A molding die for a cap

Abstract

This utility model belongs to the field of molding die technology, and particularly relates to a molding die for a lid, including a fixed mold and a moving mold arranged opposite each other. A front mold core is provided on the side of the fixed mold facing the moving mold, and a groove is formed along its length on the front mold core. A first groove is formed on the inner bottom wall of the groove. Two sliders are symmetrically arranged on the moving mold, arranged along the length of the groove. Each slider has a protrusion. The side of the slider facing the fixed mold abuts against the upper end of the groove. The opposite ends of the protrusions on the two sliders fit together. The inner sidewall of the groove is inclined outward to form a first inclined surface, and the sidewall of the protrusion facing the first inclined surface is inclined inward to form a second inclined surface that fits against the first inclined surface. This utility model, through the cooperation of the first and second inclined surfaces, can prevent eccentricity between the groove, the first groove, the second groove, the mounting groove, and the mold core, effectively improving accuracy and stability.

Description

Technical Field

[0001] This utility model belongs to the field of molding die technology, and in particular relates to a molding die for a lid. Background Technology

[0002] To meet the demands of daily necessities, packaging, and other industries for cap products, the requirements for molding precision and assembly sealing are increasingly stringent. Existing cap molding dies mostly form cavities by combining a fixed mold, a moving mold, and a slider. However, the mating surfaces of the mold core and the slider of the moving mold are often straight, lacking guiding and positioning structures. During mold closing, positional misalignment can easily lead to cavity eccentricity. Furthermore, the coaxiality of the core and slider mounting grooves and slots relies excessively on overall machining precision. Long-term use will exacerbate deviations due to component wear, resulting in uneven cap wall thickness, dimensional errors, and low product qualification rates. Utility Model Content

[0003] The purpose of this invention is to provide a mold for a lid that can solve the above-mentioned problems.

[0004] To achieve the above objectives, this utility model provides a mold for forming a lid, including a fixed mold and a moving mold arranged opposite to each other. A front mold core is provided on the side of the fixed mold facing the moving mold. A groove is provided on the front mold core along its length direction. A first groove is provided on the inner bottom wall of the groove. The moving mold has two sliders symmetrically arranged vertically along the length of the groove. Each slider has a protrusion. The side of the slider facing the fixed mold abuts against the upper end of the groove. The opposite ends of the protrusions on the two sliders fit together, and the two protrusions are adapted to the groove. The two protrusions have a second groove coaxial with the first groove at their opposite ends, and the two sliders have a mounting groove coaxial with the second groove at their opposite ends from the fixed mold. The second groove and the mounting groove are connected by a through hole. The moving mold is provided with a core coaxial with the through hole. One end of the core extends into the mounting groove and abuts against the inner bottom wall of the mounting groove. The end of the core extending into the mounting groove is provided with a protrusion. The protrusion passes through the through hole and the second groove and extends into the first groove to form a cavity for molding the cover. The inner wall of the groove slopes outward to form a first inclined surface, and the side wall of the protrusion facing the first inclined surface slopes inward to form a second inclined surface that fits against the first inclined surface.

[0005] Optionally, the moving mold includes a movable plate and a fixed plate. Four first guide posts are arranged in a rectangular pattern on the fixed plate. The fixed plate is located on the side of the fixed plate facing the fixed mold. The movable plate is movably connected to the first guide posts. The slider is movably positioned on the side of the movable plate away from the fixed plate. The fixed plate is provided with a driving assembly. When the movable plate moves toward or away from the fixed mold, the two sliders can move in opposite or opposite directions through the driving assembly.

[0006] Optionally, the drive assembly includes four connecting blocks arranged in a rectangular shape. The connecting blocks extend toward the fixed mold direction, and the upper connecting block and the lower connecting block are arranged symmetrically vertically. The end of the connecting block facing the fixed mold is provided with an extrusion part, and the extrusion part on the upper connecting block is inclined upward. The two sliders are provided with oblique holes corresponding to the extrusion parts, and the extrusion parts extend into the oblique holes and are slidably connected to the oblique holes.

[0007] Optionally, it also includes guide rails, which are vertically arranged on the movable plate and at least two are spaced apart along the length of the slider. The slider is provided with a groove adapted to the guide rail, and the guide rail is slidably connected to the groove.

[0008] Optionally, the movable plate is further provided with two symmetrically arranged limiting blocks on both sides of the slider. Each of the two limiting blocks has a limiting groove formed on its opposite side along the movement direction of the slider. The two sides of the slider extend into the corresponding limiting grooves and are adapted to the limiting grooves. The slider is slidably connected to the limiting grooves.

[0009] Optionally, the fixed mold includes a first mounting plate, a second mounting plate, and a third mounting plate. The first mounting plate is disposed opposite to the movable plate. The front mold core is mounted on the first mounting plate. The second mounting plate is disposed on the side of the first mounting plate away from the movable plate. The third mounting plate is mounted on the side of the second mounting plate away from the first mounting plate. The first mounting plate has a flow channel on the side opposite to the front mold core. The flow channel has a liquid inlet hole and a liquid outlet hole. The liquid outlet hole penetrates the first mounting plate and communicates with the inner bottom wall of the first groove. The third mounting plate is provided with a nozzle, which penetrates the third mounting plate and the second mounting plate and communicates with the liquid inlet.

[0010] Optionally, the nozzle is snap-fitted to the liquid inlet.

[0011] Compared with the prior art, the beneficial effects of this utility model are: by the cooperation of the groove and the first groove on the front mold core of the fixed mold, and the second groove, the mounting groove and the core on the slider of the moving mold, a cavity for molding the cover can be formed. The cooperation of the first inclined surface and the second inclined surface can prevent the groove, the first groove, the second groove, the mounting groove and the core from being misaligned, which can effectively improve the accuracy and stability. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a perspective view of the moving mold and the fixed mold after the mold is opened.

[0014] Figure 2 This is a top view of the moving mold and the fixed mold after they are closed.

[0015] Figure 3 For along Figure 2 Sectional view along line AA in the middle.

[0016] Figure 4 This is a perspective view of the mold in this utility model.

[0017] Figure 5 This is one of the perspective views of the slider in this utility model.

[0018] Figure 6 This is the second perspective view of the slider in this utility model.

[0019] Figure 7 This is an exploded view of the fixed mold in this utility model.

[0020] In the picture: 100. Fixed mold; 110. First mounting plate; 111. Runner; 112. Liquid inlet; 113. Liquid outlet; 120. Second mounting plate; 130. Third mounting plate; 131. Nozzle; 200. Moving mold; 210. Core; 220. Movable plate; 221. Limiting block; 222. Limiting groove; 230. Fixed plate; 231. First guide post; 300, front mold core; 310, groove; 311, first groove; 312, first inclined surface; 400, slider; 410, protrusion; 411, second groove; 412, mounting groove; 413, second inclined surface; 420, inclined hole; 500. Connecting block; 510. Extrusion section; 600. Guide rail; 610. Slide groove; 700. Lid. Detailed Implementation

[0021] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0022] In the description of the embodiments of this utility model, it should be understood that if the embodiments of this utility model involve directional indications, such as up, down, left, right, front, back, inside, outside, etc., the orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the embodiments of this utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In this embodiment of the invention, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part of a structure. They can be mechanical or electrical connections. They can be direct connections or indirect connections through an intermediate medium, and can represent the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0025] like Figures 1 to 7 As shown, this utility model embodiment provides a molding die for a lid 700, including a fixed mold 100, a moving mold 200, and a guide rail 600 arranged opposite to each other.

[0026] A front mold core 300 is provided on the side of the fixed mold 100 facing the moving mold 200. A groove 310 is formed on the front mold core 300 along its length, and a first groove 311 is formed on the inner bottom wall of the groove 310. Two sliders 400 are symmetrically arranged vertically on the moving mold 200, extending along the length of the groove 310. Each slider 400 has a protrusion 410. The side of the slider 400 facing the fixed mold 100 abuts against the upper end of the groove 310. The opposite ends of the protrusions 410 on the two sliders 400 fit together, and the two protrusions 410 are adapted to the groove 310. A second groove 411, coaxial with the groove, is formed at the opposite ends of the two sliders 400 from the fixed mold 100. A mounting groove 412, coaxial with the second groove 411, is formed at the opposite ends of the two sliders 400 from the fixed mold 100. The second groove 411 and the mounting groove 412 are connected by a through hole.

[0027] The moving mold 200 is provided with a core 210 coaxial with the through hole. One end of the core 210 extends into the mounting groove 412 and abuts against the inner bottom wall of the mounting groove 412. The end of the core 210 extending into the mounting groove 412 is provided with a protrusion. The protrusion passes through the through hole and the second groove 411 and extends into the first groove 311 to form a cavity for molding the cover 700. That is, the cavity for molding the cover 700 can be formed by the cooperation of the groove 310 and the first groove 311 on the front mold core 300 of the fixed mold 100, the second groove 411 of the slider 400 on the moving mold 200, the mounting groove 412, and the core 210.

[0028] The inner wall of the groove 310 slopes outward to form a first inclined surface 312, and the side wall of the protrusion 410 facing the first inclined surface 312 slopes inward to form a second inclined surface 413 that fits against the first inclined surface 312. The cooperation between the first inclined surface 312 and the second inclined surface 413 can prevent eccentricity between the groove 310, the first groove 311, the second groove 411, the mounting groove 412 and the core 210, and can effectively improve accuracy and stability.

[0029] In one embodiment, the moving mold 200 includes a movable plate 220 and a fixed plate 230. The fixed plate 230 is provided with four first guide posts 231 arranged in a rectangular pattern. The fixed plate 230 is located on the side of the fixed plate 230 facing the fixed mold 100. The movable plate 220 is movably connected to the first guide posts 231 to ensure the stability of the movement of the movable plate 220.

[0030] The sliders 400 are movably positioned on the side of the movable plate 220 away from the fixed plate 230. A drive assembly is provided on the fixed plate 230. When the movable plate 220 moves towards or away from the fixed mold 100, the two sliders 400 can move in opposite or towards directions via the drive assembly. It should be noted that the inner wall of the second groove 411 has a threaded layer. Driven by the drive assembly, the two sliders 400 move in opposite or towards directions to open or form the second groove 411, allowing the cover 700 to disengage from or form the cover 700. Furthermore, the fixed plate 230 has mounting holes, and hydraulic cylinders (not shown in the figure) are installed in these mounting holes. The hydraulic cylinders drive the movable plate 220 to move towards or away from the fixed mold 100.

[0031] Specifically, the drive assembly includes four rectangularly distributed connecting blocks 500. Each connecting block 500 extends towards the fixed mold 100, with the upper connecting block 500 and the lower connecting block 500 arranged symmetrically. An extrusion part 510 is provided at the end of each connecting block 500 facing the fixed mold 100. The extrusion part 510 on the upper connecting block 500 is inclined upwards. Two sliders 400 are provided with oblique holes 420 corresponding to the extrusion parts 510. The extrusion parts 510 extend into and are slidably connected to the oblique holes 420. That is, when the movable plate 220 moves, the extrusion part 510 can push the sliders 400 to move in opposite or opposite directions. This drive method is simple and reliable, ensuring the stability of the slider 400's movement.

[0032] To ensure the stability of the slider 400's movement, a guide rail 600 is also installed. Specifically, the guide rail 600 is vertically arranged on the movable plate 220, and at least two are spaced apart along the length of the slider 400. In this embodiment, two sliders 400 are preferred. The slider 400 is provided with a groove 610 that matches the guide rail 600. The guide rail 600 and the groove 610 are slidably connected, that is, the slider 400 is guided by the cooperation between the guide rail 600 and the groove 610.

[0033] In one embodiment, the movable plate 220 is further provided with two symmetrically arranged limiting blocks 221 on both sides of the slider 400. Each of the two limiting blocks 221 has a limiting groove 222 formed on the opposite side along the movement direction of the slider 400. The two sides of the slider 400 extend into the corresponding limiting groove 222 and are adapted to the limiting groove 222. The slider 400 is slidably connected to the limiting groove 222. The setting of the limiting groove 222 can further improve the stability of the slider 400 movement and ensure its installation stability, preventing the slider 400 from falling off.

[0034] In one embodiment, the fixed mold 100 includes a first mounting plate 110, a second mounting plate 120, and a third mounting plate 130. The first mounting plate 110 is disposed opposite to the movable plate 220. The front mold core 300 is mounted on the first mounting plate 110. The second mounting plate 120 is disposed on the side of the first mounting plate 110 away from the movable plate 220. The third mounting plate 130 is disposed on the side of the second mounting plate 120 away from the first mounting plate 110. Further, a flow channel 111 is provided on the side of the first mounting plate 110 opposite to the front mold core 300. The flow channel 111 has an inlet hole 112 and an outlet hole 113. The outlet hole 113 penetrates the first mounting plate 110 and communicates with the inner bottom wall of the first groove 311. A nozzle 131 is provided on the third mounting plate 130, penetrating both the third mounting plate 130 and the second mounting plate 120 and communicating with the inlet hole 112. The casting material flows evenly into the mold cavity through the nozzle 131 and the runner 111, forming the cover 700. Furthermore, the nozzle 131 is snap-fitted to the liquid inlet 112. Specifically, the lower end of the nozzle 131 is provided with a groove, and the inner wall of the liquid inlet 112 is provided with an annular protrusion. The annular protrusion is engaged with the groove, allowing the cold slug well on the runner 111 to be stably demolded.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mold for forming a lid, characterized in that, It includes a fixed mold and a moving mold arranged opposite to each other. The fixed mold has a front mold core on the side facing the moving mold. The front mold core has a groove opened along its length direction. The inner bottom wall of the groove has a first groove. The moving mold has two sliders symmetrically arranged vertically along the length of the groove. Each slider has a protrusion. The side of the slider facing the fixed mold abuts against the upper end of the groove. The opposite ends of the protrusions on the two sliders fit together, and the two protrusions are adapted to the groove. The two protrusions have a second groove coaxial with the first groove at their opposite ends, and the two sliders have a mounting groove coaxial with the second groove at their opposite ends from the fixed mold. The second groove and the mounting groove are connected by a through hole. The moving mold is provided with a core coaxial with the through hole. One end of the core extends into the mounting groove and abuts against the inner bottom wall of the mounting groove. The end of the core extending into the mounting groove is provided with a protrusion. The protrusion passes through the through hole and the second groove and extends into the first groove to form a cavity for molding the cover. The inner wall of the groove slopes outward to form a first inclined surface, and the side wall of the protrusion facing the first inclined surface slopes inward to form a second inclined surface that fits against the first inclined surface.

2. The molding die for the lid according to claim 1, characterized in that, The moving mold includes a movable plate and a fixed plate. Four first guide pillars are arranged in a rectangular pattern on the fixed plate. The fixed plate is located on the side of the fixed plate facing the fixed mold. The movable plate is movably connected to the first guide pillars. The slider is movably positioned on the side of the movable plate away from the fixed plate. The fixed plate is provided with a driving assembly. When the movable plate moves toward or away from the fixed mold, the two sliders can move in opposite or opposite directions through the driving assembly.

3. The mold for forming the lid according to claim 2, characterized in that, The drive assembly includes four connecting blocks arranged in a rectangular shape. The connecting blocks extend toward the fixed mold direction, and the upper connecting block and the lower connecting block are arranged symmetrically vertically. The end of the connecting block facing the fixed mold is provided with an extrusion part, and the extrusion part on the upper connecting block is inclined upward. The two sliders are provided with oblique holes corresponding to the extrusion parts, and the extrusion parts extend into the oblique holes and are slidably connected to the oblique holes.

4. The mold for forming the lid according to claim 2, characterized in that, Also includes: Guide rails are vertically arranged on the movable plate, and at least two are spaced apart along the length of the slider. The slider is provided with a groove that matches the guide rail, and the guide rail is slidably connected to the groove.

5. The mold for forming the lid according to claim 2, characterized in that, The movable plate is also provided with two symmetrically arranged limiting blocks on both sides of the slider. Each of the two limiting blocks has a limiting groove formed on the opposite side along the movement direction of the slider. The two sides of the slider extend into the corresponding limiting groove and are adapted to the limiting groove. The slider is slidably connected to the limiting groove.

6. The mold for forming the lid according to claim 2, characterized in that, The fixed mold includes a first mounting plate, a second mounting plate, and a third mounting plate. The first mounting plate is disposed opposite to the movable plate. The front mold core is mounted on the first mounting plate. The second mounting plate is disposed on the side of the first mounting plate away from the movable plate. The third mounting plate is mounted on the side of the second mounting plate away from the first mounting plate. The first mounting plate has a flow channel on the side opposite to the front mold core. The flow channel has a liquid inlet hole and a liquid outlet hole. The liquid outlet hole penetrates the first mounting plate and communicates with the inner bottom wall of the first groove. The third mounting plate is provided with a nozzle, which penetrates the third mounting plate and the second mounting plate and communicates with the liquid inlet.

7. The mold for forming the lid according to claim 6, characterized in that, The nozzle is snapped into place with the liquid inlet.

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