An embedded dowel pin structure for optical electroformed mold inserts

Abstract

This utility model discloses an embedded positioning pin structure for an optical electroforming mold insert, relating to the field of electroforming mold technology. It includes: a mold body with a mounting groove on its top, into which an insert base is embedded; multiple positioning pin assemblies disposed between the bottom of the insert base and the bottom inner wall of the mounting groove; and a positioning assembly disposed on the mold body for fixing the positioning pin assemblies. This utility model restricts the position of the pins, effectively preventing displacement of the insert due to external forces during electroforming, meeting the stringent positioning requirements of high-precision optical product manufacturing. Furthermore, during removal, the elastic element's resetting action pushes the insert out of the mounting groove, achieving rapid insert removal.

Description

Technical Field

[0001] This utility model relates to the field of electroforming mold technology, and in particular to an embedded positioning pin structure for an optical electroforming mold insert. Background Technology

[0002] Optical electroforming molds are special molds used for the precision manufacturing of optical components. Their core principle is to utilize electroforming (through electrolysis, metal ions are deposited on the surface of a cathode mold to form a specific shape) to create mold cavities with high-precision optical surfaces (such as mirrors, microstructures, etc.). These molds are typically used to produce optical parts with extremely high requirements, such as optical lenses, gratings, and waveguide devices.

[0003] Currently, in the production process of optical electroforming molds, the accurate positioning of mold inserts is crucial. Existing mold insert positioning methods have certain shortcomings, such as limited positioning performance. When positioning the inserts in the mold, they simply use the cooperation of positioning holes and positioning pins to achieve positioning, which is insufficient to meet the production requirements of high-precision optical products. During the electroforming process, they are prone to displacement due to external forces, affecting product quality. Therefore, it is urgent to design an embedded positioning pin structure for optical electroforming mold inserts to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing an embedded positioning pin structure for optical electroforming mold inserts. Its advantages lie in restricting the position of the pin, effectively preventing displacement of the insert due to external forces during the electroforming process, and meeting the stringent positioning requirements of high-precision optical product manufacturing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An embedded positioning pin structure for an optical electroforming mold insert includes:

[0007] The mold body has an installation groove on its top, and an insert base is embedded in the installation groove;

[0008] Multiple locating pin assemblies are disposed between the bottom of the insert base and the bottom inner wall of the mounting groove;

[0009] A positioning component is disposed on the mold body and is used to fix the positioning pin component.

[0010] The above technical solutions can reinforce the pin, effectively preventing the insert from shifting due to external forces during the electroforming process, thus meeting the stringent positioning requirements of high-precision optical product manufacturing.

[0011] The present invention is further configured such that the positioning pin assembly includes a connecting hole opened in the inner wall of the bottom of the mounting groove, and a positioning hole is opened at the bottom of the connecting hole. The diameter of the positioning hole is smaller than the diameter of the connecting hole. A fixing seat that fits against the inner wall of the connecting hole is installed at the bottom of the insert base, and a pin inserted into the positioning hole is fixed at the middle of the bottom of the fixing seat. An elastic element inserted into the connecting hole is provided at the bottom of the fixing seat.

[0012] The above technical solution achieves precise docking between the insert base and the mold body through the cooperation of the fixing seat, pin, connecting hole and positioning hole.

[0013] The present invention is further configured such that a screw rod is fixed at the top center of each of the fixed bases, and a screw groove for screwing the screw rod is provided at the bottom of the insert base.

[0014] The above technical solutions facilitate the disassembly and assembly of the entire positioning pin assembly.

[0015] The present invention is further configured such that the elastic element includes a movable ring sleeved on the outer wall of the pin, and the movable ring is fitted against the bottom inner wall of the connecting hole, and a spring is fixedly installed on the top of the movable ring and the bottom of the fixed seat.

[0016] The above technical solution allows the insert base to be pushed out of the mounting groove, achieving the effect of quick removal of the insert.

[0017] The present invention is further configured such that the positioning component includes slots on both sides of the bottom of one end of the mold body, and the slots are connected to the positioning holes. The same U-shaped plate is inserted into the two slots. The U-shaped plate has multiple openings for pins to pass through. A displacement component for adjusting the position of the U-shaped plate is provided on one side of the mold body. One end of each opening is provided with an outer slot, and one side of each pin is provided with an inner slot. The inner slots engage with the outer slots.

[0018] The present invention is further configured such that the displacement component includes a threaded rod rotatably connected to one end of the mold body, and a threaded hole for threading the threaded rod is provided at the middle of one end of the U-shaped plate. A knob is fixed at one end of the threaded rod, and a reinforcing nut for reinforcing the U-shaped plate is also threaded onto the outer wall of the threaded rod.

[0019] The above technical solutions facilitate the adjustment of the U-shaped plate position, enabling the reinforcement and disassembly of the pin.

[0020] The present invention is further configured such that two guide holes are provided at one end of the mold body, and a guide rod inserted into the guide hole is fixed on the inner wall of one end of the U-shaped plate.

[0021] The above technical solutions ensure the stable guiding performance of the U-shaped plate.

[0022] The present invention is further configured such that the outer wall of the pin is provided with buffer slots distributed at equal intervals, and the inner wall of the positioning hole is fixed with buffer rings inserted at equal intervals into the buffer slots. The cross sections of the buffer rings and the buffer slots are both designed to be triangular.

[0023] The above technical solutions aim to prevent the insert substrate from being rapidly lifted due to the reset of the elastic element, thus preventing personal injury.

[0024] The beneficial effects of this utility model are as follows:

[0025] This application achieves preliminary and precise positioning of the insert substrate through the precise insertion of the pin rod into the positioning hole in the positioning pin assembly and the close fit between the fixing seat and the connecting hole. At the same time, the cooperation of the threaded rod, knob and reinforcing nut in the displacement assembly allows for easy adjustment of the position of the U-shaped plate, achieving precise engagement and fixation of the outer and inner slots. This restricts the position of the pin rod and effectively prevents the insert from shifting due to external forces during the electroforming process, meeting the stringent positioning requirements of high-precision optical product manufacturing.

[0026] This application uses a displacement component to simultaneously release the fixing effect on the pin, facilitating the quick removal of the insert. At the same time, the elastic element resets and pushes the insert out of the mounting groove, further achieving the effect of quick removal of the insert.

[0027] This application, through the design of a buffer ring and a buffer slot, can enhance stability when inserting the pin, and also increase the friction on the pin when removing the insert, thus preventing the insert from being quickly pushed up due to the reset of the elastic element and preventing personal injury. Attached Figure Description

[0028] Figure 1 This is a perspective view of an embedded positioning pin structure for an optical electroforming mold insert proposed in this application;

[0029] Figure 2 This is a schematic diagram of the U-shaped plate and positioning pin assembly structure of an embedded positioning pin structure for an optical electroforming mold insert proposed in this application.

[0030] Figure 3 This is a schematic diagram of the mounting groove and connecting hole structure of the embedded positioning pin structure of the optical electroforming mold insert proposed in this application;

[0031] Figure 4 This is a schematic diagram of the threaded groove structure of the embedded positioning pin structure of the optical electroforming mold insert proposed in this application;

[0032] Figure 5 This is a cross-sectional view of the mold body for an embedded positioning pin structure for an optical electroforming mold insert proposed in this application;

[0033] Figure 6 This is a schematic diagram of the opening and external slot structure of the embedded positioning pin structure of an optical electroforming mold insert proposed in this application;

[0034] Figure 7 This is a schematic diagram of the inner slot and buffer slot structure of the embedded positioning pin structure of the optical electroforming mold insert proposed in this application.

[0035] In the diagram: 1. Mold body; 2. Insert base; 3. Positioning assembly; 31. U-shaped plate; 32. Through port; 33. Guide rod; 34. Reinforcing nut; 35. Knob; 36. Threaded rod; 37. Guide hole; 38. Slot; 39. External slot; 310. Internal slot; 4. Positioning pin assembly; 41. Connecting hole; 42. Positioning hole; 43. Threaded rod; 44. Threaded groove; 45. Fixing seat; 46. Spring; 47. Movable ring; 48. Pin; 5. Mounting groove; 6. Buffer ring; 7. Buffer slot. Detailed Implementation

[0036] The technical solution of this utility model will be further described in detail below with reference to specific embodiments.

[0037] Reference Figures 1-7 This utility model provides an embedded positioning pin structure for an optical electroforming mold insert, including a mold body 1, multiple positioning pin assemblies 4, and a positioning assembly 3. The top of the mold body 1 has an installation groove 5, and the insert base 2 is embedded in the installation groove 5.

[0038] Multiple positioning pin assemblies 4 are disposed between the bottom of the insert base 2 and the bottom inner wall of the mounting groove 5. The positioning pin assembly 4 includes a connecting hole 41 opened in the bottom inner wall of the mounting groove 5, and a positioning hole 42 is opened at the bottom of the connecting hole 41. The diameter of the positioning hole 42 is smaller than the diameter of the connecting hole 41. A fixing seat 45 is installed at the bottom of the insert base 2 and fits against the inner wall of the connecting hole 41. A pin 48 inserted into the positioning hole 42 is fixed at the bottom middle of the fixing seat 45. An elastic element inserted into the connecting hole 41 is provided at the bottom of the fixing seat 45. A screw rod 43 is fixed at the top middle of the fixing seat 45. A screw groove 44 is opened at the bottom of the insert base 2 and screwed with the screw rod 43. The screwing action of the screw rod 43 and the screw groove 44 facilitates the disassembly and assembly of the entire positioning pin assembly 4.

[0039] The positioning component 3 is mounted on the mold body 1 and is used to fix the positioning pin component 4. The positioning component 3 includes slots 38 on both sides of the bottom of one end of the mold body 1, and the slots 38 are connected to the positioning holes 42. The same U-shaped plate 31 is inserted into the two slots 38. The U-shaped plate 31 has multiple openings 32 for the pin rods 48 to pass through. A displacement component for adjusting the position of the U-shaped plate 31 is provided on one side of the mold body 1. One end of each opening 32 is provided with an outer groove 39, and one side of each pin rod 48 is provided with an inner groove 310. The inner groove 310 engages with the outer groove 39. The displacement component includes a threaded rod 36 rotatably connected to one end of the mold body 1. A threaded hole for threading the threaded rod 36 is provided at the middle of one end of the U-shaped plate 31. One end of the threaded rod 36 is fixed. The mold body 1 has a knob 35 and a reinforcing nut 34 for reinforcing the U-shaped plate 31 is screwed onto the outer wall of the threaded rod 36. Two guide holes 37 are opened at one end of the mold body 1, and a guide rod 33 inserted into the guide hole 37 is fixed on the inner wall of one end of the U-shaped plate 31. When the insert base 2 is inserted into the mounting groove 5, the positioning pin assembly 4 is inserted at the same time. By rotating the threaded rod 36 through the knob 35, the U-shaped plate 31 moves under the guidance of the guide rod 33 along the guide hole 37, so that the outer slot 39 at one end of the through 32 engages with the inner slot 310 on one side of the pin 48. The U-shaped plate 31 is then reinforced by the reinforcing nut 34, which restricts the position of the pin 48 and effectively prevents the insert from shifting due to external force during the electroforming process, thus meeting the stringent positioning requirements of high-precision optical product production.

[0040] To achieve quick disassembly, refer to... Figure 2 , Figure 5 and Figure 7 The elastic element includes a movable ring 47 sleeved on the outer wall of the pin 48, and the movable ring 47 is attached to the bottom inner wall of the connecting hole 41. A spring 46 is fixedly installed on the top of the movable ring 47 and the bottom of the fixed seat 45. When the insert is removed, the elastic element resets and drives the insert base 2 to be pushed out in the mounting groove 5, so as to achieve the effect of quickly removing the insert.

[0041] To improve safety, refer to Figure 5 and Figure 7 The outer wall of the pin 48 is provided with buffer grooves 7 distributed at equal intervals, and the inner wall of the positioning hole 42 is fixed with buffer rings 6 that are inserted into the buffer grooves 7 at equal intervals. The buffer rings 6 are designed to be made of rubber, and the cross sections of the buffer rings 6 and the buffer grooves 7 are both designed to be triangular. When disassembling the insert, the friction force on the pin 48 is increased by the snapping action of the buffer rings 6 and the buffer grooves 7, so as to avoid the phenomenon that the insert base 2 is quickly pushed up due to the reset of the elastic element, and prevent personnel injury.

[0042] Working principle: When the insert base 2 is embedded, the positioning pin assembly 4 starts to work. The fixing seat 45 at the bottom of the insert base 2 fits into the connecting hole 41 on the bottom inner wall of the mounting groove 5. The pin 48 at the bottom of the fixing seat 45 is inserted into the positioning hole 42 at the bottom of the connecting hole 41. At the same time, the movable ring 47 sleeved on the outer wall of the pin 48 fits into the bottom inner wall of the connecting hole 41. The top of the movable ring 47 and the spring 46 at the bottom of the fixing seat 45 are in a compressed state, providing elastic support for the insert base 2.

[0043] Next, in the positioning assembly 3, the U-shaped plate 31 is inserted into the slots 38 on both sides of the bottom of one end of the mold body 1. The pin 48 passes through the through-hole 32 on the U-shaped plate 31. At this time, the threaded rod 36 is rotated by the knob 35. Under the guidance of the guide rod 33 along the guide hole 37, the U-shaped plate 31 moves so that the outer slot 39 at one end of the through-hole 32 engages with the inner slot 310 on one side of the pin 48. Then, the U-shaped plate 31 is reinforced by the reinforcing nut 34 to fix the pin 48.

[0044] During disassembly, loosen the reinforcing nut 34, rotate the threaded rod 36 in the opposite direction to move the U-shaped plate 31, separate the outer slot 39 from the inner slot 310, and the spring 46 resets to push the fixing seat 45 to push the insert base 2 out of the mounting groove 5, thus achieving rapid removal of the insert. At the same time, the buffer slot 7 on the outer wall of the pin 48 cooperates with the buffer ring 6 on the inner wall of the positioning hole 42 to enhance the friction on the pin 48, avoid the phenomenon of the insert being quickly pushed up due to the reset of the elastic element, and prevent personnel injury.

[0045] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An embedded positioning pin structure for an optical electroforming mold insert, characterized in that, include: The mold body (1) has an installation groove (5) on its top, and an insert base (2) is embedded in the installation groove (5). Multiple locating pin assemblies (4) are disposed between the bottom of the insert base (2) and the bottom inner wall of the mounting groove (5); Positioning component (3), which is set on the mold body (1) and is used to add a positioning pin component (4).

2. An embedded dowel pin structure for an optical electroformed mold insert as defined in claim 1, wherein, The positioning pin assembly (4) includes a connecting hole (41) opened on the inner wall of the bottom of the mounting groove (5), and a positioning hole (42) is opened at the bottom of the connecting hole (41). The diameter of the positioning hole (42) is smaller than the diameter of the connecting hole (41). The bottom of the insert base (2) is fitted with a fixing seat (45) that fits against the inner wall of the connecting hole (41), and a pin (48) inserted into the positioning hole (42) is fixed at the middle of the bottom of the fixing seat (45). An elastic element inserted into the connecting hole (41) is provided at the bottom of the fixing seat (45).

3. An embedded dowel pin structure for an optical electroformed mold insert as defined in claim 2, wherein, Each of the fixed bases (45) has a screw rod (43) fixed at the top center, and the bottom of the insert base (2) has a screw groove (44) for screwing the screw rod (43).

4. The insert pin structure for optical electroformed mold inserts of claim 2, wherein, The elastic element includes a movable ring (47) sleeved on the outer wall of the pin (48), and the movable ring (47) is attached to the bottom inner wall of the connecting hole (41). A spring (46) is fixedly installed on the top of the movable ring (47) and the bottom of the fixed seat (45).

5. The embedded positioning pin structure for an optical electroforming mold insert according to claim 4, characterized in that, The positioning component (3) includes slots (38) on both sides of the bottom of one end of the mold body (1), and the slots (38) are connected to the positioning holes (42). The same U-shaped plate (31) is inserted into the two slots (38). The U-shaped plate (31) has multiple openings (32) for the pins (48) to pass through. A displacement component for adjusting the position of the U-shaped plate (31) is provided on one side of the mold body (1). An outer slot (39) is provided at one end of each opening (32), and an inner slot (310) is provided on one side of each pin (48). The inner slot (310) is engaged with the outer slot (39).

6. An embedded dowel pin structure for an optical electroformed mold insert as defined in claim 5, wherein, The displacement assembly includes a threaded rod (36) rotatably connected to one end of the mold body (1), and a threaded hole for threading the threaded rod (36) is provided at the middle of one end of the U-shaped plate (31). A knob (35) is fixed at one end of the threaded rod (36), and a reinforcing nut (34) for reinforcing the U-shaped plate (31) is also threaded onto the outer wall of the threaded rod (36).

7. An embedded dowel pin structure for an optical electroformed mold insert as defined in claim 6, wherein, Two guide holes (37) are provided at one end of the mold body (1), and a guide rod (33) inserted into the guide hole (37) is fixed on the inner wall of one end of the U-shaped plate (31).

8. An embedded dowel pin structure for an optical electroformed mold insert as defined in claim 7, wherein, The outer wall of the pin (48) is provided with buffer slots (7) distributed at equal intervals, and the inner wall of the positioning hole (42) is fixed with buffer rings (6) inserted at equal intervals in the buffer slots (7). The cross sections of the buffer rings (6) and the buffer slots (7) are both designed as triangles.

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