A head warming device for an injection molding machine

Abstract

The present application relates to the technical field of casting machine, and particularly provides a casting machine head heating device, which comprises a heat preservation shell, the heat preservation shell is used for wrapping the outer periphery of the casting machine head, a plurality of heating rods are arranged in the heat preservation shell, the heating rods are used for heating the casting machine head, and a supporting assembly is arranged in the heat preservation shell, the supporting assembly is used for supporting the plurality of heating rods, so that the heat preservation shell can be uniformly distributed when being installed on the outer periphery of the casting machine head, the heating dead angle and temperature difference caused by the asynchronous installation of the traditional device are reduced, the overall temperature of the machine head is ensured to be balanced, the problems such as poor flowability and solidification blockage of the material caused by local cooling are avoided, and the casting quality is improved.

Description

Technical Field

[0001] This invention relates to the field of casting machine technology, and in particular to a casting machine head heating device. Background Technology

[0002] The casting machine head is the terminal execution component of various casting equipment. It is responsible for accurately conveying, distributing or mixing materials such as molten metal, resin, and slurry before injecting them into the mold or cavity. The casting machine head heating device is a key auxiliary device to ensure casting quality. It is mainly used to maintain a stable temperature of the machine head and materials to prevent the materials from becoming less fluid, solidifying and clogging, or deteriorating in performance due to temperature drop during the casting process.

[0003] When using the casting machine head, it is necessary to heat it to maintain the temperature. Quartz heaters are used for heat preservation of the machine head. When the quartz heater is installed on the outer periphery of the machine head, the uneven distribution of the quartz tubes can be caused by the asynchronous installation of the fixing screws. This results in uneven heating and asynchronous circumferential contraction during installation, which makes the distance between the quartz tube and the nozzle wall inconsistent. Consequently, the quartz tube heats the machine head unevenly, affecting the casting quality. Summary of the Invention

[0004] Therefore, it is necessary to provide a casting machine head heating device to address the problem of uneven heating caused by the inconsistent distance between the quartz tube and the outer periphery of the casting head.

[0005] The above objectives are achieved through the following technical solutions:

[0006] A heating device for the head of a casting machine, comprising:

[0007] An insulating shell is used to wrap the outer periphery of the casting machine head, and multiple heating rods are installed inside the insulating shell;

[0008] A support assembly is disposed inside the insulation shell and is used to support multiple heating rods. The support assembly is configured to distribute the multiple heating rods circumferentially and evenly inside the insulation shell when the insulation shell is installed on the outer periphery of the casting machine head.

[0009] Furthermore, the support assembly includes multiple sliding blocks and multiple arc-shaped support rods. The multiple arc-shaped support rods are all arc-shaped. The multiple sliding blocks are slidably disposed on the inner wall of the insulation shell. The sliding trajectory of the multiple sliding blocks is circular. The multiple arc-shaped support rods are grouped in pairs. The two arc-shaped support rods in each group are hinged to the same sliding block at the middle position. The ends of the arc-shaped support rods in adjacent groups are hinged to each other. The number of sliding blocks is the same as the number of groups of arc-shaped support rods. The heating rod is fixedly disposed on the sliding block and located between the two arc-shaped support rods in the same group.

[0010] Furthermore, the ends of the plurality of arc-shaped support rods are elastically telescopic, and the length of the plurality of arc-shaped support rods is negatively correlated with the outer circumferential diameter of the casting machine head.

[0011] Furthermore, the arc-shaped support rod includes a middle rod and two end sleeves, both of which are arc-shaped. The two end sleeves are slidably fitted onto both ends of the middle rod. An elastic element is provided between the two end sleeves and both ends of the middle rod, and the elastic element has a tendency to push the two end sleeves away from each other.

[0012] Furthermore, the elastic element is a compression spring.

[0013] Furthermore, the heat-insulating shell is provided with an opening, and a locking component is provided at the opening, the locking component being used to open or lock the opening.

[0014] Furthermore, the engaging assembly includes connecting blocks and bolts. There are two connecting blocks, which are respectively fixed on both sides of the opening of the insulation shell. Each connecting block has a connecting hole, and the bolt is threaded into the connecting hole.

[0015] Furthermore, an annular groove is provided on the inner wall of the insulation shell, and an annular frame is fixedly installed in the annular groove. There are two annular frames, both of which are semi-annular. One end of the two annular frames is hinged to each other, and the other end of the two annular frames is close to the opening of the insulation shell. Multiple sliding blocks are slidably installed on the two annular frames.

[0016] Furthermore, rubber rings are provided at the upper and lower ends of the plurality of arc-shaped support rods. The outer circumference of the rubber rings seals against the inner wall of the insulation shell, and the inner circumference of the rubber rings seals against the outer circumference of the casting machine head.

[0017] Furthermore, a power cord is provided on the outer periphery of the insulation shell, and the power cord is electrically connected to multiple heating rods.

[0018] The beneficial effects of this invention are:

[0019] This invention, by setting up a support component, can evenly distribute multiple heating plates circumferentially around the outer periphery of the casting machine head when the insulation shell is installed on the outer periphery of the casting machine head. All heating rods are at the same distance and with equal spacing from the outer periphery wall of the casting machine head, reducing heating dead zones and temperature differences caused by asynchronous installation in traditional devices, ensuring a uniform overall temperature of the casting machine head, avoiding problems such as poor fluidity, solidification and blockage of materials due to local cooling, and improving casting quality.

[0020] This invention features an arc-shaped support rod with elastic extension and retraction at both ends. The two ends of the arc-shaped support rod elastically abut against the outer circumference of the casting machine head, thereby adapting to casting machine heads of different diameters and always maintaining elastic contact with the outer circumference of the machine head. Even if there are slight dimensional deviations or installation offsets in the machine head, the elastic structure can ensure that the distance between the heating rod and the machine head remains constant, maintaining uniform heating.

[0021] The thermal insulation shell of the present invention is made of elastic heat insulation material and is provided with an opening and a locking assembly to facilitate the installation of the thermal insulation shell.

[0022] This invention forms a sealing structure by setting rubber rings at the upper and lower ends of the arc-shaped support rod. The inner circumference of the ring abuts against the outer circumference of the casting machine head, and the outer circumference seals the inner wall of the heat-insulating shell, thus isolating the heating area from the outside world, reducing heat loss, improving heating efficiency, and reducing energy consumption. At the same time, it prevents operators from being burned by high temperatures, thus improving the safety of use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a casting machine head heating device provided in an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A top view of the casting machine head heating device provided in one embodiment;

[0025] Figure 3 for Figure 2 A cross-sectional view along AA of a casting machine head heating device provided in one embodiment;

[0026] Figure 4 A top view of a casting machine head heating device installed on the outer periphery of a casting machine head, according to an embodiment of the present invention;

[0027] Figure 5 for Figure 4 A cross-sectional view along BB of a casting machine head heating device provided in one embodiment;

[0028] Figure 6 for Figure 5 A partial enlarged view of part X of the casting machine head heating device provided in one embodiment;

[0029] Figure 7 This is a schematic diagram of the structure of a casting machine head heating device provided in an embodiment of the present invention when the insulation shell is removed and the device is not installed on the outer periphery of the casting machine head.

[0030] Figure 8 for Figure 7 A top view of the casting machine head heating device provided in one embodiment, with the insulation shell removed when it is not installed on the outer periphery of the casting machine head;

[0031] Figure 9This is a schematic diagram of the structure of the casting machine head heating device provided in an embodiment of the present invention when the heat insulation shell is removed after it is installed on the outer periphery of the casting machine head;

[0032] Figure 10 for Figure 9 A top view of the casting machine head heating device provided in one embodiment, with the insulation shell removed when installed on the outer periphery of the casting machine head;

[0033] Figure 11 This is a schematic diagram of the arc-shaped support rod of the casting machine head heating device according to an embodiment of the present invention;

[0034] Figure 12 for Figure 11 A cross-sectional view along CC of the arc-shaped support rod of the casting machine head heating device provided in an embodiment of the present invention;

[0035] Figure 13 This is an exploded view of a casting machine head heating device provided in an embodiment of the present invention.

[0036] in:

[0037] 100. Insulated shell; 101. Annular groove; 110. Opening; 120. Connecting block; 130. Bolt; 140. Power cord;

[0038] 200. Heating rod; 210. Sliding block; 211. Connecting rod; 220. Arc-shaped support rod; 221. Intermediate rod; 222. End sleeve; 223. Elastic element; 230. Ring frame;

[0039] 300. Rubber ring. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0041] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] The following reference Figures 1-13 This invention describes a heating device for the head of a casting machine.

[0044] A heating device for a casting machine head includes an insulating shell 100, which is used to wrap the outer periphery of the casting machine head. Multiple heating rods 200 (quartz heating tubes) are disposed inside the insulating shell 100 for heating the casting machine head. A support assembly is disposed inside the insulating shell 100 to support the multiple heating rods 200. The support assembly is configured such that when the insulating shell 100 is installed on the outer periphery of the casting machine head, the multiple heating rods 200 are evenly distributed circumferentially inside the insulating shell 100, ensuring that the distance between the multiple heating rods 200 and the casting machine head is the same, and that the distance between the multiple heating rods 200 is also the same. This allows the multiple heating rods 200 to uniformly heat the outer periphery of the casting machine head, improving the working quality of the casting machine head.

[0045] Specifically, the support assembly in this embodiment includes multiple sliding blocks 210 and multiple arc-shaped support rods 220, all of which are arc-shaped, as shown in the figure below. Figure 11 and Figure 12As shown, multiple arc-shaped support rods 220 form a spherical support structure around the outer periphery of the casting machine head. Both the upper and lower ends of the multiple arc-shaped support rods 220 can abut against the outer periphery of the casting machine head. Multiple sliding blocks 210 are slidably disposed on the inner wall of the insulation shell 100. The sliding trajectory of the multiple sliding blocks 210 is circular. The multiple arc-shaped support rods 220 are grouped in pairs, with the middle position of two arc-shaped support rods 220 in each group hinged to the same sliding block 210. The two arc-shaped support rods 220 are arranged crosswise, and the ends of adjacent groups of arc-shaped support rods 220 are hinged to each other. The number of sliding blocks 210 is the same as the number of groups of arc-shaped support rods 220; that is, one sliding block 210 corresponds to two arc-shaped support rods 220. In this embodiment, multiple heating rods 20... The number of 0 is the same as the number of sliding blocks 210. The heating rod 200 is fixedly set on the sliding block 210 and is located between two arc-shaped support rods 220 in the same group. When the sliding block 210 slides in the insulation shell 100, it will drive the two arc-shaped support rods 220 in each group to fold or unfold. When folding, the included angle between the two arc-shaped support rods 220 decreases; when unfolding, the included angle between the two arc-shaped support rods 220 increases. When multiple sliding blocks 210 are enclosed in a circle, the upper and lower ends of multiple arc-shaped support rods 220 abut against the outer periphery of the casting machine head. At this time, multiple sliding blocks 210 are evenly distributed circumferentially on the casting machine head, so that the heating rods 200 on multiple sliding blocks 210 are evenly distributed on the outer periphery of the casting machine head.

[0046] To facilitate the connection between the sliding block 210, the two arc-shaped support rods 220, and the heating rod 200, a connecting rod 211 is vertically and fixedly installed on the sliding block 210 in this embodiment. The other end of the connecting rod 211 is fixedly connected to the heating rod 200. The heating rod 200 is vertically installed. A rotating hole is opened in the middle part of the two arc-shaped support rods 220. The connecting rod 211 passes through the rotating hole of the two arc-shaped support rods 220 so that the two arc-shaped support rods 220 are connected to the sliding block 210. The heating rod 200 can prevent the two arc-shaped support rods 220 from detaching from the connecting rod 211.

[0047] In a further embodiment, the upper and lower ends of the plurality of arc-shaped support rods 220 of the present invention are elastically telescopic. The upper and lower ends of the arc-shaped support rods 220 can elastically extend and retract. When the insulation shell 100 is installed on the outer periphery of the casting machine head with different diameters, the two ends of the arc-shaped support rods 220 will adaptively extend and retract. Moreover, the length of the arc-shaped support rods 220 is negatively correlated with the diameter of the outer periphery of the casting machine head. When the insulation shell 100 is installed on the outer periphery of the casting machine head with a larger diameter, the length of the plurality of arc-shaped support rods 220 will decrease to adapt to the casting machine head with a larger diameter. When the insulation shell 100 is installed on the outer periphery of the casting machine head with a smaller diameter, the length of the plurality of arc-shaped support rods 220 will increase to adapt to the casting machine head with a larger diameter. This ensures that both ends of the arc-shaped support rods 220 can abut against the outer periphery of the casting machine head, preventing the heating rods 200 between the arc-shaped support rods 220 from colliding with the outer periphery of the casting machine head.

[0048] It should be noted that the existing casting machine head experiences slight vibrations during operation, causing gaps between the insulation structure on the outer periphery of the casting machine head and the casting machine head itself. This leads to radial displacement between the insulation structure and the outer periphery of the casting machine head, and in more severe cases, axial movement between the insulation structure and the casting machine head. In this embodiment, the elastic extension and retraction of the two ends of the arc-shaped support rod 220 can radially position the insulation shell 100 on the outer periphery of the casting machine head. The two ends of the arc-shaped support rod 220 have a force that abuts against the outer periphery of the casting machine head, making the insulation shell 100 coaxial with the casting machine head. This prevents gaps between the insulation shell 100 and the casting machine head, thereby preventing radial displacement of the insulation shell 100 relative to the casting machine head and also preventing axial movement of the insulation shell 100 relative to the casting machine head.

[0049] Specifically, in this embodiment, each of the multiple arc-shaped support rods 220 is composed of an intermediate rod 221 and an end sleeve 222, both of which are arc-shaped, such as... Figure 12 As shown, the end sleeves 222 and the intermediate rod 221 have the same curvature. The end sleeves 222 are sleeved on both ends of the intermediate rod 221. An elastic element 223 is provided between the end sleeves 222 and the two ends of the intermediate rod 221. The elastic element 223 is a compression spring. The elastic element 223 has a tendency to push the two end sleeves 222 away from each other. The elastic element 223 makes the end sleeves 222 slide to the limit at both ends of the intermediate rod 221. In this embodiment, when the elastic element 223 pushes the end sleeves 222 to the limit position, the diameter of the casting machine head it abuts is the minimum diameter. When the elastic element 223 is compressed to the limit, the diameter of the casting machine head it abuts is the maximum diameter. When the diameter of the casting machine head is within the range that the arc-shaped support rod 220 can abut, it can ensure that the arc-shaped support rod 220 abuts the casting machine head, thereby preventing the heating rods 200 between the two arc-shaped support rods 220 from being unevenly distributed on the outer periphery of the casting machine head.

[0050] It should be noted that the cross-sections of the intermediate rod 221 and the end sleeve 222 in this embodiment are rectangular, and the two will not rotate relative to each other when the end sleeve 222 is fitted onto the intermediate rod 221.

[0051] Of course, in another embodiment of the present invention, the cross-sections of the intermediate rod 221 and the end sleeve 222 can also be circular. However, guide grooves (not shown in the figure) and guide strips (not shown in the figure) need to be provided on the inner circumference of the end sleeve 222 and the outer circumference of both ends of the intermediate rod 221, respectively. The guide grooves and guide strips extend along the length direction of the end sleeve 222 and the intermediate rod 221, respectively. The guide strips are slidably disposed in the guide grooves so that the end sleeve 222 does not rotate circumferentially relative to the intermediate rod 221 when sliding at both ends of the intermediate rod 221, ensuring that the end sleeve 222 can only slide at both ends of the intermediate rod 221.

[0052] In a further embodiment, to facilitate the installation and removal of the insulation shell 100, the insulation shell 100 of the present invention is provided with an opening 110, and the insulation shell 100 is made of a high-temperature resistant elastic material. Before the insulation shell 100 is installed on the casting machine head, the operator needs to open the insulation shell 100 from the opening 110 to wrap around the outer periphery of the casting machine head. A locking component is provided at the position of the opening 110. The locking component is used to open or lock the opening 110. When the operator installs, the restriction of the locking component needs to be released. After the installation is completed, the locking component is used to lock the opening 110, thereby facilitating the installation of the insulation shell 100 on the outer periphery of the casting machine head or its removal from the casting machine head.

[0053] Specifically, the engaging assembly in this embodiment includes a connecting block 120 and a bolt 130. There are two connecting blocks 120, which are respectively fixed on both sides of the opening 110 of the insulation shell 100. The connecting blocks 120 are provided with connecting holes. The bolt 130 is threaded into the connecting holes to connect the two connecting blocks 120 together and lock the opening 110 of the insulation shell 100. When the bolt 130 is disengaged from the connecting hole, the two connecting blocks 120 separate from each other, and the opening 110 of the insulation shell 100 is no longer locked.

[0054] To facilitate the sliding of multiple sliding blocks 210 within the insulation shell 100 and maintain the shape of the insulation shell 100, the insulation shell 100 in this embodiment is cylindrical. An annular groove 101 is provided on the inner wall of the insulation shell 100 in this embodiment. An annular frame 230 is fixedly provided within the annular groove 101. The annular frame 230 is used to support the cylindrical shape of the insulation shell 100, and multiple sliding blocks 210 are slidably disposed within the annular frame 230. There are two annular frames 230, both of which are semi-annular. One end of the two annular frames 230 is hinged to each other, and the other end of the two annular frames 230 is close to the opening 110 of the insulation shell 100. When the operator opens the insulation shell 100 from the opening 110, the two annular frames 230 support the insulation shell 100 to form two semi-cylindrical tubes, and the opening 110 of the insulation shell 100 is opened and closed with the hinged position of the two annular frames 230 as the rotation center.

[0055] It should be noted that in this embodiment, the multiple sliding blocks 210 are divided into two groups to accommodate the opening and closing of the opening 110. The left side of the opening 110 of the insulation shell 100 forms one group, and the right side of the opening 110 of the insulation shell 100 forms another group. When the insulation shell 100 is not installed on the casting machine head, the multiple sliding blocks 210 in each group are close to each other, specifically as follows: Figure 7 and Figure 8 As shown, the arc-shaped support rod 220 is in a folded state at this time; when the insulation shell 100 is installed on the casting machine head, the sliding blocks 210 in each group begin to move away from each other, specifically as follows: Figure 9 and Figure 10 As shown, the arc-shaped support rod 220 gradually unfolds, causing the diameter of the circle formed by the upper and lower ends of the multiple arc-shaped support rods 220 to gradually decrease and then abut against the outer periphery of the casting machine head. At this time, the multiple heating rods 200 are a certain distance away from the outer periphery of the casting machine head, which can avoid the heating rods 200 from colliding with the outer periphery of the casting machine head and reduce the risk of damaging the heating rods 200.

[0056] like Figure 7 and Figure 8As shown, among the multiple sliding blocks 210 within the left and right annular frames 230, the middle sliding block 210 is fixedly mounted on the annular frame 230. When the operator installs the insulation shell 100, the operator needs to move the two sliding blocks 210 closest to the opening 110. Since the two arc-shaped support rods 220 on the sliding block 210 are hinged at both ends to the arc-shaped support rods 220 on the adjacent sliding blocks 210, when the operator moves one sliding block 210, the other sliding blocks 210 will slide to both sides with the middle sliding block 210 as the fixed point. That is to say, the arc-shaped support rods 220 on the multiple sliding blocks 210 begin to unfold evenly, and when the middle sliding block 210 is the most... When the two sliding blocks 210 closest to the opening 110 move closer to each other, the distance between the multiple sliding blocks 210 gradually increases. When the distance between the two sliding blocks 210 closest to the opening 110 is the same as the distance between the other multiple sliding blocks 210, the multiple sliding blocks 210 stop moving. The distance between the heating rods 200 on the multiple sliding blocks 210 is the same. Finally, the two ends of the arc-shaped support rods 220 on the two sliding blocks 210 closest to the opening 110 are hinged together, and the two ends of the arc-shaped support rods 220 on the two sliding blocks 210 farthest from the opening 110 are hinged together, so that the multiple sliding blocks 210 are connected together to form a complete spherical support structure.

[0057] In a further embodiment, scrapers (not shown in the figure) can be provided on the arc-shaped support rods 220 of the two sliding blocks 210 closest to the opening 110. The scrapers are used to scrape off dust and other impurities on the outer periphery of the casting machine head. The specific operation steps are as follows: the operator first removes the bolt 130, then opens the opening 110 of the insulation shell 100, and the operator moves the two sliding blocks 210 closest to the opening 110, so that the scrapers of the arc-shaped support rods 220 on the two sliding blocks 210 abut against the outer periphery of the casting machine head. When the operator moves the two sliding blocks 210, the scrapers can scrape off the outer periphery of the casting machine head, thereby removing impurities on the outer periphery of the casting machine head and preventing other arc-shaped support rods 220 from being affected when their ends abut against the outer periphery of the casting machine head.

[0058] In a further embodiment, the upper and lower ends of the arc-shaped support rod 220 of the present invention are provided with rubber rings 300. The outer circumferences of the two rubber rings 300 are sealed against the inner wall of the heat insulation shell 100, and the inner circumferences of the rubber rings 300 are against the outer circumference of the casting machine head. The two rubber rings 300 are respectively used to seal the cavity between the heat insulation shell 100 and the casting machine head to prevent heat loss in the cavity.

[0059] It should be noted that the rubber ring 300 in this embodiment is a semi-annular rubber ring 300, and four of them are provided. The semi-annular rubber rings 300 are provided at the upper and lower ends of the arc-shaped support rod 220 of each set of sliding blocks 210. All four rubber rings 300 are elastic and have creases to accommodate the sliding of multiple sliding blocks 210 within the ring frame 230. When the distance between the two sliding blocks 210 closest to the opening 110 is the same as the distance between the other multiple sliding blocks 210, the two semi-annular rubber rings 300 at the upper end of the arc-shaped support rod 220 seal each other to form a complete ring. Similarly, the two semi-annular rubber rings 300 at the lower end of the arc-shaped support rod 220 also seal each other to form a complete ring, thereby sealing the cavity between the insulation shell 100 and the casting machine head.

[0060] It should also be noted that in this embodiment, the multiple heating rods 200 are located on the outer side of the inner circumference of the rubber ring 300. That is, the upper and lower ends of the heating rods 200 are separated from the outer circumference of the casting machine head by the rubber ring 300, so that the outer side of the inner circumference of the rubber ring 300 can also prevent the heating rods 200 from colliding with the outer circumference of the casting machine head, thereby further improving the protective effect of the heating rods 200.

[0061] Specifically, in this embodiment, a power cord 140 is provided on the outer periphery of the heat insulation shell 100. The power cord 140 is electrically connected to multiple heating rods 200. That is, the power cord 140 provides power to the multiple heating rods 200. When the power cord 140 is connected to the power supply, the heating rods 200 start to heat up.

[0062] The specific installation process of the casting machine head heating device provided by the present invention will be described in conjunction with the above embodiments:

[0063] Install:

[0064] Before installation, the operator needs to remove the bolts 130 on the two connecting blocks 120. Then, the insulation shell 100 is pulled from the opening 110 to both sides, causing it to rotate and open around the hinged position of the two annular frames 230. The operator moves the opened insulation shell 100 towards the casting machine head, ensuring that the ends of the arc-shaped support rods 220 on the two sliding blocks 210 closest to the opening 110 abut against the outer circumference of the casting machine head. The operator moves these two sliding blocks 210 towards the two connecting blocks 120, allowing the two sliding blocks 210 to drive the arc-shaped support rods 220 to slide along the outer circumference of the casting machine head. The arc-shaped support rods 220 have scrapers (not shown in the figure) at both ends, which scrape away impurities from the outer circumference of the casting machine head. The sliding of the two sliding blocks 210 causes the other sliding blocks 210 to slide, thus... The arc-shaped support rods 220 on the multiple sliding blocks 210 are gradually unfolded. When the distance between these two sliding blocks 210 is the same as the distance between the other sliding blocks 210, the two ends of the arc-shaped support rods 220 on these two sliding blocks 210 are hinged together. At the same time, the ends of the arc-shaped support rods 220 on the two sliding blocks 210 furthest from the two connecting blocks 120 are also hinged together, thereby connecting the multiple sliding blocks 210 into a whole. The upper and lower ends of the multiple arc-shaped support rods 220 respectively abut against the outer periphery of the casting machine head. The heating rods 200 on the multiple sliding blocks 210 are also evenly distributed circumferentially, thereby improving the heating uniformity of the casting machine head by the heating rods 200. Then, the bolts 130 are installed on the two connecting blocks 120 to lock the opening 110 of the insulation shell 100, ensuring that the insulation shell 100 is wrapped around the outer periphery of the casting machine head.

[0065] As the sliding block 210 slides, the arc-shaped support rod 220 gradually unfolds, and the rubber rings 300 at the upper and lower ends of the arc-shaped support rod 220 also gradually unfold. The outer circumference of the rubber rings 300 abuts against the inner circumference of the insulation shell 100, and the inner circumference of the rubber rings 300 abuts against the casting machine head, thereby sealing the cavity between the outer circumference of the casting machine head and the insulation shell 100.

[0066] After installation, connect the power cord 140 to the power supply so that the heating rod 200 is powered on. Once the heating rod 200 is powered on, it can start heating the casting machine head.

[0067] When it is necessary to remove it, simply remove bolt 130 to open opening 110, and the operator can then pull the insulation shell 100 from the opening 110 to both sides to remove it.

[0068] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0069] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A heating device for the head of a casting machine, characterized in that, include: A heat-insulating shell is used to wrap the outer periphery of the casting machine head, and multiple heating rods are arranged inside the heat-insulating shell; A support assembly is disposed inside the insulation shell and is used to support multiple heating rods. The support assembly is configured to distribute the multiple heating rods evenly in the circumferential direction inside the insulation shell when the insulation shell is installed on the outer periphery of the casting machine head. The support assembly includes multiple sliding blocks and multiple arc-shaped support rods. All arc-shaped support rods are arc-shaped. The sliding blocks are slidably disposed on the inner wall of the insulation shell, and their sliding trajectories are circular. The arc-shaped support rods are arranged in pairs, with the two arc-shaped support rods in each pair hinged to the same sliding block at their midpoint. The ends of the arc-shaped support rods in adjacent pairs are hinged to each other. The number of sliding blocks is the same as the number of arc-shaped support rod groups. A heating rod is fixedly disposed on the sliding block and located between two arc-shaped support rods in the same group. A connecting rod is vertically and fixedly disposed on the sliding block, with the other end of the connecting rod fixedly connected to the heating rod. The heating rod is vertically positioned. A rotating hole is formed in the middle of two arc-shaped support rods, and the connecting rod passes through the rotating hole of the two arc-shaped support rods to connect the two arc-shaped support rods to the sliding block. The heating rod also prevents the two arc-shaped support rods from detaching from the connecting rod. The ends of the plurality of arc-shaped support rods are elastically telescopic, and the length of the plurality of arc-shaped support rods is negatively correlated with the outer diameter of the casting machine head; The arc-shaped support rod includes a middle rod and two end sleeves. Both the middle rod and the two end sleeves are arc-shaped. The two end sleeves are slidably fitted onto the two ends of the middle rod. An elastic element is provided between the two end sleeves and the two ends of the middle rod. The elastic element has a tendency to push the two end sleeves away from each other.

2. The casting machine head heating device according to claim 1, characterized in that, The elastic element is a compression spring.

3. The casting machine head heating device according to claim 1, characterized in that, The heat-insulating shell is provided with an opening, and a locking component is provided at the opening, which is used to open or lock the opening.

4. The casting machine head heating device according to claim 3, characterized in that, The engaging assembly includes connecting blocks and bolts. There are two connecting blocks, which are fixedly installed on both sides of the opening of the insulation shell. Each connecting block has a connecting hole, and the bolt is threaded into the connecting hole.

5. The casting machine head heating device according to claim 4, characterized in that, An annular groove is provided on the inner wall of the insulation shell, and an annular frame is fixedly installed in the annular groove. There are two annular frames, both of which are semi-annular. One end of the two annular frames is hinged to each other, and the other end of the two annular frames is close to the opening of the insulation shell. Multiple sliding blocks are slidably installed on the two annular frames.

6. The casting machine head heating device according to claim 1, characterized in that, Rubber rings are provided at the upper and lower ends of the plurality of arc-shaped support rods. The outer circumference of the rubber rings seals against the inner wall of the insulation shell, and the inner circumference of the rubber rings seals against the outer circumference of the casting machine head.

7. The casting machine head heating device according to claim 1, characterized in that, A power cord is provided on the outer periphery of the insulation shell, and the power cord is electrically connected to multiple heating rods.

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