Automatic material lifting mechanism of a mold

Abstract

The application discloses an automatic material lifting mechanism of a mold; the mechanism comprises a material lifting clamp rod arranged on a movable mold and a guide plate arranged on a fixed mold; the material lifting clamp rod is matched with the guide plate through a guide structure; the material lifting clamp rod is suitable for vertically lifting a workpiece on the fixed mold up and down through the guide structure when the movable mold is vertically opened; the material lifting clamp rod is suitable for clamping the workpiece on the fixed mold up and down and performing a vertical lifting action on the workpiece through the guide structure during the descending process of vertically closing the movable mold. The application has the beneficial effects that: through the cooperation of the material lifting clamp rod and the guide groove on the guide plate, the workpiece can be bypassed and clamped up and down during mold closing, and the workpiece can be lifted during mold opening, so that the material lifting is more stable and automatic; the material is automatically lifted during mold opening, and the material is automatically avoided and reset during mold closing, the intermediate waiting time is eliminated, the production efficiency is significantly improved, the expensive external equipment is saved, and the production cost is reduced.

Description

Technical Field

[0001] This application relates to the field of stamping dies, and in particular to an automatic material lifting mechanism for dies. Background Technology

[0002] The lifting mechanism of a stamping die is a crucial component of the stamping automation process. It is primarily used to smoothly and precisely lift the workpiece off the die surface after stamping, facilitating subsequent transfer by robotic arms or conveying equipment. Its accuracy and response speed directly impact the production line's operating efficiency, positioning precision, and the continuity of the automation process.

[0003] In traditional stamping production systems, material handling typically relies on pneumatic or simple mechanical ejection devices. In some complex cases, an independent electrical control system is even required for timing control. On the one hand, the arrangement of pneumatic and electrical circuits increases the complexity of the mold structure, resulting in higher debugging and maintenance costs, and also requiring a certain level of technical expertise from operators. On the other hand, external power or control units not only increase manufacturing costs but also face problems such as decreased reliability and response delays during continuous high-speed operation, seriously affecting the stability and economy of stamping production. Based on these issues, a new solution is urgently needed. Utility Model Content

[0004] The purpose of this application is to provide an automatic material lifting mechanism for molds that can solve at least one of the defects in the above-mentioned background art.

[0005] To achieve at least one of the above objectives, this application provides an automatic lifting mechanism for a mold, including a lifting clamping rod disposed on a moving mold and a guide plate disposed on a fixed mold; the lifting clamping rod and the guide plate cooperate through a guide structure; the lifting clamping rod is adapted to clamp the workpiece located on the fixed mold vertically and lift it vertically through the guide structure when the moving mold is vertically opening; the lifting clamping rod is adapted to move horizontally through the guide structure to bypass the workpiece and clamp it vertically again during the vertical closing and lowering process of the moving mold.

[0006] Preferably, the lifting clamp includes a telescopic component and a clamp, the clamp being horizontally and elastically slidably mounted on the moving mold via the telescopic component; the guiding structure includes a guide groove disposed on the guide plate and a sliding component mounted on the clamp, the sliding component slidingly engaging with the guide groove; the guide groove includes a first segment, a second segment, and a third segment connected end to end; the third segment is horizontally disposed, the first segment is vertically disposed and close to the workpiece, the first segment communicating with the third segment at its lower end; the clamp is adapted to, during mold opening, move vertically along the first segment via the sliding component to clamp the workpiece vertically; the clamp is adapted to, during mold closing, move along the second segment via the sliding component to the end of the third segment away from the first segment to avoid the next workpiece, and under the elastic force of the telescopic component, slide along the third segment via the sliding component to clamp the next workpiece again.

[0007] Preferably, the second segment includes an inclined segment and a vertical segment, the inclined segment being connected to the vertical segment, the inclined segment being connected to the first segment, and the vertical segment being connected to the third segment; or, the second segment is an inclined segment.

[0008] Preferably, the angle between the inclined segment and the horizontal direction is in the range of 30°-60°.

[0009] Preferably, the depth of the first segment is less than the depth of the second segment; the side of the clamp is provided with a slot, the sliding component includes a slider and a first elastic element, the slider is installed in the slot through the first elastic element, and the slider is adapted to extend or retract in the slot according to the guide groove of different depths.

[0010] Preferably, the depths at both ends of the third segment are the same as those of the first and second segments, respectively, and the depth of the third segment varies uniformly along the horizontal direction.

[0011] Preferably, the cross-sectional shape of the slider is circular.

[0012] Preferably, the telescopic assembly includes an outer rod, an inner rod, and a second elastic element; one end of the outer rod is open, and the other end of the outer rod is connected to the moving mold; the inner rod is limited and installed inside the outer rod by a limiting structure; one end of the inner rod is connected to the clamp, and the other end of the inner rod is connected to the bottom of the outer rod through the second elastic element; the inner rod is adapted to extend or retract at the open end of the outer rod under the action of the second elastic element and the guide structure.

[0013] Preferably, the limiting structure includes a first limiting ring and a second limiting ring, wherein the first limiting ring is disposed on the inner wall of the outer rod and the second limiting ring is disposed on the outer wall of the inner rod.

[0014] Preferably, the first limiting ring is disposed at the outlet end of the outer rod, and the second limiting ring is disposed at the bottom end of the inner rod.

[0015] Compared with the prior art, the beneficial effects of this application are as follows:

[0016] In the technical solution of this application, by using the lifting clamp rod in conjunction with the guide groove on the guide plate, the lifting clamp rod can bypass the workpiece and clamp the workpiece from top to bottom when the mold is closed, and lift the workpiece when the mold is opened, making the lifting more stable and automated; the lifting is automatic when the mold is opened and the workpiece is automatically avoided and reset when the mold is closed, eliminating intermediate waiting time, significantly improving production efficiency, saving expensive external equipment, and reducing production costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the second segment of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall structure of the second segment of this utility model, which is not segmented.

[0019] Figure 3 This is a cross-sectional schematic diagram of the present invention;

[0020] Figure 4 This is a schematic diagram of the slider of this utility model in the first segment;

[0021] Figure 5 This is a schematic diagram of the slider of this utility model in the second segment;

[0022] Figure 6 This is a cross-sectional schematic diagram of the material lifting clamp rod of this utility model.

[0023] In the figure: lifting clamp 1, telescopic assembly 110, outer rod 111, inner rod 112, second elastic element 113, first limiting ring 114, second limiting ring 115, clamp 120, slider 121, first elastic element 122, slot 123, guide plate 2, guide groove 210, first section 211, second section 212, third section 213. Detailed Implementation

[0024] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0025] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and 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. They should not be construed as limiting the specific protection scope of this application.

[0026] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0027] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0028] A preferred embodiment of this application, such as Figure 1 and Figure 2 As shown, an automatic material lifting mechanism for a mold includes a lifting clamping rod 1 disposed on a moving mold (not shown) and a guide plate 2 disposed on a fixed mold (not shown); the lifting clamping rod 1 and the guide plate 2 are engaged by a guiding structure; the lifting clamping rod 1 is adapted to clamp the workpiece located on the fixed mold vertically and lift it vertically by means of the guiding structure when the moving mold is vertically opening; the lifting clamping rod 1 is adapted to move horizontally by means of the guiding structure to bypass the workpiece and clamp it vertically again during the vertical closing process of the moving mold.

[0029] It should be understood that the lifting clamp 1 is set on the moving mold and moves up and down with the moving mold. At the same time, the lifting clamp 1 can clamp the workpiece and lift the workpiece when the mold is opened. When the mold is closed, if the lifting clamp 1 returns along the original path, it will interfere with the new workpiece. Therefore, the lifting clamp 1 moves a certain distance in the horizontal direction through the guide structure, bypasses the workpiece, and then clamps the new workpiece up and down.

[0030] Understandably, the working rhythm of traditional material lifting devices is independent of mold opening and closing, making precise coordination difficult. This not only reduces production efficiency but may also cause interference in mold movement due to timing errors, creating safety hazards. Furthermore, such devices often rely on additional power sources and complex control systems, increasing manufacturing costs and failure risks. In some scenarios, manual intervention is required, making full automation difficult. This application cleverly utilizes the mold opening and closing movements of the moving mold itself as a power source. Without any other external power or complex control, the vertical movement of the moving mold can be converted into a cyclical movement of vertical lifting and horizontal avoidance and reset. This synchronizes the material lifting rhythm with the production rhythm, improving production efficiency and eliminating the risk of human-machine interference.

[0031] As can be seen from the above, the guide structure should enable the lifting clamping rod 1 to convert the movement in the mold closing direction into a movement perpendicular to the mold closing direction during mold closing. A preferred embodiment of this application is as follows: Figure 1-3 As shown, the lifting clamp 1 includes a telescopic component 110 and a clamp 120. The clamp 120 is horizontally and elastically slidably mounted on the moving mold via the telescopic component 110. The guide structure includes a guide groove 210 disposed on the guide plate 2 and a sliding component mounted on the clamp 120. The sliding component slides into the guide groove 210. The guide groove 210 includes a first section 211, a second section 212, and a third section 213 connected end to end. The third section 213 is horizontally disposed, and the first section 211 is vertically disposed and close to the workpiece. The first section 211 is connected to the third section 213 through its lower end. The clamp 120 is adapted to move vertically along the first section 211 via the sliding component and clamp the workpiece vertically when the mold is opened. When the mold is closed, the clamp 120 is adapted to move along the second section 212 via the sliding component to the end of the third section 213 away from the first section 211 to avoid the next workpiece, and under the elastic force of the telescopic component 110, slide along the third section 213 via the sliding component to clamp the next workpiece again.

[0032] It should be understood that the guide groove 210 is slidably engaged with the sliding component, allowing the fixture 120 to slide along the guide groove 210. Since the guide groove 210 is divided into a first section 211, a second section 212, and a third section 213, according to their positional relationship, when the fixture 120 moves from the first section 211 to the second section 212 and along the second section 212, because the second section 212 is inclined, the fixture 120 will also move away from the workpiece as it moves downward with the moving mold. However, since the fixture 120 must be reliably connected to the moving mold, a telescopic component 110 is added between the fixture 120 and the moving mold. The telescopic component 110 can slide horizontally elastically to cooperate with the movement of the fixture 120.

[0033] Understandably, the first segment 211 is vertically positioned. When the mold opens, the clamp 120 lifts the clamped workpiece, removes it from its maximum height, and places a new workpiece at the workpiece's processing position. Then, the mold closes, and the clamp 120 moves downward along the second segment 212. Simultaneously, since the second segment 212 is inclined, the telescopic component 110 contracts and accumulates elastic potential energy as it moves downward, working with the clamp 120 to move away from the workpiece along the second segment 212. When the lowest point is reached, which is the end of the second segment 212, the telescopic component 110 releases its elastic potential energy, pushing the clamp 120 back to its initial position to clamp the next workpiece again.

[0034] It should also be noted that the positional structure of the first segment 211, the second segment 212, and the third segment 213 can take many forms. In this application, the first segment 211 is preferably set vertically and the third segment 213 is set horizontally. Under this setting, the force is simpler. However, if other parts of the mold may interfere, the positions of the first segment 211, the second segment 212, and the third segment 213 can be adjusted to a partially tilted state.

[0035] Specifically, such as Figure 1 and Figure 2 As shown, the second segment 212 includes an inclined segment and a vertical segment. The inclined segment is connected to the vertical segment. The inclined segment is connected to the first segment 211, and the vertical segment is connected to the third segment 213; or, the second segment 212 is an inclined segment.

[0036] It should be understood that when the workpiece is thin, the second segment 212 can be set as a single-segment inclined segment to bypass the workpiece; however, if the workpiece is thick, the single-segment inclined segment of the second segment 212 cannot meet the requirement of bypassing the workpiece. In this case, the second segment 212 can be changed to a two-segment setting with an inclined segment and a vertical segment. One segment is an inclined segment and the other is a vertical segment. The fixture 120 can reach the furthest horizontal distance from the workpiece in advance at a higher position, and then move down through the vertical segment. This solves the problem that when the workpiece is too thick, the single-segment inclined segment alone cannot bypass the workpiece.

[0037] There are multiple fixtures 120 used in conjunction with the workpiece. The fixtures 120 have different sizes and specifications. The appropriate fixture 120 is selected according to the different workpieces.

[0038] It should be noted that the clamp 120 can be removed from and replaced by the telescopic assembly 110. Different clamps 120 can be used to securely clamp workpieces from both above and below for workpieces of different thicknesses, shapes, and specifications. Using a suitable clamp 120 to clamp the workpiece can make the lifting process more stable and avoid potential safety hazards caused by vibration.

[0039] As can be seen from the above, a motion transition should be implemented between the first segment 211 and the second segment 212, so that after the clamp 120 rises to its highest point along the first segment 211, it will not return along the original path of the first segment 211 during the descent, but will descend along the second segment 212. A preferred embodiment of this application is as follows... Figure 1-5 As shown, the depth of the first segment 211 is less than the depth of the second segment 212; the side of the clamp 120 is provided with a slot 123, and the sliding assembly includes a slider 121 and a first elastic member 122. The slider 121 is installed in the slot 123 through the first elastic member 122. The slider 121 is adapted to extend or retract in the slot 123 according to the guide groove 210 of different depths.

[0040] It should be noted that the depth of the first segment 211 is less than the depth of the second segment 212. Therefore, a sudden change in depth occurs at the junction of the first segment 211 and the second segment 212. Furthermore, since the first elastic element 122 is always in a compressed state, the slider 121 reaches the junction of the first segment 211 and the second segment 212 under the pushing action of the first elastic element 122. The slider 121 will then enter the deeper second segment 212. When the mold closes and descends, the slider 121 will descend along the second segment 212 instead of returning along the original path of the first segment 211.

[0041] It is understandable that, since the depths at the junction of the first segment 211 and the second segment 212 are different, a certain structure is needed so that when the second segment 212 and the third segment 213 are reset to the first segment 211, the depth of the first segment 211 is returned. This can be achieved by using external force, such as the telescopic block pushing out the slider 121, or by making structural changes to the guide groove 210.

[0042] A preferred embodiment of this application, such as Figure 1 and Figure 2 As shown, the depths at both ends of the third segment 213 are the same as those of the first segment 211 and the second segment 212, respectively, and the depth of the third segment 213 varies uniformly along the horizontal direction.

[0043] It should be noted that the depths of the first segment 211 and the second segment 212 are constant. The two ends of the third segment 213 are connected to the first segment 211 and the second segment 212, so the depths of the two ends are the same as those of the first segment 211 and the second segment 212 respectively. However, the two ends of the third segment 213 have a depth difference. Therefore, the depth of the third segment 213 is uniformly varied in the horizontal direction to transition between the first segment 211 and the second segment 212.

[0044] Understandably, since the second segment 212 is deeper, returning to the depth of the first segment 211 requires overcoming the elastic force of the first elastic element 122; through the release of the elastic potential energy of the telescopic component 110, the slider 121 can overcome the elastic force of the first elastic element 122, so that the clamp 120 returns to the initial position of clamping the workpiece.

[0045] The tilt angle of the inclined section affects the smoothness of the movement of the slider 121 within it. A preferred embodiment of this application, such as... Figure 1 and Figure 2 As shown, the angle between the inclined segment and the horizontal direction ranges from 30° to 60°.

[0046] It should be understood that if the angle between the inclined section and the horizontal direction is too small, the friction of the slider 121 sliding in the inclined section will increase sharply, making its movement difficult and manifesting as obvious jamming and sluggishness, making it impossible to guarantee a smooth sliding process; it may even cause a self-locking phenomenon, where even if a large driving force is applied, the slider 121 cannot produce an effective displacement, resulting in the complete jamming of the entire mechanism, causing production accidents and economic losses; while when the angle between the inclined section and the horizontal direction is too large, the lifting clamp 1 will not have enough horizontal displacement distance to bypass the workpiece. Therefore, in this embodiment, the preferred angle between the inclined section and the horizontal direction is 30°-60°.

[0047] The cross-sectional shape of slider 121 affects the smoothness of its transition at the junction of guide groove 210 and its movement within guide groove 210. A preferred embodiment of this application is as follows... Figure 3-5 As shown, the cross-sectional shape of slider 121 is circular.

[0048] It should be understood that if the cross-sectional shape of the slider 121 is polygonal, and the first segment 211, the second segment 212, and the third segment 213 are connected end to end at a certain angle, then at the junction of the guide groove 210, there will be a change in the angle of the guide groove 210. If the cross-sectional shape of the slider 121 is polygonal, the cooperation between the slider 121 and the guide grooves 210 at different angles will be more complicated and prone to jamming. Therefore, in this embodiment, it is preferable to use a circular cross-sectional shape for the slider 121. With the widths of the first segment 211, the second segment 212, and the third segment 213 remaining the same, the circular cross-section slider 121 can maintain smooth sliding at any position.

[0049] The telescopic component 110 needs to cooperate with the guide structure to telescopically extend and retract and have an elastic restoring effect. A preferred embodiment of this application is as follows: Figure 1 , Figure 2 and Figure 6As shown, the telescopic assembly 110 includes an outer rod 111, an inner rod 112, and a second elastic member 113; one end of the outer rod 111 is open, and the other end of the outer rod 111 is connected to the moving mold; the inner rod 112 is limited and installed inside the outer rod 111 by a limiting structure; one end of the inner rod 112 is connected to the clamp 120, and the other end of the inner rod 112 is connected to the bottom of the outer rod 111 through the second elastic member 113; the inner rod 112 is adapted to extend or retract at the open end of the outer rod 111 under the action of the second elastic member 113 and the guide structure.

[0050] It should be understood that the outer rod 111 and the inner rod 112 are used to achieve the telescopic effect, and the second elastic element 113 is used to achieve the elastic reset effect. The inner rod 112 can telescopically extend and retract along the outer rod 111, and when the maximum distance is reached, the inner rod 112 is limited by the limiting structure to ensure that the inner rod 112 will not come off the outer rod 111. The clamp 120 is connected to the moving mold via the inner rod 112 and the outer rod 111, and moves up and down with the moving mold. When the mold is closed, as the clamp 120 moves downward along the second section 212 and moves away from the horizontal displacement of the workpiece, the inner rod 112 gradually retracts back to the outer rod 111. The bottom of the inner rod 112 is connected to the bottom of the outer rod 111 via the second elastic element 113. During this process, the second elastic element 113 accumulates elastic potential energy. When the clamp 120 reaches the end of the second section 212, due to the disappearance of the horizontal resistance of the guide groove 210, the second elastic element 113 releases its elastic potential energy, pushing the inner rod 112 to move outward, and further pushing the clamp 120 to clamp the next workpiece.

[0051] It is understandable that by using the sliding fit of the outer rod 111 and the inner rod 112, a stable and high-precision horizontal extension effect can be obtained. The pre-pressurized second elastic element 113 provides a continuous and reliable elastic reset effect, realizing an automatic reset effect. Furthermore, the entire lifting process can be repeated without external force.

[0052] The selection of the limiting structure should ensure that the structure is simple and effective. A preferred embodiment of this application is as follows: Figure 6 As shown, the limiting structure includes a first limiting ring 114 and a second limiting ring 115. The first limiting ring 114 is disposed on the inner wall of the outer rod 111, and the second limiting ring 115 is disposed on the outer wall of the inner rod 112.

[0053] It should be understood that the first limiting ring 114 and the second limiting ring 115 are integrally formed with the outer rod 111 and the inner rod 112. The first limiting ring 114 and the second limiting ring 115 have a sufficiently large overlapping area in their axial projection. When the inner rod 112 extends outward to its maximum stroke under the action of the second elastic element 113, the second limiting ring 115 will collide with the first limiting ring 114, thereby reliably limiting the maximum extension of the inner rod 112 and producing an effective limiting effect. This effectively prevents the inner rod 112 from accidentally coming out of the outer rod 111 under the elastic force of the second elastic element 113, ensuring the reliability and safety of the telescopic assembly 110's movement.

[0054] It is understandable that the second limiting ring 115 can be replaced by multiple limiting blocks evenly arranged along the outer wall of the inner rod 112 to achieve the same limiting effect. However, the limiting effect of the second limiting ring 115 is more reliable and can reduce the local stress concentration effect. In this application, the first limiting ring 114 and the second limiting ring 115 are preferably used in combination.

[0055] A preferred embodiment of this application, such as Figure 6 As shown, the first limiting ring 114 is located at the outlet end of the outer rod 111, and the second limiting ring 115 is located at the bottom end of the inner rod 112.

[0056] It should be noted that the first limiting ring 114 is located at the outlet end of the outer rod 111, while the second limiting ring 115 is located at the bottom end of the inner rod 112. This allows full use of the lengths of the outer rod 111 and the inner rod 112, maximizing the extension length of the inner rod 112.

[0057] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. An automatic material lifting mechanism for a mold, characterized in that: The device includes a lifting clamping rod disposed on the moving mold and a guide plate disposed on the fixed mold; the lifting clamping rod and the guide plate are engaged by a guide structure; the lifting clamping rod is adapted to clamp the workpiece located on the fixed mold vertically and lift the workpiece vertically by means of the guide structure when the moving mold is vertically opening; the lifting clamping rod is adapted to move horizontally by means of the guide structure to bypass the workpiece and clamp the workpiece vertically again during the vertical closing and lowering process of the moving mold.

2. The automatic material lifting mechanism for the mold as described in claim 1, characterized in that: The lifting clamp includes a telescopic component and a clamp. The clamp is horizontally and elastically slidably mounted on the moving mold via the telescopic component. The guiding structure includes a guide groove disposed on the guide plate and a sliding component mounted on the clamp. The sliding component slides into the guide groove. The guide groove includes a first section, a second section, and a third section connected end to end. The third section is horizontally disposed, and the first section is vertically disposed and close to the workpiece. The first section is connected to the third section via its lower end. The clamp is adapted to move vertically along the first section via the sliding component and clamp the workpiece vertically when the mold is opened. When the mold is closed, the clamp is adapted to move along the second section via the sliding component to the end of the third section away from the first section to avoid the next workpiece, and then slide along the third section via the sliding component under the elastic force of the telescopic component to clamp the next workpiece again.

3. The automatic material lifting mechanism for the mold as described in claim 2, characterized in that: The second segment includes an inclined segment and a vertical segment, the inclined segment being connected to the vertical segment, the inclined segment being connected to the first segment, and the vertical segment being connected to the third segment; or, the second segment is an inclined segment.

4. The automatic material lifting mechanism for the mold as described in claim 3, characterized in that: The angle between the inclined segment and the horizontal direction ranges from 30° to 60°.

5. The automatic material lifting mechanism for the mold as described in claim 2, characterized in that: The depth of the first segment is less than the depth of the second segment; the side of the clamp is provided with a slot, the sliding component includes a slider and a first elastic element, the slider is installed in the slot through the first elastic element, and the slider is adapted to extend or retract in the slot according to the guide groove of different depths.

6. The automatic material lifting mechanism for the mold as described in claim 5, characterized in that: The depths at both ends of the third segment are the same as those of the first and second segments, respectively, and the depth of the third segment varies uniformly along the horizontal direction.

7. The automatic material lifting mechanism for the mold as described in claim 5, characterized in that: The slider has a circular cross-sectional shape.

8. The automatic material lifting mechanism for the mold as described in claim 2, characterized in that: The telescopic assembly includes an outer rod, an inner rod, and a second elastic element; one end of the outer rod is open, and the other end of the outer rod is connected to a moving mold; the inner rod is limited and installed inside the outer rod by a limiting structure; one end of the inner rod is connected to the clamp, and the other end of the inner rod is connected to the bottom of the outer rod through the second elastic element; the inner rod is adapted to extend or retract at the open end of the outer rod under the action of the second elastic element and the guide structure.

9. The automatic material lifting mechanism for the mold as described in claim 8, characterized in that: The limiting structure includes a first limiting ring and a second limiting ring, wherein the first limiting ring is disposed on the inner wall of the outer rod and the second limiting ring is disposed on the outer wall of the inner rod.

10. The automatic material lifting mechanism for the mold as described in claim 9, characterized in that: The first limiting ring is disposed at the outlet end of the outer rod, and the second limiting ring is disposed at the bottom end of the inner rod.

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