Three-time demoulding mechanism of double-layer round-wall reagent bottle injection mould

Abstract

The application discloses a three-time demolding mechanism of a double-layer round-wall reagent bottle injection mold, which comprises a double-layer round-wall reagent bottle, an inclined ejector, a ejector cylinder, an ejector cylinder needle, an inclined ejector seat, an inclined ejector slider, an ejector cylinder needle fixing strip, a pressing block, a front mold plate, a rear mold plate, a rear mold core, a square iron, a bottom plate, a first push plate, a second push plate, a third push plate, a fourth push plate, a top rod, a first limiting column, a second limiting column, a first buckle machine seat, a first buckle machine top rod, a first buckle machine pull rod, a first buckle machine slider, a first buckle machine spring, a second buckle machine seat, a second buckle machine top rod, a second buckle machine pull rod, a second buckle machine slider and a second buckle machine spring. The injection mold opening action and sequence are limited through the cooperation of the limiting mechanism, the buckle mechanism and the power mechanism, the smooth demolding of the inner wall protruding buckle position of the double-layer round-wall reagent bottle is realized, the demolding force of the double-layer round-wall reagent bottle injection mold is gradually split and loaded on the injection product in a three-time demolding mode, the quality defect phenomena such as scratch deformation or fracture of the double-layer round-wall reagent bottle product caused by excessive demolding force are avoided, and the mass productivity and the mold service life of the injection mold are improved.

Description

Technical Field

[0001] This invention relates to an injection mold structure, and more particularly to a three-stage demolding mechanism for a double-walled reagent bottle injection mold. The three-stage demolding mechanism solves the injection mold design and injection production problems of the inner wall snap-on demolding of double-walled reagent bottles and the problem of excessive demolding force in the double-walled structure causing product damage. Background Technology

[0002] Injection molded products account for the largest proportion of industrial parts. If injection molded products have assembly requirements, they are often designed with snap-fit ​​structures. When designing injection molds, the movement mechanism of the mold needs to be designed to avoid the snap-fit ​​and achieve demolding of the injection molded products. Medical consumables such as reagent bottles need to be designed with double-layer circular wall structures due to sealing requirements. In injection molding production, due to the cooling and shrinkage of the plastic material, the double-layer circular wall part has a greater adhesion force to the mold core. Forced demolding can easily cause dragging or even breakage on the surface of the injection molded product. Summary of the Invention

[0003] This invention addresses the aforementioned technical challenges by providing a three-stage demolding mechanism for a double-walled reagent bottle injection mold. The mechanism includes a double-walled reagent bottle, an inclined ejector, a sleeve ejector, a sleeve ejector pin, an inclined ejector seat, an inclined ejector slider, a sleeve ejector pin fixing strip, a pressure block, a front template, a rear template, a rear mold core, a square iron plate, a base plate, a first push plate, a second push plate, a third push plate, a fourth push plate, an ejector roller, a first limiting post, a second limiting post, a first locking base, a first locking ejector rod, a first locking pull rod, a first locking slider, a first locking spring, a second locking base, a second locking ejector rod, a second locking pull rod, a second locking slider, and a second locking spring. The three-stage demolding mechanism comprises a cavity system, an inclined ejector mechanism, a sleeve ejector mechanism, a push plate mechanism, and a limiting system.

[0004] The double-walled reagent bottle is an injection-molded product with a double-walled structure, and there are protruding fasteners on the inner side of the outer wall.

[0005] The cavity system includes a front mold plate, a rear mold plate, a rear mold core, an angled ejector, an ejector sleeve, and an ejector pin. The rear mold core is fixedly installed in a groove on the rear mold plate. The front mold plate and the rear mold plate are installed together. In the mold closed state, the front mold plate, the rear mold core, the angled ejector, the ejector sleeve, and the ejector pin together form the injection cavity of the double-walled reagent bottle.

[0006] The inclined top mechanism includes an inclined top, an inclined top seat, and an inclined top slider. The inclined top is installed in an inclined guide groove opened on the rear template and can move obliquely up and down along the guide groove. The inclined top seat is fixedly installed on the third push plate. The inclined top slider is installed in a groove opened on the inclined top seat and can slide left and right along the groove. The bottom end of the inclined top is installed on the central rotating shaft of the inclined top slider.

[0007] The ejector mechanism includes an ejector sleeve, an ejector needle, an ejector needle fixing strip, and a pressure block. The ejector needle is fitted inside the ejector sleeve and can slide up and down along the inner wall of the ejector sleeve. The lower end of the ejector sleeve is fixedly installed on a first push plate. The ejector needle fixing strip is fixedly installed in a groove opened on the ejector needle. The pressure block is fixedly installed on a second push plate and presses the ejector needle fixing strip tightly onto the second push plate. A square through hole with the same width as the ejector needle fixing strip is opened on the ejector sleeve. The ejector needle fixing strip can move up and down relative to the square through hole on the ejector sleeve.

[0008] The push plate mechanism includes a square iron, a base plate, a first push plate, a second push plate, a third push plate, and a fourth push plate. The square iron is fixedly installed with the rear template and the base plate. The first push plate, the second push plate, the third push plate, and the fourth push plate are installed in parallel between the rear template and the base plate. The first push plate, the second push plate, the third push plate, and the fourth push plate can move up and down relative to the base plate under the action of the top roller.

[0009] The limiting system includes a top roller, a first limiting post, a second limiting post, a first locking mechanism, and a second locking mechanism. The first locking mechanism includes a first locking base, a first locking top rod, a first locking pull rod, a first locking slider, and a first locking spring. The second locking mechanism includes a second locking base, a second locking top rod, a second locking pull rod, a second locking slider, and a second locking spring. The first locking base is fixedly installed on the second push plate, the first locking top rod is fixedly installed on the base plate, and the first locking pull rod is fixedly installed on the third and fourth push plates. The first locking slider and the first locking spring are installed inside the first locking base. The first locking spring is in a pre-compressed state, and the first locking slider... Under the pressure of the protruding inclined surface at the top of the first buckle rod and the first buckle spring, it can slide left and right along the horizontal groove opened in the first buckle seat. When the first buckle slider slides to the right side, the buckle position of the first buckle pull rod disengages from the first buckle slider. The second buckle seat is fixedly installed on the second push plate, the second buckle rod is fixedly installed on the base plate, and the second buckle pull rod is fixedly installed on the third and fourth push plates. The structure of the second buckle slider and the second buckle spring inside the second buckle mechanism is the same as that of the first buckle mechanism. The upper end of the top rod is fixedly installed on the third push plate, the lower end of the first limit post is fixedly installed on the first push plate, and the lower end of the second limit post (20) is fixedly installed on the second push plate.

[0010] The beneficial effects of the present invention are as follows: The three-stage demolding mechanism of the double-walled reagent bottle injection mold achieves smooth demolding of the inner wall protrusion of the double-walled reagent bottle through three demolding stages. The three demolding stages are designed to split the demolding force into three components that act on the double-walled reagent bottle during injection molding, avoiding product dragging or breakage and other quality defects caused by excessive demolding force, thereby improving the mass production capability and mold life of the injection mold. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a double-walled reagent bottle.

[0012] Figure 2 for Figure 1 BB-direction sectional view.

[0013] Figure 3 This is a schematic diagram of the overall structure of an injection mold for a double-walled reagent bottle.

[0014] Figure 4 This is a schematic diagram of a partial structure of an injection mold (without a front template).

[0015] Figure 5 This is a schematic diagram of a partial structure of an injection mold (without front and rear templates).

[0016] Figure 6 This is a schematic diagram of a partial structure of an injection mold (without front and rear templates and a fourth push plate).

[0017] Figure 7 This is a schematic diagram of a partial structure of an injection mold (without front and rear templates and the third and fourth push plates).

[0018] Figure 8 for Figure 7 Top view.

[0019] Figure 9 for Figure 8 A sectional view along the AA direction.

[0020] Figure 10 This is a schematic diagram of a partial structure of an injection mold.

[0021] Figure 11 This is a schematic diagram of a partial structure of an injection mold (without front and rear templates and push plate mechanism).

[0022] Figure 12 This is a schematic diagram of the first fastening mechanism of an injection mold.

[0023] Figure 13 This is a partial structural diagram of the first buckle mechanism of an injection mold (without the first buckle base).

[0024] Figure 14 This is a schematic diagram of the second buckling mechanism of the injection mold.

[0025] The components are as follows: 1. Double-walled round reagent bottle; 2. Angled ejector; 3. Sleeve ejector; 4. Sleeve ejector pin; 5. Angled ejector seat; 6. Angled ejector slider; 7. Sleeve ejector pin fixing strip; 8. Pressure block; 9. Front template; 10. Rear template; 11. Rear mold core; 12. Square iron; 13. Base plate; 14. First push plate; 15. Second push plate; 16. Third push plate; 17. Fourth push plate; 18. Ejector roller; 19. First limiting post; 20. Second limiting post; 21. First locking base; 22. First locking ejector rod; 23. First locking pull rod; 24. First locking slider; 25. First locking spring; 26. Second locking base; 27. Second locking ejector rod; 28. Second locking pull rod; 29. ​​Second locking slider; 30. Second locking spring. Detailed Implementation

[0026] As attached Figures 1-12 As shown, a three-stage demolding mechanism for a double-walled reagent bottle injection mold includes a double-walled reagent bottle 1, an inclined ejector 2, an ejector sleeve 3, an ejector pin 4, an inclined ejector seat 5, an inclined ejector slider 6, an ejector pin fixing strip 7, a pressure block 8, a front template 9, a rear template 10, a rear mold core 11, a square iron 12, a base plate 13, a first push plate 14, a second push plate 15, a third push plate 16, a fourth push plate 17, an ejector roller 18, a first limiting post 19, a second limiting post 20, a first locking base 21, a first locking ejector rod 22, a first locking pull rod 23, a first locking slider 24, a first locking spring 25, a second locking base 26, a second locking ejector rod 27, a second locking pull rod 28, a second locking slider 29, and a second locking spring 30. The three-stage demolding mechanism of the injection mold includes a cavity system, an inclined ejector mechanism, an ejector sleeve mechanism, a push plate mechanism, and a limiting system.

[0027] As attached Figures 1-2 As shown, the double-walled reagent bottle 1 is a double-walled injection molded product with a double-walled structure. There are protruding fasteners on the inner side wall of the outer wall. When the injection molding is completed and the product is demolded, it is necessary to control the action sequence of the injection mold inclined ejector mechanism and the ejector mechanism to reserve space for the demolding of the fastener part of the double-walled reagent bottle 1. The mold opening action of the injection mold includes three stages.

[0028] As attached Figures 3-14The images show the state of the mold mechanism when the injection mold is closed and the injection is completed. After the double-walled reagent bottle 1 is injection molded, the front mold plate 9 moves upward and separates from the rear mold plate 10. In the first stage of the three demolding, the ejector roller 18 moves upward and drives the first push plate 14, the second push plate 15, the third push plate 16 and the fourth push plate 17 to move upward together. In this stage, the inclined ejector 2 moves obliquely upward along the oblique guide groove opened on the front mold plate 10, driving the double-walled reagent bottle 1 to move upward. Due to the horizontal component of the oblique upward movement, the inclined ejector 2 moves to the left and right sides relative to the double-walled reagent bottle 1. The left and right sides of the inclined ejector 2 separate from the double-walled reagent bottle 1. The outer circular outer wall of the left and right sides of the double-walled reagent bottle 1 separates from the inclined ejector 2, leaving deformation space for the separation of the inner circular part of the outer circle of the double-walled reagent bottle 1.

[0029] In the second stage of the three demolding processes, the ejector roller 18 continues to move upward, driving the second push plate 15, the third push plate 16, and the fourth push plate 17 to move upward together. The protruding inclined surface at the upper end of the first locking ejector rod 22 pushes the first locking slide block 24 to move horizontally to the right. The locking position at the bottom of the first locking pull rod 23 disengages from the first locking slide block 24. The first locking pull rod 23 moves upward relative to the first locking base 24. The first push plate 14 moves downward relative to the second push plate 15, the third push plate 16, and the fourth push plate 17. The first push plate 14 drives the ejector sleeve 3 to move downward relative to the second push plate 15, the third push plate 16, and the fourth push plate 17. The double-walled reagent bottle 1, the angled ejector 2, and the ejector pin 4 move downwards, allowing the ejector pin 3 to detach from the middle of the inner and outer circular walls of the double-walled reagent bottle 1. In the first stage of the three-stage demolding process, the space between the angled ejector 2 and the left and right sides of the double-walled reagent bottle 1 provides space for the ejector pin 3 to detach from the protruding snap-fit ​​of the outer inner wall of the double-walled reagent bottle 1, thus preventing the snap-fit ​​part from being dragged or broken during demolding. At the end of the second stage of demolding, the top of the first limiting post 19 contacts the bottom of the rear template 10.

[0030] In the third stage of the three demolding processes, the ejector roller 18 continues to move upward, driving the third push plate 16 and the fourth push plate 17 to move upward. The protruding inclined surface at the upper end of the second snap-fit ​​ejector rod 27 pushes the second snap-fit ​​slider 29 to move horizontally to the right. The snap-fit ​​at the bottom of the second snap-fit ​​pull rod 28 disengages from the second snap-fit ​​slider 29. The second snap-fit ​​pull rod 28 moves upward relative to the second snap-fit ​​base 26. The second push plate 15 moves downward relative to the third push plate 16 and the fourth push plate 17, driving the ejector pin fixing strip 17 to move downward. The ejector pin fixing strip 17 drives the ejector pin 4 to move downward relative to the double-walled reagent bottle 1 and the inclined ejector 2. The ejector pin 4 disengages from the double-walled reagent bottle 1. At the end of the third demolding process, the top of the second limiting post 20 contacts the bottom of the rear template 10. At this time, the double-walled reagent bottle 1 is completely ejected from the injection mold cavity, and one cycle of injection molding production is completed.

[0031] A three-stage demolding mechanism for a double-walled reagent bottle injection mold achieves three-stage demolding of the double-walled product through the coordination and movement sequence control of the injection mold cavity system, inclined ejector mechanism, ejector sleeve mechanism, push plate mechanism and limiting system. This reduces the demolding force during the demolding process of the injection molded product, effectively demolds the protruding fasteners on the inner sidewall of the inner circle, and avoids the problem of dragging or breaking of the injection molded product during the injection molding production process.

[0032] The above description represents a preferred embodiment of the present invention and is intended to illustrate the content and concept of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A three-stage demolding mechanism for a double-walled reagent bottle injection mold, comprising a double-walled reagent bottle (1), an inclined ejector (2), an ejector sleeve (3), an ejector pin (4), an inclined ejector seat (5), an inclined ejector slider (6), an ejector pin fixing strip (7), a pressure block (8), a front template (9), a rear template (10), a rear mold core (11), a square iron (12), a base plate (13), a first push plate (14), a second push plate (15), a third push plate (16), a fourth push plate (17), an ejector roller (18), a first limiting post (19), a second limiting post (20), a first locking base (21), a first locking ejector rod (22), a first locking pull rod (23), a first locking slider (24), a first locking spring (25), a second locking base (26), a second locking ejector rod (27), a second locking pull rod (28), a second locking slider (29), and a second locking spring (30), characterized in that, The injection mold three-stage demolding mechanism includes a cavity system, an inclined ejector mechanism, an ejector sleeve mechanism, a push plate mechanism, and a limiting system; The double-walled reagent bottle (1) is a double-walled injection molded product with a raised buckle on the inner side wall of the outer wall. The cavity system includes a front mold plate (9), a rear mold plate (10), a rear mold core (11), an inclined ejector (2), an ejector sleeve (3), and an ejector pin (4). The rear mold core (11) is fixedly installed in a groove on the rear mold plate (10). The front mold plate (9) and the rear mold plate (10) are installed together. In the mold closed state, the front mold plate (9), the rear mold core (11), the inclined ejector (2), the ejector sleeve (3), and the ejector pin (4) together form the injection cavity of the double-walled reagent bottle (1). The inclined top mechanism includes an inclined top (2), an inclined top seat (5), and an inclined top slider (6). The inclined top (2) is installed in the inclined guide groove opened on the rear template (10) and can move obliquely up and down along the guide groove. The inclined top seat (5) is fixedly installed on the third push plate (16). The inclined top slider (6) is installed in the groove opened on the inclined top seat (5) and can slide left and right along the groove. The bottom end of the inclined top (2) is installed on the central rotating shaft of the inclined top slider (6). The ejector mechanism includes an ejector sleeve (3), an ejector needle (4), an ejector needle fixing strip (7), and a pressure block (8). The ejector needle (4) is fitted inside the ejector sleeve (3) and can slide up and down along the inner wall of the ejector sleeve (3). The lower end of the ejector sleeve (3) is fixedly installed on the first push plate (14). The ejector needle fixing strip (7) is fixedly installed in the groove opened on the ejector needle (4). The pressure block (8) is fixedly installed on the second push plate (15) and presses the ejector needle fixing strip (7) tightly onto the second push plate (15). A square through hole with the same width as the ejector needle fixing strip (7) is opened on the ejector sleeve (3). The ejector needle fixing strip (7) can move up and down relative to each other along the square through hole on the ejector sleeve (3). The push plate mechanism includes a square iron (12), a base plate (13), a first push plate (14), a second push plate (15), a third push plate (16), and a fourth push plate (17). The square iron (12) is fixedly installed with the rear template (10) and the base plate (13). The first push plate (14), the second push plate (15), the third push plate (16), and the fourth push plate (17) are installed in parallel between the rear template (10) and the base plate (13). The first push plate (14), the second push plate (15), the third push plate (16), and the fourth push plate (17) can move up and down relative to the base plate (13) under the action of the top roller (18). The limiting system includes a top roller (18), a first limiting post (19), a second limiting post (20), a first locking mechanism, and a second locking mechanism. The first locking mechanism includes a first locking base (21), a first locking top rod (22), a first locking pull rod (23), a first locking slider (24), and a first locking spring (25). The second locking mechanism includes a second locking base (26), a second locking top rod (27), a second locking pull rod (28), a second locking slider (29), and a second locking spring (30). The first locking base (21) is fixedly installed on the second push plate (15), the first locking top rod (22) is fixedly installed on the base plate (13), the first locking pull rod (23) is fixedly installed on the third push plate (16) and the fourth push plate (17), and the first locking slider (24) and the first locking spring (25) are installed inside the first locking base (21). The first locking spring (25) is in a pre-tightened state. The first latching slider (24) can slide left and right along the horizontal groove opened in the first latching base (21) under the pressure of the protruding inclined surface at the top of the first latching top rod (22) and the first latching spring (25). When the first latching slider (24) slides to the right, the latching position of the first latching pull rod (23) disengages from the first latching slider (24). The second latching base (26) is fixedly installed on the second push plate (15), and the second latching top rod (27) is fixedly installed on the base plate (1). 3) The second buckle rod (28) is fixedly installed on the third push plate (16) and the fourth push plate (17). The structure of the second buckle slider (29) and the second buckle spring (30) inside the second buckle mechanism is the same as that of the first buckle mechanism. The upper end of the top rod (18) is fixedly installed on the third push plate (16). The lower end of the first limiting post (19) is fixedly installed on the first push plate (14). The lower end of the second limiting post (20) is fixedly installed on the second push plate (15).

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