Constant temperature storage device with extrusion function

Abstract

The present application relates to the technical fields of manufacturing large pipe-shaped plastic products, and particularly relates to a constant-temperature storage device with extrusion function, which comprises a support assembly, a storage tank and an extrusion assembly, the storage tank is provided with a molten plastic inlet, a molten plastic outlet and a temperature control assembly, the molten plastic inlet is used for connecting the molten plastic, the molten plastic outlet is used for discharging the molten plastic, and the temperature control assembly is used for controlling the temperature of the molten plastic stored in the storage tank, so that the molten plastic can keep the melting temperature; the extrusion assembly is used for applying pressure to the molten plastic, so that the molten plastic is extruded and discharged from the molten plastic outlet. The constant-temperature storage device with extrusion function can store and control the temperature of the molten plastic by using the large-capacity storage tank, and then the molten plastic can be discharged through the fast and uniform extrusion operation, so that the molten plastic can enter the mold cavity more quickly, and the production efficiency can be improved and the production quality of the large pipe can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of manufacturing large round tubular plastic products, in particular to a constant-temperature storage device with extrusion function. BACKGROUND

[0002] In the plastic pipe industry, sometimes it is necessary to obtain large round tubular plastic products such as Figure 11 The actual size of this product is relatively large, with a diameter of more than 2000 mm and a weight of more than 2000 kg. It is not convenient to obtain it by conventional injection molding method. Because the conventional screw type extruder is used to heat the plastic particles and then extrude the molten plastic, this process is relatively slow, and a large amount of molten plastic is needed for large plastic pipe fittings, and the molten plastic needed for a single product is measured in tons. If it is allowed to slowly inject into the mold, the injection time may even take 5-10 hours. At this time, the molten plastic injected first has been gradually cooled, and the molten plastic behind has not been completely injected, which is easy to cause the generated plastic pipe fittings to produce welding marks, reduce the overall bonding strength of the product, and result in the quality of the final product being not up to standard. Moreover, during the long waiting process of injecting the molten plastic, other equipment can only be idle, reducing the production efficiency and wasting production equipment.

[0003] Therefore, in the production process of large pipe fittings, how to speed up the production speed and ensure the production quality is a technical problem to be solved. SUMMARY

[0004] The present application is to overcome the above-mentioned shortcomings, and aims to provide a technical solution to solve the above-mentioned problems.

[0005] The present application provides a constant-temperature storage device with extrusion function, which comprises a support assembly, a storage tank and an extrusion assembly fixedly connected to the support assembly, the storage tank is used for storing molten plastic, the storage tank is provided with a molten plastic inlet, a molten plastic outlet and a temperature control assembly, the molten plastic inlet is used for connecting the molten plastic from the external equipment, the molten plastic outlet is used for discharging the molten plastic, and the temperature control assembly is used for controlling the temperature of the molten plastic stored in the storage tank, so that the molten plastic maintains the molten temperature; the extrusion assembly is used for applying pressure to the molten plastic, so that the molten plastic is extruded and discharged from the molten plastic outlet.

[0006] As a further scheme of the present application: the storage tank is provided with a tank body and a tank bottom, a storage chamber is formed between the upper part of the tank body and the tank bottom, and the storage chamber is used for storing molten plastic; an extrusion channel is formed between the lower part of the tank body and the tank bottom, and the extrusion channel is used for discharging the molten plastic; a connecting column is arranged in the extrusion channel, one end of the connecting column is fixedly connected to the tank body, and the other end of the connecting column is fixedly connected to the tank bottom.

[0007] As a further scheme of the present application: the tank bottom is provided with a certain thickness, thereby forming a cylinder with a certain length, and further making the extrusion channel formed between the cylinder and the tank body have a certain length; the cylinder formed by the tank bottom has a smaller diameter at one end of the storage chamber than at the other end, thereby making the opening of the extrusion channel formed between the cylinder and the tank body at one end of the storage chamber larger than at the other end, and further making the molten plastic in the storage chamber flow into the extrusion channel from the storage chamber.

[0008] As a further scheme of the present application: the extrusion assembly is provided with an extrusion oil pump and an extrusion piston, the extrusion oil pump is fixedly connected to the support assembly, the extrusion piston is fixedly connected to the piston rod of the extrusion oil pump, the extrusion piston abuts against the inner wall of the tank body and forms a sliding connection, the extrusion oil pump drives the piston rod to move downward, thereby synchronously moving the extrusion piston in the direction of the tank bottom, and further extruding the molten plastic stored in the storage chamber to be extruded from the extrusion channel.

[0009] As a further scheme of the present application: the temperature control assembly is provided with an outer oil channel, an outer oil inlet pipe and an outer oil outlet pipe, one end of the outer oil channel communicates with the outer oil inlet pipe, and the other end communicates with the outer oil outlet pipe, the temperature-controllable heat-conducting oil heated by the external equipment enters the outer oil channel through the outer oil inlet pipe, flows out of the outer oil channel, and then flows out of the external equipment through the outer oil outlet pipe; the outer oil channel is arranged inside the pipe wall of the tank body and heats the tank body, thereby heating the molten plastic stored in the storage chamber to keep it in a certain molten state.

[0010] As a further scheme of the present application: a plurality of long through holes are arranged inside the pipe wall of the tank body, the plurality of long through holes are uniformly distributed along the circumference of the tank body, the upper ends of adjacent first and second long through holes are sealingly connected by a sealing cover with a channel, thereby keeping the upper ends of the first and second long through holes in a communication state; the lower ends of adjacent second and third long through holes are sealingly connected by a sealing cover with a channel, thereby keeping the lower ends of the second and third long through holes in a communication state; and so on, until all the long through holes are connected to form the outer oil channel.

[0011] As a further scheme of the present application: the temperature control assembly is provided with an inner oil passage, an inner oil inlet pipe and an inner oil outlet pipe, one end of the inner oil passage is communicated with the inner oil inlet pipe, and the other end is communicated with the inner oil outlet pipe, the heat conducting oil of the external equipment enters the inner oil passage through the inner oil inlet pipe, flows through the inner oil passage, and then flows out of the inner oil outlet pipe to the external equipment; the inner oil passage is arranged inside the pipe wall of the tank bottom, thereby heating the tank bottom, and then the heated tank bottom heats the molten plastic in the extrusion channel, so that the molten plastic maintains a certain molten state and is easily extruded and discharged.

[0012] As a further scheme of the present application: the inner oil passage is provided with a first oil passage and a second oil passage, the inner oil inlet pipe is provided with a first oil inlet pipe and a second oil inlet pipe, the inner oil outlet pipe is provided with a first oil outlet pipe and a second oil outlet pipe, one end of the first oil passage is communicated with the first oil inlet pipe, and the other end is communicated with the first oil outlet pipe; one end of the second oil passage is communicated with the second oil inlet pipe, and the other end is communicated with the second oil outlet pipe; the first oil passage is arranged inside the pipe wall on one side of the tank bottom, thereby heating the molten plastic in the extrusion channel on the corresponding side; the second oil passage is arranged inside the pipe wall on the other side of the tank bottom, thereby heating the molten plastic in the extrusion channel on the corresponding other side.

[0013] As a further scheme of the present application: the support assembly is provided with a support cross plate, an extrusion cross plate and a fastening pull rod, one end of the fastening pull rod is fixedly connected with the support cross plate, and the other end is fixedly connected with the extrusion cross plate, so that the support cross plate and the extrusion cross plate are fixedly connected by the fastening pull rod to form a firm support frame; the storage tank is fixedly connected to the support cross plate, and the extrusion assembly is fixedly connected to the extrusion cross plate.

[0014] As a further scheme of the present application: the storage device further comprises a switch assembly, the switch assembly is fixedly connected to the support assembly, and performs closing or opening operation on the extrusion opening of the extrusion channel away from the storage chamber; the support assembly is provided with a switch cross plate and a cushion block, the switch cross plate is arranged on the side of the support cross plate away from the storage tank, and the cushion block is arranged between the switch cross plate and the support cross plate, so that a switch containing space is formed between the switch cross plate and the support cross plate; the switch assembly is provided with a switch sliding block and a switch oil pump, the switch sliding block is slidingly connected in the switch containing space, the switch oil pump is fixedly connected to the support assembly, the piston rod of the switch oil pump is fixedly connected to the switch sliding block, and drives the switch sliding block to slide in the switch containing space, so that the switch sliding block forms a closed state or an open state on the extrusion opening of the extrusion channel.

[0015] Compared with the prior art, the present application has the following advantages:

[0016] 1. By setting the storage tank, the corresponding weight of molten plastic required for the production of large pipes can be stored at one time, and the molten plastic is kept at a certain melting temperature in the storage tank by the temperature control assembly, then the molten plastic is extruded by the extrusion assembly, so that the molten plastic can be quickly and uniformly discharged into the mold cavity, and then uniformly cooled to improve the efficiency and accuracy of cooling, so that the molten plastic is uniformly solidified. In turn, it can improve production efficiency and improve the production quality of large pipes.

[0017] 2. By setting different heating oil circuits in the tank body and tank bottom of the storage tank, the molten plastic in the storage chamber and the extrusion channel is subjected to zoned temperature control, further maintaining the molten state of the molten plastic in the best state, facilitating rapid extrusion of the molten plastic.

[0018] 3. By setting the switch oil pump controlled switch slider, even if the storage chamber is loaded with tons of molten plastic, the extrusion channel can still be smoothly opened or closed quickly, thereby improving production efficiency and accurately controlling the discharge capacity of the molten plastic.

[0019] Therefore, the present application can provide a constant temperature storage device with extrusion function through the above improvements, which stores and controls the temperature of the molten plastic by using a large-capacity storage tank, and then discharges the molten plastic through a one-time rapid and uniform extrusion operation, so that the molten plastic can enter the mold cavity more quickly, thereby speeding up the production efficiency and improving the production quality of large pipes.

[0020] Additional aspects and advantages of the application will be described in part below, some of which will become apparent from the following description, or will be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0022] Figure 1 is a schematic diagram of the overall structure of the present application;

[0023] Figure 2 is a cross-sectional schematic diagram of the storage state of the present application;

[0024] Figure 3 is a cross-sectional schematic diagram of the extrusion state of the present application;

[0025] Figure 4is a sectional view of the switch accommodating space of the present application;

[0026] Figure 5 is a structural view of the connecting column of the present application;

[0027] Figure 6 is a structural view of the extrusion channel of the present application;

[0028] Figure 7 is a visualized view of the long through hole in the can body of the present application;

[0029] Figure 8 is a visualized view of the outer layer oil path of the present application;

[0030] Figure 9 is an exploded view of the inner layer oil path of the present application;

[0031] Figure 10 is a structural view of the switch assembly of the present application;

[0032] Figure 11 is a view of one of the large round tubular plastic products of the present application.

[0033] The reference signs and names in the figures are as follows:

[0034] 10 bracket assembly; 11 support cross plate; 12 extrusion cross plate; 13 fastening pull rod; 14 switch cross plate; 15 pad block; 16 switch accommodating space; 20 extrusion assembly; 21 extrusion oil pump; 22 extrusion piston; 30 storage tank; 31 molten plastic inlet; 32 molten plastic outlet; 33 can body; 34 long through hole; 35 sealing cover; 36 tank bottom; 37 storage chamber; 38 extrusion channel; 39 connecting column; 40 temperature control assembly; 41 outer layer oil path; 42 outer layer oil inlet pipe; 43 outer layer oil outlet pipe; 50 inner layer oil path; 51 first oil path; 52 second oil path; 53 inner layer oil inlet pipe; 54 first oil inlet pipe; 55 second oil inlet pipe; 56 inner layer oil outlet pipe; 57 first oil outlet pipe; 58 second oil outlet pipe; 60 switch assembly; 61 switch slider; 62 switch oil pump; 71 guide groove; 72 inner mold; 73 outer mold; 74 mold cavity. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0036] Please refer to Figures 1 to 11The embodiment of the present application is a constant-temperature storage device with extrusion function, which comprises a support assembly 10, a storage tank 30 and an extrusion assembly 20 fixedly connected to the support assembly 10, the storage tank 30 is used for storing molten plastic, the storage tank 30 is provided with a molten plastic inlet 31, a molten plastic outlet 32 and a temperature control assembly 40, the molten plastic inlet 31 is used for accessing molten plastic from an external device, the molten plastic outlet 32 is used for discharging molten plastic, and the temperature control assembly 40 is used for controlling the temperature of the molten plastic stored in the storage tank 30, so that the molten plastic can maintain a certain molten state; the extrusion assembly 20 is used for applying pressure to the molten plastic stored in the storage tank 30, so that the molten plastic is extruded and discharged from the molten plastic outlet 32.

[0037] Specifically, in the manufacturing process of ordinary size plastic pipe, a traditional screw extruder is usually used to heat plastic particles, then extrude the molten plastic, and discharge the molten plastic into a mold, then perform a cooling operation to cool and shape the molten plastic in the mold, and then open the mold to take out the manufactured plastic pipe. However, the traditional screw extruder is relatively slow in heating plastic particles and extruding molten plastic, which is not conducive to the manufacture of large plastic pipes. Therefore, the present application provides a constant-temperature storage device with extrusion function, which can store the molten plastic discharged by the screw extruder, preferably store all the molten plastic needed to manufacture a large plastic pipe, and continuously heat the molten plastic in the storage tank 30 to maintain a certain temperature and keep it in a good molten state. Then, with the help of the extrusion piston 22, the molten plastic can be quickly injected into the mold cavity 74 of the mold, and then uniformly cooled to quickly cool and shape the molten plastic, completing the manufacturing process of the large plastic pipe.

[0038] Secondly, it is preferred that the molten plastic inlet 31 is directly arranged as an upper opening of the storage tank 30, so that the guide channel 71 of the external screw extruder can discharge the molten plastic into the storage chamber 37 of the storage tank 30. In addition, in order to improve the heating performance of the temperature control assembly 40, it is preferred that high-temperature heat-conducting oil is used in the internal pipeline of the temperature control assembly 40 for temperature conduction, so that the storage tank 30 can maintain the required temperature and can maintain a constant temperature, so that the molten plastic can always maintain a good molten state. Similarly, in order to improve the heating performance of the temperature control assembly 40, it is preferred that the internal pipeline of the temperature control assembly 40 is arranged inside the sidewall of the tank body 33 and the tank bottom 36, so that the degree of heat dissipation to the outside air can be reduced. In order to control the temperature, a corresponding temperature sensor can also be arranged on the external device for heating the high-temperature heat-conducting oil, so that the temperature of the high-temperature heat-conducting oil returned from the temperature control assembly 40 can be monitored, and then the temperature of the molten plastic inside the storage tank 30 can be adjusted by controlling the temperature of the high-temperature heat-conducting oil entering the temperature control assembly 40, so that the molten plastic can always maintain a good molten state.

[0039] Thirdly, the mold can be an existing product in the prior art, and preferably is provided with an inner mold 72 and an outer mold 73, and a mold cavity 74 for manufacturing a large plastic pipe fitting is formed between the inner mold 72 and the outer mold 73. In addition, the mold can also be provided with an upper mold (not shown in the figure), after the molten plastic in the storage tank 30 is discharged into the mold cavity 74 of the mold, the storage tank 30 can be removed, and then the upper mold is moved above the mold and enters the upper part of the mold cavity 74 to press the molten plastic with a certain pressure, so as to compact the molten plastic, and then the entire mold is in a post-mold state. Of course, the specific mold closing operation or mold opening operation production process of the mold is the prior art, which will not be described here.

[0040] As shown in Figures 1 to 6 Preferably, the storage tank 30 is provided with a tank body 33 and a tank bottom 36, the upper part of the tank body 33 and the tank bottom 36 form a storage chamber 37 for storing molten plastic, the lower part of the tank body 33 and the tank bottom 36 form an extrusion channel 38 for extruding and discharging the molten plastic, and the extrusion channel 38 is provided with a connecting column 39, one end of the connecting column 39 is fixedly connected to the tank body 33, and the other end is fixedly connected to the tank bottom 36.

[0041] Specifically, the storage chamber 37 can be set according to the size of the large plastic pipe to be manufactured, and preferably can store all the molten plastic required for the manufacture of a large plastic pipe. The extrusion channel 38 is preferably corresponding to the mold cavity 74 formed in the mold, so that the molten plastic can be directly discharged into the mold cavity 74. The connecting columns 39 can be provided in multiple and uniformly distributed on the circumference of the extrusion channel 38, so as to fix the tank bottom 36 and the tank body 33. In addition, as shown in Figure 6 , the cross section of the connecting column 39 is preferably set as a shuttle shape, so that the molten plastic stored in the storage tank 30 can be smoothly extruded from the extrusion channel 38, without disturbing the molten plastic.

[0042] As shown in Figure 3 and Figure 6 , the tank bottom 36 preferably has a certain thickness, so as to form a cylinder with a certain length, and the extrusion channel 38 formed between the cylinder and the tank body 33 has a certain length; the diameter of one end of the cylinder formed by the tank bottom 36 facing the storage chamber 37 is smaller than the diameter of the other end, so that the opening of the extrusion channel 38 formed between the cylinder and the tank body 33 facing the storage chamber 37 at one end is larger than the opening at the other end, and the molten plastic in the storage chamber 37 can flow into the extrusion channel 38 from the storage chamber 37.

[0043] Specifically, the tank bottom 36 is set to have a certain thickness, that is, to facilitate the use of the connecting column 39 to fix the tank bottom 36 and the tank body 33, and the inner oil passage 50 can also be provided in the tank bottom 36, so that the tank bottom 36 can also be heated, and the molten plastic in contact with the bottom of the storage chamber 37 and the tank bottom 36 can also be heated, and the molten plastic can be continuously heated when passing through the extrusion channel 38, so that the molten plastic can be kept in a good molten state.

[0044] As shown in Figure 1 and Figure 3 , the extrusion assembly 20 is preferably provided with an extrusion oil pump 21 and an extrusion piston 22, the extrusion oil pump 21 is fixedly connected to the support assembly 10, the extrusion piston 22 is fixedly connected to the piston rod of the extrusion oil pump 21, and the extrusion piston 22 abuts against the inner wall of the tank body 33 and forms a sliding connection. The extrusion oil pump 21 drives the piston rod to move downward, so that the piston rod drives the extrusion piston 22 to move synchronously in the direction of the tank bottom 36, and then extrudes the molten plastic stored in the storage chamber 37, so that it is extruded from the extrusion channel 38.

[0045] Specifically, the pressure generated by the extrusion pump 21 driving the extrusion piston 22 on the molten plastic allows the molten plastic to be rapidly extruded from the extrusion channel 38 at the bottom of the storage tank 30, and then directly into the mold, accelerating the extrusion speed of the molten plastic and improving production efficiency. Additionally, it is understood that when the guide channel 71 discharges molten plastic into the storage tank 30, the extrusion piston 22 can move upward under the drive of the piston rod of the extrusion pump 21, thereby opening the upper opening of the storage tank 30, exposing the molten plastic inlet 31, and allowing the molten plastic to enter.

[0046] like Figures 2 to 8 As shown, preferably, the temperature control component 40 is provided with an outer oil passage 41, an outer oil inlet pipe 42, and an outer oil outlet pipe 43. One end of the outer oil passage 41 is connected to the outer oil inlet pipe 42, and the other end is connected to the outer oil outlet pipe 43. The heat transfer oil of the external equipment enters the outer oil passage 41 through the outer oil inlet pipe 42, flows through the outer oil passage 41, and then flows out of the outer oil outlet pipe 43 into the external equipment. The outer oil passage 41 is located inside the pipe wall of the tank body 33, thereby heating the tank body 33, and then heating the molten plastic stored in the storage chamber 37 after the tank body 33 is heated, so as to keep it in a certain molten state.

[0047] Preferably, the inner wall of the tank body 33 is provided with a plurality of elongated through holes 34, which are evenly distributed around the circumference of the tank body 33. The upper ends of adjacent first elongated through holes 34 and second elongated through holes 34 are sealed and connected by a sealing cap 35 with a channel, thereby keeping the upper ends of the first elongated through holes 34 and second elongated through holes 34 in a connected state; the lower ends of adjacent second elongated through holes 34 and third elongated through holes 34 are sealed and connected by a sealing cap 35 with a channel, thereby keeping the lower ends of the second elongated through holes 34 in a connected state; and so on, until all elongated through holes 34 are connected to form the outer oil passage 41.

[0048] Specifically, to prevent the molten plastic entering the storage chamber 37 from cooling down prematurely, an outer oil passage 41 can be installed on the wall of the tank body 33. This allows the molten plastic to be heated by high-temperature heat transfer oil, maintaining it in a good molten state. Furthermore, to reduce heat loss and save costs, multiple elongated holes 34 can be directly formed in the wall of the tank body 33, which has a certain thickness. These holes 34 are parallel to the central axis of the tank body 33 and located inside the side wall of the tank body 33, preferably closer to the storage chamber 37. This improves the heating performance of the molten plastic inside the storage chamber 37 and prevents the heat from the high-temperature heat transfer oil from dissipating into the outside air. Figure 8As shown in the embodiment of the outer layer oil circuit 41, both ends of all the long holes 34 in the tank body 33 are fixedly connected with the sealing cover 35 having a passage, and form an integral communication pipeline. The high-temperature heat conducting oil of the external heating device can enter the outer layer oil circuit 41 from the outer layer oil inlet pipe 42, pass through all the long holes 34 and the passages in the sealing cover 35 in turn, and then be discharged from the outer layer oil outlet pipe 43 and flow back to the external heating device.

[0049] As shown in the embodiment of the outer layer oil circuit 41, both ends of all the long holes 34 in the tank body 33 are fixedly connected with the sealing cover 35 having a passage, and form an integral communication pipeline. The high-temperature heat conducting oil of the external heating device can enter the outer layer oil circuit 41 from the outer layer oil inlet pipe 42, pass through all the long holes 34 and the passages in the sealing cover 35 in turn, and then be discharged from the outer layer oil outlet pipe 43 and flow back to the external heating device. Figures 2 to 9 As shown in the embodiment of the outer layer oil circuit 41, both ends of all the long holes 34 in the tank body 33 are fixedly connected with the sealing cover 35 having a passage, and form an integral communication pipeline. The high-temperature heat conducting oil of the external heating device can enter the outer layer oil circuit 41 from the outer layer oil inlet pipe 42, pass through all the long holes 34 and the passages in the sealing cover 35 in turn, and then be discharged from the outer layer oil outlet pipe 43 and flow back to the external heating device.

[0050] As shown in the embodiment of the outer layer oil circuit 41, both ends of all the long holes 34 in the tank body 33 are fixedly connected with the sealing cover 35 having a passage, and form an integral communication pipeline. The high-temperature heat conducting oil of the external heating device can enter the outer layer oil circuit 41 from the outer layer oil inlet pipe 42, pass through all the long holes 34 and the passages in the sealing cover 35 in turn, and then be discharged from the outer layer oil outlet pipe 43 and flow back to the external heating device.

[0051] As shown in the embodiment of the outer layer oil circuit 41, both ends of all the long holes 34 in the tank body 33 are fixedly connected with the sealing cover 35 having a passage, and form an integral communication pipeline. The high-temperature heat conducting oil of the external heating device can enter the outer layer oil circuit 41 from the outer layer oil inlet pipe 42, pass through all the long holes 34 and the passages in the sealing cover 35 in turn, and then be discharged from the outer layer oil outlet pipe 43 and flow back to the external heating device. Figure 9 As shown in the embodiment of the outer layer oil circuit 41, both ends of all the long holes 34 in the tank body 33 are fixedly connected with the sealing cover 35 having a passage, and form an integral communication pipeline. The high-temperature heat conducting oil of the external heating device can enter the outer layer oil circuit 41 from the outer layer oil inlet pipe 42, pass through all the long holes 34 and the passages in the sealing cover 35 in turn, and then be discharged from the outer layer oil outlet pipe 43 and flow back to the external heating device.

[0052] Specifically, in the outer oil passage 41 of the tank body 33, high-temperature heat transfer oil flows in from an outer inlet pipe 42, then flows through all the outer pipes in sequence, and finally exits from another outer outlet pipe 43. Because the storage chamber 37 inside the tank body 33 is relatively large and stores a large amount of molten plastic, there is no need to consider whether the temperature of the high-temperature heat transfer oil decreases as it passes through the outer pipes. However, in the inner oil passage 50 of the tank bottom 36, because the orifice of the extrusion channel 38 is relatively small, the sidewall of the tank bottom 36 comes into contact with relatively little molten plastic. Therefore, it is necessary to consider that the high-temperature heat transfer oil, after transferring heat to the tank bottom 36 during its flow, may experience a temperature drop, which is not conducive to heating the molten plastic in the latter part of the flow path. In short, this may lead to a decrease in the temperature of the molten plastic in the latter half of the inner oil passage 50.

[0053] Therefore, the inner oil passage 50 can be configured as a multi-segment oil passage, with different inlet and outlet pipes for each segment. This allows the high-temperature heat transfer oil to flow through different oil passages, thereby heating the molten plastic in different areas separately. For example, it can be configured as a first oil passage 51 and a second oil passage 52, with the first oil passage 51 and the second oil passage 52 respectively positioned on two opposing semi-cylinders at the bottom of the tank 36. To illustrate, the cylinder formed by the bottom of the tank 36 can be divided into two semi-cylinders, such as a first semi-cylinder and a second semi-cylinder, with corresponding first oil passages 51 and second oil passages 52 positioned at the arc edges of the first and second semi-cylinders. This configuration allows for a more uniform temperature of the molten plastic inside the extrusion channel 38, ensuring that the molten plastic along the entire circumference of the extrusion channel 38 remains in a well-molten state. It is understandable that the above description of dividing the cylinder formed by the tank bottom 36 into two semi-cylinders on the left and right sides does not actually require setting the tank bottom 36 into two semi-cylinders in a physical sense. Rather, it means that the corresponding first oil passage 51 and second oil passage 52 are set up inside the same tank bottom 36.

[0054] like Figure 1 As shown, preferably, the support assembly 10 is provided with a supporting horizontal plate 11, a pressing horizontal plate 12, and a fastening rod 13. One end of the fastening rod 13 is fixedly connected to the supporting horizontal plate 11, and the other end is fixedly connected to the pressing horizontal plate 12, so that the supporting horizontal plate 11 and the pressing horizontal plate 12 are fixedly connected by the fastening rod 13 to form a solid support frame. The storage tank 30 is fixedly connected to the supporting horizontal plate 11, and the pressing assembly 20 is fixedly connected to the pressing horizontal plate 12.

[0055] Specifically, the extrusion oil pump 21 is fixedly connected to the upper end of the extrusion cross plate 12, and its piston rod passes downward through the extrusion cross plate 12, thereby causing the extrusion piston 22 fixedly connected to the piston rod to extend into the storage tank 30. The storage tank 30 is fixedly connected to the support cross plate 11 and is located between the support cross plate 11 and the extrusion cross plate 12.

[0056] like Figures 1 to 5 As shown, preferably, the storage device further includes a switch assembly 60, which is fixedly connected to the support assembly 10 and performs closing or opening operations on the extrusion opening of the extrusion channel 38 away from the storage chamber 37; the support assembly 10 is provided with a switch horizontal plate 14 and a pad 15, the switch horizontal plate 14 is located on the side of the support horizontal plate 11 facing away from the storage tank 30, and the pad 15 is located between the switch horizontal plate 14 and the support horizontal plate 11, thereby isolating a corresponding switch receiving space 16 between the switch horizontal plate 14 and the support horizontal plate 11; the switch assembly 60 is provided with a switch slider 61 and a switch oil pump 62, the switch slider 61 is slidably connected in the switch receiving space 16, the switch oil pump 62 is fixedly connected to the support assembly 10, and the piston rod of the switch oil pump 62 is fixedly connected to the switch slider 61 and drives the switch slider 61 to slide in the switch receiving space 16, so that the switch slider 61 forms a closed or open state for the extrusion opening of the extrusion channel 38.

[0057] Specifically, both the pad 15 and the switch cross plate 14 are fixedly connected to the bracket assembly 10 by the fastening rod 13. Preferably, the switch slider 61 is controlled by the switch oil pump 62, so even when the storage chamber 37 is loaded with tons of molten plastic, the extrusion channel 38 can be opened or closed smoothly and quickly, thereby improving production efficiency and accurately controlling the discharge capacity of molten plastic. In addition, it is understood that, Figure 10 As shown, in order to enable the switch slider 61 to form a ring shape and thus close the annular molten plastic outlet 32, it is preferable to set four switch sliders 61, and also four switch oil pumps 62. The four switch sliders 61 are respectively arranged on the four sides of the switch horizontal plate 14, and similarly, the four switch oil pumps 62 are also fixedly connected to the four sides of the switch horizontal plate 14, so that when the switch oil pumps 62 drive the switch sliders 61 to slide inward, they can combine to form an annular block and completely close the molten plastic outlet 32.

[0058] In use, first, the plastic particles are melted by the screw extruder, then the melted plastic is formed and discharged into the storage chamber 37 of the storage tank 30, at this time, the external heating device provides high-temperature heat conduction oil to the temperature control assembly 40, so that the high-temperature heat conduction oil flows in the outer oil channel 41 and the inner oil channel 50, thereby heating the tank body 33 and the tank bottom 36. Then the tank body 33 and the tank bottom 36 conduct heat to the melted plastic in the storage chamber 37, so that the melted plastic maintains a certain temperature and maintains a good melting state.

[0059] When the required melted plastic is discharged into the storage chamber 37, the extrusion oil pump 21 of the extrusion assembly 20 starts to operate, drives the extrusion piston 22 to enter the storage chamber 37 of the storage tank 30, and performs extrusion operation on the melted plastic in the storage chamber 37. At the same time, the switch assembly 60 can be opened, so that the switch oil pump 62 drives the switch slider 61 to slide outward, so that the melted plastic outlet 32 of the storage tank 30 is opened, and then the melted plastic in a molten state is quickly discharged into the mold cavity 74 of the mold after being extruded.

[0060] After the melted plastic is discharged, the storage device can be removed, then the upper mold in the mold is moved to a predetermined position above the mold cavity 74, and then the melted plastic in the mold cavity 74 is extruded by the upper mold, then the mold after closing is cooled and formed, and after the melted plastic is solidified and formed, the mold is opened, and the large plastic pipe fitting after production is taken out. It can be understood that while the mold is being cooled and formed, the storage tank 30 that has been emptied can be moved to the guide groove 71 of the screw extruder again to access the melted plastic required for the next production, so as to speed up the production process and improve the production efficiency.

[0061] It is obvious to those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and scope of the equivalent elements of the claims.

Claims

1. A constant-temperature storage device with extrusion function, characterized in that, The system includes a support assembly (10), a storage tank (30) and an extrusion assembly (20) fixedly connected to the support assembly (10). The storage tank (30) is used to store molten plastic. The storage tank (30) is provided with a molten plastic inlet (31), a molten plastic outlet (32), and a temperature control assembly (40). The molten plastic inlet (31) is used to receive molten plastic from an external device. The molten plastic outlet (32) is used to discharge molten plastic. The temperature control assembly (40) is used to control the temperature of the molten plastic stored in the storage tank (30) to maintain the molten plastic at a melting temperature. The extrusion assembly (20) is used to apply pressure to the molten plastic, thereby extruding the molten plastic from the molten plastic outlet (32). The storage tank (30) is provided with a tank body (33) and a tank bottom (36). A storage chamber (37) is formed between the upper part of the tank body (33) and the tank bottom (36), and the storage chamber (37) is used to store molten plastic. An extrusion channel (38) is formed between the lower part of the tank body (33) and the tank bottom (36), and the extrusion channel (38) is used to discharge molten plastic. A connecting column (39) is provided in the extrusion channel (38), one end of the connecting column (39) is fixedly connected to the tank body (33), and the other end is fixedly connected to the tank bottom (36). The temperature control component (40) is provided with an outer oil passage (41), an outer oil inlet pipe (42), and an outer oil outlet pipe (43). One end of the outer oil passage (41) is connected to the outer oil inlet pipe (42), and the other end is connected to the outer oil outlet pipe (43). The heat transfer oil of the external equipment enters the outer oil passage (41) through the outer oil inlet pipe (42), flows through the outer oil passage (41), and then flows out into the external equipment through the outer oil outlet pipe (43). The outer oil passage (41) is located inside the pipe wall of the tank body (33) and heats the tank body (33). The heated tank body (33) then heats the molten plastic stored in the storage chamber (37) to keep it in a certain molten state. The inner wall of the tank body (33) is provided with multiple elongated through holes (34), which are evenly distributed around the circumference of the tank body (33). The upper ends of adjacent first elongated through holes (34) and second elongated through holes (34) are sealed and connected by a sealing cap (35) with a channel, so that the upper ends of the first elongated through holes (34) and second elongated through holes (34) remain in communication. The lower ends of adjacent second elongated through holes (34) and third elongated through holes (34) are sealed and connected by a sealing cap (35) with a channel, so that the lower ends of the second elongated through holes (34) and third elongated through holes (34) remain in communication. This process continues until all elongated through holes (34) are connected to form the outer oil passage (41). The storage device also includes a switch assembly (60), which is fixedly connected to the support assembly (10) and performs closing or opening operations on the extrusion opening at the end of the extrusion channel (38) away from the storage chamber (37). The support assembly (10) is provided with a switch plate (14) and a pad (15). The switch plate (14) is located on the side of the support plate (11) facing away from the storage tank (30), and the pad (15) is located between the switch plate (14) and the support plate (11), thereby allowing the switch plate (14) and the support plate (11) to move together. A switch receiving space (16) is formed between the two; the switch assembly (60) is provided with a switch slider (61) and a switch oil pump (62). The switch slider (61) is slidably connected in the switch receiving space (16). The switch oil pump (62) is fixedly connected to the bracket assembly (10). The piston rod of the switch oil pump (62) is fixedly connected to the switch slider (61) and drives the switch slider (61) to slide in the switch receiving space (16), so that the switch slider (61) forms a closed state or an open state for the extrusion opening of the extrusion channel (38).

2. The constant temperature storage device with extrusion function according to claim 1, characterized in that, The bottom of the tank (36) is configured to have a certain thickness, thereby forming a cylinder of a certain length, which in turn makes the extrusion channel (38) formed between the cylinder and the tank body (33) have a certain length; the diameter of the end of the cylinder formed by the bottom of the tank (36) facing the storage chamber (37) is smaller than the diameter of the other end, so that the opening of the end of the extrusion channel (38) formed between the cylinder and the tank body (33) facing the storage chamber (37) is larger than the opening of the other end, thereby making it easier for the molten plastic in the storage chamber (37) to flow from the storage chamber (37) into the extrusion channel (38).

3. The constant temperature storage device with extrusion function according to claim 1, characterized in that, The extrusion assembly (20) is equipped with an extrusion oil pump (21) and an extrusion piston (22). The extrusion oil pump (21) is fixedly connected to the support assembly (10), and the extrusion piston (22) is fixedly connected to the piston rod of the extrusion oil pump (21). The extrusion piston (22) abuts against the inner wall of the tank body (33) and forms a sliding connection. The extrusion oil pump (21) drives the piston rod to move downward, thereby causing the piston rod to drive the extrusion piston (22) to move synchronously towards the bottom of the tank (36), thereby forming an extrusion action on the molten plastic stored in the storage chamber (37), so that it is extruded from the extrusion channel (38).

4. The constant temperature storage device with extrusion function according to claim 1, characterized in that, The temperature control component (40) is provided with an inner oil passage (50), an inner oil inlet pipe (53) and an inner oil outlet pipe (56). One end of the inner oil passage (50) is connected to the inner oil inlet pipe (53), and the other end is connected to the inner oil outlet pipe (56). The heat transfer oil of the external equipment enters the inner oil passage (50) through the inner oil inlet pipe (53), flows through the inner oil passage (50), and then flows out to the external equipment through the inner oil outlet pipe (56). The inner oil passage (50) is located inside the pipe wall of the tank bottom (36), thereby heating the tank bottom (36), and then heating the molten plastic in the extrusion channel (38) after the tank bottom (36) is heated, so that it maintains a certain molten state and is easy to be extruded.

5. A constant temperature storage device with extrusion function according to claim 4, characterized in that, The inner oil passage (50) is provided with a first oil passage (51) and a second oil passage (52). The inner oil inlet pipe (53) is provided with a first oil inlet pipe (54) and a second oil inlet pipe (55). The inner oil outlet pipe (56) is provided with a first oil outlet pipe (57) and a second oil outlet pipe (58). One end of the first oil passage (51) is connected to the first oil inlet pipe (54), and the other end is connected to the first oil outlet pipe (57). One end of the second oil passage (52) is connected to the second oil inlet pipe (55), and the other end is connected to the second oil outlet pipe (58). The first oil passage (51) is located inside the pipe wall on one side of the tank bottom (36), thereby heating the molten plastic in the extrusion channel (38) on the corresponding side. The second oil passage (52) is located inside the pipe wall on the other side of the tank bottom (36), thereby heating the molten plastic in the extrusion channel (38) on the corresponding other side.

6. A constant temperature storage device with extrusion function according to claim 1, characterized in that, The support assembly (10) is provided with a support plate (11), a pressing plate (12) and a fastening rod (13). One end of the fastening rod (13) is fixedly connected to the support plate (11), and the other end is fixedly connected to the pressing plate (12), so that the support plate (11) and the pressing plate (12) are fixedly connected by the fastening rod (13) to form a solid support frame. The storage tank (30) is fixedly connected to the support plate (11), and the pressing assembly (20) is fixedly connected to the pressing plate (12).

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