Injection mold for producing spectacle frame

Abstract

The utility model discloses an injection mold for spectacle frame production, which relates to the technical field of spectacle frame production and processing, and comprises a lower mold base and an upper mold base, the opposite sides of the lower mold base and the upper mold base are respectively provided with a lower embedding groove and an upper embedding groove, and a lower mold core and an upper mold core are respectively embedded and fixed in the lower embedding groove and the upper embedding groove; according to the injection mold, the first ejection plate is driven to ascend through the lifting adjusting mechanism, and the first ejection plate drives the mirror bracket ejection mechanism to automatically eject a mirror bracket product out of the lower mold core in the ascending process, so that the injection mold has an automatic demolding function and is convenient to use, and the second ejection plate is driven to ascend through the lifting adjusting mechanism; and the second ejection plate drives the mold core ejection mechanism to automatically eject the lower mold core out of the lower mold base in the ascending process, so that the lower mold core can be easily taken out from the lower mold base when the mold core of the injection mold is replaced, the mold core replacement difficulty is reduced, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of production and processing of spectacle frames, in particular to an injection mold for producing spectacle frames. Background Art

[0002] Glasses are a common vision correction tool, as well as a fashion accessory and protective equipment. They mainly consist of frames and lenses. According to different needs and uses, the types and functions of glasses also vary. The spectacle frame is an important part of glasses. It not only supports the lenses but also affects the wearing comfort and aesthetic appearance. There are many materials for spectacle frames, and among them, plastic spectacle frames are generally produced through corresponding injection molds.

[0003] For example, the utility model patent with the application number 202221192357.0 discloses an injection mold for a filter spectacle frame, including a mold body. A first fitting groove is opened in the middle of the top wall of the mold body, and a second fitting groove is opened at the rear side of the bottom wall of the first fitting groove. Threaded holes are opened at the four corners of the top wall of the mold body. The threaded holes can cooperate with fixing parts to install the first fitting groove and the second fitting groove at the top of the mold body with an injection mechanism, and the actual spectacle frame injection molding work is more convenient.

[0004] Based on the prior art, it is found that most of the existing injection molds for producing spectacle frames have a single function and do not have an automatic demolding function, resulting in the inability to conveniently take out the spectacle frame from the mold cavity after injection molding, and it is inconvenient to use. Moreover, they do not have the function of automatically ejecting the lower mold core from the lower mold base, resulting in difficulty in taking out the lower mold core when replacing the mold core because it is embedded and inserted in the lower mold base, increasing the difficulty of mold core replacement and having low practicability. Therefore, the utility model proposes an injection mold for producing spectacle frames to solve the problems existing in the prior art. Summary of the Utility Model

[0005] Aiming at the above problems, the purpose of the utility model is to propose an injection mold for producing spectacle frames to solve the problems that the existing injection molds for producing spectacle frames do not have an automatic demolding function, resulting in the inability to conveniently take out the spectacle frame from the mold cavity after injection molding, and do not have the function of automatically ejecting the lower mold core from the lower mold base, resulting in difficulty in taking out the lower mold core when replacing the mold core because it is embedded and inserted in the lower mold base.

[0006] To achieve the object of the present utility model, the present utility model is realized through the following technical solutions: An injection mold for producing spectacle frames, comprising a lower mold base and an upper mold base. Opposite sides of the lower mold base and the upper mold base are respectively provided with a lower fitting groove and an upper fitting groove. A lower mold core and an upper mold core are respectively fitted and fixed in the lower fitting groove and the upper fitting groove. A groove is provided at the bottom end of the lower mold base, and a first top plate driven to lift by a lifting adjustment mechanism is arranged inside the groove. A spectacle frame ejection mechanism is fixed to the top end of the first top plate. Second top plates driven to lift by the lifting adjustment mechanism are arranged on both sides of the first top plate, and a mold core ejection mechanism is fixed to the top end of the second top plate.

[0007] Further improvement lies in that: The lifting adjustment mechanism includes a bidirectional lead screw rotatably connected inside the groove and driven to rotate by a motor, and threaded blocks threadedly sleeved on both sides of the bidirectional lead screw. A limiting mechanism is fixed to the bottom end of the threaded block, a trapezoidal block is fixed to the top end of the threaded block, first triangular blocks adapted to the trapezoidal block are respectively fixed to both sides of the bottom end of the first top plate, and second triangular blocks adapted to the trapezoidal block are fixed to the bottom end of the second top plate.

[0008] Further improvement lies in that: The limiting mechanism includes a limiting block fixed to the bottom end of the threaded block and a limiting rod slidably penetrating through the limiting block. Both ends of the limiting rod are respectively fixed to the inner walls of both sides of the groove.

[0009] Further improvement lies in that: Opposite sides of the lower mold core and the upper mold core are respectively provided with a lower mold cavity and an upper mold cavity. The spectacle frame ejection mechanism includes a first ejector rod fixed to the top end of the first top plate and a first ejector block fixed to the top end of the first ejector rod. The first ejector block is fitted and inserted into the bottom end inside the lower mold cavity. The top end of the first ejector rod slidably penetrates through the lower mold base and the lower mold core and is fixedly connected to the bottom end of the first ejector block. A first limiting spring is slidably sleeved on the outside of the first ejector rod and is fixed between the first top plate and the top end inside the groove.

[0010] Further improvement lies in that: The mold core ejection mechanism includes a second ejector rod fixed to the top end of the second top plate and a second ejector block fixed to the top end of the second ejector rod. The second ejector block is fitted and inserted into the bottom end inside the lower fitting groove. A second limiting spring is slidably sleeved on the outside of the second ejector rod and is fixed between the second top plate and the top end inside the groove.

[0011] Further improvement lies in that: Cooling water cavities are respectively provided inside the lower mold base and the upper mold base. Water inlet pipes and water outlet pipes communicated with the cooling water cavities are respectively fixed to the left and right side walls of the lower mold base and the upper mold base.

[0012] Further improvement lies in that: Positioning insertion posts are symmetrically fixed to the bottom end of the upper mold base. Positioning slots adapted to the positioning insertion posts are provided at the top end of the lower mold base. Mounting plates are respectively fixed to opposite sides of the lower mold base and the upper mold base.

[0013] The beneficial effects of the present utility model are as follows: The present utility model includes a lower die base and an upper die base. The first top plate is driven to rise by a lifting adjustment mechanism. During the rising process of the first top plate, the spectacle frame ejection mechanism is driven to automatically eject the spectacle frame product from the lower die core, so that the injection mold has an automatic demolding function, which is convenient to use. And the second top plate is driven to rise by the lifting adjustment mechanism. During the rising process of the second top plate, the die core ejection mechanism is driven to automatically eject the lower die core from the lower die base, so that the lower die core can be easily removed from the lower die base when replacing the die core, reducing the difficulty of die core replacement and having high practicability. Description of the Drawings

[0014] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0015] Figure 2 is a front sectional view of the present utility model;

[0016] Figure 3 is the present utility model Figure 2 the enlarged view of part A in.

[0017] Wherein: 1. Lower die base; 2. Upper die base; 3. Lower fitting groove; 4. Upper fitting groove; 5. Lower die core; 6. Upper die core; 7. Groove; 8. First top plate; 9. Second top plate; 10. Motor; 11. Bidirectional lead screw; 12. Threaded block; 13. Trapezoidal block; 14. First triangular block; 15. Second triangular block; 16. Limit block; 17. Limit rod; 18. Lower die cavity; 19. Upper die cavity; 20. First ejector rod; 21. First ejector block; 22. First limit spring; 23. Second ejector rod; 24. Second ejector block; 25. Second limit spring; 26. Cooling water cavity; 27. Water inlet pipe; 28. Water outlet pipe; 29. Positioning plug post; 30. Positioning slot; 31. Mounting plate. Detailed Embodiment

[0018] In order to deepen the understanding of the present utility model, the following will further describe the present utility model in detail in combination with embodiments. These embodiments are only used to explain the present utility model and do not constitute a limitation to the protection scope of the present utility model. [[ID=e26]]

[0019] According to Figure 1 、 Figure 2 、 Figure 3As shown, this embodiment provides an injection mold for producing eyeglass frames, including a lower mold base 1 and an upper mold base 2 that adapt to each other. The upper mold base 2 is located at the top of the lower mold base 1 and is combined with the lower mold base 1 to form a complete injection mold. The top of the lower mold base 1 is provided with a lower fitting groove 3, and the bottom of the upper mold base 2 is provided with an upper fitting groove 4. A lower mold core 5 is fitted and inserted inside the lower fitting groove 3, and after fitting and inserting, the lower mold core 5 is fixed by bolts. An upper mold core 6 is fitted and inserted in the upper fitting groove 4, and after fitting and inserting, the upper mold core 6 is fixed by bolts. A square groove 7 is provided at the bottom end of the lower mold base 1, and a first top plate 8 is provided in the middle position inside the groove 7, and the first top plate 8 is driven and moved upward by a lifting and adjusting mechanism, and a mechanism for lifting the lower mold is fixed on the top of the first top plate 8. The frame ejection mechanism for ejecting the frame product in the core 5 drives the first top plate 8 to rise through the lifting and adjusting mechanism. During the rising process of the first top plate 8, it drives the frame ejection mechanism to automatically eject the frame product from the lower mold core 5, so that the injection mold has an automatic demolding function. Second top plates 9 are provided on the left and right sides of the first top plate 8, and the second top plate 9 is driven and moved upward by the lifting and adjusting mechanism. A core ejection mechanism for ejecting the lower mold core 5 out of the lower fitting groove 3 is fixed on the top of the second top plate 9. The second top plate 9 is driven to rise through the lifting and adjusting mechanism. During the rising process of the second top plate 9, it drives the core ejection mechanism to automatically eject the lower mold core 5 from the lower mold base 1, so that the injection mold can easily remove the lower mold core 5 from the lower mold base 1 when the mold core is replaced.

[0020] The lifting and lowering adjustment mechanism includes a motor 10, a bidirectional screw rod 11 and a threaded block 12, wherein the motor 10 is fixed to the right outer wall of the lower die base 1 by bolts, the bidirectional screw rod 11 is rotatably connected to the inside of the groove 7 through a bearing, and the right end of the bidirectional screw rod 11 passes through the bearing to the outside of the lower die base 1 and is fixedly connected to the output end shaft of the motor 10, so that the bidirectional screw rod 11 is driven to rotate by the motor 10, and the threaded block 12 is provided with two groups, and the two groups of threaded blocks 12 are respectively threadedly sleeved on both sides of the bidirectional screw rod 11 and the threaded connection directions are opposite, and the bottom end of the threaded block 12 A fixed limiting mechanism limits the threaded block 12, making it more stable during movement. A trapezoidal block 13 with an isosceles trapezoidal design is fixed to the top of the threaded block 12. First triangular blocks 14 with a right-angled triangle design are fixed on both sides of the bottom end of the first top plate 8 by bolts. The inclined surface of the first triangular block 14 is relatively adapted to the inclined surface of the trapezoidal block 13. A second triangular block 15 with a right-angled triangle design is fixed to the bottom end of the second top plate 9. The inclined surface of the second triangular block 15 is relatively adapted to the inclined surface of the trapezoidal block 13.

[0021] The motor 10 drives the bidirectional screw 11 to rotate, so that the threaded blocks 12 on both sides of the bidirectional screw 11 drive the trapezoidal blocks 13 to move toward each other. During the displacement process, the trapezoidal blocks 13 conflict with the first triangular blocks 14 and push up the first triangular blocks 14 under the interference of the inclined surface. The first triangular blocks 14 then drive the first top plate 8 to rise synchronously.

[0022] The motor 10 drives the bidirectional screw 11 to rotate in the opposite direction, so that the threaded blocks 12 on both sides of the bidirectional screw 11 drive the trapezoidal block 13 to move in the opposite direction. During the displacement of the trapezoidal block 13, it conflicts with the second triangular block 15 and lifts up the second triangular block 15 under the interference of the inclined surface. The second triangular block 15 then drives the second top plate 9 to rise synchronously.

[0023] The limiting mechanism includes a limiting block 16 and a limiting rod 17, wherein the limiting blocks 16 are provided in two groups and are respectively fixed to the bottom ends of the two groups of threaded blocks 12 by bolts. The limiting blocks 16 slide through the two groups of limiting blocks 16, and the left and right ends of the limiting rod 17 are respectively fixed to the left and right inner walls of the groove 7 by screws. The limiting block 16 is limited by the limiting rod 17, so that the threaded block 12 is more stable during movement.

[0024] The top of the lower mold core 5 is provided with a lower mold cavity 18, and the bottom of the upper mold core 6 is provided with an upper mold cavity 19. The lower mold cavity 18 and the upper mold cavity 19 together constitute a complete frame product injection mold cavity (including the frame mold cavity of the frame and the temple mold cavity of the frame). The frame ejection mechanism includes a first ejector rod 20 and a first ejector block 21, wherein the first ejector rod 20 is fixed to the top of the first top plate 8, and the first ejector block 21 is fixed to the top of the first ejector rod 20, and the first ejector block 21 is inserted into the bottom end of the lower mold cavity 18. The bottom end of the lower mold cavity 18 is provided with a receiving groove adapted to the first ejector block 21. The first ejector rod 20 is fixed to the top of the first top plate 8, and the first ejector block 21 is fixed to the top of the first ejector rod 20. The top slides through the lower mold base 1 and the lower mold core 5 and is fixedly connected to the bottom end of the first top block 21. The external sliding sleeve of the first push rod 20 is provided with a first limit spring 22, and the first limit spring 22 is fixed between the first top plate 8 and the top end inside the groove 7. The first limit spring 22 provides a downward elastic ejection force for the first top plate 8, so that the first push block 21 is always engaged and inserted in the accommodating groove at the bottom end of the lower mold cavity 18 in the natural state. The first push rod 20 is driven to rise by the first top plate 8, and the first push rod 20 rises and uses the first top block 21 to eject the frame product in the lower mold cavity 18.

[0025] The core ejection mechanism includes a second ejector rod 23 and a second ejector block 24, wherein the second ejector rod 23 is fixed to the top of the second ejector plate 9, the second ejector block 24 is fixed to the top of the second ejector rod 23, and the second ejector block 24 is engaged and inserted in the bottom end of the lower engaging groove 3, and the bottom end of the lower engaging groove 3 is provided with a receiving groove adapted to the second ejector block 24, and the outer sliding sleeve of the second ejector rod 23 is provided with a second limit spring 25, which is fixed between the second ejector plate 9 and the top end of the groove 7. The second limit spring 25 provides the second ejector plate 9 with a downward elastic ejecting force, so that the second ejector block 24 is always engaged and inserted in the receiving groove at the bottom end of the lower engaging groove 3 in the natural state, and the second ejector rod 23 is driven to rise by the second ejector plate 9, and the second ejector rod 23 rises and uses the second ejector block 24 to eject the lower mold core 5 in the lower engaging groove 3.

[0026] Both the lower die base 1 and the upper die base 2 are internally provided with cooling water cavities 26 designed in a mouth shape. Water inlet pipes 27 communicating with the cooling water cavities 26 are fixed to the left side walls of the lower die base 1 and the upper die base 2, and water outlet pipes 28 communicating with the cooling water cavities 26 are fixed to the right side walls of the lower die base 1 and the upper die base 2. The water inlet pipes 27 are connected to an external cooling water supply device through pipelines, and the water outlet pipes 28 are connected to an external cooling water recovery device through pipelines.

[0027] Symmetrically distributed positioning insertion posts 29 are welded and fixed to the bottom end of the upper die base 2. Positioning slots 30 adapted to the positioning insertion posts 29 are provided at the top end of the lower die base 1. When the upper die base 2 and the lower die base 1 are closed, the positioning insertion posts 29 are inserted into the positioning slots 30, enabling the upper die base 2 and the lower die base 1 to be accurately docked. Mounting plates 31 are fixed to the bottom end of the lower die base 1 and the top end of the upper die base 2 by bolts. Among them, the mounting plate 31 located below is fixed to the injection molding machine table by bolts, and the mounting plate 31 located above is fixed to the output end of a hydraulic cylinder on the injection molding machine table by bolts.

[0028] When the spectacle frames in the lower die core 5 and the upper die core 6 are injection molded, first, an external cooling water supply device is used to inject cooling water into the cooling water cavity 26 through the water inlet pipe 27. The cooling water in the cooling water cavity 26 is discharged through the water outlet pipe 28 after heat exchange with the lower die base 1 and the upper die base 2, realizing the accelerated cooling of the lower die core 5, the upper die core 6, and the spectacle frame products therein. Then, the hydraulic cylinder on the injection molding machine table is used to drive the upper die base 2 to rise and separate from the lower die base 1. At this time, the spectacle frame products are tightly fitted in the lower die cavity 18 on the lower die core 5. At this time, the lifting adjustment mechanism is used to drive the first top plate 8 to rise. During the rising process of the first top plate 8, the spectacle frame ejection mechanism drives the spectacle frame products to be automatically ejected from the lower die core 5, realizing automatic demolding.

[0029] In this embodiment, the lower die core 5 and the upper die core 6 are respectively fitted and inserted into the lower die base 1 and the upper die base 2 and fixed by bolts (bolt fixing is a prior art means, which is not elaborated in the drawings of this embodiment). When it is necessary to disassemble the lower die core 5 and the upper die core 6 for replacement, first, the bolts for fixing the lower die core 5 and the upper die core 6 are removed. At this time, due to gravity, the upper die core 6 is easily taken out from the upper die base 2, while the lower die core 5 is tightly inserted into the lower fitting groove 3 of the lower die base 1. At this time, the lifting adjustment mechanism is used to drive the second top plate 9 to rise. During the rising process of the second top plate 9, the die core ejection mechanism drives the lower die core 5 to be automatically ejected from the lower die base 1, making it easy to take out the lower die core 5 from the lower fitting groove 3.

[0030] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An injection mold for producing spectacle frames, comprising a lower mold base (1) and an upper mold base (2), characterized in that: On the opposite sides of the lower die base (1) and the upper die base (2), a lower fitting groove (3) and an upper fitting groove (4) are respectively provided. A lower die core (5) and an upper die core (6) are respectively fitted and fixed in the lower fitting groove (3) and the upper fitting groove (4). A groove (7) is provided at the bottom end of the lower die base (1). Inside the groove (7), there is a first top plate (8) driven to lift by a lifting adjustment mechanism. A spectacle frame ejection mechanism is fixed to the top end of the first top plate (8). On both sides of the first top plate (8), there are second top plates (9) driven to lift by the lifting adjustment mechanism. A die core ejection mechanism is fixed to the top end of the second top plate (9).

2. The injection mold for producing spectacle frames according to claim 1, characterized in that: The lifting adjustment mechanism includes a bidirectional lead screw (11) rotatably connected inside the groove (7) and driven to rotate by a motor (10), and thread blocks (12) threadedly sleeved on both sides of the bidirectional lead screw (11). A limiting mechanism is fixed to the bottom end of the thread block (12). A trapezoidal block (13) is fixed to the top end of the thread block (12). On both sides of the bottom end of the first top plate (8), there are first triangular blocks (14) adapted to the trapezoidal block (13). A second triangular block (15) adapted to the trapezoidal block (13) is fixed to the bottom end of the second top plate (9).

3. The injection mold for producing spectacle frames according to claim 2, characterized in that: The limiting mechanism includes a limiting block (16) fixed to the bottom end of the thread block (12) and a limiting rod (17) slidably penetrating through the limiting block (16). Both ends of the limiting rod (17) are respectively fixed to the inner walls on both sides of the groove (7).

4. The injection mold for producing spectacle frames according to claim 1, characterized in that: On the opposite sides of the lower die core (5) and the upper die core (6), a lower die cavity (18) and an upper die cavity (19) are respectively provided. The spectacle frame ejection mechanism includes a first ejector rod (20) fixed to the top end of the first top plate (8) and a first ejector block (21) fixed to the top end of the first ejector rod (20). The first ejector block (21) is fitted and inserted into the bottom end inside the lower die cavity (18). The top end of the first ejector rod (20) slidably penetrates through the lower die base (1) and the lower die core (5) and is fixedly connected to the bottom end of the first ejector block (21). A first limiting spring (22) is slidably sleeved on the outside of the first ejector rod (20) and is fixed between the first top plate (8) and the top end inside the groove (7).

5. The injection mold for producing spectacle frames according to claim 1, characterized in that: The die core ejection mechanism includes a second ejector rod (23) fixed to the top end of the second top plate (9) and a second ejector block (24) fixed to the top end of the second ejector rod (23). The second ejector block (24) is fitted and inserted into the bottom end inside the lower fitting groove (3). A second limiting spring (25) is slidably sleeved on the outside of the second ejector rod (23) and is fixed between the second top plate (9) and the top end inside the groove (7).

6. The injection mold for producing spectacle frames according to claim 1, characterized in that: Cooling water cavities (26) are respectively provided inside the lower die base (1) and the upper die base (2). Water inlet pipes (27) and water outlet pipes (28) respectively communicating with the cooling water cavities (26) are fixed to the left and right side walls of the lower die base (1) and the upper die base (2).

7. An injection mold for producing spectacle frames according to claim 1, characterized in that: Positioning insertion posts (29) are symmetrically fixed to the bottom end of the upper die base (2). A positioning slot (30) adapted to the positioning insertion posts (29) is provided at the top end of the lower die base (1). Mounting plates (31) are fixed to the opposite sides of the lower die base (1) and the upper die base (2).

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