High-speed rail under pre-bury sleeve injection mold

Abstract

The application discloses a high-iron-rail-under pre-buried sleeve injection mold, which comprises a fixed mold, a movable mold and a top rod, the fixed mold and the movable mold are attached together, and a mold cavity is formed between the fixed mold and the movable mold; the top rod penetrates through the movable mold and extends into the mold cavity; a cavity channel is arranged in the movable mold and used for the top rod to penetrate through; and a side edge supporting structure is arranged on the top rod, wherein the side edge supporting structure comprises a side edge groove arranged on the side of the top rod, a support spring is arranged between the side edge groove and an auxiliary rod which is hinged to one end of the groove bottom of the side edge groove and away from the end of the top rod, and the auxiliary rod is contracted in the side edge groove under the lateral pressure of the cavity channel inner wall; after the top rod extends out of the cavity channel, the top end of the auxiliary rod moves out of the side edge groove under the pushing force of the support spring, the auxiliary rod extends out of the side of the top rod, the top of the auxiliary rod is flush with the top of the top rod, the auxiliary rod cooperates with the top rod, and the workpiece is pushed by multiple points, so that better ejection effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of injection mold technology, specifically to an injection mold for a pre-embedded sleeve under a high-speed railway track. Background Technology

[0002] High-speed rail embedded sleeves are plastic sleeves with good mechanical strength, heat resistance, wear resistance, and high rigidity, pre-embedded in the fixing holes of track spikes in high-speed rail sleepers. High-speed rail embedded sleeves have advantages such as simple and convenient construction and long service life, improving the durability, insulation, environmental protection level, and overall technical and economic indicators of high-speed rail sleepers, meeting the requirements of the rapid development of high-speed rail technology. High-speed rail embedded sleeves are typically manufactured using injection molding processes.

[0003] Injection molds have ejection systems, typically using ejector pins to eject the product. Due to the limited area of ​​the ejector pins, the product experiences significant pressure during ejection, potentially causing damage. Furthermore, limited by the internal space of the mold, although multiple ejector pins can eject the product simultaneously, the pressure within the same area remains high, still posing a risk of product damage.

[0004] The demolding process can be divided into two parts: lifting and ejection. If the pressure of the ejector pin is too high, the lifting process may damage the product, and the damage will continue as the product is ejected, resulting in even greater damage. Summary of the Invention

[0005] The purpose of this invention is to provide an injection mold for a pre-embedded sleeve under a high-speed railway track, in order to solve the problem that in the prior art, the demolding process can be divided into two parts: lifting and ejection. If the pressure of the ejector pin is large, the lifting process may damage the product, and the damage continues as the product is ejected, thus causing greater damage.

[0006] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: a high-speed railway track pre-embedded sleeve injection mold, including a fixed template and a movable template, the fixed template and the movable template are opposite to each other, a fixed mold is installed on the fixed template, a movable mold is installed on the movable template, the fixed mold and the movable mold are opposite to each other, and when the fixed mold and the movable mold are fitted together, there is a cavity between them;

[0007] The moving mold and the moving template are connected by a base. There is an ejection cavity between the moving mold and the moving template. A push plate is provided in the ejection cavity. An ejector rod is installed on the push plate. The ejector rod passes through the moving mold and extends into the cavity. A hydraulic cylinder for pushing the push plate is provided in the ejection cavity. A cavity for the ejector rod to pass through is provided in the moving mold.

[0008] The push rod is provided with a side support structure, which includes a side groove provided on the side of the push rod. An auxiliary rod is hinged to the bottom of the side groove away from the end of the push rod. A support spring is provided between the auxiliary rod and the bottom of the side groove. The auxiliary rod retracts into the side groove under the lateral pressure of the inner wall of the cavity. A limit plate is provided at the bottom of the side groove.

[0009] After the top rod extends out of the cavity, the auxiliary rod moves its top end out of the side groove under the thrust of the support spring. When the top rod pushes the product, the auxiliary rod assists in pushing the product.

[0010] As a preferred embodiment of the present invention, the top end of the auxiliary rod is provided with a sliding plate, the width of the sliding plate being greater than the width of the auxiliary rod, and the top of the side groove is provided with a top receiving groove for accommodating the sliding plate.

[0011] As a preferred embodiment of the present invention, there is an inclination angle between the pushing plate and the auxiliary rod, and the auxiliary rod is a telescopic structure. After the auxiliary rod extends a predetermined distance, the pushing plate is flush with the top of the top rod.

[0012] As a preferred embodiment of the present invention, the auxiliary rod includes a mounting cylinder and an extension rod inserted into the mounting cylinder. The mounting cylinder is a cylindrical structure with an open top, and the bottom of the mounting cylinder is hinged to the side groove.

[0013] An extension assembly is provided between the mounting cylinder and the extension rod. Driven by the extension assembly, the upper part of the extension rod extends out of the mounting cylinder, thereby extending the auxiliary rod.

[0014] As a preferred embodiment of the present invention, a switch assembly is provided between the extension rod and the mounting cylinder. When the extension rod extends to the point where the end of the push plate is flush with the end of the top rod, the output end of the switch assembly extends to keep the extension rod in this state to facilitate its extension.

[0015] As a preferred embodiment of the present invention, the protruding component includes a side groove disposed on the side of the mounting cylinder, a side slide block slidably disposed in the side groove, and the side slide block being provided with a serrated pad.

[0016] Rolling wheels are horizontally arranged at both ends of the side slide groove, and a belt is wound between the two rolling wheels. The side slide is connected to the belt. When the side slide moves, it can drive the belt to rotate around the two rolling wheels, thereby causing the rolling wheels to rotate.

[0017] As a preferred embodiment of the present invention, the outer surface of the belt is provided with a side rack, the cylinder body of the mounting cylinder is provided with a side drive groove, the extension rod is provided with a side tooth groove on the rod body facing the side drive groove, one of the rolling wheels is provided with a side gear on one side, the side gear meshes with the side rack, and the lower part of the side gear passes through the side drive groove and meshes with the side tooth groove.

[0018] In a preferred embodiment of the present invention, the side slide is connected to the switch assembly;

[0019] The switch assembly includes a hollow cylindrical locking cylinder, which is vertically disposed on the side of the mounting cylinder. The inner cavity of the locking cylinder is connected to the inner cavity of the mounting cylinder. A drive slot is provided on the side wall of the locking cylinder. A locking rod is disposed inside the locking cylinder. A drive tooth groove is provided on the rod body facing the drive slot. A drive frame is disposed outside the locking cylinder and is fixed on the mounting cylinder. A drive gear is disposed on the drive frame. The drive gear extends through the drive slot into the locking cylinder and meshes with the drive tooth groove.

[0020] As a preferred embodiment of the present invention, a drive rack is provided on the side wall of the side slide, and the drive rack is connected to the drive gear through a transmission rod;

[0021] The transmission rod has transmission gears at both ends, and the two transmission gears mesh with the drive gear and the drive rack, respectively.

[0022] As a preferred embodiment of the present invention, the side groove and the top receiving groove are provided on each side of the top rod;

[0023] The auxiliary rods provided on each side are of different lengths, so the positions of each of the top receiving slots on the top rod are different and do not affect each other;

[0024] The tilt angles of each of the auxiliary rods are different, and the longer the auxiliary rod, the larger its tilt angle, so that when each of the auxiliary rods is unfolded, it is flush with the top of the top rod.

[0025] Similarly, the angles between each of the pushing plates and the corresponding auxiliary rods are not the same; the longer the auxiliary rod, the smaller the angle between it and the pushing plate.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] This invention features a side support structure in which an auxiliary rod is retractably housed in the side of a push rod. When the push rod extends into the cavity to push the workpiece, after lifting the workpiece, the auxiliary rod extends from the side of the push rod, with its top flush with the top of the push rod. The auxiliary rod cooperates with the push rod to push the workpiece out at multiple points, reducing the pressure on the product during the ejection process and avoiding further damage to the product, thus achieving a better ejection effect. Attached Figure Description

[0028] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the top rod structure according to an embodiment of the present invention;

[0031] Figure 3 This is a cross-sectional schematic diagram of the top rod according to an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the auxiliary rod when it is deployed according to an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure when the top receiving groove is misaligned according to an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the protruding component according to an embodiment of the present invention;

[0035] Figure 7 This is a detailed structural diagram of the protruding component according to an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the side slide of an embodiment of the present invention;

[0037] Figure 9 This is a schematic diagram of the structure of the switch assembly according to an embodiment of the present invention;

[0038] Figure 10 This is a detailed structural diagram of the switch assembly according to an embodiment of the present invention.

[0039] The labels in the diagram represent the following:

[0040] 1-Side support structure; 2-Fixed template; 3-Moving template; 4-Fixed mold; 5-Moving mold; 6-Cavity; 7-Base; 8-Ejection cavity; 9-Push plate; 10-Ejector rod; 11-Hydraulic cylinder; 12-Cavity passage; 13-Limiting plate;

[0041] 101-Side groove; 102-Auxiliary rod; 103-Support spring; 104-Push plate; 105-Top receiving groove; 106-Extending assembly; 107-Switch assembly; 108-Drive rack; 109-Transmission rod; 110-Transmission gear;

[0042] 1021 - Mounting cylinder; 1022 - Extension rod;

[0043] 1061-Side slide groove; 1062-Side slide block; 1063-Rolling wheel; 1064-Belt; 1065-Side rack; 1066-Side drive groove; 1067-Side tooth groove; 1068-Side gear; 1069-Pad;

[0044] 1071-Locking cylinder; 1072-Drive slot; 1073-Locking rod; 1074-Drive tooth groove; 1075-Drive frame; 1076-Drive gear. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] like Figure 1 Of Figure 10 As shown, the present invention provides an injection mold for a pre-embedded sleeve under a high-speed rail, including a fixed mold plate 2 and a movable mold plate 3. The fixed mold plate 2 and the movable mold plate 3 are opposite to each other. A fixed mold 4 is installed on the fixed mold plate 2, and a movable mold 5 is installed on the movable mold plate 3. The fixed mold 4 and the movable mold 5 are opposite to each other. When the fixed mold 4 and the movable mold 5 are fitted together, there is a cavity 6 between them. The movable mold 5 and the movable mold plate 3 are connected by a base 7. There is an ejection cavity 8 between the movable mold 5 and the movable mold plate 3. A push plate 9 is provided in the ejection cavity 8. An ejector rod 10 is installed on the push plate 9. The ejector rod 10 passes through the movable mold 5 and extends into the cavity 6. A hydraulic cylinder 11 for pushing the push plate 9 to move is provided in the ejection cavity 8. A cavity 12 for the ejector rod 10 to pass through is provided in the movable mold 5.

[0047] Because the ejector pin 10 has a small area, the pressure it applies when pushing the workpiece is concentrated at its top, resulting in greater pressure on the workpiece and the potential for product damage. The demolding process can be divided into two parts: lifting and ejection. If the product is damaged during the lifting process, and the ejection process is not improved, the damage will continue as the product is ejected, leading to even greater damage.

[0048] In view of this, such as Figure 3 As shown, a side support structure 1 is provided on the push rod 10. The side support structure 1 includes a side groove 101 provided on the side of the push rod 10. An auxiliary rod 102 is hinged to the bottom of the side groove 101 away from the end of the push rod 10. A support spring 103 is provided between the auxiliary rod 102 and the bottom of the side groove 101. The auxiliary rod 102 retracts into the side groove 101 under the lateral pressure of the inner wall of the cavity 12. After the push rod 10 extends out of the cavity 12, the top end of the auxiliary rod 102 moves out of the side groove 101 under the thrust of the support spring 103. When the push rod 10 pushes the product, the auxiliary rod 102 assists in pushing the product.

[0049] With the auxiliary rod 102 structure described above, the area of ​​force applied is increased while the force driving the push rod 10 remains unchanged, thus reducing the pressure on the product. At the same time, after the auxiliary rod 102 is deployed, it is located around the push rod 10, which can disperse the contact points and push the workpiece at multiple points, thereby protecting the product during the ejection process and avoiding further damage to the product during ejection, thus achieving a better ejection effect.

[0050] To better promote the product, such as Figure 4 As shown, a pushing plate 104 is provided at the top of the auxiliary rod 102. The width of the pushing plate 104 is greater than the width of the auxiliary rod 102, thereby increasing the pushing area of ​​the auxiliary rod 102.

[0051] Since the auxiliary rod 102 is housed in the side groove 101, it needs to rotate by a certain angle at the center of its intersection with the side groove 101 when unfolded. Therefore, in order to ensure that the plane of the push plate 104 is at the same angle as the plane of the top of the top rod 101, the tilt angle between the push plate 104 and the auxiliary rod 102 is as follows: Specifically, the angle between the push plate 104 and the auxiliary rod 102 plus the angle between the auxiliary rod 102 and the top rod 101 should be 90°.

[0052] Similarly, since the auxiliary rod 102 is housed in the side groove 101, it needs to rotate a certain angle at the center of its intersection with the side groove 101 when unfolded. After unfolding, the end of the auxiliary rod 102 is not on the same plane as the top of the top rod 101. Therefore, the auxiliary rod 102 is a telescopic structure, which also extends forward a certain distance when the auxiliary rod 102 is unfolded, so that its top is flush with the top of the top rod 10 after unfolding, in order to assist in pushing it out.

[0053] To further enhance the auxiliary function of the side support structure 1, side grooves 101 and auxiliary rods 102 are provided on each side of the top rod 10, and the auxiliary rods 102 are evenly distributed around the top rod 10 after being unfolded.

[0054] It should be noted that, as Figure 4 As shown, a limiting plate 13 is provided at the bottom of the side groove 101. The limiting plate 13 is flush with the surface of the top rod 10. After the auxiliary rod 102 flips outward to a certain angle, the limiting plate prevents the auxiliary rod 102 from continuing to flip outward, thereby limiting the maximum flipping angle of the auxiliary rod 102. As a result, it stops flipping after contacting the workpiece and applies a pushing force to the workpiece.

[0055] In this embodiment, to enhance the pushing capability of the auxiliary rod 102, a pushing plate 104 is installed at its end. To accommodate the pushing plate 104, a top receiving groove 105 is provided at the top of the side groove 101. Figure 5 As shown, when the auxiliary rod 102 retracts into the side groove 101, the push plate 104 also enters the top receiving groove 105. The width of the push plate 104 is greater than that of the auxiliary rod 102, so the width and depth of the top receiving groove 105 are also greater than those of the auxiliary rod 102. As a result, the top receiving grooves 105 on different sides will partially overlap, making it impossible to accommodate all the push plates 104 at the same time.

[0056] Therefore, the lengths of the auxiliary rods 102 provided on each side of this embodiment are different, so that the positions of each top receiving groove 105 on the top rod 10 are different and do not affect each other.

[0057] The tilt angles of each auxiliary rod 102 are different. The longer the auxiliary rod 102, the larger its tilt angle, so that when each auxiliary rod 102 is unfolded, it is flush with the top of the top rod 10.

[0058] Similarly, the angles between each push plate 104 and the corresponding auxiliary rod 102 are not the same. The auxiliary rod 102 with a longer length has a smaller angle with the push plate 104.

[0059] Furthermore, in this embodiment, the length of each auxiliary rod 102 can be set to be the same, but the length that each auxiliary rod 102 can extend and retract is different. The one that can extend longer has a shorter length when it retracts. The side groove 101 is shorter and the top receiving groove 105 is lower. In this way, the top receiving grooves 105 can still be staggered.

[0060] Furthermore, in the above embodiment, since each auxiliary rod 102 has the same length when extended, each pushing plate 104 can be evenly distributed around the top rod 10.

[0061] In this embodiment, the auxiliary rod 102 is a telescopic structure, such as... Figure 4 As shown, it includes a mounting cylinder 1021 and an extension rod 1022 inserted into the mounting cylinder 1021. The mounting cylinder 1021 is a cylindrical structure with an open top. The bottom of the mounting cylinder 1021 is hinged to the side groove 101. An extension assembly 106 is provided between the mounting cylinder 1021 and the extension rod 1022. Driven by the extension assembly 106, the upper part of the extension rod 1022 extends out of the mounting cylinder 1021, so that the auxiliary rod 102 extends.

[0062] Furthermore, such as Figure 6 and Figure 7 As shown, the extension assembly 106 includes a side groove 1061 disposed on the side of the mounting cylinder 1021. A side slide block 1062 is slidably disposed within the side groove 1061. The side slide block 1062 is provided with a serrated pad 1069. Rollers 1063 are horizontally disposed at both ends of the side groove 1061. A belt 1064 is wound between the two rollers 1063. The side slide block 1062 is connected to the belt 1064. When the side slide block 1062 moves, it can drive the belt 1064 to rotate around the two rollers 1063. 3. Rotation causes the rolling wheel 1063 to rotate. The outer surface of the belt 1064 is provided with a side rack 1065. The cylinder body of the mounting cylinder 1021 is provided with a side drive groove 1066. The rod body of the extension rod 1022 facing the side drive groove 1066 is provided with a side tooth groove 1067. One of the rolling wheels 1063 is provided with a side gear 1068 on one side. The side gear 1068 meshes with the side rack 1065. The lower part of the side gear 1068 passes through the side drive groove 1066 and meshes with the side tooth groove 1067.

[0063] It is worth noting that in this embodiment, the movement of the side slide 1062 is related to the movement of the push rod 10. When the push rod 10 is pushed out, its front end extends and disengages from the cavity 12, and the top receiving groove 105 also disengages from the cavity 12. Under the thrust of the support spring 103, the auxiliary rod 102 begins to extend, and the outer side of the auxiliary rod 102 is in close contact with the outlet corner of the cavity 12. As the push rod 12 moves, the outer side of the auxiliary rod 102 is always in close contact with the outlet corner of the cavity 12. When the side slide 1062 contacts the corner, the serrated pad 1069 provided on it causes friction, and the outlet corner of the cavity 12 hinders the movement of the side slide 1062, causing the side slide 1062 to move relative to the auxiliary rod 102.

[0064] In the extension assembly 106, when the side slide 1062 moves in the side slide groove 1061, it drives the belt 1064 to rotate around the two rolling wheels 1063, thereby causing the rolling wheels 1063 to rotate, which in turn causes the side rack 1065 to rotate around the two rolling wheels 1063, driving the side gear 1068 to rotate, thereby driving the extension rod 1022 with the side tooth groove 1067 to move, causing the auxiliary rod 102 to extend and retract.

[0065] Furthermore, such as Figure 9 and Figure 10 As shown, a switch assembly 107 is provided between the extension rod 1022 and the mounting cylinder 1021. When the extension rod 1022 extends to the point where the end of the push plate 104 is flush with the end of the top rod 10, the output end of the switch assembly 107 extends to keep the extension rod 1022 in this state to facilitate its extension.

[0066] Specifically, the switch assembly 107 includes a hollow cylindrical locking cylinder 1071, which is vertically disposed on the side of the mounting cylinder 1021. The inner cavity of the locking cylinder 1071 is connected to the inner cavity of the mounting cylinder 1021. A drive slot 1072 is provided on the side wall of the locking cylinder 1071. A locking rod 1073 is disposed inside the locking cylinder 1071. A drive tooth groove 1074 is provided on the rod body of the locking rod 1073 facing the drive slot 1072. A drive frame 1075 is disposed outside the locking cylinder 1071. The drive frame 1075 is fixed on the mounting cylinder 1021. A drive gear 1076 is disposed on the drive frame 1075. The drive gear 1076 extends through the drive slot 1072 into the locking cylinder 1071 and meshes with the drive tooth groove 1074.

[0067] like Figure 9 and Figure 10As shown, a drive rack 108 is provided on the side wall of the side slide 1062. The drive rack 108 is connected to the drive gear 1076 through a transmission rod 109. Transmission gears 110 are provided at both ends of the transmission rod 109, and the transmission gears 110 on both sides mesh with the drive gear 1076 and the drive rack 108 respectively.

[0068] It should be noted that the extension rod 1022 is provided with a locking hole corresponding to the locking rod 1073.

[0069] In the aforementioned switch assembly 107, when the side slide 1062 moves in the side slide groove 1061, it drives the drive rack 108 to translate, thereby causing the drive gear 1076 to rotate, which in turn drives the locking rod 1073, which is provided with the drive tooth groove 1074, to translate and move in and out of the locking hole.

[0070] It is worth noting that in this embodiment, only one set of side slide groove 1061, side slide block 1062, rolling wheel 1063, belt 1064 and side rack 1065 can be provided on the surface in contact with the outlet of cavity 12. The side slide block 1062 moves under force and transmits the force to the side gears 1068 on each side through the above structure, so that all the side gears 1068 rotate together and extend or retract all the auxiliary rods 102 synchronously.

[0071] Similarly, all the switch components 107 are driven to operate by the same structure of side slide 1061, side slide 1062, roller 1063, belt 1064 and side rack 1065.

[0072] This embodiment provides a side support structure 1, in which an auxiliary rod 102 is retractably housed in the side of the push rod 10. When the push rod 10 extends into the cavity 6 to push the workpiece, the auxiliary rod 102 extends from the side of the push rod 10, with its top flush with the top of the push rod 10. The auxiliary rod 102 cooperates with the push rod 10 to push the workpiece at multiple points, achieving a better ejection effect.

[0073] It should be noted that, in order to solve the problem that the small area of ​​the ejector pin during the demolding process in the prior art would increase the force-bearing area of ​​the product, this embodiment adds an auxiliary rod 102 to increase the force-bearing area of ​​the product, and sets up a corresponding structure to drive the auxiliary rod 102 to move until it is flush with the ejector pin 10. The ejection area is increased without changing the area and number of the ejector pin 10 itself. In the actual production process, when the top surface of the ejector pin 10 is increased, the overall ejection area can still be increased by setting the auxiliary rod 102.

[0074] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A high-speed railway track pre-embedded sleeve injection mold, characterized in that: It includes a fixed template (2) and a movable template (3), the fixed template (2) and the movable template (3) are opposite to each other, a fixed mold (4) is installed on the fixed template (2), a movable mold (5) is installed on the movable template (3), the fixed mold (4) and the movable mold (5) are opposite to each other, and when the fixed mold (4) and the movable mold (5) are fitted together, there is a cavity (6) between them; The moving mold (5) and the moving template (3) are connected by a base (7). There is an ejection cavity (8) between the moving mold (5) and the moving template (3). A push plate (9) is provided in the ejection cavity (8). An ejector rod (10) is installed on the push plate (9). The ejector rod (10) passes through the moving mold (5) and extends into the cavity (6). A hydraulic cylinder (11) for pushing the push plate (9) to move is provided in the ejection cavity (8). A cavity (12) for the ejector rod (10) to pass through is provided in the moving mold (5). The top rod (10) is provided with a side support structure (1), which includes a side groove (101) provided on the side of the top rod (10). An auxiliary rod (102) is hinged to the bottom of the side groove (101) away from the end of the top rod (10). A support spring (103) is provided between the auxiliary rod (102) and the bottom of the side groove (101). The auxiliary rod (102) retracts into the side groove (101) under the lateral pressure of the inner wall of the cavity (12). A limit plate (13) is provided at the bottom of the side groove (101). After the top rod (10) extends out of the cavity (12), the top of the auxiliary rod (102) moves out of the side groove (101) under the thrust of the support spring (103). When the top rod (10) pushes the product, the auxiliary rod (102) assists in pushing the product. The top of the auxiliary rod (102) is provided with a push plate (104), the width of the push plate (104) is greater than the width of the auxiliary rod (102), and the top of the side groove (101) is provided with a top receiving groove (105) for receiving the push plate (104). There is an inclination angle between the push plate (104) and the auxiliary rod (102), and the auxiliary rod (102) is a telescopic structure. After the auxiliary rod (102) is extended by a predetermined distance, the push plate (104) is flush with the top of the top rod (10).

2. The injection mold for pre-embedded sleeves under high-speed railway tracks according to claim 1, characterized in that: The auxiliary rod (102) includes a mounting cylinder (1021) and an extension rod (1022) inserted into the mounting cylinder (1021). The mounting cylinder (1021) is a cylindrical structure with an open top, and the bottom of the mounting cylinder (1021) is hinged to the side groove (101). An extension assembly (106) is provided between the mounting cylinder (1021) and the extension rod (1022). Driven by the extension assembly (106), the upper part of the extension rod (1022) extends out of the mounting cylinder (1021) to extend the auxiliary rod (102).

3. The injection mold for pre-embedded sleeves under high-speed railway tracks according to claim 2, characterized in that: A switch assembly (107) is provided between the extension rod (1022) and the mounting cylinder (1021). When the extension rod (1022) extends to the end of the push plate (104) and the top rod (10), the output end of the switch assembly (107) extends to keep the extension rod (1022) in this state so as to assist in pushing it out.

4. The injection mold for pre-embedded sleeves under high-speed railway tracks according to claim 3, characterized in that: The extension assembly (106) includes a side groove (1061) disposed on the side of the mounting cylinder (1021), a side slide block (1062) slidably disposed in the side groove (1061), and the side slide block (1062) is provided with a serrated pad (1069). Rolling wheels (1063) are horizontally arranged at both ends of the side slide groove (1061). A belt (1064) is wound between the two rolling wheels (1063). The side slide (1062) is connected to the belt (1064). When the side slide (1062) moves, it can drive the belt (1064) to rotate around the two rolling wheels (1063), thereby causing the rolling wheels (1063) to rotate.

5. The injection mold for pre-embedded sleeves under high-speed railway tracks according to claim 4, characterized in that: The outer surface of the belt (1064) is provided with a side rack (1065), the cylinder body of the mounting cylinder (1021) is provided with a side drive groove (1066), the extension rod (1022) is provided with a side tooth groove (1067) on the rod body facing the side drive groove (1066), one of the rolling wheels (1063) is provided with a side gear (1068) on one side, the side gear (1068) meshes with the side rack (1065), the lower part of the side gear (1068) passes through the side drive groove (1066) and meshes with the side tooth groove (1067).

6. The injection mold for pre-embedded sleeves under high-speed railway tracks according to claim 5, characterized in that: The side slide (1062) is connected to the switch assembly (107); The switch assembly (107) includes a hollow cylindrical locking cylinder (1071), which is vertically disposed on the side of the mounting cylinder (1021). The inner cavity of the locking cylinder (1071) is connected to the inner cavity of the mounting cylinder (1021). A drive slot (1072) is provided on the side wall of the locking cylinder (1071). A locking rod (1073) is disposed inside the locking cylinder (1071), and the locking rod (1073) is directly opposite the drive. The rod of the slot (1072) is provided with a drive tooth groove (1074), and the locking cylinder (1071) is provided with a drive frame (1075) on the outside. The drive frame (1075) is fixed on the mounting cylinder (1021), and the drive frame (1075) is provided with a drive gear (1076). The drive gear (1076) extends through the drive slot (1072) into the locking cylinder (1071) and meshes with the drive tooth groove (1074).

7. The injection mold for pre-embedded sleeves under high-speed railway tracks according to claim 6, characterized in that: A drive rack (108) is provided on the side wall of the side slide (1062), and the drive rack (108) is connected to the drive gear (1076) through a transmission rod (109). The transmission rod (109) is provided with transmission gears (110) at both ends, and the two transmission gears (110) mesh with the drive gear (1076) and the drive rack (108) respectively.

8. The injection mold for pre-embedded sleeves under high-speed railway tracks according to claim 1, characterized in that: The top rod (10) is provided with side grooves (101) and top receiving grooves (105) on each side. The lengths of the auxiliary rods (102) provided on each side are different, so the positions of each top receiving groove (105) on the top rod (10) are different and do not affect each other; The tilt angles of each of the auxiliary rods (102) are different. The auxiliary rods (102) with larger lengths have larger tilt angles, so that when each of the auxiliary rods (102) is unfolded, they are all flush with the top of the top rod (10). Similarly, the angles between each of the push plates (104) and the corresponding auxiliary rods (102) are also different. The auxiliary rods (102) with larger lengths have smaller angles with the push plates (104).

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