Slide mechanism for a mold

Abstract

The application provides a slider mechanism of a mold, and belongs to the technical field of molds. The slider mechanism of the mold solves the problems of low operation precision and short service life of the slider mechanism of the mold in the prior art. In the slider mechanism of the mold, the mold comprises a movable mold and a fixed mold located above the movable mold, the slider mechanism comprises a slider with an inclined guide groove, which is slidably arranged on the movable mold, a poking block is arranged on the fixed mold and inserted into the inclined guide groove, the slider has a guide portion located on the side of the slider, a wear-resistant sheet is fixedly connected to the bottom surface of the slider, the movable mold has a supporting plane for supporting the wear-resistant sheet, and the movable mold is further provided with a guide structure in sliding cooperation with the guide portion. The application can keep the guide structure at a high guide precision, thereby ensuring the operation precision of the slider, prolonging the service life of the slider, and greatly improving the operation stability of the mold.

Description

Technical Field

[0001] The invention belongs to the technical field of molds and relates to a slider mechanism of a mold. Background Art

[0002] A slider mechanism, also known as a lateral parting and core pulling mechanism, is a method for dealing with undercuts in plastic parts that prevent smooth demolding. When a plastic part has side indentations, such as round or square holes, bosses, grooves, or ribs, that prevent smooth demolding in the mold's opening direction, a lateral slider mechanism is necessary. Its basic principle is to convert the vertical movement of the mold opening and closing into the horizontal movement of the slider, allowing for smooth product removal.

[0003] The slider mechanism generally uses the mold opening and closing forces of the injection molding machine to perform lateral parting, core pulling, and resetting to complete the action. In special cases, hydraulic cylinders, hydraulic motors, etc. are also used to complete the action. For example, the patent document discloses a mold for producing electric iron handle covers (application number: 201920913539.4), which includes a panel, a nozzle plate, a front template, a rear template, an ejector fixing plate, an ejector bottom plate, and a base arranged in sequence. The front template is embedded with a front mold core, and the rear template is embedded with a rear mold core. Two product cavities are formed between the front mold core and the rear mold core. A sliding member is provided inside each product cavity, and a slide groove is provided on the sliding member. When the mold is opened, the two sliding members move toward the inside of the positioning block body at the same time, so that the sliding member is disengaged from the corresponding product cavity. At this time, the product in the product cavity can be taken out. During the manufacturing process of this mold, the following deficiencies exist: the inclined surface of the sliding part with the slide groove serves as the clamping force surface of the sliding part. After the mold is closed, the positioning block will press against this clamping force surface. The presence of the slide groove on the clamping force surface affects the strength, causing the clamping force surface to be easily deformed under pressure, which affects the service life of the sliding part. In addition, in order to guide the movement of the sliding part, a guide structure is provided between the sliding part and the rear mold plate. After the mold is closed, the guide structure between the sliding part and the rear mold plate needs to withstand the clamping pressure applied to the sliding part by the positioning block on the front mold core. Over time, this will cause the guide structure to wear and reduce the guiding accuracy, thereby affecting the operating accuracy and service life of the sliding mechanism and the operational stability of the mold. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a slider mechanism for a mold. The technical problem solved by the present invention is: how to improve the operating accuracy and service life of the slider mechanism.

[0005] The objectives of the present invention can be achieved through the following technical solutions: a slider mechanism of a mold, the mold includes a movable mold and a fixed mold located above the movable mold, the slider mechanism includes a slider with an inclined guide groove slidably set on the movable mold, the fixed mold is provided with a shift block inserted into the inclined guide groove, and is characterized in that the slider has a guide portion located on its side, and a wear-resistant plate is fixedly connected to the bottom surface of the slider, the movable mold has a supporting plane for supporting the wear-resistant plate, and the movable mold is also provided with a guide structure that forms a sliding fit with the guide portion.

[0006] When the mold is opened, the movable mold moves downward, and the shift block installed on the fixed mold is used to drive the slider to slide outward, so as to realize the core pulling of the inverted part of the product. In this slider mechanism, a guide portion is provided on the side of the slider, forming a design of a side-arranged guide structure. The guide structure cooperates with the guide portion to fix the slider laterally on the movable mold, so that the slider can slide along the guide rail on the movable mold. At the same time, a wear-resistant plate is fixed on the bottom surface of the slider, and a support plane for supporting the wear-resistant plate is provided on the movable mold. This structure makes it possible that after the mold is closed, the mold closing pressure applied to the slider by the fixed mold is borne by the wear-resistant plate on the lower side of the slider, rather than by the guide structure. Since the material of the wear-resistant plate itself has sufficient hardness and high wear resistance, it is sufficient to withstand the friction of movement. Therefore, the bottom of the slider is supported by the wear-resistant plate, so that the position accuracy and balance of the slider are guaranteed, thereby enabling the slider to always have a high matching accuracy with the guide structure on its side. At the same time, since the wear-resistant sheet bears the mold closing pressure, it can also effectively protect the guide structure and prevent the guide structure from being worn due to excessive force. Therefore, the guide structure can always maintain a high guiding accuracy, so that the operating accuracy of the slider can be guaranteed, the service life can be extended, and the operation stability of the mold is greatly improved.

[0007] In the aforementioned mold slider mechanism, the slider comprises a base and an inclined wedge. The inclined wedge has a greater hardness than the base. The movable mold is provided with a lower mold core. The side of the base proximal to the lower mold core has a molding protrusion, and the inclined wedge is connected to the side of the base facing away from the lower mold core. The slider utilizes a separate, inlaid design of the base and the inclined wedge, facilitating subsequent care and maintenance. The independently manufactured inclined wedge facilitates the machining of the inclined guide groove while ensuring machining accuracy. Furthermore, the separate design allows the base and the inclined wedge to be manufactured from different materials. This advantage is that, on the one hand, the base's material hardness is relatively low, making it easier to machine the more complex molding protrusions used for product molding. On the other hand, after mold closing, the fixed mold will rest against the inclined wedge block, and the inclined wedge block will directly bear the mold closing pressure. The inclined wedge block is made of wear-resistant and high-hardness material. Normally, the hardness of the inclined wedge block is in the range of HRC48-52, which can ensure that the inclined wedge block is not easy to deform or wear, thereby extending the service life of the slider and greatly improving the operation stability of the mold.

[0008] In the aforementioned mold slider mechanism, the side of the inclined wedge facing away from the lower mold core is a locking bevel that slopes gradually from top to bottom, away from the lower mold core. When the movable mold and the fixed mold are closed, the locking bevel abuts against the fixed mold. The inclined guide groove is provided on the side of the inclined wedge facing the guide portion. The locking bevel of the inclined wedge serves as the clamping force-bearing surface of the slider. Providing the inclined guide groove on the side of the inclined wedge facing the guide portion allows the inclined guide groove to avoid the locking bevel, thus avoiding the situation where the locking bevel's strength would be reduced by providing the inclined guide groove. This allows the inclined wedge to stably withstand the clamping pressure and improves the life of the slider.

[0009] In the aforementioned mold slider mechanism, the base has a stepped surface on the side facing away from the lower mold core, and the angled wedge is positioned on the stepped surface. The angled wedge is connected to the base via fasteners. Mounting the angled wedge via the stepped surface ensures stable installation. The fastener connection between the angled wedge and the base facilitates installation and provides excellent stability.

[0010] In the aforementioned mold slider mechanism, the support plane is horizontally arranged, and the movable mold further comprises a guide surface perpendicularly connected to the support plane. The guide structure is disposed on this guide surface. The support plane ensures stable translation of the wear-resistant plate and the slider, while the guide surface provides a relatively flat mounting surface for the guide structure, making installation easy and stable. This in turn provides precise guidance for the slider, ensuring stable movement and high operational precision.

[0011] In the slider mechanism of the above-mentioned mold, the guide part is plate-shaped and parallel to the guide surface. The guide structure includes an upper guide rail and a lower guide rail both horizontally arranged on the guide surface. The bottom surface of the upper guide rail is provided with a strip-shaped protrusion 1, and a guide groove 1 with an opening facing downward is formed between the strip-shaped protrusion 1 and the guide surface. The top surface of the lower guide rail is provided with a strip-shaped protrusion 2, and a guide groove 2 with an opening facing upward is formed between the strip-shaped protrusion 2 and the guide surface. The guide part is in contact with the guide surface. The top of the guide part has a strip-shaped sliding part 1 that slides with the guide groove 1, and the bottom of the guide part has a strip-shaped sliding part 2 that slides with the guide groove 2. The design of the guide structure can limit the vertical and horizontal freedom of the guide part, that is, the direction perpendicular to the guide surface, so that the slider can stably translate along the length direction of the upper guide rail and the lower guide rail. The top and bottom of the guide part are supported and guided by the upper guide rail and the lower guide rail respectively, so that the slider has good balance and the slider movement process is more stable. Moreover, the upper guide rail and the lower guide rail form a force sharing, which can protect the upper guide rail and the lower guide rail from deformation and extend the service life, thereby providing a more stable and precise guide for the slider.

[0012] In the slider mechanism of the mold described above, the guide surface is further provided with a horizontally arranged intermediate guide rail located between the upper and lower guide rails. The side of the guide portion facing the guide surface is provided with a strip-shaped guide groove that slidably engages with the intermediate guide rail. With the addition of the intermediate guide rail, it, along with the upper and lower guide rails, guides the slider, providing a larger guiding area and improving the stability and precision of the slider's operation. Furthermore, the intermediate guide rail further distributes the vertical forces acting on the upper and lower guide rails, making each guide rail less susceptible to deformation and extending its service life, thereby providing more stable and precise guidance for the slider.

[0013] In the slider mechanism of the aforementioned mold, a connecting shaft parallel to the lower guide rail is connected to the guide portion. A limit seat is fixedly attached to the outer wall of the movable mold, and the connecting shaft passes through the limit seat. A spring is mounted on the connecting shaft, which drives the slider away from the lower mold core. During mold opening, the spring force assists in the slider's movement. Furthermore, the spring force prevents the slider from loosening in its extended position. Therefore, the spring also serves as a travel limiter during the slider's movement. This ensures that the puller block on the fixed mold accurately slides into the inclined guide groove on the inclined wedge block during mold closing, improving the stability and reliability of the sliding mechanism.

[0014] In the aforementioned mold slider mechanism, the inclined guide groove is a through groove that slopes gradually away from the lower mold core from top to bottom. The upper end of the inclined guide groove has a bell-shaped opening that gradually increases in size from bottom to top. This bell-shaped design allows for a larger opening at the upper end of the inclined guide groove, enabling the puller to slide precisely into the inclined guide groove during mold closing, thereby improving the stability and reliability of the sliding mechanism.

[0015] In the aforementioned mold's slider mechanism, the shift block is rectangular, with a shifting flap perpendicularly connected to one side of the block. This flap is inserted into the oblique guide groove. This structure provides a simple shift block and occupies little space, resulting in a compact and space-saving slider mechanism. The shifting flap is integrally formed with the shift block, ensuring high strength and resistance to deformation, thereby providing stable and reliable movement of the slider.

[0016] Compared with the existing technology, the slider mechanism of this mold has the following advantages:

[0017] 1. This slider mechanism utilizes a side-mounted guide structure, while the bottom of the slider is supported by a wear-resistant sheet. This ensures the slider's positioning accuracy and balance, ensuring a consistently high level of fit between the slider and the side guide structure. Furthermore, because the wear-resistant sheet bears the mold clamping pressure, it effectively protects the guide structure, preventing wear caused by excessive force. This ensures consistently high guidance accuracy, ensuring slider operation accuracy, extending service life, and significantly improving mold operation stability.

[0018] 2. Compared with the traditional structure that relies on inclined guide pillars to drive the slider to move, this slider mechanism has the advantage of occupying less space due to its more compact structure. In addition, when the parting surface is relatively steep, this slider mechanism has a better applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the movable mold and the fixed mold in the clamping state of the present invention.

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention after the fixed mold is hidden.

[0022] Figure 4 yes Figure 3 The structure shown is a schematic diagram of the structure after the slider is hidden.

[0023] Figure 5 It's the explosion of the slider Figure 1 .

[0024] Figure 6 It's the explosion of the slider Figure 2 .

[0025] Figure 7 It is a partial cross-sectional view of the slider mechanism of this mold.

[0026] Figure 8 It is a structural diagram of the shift block and the inclined wedge block.

[0027] Figure 9 It is a structural diagram of the fixed mold and the shift block.

[0028] Figure 10 It is a schematic diagram of the guide structure in the second embodiment of the present invention.

[0029] In the figure, 1, movable mold; 1a, lower mold core; 1b, supporting plane; 1c, guide surface; 2, fixed mold; 3, slider; 31, base; 311, guide part; 312, forming protrusion; 313, step surface; 314, strip sliding part 1; 315, strip sliding part 2; 316, strip guide groove; 32, inclined wedge block; 321, inclined guide groove; 321a, bell mouth; 322, locking inclined surface; 4, shift block; 41, shifting edge; 5, wear-resistant sheet; 6, fastener; 7, upper guide rail; 71, strip protrusion 1; 8, lower guide rail; 81, strip protrusion 2; 9, guide groove 1; 10, guide groove 2; 11, connecting shaft; 12, limit seat; 13, spring; 14, bolt; 15, dovetail groove guide rail; 16, dovetail groove; 17, middle guide rail. DETAILED DESCRIPTION

[0030] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0031] Example 1

[0032] like Figure 1 、 Figure 2 and Figure 3 As shown, in the guide area of ​​this mold, the mold includes a movable mold 1 and a fixed mold 2 located above the movable mold 1. The movable mold 1 is provided with a lower mold core 1a. This guide area includes a slider 3 with an inclined guide groove 321 that is slidably set on the movable mold 1, and a shift block 4 that is inserted into the inclined guide groove 321 is provided on the fixed mold 2. When the mold is closed, a cavity is formed between the movable mold 1 and the fixed mold 2. When the mold is opened, the movable mold 1 moves downward. At this time, since the shift block 4 is inserted into the inclined guide groove 321, the shift block 4 installed on the fixed mold 2 can be used to drive the slider 3 to slide outward during the downward movement of the movable mold 1, thereby realizing the core pulling of the undercut part of the product.

[0033] like Figure 3 and Figure 4As shown, a wear-resistant plate 5 is fixed to the bottom surface of the slider 3. Specifically, the wear-resistant plate 5 is fixed to the slider 3 by bolts 14. The movable mold 1 has a support plane 1b that supports the wear-resistant plate 5. The slider 3 has a guide portion 311 located on its side. The movable mold 1 is provided with a guide structure that forms a sliding fit with the guide portion 311. The support plane 1b is arranged horizontally. The movable mold 1 also has a guide surface 1c vertically connected to the support plane 1b. The guide structure is arranged on the guide surface 1c. This structure ensures that after the mold is closed, the mold closing pressure applied to the slider 3 by the fixed mold 2 is borne by the wear-resistant plate 5 on the lower side of the slider 3, rather than by the guide structure. Since the material of the wear-resistant plate 5 itself has sufficient hardness and high wear resistance to withstand the friction of movement, the bottom of the slider 3 is supported by the wear-resistant plate 5, so that the position accuracy and balance of the slider 3 are guaranteed, thereby ensuring that the slider 3 always has a high fit accuracy with the guide structure on its side. At the same time, this can also effectively protect the guide structure and prevent the guide structure from being worn due to excessive force, thereby enabling the guide structure to always maintain a high guiding accuracy.

[0034] like Figure 4 and Figure 5 As shown, the guide portion 311 is plate-shaped and parallel to the guide surface 1c. The guide structure includes an upper guide rail 7 and a lower guide rail 8, both horizontally disposed on the guide surface 1c. The bottom surface of the upper guide rail 7 has a strip-shaped protrusion 71, which forms a downward-facing guide groove 9 between the strip-shaped protrusion 71 and the guide surface 1c. The top surface of the lower guide rail 8 has a strip-shaped protrusion 81, which forms an upward-facing guide groove 10 between the strip-shaped protrusion 81 and the guide surface 1c. The guide portion 311 is in contact with the guide surface 1c. The top of the guide portion 311 has a strip-shaped sliding portion 314 that slidably engages with the guide groove 9, and the bottom of the guide portion 311 has a strip-shaped sliding portion 315 that slidably engages with the guide groove 10. The guide surface 1c also has an intermediate guide rail 17 horizontally disposed between the upper guide rail 7 and the lower guide rail 8. The side of the guide portion 311 facing the guide surface 1c has a strip-shaped guide groove 316 that slidably engages with the intermediate guide rail 17. After the middle guide rail 17 is added, the middle guide rail 17, the upper guide rail 7 and the lower guide rail 8 together guide the slider 3, providing a larger guiding area for the slider 3 and improving the stability and accuracy of the slider 3.

[0035] like Figure 3 and Figure 4As shown, the guide portion 311 is connected to a connecting shaft 11 parallel to the lower guide rail 8. A limit seat 12 is fixedly connected to the outer wall of the movable mold 1, and the connecting shaft 11 passes through the limit seat 12. A spring 13 is sleeved on the connecting shaft 11, which can drive the slider 3 away from the lower mold core 1a. When the mold is opened, the force of the spring 13 can assist the slider 3 in sliding out. In addition, under the action of the spring 13, the slider 3 can remain in the slid-out state without loosening. Therefore, the spring 13 also serves as a travel limiter when the slider 3 slides out. This ensures that when the mold is closed, the pull block on the fixed mold 2 can slide accurately into the inclined guide groove 321 of the inclined wedge block 32, thereby improving the stability and reliability of the sliding mechanism.

[0036] like Figure 5 and Figure 6 As shown, the slider 3 includes a base 31 and an inclined wedge block 32. The hardness of the inclined wedge block 32 is greater than that of the base 31. Normally, the hardness of the inclined wedge block 32 is within the range of HRC48-52, which ensures that the inclined wedge block 32 is not easily deformed or worn. The base 31 has a molding protrusion 312 on the side close to the lower mold core 1a. The inclined wedge block 32 is connected to the side of the base 31 facing away from the lower mold core 1a, and the inclined guide groove 321 is provided on the side of the inclined wedge block 32 facing the guide portion 311. Specifically, the base 31 has a step surface 313 on the side facing away from the lower mold core 1a. The inclined wedge block 32 is matched and arranged on the step surface 313, and the inclined wedge block 32 is connected to the base 31 via a fastener 6. Figure 7 As shown, the side of the inclined wedge block 32 facing away from the lower mold core 1a features a locking bevel 322 that slopes gradually away from the lower mold core 1a from top to bottom. When the movable mold 1 and the fixed mold 2 are closed, the locking bevel 322 abuts against the fixed mold 2. The inclined guide groove 321 is a through groove that slopes gradually away from the lower mold core 1a from top to bottom. The upper end of the inclined guide groove 321 has a bell-shaped opening 321a that gradually increases in size from bottom to top. The design of the bell-shaped opening 321a allows for a larger opening at the upper end of the inclined guide groove 321, allowing the puller block to slide precisely into the inclined guide groove 321 during mold closing, improving the stability and reliability of the sliding mechanism.

[0037] like Figure 8 and Figure 9 As shown, the shift block 4 is in the shape of a rectangular plate, and a shifting edge 41 is vertically connected to one side of the shift block 4, and the shifting edge 41 is inserted into the inclined guide groove 321. The shift block 4 of this structure is relatively simple and occupies little space, so that the guide area has the advantages of compact structure and small space occupation.

[0038] Example 2

[0039] The structure and principle of this embodiment are basically the same as those of the first embodiment, except that Figure 10As shown, the guide structure includes a dovetail groove guide rail 15 horizontally arranged on the guide surface 1 c , and a dovetail groove 16 that slides with the dovetail groove guide rail 15 is provided on the guide portion 311 of the slider 3 .

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0041] Although this article uses more 1, movable mold; 1a, lower mold core; 1b, support plane; 1c, guide surface; 2, fixed mold; 3, slider; 31, base; 311, guide part; 312, molding protrusion; 313, step surface; 314, strip sliding part 1; 315, strip sliding part 2; 316, strip guide groove; 32, inclined wedge; 321, inclined guide groove; 321a, bell mouth; 322, locking bevel The present invention is described herein with reference to the following terms: surface; 4, shift block; 41, shifting edge; 5, wear-resistant sheet; 6, fastener; 7, upper guide rail; 71, bar protrusion 1; 8, lower guide rail; 81, bar protrusion 2; 9, guide groove 1; 10, guide groove 2; 11, connecting shaft; 12, limit seat; 13, spring; 14, bolt; 15, dovetail guide rail; 16, dovetail groove; 17, intermediate guide rail, etc., but the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. A slider mechanism of a mold, the mold comprising a movable mold (1) and a fixed mold (2) located above the movable mold (1), the slider mechanism comprising a slider (3) having an inclined guide groove (321) slidably arranged on the movable mold (1), the fixed mold (2) being provided with a shift block (4) inserted into the inclined guide groove (321), characterized in that: The slider (3) has a guide portion (311) located on its side, and a wear-resistant sheet (5) is fixedly connected to the bottom surface of the slider (3). The movable mold (1) has a support plane (1b) for supporting the wear-resistant sheet (5). The movable mold (1) is also provided with a guide structure that forms a sliding fit with the guide portion (311). The slider (3) includes a base (31) and an inclined wedge block (32). The hardness of the inclined wedge block (32) is greater than the hardness of the base (31). The movable mold (1) is provided with a lower mold core (1a). The side of the base (31) close to the lower mold core (1a) has a molding protrusion (312). The inclined wedge block (32) is connected to the side of the base (31) facing away from the lower mold core (1a). The inclined wedge block (32) faces away from the lower mold core (1a). The side surface is a locking inclined surface (322) which is gradually inclined from top to bottom in a direction away from the lower mold core (1a). When the movable mold (1) and the fixed mold (2) are closed, the locking inclined surface (322) abuts against the fixed mold (2). The inclined guide groove (321) is arranged on the side of the inclined wedge block (32) facing the guide portion (311). The side of the base (31) facing away from the lower mold core (1a) has a step surface (313). The inclined wedge block (32) is arranged on the step surface (313), and the inclined wedge block (32) and the base (31) are connected by a fastener (6). The inclined guide groove (321) is a through groove which is gradually inclined from top to bottom in a direction away from the lower mold core (1a). The upper end of the inclined guide groove (321) has a bell mouth (321a) whose opening gradually increases from bottom to top.

2. The slider mechanism of the mold according to claim 1, characterized in that: The supporting plane (1b) is arranged horizontally, and the movable mold (1) further comprises a guide surface (1c) vertically connected to the supporting plane (1b), and the guide structure is arranged on the guide surface (1c).

3. The slider mechanism of the mold according to claim 2, characterized in that: The guide portion (311) is plate-shaped and parallel to the guide surface (1c). The guide structure comprises an upper guide rail (7) and a lower guide rail (8) both of which are horizontally arranged on the guide surface (1c). The bottom surface of the upper guide rail (7) comprises a strip-shaped protrusion (71), and a guide groove (9) with an opening facing downward is formed between the strip-shaped protrusion (71) and the guide surface (1c). The top surface of the lower guide rail (8) comprises a strip-shaped protrusion (81), and a guide groove (10) with an opening facing upward is formed between the strip-shaped protrusion (81) and the guide surface (1c). The guide portion (311) is in contact with the guide surface (1c). The top of the guide portion (311) comprises a strip-shaped sliding portion (314) that is slidably engaged with the guide groove (9), and the bottom of the guide portion (311) comprises a strip-shaped sliding portion (315) that is slidably engaged with the guide groove (10).

4. The slider mechanism of the mold according to claim 3, characterized in that: The guide surface (1c) is further provided with a middle guide rail (17) located between the upper guide rail (7) and the lower guide rail (8) and arranged horizontally, and the guide portion (311) is provided with a strip guide groove (316) on the side facing the guide surface (1c) and slidably engaged with the middle guide rail (17).

5. The slider mechanism of the mold according to claim 3, characterized in that: The guide portion (311) is connected to a connecting shaft (11) parallel to the lower guide rail (8); a limit seat (12) is fixedly connected to the outer wall of the movable mold (1) and the connecting shaft (11) passes through the limit seat (12); and a spring (13) is sleeved on the connecting shaft (11) and is capable of driving the slider (3) to move in a direction away from the lower mold core (1a).

6. The slider mechanism of the mold according to claim 1, 2 or 3, characterized in that: The shift block (4) is in the shape of a rectangular plate, and a shifting edge (41) is vertically connected to one side of the shift block (4), and the shifting edge (41) is inserted into the oblique guide groove (321).

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