Mold last bottom locking device and mold last tray
By using a locking device at the bottom of the mold, and utilizing the radial movement of the ball bearings and the control of a double piston rod cylinder, the problem of securely clamping and easily separating the mold from the tray is solved, ensuring the quality of shoe and boot processing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIHUA 3515 LEATHER & SHOES
- Filing Date
- 2025-04-24
- Publication Date
- 2026-05-05
AI Technical Summary
During the shoe manufacturing process, the mold last is difficult to securely hold on the tray, while it is also easy to separate, which affects the quality of the shoes and boots.
Design a locking device for the bottom of a mold last, which uses the radial movement of the ball bearings to lock and unlock the mold last and the tray. Through the cooperation of the locking pin, push rod, ball bearing cavity and compression spring, the position of the ball bearings is controlled by a double piston rod cylinder to fix and loosen the mold last.
It achieves a secure locking and easy unlocking of the mold and the tray, meeting the operational needs of the assembly line and ensuring the quality of shoes and boots.
Smart Images
Figure CN224193023U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of footwear processing, specifically relating to a locking device for the bottom of a mold last. Background Technology
[0002] During the shoe manufacturing process, after the shoe is fitted into the mold, it needs to be roughened and glued with precise trajectory. In some processes, the mold is fixed on a tray, and the production line needs a robotic arm to grab the tray together. At this time, the mold on the production line must be clamped on the tray to prevent it from shaking back and forth, otherwise it will affect the quality of the shoes.
[0003] It is difficult to secure the mold to the tray while also making it easy to separate the two. Utility Model Content
[0004] The technical problem to be solved by this utility model is: how to design a locking device at the bottom of the mold last so that the mold last can be easily locked onto the tray, and at the same time, the two can be easily separated.
[0005] The specific technical solution of this utility model is as follows:
[0006] A locking device for the bottom of a mold last includes a locking pin with a hollow portion and an outlet at the bottom of the hollow portion, allowing the hollow portion to communicate with the outside. A push rod is slidably mounted inside the hollow portion, with a push handle fixed at the lower end of the push rod, extending from the outlet to the outside. The locking pin has a ball bearing cavity that connects the hollow portion to the outside, and a ball bearing is located inside the ball bearing cavity. The outer surface of the push rod has a recessed area that corresponds to the ball bearing cavity, causing the inner end of the ball bearing to contact the recessed area. A compression spring is located inside the hollow portion between the upper surfaces of the locking pin and the push rod.
[0007] The area above the deepest point of the depression is called the upper depression, and the area below the deepest point of the depression is called the lower depression. The upper depression is a gentle slope, and the lower depression is a steep slope.
[0008] The outer surface of the lower end of the locking pin is provided with a threaded area.
[0009] A blocking ring is fixed to the inner surface of the lower end of the locking pin. The inside of the blocking ring is the outlet. The connection between the push rod and the push handle is a stepped surface. Through the cooperation of the stepped surface and the blocking ring, the push rod can be prevented from sliding out of the hollow part.
[0010] The recessed area is a contour that matches the ball bearing cavity.
[0011] The upper end of the locking pin is tapered.
[0012] The ball bearing cavity is located on a horizontal plane in a space.
[0013] A mold last tray includes a mold last and a tray. Two locking devices for the bottom of the mold last are fixed on the tray. A double-piston rod cylinder is fixed below the tray. The two piston rods of the double-piston rod cylinder are respectively aligned with the push handles of the two locking devices at the bottom of the mold last. The mold last is provided with two insertion holes, and an upper locking sleeve and a lower locking sleeve are provided in the insertion holes. The locking pin of the locking device at the bottom of the mold last extends into the insertion hole of the mold last, wherein the conical surface reaches the upper locking sleeve of the mold last, and the ball is located in the gap between the upper locking sleeve and the lower locking sleeve.
[0014] The width of the gap between the upper and lower locking sleeves where the ball is located is smaller than the diameter of the ball.
[0015] Compared with the prior art, the technical effect of this utility model is that it has a ring of rolling balls, and the radial movement of the rolling balls is used to lock and unlock the mold and the tray, which can meet the needs of the production line. Attached Figure Description
[0016] Figure 1 This is a schematic diagram (a) of the present invention.
[0017] Figure 2 This is a schematic diagram (II) of the present invention.
[0018] Figure 3 This is a schematic diagram of the cross-section of the locking pin.
[0019] Figure 4 This is a schematic diagram of the utility model in use. Detailed Implementation
[0020] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0021] like Figure 1-2 A locking device for the bottom of a mold last includes a locking post 10, the locking post 10 having a hollow part 11, and an outlet 12 below the hollow part 11, the outlet 12 allowing the hollow part 11 to communicate with the outside.
[0022] A push rod 21 is slidably provided inside the hollow part 11. The lower end of the push rod 21 is fixed with a push handle 22, which extends from the outlet 12 to the outside.
[0023] The locking pin 10 is provided with a ring of ball cavity 13, which connects the hollow part 11 with the outside. Each ball cavity 13 contains a ball 30. The outer surface of the push rod 21 is provided with a ring of recessed area 23, which corresponds to the ball cavity 13, so that the inner end of the ball 30 contacts the recessed area 23.
[0024] A compression spring 29 is provided inside the hollow part 11, and the compression spring 29 is located between the upper surface of the locking pin 10 and the push rod 21.
[0025] For ease of locking, the area above the deepest part of the depression 23 is called the upper depression 231, and the area below the deepest part of the depression 23 is called the lower depression 232. The upper depression 231 is a gentle slope, and the lower depression 232 is a steep slope.
[0026] To facilitate securing it to the tray, the outer surface of the lower end of the locking pin 10 is provided with a threaded area 26.
[0027] To prevent the push rod 21 from sliding out of the hollow part 11, a blocking ring 14 is fixed to the inner surface of the lower end of the locking pin 10. The inside of the blocking ring 14 is the outlet 12. The connection between the push rod 21 and the push handle 22 is a stepped surface 24. Through the cooperation between the stepped surface 24 and the blocking ring 14, the push rod 21 can be prevented from sliding out of the hollow part 11.
[0028] For ease of positioning, the recessed area 232 has a contour that matches the ball bearing cavity 13.
[0029] To facilitate entry into the mold, the upper end of the locking pin 10 is a conical surface 15.
[0030] like Figure 3 For ease of control, the ball bearing cavity 13 is located on a horizontal plane in space.
[0031] like Figure 4 A mold tray includes a mold 91 and a tray 92. Two locking devices 90 at the bottom of the mold are fixed on the tray 92. A double piston rod cylinder 96 is fixed below the tray 92. The two piston rods 98 of the double piston rod cylinder 96 are respectively aligned with the push handles 22 of the locking devices 90 at the bottom of the two molds.
[0032] The mold 91 has two insertion holes, and an upper locking sleeve 93 and a lower locking sleeve 94 are provided in the insertion holes. The locking pin 10 of the locking device 90 at the bottom of the mold extends into the insertion hole of the mold 91. The conical surface 15 reaches the upper locking sleeve 93 of the mold 91. The ball 30 is located in the gap between the upper locking sleeve 93 and the lower locking sleeve 94. The width of the gap is smaller than the diameter of the ball 30.
[0033] Its working principle is as follows:
[0034] S1. Installation: Fix the locking devices 90 at the bottom of the two molds to the tray 92, wherein the locking can be detachably fixed through the threaded area 26.
[0035] S2. Inserting the die: After the pallet is in place on the production line, activate the double piston rod cylinder 96 to extend the piston rod 98, causing the push handle 22 and push rod 21 to move upwards, so that the inner end of the ball 30 "contacts the deepest part of the recessed area 23" or "is located in the lower recessed area 232 that matches the contour of the ball cavity 13". See [link / reference] Figure 2The ball on the right side of the ball, ball 30, gradually moves inward. At this time, the outline formed by the outer ends of all ball cavities 13 is the smallest. Now, insert the mold 91 into the locking pin 10, and the mold can be inserted without obstruction.
[0036] S3. Fixing the mold: After the mold is inserted into place (that is, the gap between the upper locking sleeve 93 and the lower locking sleeve 94 is aligned with the ball cavity 13), the double piston rod cylinder 96 loses pressure, the piston rod 98 retracts, and under the push of the compression spring 29, it moves downward with the push rod 21. The upper recessed area 231 gradually presses the ball 30 outward, and finally stops at the gap between the upper locking sleeve 93 and the lower locking sleeve 94. In this way, the ball 30 is like an expansion band, locking the upper locking sleeve 93 and the lower locking sleeve 94, and thus locking the mold 91.
[0037] In this step, if the "upper concave area 231 is a gentle slope", the ball bearing 30 is similar to climbing a gentle slope, which is more convenient.
[0038] S4, track roughening, glue application, and other operations. This is existing technology and will not be described in detail.
[0039] S5. Release the mold last: After all processes on the production line (such as roughening the track, applying glue, etc.) are completed, start the double piston rod cylinder 96 to extend the piston rod 98, causing the push handle 22 and push rod 21 to move upwards, so that the inner end of the ball 30 "contacts the deepest part of the recessed area 23" or "is located in the lower recessed area 232 that matches the contour of the ball cavity 13". See [link / reference] Figure 2 The ball on the right side of the ball 30 gradually moves inward. At this time, the contour formed by the outer ends of all ball cavities 13 is the smallest, and the mold 91 loses its constraint.
[0040] S6. Take away the mold: Once the mold 91 is no longer constrained, it can be easily taken away.
[0041] Homework completed.
[0042] For other details, please refer to the existing technology.
[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that those skilled in the art can make several changes and improvements without departing from the overall concept of the present utility model, and these should also be considered within the protection scope of the present utility model.
Claims
1. A locking device for the bottom of a mold last, comprising a locking pin (10), characterized in that: The locking pin (10) has a hollow part (11), and an outlet (12) is provided below the hollow part (11), which allows the hollow part (11) to communicate with the outside. A push rod (21) is slidably provided inside the hollow part (11), and a push handle (22) is fixed at the lower end of the push rod (21). The push handle (22) extends from the outlet (12) to the outside. The locking pin (10) is provided with a ball cavity (13), which connects the hollow part (11) with the outside. A ball (30) is provided inside the ball cavity (13). The outer surface of the push rod (21) is provided with a recessed area (23), which corresponds to the ball cavity (13) so that the inner end of the ball (30) contacts the recessed area (23). A compression spring (29) is provided inside the hollow part (11), and the compression spring (29) is located between the upper surface of the locking pin (10) and the push rod (21).
2. The locking device for the bottom of the mold as described in claim 1, characterized in that: The area above the deepest part of the depression (23) is the upper depression (231), and the area below the deepest part of the depression (23) is the lower depression (232). The upper depression (231) is a gentle slope, and the lower depression (232) is a steep slope.
3. The locking device at the bottom of the mold as described in claim 2, characterized in that: The lower end of the locking pin (10) has a threaded area (26) on its outer surface.
4. The locking device for the bottom of the mold as described in claim 3, characterized in that: A blocking ring (14) is fixed on the inner surface of the lower end of the locking pin (10). The inside of the blocking ring (14) is the outlet (12). The connection between the push rod (21) and the push handle (22) is a stepped surface (24). Through the cooperation between the stepped surface (24) and the blocking ring (14), the push rod (21) can be prevented from sliding out of the hollow part (11).
5. The locking device for the bottom of the mold as described in claim 4, characterized in that: The recessed area (232) is a contour that matches the ball cavity (13).
6. The locking device for the bottom of the mold as described in claim 5, characterized in that: The upper end of the locking pin (10) is a conical surface (15).
7. The locking device for the bottom of the mold as described in claim 6, characterized in that: The ball bearing cavity (13) is located on a horizontal plane in a space.
8. A molded last tray, comprising a mold (91) and a tray (92), characterized in that: Two locking devices (90) for the bottom of the mold as described in claim 6 are fixed on the tray (92). A double piston rod cylinder (96) is fixed below the tray (92). The two piston rods (98) of the double piston rod cylinder (96) are respectively aligned with the push handles (22) of the two locking devices (90) for the bottom of the mold. Two insertion holes are provided on the mold (91). An upper locking sleeve (93) and a lower locking sleeve (94) are provided in the insertion holes. The locking pin (10) of the locking device (90) for the bottom of the mold extends into the insertion hole of the mold (91). The conical surface (15) reaches the upper locking sleeve (93) of the mold (91). The ball (30) is located in the gap between the upper locking sleeve (93) and the lower locking sleeve (94).
9. The mold tray as described in claim 8, characterized in that: The width of the gap between the upper locking sleeve (93) and the lower locking sleeve (94) where the ball (30) is located is smaller than the diameter of the ball (30).