Bolt integral forming and demolding mold

Abstract

The utility model relates to the field of bolt processing, and discloses a bolt integral forming and demoulding mould which comprises an upper mould, a lower mould and a forming structure arranged in the lower mould and used for forming a threaded section of a bolt. The mounting column is arranged on the lower mold and provided with a threaded section forming cavity, the demolding driving module is arranged on the lower mold and used for driving the mounting column to rotate and ascend and descend at the same time, a limiting mechanism for limiting rotation of a formed product is arranged on the lower mold or the upper mold, and the threaded section of the bolt is integrally formed through the forming cavity in the lower mold. Therefore, the probability that protruding strips appear on the two sides after the threaded section is formed is reduced, meanwhile, the dislocation situation of the threaded section can be reduced, the probability that defective products appear after the bolt is formed is reduced, and the bolt forming efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of bolt processing, and in particular to a bolt integral forming and demolding mold. Background Technology

[0002] Most forming molds consist of an upper mold and a lower mold. The upper mold is the moving mold and is mostly used to form the head of the bolt. The lower mold is used to form the threaded section of the bolt. The lower mold is generally composed of two sliders, each with a half-axial section of the threaded section cavity. The two sliders can be close to or far apart. When the two sliders are close to each other and fit together, a complete threaded section cavity is formed.

[0003] The specific structure of the existing lower mold can be referred to the hot pressing forming device for bolt processing disclosed in Chinese Patent No. CN217529090U, which includes a base plate, a lower base platform installed at the upper end of the base plate, a lower mold base including a first moving mold base and a second moving mold base, and demolding electric cylinders are provided on both sides of the lower base. The two demolding electric cylinders drive the first moving mold base and the second moving mold base to move closer to each other or further away from each other. A forming cavity is provided on the upper mold base and the lower mold base respectively.

[0004] Since the threaded section is formed by the merging of two moving mold bases (sliders), the precision requirements are very high. Errors in cavity alignment or gaps when the moving mold bases are in contact will lead to quality problems in the formed threaded section. The former will cause thread misalignment, and the latter will cause protrusions at the thread splice. The former will cause the thread to be scrapped, and the latter will require an additional polishing process. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies, such as errors in cavity alignment or gaps during the fitting of the moving mold base, which affect the quality of the formed bolts, making the formed bolts prone to defects or requiring additional polishing processes. It provides a bolt integral forming and demolding mold.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0007] A bolt integral molding and demolding mold includes an upper mold and a lower mold. A molding structure for molding the bolt thread segment is provided in the lower mold. The molding structure includes a mounting post with a thread segment molding cavity provided on the lower mold and a demolding drive module provided on the lower mold to drive the mounting post to rotate and rise. A limiting mechanism is provided on the lower mold or the upper mold to restrict the rotation of the product after molding.

[0008] Using the above scheme, the threaded section forming cavity set in the mounting column can form the threaded section of the bolt. After the bolt is formed, the mounting column can be driven to rotate and descend by the set demolding drive module. Because there are restrictions on the rotation of the product in the threaded section forming cavity in the lower or upper mold, when the mounting column rotates and descends, the bolt in the threaded section forming cavity will gradually be exposed from the threaded section forming cavity due to the descent of the mounting column, thereby realizing the demolding of the bolt. The threaded section of the bolt is integrally formed by the forming cavity in the lower mold, thereby reducing the probability of bulges appearing on both sides of the threaded section after forming. At the same time, it can also reduce the occurrence of misalignment of the threaded section, thereby reducing the probability of defective bolts after forming and improving the efficiency of bolt forming.

[0009] Preferably, the mounting columns are arranged in several groups at horizontal parallel intervals, and the demolding drive module can synchronously drive all the mounting columns to rotate and rise synchronously.

[0010] By adopting the above scheme, several sets of mounting columns are set horizontally at intervals on the lower mold, and the demolding drive module can simultaneously drive several mounting columns to rise and fall, so that the demolding mold can form multiple bolts at the same time, thereby improving the efficiency of bolt production.

[0011] Preferably, the demolding drive module includes a driven gear coaxially fixed to the outside of the mounting column, a horizontally arranged rack, and a gear set that meshes with the rack and the driven gear respectively. The gear set includes at least a toothed bar that meshes with the driven gear and allows the driven gear to slide vertically. The horizontal reciprocating movement of the rack is controlled by a telescopic drive member, and the mounting column is vertically guided to rise and fall on the lower mold.

[0012] Using the above scheme, the telescopic drive component can drive the rack to move horizontally within the lower mold. When the rack moves, it will drive the gear bar to rotate through the gear set. Since the gear bar meshes with the driven gear, when the gear bar rotates, it will drive the driven gear to rotate, and the driven gear will drive the mounting column to rotate. Since the rotation of the bolt in the molding cavity is limited by the limiting mechanism, when the gear bar rotates, it will drive the mounting column to rotate and rise within the lower mold, thereby causing the bolt in the molding cavity to gradually come out of the molding cavity.

[0013] Preferably, the lower mold is provided with a support structure that rises and falls with the extension and retraction of the telescopic drive component, thereby supporting the mounting column.

[0014] Preferably, the support structure includes a support platform disposed below the mounting column inside the lower mold, the telescopic end of the telescopic drive is connected to a moving plate that moves horizontally on the lower mold, one end of the rack is fixed to the moving plate, the support platform slides vertically on the moving plate, the bottom of the support platform is configured as a first inclined surface that slopes downward toward one end of the telescopic drive, the lower mold has a guide groove recessed therefor the support platform to move horizontally, and the bottom of the guide groove is configured as a second inclined surface that fits against the first inclined surface.

[0015] Using the above scheme, the movable plate can drive the rack to move horizontally within the lower mold. At the same time, the movable plate will also drive the support platform to move. Because of the first inclined surface below the support platform and the second inclined surface recessed within the lower mold, the support platform will tilt downward or upward when the movable plate drives the support platform to move, thereby providing support for the installation column when it is raised or lowered.

[0016] Preferably, the lower mold has a forming cavity for forming the entire bolt, with the bolt head facing downwards and the head diameter being smaller than the outer diameter of the stud. The upper mold is used to close the entire forming cavity and for the bolt to be ejected. The limiting mechanism is partially inserted into the bottom of the forming cavity and is used to form the bolt head drive groove.

[0017] Preferably, the limiting mechanism includes a forming rod with the same shape as the head drive groove of the bolt. The lower end of the forming rod is fixed on the lower mold and the upper end is inserted into the forming cavity from the bottom of the mounting post. When the mounting post rises to its maximum stroke, the height of the forming rod in the forming cavity is the groove depth of the head drive groove.

[0018] Using the above scheme, the forming rod set in the forming cavity can restrict the bolt formed in the forming cavity from rotating with the rotation of the mounting column, so that the mounting column can rotate and rise in the lower mold to realize the demolding of the bolt. At the same time, the forming rod is installed in the lower mold, so that when the bolt is demolded, the forming rod can fix the bolt on the forming rod, thereby facilitating the subsequent removal of the bolt from the demolding mold.

[0019] This utility model, by adopting the above technical solution, has significant technical effects: the threaded section forming cavity set in the mounting column can form the threaded section of the bolt. After the bolt is formed, the mounting column can be driven to rotate and descend by the set demolding drive module. Because the lower or upper mold is set with a restriction on the product to rotate in the threaded section forming cavity, when the mounting column rotates and descends, the bolt in the threaded section forming cavity will gradually be exposed from the threaded section forming cavity due to the descent of the mounting column, thereby realizing the demolding of the bolt. The threaded section of the bolt is integrally formed by the forming cavity in the lower mold, thereby reducing the probability of bulges appearing on both sides of the threaded section after forming, and also reducing the occurrence of misalignment of the threaded section, thereby reducing the probability of defective bolts after forming and improving the efficiency of bolt forming. Attached Figure Description

[0020] Figure 1 This is an isometric view of a bolt integral molding and demolding mold in this embodiment;

[0021] Figure 2 This is an isometric view of the lower mold and the forming structure in this embodiment;

[0022] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 This is an isometric view of the lower mold and the demolding drive module in this embodiment;

[0024] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0025] Figure 6 This is an isometric view of the support platform in this embodiment;

[0026] Figure 7 This is an isometric view of the lower mold in this embodiment.

[0027] The parts referred to by the numbers in the above attached figures are as follows: 1. Lower mold; 2. Mounting column; 3. Molding cavity; 4. Rack; 5. Driven gear; 6. Hydraulic cylinder; 7. First gear; 8. Second gear; 9. Gear bar; 10. Moving plate; 11. Support platform; 12. Guide groove; 1301. First inclined surface; 1302. Second inclined surface; 14. Molding rod; 15. Upper mold; 16. Clearance groove. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Example

[0029] A bolt integral molding and demolding mold, reference Figures 1-3 It includes an upper mold 15 and a lower mold 1. The lower mold 1 is provided with a forming structure for forming the threaded section of the bolt. The forming structure includes a mounting post 2 with a threaded section forming cavity provided on the lower mold 1 and a demolding drive module provided on the lower mold 1 to drive the mounting post 2 to rotate and rise. A limiting mechanism is provided on the lower mold 1 or the upper mold 15 to restrict the rotation of the formed product.

[0030] refer to Figures 2-5 The mounting columns 2 are arranged in several groups at horizontal parallel intervals. The demolding drive module can synchronously drive all the mounting columns 2 to rotate and rise synchronously. The demolding drive module includes a driven gear 5 coaxially fixed outside the mounting column 2, a horizontally arranged rack 4, and a gear set that meshes with the rack 4 and the driven gear 5 respectively. The gear set includes at least a toothed bar 9 that meshes with the driven gear 5 and allows the driven gear 5 to slide vertically. The horizontal reciprocating movement of the rack 4 is controlled by a telescopic drive component. In this embodiment, the telescopic drive component is a hydraulic cylinder 6. The mounting columns 2 are vertically guided to rise and fall on the lower mold 1. In this embodiment, the gear set also includes a first gear 7 that meshes with the rack 4 and a second gear 8 that is coaxially arranged with the first gear 7 and meshes with the toothed bar 9.

[0031] refer to Figure 4 , Figures 6-7A support structure is provided on the lower mold 1 to support the mounting column 2 by raising and lowering it with the extension and retraction of the telescopic drive component. The support structure includes a support platform 11 provided in the lower mold 1 below the mounting column 2. The telescopic end of the telescopic drive component is connected to a moving plate 10 that moves horizontally on the lower mold 1. One end of the rack 4 is fixed on the moving plate 10. The support platform 11 slides vertically on the moving plate 10. The bottom of the support platform 11 is provided as a first inclined surface 1301 that slopes downward toward one end of the telescopic drive component. The lower mold 1 has a guide groove 12 that allows the support platform 11 to move horizontally. The bottom of the guide groove 12 is provided as a second inclined surface 1302 that fits against the first inclined surface 1301.

[0032] refer to Figures 1-3 The lower mold 1 has a forming cavity 3 for forming the entire bolt. The head of the bolt faces downward and the head diameter is smaller than the outer diameter of the stud. The upper mold 15 is used to close the entire forming cavity 3 and for the bolt to be removed. A limiting mechanism is partially inserted into the bottom of the forming cavity 3 and is used to form the head drive groove of the bolt. The limiting mechanism includes a forming rod 14 with the same shape as the head drive groove of the bolt. The lower end of the forming rod 14 is fixed on the lower mold 1 and the upper end is inserted into the forming cavity 3 from the bottom of the mounting post 2. When the mounting post 2 rises to the maximum stroke, the height of the forming rod 14 in the forming cavity 3 is the groove depth of the head drive groove. In this embodiment, the support platform 11 is provided with a clearance groove 16 for the forming rod 14 to avoid when the moving plate 10 drives the support platform 11 to move.

[0033] Bolt demolding process: After the bolt is formed in the molding cavity 3 inside the mounting column 2, the hydraulic cylinder 6 is activated, causing the moving plate 10 to move. When the moving plate 10 moves, it will drive the rack 4 to move horizontally. At this time, the rack 4 will drive the first gear 7 to rotate. When the first gear 7 rotates, it will drive the second gear 8, which is coaxial with it, to rotate. When the second gear 8 rotates, it will drive the gear bar 9, which meshes with it, to rotate. The gear bar 9 will drive the driven gear 5 to rotate. When the driven gear 5 rotates, it will drive the mounting column 2 to rotate. Because the molding rod 14 installed inside the mounting column 2 restricts the bolt in the molding cavity 3 from rotating with the mounting column 2, when the gear bar 9 drives the driven gear 5 to rotate, the mounting column 2 will rotate and descend. At this time, the bolt in the molding cavity 3 will gradually be dislodged from the molding cavity 3.

[0034] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A die for integrally forming and stripping a bolt, comprising an upper die (15) and a lower die (1), a forming structure for forming a threaded section of the bolt being provided in the lower die (1), characterized in that: The forming structure comprises a mounting column (2) with a threaded section forming cavity arranged on a lower die (1) and a demolding driving module arranged on the lower die (1) for driving the mounting column (2) to rotate and lift, and a limiting mechanism arranged on the lower die (1) or an upper die (15) for limiting rotation of a formed product.

2. The integrated bolt and demolding mold of claim 1, wherein: The mounting columns (2) are arranged in several groups horizontally and in parallel, and the demolding driving module can synchronously drive all the mounting columns (2) to rotate and lift synchronously.

3. The integrated bolt and demolding mold of claim 2, wherein: The demolding driving module comprises a driven gear (5) coaxially fixed outside the mounting column (2), a rack (4) arranged horizontally, and a gear set meshing with the rack (4) and the driven gear (5), wherein the gear set at least comprises a tooth bar (9) meshing with the driven gear (5) and allowing the driven gear (5) in rotation to vertically slide, the horizontal reciprocating movement of the rack (4) is controlled by a telescopic driving member, and the mounting column (2) vertically guides and lifts on the lower die (1).

4. The integrated bolt and demolding mold of claim 3, wherein: A supporting structure is arranged on the lower die (1) for lifting and supporting the mounting column (2) along with the telescopic movement of the telescopic driving member.

5. The integrated bolt and demolding mold of claim 4, wherein: The supporting structure comprises a supporting table (11) arranged below the mounting column (2) in the lower die (1), a moving plate (10) connected to a telescopic end of the telescopic driving member and horizontally guided and moved on the lower die (1), one end of the rack (4) is fixed on the moving plate (10), the supporting table (11) vertically guides and slides on the moving plate (10), the bottom of the supporting table (11) is arranged as a first inclined surface (1301) downwardly inclined to the one end of the telescopic driving member, the lower die (1) is recessed with a guide groove (12) for horizontally guiding and moving the supporting table (11), and the bottom of the guide groove (12) is arranged as a second inclined surface (1302) abutting the first inclined surface (1301).

6. The integrated bolt and demolding mold of claim 5, wherein: The lower die (1) has a forming cavity (3) for forming a whole bolt, the head of the bolt faces downward and the diameter of the head is smaller than the outer diameter of the shank, the upper die (15) is used for closing the whole forming cavity (3) and for the bolt to be demolded, and the limiting mechanism is partially inserted into the bottom of the forming cavity (3) and is used for a head driving groove of the formed bolt.

7. The integrated bolt and demolding mold of claim 6, wherein: The limiting mechanism comprises a forming rod (14) consistent in shape with the head driving groove of the bolt, the lower end of the forming rod (14) is fixed on the lower die (1) and the upper end is inserted into the forming cavity (3) from the bottom of the mounting column (2), when the mounting column (2) is lifted to the maximum stroke, the height of the forming rod (14) in the forming cavity (3) is the groove depth of the head driving groove.

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