Electricity-saving furnace for seven-hole wobbler tube extrusion molding with adjustable extrusion tube

Abstract

The application relates to the technical field of pipe extrusion, in particular to a power-saving furnace for seven-hole plum-blossom pipe extrusion forming with adjustable extrusion pipes, which comprises an extrusion furnace for melting materials and a pipe die set coaxially connected to the discharge end of the extrusion furnace, a storage rack is arranged outside the discharge end of the extrusion furnace, and a plurality of pipe die sets with different specifications are arranged for staggered sliding switching; the pipe die set is coaxially composed of an extrusion pipe, a pipe sleeve die and a plurality of pipe hole dies from outside to inside, a central shaft die is sleeved on the central shaft of the extrusion pipe, and a pipe material channel is formed between the extrusion pipe and the plurality of pipe hole dies and the central shaft die; and the plurality of pipe die sets are slidingly clamped on the storage shaft. The application can complete the quick disassembly of old dies and the accurate positioning and installation of new dies by suspending a plurality of pipe die sets with different specifications on the storage rack in a staggered mode; the technical effect that only the screw extrusion function needs to be stopped when plum-blossom pipes with different aperture specifications are replaced, and the extrusion furnace heating function does not need to be stopped is achieved; and the power-saving benefit is realized.

Description

Technical Field

[0001] This invention relates to the field of pipe extrusion technology, specifically to an energy-saving furnace for extruding seven-hole plum blossom tubes with adjustable extrusion tubes. Background Technology

[0002] In the field of plastic pipe extrusion molding, multi-hole plum blossom pipes are widely used due to their advantages such as compact structure and large wiring capacity. The core of their production lies in the design and manufacturing of extrusion molds.

[0003] Application number CN201310447925.6 discloses an extrusion molding method for wear-resistant hollow pipes, comprising the following steps: adding a plastic raw material containing nano-montmorillonite into the extruder barrel, and heating and melting it within the extruder under the action of a rotating screw conveyor and an electrically heated heating device; the molten material, driven by the rotating screw, enters the extruder head through a flange from the extruder barrel, where a filter screen between the flanges blocks incompletely plasticized solids and semi-solids; within the extruder head, a variable frequency motor drives the die head to rotate at high speed, generating centrifugal force to extrude the molten material into shape; the extruded hollow pipe matrix enters a water tank under the traction of a traction machine, and is rapidly cooled using circulating cooling water, ultimately forming a hollow pipe component. This technical solution achieves radially regular orientation of nano-montmorillonite in the hollow pipe, effectively improving the high wear resistance of the hollow pipe.

[0004] Traditional multi-hole pipe extrusion dies are typically fixed to the extruder head or require cumbersome replacement. When producing pipes with different aperture specifications, the entire die assembly must be shut down and disassembled. This process is not only time-consuming, but more importantly, for safe operation and to prevent plastic decomposition at high temperatures, the extruder heating system often needs to be shut down, and the equipment must be allowed to cool down to an operational temperature. After replacing the die, it needs to be reheated to the operating temperature. This repeated cooling-heating process consumes a large amount of electrical energy, significantly increasing production costs and reducing production efficiency. While the aforementioned patent provides an extrusion method that improves pipe wear resistance through special raw materials and centrifugal molding, its technical solution focuses on material formulation and centrifugal process, without addressing the issues of rapid die replacement and related energy consumption optimization. This patented solution also faces the inherent drawback of needing to shut down, cool down, and then reheat when changing product specifications, failing to solve the high energy consumption problem during production debugging and specification switching.

[0005] Therefore, there is an urgent need for an extrusion equipment that can quickly switch between plum blossom tube molds, minimize downtime for heating, and significantly reduce energy consumption. Summary of the Invention

[0006] In order to overcome the defects in the prior art, the purpose of this invention is to provide an energy-saving furnace for extruding seven-hole plum blossom tubes with adjustable extrusion tubes. The innovative modular tube module design and its combination with the sliding switching mechanism of the shelf perfectly solve the problems of high energy consumption and low efficiency caused by specification switching in plum blossom tube production.

[0007] To achieve the above objectives, the present invention provides an energy-saving furnace for extruding and molding seven-hole plum blossom tubes with an adjustable extrusion tube, comprising an extrusion furnace for melting materials and a tube module coaxially connected to its discharge end. The discharge end of the extrusion furnace is provided with a shelf for staggered sliding switching of several tube modules of different specifications. The tube module is composed of an extrusion tube, a tube sleeve die, and several tube hole dies coaxially arranged from the outside to the inside. The inner wall of the extrusion tube is provided with several extrusion holes at equal intervals in an annular shape, and the several extrusion holes are connected to each other. The several tube hole dies are sleeved with the several extrusion holes with gaps. A central shaft die is sleeved on the central shaft of the extrusion tube, and a tube channel is formed between the extrusion tube, the several tube hole dies, and the central shaft die.

[0008] A storage shaft is inserted between the tops of the storage racks. A support ring is fitted on the outer wall of the extrusion tube. A clip is provided on one side of the support ring. The clip is a semi-circular ring structure and is limited and slidably engaged with the storage shaft. Several tube modules are slidably engaged on the storage shaft. By sliding tube modules of different specifications staggered above and below the storage shaft, they are connected to the discharge end of the extrusion furnace for use.

[0009] The above setup takes into account that when changing traditional pipe extrusion molds, because the core mold and orifice mold are installed independently, this process often requires shutting down the extruder heating system and waiting for the equipment to cool down to an operable temperature for safe operation and to prevent plastic decomposition at high temperatures, which is time-consuming. In addition, after replacing the mold with a new one, it is necessary to reheat to the working temperature. This repeated cooling-heating process consumes a lot of electrical energy, significantly increasing production costs and reducing production efficiency. Therefore, by pre-customizing pipe modules of different specifications and installing them on the shelf, combined with the staggered sliding switching structure on the shelf, the operation of changing between pipe modules of different specifications can be completed quickly and smoothly. This achieves the technical effect of greatly shortening the product specification switching and debugging time, improving the flexibility and response speed of the production line, and improving the overall production efficiency.

[0010] As a further improvement to this technical solution, the middle layer of the left and right side walls of the placement shaft is provided with sliding grooves, which extend from front to back along the placement shaft. The clamp is a semi-circular ring structure and its inner diameter is equal to the outer diameter of the placement shaft.

[0011] As a further improvement to this technical solution, screws are embedded in the side walls at both ends of the clip, and the screws are slidably connected to the inner side wall of the slide groove.

[0012] These two settings form a channel for the transverse movement of the tube module through the slide groove, enabling conversion movement; the positioning clamp slides axially above and below the slide groove by limiting the sliding of the screws, the placement shaft and the slide groove.

[0013] As a further improvement to this technical solution, the outer side of the placement shaft is provided with a plurality of turning grooves at equal intervals, the turning grooves being annular and coaxially arranged with the placement shaft.

[0014] As a further improvement to this technical solution, the screw is slidably engaged with the steering groove, and the distance between two adjacent steering grooves is greater than the axial length of the tube sleeve mold.

[0015] As a further improvement to this technical solution, the distance between the rightmost turning groove and the shelf needs to be such that the extrusion tube slides along the chute to the discharge end of the extrusion furnace and is threadedly connected.

[0016] As a further improvement to this technical solution, the distance between the leftmost turning groove and the shelf needs to be greater than the distance between the support ring and the discharge end of the extrusion tube.

[0017] As a further improvement to this technical solution, an annular groove is provided on the outer wall of the extrusion tube near its discharge end, and screws are embedded in the two side walls of the ring support frame. These screws are slidably engaged with the annular groove, and several pry blocks are provided in an annular shape at equal intervals on the outer wall of the discharge end of the extrusion tube.

[0018] The above settings are designed to switch the up and down positions of the tube module and ensure that the tube module can turn left and right at the shelf without interference. The tube module is first flipped from the bottom to the top of the shelf shaft, and then slid along the slide to the extrusion furnace discharge end for connection. At the same time, the tube module that is replaced slides along the slide to the left side of the shelf shaft, and then flips down from the left turning groove without touching the left end of the shelf.

[0019] As a further improvement to this technical solution, the feeding end of the tube die is fixedly provided with a positioning frame. The positioning frame is in the shape of a plum blossom ring and is provided with a connecting sleeve at the same position as the extrusion hole. One end of the tube die is conical and is provided with a connecting sleeve at its center. The connecting sleeve and the connecting sleeve are inserted into each other.

[0020] As a further improvement to this technical solution, the positioning frame is provided with a connecting sleeve that is sleeved with the central shaft mold at the center position. The outer end of the connecting sleeve is provided with a tapered head, and the inner wall of the feed end of the tube mold is provided with an inclined material gathering surface.

[0021] The above settings are designed to improve the flow of molten plastic in complex porous channels. By designing a connecting sleeve with a conical head when positioning the tube die, and setting an inclined material gathering surface on the inner wall of the tube die feed end, the molten plastic is guided and gathered into the tube channel to form a high-quality plum blossom tube with complete structure and uniform wall thickness.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0023] 1. This energy-saving furnace for extruding seven-hole plum blossom tubes with adjustable extrusion tubes features a rack with a storage shaft and chute outside the extruder's discharge end. Multiple tube modules of different specifications are suspended in staggered positions on the rack, allowing for pre-storage and rapid sliding switching of the tube modules. Combined with the threaded connection between the extrusion tube and the extruder's discharge end, it enables rapid disassembly of old molds and precise positioning and installation of new molds. This achieves the technical effect of stopping only the screw extrusion function when changing to plum blossom tubes of different aperture specifications, without stopping the extruder's heating function. This avoids the huge energy consumption of repeated cooling and heating in traditional methods, thus achieving energy savings.

[0024] 2. This energy-saving furnace for extruding seven-hole plum blossom tubes with adjustable extrusion tubes achieves vertical displacement, horizontal movement, and flipping of multiple tube modules within a limited space by designing the positions of grooves and turning grooves on the placement shaft. For example, the spacing at the rightmost end meets the requirements for threaded connection, the spacing at the leftmost end meets the requirements for flipping and avoiding, and the spacing between adjacent turning grooves is greater than the length of the tube die. This achieves the technical effect of ensuring that tube modules of different specifications do not interfere with each other and operate smoothly and reliably during the switching process, thus ensuring the stable realization of the quick change function.

[0025] 3. This energy-saving furnace for extruding seven-hole plum blossom tubes with adjustable extrusion tubes effectively guides and gathers molten plastic before it enters the tube channel by setting a connecting sleeve with a plum blossom annular positioning frame and a conical head at the feeding end of the tube die, and setting an inclined material gathering surface on the inner wall of the feeding end. This achieves the technical effect of improving the smoothness and uniformity of plastic melt in complex porous channels, which is conducive to forming high-quality plum blossom tubes with complete structure and uniform wall thickness. Attached Figure Description

[0026] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, will select various possible shapes and proportions to implement the invention according to specific circumstances.

[0027] Figure 1 This is a schematic diagram of the overall assembly structure of the present invention;

[0028] Figure 2 For the present invention Figure 1 Side view;

[0029] Figure 3 This is one of the schematic diagrams of the tube module assembly structure of the present invention;

[0030] Figure 4 This is the second schematic diagram of the tube module assembly structure of the present invention;

[0031] Figure 5 This is an exploded view of the tube module of the present invention;

[0032] Figure 6 This is a schematic diagram of the tube sleeve mold feed end structure of the present invention;

[0033] Figure 7 This is a front view of the tube module of the present invention;

[0034] Figure 8 This is a front view of the tube sleeve mold of the present invention;

[0035] Figure 9 This is a schematic diagram of the assembly structure of the shelf according to the present invention;

[0036] The meanings of the labels in the diagram are as follows:

[0037] 100. Extrusion furnace;

[0038] 200. Tube module; 210. Extruded tube; 211. Ring groove; 212. Push block; 220. Tube sleeve die; 221. Extrusion hole; 222. Positioning frame; 2221. Connecting sleeve; 2222. Conical head; 223. Central shaft die; 224. Material gathering surface; 230. Tube hole die; 231. Connecting sleeve; 240. Tube channel; 250. Support ring; 251. Clamp; 252. Screw;

[0039] 300, Shelf; 310, Shelf shaft; 311, Slide groove; 312, Turning groove. Detailed Implementation

[0040] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art will conceive of any possible variations of the invention, all of which should be considered within the scope of the invention. The terms "installation" and "connection" should be interpreted broadly, referring to direct connection as well as indirect connection through an intermediate medium.

[0041] The terms "central axis," "vertical," "horizontal," "front," "rear," "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer" used herein to indicate orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, in the description of the invention, "a number" means two or more, unless otherwise explicitly specified.

[0042] Please see Figures 1-8 As shown, this invention provides an energy-saving furnace for extruding seven-hole plum blossom tubes with adjustable extrusion tubes. It includes an extrusion furnace 100 for melting materials and a tube module 200 coaxially connected to its discharge end. The extrusion furnace, i.e., a plastic extruder, consists of an extrusion system, a transmission system, and a heating and cooling system. The extrusion system includes a screw, a barrel, and a hopper. The plastic is plasticized into a uniform melt through the extrusion system, and under the pressure established during this process, it is continuously extruded by the screw through the die head. This is prior art and will not be described in detail here.

[0043] An external rack 300 is provided at the discharge end of the extruder 100 for switching between several tube modules 200 of different specifications by staggered sliding. The tube modules 200 of different specifications form plum blossom tubes with different apertures by adjusting their internal dimensions. The tube module 200 is composed of an extrusion tube 210, a tube sleeve mold 220 and several tube hole molds 230 coaxially arranged from the outside to the inside. The inner wall of the extrusion tube 210 is provided with several extrusion holes 221 at equal intervals in a ring shape. Several tube hole molds 230 are connected to the several extrusion holes 221 and are sleeved with gaps so that the molten plastic can be connected into a whole tube when passing through the gaps. A central shaft mold 223 is sleeved on the central shaft of the extrusion tube 210. The extrusion tube 210 forms a tube channel 240 with several tube hole dies 230 and a central shaft die 223. This tube channel 240 is the structure of a plum blossom tube. The number of extrusion holes 221 and central shaft dies 223 is designed according to the number of tube holes required. By customizing tube module sets 200 of different specifications, the size of the extrusion holes 221, several tube hole dies 230 and central shaft dies 223 can be changed to adapt to each other and become smaller. The tube module set 200 of the required specifications can be replaced according to customer needs to extrude and form tubes. That is, by quickly switching between different specifications of tube module sets 200 in the shelf 300 for production debugging, only the screw extrusion function needs to be stopped, and the heating function of the extrusion furnace 100 does not need to be stopped, saving the power consumption cost of cooling and heating.

[0044] Furthermore, an annular groove 211 is provided on the outer wall of the extrusion tube 210 near its discharge end, and screws 252 are embedded in the two side walls of the ring support 250. The screws 252 are slidably engaged with the annular groove 211, so that the extrusion tube 210 and the ring support 250 can rotate relative to each other without axial slippage. Several paddles 212 are provided in annular intervals on the outer wall of the discharge end of the extrusion tube 210. By moving the paddles 212, the extrusion tube 210 is rotated and threaded to the discharge port of the extrusion furnace 100, so that the molten plastic is extruded through the tube module 200 to form a tube structure.

[0045] Furthermore, the feed end of the tube sleeve mold 220 is fixedly provided with a positioning frame 222. The positioning frame 222 is in the shape of a plum blossom ring and is provided with a connecting sleeve 2221 at the same position as the extrusion hole 221, so that the molten plastic can pass smoothly. One end of the tube hole mold 230 is conical and a connecting sleeve 231 is provided at its center. The connecting sleeve 231 and the connecting sleeve 2221 are inserted and matched. Both the tube hole mold 230 and the central shaft mold 223 are made of stainless steel hollow cylindrical structure to reduce their weight, so that the tube hole mold 230 can be installed quickly and stably suspended, thereby forming a stable tube channel 240 through which the molten plastic passes.

[0046] Furthermore, in order to improve the flow of molten plastic, the positioning frame 222 is provided with a connecting sleeve 2221 at the center position, which is sleeved with the central shaft mold 223. The outer end of the connecting sleeve 2221 is provided with a conical head 2222. The inner wall of the feed end of the tube mold 220 is provided with an inclined material gathering surface 224. Both the conical head 2222 and the material gathering surface 224 can guide the molten plastic to gather and pass through the tube channel 240.

[0047] like Figure 5 and Figure 9 As shown, in order to enable the staggered sliding switching of several tube modules 200 of different specifications, a storage shaft 310 is inserted between the tops of the storage rack 300, and a support ring 250 is positioned and sleeved on the outer wall of the extrusion tube 210. A clip 251 is provided on one side of the support ring 250. The clip 251 is a semi-circular ring structure and is limited and locked to the storage shaft 310 for sliding. Several tube modules 200 are slidably locked onto the storage shaft 310. By sliding the tube modules 200 of different specifications staggered above and below the storage shaft 310, they can be connected to the discharge end of the extrusion furnace 100 for use.

[0048] Furthermore, the left and right side walls of the storage shaft 310 are provided with grooves 311, which extend from front to back along the storage shaft 310 to form a channel for the transverse movement of the tube module 200; the clamp 251 has a semi-circular ring structure and its inner diameter is equal to the outer diameter of the storage shaft 310; screws 252 are embedded in the side walls at both ends of the clamp 251, and the screws 252 are slidably connected to the inner side wall of the groove 311 to position the clamp 251 to slide axially above and below the groove 311.

[0049] In addition, in order to switch the upper and lower positions of the tube module 200, a number of turning grooves 312 are equally spaced on the outer side of the placement shaft 310. The turning grooves 312 are annular and coaxial with the placement shaft 310. The screw 252 is slidably engaged with the turning grooves 312. The distance between two adjacent turning grooves 312 is greater than the axial length of the tube sleeve mold 220, so that the upper and lower clamps 251 can slide out of alignment when they meet.

[0050] Furthermore, in order to ensure that the tube module 200 can turn around at the left and right ends of the shelf 300 without interference, the distance between the rightmost turning groove 312 and the shelf 300 must be such that the extruded tube 210 slides along the slide groove 311 to the discharge end of the extruder 100 and is threadedly connected, so that the tube module 200 first flips from below to above the shelf shaft 310, and then slides along the slide groove 311 to approach the discharge end of the extruder 100 for connection.

[0051] The distance between the leftmost turning groove 312 and the shelf 300 must be greater than the distance between the ring bracket 250 and the discharge end of the extrusion tube 210, so that the replaced tube module 200 can slide along the slide groove 311 to the left of the shelf shaft 310, and then flip down from the left turning groove 312 without touching the left end of the shelf 300.

[0052] The energy-saving furnace for extruding seven-hole plum blossom tubes with adjustable extrusion tubes of the present invention preheats the furnace body by activating the heating function of the extrusion furnace 100 and then activating the extrusion function of the extrusion furnace 100 to extrude molten plastic through the tube channel 240 of the tube module 200 to form a multi-hole plum blossom tube structure. The tube module 200 of the required specifications can be changed according to customer needs to extrude the tube, i.e., production debugging can be carried out by quickly switching between different specifications of tube modules 200 on the shelf 300. Specifically... The connected extrusion tube 210 is removed and slid along the top of the placement shaft 310 to its left end, while the tube module 200 suspended below the placement shaft 310 is slid to its right end and flipped from the rightmost turning groove 312 to the top of the placement shaft 310. Then, it slides along the slide groove 311 to approach the discharge end of the extrusion furnace 100 and rotates the extrusion tube 210 to make a threaded connection. This process only requires stopping the screw extrusion function and does not require stopping the heating function of the extrusion furnace 100, thus saving the power cost of cooling and heating.

[0053] It should be noted that the fixed connections and fixing methods of the present invention are achieved using conventional fixing means such as bolt connections or welding. The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. An energy-saving furnace for extruding seven-hole plum blossom tubes with adjustable extrusion tubes, characterized in that: The device includes an extrusion furnace for melting materials and a tube module coaxially connected to its discharge end. The discharge end of the extrusion furnace is equipped with a shelf for staggered sliding switching of several tube modules of different specifications. The tube module is composed of an extrusion tube, a tube sleeve die, and several tube hole dies coaxially arranged from the outside to the inside. The inner wall of the extrusion tube is provided with several extrusion holes at equal intervals in an annular shape, and the several extrusion holes are connected to each other. The several tube hole dies are sleeved with the several extrusion holes with gaps. A central shaft die is sleeved on the central shaft of the extrusion tube. A tube channel is formed between the extrusion tube, the several tube hole dies, and the central shaft die. A storage shaft is inserted between the tops of the storage racks. A support ring is fitted on the outer wall of the extrusion tube. A clip is provided on one side of the support ring. The clip is a semi-circular ring structure and is limited and slidably engaged with the storage shaft. Several tube modules are slidably engaged on the storage shaft. By sliding tube modules of different specifications staggered above and below the storage shaft, they can be connected to the discharge end of the extrusion furnace. The left and right side walls of the storage shaft are provided with sliding grooves in the middle layer, and the sliding grooves extend from front to back along the storage shaft. The clip has a semi-circular ring structure and its inner diameter is equal to the outer diameter of the storage shaft. Screws are embedded in the side walls at both ends of the clip, and the screws are slidably connected to the inner side wall of the slide groove; The outer side of the placement shaft is provided with several equidistant turning grooves, which are annular and coaxial with the placement shaft.

2. The energy-saving furnace for extruding and molding a seven-hole plum blossom tube with an adjustable extrusion tube according to claim 1, characterized in that: The screw is slidably engaged with the steering groove, and the distance between two adjacent steering grooves is greater than the axial length of the tube sleeve mold.

3. The energy-saving furnace for extruding and molding a seven-hole plum blossom tube with an adjustable extrusion tube according to claim 2, characterized in that: The distance between the rightmost turning groove and the shelf must be such that the extrusion tube slides along the chute to the discharge end of the extrusion furnace and is threadedly connected.

4. The energy-saving furnace for extruding and molding a seven-hole plum blossom tube with an adjustable extrusion tube according to claim 3, characterized in that: The distance between the leftmost turning groove and the shelf must be greater than the distance between the support ring and the discharge end of the extrusion tube.

5. The energy-saving furnace for extruding and molding a seven-hole plum blossom tube with an adjustable extrusion tube according to claim 4, characterized in that: The extrusion tube has an annular groove on its outer wall near the discharge end. Screws are embedded in the two side walls of the ring support frame. These screws are slidably engaged with the annular groove. The outer wall of the discharge end of the extrusion tube is provided with several pry blocks at equal intervals in a ring.

6. The energy-saving furnace for extruding and molding a seven-hole plum blossom tube with an adjustable extrusion tube according to claim 5, characterized in that: The feed end of the tube die is fixedly provided with a positioning frame. The positioning frame is in the shape of a plum blossom ring and is provided with a connecting sleeve at the same position as the extrusion hole. One end of the tube die is conical and is provided with a connecting sleeve at its center. The connecting sleeve and the connecting sleeve are inserted into each other.

7. The energy-saving furnace for extruding seven-hole plum blossom tubes with adjustable extrusion tubes according to claim 6, characterized in that: The positioning frame has a connecting sleeve at its center that fits into the central shaft mold. The outer end of the connecting sleeve has a tapered head, and the inner wall of the feed end of the tube mold has an inclined material gathering surface.

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