Threaded cap forming die

Abstract

The utility model discloses a threaded cap forming die which comprises a lower die frame and a top plate assembly arranged below the lower die frame, the threaded cap forming die further comprises a male die, a top column and a rod sleeve, the male die is fixedly connected to the lower die frame, the male die is movably connected with the top column in a sleeved mode, a buckle forming structure is arranged at the upper end of the top column, the upper end of the top column is spliced with the top of the male die, and the top column penetrates through the lower die frame. The lower end of the top column is connected with the top plate assembly, the rod sleeve is fixedly arranged between the top column and the lower die frame and movably connected with the top column in a sleeved mode, the top column is connected with a guide pin, a guide structure capable of enabling the guide pin to rotate is arranged on the rod sleeve, the guide pin is connected with the guide structure, and the guide pin can drive the top column to rotate. According to the utility model, the molded threaded cover can be smoothly demoulded, and the inverted buckle in the connecting hole is not damaged in the ejection core-pulling process.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to a threaded cover molding mold. Background Art

[0002] In the field of injection molds, for injection molded parts with holes, core pulling is generally used for molding and demolding. There are many ways to pull the core, including side core pulling, ejection core pulling, rotary core pulling and so on.

[0003] Figure 1-Figure 2 The figures are all threaded caps in automobile accessories. The threaded cap 111 has a connection hole 112. A plurality of undercuts 113 are arranged in a ring-shaped interval. It can be seen that the connection hole 112 can be molded and demolded by ejecting the core. However, the ejecting and demolding process will inevitably conflict with the molding and demolding of the undercuts 113. Simple ejecting and demolding will definitely damage the undercuts 113. Summary of the invention

[0004] The utility model aims to provide a threaded cover forming die, which adopts an ejection and rotation method, can make the threaded cover smoothly demould after being formed, and will not damage the undercut in the connecting hole during the ejection and core pulling process.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is: a threaded cover forming mold, including a lower mold frame and a top plate assembly, the top plate assembly is arranged below the lower mold frame, and also includes a punch, a top column and a rod sleeve, the punch is fixedly connected to the lower mold frame, the punch is movably sleeved with the top column, the upper end of the top column is provided with a snap-on forming structure, the upper end of the top column is spliced ​​with the top of the punch, the top column passes through the lower mold frame, the lower end of the top column is connected to the top plate assembly, the rod sleeve is fixedly arranged between the top column and the lower mold frame, the rod sleeve is movably sleeved with the top column, the top column is connected with a guide pin, the rod sleeve is provided with a guide structure that can rotate the guide pin, the guide pin is connected to the guide structure, and the guide pin can drive the top column to rotate; the snap-on forming structure includes a plurality of undercut forming parts, and the plurality of undercut forming parts are arranged in a ring-shaped interval.

[0006] Compared with the prior art, the utility model has the advantages that: for the undercut structure arranged in an annular interval in the threaded cover, the buckle forming structure design at the upper end of the ejector pin accurately matches the shape and position requirements of the undercut. During the demoulding process, the ejector pin combines the rotating action during the ejection process to enable the formed undercut to smoothly detach from the undercut forming part.

[0007] Rotational ejection process: The ejector plate assembly is driven upward by an external drive device, and the ejector column connected to the ejector plate assembly is subjected to the force of upward movement. Similarly, the guide pin connected to the ejector column is also subjected to the force of upward movement. After being subjected to the force, the guide pin performs a rotational upward movement along the guide structure, and the ejector column also performs a rotational upward movement under the guidance of the guide pin. After the ejector column rotates, the undercut forming part on the ejector column is misaligned with the undercut after forming, thereby achieving the goal of not damaging the undercut in the connecting hole during the ejection core pulling process.

[0008] In some embodiments of the utility model, the guide pin is arranged to penetrate radially along the ejector column, the guide structure includes a first slide groove and a second slide groove, and the two ends of the guide pin are respectively matched with the first slide groove and the second slide groove. The guide pin is arranged to penetrate radially and the double slide groove design is matched to ensure the precise guidance of the ejector column during the rotation process, improve the smoothness and stability of the demoulding action, effectively avoid jamming or wear, and extend the service life of the mold.

[0009] In some embodiments of the utility model, the first slide groove and the second slide groove are respectively located on opposite sides of the rod sleeve, the first slide groove includes a first vertical section and a first spiral section, and the first vertical section and the first spiral section are bent and transitioned; the second slide groove includes a second vertical section and a second spiral section, and the second vertical section and the second spiral section are bent and transitioned; the first vertical section and the second vertical section are arranged opposite to each other and both are parallel to the axis of the rod sleeve, and the first spiral section and the second spiral section are in opposite directions. Through the careful design of the vertical section and the spiral section of the first and second slide grooves, the efficient conversion of the linear motion of the guide pin to the rotational motion is achieved, the energy transfer efficiency is improved, the top column rotates more smoothly, and the perfect demoulding of the undercut molding part is ensured, while reducing the potential damage to the mold and the product.

[0010] In some embodiments of the utility model, a bearing sleeve is fixedly connected in the top plate assembly, and the lower end of the top column is connected to the bearing sleeve. The bearing sleeve built into the top plate assembly is directly connected to the lower end of the top column, which significantly improves the load-bearing capacity and stability of the top column during rotation, reduces friction loss, ensures the continuity and accuracy of the rotation action, and extends the working life of the equipment.

[0011] In some embodiments of the utility model, it also includes an upper mold frame, a die, a first side slider and a second side slider, the upper mold frame is connected to the lower mold frame in an up-and-down manner, the die and the punch are arranged in an up-and-down manner, and the die and the upper mold are fixedly connected; the first side slider and the second side slider are both movably arranged between the upper mold frame and the lower mold frame, the first side slider is located on the left side of the punch, and the first side slider is respectively spliced ​​with the die and the punch, the second side slider is located on the left side of the punch, and the second side slider is respectively spliced ​​with the die and the punch, and the first side slider and the second side slider are both connected to the upper mold frame through inclined guide columns.

[0012] In some embodiments of the utility model, a first insert is connected to the side of the first side slider facing the male mold, the first insert is connected to the female mold and the male mold respectively, and the first insert is provided with a first molding part. The first insert on the first side slider directly participates in the molding process, and the precise splicing with the female mold and the male mold ensures the high-precision manufacturing of the first molding part, simplifies the mold structure, shortens the molding cycle, and improves the product quality and production efficiency.

[0013] In some embodiments of the utility model, a second insert is connected to the side of the second side slider facing the male mold, the second insert is connected to the female mold and the male mold respectively, and the second insert is provided with a second molding part. The second insert equipped with the second side slider is also precisely docked with the female mold and the male mold to establish a second molding part. This design further expands the molding range and complexity processing capability of the mold, can complete the molding of more diverse threaded cover structures, and enhances the comprehensive application value of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the threaded cover;

[0015] Figure 2 It is a cross-sectional view of the threaded cap;

[0016] Figure 3 It is a partial structural schematic diagram of the utility model;

[0017] Figure 4 This utility model is cut away Figure 1 ;

[0018] Figure 5 This utility model is cut away Figure 2 ;

[0019] Figure 6 It is a schematic diagram of partial structural decomposition of the utility model;

[0020] Figure 7 It is a schematic diagram of the structure of the first slide groove on the rod sleeve;

[0021] Figure 8 This is a schematic diagram of the second slide groove structure on the rod sleeve.

[0022] In the figure: 1. lower mold frame; 2. top plate assembly; 3. punch; 4. ejector column; 5. rod sleeve; 6. snap-fit ​​molding structure; 7. guide pin; 8. guide structure; 601. undercut molding part; 801. first slide groove; 802. second slide groove; 9. bearing set; 10. upper mold frame; 11. die; 12. first side slider; 13. second side slider; 14. inclined guide column; 15. first insert; 16. second insert; 111. threaded cover. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0024] In the description of the present invention, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific protection scope of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present utility model are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0026] The terms "including" and "having" and any variations thereof in the specification and claims of the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, product or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to these processes, methods, products or apparatuses.

[0027] like Figure 3-Figure 8As shown, a threaded cover forming mold includes a lower mold frame 1 and a top plate assembly 2, the top plate assembly 2 is arranged below the lower mold frame 1, and also includes a punch 3, a top column 4 and a rod sleeve 5, the punch 3 is fixed to the lower mold frame 1, the punch 3 and the top column 4 are movably sleeved, the upper end of the top column 4 is provided with a snap-on forming structure 6, the upper end of the top column 4 is spliced ​​with the top of the punch 3, the top column 4 passes through the lower mold frame 1, the lower end of the top column 4 is connected to the top plate assembly 2, the rod sleeve 5 is fixedly arranged between the top column 4 and the lower mold frame 1, the rod sleeve 5 is movably sleeved with the top column 4, the top column 4 is connected with a guide pin 7, the rod sleeve 5 is provided with a guide structure 8 that can rotate the guide pin 7, the guide pin 7 is connected to the guide structure 8, and the guide pin 7 can drive the top column 4 to rotate; the snap-on forming structure 6 includes a plurality of undercut forming parts 601, and the plurality of undercut forming parts 601 are arranged in a ring-shaped interval.

[0028] In the above structure, the undercut structure arranged in an annular space in the threaded cover 111 is precisely matched with the shape and position requirements of the undercut by designing the snap forming structure 6 at the upper end of the top column 4. During the demoulding process, the top column 4 combines the rotation action during the ejection process to facilitate the undercut after molding to smoothly detach from the undercut forming part 601.

[0029] Rotational ejection process: the ejector plate assembly 2 is driven to move upward by an external driving device, and the ejector column 4 connected to the ejector plate assembly 2 is subjected to an upward force. Similarly, the guide pin 7 connected to the ejector column 4 is also subjected to an upward force. After receiving the force, the guide pin 7 performs a rotational upward movement along the guide structure 8. The ejector column 4 also performs a rotational upward movement under the guidance of the guide pin 7. After the ejector column 4 rotates, the undercut forming part 601 on the ejector column 4 is misaligned with the formed undercut, thereby achieving the goal of not damaging the undercut in the connecting hole during the ejection core pulling process.

[0030] Specifically, the guide pin 7 is arranged to penetrate the top column 4 in the radial direction, and the guide structure 8 includes a first slide groove 801 and a second slide groove 802. The two ends of the guide pin 7 are respectively matched with the first slide groove 801 and the second slide groove 802. The radial penetration arrangement of the guide pin 7 and the double slide groove design ensure the precise guidance of the top column 4 during the rotation process, improve the smoothness and stability of the demoulding action, effectively avoid jamming or wear, and extend the service life of the mold.

[0031] Specifically, the first slide groove 801 and the second slide groove 802 are respectively located on opposite sides of the rod sleeve 5. The first slide groove 801 includes a first vertical section and a first spiral section, and the first vertical section and the first spiral section are bent and transitioned; the second slide groove 802 includes a second vertical section and a second spiral section, and the second vertical section and the second spiral section are bent and transitioned; the first vertical section and the second vertical section are arranged oppositely and both are parallel to the axial direction of the rod sleeve 5, and the first spiral section and the second spiral section are in opposite directions. Through the careful design of the vertical section and the spiral section of the first and second slide grooves 802, the efficient conversion of the linear motion of the guide pin 7 to the rotational motion is achieved, the energy transfer efficiency is improved, the top column 4 rotates more smoothly, and the perfect demoulding of the undercut molding part 601 is ensured, while reducing the potential damage to the mold and the product.

[0032] Specifically, a bearing sleeve 9 is fixedly connected in the top plate assembly 2, and the lower end of the top column 4 is connected to the bearing sleeve 9. The bearing sleeve 9 built into the top plate assembly 2 is directly connected to the lower end of the top column 4, which significantly improves the bearing capacity and stability of the top column 4 during rotation, reduces friction loss, ensures the continuity and accuracy of the rotation action, and extends the working life of the equipment.

[0033] Specifically, it also includes an upper mold frame 10, a die 11, a first side slider 12 and a second side slider 13. The upper mold frame 10 is connected to the lower mold frame 1 up and down, the die 11 and the punch 3 are arranged up and down, and the die 11 is fixed to the upper mold frame 10; the first side slider 12 and the second side slider 13 are both movably arranged between the upper mold frame 10 and the lower mold frame 1, the first side slider 12 is located on the left side of the punch 3, and the first side slider 12 is respectively spliced ​​with the die 11 and the punch 3, the second side slider 13 is located on the left side of the punch 3, and the second side slider 13 is respectively spliced ​​with the die 11 and the punch 3, and the first side slider 12 and the second side slider 13 are both connected to the upper mold frame 10 through an inclined guide column 14.

[0034] Specifically, the first side slider 12 is connected to the side facing the punch 3 with a first insert 15, which is connected to the die 11 and the punch 3 respectively, and is provided with a first molding portion. The first insert 15 on the first side slider 12 directly participates in the molding process, and the precise splicing with the die 11 and the punch 3 ensures the high-precision manufacturing of the first molding portion, simplifies the mold structure, shortens the molding cycle, and improves the product quality and production efficiency.

[0035] Specifically, the second side slider 13 is connected to the side facing the punch 3 with a second insert 16, which is connected to the die 11 and the punch 3 respectively, and is provided with a second molding portion. The second insert 16 equipped with the second side slider 13 is also precisely docked with the die 11 and the punch 3 to establish a second molding portion. This design further expands the molding range and complexity processing capability of the mold, can complete the molding of more diverse threaded cover structures, and enhances the comprehensive application value of the mold.

[0036] The above describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A threaded cap forming mold, comprising a lower mold frame and a top plate assembly, wherein the top plate assembly is arranged below the lower mold frame, and is characterized in that: It also includes a punch, a push column and a rod sleeve, the punch being fixedly connected to the lower mold frame, the punch being movably sleeved with the push column, the upper end of the push column being provided with a snap-fit ​​molding structure, the upper end of the push column being spliced ​​with the top of the punch, the push column passing through the lower mold frame, the lower end of the push column being connected to the top plate assembly, the rod sleeve being fixedly arranged between the push column and the lower mold frame, the rod sleeve being movably sleeved with the push column, the push column being connected with a guide pin, the rod sleeve being provided with a guide structure that can rotate the guide pin, the guide pin being connected to the guide structure, and the guide pin can drive the push column to rotate.

2. A threaded cap forming mold according to claim 1, characterized in that: The guide pin is arranged to penetrate radially along the top column, the guide structure includes a first slide groove and a second slide groove, and two ends of the guide pin are respectively matched with the first slide groove and the second slide groove.

3. The threaded cap forming mold according to claim 2, characterized in that: The first slide groove and the second slide groove are respectively located on two opposite sides of the rod sleeve, the first slide groove includes a first vertical section and a first spiral section, and the first vertical section and the first spiral section have a bending transition; the second slide groove includes a second vertical section and a second spiral section, and the second vertical section and the second spiral section have a bending transition; the first vertical section and the second vertical section are arranged opposite to each other and both are parallel to the axial direction of the rod sleeve, and the first spiral section and the second spiral section are in opposite directions.

4. The threaded cap forming mold according to claim 1, characterized in that: A bearing sleeve is fixedly connected in the top plate assembly, and the lower end of the top column is connected to the bearing sleeve.

5. The threaded cap forming mold according to claim 1, characterized in that: It also includes an upper mold frame, a die, a first side slider and a second side slider, the upper mold frame is connected to the lower mold frame in an up-and-down manner, the die and the punch are arranged in an up-and-down manner, and the die and the upper mold are fixedly connected; the first side slider and the second side slider are both movably arranged between the upper mold frame and the lower mold frame, the first side slider is located on the left side of the punch, and the first side slider is respectively spliced ​​with the die and the punch, the second side slider is located on the left side of the punch, and the second side slider is respectively spliced ​​with the die and the punch, and the first side slider and the second side slider are both connected to the upper mold frame through inclined guide columns.

6. The threaded cap forming mold according to claim 5, characterized in that: A first insert is connected to the side of the first side sliding block facing the male mold. The first insert is respectively connected to the female mold and the male mold. The first insert is provided with a first molding portion.

7. The threaded cap forming mold according to claim 6, characterized in that: A second insert is connected to the side of the second side sliding block facing the male mold, the second insert is respectively connected to the female mold and the male mold, and the second insert is provided with a second molding portion.

Images