阅读说明：本技术 一种设有的螺筒腔体的错开式注塑机 (Staggered injection molding machine with screw cylinder cavity ) 是由 张衡 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种设有的螺筒腔体的错开式注塑机,注塑机本体的一侧工作台上安装有用于对原料加热的螺筒主体,螺筒主体,所述螺筒主体还包括第一螺筒壳体和第二螺筒壳体,第一螺筒壳体,所述第一螺筒壳体的下部通过螺栓固定在所述注塑机本体的一侧工作台上,用于所述第一螺筒壳体在所述注塑机本体上端面的安装固定,保证送料螺杆在所述输料腔内部的输料传动。该设有的螺筒腔体的错开式注塑机,通过对注塑机螺筒结构的改进,可在对螺筒进行维修时,方便对螺筒内部的清理和维修,并方便将进料螺杆的移出,同时,针对加热板形状和安装方式的改进,提高了加热板的安装效率。(The invention discloses a staggered injection molding machine with a screw cylinder cavity, wherein a screw cylinder main body for heating raw materials and a screw cylinder main body are arranged on a workbench on one side of an injection molding machine body, the screw cylinder main body further comprises a first screw cylinder shell, a second screw cylinder shell and a first screw cylinder shell, the lower part of the first screw cylinder shell is fixed on the workbench on one side of the injection molding machine body through bolts and is used for installing and fixing the first screw cylinder shell on the upper end surface of the injection molding machine body, and the material conveying transmission of a feeding screw rod in a material conveying cavity is ensured. This staggered injection molding machine of spiral shell cylinder cavity with, through the improvement to injection molding machine spiral shell cylinder structure, can be when maintaining the spiral shell, conveniently to the inside clearance and the maintenance of spiral shell cylinder to conveniently shift out feeding screw, simultaneously, to the improvement of hot plate shape and mounting means, improved the installation effectiveness of hot plate.)

1. The utility model provides a formula of staggering injection molding machine of spiral shell section of thick bamboo cavity with, install on one side workstation of injection molding machine body (1) and be used for spiral shell section of thick bamboo main part (2) to raw materials heating, its characterized in that:

the screw barrel comprises a screw barrel main body (2), wherein the screw barrel main body (2) further comprises a first screw barrel shell (3) and a second screw barrel shell (4);

the lower part of the first screw cylinder shell (3) is fixed on a workbench on one side of the injection molding machine body (1) through bolts and is used for installing and fixing the first screw cylinder shell (3) on the upper end face of the injection molding machine body (1);

the second screw cylinder shell (4) is fixed on the front side of the first screw cylinder shell (3) through bolts, and material conveying cavities (15) are formed in the inner sides of the first screw cylinder shell (3) and the second screw cylinder shell (4), so that the first screw cylinder shell (3) and the second screw cylinder shell (4) form a finished screw cylinder main body (2);

the screw rod mounting hole (19) that is used for wearing to establish feeding screw rod (11) is seted up to the inner of first barrel casing (3), the inner of feeding screw rod (11) with the output of motor is connected on injection molding machine body (1), guarantees that feeding screw rod (11) are in defeated material transmission of defeated material chamber (15) inside.

2. The staggered injection molding machine with barrel cavities of claim 1, wherein: the utility model discloses a screw tube shell, including first screw tube shell (4), butt joint sliding tray (9) of second screw tube shell (4), and with spacing mouthful (5) of butt joint of first screw tube shell (3) one end are alignd, the middle part equidistance that connects sliding tray (9) distributes and has bottom mounting hole (10) that are used for installing fixing bolt, the lower extreme of first screw tube shell (3) is located in butt joint sliding tray (9) of second screw tube shell (4) lower part, lower part fixed part (7) of second screw tube shell (4) lower extreme avris passes through the lower extreme fixed connection of bolt and first screw tube shell (3), the upper end of first screw tube shell (3) with the upper end of second screw tube shell (4) all is through upper portion fixed part (6) bolted connection.

3. The staggered injection molding machine with barrel cavities of claim 1, wherein: the heating device is characterized in that a heating cavity (12) used for installing an arc-shaped heating plate (13) is formed in the side wall of the first screw cylinder shell (3) and the side wall of the second screw cylinder shell (4), and the heating cavity (12) penetrates through the first screw cylinder shell (3) and the second screw cylinder shell (4) and is far away from one end of the screw rod installation hole (19).

4. The staggered injection molding machine with barrel cavities of claim 3, wherein: first spiral shell section of thick bamboo casing (3) with second spiral shell section of thick bamboo casing (4) lateral wall outside regulation hole (8) female connection has adjusting bolt (16), the inner of adjusting bolt (16) is connected with push pedal structure (18) through the bearing, first spiral shell section of thick bamboo casing (3) with second spiral shell section of thick bamboo casing (4) lateral wall top advance run through set up with pass mouth (25) of heating cavity (12) intercommunication.

5. The staggered injection molding machine with barrel cavities of claim 3, wherein: the shape structure of heating cavity (12) is circular-arc structure, first spiral shell section of thick bamboo casing (3) with second spiral shell section of thick bamboo casing (4) are close to heating cavity (12) inner wall is gone up an organic whole and has had strip limit structure (14) that the level set up.

6. The staggered injection molding machine with barrel cavities of claim 4, wherein: the push plate structure (18) is located inside an attaching groove (17) in the side wall of the heating cavity (12), and the outer side of the push plate structure (18) is flush with the edge of the attaching groove (17).

7. The staggered injection molding machine with barrel cavities of claim 5, wherein: the inside butt joint interlude of heating cavity (12) has arc hot plate (13), the thickness of arc hot plate (13) is less than the thickness of heating cavity (12), the inside wall of arc hot plate (13) with heating cavity (12) lateral wall is laminated mutually, set up on the lateral wall of arc hot plate (13) and correspond strip spacing groove (22) that set up with strip limit structure (14).

8. The staggered injection molding machine with barrel cavities of claim 7, wherein: one end middle part integrated into one piece of arc hot plate (13) has reference column (24), be axial symmetry on arc hot plate (13) of both sides about reference column (24) and be provided with and lead electrical pillar (23), 2 from top to bottom it is positive negative pole setting respectively to lead electrical pillar (23).

9. The staggered injection molding machine with barrel cavities of claim 8, wherein: set up spacing hole (21) that correspond the setting with reference column (24) in the middle part of the other end of arc hot plate (13), be axial symmetry on arc hot plate (13) of both sides about spacing hole (21) and be provided with electrically conductive mouth (20), the most inboard arc hot plate (13) only are provided with electrically conductive mouth (20) with spacing hole (21), the outside arc hot plate (13) only are provided with electrically conductive post (23) with reference column (24), and keeping away from the one end of electrically conductive post (23) is provided with and is used for circular telegram wire.

Technical Field

The invention relates to the technical field of screw barrels of injection molding machines, in particular to a staggered injection molding machine with a screw barrel cavity.

Background

The injection molding machine is using the in-process of maintaining, and the foreign matter can be deposited to inevitable in the raw materials, and the time is of a specified duration, will certainly lead to the fact the wearing and tearing of the inside cavity inner wall of injection molding machine spiral shell section of thick bamboo, also can lead to the fact feeding screw's damage simultaneously, and then need tear open the clearance maintenance to the injection molding machine spiral shell section of thick bamboo.

For example, reference is made to the file application No.: CN200810027245.8, date of authorized announcement: 20101117, comprising an extrusion mechanism, an injection device and at least two dies, characterized in that: the injection device is connected with each mould through at least one material distribution mechanism. The feed mechanism comprises a shell, at least one switching rod and a reciprocating mechanism with the same number of the switching rods, wherein a feed hole and at least one discharge hole are formed in the shell, the inlet of the feed hole is connected with the outlet of an injection device, the outlet of each discharge hole is connected with the inlet of a corresponding die, the outlet of the feed hole and the inlet of each discharge hole are connected with the switching rods, the tail end of each switching rod is connected with the reciprocating mechanism, the front end of each switching rod is inserted into the shell, and the switching rods are provided with connecting grooves which are the same as the number of the discharge holes and can be communicated with the outlet of the feed hole and the corresponding discharge holes. The injection molding machine is mainly provided with the material distribution mechanism, can effectively reduce the waiting time of the injection molding mechanism, can greatly improve the working efficiency of the injection molding machine and reduce the energy consumption,

however, the above-mentioned injection molding machine screw barrel has the following problems in use:

1. the screw barrel structure is an integrally formed single screw barrel structure, when the screw barrel needs to be maintained, the whole screw barrel needs to be disassembled, and the feed screw is inconvenient to disassemble;

2. the heating plate is usually fixed outside the heating barrel, but when the heating plate is installed, the heating plate needs to be fixed outside the barrel through bolts one by one and connected with a lead, so that the installation process is complicated and time-consuming.

Disclosure of Invention

The invention aims to provide a staggered injection molding machine with a barrel cavity, which aims to solve the problems that the prior barrel of the injection molding machine in the market, which is provided by the background art, is in an integrally formed single barrel structure when in use, the whole barrel needs to be disassembled when the barrel needs to be maintained, the feed screw is inconvenient to disassemble, a heating plate is usually fixed outside the heating barrel, but the heating plates need to be fixed outside the barrel one by one through bolts and connected with wires when the heating plates are installed, the installation process is complicated, and the time is consumed.

In order to achieve the purpose, the invention provides the following technical scheme: a staggered injection molding machine with a screw cylinder cavity is characterized in that a screw cylinder main body for heating raw materials and a screw cylinder main body are arranged on a workbench on one side of an injection molding machine body, the screw cylinder main body further comprises a first screw cylinder shell, a second screw cylinder shell and a first screw cylinder shell, the lower portion of the first screw cylinder shell is fixed on the workbench on one side of the injection molding machine body through bolts and used for fixedly installing the first screw cylinder shell on the upper end surface of the injection molding machine body, the second screw cylinder shell is fixed on the front side of the first screw cylinder shell through bolts, material conveying cavities are formed in the inner sides of the first screw cylinder shell and the second screw cylinder shell, the first screw cylinder shell and the second screw cylinder shell form a finished screw cylinder main body, and a screw rod installing hole for penetrating a feeding screw rod is formed in the inner end of the first screw cylinder shell, the inner end of the feeding screw is connected with the output end of a motor on the injection molding machine body, and feeding transmission of the feeding screw in the feeding cavity is guaranteed.

Further, the front side lower part of first spiral shell casing is offered and is used for the installation in the butt joint sliding tray of second spiral shell casing, and with the spacing mouthful of butt joint of first spiral shell casing one end aligns, the middle part equidistance that connects the sliding tray distributes and has the bottom mounting hole that is used for installing fixing bolt, the lower extreme of first spiral shell casing is located the second spiral shell casing lower part connects the sliding tray, the lower part fixed part of two spiral shell casing lower extreme avris passes through the lower extreme fixed connection of bolt and first spiral shell casing, the upper end of first spiral shell casing with the upper end of second spiral shell casing all passes through upper portion fixed part bolted connection, through setting up the spiral shell main part into two parts of first spiral shell casing and second spiral shell casing, can realize the dismantlement to the spiral shell main part, makes things convenient for the maintenance workman to the maintenance of the inside cavity of spiral shell main part.

Further, the side walls of the first screw cylinder shell and the second screw cylinder shell are respectively provided with a heating cavity for installing the arc-shaped heating plate, the heating cavity penetrates through one end of the first screw cylinder shell and one end of the second screw cylinder shell far away from the screw rod installation hole, the outer side of the side wall of the first screw cylinder shell and the outer side of the side wall of the second screw cylinder shell are internally and threadedly connected with an adjusting bolt, the inner end of the adjusting bolt is connected with a push plate structure through a bearing, a pushing port communicated with the heating cavity is further formed in the upper portion of the side wall of the first screw cylinder shell and the upper portion of the side wall of the second screw cylinder shell in a penetrating manner, the arc-shaped heating plate is inserted in the inner portion of the heating cavity in a butt joint manner, the thickness of the arc-shaped heating plate is smaller than that of the heating cavity, the inner side wall of the arc-shaped heating plate is attached to the side wall of the heating cavity, and the outer side wall of the arc-shaped heating plate is provided with a strip-shaped limiting groove correspondingly arranged with the strip-shaped limiting structure, the middle part of the other end of the arc-shaped heating plate is provided with a limiting hole which is arranged corresponding to the positioning column, the arc-shaped heating plates at the upper side and the lower side of the limiting hole are provided with conducting ports in axial symmetry, the arc-shaped heating plate at the innermost side is only provided with the conducting ports and the limiting hole, the arc-shaped heating plate at the outermost side is only provided with the conducting posts and the positioning column, a conducting wire for electrifying is arranged at one end far away from the conducting post, a positioning post is integrally formed in the middle of one end of the arc-shaped heating plate, the arc-shaped heating plates on the upper and lower sides of the positioning column are provided with conducting columns in axial symmetry, the upper and lower 2 conducting columns are respectively provided with a positive electrode and a negative electrode, can realize with the arc hot plate at the inside butt joint that pushes of heating cavity, convenient and fast has reduced the maintenance workman and has installed the step of screw on the arc hot plate one by one to and the connection of wire.

Further, the shape structure of heating cavity is circular-arc structure, first spiral shell section of thick bamboo casing with second spiral shell section of thick bamboo casing is close to heating cavity inner wall is last integrative has the strip limit structure that the level set up, inserts the arc hot plate when heating cavity is inside, can realize stable the pushing of arc hot plate, avoids crooked of arc hot plate, makes things convenient for the butt joint between the adjacent arc hot plate.

Further, the push pedal structure is located the laminating inslot portion on the heating cavity lateral wall, the outside of push pedal structure with the edge parallel and level in laminating groove sets up, and after the installation arc hot plate, the accessible is adjusted the push pedal structure and is promoted the arc hot plate, realizes hugging closely of arc hot plate and spiral shell section of thick bamboo main part inner wall.

Compared with the prior art, the invention has the beneficial effects that: according to the staggered injection molding machine with the barrel cavity, through the improvement of the barrel structure of the injection molding machine, the barrel can be detached when the barrel is maintained, so that the cleaning and maintenance of the interior of the barrel are facilitated, the feeding screw rod is convenient to move out, and meanwhile, the installation efficiency of the heating plate is improved by aiming at the improvement of the shape and the installation mode of the heating plate;

1. the screw barrel main body is arranged into the first screw barrel shell and the second screw barrel shell, so that the first screw barrel shell and the second screw barrel shell on the screw barrel main body can be detached, maintenance workers can conveniently overhaul and replace a single first screw barrel shell or a single second screw barrel shell, and replacement cost is reduced;

2. the middle parts of the outer walls of the first barrel shell and the second barrel shell are provided with heating cavities with one open ends, so that the arc-shaped heating plates can be installed, the inner walls of the heating cavities are provided with strip-shaped limiting structures, the arc-shaped heating plates can slide into the heating cavities in a limiting mode through strip-shaped limiting grooves, and are butted with conductive ports and limiting holes in adjacent arc-shaped heating plates through conductive columns and positioning columns, the arc-shaped heating plates can be conveniently and quickly installed, meanwhile, the outer walls of the first barrel shell and the second barrel shell are provided with adjusting holes, and adjusting bolts in the adjusting holes can be adjusted to enable the push plate structures at the outer ends of the adjusting bolts to tightly push the arc-shaped heating plates, so that the arc-shaped heating plates are conveniently attached to the inner walls of the heating cavities, and the heating effect is improved;

3. the pushing port is formed in the outer wall of the first screw cylinder shell and the outer wall of the second screw cylinder shell, so that when the arc-shaped heating plate is required to be detached, the arc-shaped heating plate inside the heating cavity can be pushed out through the pushing port, and the operation is simple and rapid.

Drawings

FIG. 1 is a schematic front view of an injection molding machine body and a screw barrel main body of a staggered injection molding machine provided with a screw barrel cavity according to the present invention;

FIG. 2 is a schematic sectional view of the portion A-A of the staggered injection molding machine with screw barrel cavities according to the present invention;

FIG. 3 is a schematic top view of a first barrel housing of a staggered injection molding machine having a barrel cavity according to the present invention;

FIG. 4 is an enlarged structural view of point A in FIG. 2 of a staggered injection molding machine with a barrel cavity according to the present invention;

FIG. 5 is a schematic view of the inner side structure of a first barrel housing of the staggered injection molding machine with barrel cavities according to the present invention;

FIG. 6 is a schematic structural view of an arc-shaped heating plate of a staggered injection molding machine with a barrel cavity according to the present invention;

FIG. 7 is a schematic view of the structure of the outer side of the arc-shaped heating plate of the staggered injection molding machine with the screw cylinder cavity.

In the figure: 1. an injection molding machine body; 2. a barrel body; 3. a first barrel housing; 4. a second barrel housing; 5. butting a limiting port; 6. an upper fixing portion; 7. a lower fixing portion; 8. an adjustment hole; 9. butting sliding grooves; 10. a bottom mounting hole; 11. a feed screw; 12. heating the cavity; 13. an arc-shaped heating plate; 14. a strip-shaped limiting structure; 15. a material conveying cavity; 16. adjusting the bolt; 17. a fitting groove; 18. a push plate structure; 19. a screw mounting hole; 20. a conductive port; 21. a limiting hole; 22. a strip-shaped limiting groove; 23. a conductive post; 24. a positioning column; 25. a pushing port.

Detailed Description

All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: the utility model provides a formula injection molding machine that staggers of spiral shell section of thick bamboo cavity with, install on one side workstation of injection molding machine body 1 and be used for 2, its characterized in that to the spiral shell section of thick bamboo main part of raw materials heating:

the screw barrel comprises a screw barrel main body 2, wherein the screw barrel main body 2 further comprises a first screw barrel shell 3 and a second screw barrel shell 4;

the lower part of the first screw cylinder shell 3 is fixed on a workbench at one side of the injection molding machine body 1 through bolts and is used for installing and fixing the first screw cylinder shell 3 on the upper end surface of the injection molding machine body 1;

the second screw cylinder shell 4 is fixed on the front side of the first screw cylinder shell 3 through bolts, and material conveying cavities 15 are formed in the inner sides of the first screw cylinder shell 3 and the second screw cylinder shell 4, so that the first screw cylinder shell 3 and the second screw cylinder shell 4 form a finished screw cylinder main body 2;

the inner end of the first barrel shell 3 is provided with a screw mounting hole 19 for penetrating a feeding screw 11, the inner end of the feeding screw 11 is connected with the output end of a motor on the injection molding machine body 1 to ensure the feeding transmission of the feeding screw 11 in a feeding cavity 15, the lower part of the front side of the first barrel shell 3 is provided with a butt-joint sliding groove 9 for mounting the second barrel shell 4 and is aligned with a butt-joint limiting port 5 at one end of the first barrel shell 3, bottom mounting holes 10 for mounting fixing bolts are equidistantly distributed in the middle of the butt-joint sliding groove 9, the lower end of the first barrel shell 3 is positioned in the butt-joint sliding groove 9 at the lower part of the second barrel shell 4, a lower part fixing part 7 at the side of the lower end of the second barrel shell 4 is fixedly connected with the lower end of the first barrel shell 3 through bolts, the upper end of the first barrel shell 3 and the upper end of the second barrel shell 4 are both connected through upper part fixing parts 6 bolts, through the improvement to 2 structures of the screw cylinder main body, the cleaning and the maintenance treatment to the inside of 2 screw cylinder main bodies are facilitated.

All offer the heating cavity 12 that is used for installing arc hot plate 13 on the lateral wall of first spiral shell section of thick bamboo casing 3 and second spiral shell section of thick bamboo casing 4, heating cavity 12 runs through the one end that screw rod mounting hole 19 was kept away from to first spiral shell section of thick bamboo casing 3 and second spiral shell section of thick bamboo casing 4, through the setting of heating cavity 12, conveniently install certain quantity of arc hot plate 13 inside heating cavity 12, avoid using the bolt to install single arc hot plate 13 one by one, reduce the installation and the dismantlement volume of bolt.

Adjusting bolt 16 is connected to the 8 internal screw threads of adjusting hole in the first spiral shell section of thick bamboo casing 3 and the 4 lateral walls of second spiral shell section of thick bamboo casing outside, and adjusting bolt 16's the inner is connected with push pedal structure 18 through the bearing, advances to run through and sets up the pass mouth 25 with heating cavity 12 intercommunication above first spiral shell section of thick bamboo casing 3 and the 4 lateral walls of second spiral shell section of thick bamboo casing, and through the setting of passing mouth 25, the accessible passes mouth 25 and realizes the release to heating cavity 12 inside arc hot plate 13.

The shape structure of the heating cavity 12 is an arc-shaped structure, a strip-shaped limiting structure 14 which is horizontally arranged is integrated on the inner wall of the first barrel shell 3 and the inner wall of the second barrel shell 4 which are close to the heating cavity 12, an arc-shaped heating plate 13 is inserted into the heating cavity 12 in a butt joint mode, the thickness of the arc-shaped heating plate 13 is smaller than that of the heating cavity 12, the inner side wall of the arc-shaped heating plate 13 is attached to the side wall of the heating cavity 12, a strip-shaped limiting groove 22 which corresponds to the strip-shaped limiting structure 14 is formed in the outer side wall of the arc-shaped heating plate 13, the arc-shaped heating plate 13 can be guaranteed to horizontally move in the heating cavity 12 through the arrangement of the strip-shaped limiting structure 14, and butt joint installation between adjacent arc-shaped heating plates 13 is facilitated;

the push plate structure 18 is located inside the fitting groove 17 on the side wall of the heating cavity 12, the outer side of the push plate structure 18 is flush with the edge of the fitting groove 17, a positioning column 24 is integrally formed in the middle of one end of the arc heating plate 13, the arc heating plates 13 on the upper and lower sides of the positioning column 24 are provided with conductive columns 23 in axial symmetry, the upper and lower 2 conductive columns 23 are respectively provided with positive and negative poles, the middle of the other end of the arc heating plate 13 is provided with a limiting hole 21 corresponding to the positioning column 24, the arc heating plates 13 on the upper and lower sides of the limiting hole 21 are provided with conductive ports 20 in axial symmetry, the arc heating plate 13 on the innermost side is only provided with the conductive port 20 and the limiting hole 21, the arc heating plate 13 on the outermost side is only provided with the conductive column 23 and the positioning column 24, and one end away from the conductive column 23 is provided with a conductive wire, after the arc heating plates 13 are aligned inside the heating cavity 12, the arc heating plate 13 is tightly pushed by the push plate structure 18, so that the arc heating plate 13 is prevented from moving and dislocating in the heating cavity 12.

The working principle is as follows: when the staggered injection molding machine with the barrel cavity is used, as shown in fig. 1-3 and 5, the first barrel housing 3 is fixed on the mounting table at the upper part of the injection molding machine body 1, then bolts are used to pass through the side of the first barrel housing 3 and the bottom mounting hole 10 on the butt sliding groove 9, and further the first barrel housing 3 is fixed, then the feeding screw 11 is put into the feeding cavity 15 at the inner side of the first barrel housing 3, the connecting end of the feeding screw 11 passes through the screw mounting hole 19 on the first barrel housing 3 and is connected with the output end of the motor on the injection molding machine body 1, then the bottom of the second barrel housing 4 is put into the butt sliding groove 9 at the bottom of the first barrel housing 3, the inner end of the second barrel housing 4 is butt-jointed with the butt limiting port 5 on the first barrel housing 3, and the bottom lower fixing part 7 and the top upper fixing part 6 of the second barrel housing 4 are butt-jointed with the first barrel housing 3 by bolts Tightly supporting and fixing, and at the moment, finishing the installation of the first screw cylinder shell 3 and the second screw cylinder shell 4 on the screw cylinder main body 2;

as shown in fig. 2-3 and 5-7, the first arc heating plate 13 without the conductive column 23 and the positioning column 24 is first placed into the heating cavity 12 on the sidewall of the first barrel shell 3 or the second barrel shell 4, and the strip-shaped spacing groove 22 on the outer side of the arc heating plate 13 is aligned with the strip-shaped spacing structure 14 on the inner wall of the heating cavity 12, at this time, the arc heating plate 13 is pushed into the heating cavity 12, then the arc heating plate 13 with the conductive column 23 and the positioning column 24 is pushed into the heating cavity 12, the conductive column 23 and the positioning column 24 on the second arc heating plate 13 are respectively inserted into the conductive port 20 and the spacing hole 21 at the outer end of the first arc heating plate 13, so as to realize the series connection of the heating wires inside the arc heating plate 13, and finally, the rest arc heating plates 13 with the conductive column 23 and the positioning column 24 are pushed into the heating cavity 12 according to the same steps, as shown in fig. 1-2 and fig. 4-5, a screwdriver is used to screw an adjusting bolt 16 inside an adjusting hole 8 on the outer side wall of the first barrel shell 3 or the second barrel shell 4, the adjusting bolt 16 is meshed with the outer side wall thread of the first barrel shell 3 or the second barrel shell 4 to drive a push plate structure 18 inside an attaching groove 17 to tightly push against an arc-shaped heating plate 13 inside the heating cavity 12, so that the arc-shaped heating plate 13 is fixed, and a lead on the arc-shaped heating plate 13 on the outermost side is connected with an external power supply.

It should be understood that the terms "central," "longitudinal," "transverse," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in a generic and descriptive sense only and not for purposes of limitation, that the present invention is used with reference to the particular orientation or position shown in the drawings, that the standard components used in the present invention are commercially available, that the specific components are custom-made from the specification and drawings, that the specific connections between the various components are made by conventional means such as bolts, rivets, welding, etc., that the machines, components and devices are well known in the art, the conventional model, together with the circuit connections, are conventional in the art and will not be described in detail here.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes, modifications, equivalents, and improvements may be made without departing from the spirit and scope of the invention.