High-rigidity sleeve forming lower die
By using high-rigidity pads and push tube structures in the sleeve forming lower mold, the problem of insufficient rigidity of traditional molds is solved, realizing a high-rigidity sleeve forming lower mold, which is suitable for producing extended products and saves materials.
Patent Information
- Application Number
- CN202520738596.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-04-18
AI Technical Summary
The lower die structure of traditional sleeve forming dies needs to be adapted to the product demolding stroke, resulting in a longer punch and die shell length, and a decrease in the overall rigidity of the die.
The high-rigidity pad and push tube structure is adopted. The length of the punch is shortened by the cooperation of the pin and the slot, and the tungsten steel pad is used to improve the rigidity of the mold. The push tube and the punch are molded together.
It improves the rigidity of the lower die for sleeve forming, saves materials, enables the production of extended products, and can be used with ordinary equipment.
Smart Images
Figure CN223862651U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an improved invention of fastener forming mold, and more particularly to an improved invention of a high-rigidity sleeve forming lower mold. Background Technology
[0002] See appendix Figure 3 Traditional sleeve forming molds include an upper mold and a lower mold. The lower mold includes a mold shell a1 and a middle sleeve a2, a middle sleeve core a3, a punch a4, a push tube a5, a pad block a6, and a three-pin a7 disposed within the mold shell a1. During demolding, the three-pin a7 drives the push tube a5 to move upward, and then the push tube a5 moves upward along the punch a4 to demold the product a8 on the punch a4. In order to adapt to the demolding stroke of the product, the punch a4 and the mold shell a1 are relatively long in this traditional lower mold structure, and the overall rigidity of the mold is reduced. Utility Model Content
[0003] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a high-rigidity sleeve forming lower mold.
[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: A high-rigidity sleeve forming lower mold includes a mold shell and a punch. The upper end of the mold shell is equipped with a forming mold piece, and the middle part of the mold shell has an inner and outer arranged middle sleeve core and middle sleeve. The lower part of the mold shell is provided with a pad block, which has a central hole communicating with the middle sleeve core. The lower end of the pad block is provided with a locking nut for limiting the fit, and the locking nut is threaded to the bottom of the mold shell. The punch is disposed inside the middle sleeve core, and a push tube is slidably sleeved on the outside of the punch block. The lower end of the punch extends into the central hole of the pad block. A horizontally arranged pin is provided on the corresponding pad block, which passes through and positions the lower end of the punch. The push tube passes through the central hole of the pad block, and an axially arranged slot is provided on the push tube, which avoids the pin. The length of the push tube extending out of the pad block and the length of the slot are both adapted to the sleeve demolding stroke.
[0005] The lower end of the push tube is the outer diameter-increasing end, and the lower end of the center hole of the pad is the inner diameter-increasing end. The lower end of the push tube and the lower end of the center hole are respectively matched for limiting.
[0006] The pad is made of tungsten steel.
[0007] The beneficial effects of this utility model are that the improved high-rigidity sleeve forming lower die innovatively changes the punch fixing method and cooperates with the slotted push tube for demolding, enabling ordinary equipment to produce extended products, specifically sleeve products. When the product length is the same, compared with the traditional lower die, the punch and mold shell can be made shorter, saving materials and improving the rigidity of the die. Attached Figure Description
[0008] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.
[0009] Figure 1 This is a schematic diagram of the structure of this utility model.
[0010] Figure 2 This is a diagram showing the fit between the upper and lower molds of this utility model.
[0011] Figure 3 This is a schematic diagram of a traditional sleeve forming mold in the background technology of this utility model. Detailed Implementation
[0012] The accompanying drawings illustrate the structure of this utility model, and further details will be described below with reference to the drawings. In this embodiment, see the attached drawings. Figure 1-2 The high-rigidity sleeve forming lower die includes a die shell 1 and a punch 2. A forming die plate 3 is fitted at the upper end of the die shell 1, and the forming die plate 3 is adapted to be stamped at the end of the sleeve 4. A middle sleeve core 5 and a middle sleeve 6 are arranged internally and externally in the middle of the die shell 1. A pad block 7 is provided at the lower part of the die shell 1, and the pad block 7 has a central hole communicating with the middle sleeve core 5. A locking nut 8 with a limiting fit is provided at the lower end of the pad block 7, and the locking nut 8 is threaded to the bottom of the die shell 1. The punch 2 is positioned on the middle sleeve... Inside the core 5, and outside the punch 2, a push tube 9 is slidably sleeved. The lower end of the punch 2 extends into the center hole of the pad 7. The corresponding pad 7 is provided with a horizontally arranged pin 10. The pin 10 passes through and positions the lower end of the punch 2. The push tube 9 passes through the center hole of the pad 7, and the push tube 9 is provided with an axially arranged slot 11. The slot 11 and the pin 10 are mutually abutting. The length of the push tube 9 extending out of the pad 7 and the length of the slot 11 are both adapted to the demolding stroke of the sleeve 4.
[0013] In this invention, the lower end of the punch 2 is fixed to the pad block 7 with a pin 10, which shortens the length of the punch 2. The push tube 9, which is engaged with the punch 2 for demolding, is slotted 11. The slot 11 avoids the pin 10, ensuring the driving engagement between the push tube 9 and the punch 2. The lengths of the punch 2 and the mold shell 1 can be shortened, saving materials and improving the rigidity of the mold.
[0014] As a further improved specific implementation, the lower end of the push tube 9 is the outer diameter increased end 12, and the lower end of the center hole of the pad block 7 is the inner diameter increased end 13. The lower end of the push tube 9 and the lower end of the center hole are respectively limited to each other, which plays a limiting role in the upward movement of the push tube 9.
[0015] As a further improved specific implementation, the pad 7 is made of tungsten steel, which has high hardness, wear resistance, and good strength and toughness.
[0016] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.
Claims
1. A high-rigidity sleeve forming lower die, comprising a die shell and a punch, wherein a forming die piece is provided at the upper end of the die shell, and a middle sleeve core and a middle sleeve arranged internally and externally are provided in the middle of the die shell, characterized in that: The lower part of the mold shell is provided with a pad block, and the pad block has a central hole communicating with the middle sleeve core. The lower end of the pad block is provided with a locking nut for limiting the fit. The locking nut is threaded to the bottom of the mold shell. The punch is set inside the middle sleeve core, and a push tube is slidably sleeved on the outside of the punch. The lower end of the punch extends into the central hole of the pad block. The corresponding pad block is provided with a horizontally arranged pin. The pin passes through and positions the lower end of the punch. The push tube passes through the central hole of the pad block, and the push tube is provided with an axially arranged slot. The slot avoids the pin. The length of the push tube extending out of the pad block and the length of the slot are both adapted to the demolding stroke of the sleeve.
2. The high-rigidity sleeve forming lower die as described in claim 1, characterized in that: The lower end of the push tube is the outer diameter-increasing end, and the lower end of the center hole of the pad is the inner diameter-increasing end. The lower end of the push tube and the lower end of the center hole are respectively matched for limiting.
3. The high-rigidity sleeve forming lower die as described in claim 1, characterized in that: The pad is made of tungsten steel.