CN114043698A - Co-extrusion die - Google Patents

Abstract

The invention discloses a co-extrusion die, and relates to the technical field of dies. The co-extrusion die comprises a feeding ring assembly, an outer die, a die core and a die. The outer die is sleeved outside the die core and forms a flow channel together with the die core, the neck die is fixedly connected to one end of the outer die, the neck die and the die core are both sleeved outside the feeding ring component and form an annular channel together with the feeding ring component for feeding the tubular strip blank, the flow channel is communicated with the outer side of the annular channel and is used for feeding the material into the annular channel, the feeding ring component is provided with a feeding channel, two ends of the feeding channel are both communicated with the inner side of the annular channel, and the feeding channel is used for allowing the material penetrating through the tubular strip blank to flow under the action of pressure. The co-extrusion die provided by the invention can realize the extrusion molding of the composite pipeline in a co-extrusion mode, thereby improving the production efficiency, shortening the production period and saving the labor cost and the time cost.

Description

Co-extrusion die

Technical Field

The invention relates to the technical field of dies, in particular to a co-extrusion die.

Background

At present, the composite pipeline is widely applied to production and life due to excellent physical and chemical properties. The composite pipeline comprises a multilayer tubular structure, and in the production process of the composite pipeline, the single-layer tubular structure is generally formed by extruding materials, and then the multilayer tubular structure is compounded by welding and other modes. However, the production efficiency of the composite pipeline is low, the production period is long, and the labor cost and the time cost are high.

In view of this, it is important to design and manufacture a co-extrusion mold with high production efficiency, especially in the production of composite pipes.

Disclosure of Invention

The invention aims to provide a co-extrusion die which can realize the extrusion molding of a composite pipeline in a co-extrusion mode, improve the production efficiency, shorten the production period and save the labor cost and the time cost.

The invention is realized by adopting the following technical scheme.

The utility model provides a co-extrusion die, including the feeding ring subassembly, the external mold, mold core and bush, the external mold cover is located outside the mold core, and enclose into the runner jointly with the mold core, bush fixed connection is in the one end of external mold, bush and mold core all overlap and locate outside the feeding ring subassembly, and enclose into the annular channel who is used for supplying tubulose area base to send with the feeding ring subassembly jointly, the runner communicates with the outside of annular channel, the runner is used for sending the material into annular channel, so that a part of material extrudees from the outside of tubulose area base and forms first material layer, the feeding ring subassembly has seted up the pay-off passageway, the both ends of pay-off passageway all communicate with the inboard of annular channel, the pay-off passageway is used for supplying to permeate the material flow that passes tubulose area base under the pressure effect, so that another part of material extrudes from the inboard of tubulose area base and forms the second material layer.

Optionally, the feeding channel is provided with a feeding port and a discharging port, the feeding port is located at a position corresponding to the outlet of the flow channel, the feeding port is used for allowing the material penetrating through the tubular strip blank under the action of pressure to flow in, and the discharging port is used for conveying the material to the inner side of the tubular strip blank.

Optionally, the feeding ring assembly includes an inner sleeve, a feeding ring and a fixing sleeve, the feeding ring is sleeved outside the inner sleeve, the feeding channel is arranged between the feeding ring and the inner sleeve, the fixing sleeve is fixedly connected with the feeding ring, and the fixing sleeve is arranged in the die core.

Optionally, the feeding ring comprises an end plate and a ring body, the end plate is fixedly connected to one end of the ring body and fixedly connected to the fixing sleeve, the ring body is sleeved outside the inner sleeve, part of the inner sleeve extends out of the ring body, the feeding port is formed in the circumferential surface of the ring body, and a discharging port is formed between one end of the ring body, which is far away from the end plate, and the inner sleeve.

Optionally, the number of the feed inlets is multiple, and the multiple feed inlets are arranged on the circumferential surface of the ring body in an annular array.

Optionally, a flow groove is formed on the circumferential surface of the mold core, and the outer mold cover is arranged outside the flow groove and forms a flow channel together with the flow groove.

Optionally, the flow channel comprises a main flow channel and a plurality of branch flow channels, the main flow channel being in simultaneous communication with the plurality of branch flow channels, the branch flow channels being in communication with the annular channel.

Alternatively, the plurality of branch flow grooves are arranged at intervals and are spirally arranged on the circumferential surface of the mold core.

Optionally, the co-extrusion die further comprises a feeding pipe, the outer die comprises a feeding die section and a feeding die section, one end of the feeding die section is fixedly connected with the feeding die section, the other end of the feeding die section is fixedly connected with the neck die, and the feeding pipe is installed on the feeding die section and is communicated with the flow channel.

Optionally, the co-extrusion die further comprises a pressure ring, the neck mold is provided with an annular boss, the pressure ring is sleeved outside the neck mold and is fixedly connected with the outer mold, and the annular boss is clamped between the pressure ring and the outer mold.

The co-extrusion die provided by the invention has the following beneficial effects:

the co-extrusion die provided by the invention has the advantages that the outer die is sleeved outside the die core and forms a flow channel together with the die core, the die is fixedly connected to one end of the outer die, the die and the die core are sleeved outside the feeding ring assembly and form an annular channel together with the feeding ring assembly for feeding a tubular strip blank, the flow channel is communicated with the outer side of the annular channel and is used for feeding materials into the annular channel so that a part of the materials are extruded from the outer side of the tubular strip blank to form a first material layer, the feeding ring assembly is provided with a feeding channel, two ends of the feeding channel are communicated with the inner side of the annular channel, and the feeding channel is used for allowing the materials penetrating through the tubular strip blank to flow under the action of pressure so that the other part of the materials are extruded from the inner side of the tubular strip blank to form a second material layer. Compared with the prior art, the co-extrusion die provided by the invention adopts the flow channel communicated with the outer side of the annular channel and the feeding channel communicated with the inner side of the annular channel, so that the extrusion molding of the composite pipeline can be realized in a co-extrusion mode, the production efficiency is improved, the production period is shortened, and the labor cost and the time cost are saved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is an isometric view of a co-extrusion die provided by an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a composite pipe produced by a co-extrusion die according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of a co-extrusion die provided in accordance with an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a feed ring assembly in a co-extrusion die provided in accordance with an embodiment of the present invention;

FIG. 5 is an isometric view of a core and feed ring assembly of a co-extrusion die according to an embodiment of the present invention;

FIG. 6 is a front view of a connection between a core and a feed ring assembly of a co-extrusion die according to an embodiment of the present invention;

FIG. 7 is a sectional view of the connection of the core and the die with the outer mold in the co-extrusion mold according to the embodiment of the invention.

Icon: 100-co-extrusion die; 110-a feed ring assembly; 111-a feed channel; 1111-feed inlet; 1112-a discharge port; 112-inner sleeve; 113-a feed ring; 1131 — end plate; 1132 — a ring body; 114-a fixation sleeve; 120-external mold; 121-a feed die section; 122-a feed mold section; 130-a mold core; 131-a flow channel; 132-a main flow channel; 133-side flow cell; 140-die; 141-annular boss; 150-a feed pipe; 160-a pressure ring; 170-sealing the cover plate; 180-heat preservation cover plate; 190-a flow channel; 200-an annular channel; 300-composite pipe; 310-a first material layer; 320-a tubular strip blank; 330-second material layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside", "outside", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally put in use of products of the present invention, and are only for convenience of description and simplicity of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," "mounted," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Some embodiments of the invention are described in detail below with reference to the accompanying drawings. Features in the embodiments described below may be combined with each other without conflict.

Referring to fig. 1, fig. 2 and fig. 3, a co-extrusion mold 100 for producing a composite pipe 300 is provided in an embodiment of the present invention. The extrusion molding of the composite pipeline 300 can be realized through a co-extrusion mode, the production efficiency is improved, the production period is shortened, and the labor cost and the time cost are saved.

It should be noted that, the co-extrusion mold 100 is applied to the production and processing of the composite pipeline 300, and the co-extrusion mold 100 can realize the one-time extrusion molding of the composite pipeline 300, so as to improve the production efficiency and shorten the production cycle. In this embodiment, the composite pipe 300 has a three-layer structure, and the first material layer 310, the tubular belt blank 320 and the second material layer 330 are respectively arranged from outside to inside, and the co-extrusion mold 100 can simultaneously realize extrusion molding of the three-layer structure, which is convenient and fast.

The co-extrusion die 100 includes a feed ring assembly 110, an outer die 120, a die core 130, a die 140, a feed tube 150, a compression ring 160, a sealing cover plate 170, and a thermal cover plate 180. The outer mold 120 is sleeved outside the mold core 130, and forms a flow channel 190 together with the mold core 130, and the flow channel 190 is used for flowing liquid materials. The die 140 is fixedly coupled to one end of the outer die 120 to fix the relative position of the die 140 and the core 130. The die 140 and the die core 130 are sleeved outside the feeding ring assembly 110, and together with the feeding ring assembly 110, form an annular channel 200 for feeding the tubular strip blank 320, and the tubular strip blank 320 is fed forward under the action of a tractor, so as to realize uniform motion of the tubular strip blank 320 in the annular channel 200. Flow channel 190 communicates with the outside of annular channel 200 and flow channel 190 is used to feed material into annular channel 200 such that a portion of the material is fed outwardly along the outside of tubular strip 320 and extruded by die 140 and by the extrusion of feed ring assembly 110 to form first material layer 310. The feeding ring assembly 110 is provided with a feeding channel 111, two ends of the feeding channel 111 are both communicated with the inner side of the annular channel 200, and the feeding channel 111 is used for allowing the material penetrating through the tubular strip blank 320 to flow under the action of pressure, so that the other part of the material is fed outwards along the inner side of the tubular strip blank 320 and extruded by the die 140 and the feeding ring assembly 110 to form a second material layer 330. In this way, the first material layer 310, the tubular belt blank 320 and the second material layer 330 are simultaneously output from the annular channel 200, so as to realize the co-extrusion molding of the composite pipeline 300, improve the production efficiency of the composite pipeline 300 and shorten the production period of the composite pipeline 300.

The supply pipe 150 is installed on the outer mold 120 and communicates with the flow passage 190. The supply pipe 150 is used to convey the material into the flow channel 190 under the action of the press to achieve continuous supply of the material. The pressing ring 160 is sleeved outside the neck mold 140 and fixedly connected with the outer mold 120, and the pressing ring 160 can further fix the relative position of the neck mold 140 and the outer mold 120, so as to prevent the neck mold 140 from displacing relative to the outer mold 120 and ensure that the neck mold 140 and the mold core 130 are coaxially arranged. The one end of feed ring subassembly 110 is located in sealed apron 170 lid, and the other end of feed ring subassembly 110 is located in the lid of heat preservation apron 180, sealed apron 170 and the combined action of heat preservation apron 180 to two terminal surfaces to feed ring subassembly 110 seal, reduce the heat and scatter and disappear, realize the heat preservation function.

Specifically, the die 140 can be replaced according to the wall thickness of the composite pipe 300, and the dies 140 with different sizes can produce composite pipes 300 with different wall thicknesses. The neck ring 140 is fixedly connected with the outer die 120 through a press ring 160, and bolts can be arranged on the outer ring of the end part at intervals to adjust the position in the axial direction, so as to ensure that the wall thickness of the extruded composite pipeline 300 is uniform.

Referring to fig. 4, it is noted that the feeding channel 111 is provided with a feeding port 1111 and a discharging port 1112, and the position of the feeding port 1111 corresponds to the position of the outlet of the flow channel 190. The inlet 1111 is used for the inflow of material that permeates through the tubular strip 320 under pressure, and the outlet 1112 is used for the delivery of material to the inside of the tubular strip 320. Specifically, during the co-extrusion process of the composite pipe 300, the material is injected into the flow channel 190 by the press and flows into the annular channel 200 from the outlet of the flow channel 190, at this time, since the outlet of the flow channel 190 corresponds to the position of the feed port 1111 and the air pressure in the feed channel 111 is relatively small, a part of the material permeates through the tubular strip blank 320 under pressure and flows into the feed channel 111 from the feed port 1111, and then the part of the material flows forward along the feed channel 111 under pressure and is output from the discharge port 1112 and is fed outward along the inner side of the tubular strip blank 320.

Further, during the flow of the material from the outlet of the flow channel 190 to the annular passage 200, another portion of the material that does not penetrate through the tubular strip 320 is fed outwardly under pressure along the outside of the tubular strip 320. Therefore, the inner side and the outer side of the tubular belt blank 320 are provided with materials, the materials on the inner side and the outer side are extruded out from the annular channel 200 along with the tubular belt blank 320, the co-extrusion function is realized, the composite pipeline 300 with a three-layer structure is formed at one time, and the production efficiency is high.

The feed ring assembly 110 includes an inner sleeve 112, a feed ring 113, and a retaining sleeve 114. The feeding ring 113 is sleeved outside the inner sleeve 112, the feeding channel 111 is arranged between the feeding ring 113 and the inner sleeve 112, and materials can flow between the feeding ring 113 and the inner sleeve 112. The fixed sleeve 114 is fixedly connected with the feeding ring 113, the fixed sleeve 114 is arranged in the mold core 130, the partial annular channel 200 is arranged between the fixed sleeve 114 and the mold core 130, and the fixed sleeve 114 is used for fixing the position of the feeding ring 113 and improving the strength and stability of the feeding ring 113.

In this embodiment, endotheca 112, feeding ring 113 and fixed cover 114 are independent parts, can assemble or split, compare in the feeding tube core of integral type among the prior art, and feeding ring subassembly 110 can reduce weight and size of self by a wide margin, effectively reduces the wall thickness of fixed cover 114, realizes the lightweight of production and processing, material saving cost. In addition, the inner sleeve 112, the feeding ring 113 and the fixing sleeve 114 are separately arranged, so that the overall length of the co-extrusion die 100 is increased, and the influence of angular deviation of a tube core on the wall thickness of the extruded composite pipeline 300 can be greatly reduced.

The feed ring 113 includes an end plate 1131 and a ring body 1132. End plate 1131 fixed connection is in the one end of ring body 1132, and with fixed cover 114 fixed connection, end plate 1131 can effectively improve the intensity of feed ring subassembly 110, prevents that feed ring subassembly 110 from taking place to warp. The ring body 1132 is sleeved outside the inner sleeve 112, a part of the inner sleeve 112 extends out of the ring body 1132, a part of the ring body 1132 and a part of the inner sleeve 112 extending out of the ring body 1132 form a part of an annular channel 200 with the neck ring 140, and a feeding channel 111 is formed between the ring body 1132 and the part of the inner sleeve 112 arranged in the ring body 1132. Feed inlet 1111 opens and sets up on the global of ring body 1132, and the material can flow into feeding channel 111 from the global of ring body 1132. A discharge port 1112 is formed between one end of the ring body 1132, which is far away from the end plate 1131, and the inner sleeve 112, the discharge port 1112 is a gap between the ring body 1132 and the inner sleeve 112, and the material can flow out of the feeding channel 111 from the gap.

Referring to fig. 5 and fig. 6, it should be noted that the number of the feed ports 1111 is plural, the feed ports 1111 are disposed on the circumferential surface of the ring body 1132 in an annular array, and the material can flow into the feed channel 111 from the feed ports 1111 at the same time, so as to improve the material permeation efficiency and facilitate the extrusion molding of the second material layer 330.

It should be noted that the mold core 130 has a flow groove 131 formed on the circumferential surface thereof, the outer mold 120 covers the flow groove 131 and forms a flow channel 190 together with the flow groove 131, and the material can flow between the flow groove 131 and the outer mold 120. The outer mold 120 can seal the opening of the flow groove 131 to prevent the material from leaking out of the flow groove 131, and ensure that the material can only flow forward along the extending direction of the flow groove 131.

The flow groove 131 includes a main flow groove 132 and a plurality of branch flow grooves 133. The main flow groove 132 is simultaneously communicated with the plurality of branch flow grooves 133, the branch flow grooves 133 are communicated with the annular passage 200, and the material can be injected into the main flow groove 132 through the supply pipe 150, then simultaneously flow into the plurality of branch flow grooves 133, and finally enter the annular passage 200. Thus, the annular channel 200 can be filled with the materials quickly, and the feeding effect is good.

In this embodiment, the plurality of branched flow grooves 133 are provided at intervals, and are each provided spirally on the circumferential surface of the core 130. The design of spiral branch flow groove 133 can effectively avoid inflection points and bends that easily appear in conventional arc and the dendritic channel for the material circulation is more smooth and easy, can not appear blocking up and the phenomenon that the material takes place to degrade in runner 190 for too long time.

Specifically, in the process of feeding the material, the material is first injected into the main flow groove 132 through the feed pipe 150; then enters the sixteen branch flow grooves 133 through one-half two, two-half four, four-quarter eight and eight-half sixteen simultaneously; finally, the material flows simultaneously from the sixteen branch channels 133 into the annular channel 200 to converge at the end of the die 140. However, the number of the sub-flow grooves 133 may be eight or thirty-two in other embodiments, and the number of the sub-flow grooves 133 is not particularly limited.

Referring to fig. 7, the outer mold 120 includes a feeding mold section 121 and a feeding mold section 122. One end of the feeding mold segment 122 is fixedly connected with the feeding mold segment 121, and the other end is fixedly connected with the neck mold 140 through a press ring 160. Feed tube 150 is mounted on feed mold section 121 and is in communication with flow channel 190. Specifically, the neck mold 140 is provided with an annular boss 141, the pressing ring 160 is sleeved outside the neck mold 140 and is fixedly connected with the feeding mold section 122 through a bolt, the annular boss 141 is clamped between the pressing ring 160 and the feeding mold section 122 of the outer mold 120, and the pressing ring 160 and the feeding mold section 122 of the outer mold 120 cooperate to fix the position of the annular boss 141, so as to fix the position of the neck mold 140 and prevent the neck mold 140 from relative displacement.

In the co-extrusion die 100 provided by the embodiment of the invention, the outer die 120 is sleeved outside the die core 130 and encloses a flow channel 190 together with the die core 130, the die 140 is fixedly connected to one end of the outer die 120, the die 140 and the die core 130 are both sleeved outside the feeding ring assembly 110 and enclose an annular channel 200 together with the feeding ring assembly 110 for feeding the tubular strip blank 320, the flow channel 190 is communicated with the outer side of the annular channel 200, the flow channel 190 is used for feeding materials into the annular channel 200 so that a part of the materials are extruded from the outer side of the tubular strip blank 320 to form the first material layer 310, the feeding ring assembly 110 is provided with the feeding channel 111, two ends of the feeding channel 111 are communicated with the inner side of the annular channel 200, and the feeding channel 111 is used for allowing the materials penetrating through the tubular strip blank 320 to flow under the action of pressure so that the other part of the materials are extruded from the inner side of the tubular strip blank 320 to form the second material layer 330. Compared with the prior art, the co-extrusion die 100 provided by the invention adopts the flow channel 190 communicated with the outer side of the annular channel 200 and the feeding channel 111 communicated with the inner side of the annular channel 200, so that the extrusion molding of the composite pipeline 300 can be realized in a co-extrusion mode, the production efficiency is improved, the production period is shortened, and the labor cost and the time cost are saved.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A co-extrusion die is characterized by comprising a feeding ring assembly, an outer die, a die core and a die opening, wherein the outer die is sleeved outside the die core and forms a flow channel together with the die core, the die opening is fixedly connected to one end of the outer die, the die opening and the die core are both sleeved outside the feeding ring assembly and form an annular channel together with the feeding ring assembly for feeding a tubular strip blank, the flow channel is communicated with the outer side of the annular channel and is used for feeding the material into the annular channel so that a part of the material is extruded from the outer side of the tubular strip blank to form a first material layer, the feeding ring assembly is provided with a feeding channel, two ends of the feeding channel are both communicated with the inner side of the annular channel, and the feeding channel is used for allowing the material penetrating through the tubular strip blank to flow under the action of pressure, so that another part of the material is extruded from the inside of the tubular strip to form a second material layer.

2. The co-extrusion die as claimed in claim 1, wherein the feeding channel is provided with a feeding port and a discharging port, the feeding port is located at a position corresponding to the outlet of the flow channel, the feeding port is used for allowing the material penetrating through the tubular strip blank to flow in under pressure, and the discharging port is used for conveying the material to the inner side of the tubular strip blank.

3. The co-extrusion die of claim 2, wherein the feeding ring assembly comprises an inner sleeve, a feeding ring and a fixing sleeve, the feeding ring is sleeved outside the inner sleeve, the feeding channel is arranged between the feeding ring and the inner sleeve, the fixing sleeve is fixedly connected with the feeding ring, and the fixing sleeve is arranged in the die core.

4. The co-extrusion die as claimed in claim 3, wherein the feeding ring comprises an end plate and a ring body, the end plate is fixedly connected to one end of the ring body and is fixedly connected to the fixing sleeve, the ring body is sleeved outside the inner sleeve, a portion of the inner sleeve extends out of the ring body, the feeding holes are formed in the circumferential surface of the ring body, and the discharging holes are formed between one end of the ring body, which is far away from the end plate, and the inner sleeve.

5. The co-extrusion die of claim 4, wherein the number of the feed openings is multiple, and the feed openings are arranged on the circumferential surface of the ring body in an annular array.

6. The co-extrusion die as claimed in claim 1, wherein a flow groove is formed on the circumferential surface of the die core, and the outer die cover is arranged outside the flow groove and forms the flow channel together with the flow groove.

7. Co-extrusion die according to claim 6, wherein the flow groove comprises a main flow groove and a plurality of branch flow grooves, the main flow groove being in communication with a plurality of the branch flow grooves simultaneously, the branch flow grooves being in communication with the annular channel.

8. The coextrusion die of claim 7, wherein the plurality of branched flow grooves are arranged at intervals and are each spirally arranged on the circumferential surface of the die core.

9. The co-extrusion die of claim 1, further comprising a supply pipe, wherein the outer die comprises a feeding die section and a feeding die section, one end of the feeding die section is fixedly connected with the feeding die section, the other end of the feeding die section is fixedly connected with the die, and the supply pipe is mounted on the feeding die section and is communicated with the flow channel.

10. The co-extrusion die as claimed in claim 1, further comprising a pressure ring, wherein the die is provided with an annular boss, the pressure ring is sleeved outside the die and is fixedly connected with the outer die, and the annular boss is clamped between the pressure ring and the outer die.

Images