A plastic pipe preparation system and application method thereof

Abstract

The present invention relates to the technical field of plastic product preparation, and proposes a plastic tube preparation system and an application method thereof, including an extruder and a vacuum machine, wherein a traction tube is arranged in the vacuum machine; further comprising a bracket, a first displacement mechanism, a second displacement mechanism and a heating assembly, wherein two brackets are arranged relatively, and heating assemblies are arranged on both brackets; the first displacement mechanism is used to drive the two brackets to open and close relatively; the second displacement mechanism is used to drive the first displacement mechanism, the bracket and the heating assembly to move back and forth between the extruder and the vacuum machine, so as to dock the blank to the traction tube. In the present invention, the first displacement mechanism can drive the bracket and the heating assembly to open and close, so that the traction tube can be heated by the heating assembly, and after the bracket carries the blank, the blank can be transported to the traction tube to realize the combination of the blank and the traction tube, so that it is convenient to use the traction tube to transfer the blank to the vacuum machine, which improves the transfer rate of the blank to the vacuum machine.

Description

Technical Field

[0001] The invention relates to the technical field of plastic product preparation, and in particular to a plastic pipe preparation system and an application method thereof. Background Art

[0002] Extruder processing of plastics is a common plastic molding process, which is widely used in the manufacture of various plastic products, such as pipes, plates, films, profiles, etc. The extruder mainly heats the raw materials in the form of granules or powders, mixes them, extrude them through the extruder head, and then enters the mold for molding. Usually, a cooling system is also used to shape the extruded plastic parts to ensure the stability of the product size and shape.

[0003] The invention patent with the existing authorization announcement number CN101076443B discloses a device for calibrating extruded plastic profiles, which has a forming extrusion die and a frame movable relative to the extrusion die in the longitudinal direction of the plastic profile, the frame having a cooling box and a drying calibrator between the cooling box and the extrusion die, the drying calibrator being connected to a carrier in a replaceable manner and being connectable to a supply pipe, which is used for supplying and discharging a coolant on the one hand and for local vacuum on the other hand.

[0004] As shown in the above scheme, it discloses a conventional preparation device for plastic products, namely, a forming extrusion die and a cooling box. In the current preparation of plastic pipes, the material is mainly extruded by an extruder, and then sent to the vacuum machine cavity to shape the blank, and then cooled. There are currently two main ways for materials to enter the vacuum machine. One is to directly send the output material into the vacuum machine, and the other is to set a traction tube in the vacuum machine, and then after the material is connected to the traction tube, the traction tube is used to pull the material into the vacuum machine;

[0005] In the operation mode of directly sending the output material into the vacuum machine, the front end of the embryo is not well shaped, which will cause a lot of waste. There are two main methods when using a traction tube. One is to set a hook at the end of the traction tube and use the hook to hang the front end of the embryo extruded by the extruder. This traction method is easy to cause the front end of the embryo to crack, resulting in traction failure, and the embryo cannot enter the vacuum machine; the other method is to heat the front end of the traction tube until the embryo adheres to the traction tube and is not easy to fall off; but this method is mainly to remove the front end of the embryo when the extruder extrudes the material, and then place it on the traction tube for heating. This operation needs to be repeated many times to make the temperature of the traction tube reach a level that the embryo is not easy to fall off. This method is time-consuming and labor-intensive to operate, and will cause a lot of material waste;

[0006] Therefore, an efficient measure is needed for the transportation of extruded materials between the extruder and the vacuum machine. Summary of the invention

[0007] In view of this, the present invention proposes a plastic tube preparation system and an application method that can quickly realize the extrusion material transportation to ensure that the material blank can dock with the traction tube and enter the vacuum machine, so as to solve the problems of time-consuming and labor-intensive operation and high material waste in the extrusion material transportation process between the existing extruder and the vacuum machine.

[0008] The technical solution of the present invention is achieved in this way:

[0009] In one aspect, the present invention provides a plastic pipe preparation system, comprising an extruder and a vacuum machine, wherein the discharge port of the extruder is arranged opposite to the feed port of the vacuum machine, and a traction pipe is arranged in the vacuum machine;

[0010] It also includes a bracket, a first displacement mechanism, a second displacement mechanism and a heating component, wherein:

[0011] Two brackets are arranged opposite to each other, and heating components are arranged on both brackets. The brackets are used to support the material embryo extruded by the extruder, and the heating components are used to heat the traction tube.

[0012] The first displacement mechanism is used to drive the two brackets to open and close relative to each other;

[0013] The second displacement mechanism is used to drive the first displacement mechanism, the bracket and the heating component to move back and forth between the extruder and the vacuum machine to dock the blank onto the traction tube.

[0014] On the basis of the above technical solution, preferably, the bracket includes a connecting pipe, a support plate and a first air supply pipe, wherein:

[0015] The connecting pipe is connected to the movable end of the first displacement mechanism;

[0016] The support plate is arranged on the side of the connecting tube facing the extruder, and a plurality of the support plates are arranged in an arc-shaped array. The support plate is a hollow structure and is connected to the connecting tube, and a first through hole is opened on the surface of the support plate;

[0017] The first air supply pipe is arranged on one side of the connecting pipe, and the first air supply pipe is communicated with the connecting pipe, and the first air supply pipe is used for supplying hot air.

[0018] On the basis of the above technical solution, preferably, the heating assembly is an electric heating plate, and one electric heating plate is provided on each inner side of the two connecting pipes;

[0019] The electric heating plate is in a semicircular ring structure. Driven by the first displacement mechanism, the two electric heating plates form a heating component with a full circular ring structure, or are separated into a single semicircular ring plate structure.

[0020] On the basis of the above technical solution, preferably, the connecting pipe includes an inner pipe and an outer pipe, wherein:

[0021] The cross sections of the inner tube and the outer tube are both semicircular structures, and the inner tube and the outer tube are spliced ​​into a semicircular ring structure with a full circle cross section;

[0022] A plurality of second through holes are formed on a side of the inner tube away from the outer tube;

[0023] The support plate is connected to and penetrates the outer tube;

[0024] The inner tube is a heating component, and the two inner tubes form a heating component with a full circular ring structure.

[0025] On the basis of the above technical solution, preferably, it further comprises a first shaping mechanism, the first shaping mechanism comprises a limit rod, a connecting plate and a first shaping plate, wherein:

[0026] The limiting rod is arranged on the connecting pipe, and the limiting rod is parallel to the first air supply pipe;

[0027] One end of the connecting plate is sleeved on the first air supply pipe and the limiting rod and is fastened by a nut;

[0028] The first molding plate is arranged on the other end of the connecting plate, the first molding plate is in an arc-shaped plate structure, and the end of the first molding plate is folded to form a chamfered portion, so that the central angle of the first molding plate is less than 180°;

[0029] The two brackets are both provided with a first shaping mechanism.

[0030] On the basis of the above technical solution, preferably, it further comprises a second shaping mechanism, the second shaping mechanism comprises a cylinder, a push rod and a second shaping plate, wherein:

[0031] The cylinder body is hinged on the vacuum machine;

[0032] One end of the push rod is hinged to the piston rod of the cylinder, and the middle section of the push rod is hinged to the vacuum machine;

[0033] The second molding plate is arranged on the other end of the push rod, and the structure of the second molding plate is the same as that of the first molding plate;

[0034] Two second molding mechanisms are arranged on the vacuum machine, and the opening and closing directions of the two second molding plates are perpendicular to the opening and closing directions of the two first molding plates.

[0035] On the basis of the above technical solution, preferably, the first displacement mechanism includes a base, a slide plate and a bidirectional telescopic cylinder, wherein:

[0036] The base is arranged on the movable end of the second displacement mechanism, and two parallel sliding grooves are provided on the base;

[0037] Two slide plates are arranged in each of the two slide grooves, wherein the two slide plates in one slide groove are each connected to a bracket, and the two slide plates in the other slide groove are each connected to a first molding plate;

[0038] The bidirectional telescopic cylinder is arranged on the base, one end of the bidirectional telescopic cylinder is connected to two slide plates located on the same side of the two slide grooves, and the other end of the bidirectional telescopic cylinder is connected to the other two slide plates.

[0039] On the basis of the above technical solution, preferably, it further comprises a guide ring, the guide ring comprises four half ring bodies and at least two connecting rods, wherein:

[0040] The four half rings form two full rings, and the two full rings are located oppositely on two sides of the heating component;

[0041] The two connecting rods are both arranged on the heating assembly, and the two ends of the two connecting rods are respectively connected to a semi-ring body;

[0042] The inner diameter of the whole ring is smaller than the inner diameter of the heating component constituting the whole circular ring structure, and the relatively far sides of the two whole rings are flared structures.

[0043] On the basis of the above technical solution, preferably, the guide ring further includes a second air supply pipe, and the semi-ring body and the connecting rod are both hollow structures and interpenetrate each other;

[0044] A third through hole is formed at the expanded end of the semi-ring body;

[0045] The second air supply pipe is connected to and penetrates the connecting rod, and the second air supply pipe is used for supplying cooling air flow.

[0046] In another aspect, the present invention provides an application method of the above-mentioned plastic pipe preparation system, comprising the following steps:

[0047] S1, the first displacement mechanism drives the two brackets to open relatively, and the second displacement mechanism drives the first displacement mechanism and the bracket to approach the vacuum machine;

[0048] S2, the first displacement mechanism drives the two brackets to move relatively close together, and heats the traction tube through the heating component;

[0049] S3, the extruder starts to discharge material, at this time, clean up the defective material output from the front end;

[0050] S4, the first displacement mechanism drives the two brackets to move closer together, and the second displacement mechanism drives the first displacement mechanism and the bracket to move closer to the extruder;

[0051] S5. The blank output by the extruder is sleeved on the bracket;

[0052] S6, the second displacement mechanism maintains the discharging speed, drives the first displacement mechanism and the bracket to approach the vacuum machine, so as to sleeve the end of the embryo onto the traction tube;

[0053] S7, increasing the moving speed of the second displacement mechanism to make the bracket come out from between the traction tube and the blank, and at this time, the end of the blank is bonded and fixed to the end of the traction tube;

[0054] S8. The extruder continues to discharge the material, and the embryo is pulled into the vacuum machine through the pulling tube to shape the embryo.

[0055] The plastic pipe preparation system and application method of the present invention have the following beneficial effects compared with the prior art:

[0056] (1) By setting a second displacement mechanism between the vacuum machine and the extruder, it can drive the bracket and the traction component to move back and forth, and the first displacement mechanism can drive the bracket and the heating component to open and close, so that the traction tube can be heated by the heating component, and after the bracket carries the embryo, the embryo can be transported to the traction tube to achieve the combination of the embryo and the traction tube, so that the embryo can be conveniently transferred to the vacuum machine using the traction tube, which improves the transfer rate of the embryo to the vacuum machine, and there is no need to use the material to repeatedly heat the traction tube, thereby reducing the waste of material;

[0057] (2) In the preparation system, the bracket supports the embryo through the support plate. The support plate is a hollow structure and has a first through hole. When air is supplied to the support plate, the support plate can be quickly separated from the embryo to avoid the problem of the embryo sticking to the support plate.

[0058] (3) By setting up the first shaping mechanism, it can apply pressure to the end of the blank to bond the blank to the traction tube, ensure that the blank is well combined with the traction tube, and prevent the blank from falling off during the conveying process, which has the advantage of stable application; at the same time, the end of the first shaping plate of the first shaping mechanism is provided with a chamfered portion, which can avoid the problem that the first shaping plate punctures the squeezed part of the blank after the blank is squeezed, thereby preventing the blank from bonding to the first shaping plate;

[0059] (4) By arranging a second molding mechanism on the vacuum machine, the second molding plate can pressurize the part not squeezed by the first molding plate, so as to improve the stability of the combination between the blank and the traction tube;

[0060] (5) By providing a guide ring, after the blank is bonded to the traction tube, the guide ring is merged by the first displacement mechanism, so that the blank can be supported and the diameter of the blank can be reduced, so that the blank can enter the vacuum machine better and prevent the blank from touching the bonding heating component;

[0061] (6) By setting the semi-ring body and the connecting rod of the guide ring as a hollow structure, and opening a third through hole on the semi-ring body, the material embryo can be initially cooled after the cooling air flow is supplied, and the plasticity of the material embryo can be appropriately reduced, so as to reduce the possibility of damage to the material embryo when entering the vacuum machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0063] Figure 1 A perspective view of a plastic pipe preparation system of the present invention;

[0064] Figure 2 It is a front view of the plastic pipe preparation system of the present invention;

[0065] Figure 3 A three-dimensional diagram of a first displacement mechanism and a bracket of a plastic pipe preparation system of the present invention;

[0066] Figure 4 For the present invention Figure 3 A magnified view of the structure at point A;

[0067] Figure 5 A partial stereoscopic diagram of a first displacement mechanism of the plastic pipe preparation system of the present invention;

[0068] Figure 6 A perspective view of a support of the plastic pipe preparation system of the present invention as a heating component;

[0069] Figure 7 A three-dimensional diagram of the guide ring assembly structure of the plastic pipe preparation system of the present invention;

[0070] Figure 8 A three-dimensional diagram of a half ring body and a connecting rod of a plastic pipe preparation system of the present invention;

[0071] Fig. 9 A perspective view of a guide ring of the plastic pipe preparation system of the present invention provided with a second air supply pipe;

[0072] Fig.10 is an initial state diagram of the plastic pipe preparation system of the present invention;

[0073] Fig.11 A heating state diagram of the plastic pipe preparation system of the present invention;

[0074] Fig.12A state diagram of a supporting material embryo of a plastic pipe preparation system of the present invention;

[0075] Fig.13 This is a diagram of the plastic pipe preparation system of the present invention when the blank is pulled into place;

[0076] Fig.14 This is a diagram showing a state where a support of the plastic pipe preparation system of the present invention is separated from a blank;

[0077] Fig.15 This is a diagram of the initial state of the preform molding of the plastic pipe preparation system of the present invention;

[0078] In the figure: 1. extruder; 2. vacuum machine; 3. bracket; 31. connecting pipe; 311. inner pipe; 312. outer pipe; 32. support plate; 33. first air supply pipe; 301. first through hole; 302. second through hole; 4. first displacement mechanism; 41. base; 42. slide plate; 43. two-way telescopic cylinder; 401. slide groove; 5. second displacement mechanism; 6. electric heating plate; 7. first molding mechanism; 71. limit rod; 72. connecting plate; 73. first molding plate; 701. chamfering part; 8. second molding mechanism; 81. cylinder; 82. push rod; 83. second molding plate; 9. guide ring; 91. semi-ring body; 92. connecting rod; 93. second air supply pipe; 901. third through hole; 100. traction tube; 200. embryo. DETAILED DESCRIPTION

[0079] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0080] like Figures 1 to 15 As shown, the plastic pipe preparation system of the present invention includes an extruder 1, a vacuum machine 2 support 3, a first displacement mechanism 4, a second displacement mechanism 5, an electric heating plate 6, a first molding mechanism 7, a second molding mechanism 8 and a guide ring 9, which is used to transport the embryo 200 extruded by the extruder 1 so that the embryo 200 can be docked to the traction tube 100 on the vacuum machine 2, thereby facilitating the traction tube 100 to introduce the embryo 200 into the vacuum machine 2 for molding, thereby solving the problem that the existing docking work is manually operated by production personnel and the process is time-consuming and labor-intensive.

[0081] like Figure 1 and Figure 2 As shown, the discharge port of the extruder 1 is arranged opposite to the feed port of the vacuum machine 2, and a traction tube 100 is arranged in the vacuum machine 2;

[0082] As in the above structure, after the material embryo 200 is extruded through the discharge port by the extruder 1, the material embryo 200 needs to be connected to the traction tube 100, so as to pull the material embryo 200 into the vacuum machine;

[0083] like Figures 1 to 5 As shown, two brackets 3 are arranged opposite to each other, and heating components are arranged on both brackets 3. The brackets 3 are used to support the blank 200 extruded by the extruder 1, and the heating components are used to heat the traction tube 100.

[0084] As in the above structure, when the material embryo 200 is docked with the traction tube 100, the material embryo 200 extruded by the extruder 1 is in a tubular structure. At this time, the material embryo 200 can be supported by the bracket 3 to facilitate the subsequent sleeve installation on the traction tube 100;

[0085] Preferably, before supporting, the traction tube 100 is heated by a heating assembly to achieve a degree that the blank 200 can adhere to the traction tube 100 and is not easy to fall off.

[0086] like Figure 4 and Figure 5 As shown, the first displacement mechanism 4 is used to drive the two brackets 3 to open and close relative to each other;

[0087] The second displacement mechanism 5 is used to drive the first displacement mechanism 4, the bracket 3 and the heating assembly to move back and forth between the extruder 1 and the vacuum machine 2 to dock the blank 200 onto the traction tube 100;

[0088] like Fig.10 As shown, before the blank 200 is docked with the traction tube 100, the second displacement mechanism 5 first drives the bracket 3 and the heating assembly to approach the traction tube 100. In the initial state, the two brackets 3 are relatively separated under the drive of the first displacement mechanism 4.

[0089] like Fig.11 As shown, after the heating assembly on the bracket 3 corresponds to the end of the traction tube 100, the first displacement mechanism 4 drives the two brackets 3 and the heating assembly to move together, so that the traction tube 100 is heated by the heating assembly;

[0090] Specifically, the heating component may be an electric heating plate 6 arranged on the bracket 3;

[0091] like Fig.12 As shown, after the traction tube 100 is heated, the second displacement mechanism 5 drives the bracket 3 to approach the extruder 1. After the extruder 1 extrude the tubular material embryo 200, the bracket 3 will support the material embryo 200.

[0092] like Fig.13 As shown, the second displacement mechanism 5 then maintains the discharging speed to pull the blank 200 onto the traction tube 100 until the blank 200 is partially sleeved on the traction tube 100;

[0093] like Fig.14 As shown, the second displacement mechanism 5 then accelerates the displacement speed to allow the bracket 3 to detach from the blank 200. At this time, the blank 200 is overlapped on the traction tube 100. Then the first displacement mechanism 4 drives the two brackets 3 to separate relatively. In this way, driven by the traction tube 100, the blank 200 can enter the vacuum machine 2.

[0094] Specifically, in this solution, the first displacement mechanism 4 and the second displacement mechanism 5 use linear displacement driving components, such as linear guide rails, telescopic cylinders, electric push rods and other components.

[0095] Of course, in some embodiments, a crank connecting rod or other mechanism may also be used to control the opening and closing of the bracket 3 .

[0096] like Figure 3 As shown, the bracket 3 includes a connecting tube 31, a support plate 32 and a first air supply pipe 33, wherein the connecting tube 31 is connected to the movable end of the first displacement mechanism 4; the support plate 32 is arranged on the side of the connecting tube 31 facing the extruder 1, and a plurality of support plates 32 are arranged in an arc-shaped array, the support plate 32 is a hollow structure, and is connected to the connecting tube 31, and a first through hole 301 is opened on the surface of the support plate 32; the first air supply pipe 33 is arranged on one side of the connecting tube 31, and the first air supply pipe 33 is connected to the connecting tube 31, and the first air supply pipe 33 is used to supply hot air;

[0097] As in the above structure, when the material embryo 200 is supported, it is supported by the support plate 32 on the bracket 3. By arranging the support plates 32 in an arc array on the two brackets 3, the material embryo 200 can be well supported;

[0098] After the material blank 200 is docked onto the traction tube 100, in order to facilitate the support plate 32 to be removed from between the material blank 200 and the traction tube 100, a first air supply pipe 33 is provided to supply air to the support plate 32, so that after the air flow is ejected through the first through hole 301, the material blank 200 can be separated from the traction tube 100 to prevent adhesion. Then, the second displacement mechanism 5 accelerates the moving speed to drive the bracket 3 to move, so as to remove the support plate 32 from between the material blank 200 and the traction tube 100.

[0099] In order to prevent the problem that the airflow causes the plasticity of the blank 200 to be reduced and cannot be well bonded with the traction tube 100, preferably, the first air supply pipe 33 supplies hot air.

[0100] In the present technical solution, since a heating component is provided to heat the traction tube 100, the first air supply pipe 33 may not supply hot air, and it can be directly connected to an air compressor or a fan to supply air, temporarily separating the airflow required for the process, and the resulting cooling effect has less impact on the blank 200 and the traction tube 100.

[0101] For the heating components of the plastic pipe preparation system, two solutions are proposed in the application:

[0102] First, if Figures 1 to 3 As shown, the heating component is an electric heating plate 6, and one electric heating plate 6 is provided on each inner side of the two connecting pipes 31; the electric heating plate 6 is a semicircular ring structure, and driven by the first displacement mechanism 4, the two electric heating plates 6 form a heating component with a full circular ring structure, or are separated into a single semicircular ring plate structure;

[0103] As described above, in this solution, an electric heating plate 6 is provided as a heating component, and the two electric heating plates 6 are in a semicircular ring structure, so that they can move with the bracket 3 to form a full-circular ring structure, thereby facilitating heating of the end of the traction tube 100.

[0104] Second, if Figure 6 As shown, the connecting pipe 31 includes an inner pipe 311 and an outer pipe 312, wherein the inner pipe 311 is a heating component, wherein the cross-sections of the inner pipe 311 and the outer pipe 312 are both semicircular structures, and the inner pipe 311 and the outer pipe 312 are spliced ​​into a semicircular ring structure with a full-circular cross-section; a plurality of second through holes 302 are opened on one side of the inner pipe 311 away from the outer pipe 312;

[0105] In such a structure, the inner tube 311 is provided with a separate air supply pipeline, and the air supply pipeline is used to supply hot air. In this way, when heating, the electric heating plate 6 may not be provided, but the hot air is blown out through the second through hole 302 of the inner tube 311 to purge the end of the traction tube 100, thereby achieving heating of the traction tube 100;

[0106] The two connecting tubes 31 have two inner tubes 311, and the two inner tubes 311 form a heating assembly with a full-circle structure, so as to facilitate heating of the traction tube 100 throughout the entire circumference;

[0107] In this structure, the support plate 32 is connected to and interpenetrates with the outer tube 312 , and the outer tube 312 is supplied with air through the first air supply pipe 33 .

[0108] like Figure 3 and Figure 4As shown, the two brackets 3 are each provided with a first molding mechanism 7, and the first molding mechanism 7 includes a limiting rod 71, a connecting plate 72 and a first molding plate 73, wherein the limiting rod 71 is arranged on the connecting pipe 31, and the limiting rod 71 is parallel to the first air supply pipe 33; one end of the connecting plate 72 is sleeved on the first air supply pipe 33 and the limiting rod 71, and fastened by a nut; the first molding plate 73 is arranged on the other end of the connecting plate 72, and the first molding plate 73 is an arc-shaped plate-like structure.

[0109] As in the above structure, in the first molding mechanism 7, the first molding plate 73 is connected to the first air supply pipe 33 and the limit rod 71 through the connecting plate 72, and is locked and fixed by a nut. In this way, when the two brackets 3 are opened and closed, the two first molding plates 73 are also opened and closed, so that the blank 200 can be pressed onto the traction tube 100 through the first molding plate 73 to ensure the stability of the connection between the blank 200 and the traction tube 100.

[0110] Furthermore, the end of the first molding plate 73 is folded to form a chamfered portion 701, so that the central angle of the first molding plate 73 is less than 180°;

[0111] As shown in the above structure, since the first molding plate 73 extrude the blank 200 from both sides, in order to prevent the end of the first molding plate 73 from piercing the extruded protruding part of the blank 200, a chamfered portion 701 is provided at the end of the first molding plate 73, and the central angle of the first molding plate 73 is controlled to be less than 180°, so as to prevent the ends of the two first molding plates 73 from butting against each other to extrude the blank 200.

[0112] like Fig.15 As shown, after the first displacement mechanism 4 drives the two brackets 3 to be relatively separated, the second displacement mechanism 5 drives the bracket 3 to move toward the extruder 1, so that the first molding mechanism 7 corresponds to the part where the traction tube 100 and the blank 200 are sleeved, and the first displacement mechanism 4 drives the two brackets 3 and the two first molding plates 73 together, so as to extrude the blank 200 through the first molding plates 73, and assist in bonding the traction tube 100.

[0113] Specifically, after the two brackets 3 and the two first molding mechanisms 7 are brought together, the brackets 3, the electric heating plate 6 and the first molding plate 73 are all in an annular structure. At this time, the inner diameters of the two electric heating plates 6 should be appropriately larger than the inner diameters of the two first molding plates 73 to prevent the blank 200 from contacting the electric heating plate 6 during the process of crimping the blank 200 onto the traction tube 100.

[0114] Of course, when the electric heating plate 6 has a high cooling rate, since the blank 200 has a plastic shape, the inner diameter of the electric heating plate 6 can also be the same as the inner diameter of the first plastic plate 73, and the cooled electric heating plate 6 will not adhere to the blank 200.

[0115] like Figures 7-9 As shown, the guide ring 9 includes four half ring bodies 91 and at least two connecting rods 92, wherein the four half ring bodies 91 form two full rings, and the two full rings are relatively located on both sides of the heating component; the two connecting rods 92 are both arranged on the heating component, and the two ends of the two connecting rods 92 are respectively connected to a half ring body 91; the inner diameter of the full ring is smaller than the inner diameter of the heating component forming the full circular ring structure, and the relatively far sides of the two full rings are flared structures;

[0116] As in the above structure, in some embodiments, a guide ring 9 is provided, and the inner diameter of the entire ring in the guide ring 9 is smaller than the inner diameter of the heating component constituting the entire circular ring structure, so that after the two brackets 3 are closed, the guide ring 9 will support the blank 200 to prevent the heating component from contacting the blank 200;

[0117] At the same time, in order to facilitate the passage of the blank 200, the side of the whole ring is set to a flared structure to facilitate the guidance of the blank 200 for continued transportation. The inner diameter of the whole ring can be set to be the same as the inner diameter of the two first molding plates 73. In this way, the guide ring 9 can have a diameter reduction effect, which is beneficial to guide the blank 200 into the vacuum machine 2.

[0118] Furthermore, the guide ring 9 further includes a second air supply pipe 93. The semi-ring body 91 and the connecting rod 92 are both hollow structures and are interconnected. A third through hole 901 is provided at the expanded end of the semi-ring body 91. The second air supply pipe 93 is connected to and is interconnected with the connecting rod 92. The second air supply pipe 93 is used to supply cooling airflow.

[0119] As in the above structure, by providing the second air supply pipe 93 for supplying air to the semi-ring body 91 and spraying air through the third through hole 901, the air flotation effect can be achieved to a certain extent to prevent the blank 200 from adhering to the guide ring 9, and at the same time, the temperature of the blank 200 can be initially reduced, so that the blank 200 can be cooled and shaped faster in the subsequent process;

[0120] According to different requirements of extrusion temperature and molding temperature, the second air supply pipe 93 can selectively adjust the air supply temperature, for example, supply hot air.

[0121] like Figure 2 As shown, the second molding mechanism 8 includes a cylinder 81, a push rod 82 and a second molding plate 83, wherein the cylinder body of the cylinder 81 is hinged on the vacuum machine 2; one end of the push rod 82 is hinged to the piston rod of the cylinder 81, and the middle section of the push rod 82 is hinged on the vacuum machine 2; the second molding plate 83 is arranged on the other end of the push rod 82, and the structure of the second molding plate 83 is the same as that of the first molding plate 73; two second molding mechanisms 8 are arranged on the vacuum machine 2, and the opening and closing directions of the two second molding plates 83 are perpendicular to the opening and closing directions of the two first molding plates 73;

[0122] As in the above structure, in the first molding mechanism 7, when the first molding plate 73 extrude the material embryo 200, there will be a part of material protrusion between the ends of the two first molding plates 73. In order to prevent the protruding material from affecting the material embryo 200 from entering the vacuum machine 2, the second molding mechanism 8 is provided;

[0123] In the above structure, the push rod 82 is fixedly connected to the second molding plate 83, and the opening and closing direction of the two second molding plates 83 is perpendicular to the opening and closing direction of the two first molding plates 73; specifically, the second molding plates 83 correspond to the above-mentioned partially raised material;

[0124] During specific operation, the cylinder 81 drives the second molding plate 83 to swing through the push rod 82, so that the second molding plate 83 can press the unpressed part of the first molding plate 73 to avoid the problem of material protrusion in the blank 200, so that the blank 200 can quickly enter the vacuum machine 2.

[0125] like Figure 3 and Figure 5 As shown, the first displacement mechanism 4 includes a base 41, a slide plate 42 and a two-way telescopic cylinder 43, wherein the base 41 is arranged on the movable end of the second displacement mechanism 5, and two parallel slide grooves 401 are opened on the base 41; two slide plates 42 are arranged in each of the two slide grooves 401, wherein the two slide plates 42 in one slide groove 401 are each connected to a bracket 3, and the two slide plates 42 in the other slide groove 401 are each connected to a first molding plate 73; the two-way telescopic cylinder 43 is arranged on the base 41, one end of the two-way telescopic cylinder 43 is connected to the two slide plates 42 located on the same side of the two slide grooves 401, and the other end of the two-way telescopic cylinder 43 is connected to the other two slide plates 42;

[0126] As in the above structure, when the first displacement mechanism 4 performs the opening and closing action, it is realized by the bidirectional telescopic cylinder 43, which drives the two brackets 3 to open and close relatively, and simultaneously drives the two first shaping mechanisms 7 to open and close;

[0127] In this structure, the bracket 3 and the first shaping mechanism 7 are not only connected to the first displacement mechanism 4, but also connected to each other, so as to ensure the stability of the structure;

[0128] Specifically, when the action is performed, the two-way telescopic cylinder 43 is actuated to drive the slide plate 42 to slide in the slide groove 401 , and then the slide plate 42 drives the bracket 3 and the first shaping mechanism 7 to perform opening and closing movements.

[0129] In some embodiments, the first displacement mechanism 4 may also adopt two linear modules, which are linearly arranged. A bracket 3 and a first molding mechanism 7 can be installed on one linear module. In this way, the two linear modules work together to realize the opening and closing between the brackets 3 and the first molding mechanism 7.

[0130] The application method of the plastic pipe preparation system of the present invention comprises the following steps:

[0131] S1, the first displacement mechanism 4 drives the two brackets 3 to open relatively, and the second displacement mechanism 5 drives the first displacement mechanism 4 and the bracket 3 to approach the vacuum machine 2;

[0132] S2, the first displacement mechanism 4 drives the two brackets 3 to move relatively close together, and heats the traction tube 100 through the heating component;

[0133] S3, extruder 1 starts to discharge material, and at this time, the defective material output from the front end is cleaned;

[0134] S4, the first displacement mechanism 4 drives the two brackets 3 to be relatively close together, and the second displacement mechanism 5 drives the first displacement mechanism 4 and the bracket 3 to be close to the extruder 1;

[0135] S5, the blank 200 outputted from the extruder 1 is sleeved onto the bracket 3;

[0136] S6, the second displacement mechanism 5 maintains the discharging speed, and drives the first displacement mechanism 4 and the bracket 3 to approach the vacuum machine 2, so as to sleeve the end of the blank 200 onto the traction tube 100;

[0137] S7, increasing the moving speed of the second displacement mechanism 5, so that the bracket 3 is disengaged from between the traction tube 100 and the blank 200, at which time the end of the blank 200 is bonded and fixed to the end of the traction tube 100;

[0138] S8, the extruder 1 continues to discharge material, and the embryo 200 is pulled into the vacuum machine 2 through the pulling tube 100 to shape the embryo 200.

[0139] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plastic pipe preparation system, comprising an extruder (1) and a vacuum machine (2), wherein the discharge port of the extruder (1) and the feed port of the vacuum machine (2) are arranged opposite to each other, and a traction tube (100) is arranged in the vacuum machine (2); Features: It also includes a bracket (3), a first displacement mechanism (4), a second displacement mechanism (5) and a heating component, wherein: Two of the supports (3) are arranged opposite to each other, and a heating component is arranged on each of the two supports (3); the supports (3) are used to support the blank (200) extruded by the extruder (1), and the heating component is used to heat the traction tube (100); The support (3) comprises a connecting tube (31), a support plate (32) and a first air supply tube (33), wherein the connecting tube (31) is connected to the movable end of the first displacement mechanism (4); the support plate (32) is arranged on a side of the connecting tube (31) facing the extruder (1), a plurality of the support plates (32) are arranged in an arc-shaped array, the support plates (32) are hollow structures, and are connected to the connecting tube (31), and a first through hole (301) is formed on a surface of the support plate (32); the first air supply tube (33) is arranged on one side of the connecting tube (31), and the first air supply tube (33) is connected to the connecting tube (31), and the first air supply tube (33) is used to supply hot air; The first displacement mechanism (4) is used to drive the two brackets (3) to open and close relative to each other; The second displacement mechanism (5) is used to drive the first displacement mechanism (4), the bracket (3) and the heating component to move back and forth between the extruder (1) and the vacuum machine (2) so as to dock the blank (200) onto the traction tube (100).

2. The plastic pipe preparation system according to claim 1, characterized in that: The heating component is an electric heating plate (6), and one electric heating plate (6) is provided on the inner side of each of the two connecting pipes (31); The electric heating plate (6) is in the form of a semicircular ring. Driven by the first displacement mechanism (4), the two electric heating plates (6) form the heating component in the form of a full circular ring, or are separated into a single semicircular ring-shaped plate structure.

3. The plastic pipe preparation system according to claim 1, characterized in that: The connecting pipe (31) comprises an inner pipe (311) and an outer pipe (312), wherein: The cross-sections of the inner tube (311) and the outer tube (312) are both semicircular structures, and the inner tube (311) and the outer tube (312) are spliced ​​together to form a semicircular ring structure with a full-circular cross-section; A plurality of second through holes (302) are formed on a side of the inner tube (311) away from the outer tube (312); The support plate (32) is connected to and penetrates the outer tube (312); The inner tube (311) is the heating component, and two inner tubes (311) form the heating component with a full circular ring structure.

4. The plastic pipe preparation system according to any one of claims 1 to 3, characterized in that: It also includes a first shaping mechanism (7), the first shaping mechanism (7) including a limiting rod (71), a connecting plate (72) and a first shaping plate (73), wherein: The limiting rod (71) is arranged on the connecting pipe (31), and the limiting rod (71) is parallel to the first air supply pipe (33); One end of the connecting plate (72) is sleeved on the first air supply pipe (33) and the limiting rod (71), and is fastened by a nut; The first molding plate (73) is arranged on the other end of the connecting plate (72), the first molding plate (73) is in an arc-shaped plate structure, and the end of the first molding plate (73) is folded to form a chamfered portion (701), so that the central angle of the first molding plate (73) is less than 180°; The first shaping mechanism (7) is provided on both of the two brackets (3).

5. The plastic pipe preparation system according to claim 4, characterized in that: It also includes a second shaping mechanism (8), the second shaping mechanism (8) including a cylinder (81), a push rod (82) and a second shaping plate (83), wherein: The cylinder body of the air cylinder (81) is hinged on the vacuum machine (2); One end of the push rod (82) is hinged to the piston rod of the cylinder (81), and the middle section of the push rod (82) is hinged to the vacuum machine (2); The second molding plate (83) is arranged on the other end of the push rod (82), and the structure of the second molding plate (83) is the same as that of the first molding plate (73); Two of the second molding mechanisms (8) are provided on the vacuum machine (2), and the opening and closing directions of the two second molding plates (83) are perpendicular to the opening and closing directions of the two first molding plates (73).

6. The plastic pipe preparation system according to claim 4, characterized in that: The first displacement mechanism (4) comprises a base (41), a slide plate (42) and a bidirectional telescopic cylinder (43), wherein: The base (41) is arranged on the movable end of the second displacement mechanism (5), and two parallel sliding grooves (401) are formed on the base (41); Two slide plates (42) are provided in each of the two slide grooves (401), wherein the two slide plates (42) in one slide groove (401) are each connected to one of the brackets (3), and the two slide plates (42) in the other slide groove (401) are each connected to one of the first molding plates (73); The bidirectional telescopic cylinder (43) is arranged on the base (41), one end of the bidirectional telescopic cylinder (43) is connected to two slide plates (42) located on the same side of the two slide grooves (401), and the other end of the bidirectional telescopic cylinder (43) is connected to the other two slide plates (42).

7. The plastic pipe preparation system according to claim 2 or 3, characterized in that: It also includes a guide ring (9), the guide ring (9) including four half ring bodies (91) and at least two connecting rods (92), wherein: The four half-ring bodies (91) form two full rings, and the two full rings are located opposite to each other on two sides of the heating component; The two connecting rods (92) are both arranged on the heating assembly, and two ends of the two connecting rods (92) are respectively connected to one of the semi-ring bodies (91); The inner diameter of the full ring is smaller than the inner diameter of the heating component constituting the full circular ring structure, and the relatively far sides of the two full rings are flared structures.

8. The plastic pipe preparation system according to claim 7, characterized in that: The guide ring (9) further comprises a second air supply pipe (93); the semi-ring body (91) and the connecting rod (92) are both hollow structures and are interconnected; The flared end of the semi-ring body (91) is provided with a third through hole (901); The second air supply pipe (93) is connected to and communicates with the connecting rod (92), and the second air supply pipe (93) is used to supply cooling air flow.

9. The application method of the plastic pipe preparation system according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1, the first displacement mechanism (4) drives the two brackets (3) to open relative to each other, and drives the first displacement mechanism (4) and the bracket (3) to approach the vacuum machine (2) through the second displacement mechanism (5); S2, the first displacement mechanism (4) drives the two brackets (3) to move relatively close together, and heats the traction tube (100) through the heating component; S3, the extruder (1) starts discharging material, and at this time, the defective material outputted from the front end is cleaned; S4, the first displacement mechanism (4) drives the two brackets (3) to move relatively close together, and the second displacement mechanism (5) drives the first displacement mechanism (4) and the bracket (3) to move closer to the extruder (1); S5, the blank (200) output by the extruder (1) is sleeved onto the bracket (3); S6, the second displacement mechanism (5) maintains the material discharging speed, and drives the first displacement mechanism (4) and the support (3) to approach the vacuum machine (2), so as to sleeve the end of the blank (200) onto the traction tube (100); S7, increasing the moving speed of the second displacement mechanism (5) so that the bracket (3) is disengaged from between the traction tube (100) and the blank (200), and at this time, the end of the blank (200) is bonded and fixed to the end of the traction tube (100); S8, the extruder (1) continues to discharge material, and the material blank (200) is pulled into the vacuum machine (2) through the pulling tube (100) to perform shaping of the material blank (200).

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