A kind of pipe shell mould for producing flame-retardant PIR pipe shell

Abstract

The utility model discloses a kind of pipe shell mould for flame-retardant PIR pipe shell production, it is related to PIR pipe shell production technical field.The utility model includes mould mechanism, the mould mechanism is used to generate a closed space for PIR pipe shell material solidification forming, the mould mechanism includes inner circle mould and four top caps;The left side and right side of the inner circle mould are equipped with mould side plate. The utility model is by being provided with die changing assembly, specifically is downwardly pressing button and pushing eccentric cam rotation, makes the hook of eccentric cam outer wall installation and rises, then inserts the inner circle mould into mould shell interior, makes square hole inserting rod insert into cam shell, then loosens button and is locked, so it can quickly replace inner circle mould, let staff can flexibly adjust the inner diameter of inner circle mould, its deployment is relatively simple to shorten equipment downtime, to further guarantee the production efficiency of equipment processing PIR pipe shell.

Description

Technical Field

[0001] This utility model belongs to the field of PIR tube shell production technology, and in particular relates to a tube shell mold for producing flame-retardant PIR tube shells. Background Technology

[0002] Flame-retardant PIR pipe shells are a type of thermal insulation material made of polyisocyanurate (PIR). They are widely used for thermal insulation of pipes and equipment. They have excellent flame-retardant properties, which can effectively prevent the spread of fire. At the same time, they also have good thermal insulation, high temperature resistance and corrosion resistance, making them suitable for use in industrial and construction fields.

[0003] Existing PIR tube shell production relies on molds, most of which are one-piece molded with limited inner diameter adjustment range. Producing PIR tube shells of different sizes requires installing molds of different specifications, which is complicated and leads to long equipment downtime, thus affecting the production efficiency of PIR tube shell processing. To address this, we propose a tube shell mold for flame-retardant PIR tube shell production. Utility Model Content

[0004] The purpose of this invention is to provide a mold for producing flame-retardant PIR tube shells. By setting up a mold-changing assembly, specifically by pressing down a button and pushing an eccentric cam to rotate, the hooks installed on the outer wall of the eccentric cam are raised. Then, the inner round mold is inserted into the mold housing, and the square-hole insert rod is inserted into the cam housing. Releasing the button locks it in place. This allows for quick replacement of the inner round mold, enabling workers to flexibly adjust its inner diameter. Its simple deployment reduces equipment downtime, thereby ensuring the production efficiency of PIR tube shell processing. This invention solves the problem of existing PIR tube shell production using molds, most of which are one-piece molded with limited inner diameter adjustment range. Producing PIR tube shells of different sizes requires installing different molds of varying specifications, resulting in complex deployment, long equipment downtime, and ultimately affecting the production efficiency of PIR tube shell processing.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a tube shell mold for producing flame-retardant PIR tube shells, including a mold mechanism. The mold mechanism is used to generate a closed space for PIR tube shell material to solidify and form. The mold mechanism includes an inner circular mold and four top covers.

[0007] The inner circular mold is equipped with mold side plates on both the left and right sides. The two mold side plates are mirror images of the inner circular mold. The front and back sides of the bottom of the mold side plates are equipped with protrusions.

[0008] All four top covers are disposed on the top of the inner circular mold, and the bottom outer wall of the four inner circular molds is in contact with the top outer wall of the inner circular mold;

[0009] The protrusion has a square hole insertion rod installed at the center of its bottom, and the square hole insertion rod has a slot at its center, which is rectangular.

[0010] Furthermore, the mold mechanism includes a mold changing component, which is used to change the size of the inner diameter of the mold mechanism;

[0011] A limiting component is disposed inside the mold changing component, and the limiting component is used to limit the vertical movement of the mold changing component;

[0012] A top cover assembly, wherein the top cover assembly is disposed on top of the mold changing assembly, and the top cover assembly is used to close the top area of ​​the mold changing assembly;

[0013] An auxiliary component is disposed on top of the top cover assembly and is used to guide the flow direction of the raw material in the PIR tube shell;

[0014] The outer wall of the top cover assembly abuts against the outer wall of the mold changing assembly.

[0015] Furthermore, the mold changing assembly includes a mold housing, which is fitted onto the outer side of the inner circular mold. Cam housings are installed on the left and right outer walls of the inner circular mold. The two cam housings are mirror images of the inner circular mold and are both located at the bottom center of the mold side plate. The bottom of the square-hole insert penetrates the cam housing and extends downwards into the interior. The outer wall of the square-hole insert is slidably connected to the inner wall of the cam housing at the penetration point. By setting the outer diameter of the inner circular mold to be the same as the inner diameter of the mold housing, the mold housing and the inner circular mold can fit tightly together, preventing the inner circular mold from shaking during processing.

[0016] The inner wall of the mold shell and the outer wall of the inner circular mold are both semi-circular curved surfaces, and the diameters of the semi-circular curved surfaces of the mold shell and the inner circular mold are the same.

[0017] Furthermore, the mold-changing assembly includes two eccentric cams, both of which are located at the center inside the cam housing. The two eccentric cams are arranged one in front of the other, with a protruding part on the side of the two eccentric cams that are close to each other, and a hook installed on the side of the two eccentric cams that are far from each other. The hook is inserted into the square hole of the square hole insert rod. A button is provided on the top of the eccentric cam, and the top of the button extends upward through the outer wall of the cam housing. Two push rods are installed at the bottom of the button, and the bottom outer wall of the push rod contacts the top outer wall of the eccentric cam. A slide rod one is provided at the bottom of the square hole insert rod, and a slide rod two is provided at the bottom of the eccentric cam. Both slide rod one and slide rod two extend downward through the bottom outer wall of the cam housing and are slidably connected. By setting a circular plate, the contact area between slide rod one and slide rod two and their top parts can be increased, allowing slide rod one and slide rod two to push the parts upward more smoothly.

[0018] Among them, spring one is sleeved on the outer side of slide rod one, and spring two is sleeved on the outer side of slide rod two. A circular plate is installed at the top center of slide rod one and slide rod two. The diameter of the circular plate is larger than the inner diameter of the circular hole through which the cam housing is penetrated. The circular plate is flexibly connected to the bottom inner wall of the cam housing through spring one and spring two.

[0019] Furthermore, the limiting component includes two T-shaped sliders, both of which are installed on the left and right sides of the bottom of the button, and the two T-shaped sliders are mirrored with respect to the button as the center; by setting the T-shaped sliders, the button can be limited from the left and right sides, so that the button is kept in the position of the center of the cam housing;

[0020] The limiting component includes two T-shaped slide rails, which are respectively opened on the top of the left and right inner walls of the cam housing. The T-shaped slider extends into the T-shaped slide rail and is slidably connected to the T-shaped slide rail. Both the T-shaped slider and the T-shaped slide rail are T-shaped.

[0021] Furthermore, the top cover assembly includes four U-shaped protrusions and four trapezoidal support plates. The U-shaped protrusions are installed on the top of the top cover near the outer wall of the mold shell, and the four trapezoidal support plates are all installed on the outer wall of the mold shell. The top of the U-shaped protrusions is rotatably connected to the square-round protrusion plate. A square-round protrusion plate is installed at the center of the top of the U-shaped protrusions, and a pull ring is rotatably connected at the center of the top of the square-round protrusion plate. A rotating ring is rotatably connected at the center of the bottom of the trapezoidal support plate on the side away from the top cover. An electric actuator is installed on the inner wall of the rotating ring, and the coupling at the top output end of the electric actuator is installed on the bottom outer wall of the pull ring. By setting the rotating ring, the electric actuator can rotate to a certain extent, preventing the output end of the electric actuator from jamming due to inability to rotate.

[0022] The trapezoidal support plate has a rectangular slot on the outer side of the rotating ring, and the size of the trapezoidal support plate is larger than the range of motion of the electric actuator.

[0023] Furthermore, the auxiliary component includes a flow guide hole, which is located at the center of the bottom of the top cover. The outer side of the flow guide hole has a U-shaped groove, and the inner side of the flow guide hole has an arc groove. The top center of the four top covers, which are close to each other, has a round hole. The four flow guide holes are connected together through the U-shaped groove, the arc groove, and the round hole. By setting the flow guide hole, the material can enter the interior of the inner round mold evenly, preventing excessive or insufficient material in some areas of the inner round mold, and ensuring the production quality of the equipment.

[0024] The auxiliary component includes a push rod housing, which is sleeved on the outer side of the bottom of the electric push rod. The top outer wall of the push rod housing is installed on the bottom outer wall of the trapezoidal support plate. A pad is installed on the back of the push rod housing, and the back outer wall of the pad is installed on the outer wall of the mold housing. The pad is trapezoidal in shape.

[0025] This utility model has the following beneficial effects:

[0026] This invention features a mold-changing assembly. Specifically, pressing down on a button rotates an eccentric cam, causing a hook mounted on the outer wall of the eccentric cam to lift. The inner round mold is then inserted into the mold housing, and a square-hole insert rod is inserted into the cam housing. Releasing the button locks the mold in place. This allows for quick replacement of the inner round mold, enabling workers to flexibly adjust its inner diameter. The assembly is simple, reducing equipment downtime and ensuring efficient PIR tube processing.

[0027] This invention features a top cover assembly. Specifically, by activating an electric actuator, the output end of the actuator pushes a square-round convex plate upwards via a pull ring. This causes the square-round convex plate to rotate, which in turn rotates the U-shaped protrusion fixedly connected at the bottom. This rotation causes the top cover to rotate, allowing the bottom of the top cover to fit against the top of the mold shell and the inner round mold. This effectively seals the top of the inner round mold, preventing dust and other impurities from falling into the PIR tube shell during production and ensuring the quality of the PIR tube shells produced by the equipment.

[0028] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall front structure of this utility model;

[0031] Figure 2 This is a schematic diagram of the inner circular mold structure of this utility model;

[0032] Figure 3 This is a schematic cross-sectional view of the cam housing of this utility model;

[0033] Figure 4 This is a schematic diagram of the trapezoidal support structure of this utility model;

[0034] Figure 5 This is a schematic diagram of the arc groove structure of this utility model.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Mold mechanism; 11. Mold changing assembly; 111. Mold shell; 112. Inner round mold; 1131. Mold side plate; 1132. Protrusion; 1133. Square hole insert rod; 114. Cam shell; 1151. Eccentric cam; 1152. Hook; 1161. Button; 1162. Push rod; 1171. Slide rod one; 1172. Slide rod two; 1181. Spring one; 1182. Spring two; 119. 12. Circular plate; 12. Limiting component; 121. T-shaped slider; 122. T-shaped slide rail; 13. Top cover assembly; 131. Top cover; 132. U-shaped protrusion; 133. Trapezoidal support plate; 134. Square and round protrusion plate; 135. Pull ring; 136. Electric push rod; 137. Rotary ring; 14. Auxiliary component; 141. Guide hole; 142. I-shaped groove; 143. Arc groove; 144. Push rod housing; 145. Pad block. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0038] Please see Figures 1-5As shown, this utility model is a mold for producing flame-retardant PIR tube shells, including a mold mechanism 1. The mold mechanism 1 is used to generate a sealed space for the solidification and forming of PIR tube shell material. The mold mechanism 1 includes an inner circular mold 112 and four top covers 131. Mold side plates 1131 are installed on the left and right sides of the inner circular mold 112. The two mold side plates 1131 are mirror images of the inner circular mold 112. Protrusions 1132 are installed on the front and back sides of the bottom of the mold side plates 1131. The four top covers 131 are all located on the top of the inner circular mold 112. The bottom outer walls of the four inner circular molds 112 are in contact with the top outer walls of the inner circular molds 112. A square hole insertion rod 1133 is installed at the bottom center of the protrusion 1132. A slot is opened at the center of the square hole insertion rod 1133. The slot of the square hole insertion rod 1133 is rectangular. The mold mechanism 1 includes a mold changing assembly 11, which is used to change the inner diameter of the mold mechanism 1; a limiting assembly 12, which is disposed inside the mold changing assembly 11 and is used to limit the vertical movement of the mold changing assembly 11; a top cover assembly 13, which is disposed on top of the mold changing assembly 11 and is used to close the top area of ​​the mold changing assembly 11; an auxiliary assembly 14, which is disposed on top of the top cover assembly 13 and is used to guide the flow direction of the raw material of the PIR tube shell; and the outer wall of the top cover assembly 13 abuts against the outer wall of the mold changing assembly 11. The mold changing assembly 11 includes a mold housing 111, which is fitted onto the outside of the inner circular mold 112. Cam housings 114 are installed on the left and right outer walls of the inner circular mold 112. The two cam housings 114 are mirror images of the inner circular mold 112. Both cam housings 114 are located at the bottom center of the mold side plate 1131. The bottom of the square hole insert rod 1133 passes through the cam housing 114 and extends downward into the interior. The outer wall of the square hole insert rod 1133 is slidably connected to the inner wall of the cam housing 114 at the point where it is passed through. The inner wall of the mold housing 111 and the outer wall of the inner circular mold 112 are both semi-circular curved surfaces. The diameters of the semi-circular curved surfaces of the mold housing 111 and the inner circular mold 112 are the same.The mold changing assembly 11 includes two eccentric cams 1151, both of which are located at the center inside the cam housing 114. The two eccentric cams 1151 are arranged one in front of the other, with a protruding part on the side of the two eccentric cams that are closer to each other, and a hook 1152 is installed on the side of the two eccentric cams that are farther apart. The hook 1152 is inserted into the square hole of the square hole insertion rod 1133. A button 1161 is provided on the top of the eccentric cam 1151. The top of button 1161 extends upward through the outer wall of the cam housing 114. Two push rods 1162 are mounted at the bottom of button 1161. The bottom outer wall of push rod 1162 contacts the top outer wall of the eccentric cam 1151. A slide rod 1171 is located at the bottom of the square hole insert rod 1133, and a slide rod 1172 is located at the bottom of the eccentric cam 1151. Both slide rod 1171 and slide rod 1172 extend downward through the bottom outer wall of the cam housing 114 and are slidably connected. Pressing button 1 downward... 161 pushes the eccentric cam 1151 to rotate, causing the hook 1152 installed on the outer wall of the eccentric cam 1151 to lift up. Then, the inner round mold 112 is inserted into the mold housing 111, so that the square hole insertion rod 1133 is inserted into the cam housing 114. Then, the button 1161 is released to lock it. This allows for quick replacement of the inner round mold 112, enabling workers to flexibly adjust the inner diameter of the inner round mold 112. Its deployment is relatively simple, reducing equipment downtime. The length is short, thus ensuring the production efficiency of the equipment in processing PIR tube shells; a spring 1181 is sleeved on the outer side of slide rod 1171, and a spring 1182 is sleeved on the outer side of slide rod 2172. A circular plate 119 is installed at the top center of slide rod 1171 and slide rod 2172. The diameter of the circular plate 119 is larger than the inner diameter of the circular hole through which the cam housing 114 is penetrated. The circular plate 119 is flexibly connected to the bottom inner wall of the cam housing 114 through spring 1181 and spring 2182. The limiting component 12 includes two T-shaped sliders 121, which are installed on the left and right sides of the bottom of the button 1161. The two T-shaped sliders 121 are mirror images of the button 1161. The limiting component 12 also includes two T-shaped slide rails 122, which are respectively opened on the top of the left and right inner walls of the cam housing 114. The T-shaped sliders 121 extend into the T-shaped slide rails 122 and are slidably connected to the T-shaped slide rails 122. Both the T-shaped sliders 121 and the T-shaped slide rails 122 are T-shaped.The top cover assembly 13 includes four U-shaped protrusions 132 and four trapezoidal support plates 133. The U-shaped protrusions 132 are installed on the top of the top cover 131 near the outer wall of the mold housing 111. The four trapezoidal support plates 133 are all installed on the outer wall of the mold housing 111. The top of the U-shaped protrusions 132 is rotatably connected to the top of the square-round protrusion 134. The square-round protrusion 134 is installed at the center of the top of the U-shaped protrusions 132. A pull ring 135 is rotatably connected at the center of the top of the square-round protrusion 134. A rotating ring 137 is rotatably connected at the center of the bottom of the trapezoidal support plate 133 on the side away from the top cover 131. An electric push rod 136 is installed on the inner wall of the rotating ring 137. A coupling is located at the top output end of the electric push rod 136. Installed on the bottom outer wall of the pull ring 135; the electric push rod 136 is activated, so that the output end of the electric push rod 136 pushes the square and round convex plate 134 upward through the pull ring 135, so that the square and round convex plate 134 drives the U-shaped convex block 132 fixedly connected at the bottom to rotate, and then drives the top cover 131 to rotate, so that the bottom of the top cover 131 fits with the top of the mold shell 111 and the inner round mold 112. This can seal the top of the inner round mold 112, preventing dust and other impurities from falling in during the production of PIR tube shells, and ensuring the quality of PIR tube shells produced by the equipment; the trapezoidal support plate 133 has a rectangular slot on the outside of the rotating ring 137, and the size of the trapezoidal support plate 133 is larger than the range of motion of the electric push rod 136. The auxiliary component 14 includes a flow guide hole 141, which is located at the center of the bottom of the top cover 131. A U-shaped groove 142 is provided on the outer side of the flow guide hole 141, and an arc groove 143 is provided inside the flow guide hole 141. A circular hole is provided at the center of the top of the four top covers 131 that are close to each other on one side. The four flow guide holes 141 are connected together through the U-shaped groove 142, the arc groove 143, and the circular hole. The auxiliary component 14 includes a push rod housing 144, which is sleeved on the outer side of the bottom of the electric push rod 136. The top outer wall of the push rod housing 144 is installed on the bottom outer wall of the trapezoidal support plate 133. A pad 145 is installed on the back of the push rod housing 144. The back outer wall of the pad 145 is installed on the outer wall of the mold housing 111. The pad 145 is trapezoidal in shape.

[0039] A specific application of this embodiment is as follows: In use, first confirm the production specifications of the PIR tube shell according to the actual production needs, then take out the inner circle mold 112 that conforms to the PIR tube shell specifications, then move the inner circle mold 112 above the mold shell 111, so that the protrusion 1132 is aligned with the top of the cam shell 114, then press down the button 1161, so that the bottom of the button 1161 slides down along the T-shaped slide rail 122 through the T-shaped sliders 121 installed on the left and right sides, and pushes the two eccentric cams 1151 at the bottom to rotate through the push rod 1162, so that both eccentric cams 1151 are driven. The hook 1152 rotates in the opposite direction, causing the hook 1152 to rise. When the eccentric cam 1151 rotates, it will press down on the slide bar 1172, causing the slide bar 1172 to slide down and press the spring 1182. Then, the inner round mold 112 moves down and the square hole insert rod 1133 is inserted into the cam housing 114. Then, the button 1161 is released, causing the spring 1182 to drive the slide bar 1172 to move up and push the eccentric cam 1151 to reset, so that the hook 1152 is inserted into the square hole of the square hole insert rod 1133, locking the mold housing 111 and the inner round mold 112 together.

[0040] Next, the electric actuator 136 is activated, causing the top output end of the electric actuator 136 to push the pull ring 135 upward through the coupling. The pull ring 135 then pushes the square and round convex plate 134 upward to rotate, causing the bottom of the square and round convex plate 134 to drive the U-shaped protrusion 132 to rotate. The U-shaped protrusion 132 rotates along the top of the trapezoidal support plate 133. While rotating, the U-shaped protrusion 132 will drive the top cover 131 to flip to one side of the top of the inner round mold 112, thus sealing the top of the inner round mold 112.

[0041] Finally, the raw material for the PIR tube shell is injected into the round hole at the center of the top of the four top covers 131, which is close to one side. The raw material will flow along the inner wall of the shaped groove 142 and the arc groove 143 to the four guide holes 141, and finally flow into the inner round mold 112 from the guide holes 141. After the raw material is formed inside the inner round mold 112, the top cover 131 is reset, so that the top of the inner round mold 112 is reopened. Then the processed PIR tube shell is taken out and enters the next production stage.

[0042] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0043] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A mold for producing flame-retardant PIR tube shells, characterized in that, include: The mold mechanism (1) is used to generate a closed space for the solidification of PIR tube shell material. The mold mechanism (1) includes an inner circular mold (112) and four top covers (131). The inner circular mold (112) is equipped with mold side plates (1131) on both the left and right sides. The two mold side plates (1131) are mirror images of the inner circular mold (112) with respect to the center. The mold side plates (1131) are equipped with protrusions (1132) on both the front and back sides of the bottom. The four top covers (131) are all disposed on the top of the inner circular mold (112), and the bottom outer wall of the four inner circular molds (112) is in contact with the top outer wall of the inner circular mold (112); Among them, a square hole insertion rod (1133) is installed at the bottom center of the protrusion (1132), and a slot is opened at the center of the square hole insertion rod (1133). The slot of the square hole insertion rod (1133) is rectangular.

2. The tube shell mold for producing flame-retardant PIR tube shells according to claim 1, characterized in that, The mold mechanism (1) includes a mold changing component (11), which is used to change the size of the inner diameter of the mold mechanism (1); A limiting component (12) is disposed inside the mold changing component (11) and is used to limit the vertical movement of the mold changing component (11). Top cover assembly (13), the top cover assembly (13) is disposed on the top of the mold changing assembly (11), the top cover assembly (13) is used to close the top area of ​​the mold changing assembly (11); An auxiliary component (14) is disposed on top of the top cover assembly (13) and is used to guide the flow direction of the raw material in the PIR tube shell. The outer wall of the top cover assembly (13) abuts against the outer wall of the mold changing assembly (11).

3. The tube shell mold for producing flame-retardant PIR tube shells according to claim 2, characterized in that, The mold changing assembly (11) includes a mold housing (111), which is sleeved on the outside of the inner circular mold (112). Cam housings (114) are installed on the left and right outer walls of the inner circular mold (112). The two cam housings (114) are mirror images of the inner circular mold (112) and are located at the bottom center of the mold side plate (1131). The bottom of the square hole insert (1133) penetrates the cam housing (114) and extends downward into the interior. The outer wall of the square hole insert (1133) is slidably connected to the inner wall of the cam housing (114) at the penetration point. The inner wall of the mold shell (111) and the outer wall of the inner circular mold (112) are both semi-circular curved surfaces, and the diameters of the semi-circular curved surfaces of the mold shell (111) and the inner circular mold (112) are the same.

4. The tube shell mold for producing flame-retardant PIR tube shells according to claim 2, characterized in that, The mold changing assembly (11) includes two eccentric cams (1151), both of which are located at the center inside the cam housing (114). The two eccentric cams (1151) are arranged one in front of the other. The side of the two eccentric cams that are close to each other is a protruding part, and the side of the two eccentric cams that are far apart from each other is equipped with a hook (1152). The hook (1152) is inserted into the square hole of the square hole insertion rod (1133). A button (1161) is provided on the top of the eccentric cam (1151). The top of the button (1161) extends through the outer wall of the cam housing (114) and upwards. Two push rods (1162) are installed at the bottom of the button (1161). The bottom outer wall of the push rod (1162) contacts the top outer wall of the eccentric cam (1151). The bottom of the square hole insert (1133) is provided with a slide rod one (1171), and the bottom of the eccentric cam (1151) is provided with a slide rod two (1172). Both the slide rod one (1171) and the slide rod two (1172) extend downwards through the bottom outer wall of the cam housing (114) and are slidably connected. Among them, spring 1 (1181) is sleeved on the outer side of slide rod 1 (1171), and spring 2 (1182) is sleeved on the outer side of slide rod 2 (1172). A circular plate (119) is installed at the top center of slide rod 1 (1171) and slide rod 2 (1172). The diameter of the circular plate (119) is larger than the inner diameter of the circular hole through which the cam housing (114) is penetrated. The circular plate (119) is flexibly connected to the bottom inner wall of the cam housing (114) through spring 1 (1181) and spring 2 (1182).

5. A tube shell mold for producing flame-retardant PIR tube shells according to claim 2, characterized in that, The limiting component (12) includes two T-shaped sliders (121), both of which are installed on the left and right sides of the bottom of the button (1161), and the two T-shaped sliders (121) are mirrored with respect to the button (1161). The limiting component (12) includes two T-shaped slide rails (122), which are respectively opened on the top of the left and right inner walls of the cam housing (114). The T-shaped slider (121) extends into the T-shaped slide rail (122) and is slidably connected to the T-shaped slide rail (122). Both the T-shaped slider (121) and the T-shaped slide rail (122) are T-shaped.

6. A tube shell mold for producing flame-retardant PIR tube shells according to claim 2, characterized in that, The top cover assembly (13) includes four U-shaped protrusions (132) and four trapezoidal support plates (133). The U-shaped protrusions (132) are installed on the top of the top cover (131) near the outer wall of the mold shell (111). The four trapezoidal support plates (133) are all installed on the outer wall of the mold shell (111). The top of the U-shaped protrusions (132) is rotatably connected to the top of the square-round protrusion plate (134). The U-shaped protrusions (132) have... A square-round convex plate (134) is installed at the top center. A pull ring (135) is rotatably connected at the top center of the square-round convex plate (134). A rotating ring (137) is rotatably connected at the bottom center of the trapezoidal support plate (133) on the side away from the top cover (131). An electric push rod (136) is installed on the inner wall of the rotating ring (137). The coupling at the top output end of the electric push rod (136) is installed on the bottom outer wall of the pull ring (135). The trapezoidal support plate (133) has a rectangular slot on the outside of the rotating ring (137), and the size of the trapezoidal support plate (133) is larger than the range of motion of the electric push rod (136).

7. A tube shell mold for producing flame-retardant PIR tube shells according to claim 2, characterized in that, The auxiliary component (14) includes a flow guide hole (141), which is located at the center of the bottom of the top cover (131). A shaped groove (142) is provided on the outside of the flow guide hole (141), and an arc groove (143) is provided inside the flow guide hole (141). A round hole is provided at the center of the top of the four top covers (131) that are close to each other. The four flow guide holes (141) are connected together through the shaped groove (142), the arc groove (143), and the round hole. The auxiliary component (14) includes a push rod housing (144), which is sleeved on the outer side of the bottom of the electric push rod (136). The top outer wall of the push rod housing (144) is installed on the bottom outer wall of the trapezoidal support plate (133). A pad (145) is installed on the back of the push rod housing (144), and the back outer wall of the pad (145) is installed on the outer wall of the mold housing (111). The pad (145) is trapezoidal in shape.

Images