner layer and the outer layer of the pipe and effectively preventing the inner layer and the outer layer of the pipe from being separated after long-time use.
2. The invention can be used for the pipe with the same material or different materials as the inner layer and the outer layer, and can solve the problem of poor adhesion effect between the inner layer and the outer layer of the double-layer pipe extruded by a common die.
3. The invention can extrude the pipe with different inner and outer layers to obtain the pipe with different inner and outer layers, and can solve the problems that the similar compatibility principle of the inner and outer layers raw materials cannot be well utilized, the inner and outer layers are layered after extrusion and cooling, and the inner and outer layers of the pipe are separated, so that the bonding force between the inner and outer layers of the double-layer pipe with different inner and outer layers is improved.
Drawings
Fig. 1 is a schematic diagram of the external structure of a co-extrusion die for a double-layer pipe according to the present invention.
Fig. 2 is a right side view of a double-layer pipe coextrusion die according to the present invention.
Fig. 3 is a cross-sectional view in the direction M-M of fig. 2.
Fig. 4 is a cross-sectional view in the Q-Q direction of fig. 1.
Fig. 5 is a partial schematic view of fig. 4.
Fig. 6 is a right side view of a double-layer pipe occlusion interlocking mold according to the present invention.
Fig. 7 is a front view of a double-layer pipe occlusion interlocking mold according to the present invention.
Fig. 8 is a sectional view taken along the direction D-D in fig. 6.
Fig. 9 is a cross-sectional view taken along the direction A-A in fig. 7.
Fig. 10 is a cross-sectional view taken along the direction B-B in fig. 7.
Fig. 11 is a cross-sectional view taken along the direction C-C in fig. 7.
Icon: 1-transition sleeve, 101-first feed inlet, 2-splitter plate, 201-splitter channel, 3-double-layer pipe occlusion interlocking die, 301-connecting ring plate, 302-guide cylinder, 303-groove, 304-bulge, 4-shrinkage sleeve, 401-second feed inlet, 5-die, 6-die pressing plate, 7-die core, 8-fixed die core, 9-fixed die core screw and 10-extruder auxiliary machine component.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1 to 11, the present embodiment proposes a double-layer pipe co-extrusion die, which includes a transition sleeve 1, a splitter plate 2, a double-layer pipe engagement interlocking die 3, a shrinkage sleeve 4, a die 5, a die platen 6, a die core 7, a fixed die core 8, a fixed die core screw 9, and an extruder auxiliary assembly 10.
One end of the transition sleeve 1 is fixed on a screw flange of an extruder main machine (an extruder main machine is not shown in the figure) through bolts, and one end of the splitter plate 2 is fixed on the other end of the transition sleeve 1 through bolts.
The double-layer pipe interlocking mold 3 is used for forming a double-layer pipe in an inner-outer interlocking structure, and one end of the double-layer pipe interlocking mold 3 is fixed on the other end of the splitter plate 2 through bolts.
The transition sleeve 1 is provided with a first feeding port 101, the first feeding port 101 is used for introducing inner layer pipe raw materials, the flow dividing plate 2 is provided with a flow dividing channel 201, the flow dividing channel 201 is an annular channel, and the flow dividing channel 201 is communicated with the first feeding port 101.
The double-layer pipe occlusion interlocking die 3 comprises a connecting ring plate 301 and a guide cylinder 302 fixedly connected to one side of the connecting ring plate 301, the guide cylinder 302 is of a hollow structure, the guide cylinder 302 is of a conical cylinder shape, in the embodiment, the line of the wall surface of the guide cylinder 302 is of an arc shape, one end of the guide cylinder 302 is large in diameter, the other end is small in diameter, one end of the guide cylinder 302, large in diameter, is connected to the connecting ring plate 301, the inside of the guide cylinder 302 is communicated with a middle pore canal on the connecting ring plate 301, one side of the connecting ring plate 301 is connected with the flow dividing plate 2, and the inside of the guide cylinder 302 is communicated with the flow dividing channel 201.
One end of the shrink sleeve 4 is fixedly connected to the other side of the connection ring plate 301 through a bolt, the shrink sleeve 4 is sleeved outside the guide cylinder 302, and a certain gap is formed between the shrink sleeve 4 and the guide cylinder 302.
The shrinkage sleeve 4 is provided with a second feeding hole 401, the second feeding hole 401 is used for introducing outer layer pipe raw materials, an extruder auxiliary assembly 10 is installed at the second feeding hole 401, the extruder auxiliary assembly 10 is used for being fixed on an extruder auxiliary die, and the extruder auxiliary assembly 10 comprises an auxiliary die and an auxiliary die core.
The fixed mold core 8 is fixedly installed on the flow distribution plate 2 through a fixed mold core screw 9, the mold core 7 is fixedly installed on the fixed mold core 8 through a self-contained screw tooth structure, the fixed mold core 8 and the mold core 7 are positioned in the guide cylinder 302, a certain gap is formed between the fixed mold core 8 and the guide cylinder 302, and the gap is communicated with the flow distribution channel 201. An inner pipe raw material extrusion channel is formed among the fixed mold core 8, the mold core 7 and the inside of the guide cylinder 302.
The die 5 is clamped at the other end of the shrink sleeve 4 through a die pressing plate 6, and the die pressing plate 6 is fixed on the shrink sleeve 4 through bolts. The die 5 is sleeved outside the guide cylinder 302, and a certain gap is formed between the die and the guide cylinder 302. The die 5 is provided with an inner cavity, the shape of the inner cavity is matched with the shape of the guide cylinder 302, and an outer layer pipe raw material extrusion channel is formed between the die 5 and the outside of the guide cylinder 302.
As shown in fig. 11, a plurality of grooves 303 are formed in the outer wall surface of the guide cylinder 302 at intervals, and the grooves 303 are formed along the length direction of the guide cylinder 302. The groove 303 includes a recess and a locking portion, the locking portion is located below the recess, the recess and the locking portion are communicated, a width of the locking portion is larger than a width of the recess, and the locking portion has a left wing portion and a right wing portion. The groove 303 is a concave structure on the guide cylinder 302, after the groove 303 is arranged on the outer wall surface of the guide cylinder 302, a plurality of protrusions 304 are correspondingly formed on the inner wall surface of the guide cylinder 302, the shape of the protrusions 304 is matched with that of the groove 303, and the protrusions 304 correspond to the positions of the grooves 303 on the guide cylinder 302.
Because the outer tube raw material extrusion channel is arranged between the outside of the guide cylinder 302 and the die 5, after the outer tube raw material is extruded, a plurality of convex structures are formed on the inner wall of the outer tube; because the inner layer tube raw material extrusion channel is arranged between the inner part of the guide cylinder 302 and the fixed mold core 8 and between the inner layer tube raw material extrusion channel and the mold core 7, after the inner layer tube raw material is extruded, a plurality of groove structures are formed on the outer wall of the inner layer tube, after the inner layer tube raw material extrusion channel is extruded, the convex structures on the inner wall of the outer layer tube are just embedded into the groove structures on the outer wall of the inner layer tube to form an occlusion interlocking structure, so that the inner layer and the outer layer of the formed double-layer tube are mutually occluded, the binding force is strong, the binding area is increased, and the inner layer and the outer layer are not easy to separate.
Raw materials of the double-layer pipe are hot mixed, cold mixed and conveyed to a main screw extruder and a secondary screw extruder, the inner layer and the outer layer of the double-layer pipe are simultaneously extruded through the double-layer pipe co-extrusion die, and simultaneously, the inner layer and the outer layer of the double-layer pipe which are simultaneously extruded can be mutually locked due to the special design of the double-layer pipe occlusion interlocking die 3, so that the binding force of the inner layer and the outer layer of the pipe is ensured, and the condition that the inner layer and the outer layer of the pipe are separated after long-time use can be effectively prevented.
Meanwhile, the double-layer pipe co-extrusion die can be used for pipes with the same material or different materials as the inner layer and the outer layer, can solve the problem of poor adhesion effect between molecules of the inner layer and the outer layer of the double-layer pipe extruded by a common die, and can interlock the inner layer and the outer layer of the pipe in an occlusion way through the double-layer pipe co-extrusion die. The double-layer pipe co-extrusion die disclosed by the invention not only can extrude pipes with different inner and outer layers as different materials to obtain pipes with different inner and outer layer performances, but also can solve the problems that the similar compatibility principle of inner and outer layer raw materials cannot be well utilized, the phenomenon of layering of the inner and outer layers after extrusion cooling easily occurs, and the inner and outer layers of the pipe are separated, so that the bonding force between the inner and outer layers of the double-layer pipe with different inner and outer layers is improved.
The extrusion molding process of the double-layer pipe comprises the following steps:
raw materials of an inner layer pipe of the double-layer pipe enter a transition sleeve 1 from an extruder host, enter a double-layer pipe occluding and interlocking mold 3 through a splitter plate 2, are gradually compressed in a gap between the double-layer pipe occluding and interlocking mold 3 and a fixed mold core 8, and finally form the inner layer pipe of the double-layer pipe by matching the double-layer pipe occluding and interlocking mold 3 with the mold core 7;
Meanwhile, raw materials of the outer layer pipe of the double-layer pipe pass through the inside of the auxiliary machine die and the auxiliary machine die core, then pass through a space formed between the shrink sleeve 4 and the double-layer pipe interlocking die 3, and finally form the outer layer pipe of the double-layer pipe between the inflow port die 5 and the double-layer pipe interlocking die 3.
The inner layer pipe and the outer layer pipe of the double-layer pipe are mutually combined to form an interlocking structure, the double-layer pipe is subjected to vacuum cooling shaping, and then the procedures of code spraying, traction, cutting and packaging are carried out to form a double-layer pipe finished product.
The inner layer pipe and the outer layer pipe of the double-layer pipe are mutually self-locked, the combined area of the inner layer pipe and the outer layer pipe is improved by 60% -85%, the combined force between the inner layer pipe and the outer layer pipe is ensured, and the inner layer pipe and the outer layer pipe can be effectively prevented from being separated after long-time use.
Example 2
The embodiment provides extrusion equipment, which comprises an extruder host, wherein the extruder host is connected with the double-layer pipe co-extrusion die in the embodiment 1, and specifically, a transition sleeve 1 of the double-layer pipe co-extrusion die is fixed on a screw flange of the extruder host through bolts.
Example 3
The embodiment provides a pipe molding manufacturing method, which comprises the following steps:
S1: connecting the double-layer pipe coextrusion die described in the embodiment 1 with an extruder host;
S2: introducing an inner layer pipe raw material of the double-layer pipe into a transition sleeve 1 of a double-layer pipe co-extrusion die through an extruder host, then introducing the inner layer pipe raw material into a double-layer pipe occlusion interlocking die 3 through a splitter plate 2, gradually compressing the inner layer pipe raw material in a gap between the double-layer pipe occlusion interlocking die 3 and a fixed die core 8, and subsequently forming an inner layer pipe of the double-layer pipe by matching the double-layer pipe occlusion interlocking die 3 with the die core 7;
Meanwhile, the raw material of the outer layer pipe of the double-layer pipe passes through the auxiliary machine component 10 of the extruder and then passes through a space formed between the shrink sleeve 4 and the double-layer pipe occlusion interlocking mold 3, and the outer layer pipe of the double-layer pipe is formed between the inflow port mold 5 and the double-layer pipe occlusion interlocking mold 3;
S3: the inner layer and the outer layer of the double-layer pipe extruded from the mold core 7, the double-layer pipe interlocking mold 3 and the tail end of the mouth mold 5 are interlocked, and the double-layer pipe finished product is formed through vacuum cooling shaping, code spraying, traction, cutting and packaging procedures.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a double-deck tubular product coextrusion mould which characterized in that:
Comprises a transition sleeve, a splitter plate, a double-layer pipe occlusion interlocking die, a shrinkage sleeve, a neck die and a die core;
The transition sleeve is used for being connected with the extruder host, a first feeding hole is formed in the transition sleeve, and the first feeding hole is used for introducing raw materials of the inner layer pipe; the flow dividing plate is connected with the transition sleeve, a flow dividing channel is arranged on the flow dividing plate, and the flow dividing channel is communicated with the first feeding hole; the double-layer pipe occlusion interlocking die comprises a connecting ring plate and a guide cylinder connected to one side of the connecting ring plate, wherein the connecting ring plate is connected with the flow dividing plate, the guide cylinder is of a hollow structure, and the inside of the guide cylinder is communicated with the flow dividing channel; the die core is used for being connected with the flow distribution plate, the die core is positioned in the guide cylinder, an inner-layer pipe raw material extrusion channel is formed between the die core and the inside of the guide cylinder, and the inner-layer pipe raw material extrusion channel is communicated with the flow distribution channel; the shrink sleeve is connected with the connecting ring plate and sleeved outside the guide cylinder, and a second feeding port is arranged on the shrink sleeve and used for introducing raw materials of the outer layer pipe; the mouth die is connected to the shrink sleeve and sleeved outside the guide cylinder, and an outer layer pipe raw material extrusion channel is formed between the mouth die and the outside of the guide cylinder;
the guide cylinder is characterized in that a groove is formed in the outer wall surface of the guide cylinder along the length direction of the guide cylinder, the groove comprises a concave part and a locking part, the locking part is positioned below the concave part and is communicated with the concave part, the locking part is provided with a left wing part and a right wing part, and the width of the locking part is larger than that of the concave part; and a protrusion matched with the groove in shape is formed on the inner wall surface of the guide cylinder, and the protrusion corresponds to the groove in position.
2. The double-layer pipe coextrusion die according to claim 1, wherein:
The novel inner tube extrusion device comprises a guide cylinder, and is characterized by further comprising a fixed mold core, wherein the fixed mold core is connected to the flow distribution plate, the mold core is connected to the fixed mold core, the fixed mold core and the mold core are positioned in the guide cylinder, and an inner tube raw material extrusion channel is formed between the fixed mold core and the inside of the guide cylinder.
3. The double-layer pipe coextrusion die according to claim 1, wherein:
the guide cylinder is cone-shaped, the two ends of the guide cylinder are a first end and a second end respectively, the diameter of the first end of the guide cylinder is larger than that of the second end of the guide cylinder, and the first end of the guide cylinder is connected with the connecting annular plate.
4. A double-layer pipe co-extrusion die as claimed in claim 3, wherein:
the mouth mold is provided with an inner cavity, and the shape of the inner cavity is matched with the shape of the guide cylinder.
5. The double-layer pipe coextrusion die according to claim 1, wherein:
A plurality of grooves are formed in the outer wall surface of the guide cylinder at intervals.
6. The double-layer pipe coextrusion die according to claim 1, wherein:
one side of the connecting ring plate is connected with the flow dividing plate, and one end of the shrinkage sleeve is fixedly connected with the other side of the connecting ring plate through bolts.
7. The double-layer pipe coextrusion die according to claim 1, wherein:
the die is clamped on the shrink sleeve through a die pressing plate.
8. The double-layer pipe coextrusion die according to claim 2, wherein:
and the second feeding port is provided with an extruder auxiliary machine component which is used for being fixed on an extruder auxiliary machine die head.
9. The double-layer pipe coextrusion die according to claim 8, wherein:
The extruder auxiliary machine component comprises an auxiliary machine die and an auxiliary machine die core.
10. A pipe molding manufacturing method is characterized in that:
The method comprises the following steps:
s1: connecting the double-layer pipe coextrusion die of claim 8 with an extruder host;
S2: introducing an inner layer pipe raw material of the double-layer pipe into a transition sleeve of a double-layer pipe co-extrusion die through an extruder host, then introducing the inner layer pipe raw material into a double-layer pipe occluding and interlocking die through a splitter plate, gradually compressing the inner layer pipe raw material in a gap between the double-layer pipe occluding and interlocking die and a fixed die core, and subsequently forming an inner layer pipe of the double-layer pipe by matching the double-layer pipe occluding and interlocking die core;
Meanwhile, the outer layer pipe raw material of the double-layer pipe passes through an extruder auxiliary machine component and then passes through a space formed between the shrink sleeve and the double-layer pipe occlusion interlocking mold, and an outer layer pipe of the double-layer pipe is formed between the inflow port mold and the double-layer pipe occlusion interlocking mold;
S3: the double-layer pipe finished product is formed by carrying out vacuum cooling shaping, and then carrying out code spraying, traction, cutting and packaging procedures.
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| CN118219528B (en) | 2024-08-06 |
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