Mold overturning mechanism

Abstract

The invention provides a mold overturning mechanism, and belongs to the technical field of mold pressing, the mold overturning mechanism comprises a base, a moving assembly and a mold assembly, the base is provided with a sliding groove and a side arm, the side arm is provided with a guide groove, the moving assembly comprises an overturning upper cover and a moving bottom cover, and one end of the overturning upper cover is rotatably connected with one end of the moving bottom cover; the two sides of the movable bottom cover are contained in the two sliding grooves correspondingly, the mold assembly comprises an upper mold plate, a lower mold plate and a mold pressing driving element, and the overturning upper cover is overturned relative to the movable bottom cover through movement of the movable bottom cover, so that the upper mold and the lower mold on the overturning upper cover and the movable bottom cover are separated; at the moment, a release agent can be sprayed between the upper mold and the lower mold to help the product to be smoothly separated from the mold, so that the demolding process is simplified, the production efficiency is greatly improved, the mold damage is reduced by using the release agent, and the service life of the mold is prolonged.

Description

Technical Field

[0001] The present invention belongs to the technical field of molding, and relates to a mold turning mechanism. Background Art

[0002] In the molding process, the commonly used mold is composed of an upper part and a lower part. The upper surface of the lower mold and the lower surface of the upper mold form the molding surface. These two molding surfaces are closely attached during the mold closing process. When molding a product, a molding material is placed in the mold, and the lower surface molding surface of the upper mold is accurately docked with the upper surface molding surface of the lower mold. Finally, the aligned mold as a whole is sent into a hot press for the molding process. After the molding is completed, the upper and lower molds need to be separated. Since the molds are generally heavy, it brings great difficulties and operation risks to the mold opening and turning operations.

[0003] In summary, currently, during the mold opening process, a relatively simple mechanical structure is usually adopted to achieve the operation. For example, the mold opening is completed by the ejection action of an oil cylinder, and the lever principle of force is used to achieve the turning of the mold. However, its application range is very limited. Especially the method of achieving turning through the lever of force is only applicable to molds with small volume and light weight. For large-sized or heavy molds, this method is not only difficult to effectively complete the turning, but may also cause unstable operation of the equipment and even lead to operation accidents, and there is still much room for improvement. Summary of the Invention

[0004] The object of the present invention is to address the above problems existing in the prior art and propose a mold turning mechanism, including:

[0005] A base provided with sliding grooves and side arms. The number of the side arms and the sliding grooves is two. The two sliding grooves are arranged in parallel on both sides of the base. The two side arms are respectively arranged on both sides of the base and are perpendicular to the sliding grooves. Each side arm is provided with a guiding groove, and the guiding groove is provided with an opening;

[0006] A moving component including a turning upper cover and a moving bottom cover. One end of the turning upper cover is rotatably connected to one end of the moving bottom cover. The two sides of the moving bottom cover are respectively received in the two sliding grooves and are slidably connected to the base. The other end of the turning upper cover can be partially received in the two guiding grooves;

[0007] A mold component including an upper template, a lower template, and a molding driving element. The upper template is detachably connected to the turning upper cover. The lower template is detachably connected to the moving bottom cover. The molding driving element is connected to the base, and the output shaft of the molding driving element can contact the turning upper cover;

[0008] When the movable bottom cover moves along the sliding groove, the flipping upper cover can follow the path of the guiding groove to achieve rotation relative to the movable bottom cover.

[0009] In the above-mentioned mold flipping mechanism, it further includes a rotating column and a lifting block. The rotating column is arranged on the side of the movable bottom cover away from the side arm. The flipping upper cover is provided with a rotating part, and the rotating part is rotatably connected to the lifting block. The lifting block is sleeved on the rotating column and is rotatably and liftably connected to the rotating column.

[0010] In the above-mentioned mold flipping mechanism, the flipping upper cover is further provided with a first pulley, and the first pulley is received in the guiding groove.

[0011] In the above-mentioned mold flipping mechanism, it further includes a cushion block and a first elastic member. The cushion blocks are arranged on both sides of the movable bottom cover. One end of the first elastic member is connected to the cushion block, and the other end of the first elastic member can contact the flipping upper cover.

[0012] In the above-mentioned mold flipping mechanism, it further includes a locking assembly. The locking assembly includes a locking driving element and a locking rod. The locking driving element is connected to the side arm, and the driving element can drive the locking rod to extend and retract relative to the side arm.

[0013] In the above-mentioned mold flipping mechanism, it further includes a lifting block assembly. The lifting block assembly includes an upper lifting block and a lower lifting block. The lower lifting block is connected to the base. The upper lifting block is liftably connected to the lower lifting block, and the upper lifting block contacts the movable bottom cover.

[0014] In the above-mentioned mold flipping mechanism, the lifting block assembly further includes a second pulley. The second pulley is rotatably received in the upper lifting block, and a part of the second pulley protrudes from the upper lifting block. The protruding part of the second pulley can contact the movable bottom cover.

[0015] In the above-mentioned mold flipping mechanism, the lifting block assembly further includes a second elastic member. The lower lifting block is provided with an elastic receiving groove. The second elastic member is received in the elastic receiving groove and protrudes from the elastic receiving groove. One end of the second elastic member contacts the bottom of the elastic receiving groove, and the other end of the second elastic member contacts the upper lifting block.

[0016] In the above-mentioned mold turning mechanism, the lifting block assembly further includes a limit pin. The upper lifting block is provided with a connection hole. One end of the limit pin is connected to the lower lifting block, and the other end of the limit pin is received in the connection hole. The connection hole is provided with a first contact surface, and the limit pin is provided with a second contact surface. When the other end of the limit pin moves in the connection hole, the second contact surface can contact the first contact surface.

[0017] In the above-mentioned mold turning mechanism, it further includes a moving driving element. The moving driving element is arranged at one end of the base, and the output shaft of the moving driving element is connected to the moving bottom cover. The moving driving element can drive the moving bottom cover to move back and forth along the sliding groove.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. By moving the moving bottom cover, the flipping upper cover flips relative to the moving bottom cover, so that the upper mold and the lower mold on the flipping upper cover and the moving bottom cover are separated. At this time, a demolding agent can be sprayed between the upper mold and the lower mold to help the product smoothly separate from the mold, which not only simplifies the demolding process, greatly improves the production efficiency, but also reduces the damage to the mold by using the demolding agent and prolongs its service life.

[0020] 2. During the molding operation, since the flipping upper cover realizes flexible adjustment of its height through connection with the lifting block, it can ensure that the molten material can uniformly and fully fill the mold cavity, and the rotational connection between the rotating part and the lifting block can also realize the easy separation of the upper mold and the lower mold, facilitating the use of the demolding agent.

[0021] 3. The molding driving element presses the flipping upper cover to sink until the product molding is completed. Then, the pressure of the molding driving element on the flipping upper cover is cancelled. At this time, the flipping upper cover slightly lifts under the action of the first elastic member, so that the lower mold and the upper mold are slightly separated, which provides convenience for the subsequent rotation of the flipping upper cover. At the same time, the height of the first elastic member can be adjusted through the cushion block, and then the height of the flipping upper cover by the first elastic member can be adjusted, so that the height of the first pulley can slide into the guide groove through the opening when the flipping upper cover moves with the moving bottom cover.

[0022] 4. When the moving bottom cover undergoes unexpected sliding, causing the flipping upper cover to lose support and fall, driving the locking rod to extend through the locking driving element can effectively prevent the flipping upper cover from continuing to fall, thus avoiding potential damage or safety accidents.

[0023] 5. When the second elastic member pushes the upper lifting block upward until the first contact surface contacts the second contact surface, the movable bottom cover is at the optimal position at this time. Due to the limitation of the limit pin, the two sides of the movable bottom cover will not contact the top of the guide groove. Due to the action of the second elastic member, the two sides of the movable bottom cover will not contact the bottom of the guide groove. The limit pin can not only reduce the friction between the movable bottom cover and the guide groove, but also provide a stable guiding effect for the upper lifting block to prevent unstable shaking or deviation during the lifting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the present invention.

[0025] Figure 2 is Figure 1 an enlarged view of detail A in

[0026] Figure 3 is a schematic structural diagram of another perspective of the present invention.

[0027] Figure 4 is Figure 3 an enlarged view of detail B in

[0028] Figure 5 is a schematic diagram of the lifting block assembly in the present invention.

[0029] Figure 6 is a partial cross-sectional view of the lifting block assembly in the present invention.

[0030] In the figure:

[0031] 1. Base; 11. Sliding groove; 12. Side arm; 121. Guide groove; 1211. Opening; 2. Moving mechanism; 21. Flipping upper cover; 211. Rotating part; 212. First pulley; 22. Movable bottom cover; 3. Rotating column; 4. Lifting block; 5. Spacer block; 6. First elastic member; 7. Locking assembly; 71. Locking driving element; 72. Locking rod; 8. Lifting block assembly; 81. Upper lifting block; 811. Connecting hole; 8111. First contact surface; 82. Lower lifting block; 83. Second pulley; 84. Second elastic member; 85. Limit pin; 851. Second contact surface; 9. Moving driving element. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The following are specific embodiments of the present invention in combination with the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0033] It should be noted that all the directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the attached drawings). If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, in the present invention, descriptions such as "first", "second", "one", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0035] In the present invention, unless otherwise clearly specified and defined, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, the technical solutions between various embodiments of the present invention can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0037] The specific embodiments described herein are only examples of the present invention patent. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the patent of the present invention or exceed the scope defined by the appended claims.

[0038] As Figures 1 - 6 shown, a mold turning mechanism includes: a base 1, a moving component, and a mold component.

[0039] Among them, the base 1 is provided with a sliding groove 11 and side arms 12. The number of the side arms 12 and the sliding grooves 11 is two. The two sliding grooves 11 are arranged in parallel on both sides of the base 1. The two side arms 12 are respectively arranged on both sides of the base 1 and are perpendicular to the sliding grooves 11. Each side arm 12 is provided with a guiding groove 121, and the guiding groove 121 is provided with an opening 1211.

[0040] Among them, the moving component includes a flipping upper cover 21 and a moving bottom cover 22. One end of the flipping upper cover 21 is rotatably connected to one end of the moving bottom cover 22. Both sides of the moving bottom cover 22 are respectively received in the two sliding grooves 11 and are slidably connected to the base 1. The other end of the flipping upper cover 21 can be partially received in the two guiding grooves 121.

[0041] Among them, the mold component (not shown in the figure) includes an upper template, a lower template and a molding driving element. The upper template is detachably connected to the flipping upper cover 21, the lower template is detachably connected to the moving bottom cover 22, the molding driving element is connected to the base 1, and the output shaft of the molding driving element can contact the flipping upper cover 21.

[0042] When the moving bottom cover 22 moves along the sliding groove 11, the flipping upper cover 21 can rotate relative to the moving bottom cover 22 through the path of the guiding groove 121.

[0043] Specifically, after the upper template and the lower template are respectively installed on the flipping upper cover 21 and the moving bottom cover 22, the flipping upper cover 21 is pressed down by the molding driving element to mold the product between the upper template and the lower template. After the molding is completed, the moving bottom cover 22 moves along the sliding groove 11 while driving the flipping upper cover 21 to move. During the moving process, a part of the flipping upper cover 21 enters the guiding groove 121 from the opening 1211, and the other end of the flipping upper cover 21 is lifted along the guiding groove 121 to flip relative to the moving bottom cover 22.

[0044] In this embodiment, the movement of the moving bottom cover 22 causes the flipping upper cover 21 to flip relative to the moving bottom cover 22, so that the upper mold and the lower mold on the flipping upper cover 21 and the moving bottom cover 22 are separated. At this time, a demolding agent can be sprayed between the upper mold and the lower mold to help the product smoothly separate from the mold, which not only simplifies the demolding process, greatly improves the production efficiency, but also uses the demolding agent to reduce the damage of the mold and extend its service life.

[0045] As Figures 1 - 6 shown, on the basis of the above embodiment, it further includes a rotating column 3 and a lifting block 4. The rotating column 3 is arranged on the side of the moving bottom cover 22 away from the side arm 12. The flipping upper cover 21 is provided with a rotating part 211. The rotating part 211 is rotatably connected to the lifting block 4. The lifting block 4 is sleeved on the rotating column 3 and is rotatably and liftably connected to the rotating column 3.

[0046] Specifically, the lifting block 4 is sleeved on the rotating column 3 and can be lifted and rotated relative to the rotating column 3. During the process of molding the product, the flipping upper cover 21 can be lifted through the lifting block 4. After the molding is completed, the flipping can be realized through the connection between the rotating part 211 and the lifting block 4.

[0047] In this embodiment, during the molding operation, since the flipping upper cover 21 realizes the flexible adjustment of its height through the connection with the lifting block 4, it can ensure that the molten material can be evenly and fully filled into the mold cavity. And the rotational connection between the rotating part 211 and the lifting block 4 can also realize the easy separation of the upper mold and the lower mold, facilitating the use of the mold release agent.

[0048] As Figures 1 - 6 shown, on the basis of the above embodiment, the flipping upper cover 21 is further provided with a first pulley 212, and the first pulley 212 is received in the guiding groove 121.

[0049] In this embodiment, the flipping upper cover 21 realizes the flipping relative to the moving bottom cover 22 by moving one end along the direction of the guiding groove 121 through the first pulley 212. The first pulley 212 reduces the friction between the flipping upper cover 21 and the guiding groove 121, enabling the flipping upper cover 21 to rotate more smoothly along with the guiding groove 121.

[0050] As Figures 1 - 6 shown, on the basis of the above embodiment, it further includes a spacer block 5 and a first elastic member 6. The spacer block 5 is arranged on both sides of the moving bottom cover 22. One end of the first elastic member 6 is connected to the spacer block 5, and the other end of the first elastic member 6 can be in contact with the flipping upper cover 21.

[0051] In this embodiment, the molding driving element presses the flipping upper cover 21 to sink it until the product molding is completed. Then, the pressure on the flipping upper cover 21 by the molding driving element is cancelled. At this time, the flipping upper cover 21 is slightly lifted under the action of the first elastic member 6, so that the lower mold and the upper mold are slightly separated, which provides convenience for the subsequent rotation of the flipping upper cover 21. At the same time, the height of the first elastic member 6 can be adjusted through the spacer block 5, and further the height of the flipping upper cover 21 affected by the first elastic member 6 can be adjusted, so that the height of the first pulley 212 can slide into the guiding groove 121 through the opening 1211 when the flipping upper cover 21 follows the moving bottom cover 22.

[0052] As Figures 1 - 6 shown, on the basis of the above embodiment, it further includes a locking assembly 7. The locking assembly 7 includes a locking driving element 71 and a locking rod 72. The locking driving element 71 is connected to the side arm 12, and the driving element can drive the locking rod 72 to extend and retract relative to the side arm 12.

[0053] Specifically, when the movable bottom cover 22 moves and pushes the flip-up upper cover 21 to be fully unfolded, the locking drive element 71 on the side wall can drive the locking rod 72 to extend. At this time, if an unexpected situation causes the movable bottom cover 22 to slide and the flip-up upper cover 21 to fall, the falling flip-up upper cover 21 will contact the locking rod 72, preventing the flip-up upper cover 21 from continuing to fall.

[0054] In this embodiment, when the movable bottom cover 22 undergoes an unexpected slide and causes the flip-up upper cover 21 to lose support and fall, driving the locking rod 72 to extend through the locking drive element 71 can effectively prevent the flip-up upper cover 21 from continuing to fall, thereby avoiding potential damage or safety accidents.

[0055] As Figures 1 - 6 shown, on the basis of the above embodiment, it further includes a lifting block assembly 8. The lifting block assembly 8 includes an upper lifting block 81 and a lower lifting block 82. The lower lifting block 82 is connected to the base 1. The upper lifting block 81 is connected to the lower lifting block 82 in a liftable manner. The upper lifting block 81 contacts the movable bottom cover 22.

[0056] Specifically, after the molding is completed, the pressure of the molding drive element on the flip-up upper cover 21 is cancelled. The upper lifting block 81 moves away from the lower lifting block 82 and moves upward. The upper lifting block 81 lifts the movable bottom cover 22 to lift it a certain distance from the bottom of the sliding groove 11, reducing the friction between the movable bottom cover 22 and the sliding groove 11.

[0057] In this embodiment, the design of the lifting block assembly 8 reduces the resistance encountered by the movable bottom cover 22 during the sliding process without affecting the molding, reduces the wear caused by friction, and enables the movable bottom cover 22 to move more smoothly along the sliding groove 11.

[0058] As Figures 1 - 6 shown, on the basis of the above embodiment, the lifting block assembly 8 further includes a second pulley 83. The second pulley 83 is rotatably received in the upper lifting block 81, and a part of the second pulley 83 protrudes from the upper lifting block 81. The protruding part of the second pulley 83 can contact the movable bottom cover 22.

[0059] In this embodiment, the second pulley 83 is rotatably received in the upper lifting block 81 and only the protruding part contacts the movable bottom cover 22, making the upper lifting block 81 as close as possible to the movable bottom cover 22. When the molding drive element presses down the movable bottom cover 22, both sides of the movable bottom cover 22 will contact the bottom of the sliding groove 11. Since the protruding part of the second pulley 83 is less, it will not cause extrusion damage to the second pulley 83.

[0060] As Figures 1 - 6As shown, on the basis of the above-described embodiment, the lifting block assembly 8 further includes a second elastic member 84. The lower lifting block 82 is provided with an elastic receiving groove (not marked in the figure). The second elastic member 84 is received in the elastic receiving groove and protrudes from the elastic receiving groove. One end of the second elastic member 84 contacts the bottom of the elastic receiving groove, and the other end of the second elastic member 84 contacts the upper lifting block 81.

[0061] Specifically, the second elastic member 84 is received in the lower lifting block 82. The second elastic member 84 serves as a component for driving the upper lifting block 81 to lift. After the pressure of the molding drive element on the flip top cover 21 disappears, the second elastic member 84 can drive the upper lifting block 81 to rise a short distance. At this time, the moving bottom cover 22 rises under the action of the upper lifting block 81.

[0062] In this embodiment, the second elastic member 84 is used to drive the lifting of the upper lifting block 81. This design not only does not affect the molding process of the product, but also separates the two sides of the moving bottom cover 22 from the bottom of the guide groove 121 after molding, reducing the friction between the moving bottom cover 22 and the guide groove 121.

[0063] As Figures 1 - 6 shown, on the basis of the above-described embodiment, the lifting block assembly 8 further includes a limit pin 85. The upper lifting block 81 is provided with a connection hole 811. One end of the limit pin 85 is connected to the lower lifting block 82, and the other end of the limit pin 85 is received in the connection hole 811. The connection hole 811 is provided with a first contact surface 8111, and the limit pin 85 is provided with a second contact surface 851. When the other end of the limit pin 85 moves in the connection hole 811, the second contact surface 851 can contact the first contact surface 8111.

[0064] In this embodiment, when the second elastic member 84 pushes the upper lifting block 81 to rise until the first contact surface 8111 contacts the second contact surface 851, the moving bottom cover 22 is in the optimal position at this time. Due to the limitation of the limit pin 85, the two sides of the moving bottom cover 22 will not contact the top of the guide groove 121. Due to the action of the second elastic member 84, the two sides of the moving bottom cover 22 will not contact the bottom of the guide groove 121. The limit pin 85 can not only reduce the friction between the moving bottom cover 22 and the guide groove 121, but also provide a stable guiding effect for the upper lifting block 81, preventing unstable shaking or deviation during the lifting process.

[0065] As Figures 1 - 6As shown, on the basis of the above embodiments, it further includes a moving driving element 9. The moving driving element 9 is disposed at one end of the base 1, and the output shaft of the moving driving element 9 is connected to the moving bottom cover 22. The moving driving element 9 can drive the moving bottom cover 22 to move back and forth along the sliding groove 11.

[0066] In this embodiment, the moving driving element 9 can provide stable power to the moving bottom cover 22, achieve precise control of the moving bottom cover 22, and also improve the production efficiency as a whole.

Claims

1. A mold turning mechanism, characterized in that: include: A base, which is provided with a sliding groove and a side arm, the number of the side arm and the sliding groove is two, the two sliding grooves are arranged in parallel on both sides of the base, the two side arms are respectively arranged on both sides of the base and are arranged perpendicular to the sliding groove, each of the side arms is provided with a guide groove, and the guide groove is provided with an opening; A moving assembly, comprising a flip upper cover and a moving bottom cover, wherein one end of the flip upper cover is rotatably connected to one end of the moving bottom cover, two sides of the moving bottom cover are respectively accommodated in the two sliding grooves and are slidably connected to the base, and the other end of the flip upper cover can be partially accommodated in the two guide grooves; A mold assembly, comprising an upper mold plate, a lower mold plate and a mold-pressing driving element, wherein the upper mold plate is detachably connected to the flip upper cover, the lower mold plate is detachably connected to the movable bottom cover, the mold-pressing driving element is connected to the base, and an output shaft of the mold-pressing driving element can contact the flip upper cover; When the movable bottom cover moves along the sliding groove, the flip upper cover can be rotated relative to the movable bottom cover through the path of the guide groove.

2. A mold turning mechanism according to claim 1, characterized in that: It also includes a rotating column and a lifting block, wherein the rotating column is arranged on a side of the movable bottom cover away from the side arm, the flip upper cover is provided with a rotating part, the rotating part is rotatably connected to the lifting block, the lifting block is sleeved on the rotating column, and is rotatably and liftably connected to the rotating column.

3. A mold turning mechanism according to claim 2, characterized in that: The flip upper cover is also provided with a first pulley, and the first pulley is accommodated in the guide groove.

4. A mold turning mechanism according to claim 3, characterized in that: It also includes a cushion block and a first elastic member. The cushion blocks are arranged on both sides of the movable bottom cover. One end of the first elastic member is connected to the cushion block, and the other end of the first elastic member can contact the flip upper cover.

5. A mold turning mechanism according to claim 1, characterized in that: It also includes a locking assembly, which includes a locking drive element and a locking rod. The locking drive element is connected to the side arm, and the drive element can drive the locking rod to extend and retract relative to the side arm.

6. A mold turning mechanism according to claim 1, characterized in that: It also includes a lifting block assembly, which includes an upper lifting block and a lower lifting block. The lower lifting block is connected to the base, the upper lifting block is connected to the lower lifting block in a liftable manner, and the upper lifting block is in contact with the movable bottom cover.

7. A mold turning mechanism according to claim 6, characterized in that: The lifting block assembly further comprises a second pulley, which is rotatably accommodated in the upper lifting block, and the second pulley partially protrudes from the upper lifting block, and the protruding portion of the second pulley can contact the movable bottom cover.

8. A mold turning mechanism according to claim 7, characterized in that: The lifting block assembly also includes a second elastic member, the lower lifting block is provided with an elastic accommodating groove, the second elastic member is accommodated in the elastic accommodating groove and protrudes from the elastic accommodating groove, one end of the second elastic member contacts the bottom of the elastic accommodating groove, and the other end of the second elastic member contacts the upper lifting block.

9. A mold turning mechanism according to claim 8, characterized in that: The lifting block assembly also includes a limit pin, the upper lifting block is provided with a connecting hole, one end of the limit pin is connected to the lower lifting block, the other end of the limit pin is accommodated in the connecting hole, the connecting hole is provided with a first contact surface, and the limit pin is provided with a second contact surface. When the other end of the limit pin moves in the connecting hole, the second contact surface can contact the first contact surface.

10. A mold turning mechanism according to claim 1, characterized in that: It also includes a moving driving element, which is arranged at one end of the base, and the output shaft of the moving driving element is connected to the moving bottom cover, and the moving driving element can drive the moving bottom cover to move back and forth along the sliding groove.

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