Multi-cavity Precision All-heated Runner Suction Nozzle Mold

Abstract

The present invention discloses a multi-cavity precision full-hot runner pipette mold, comprising a front mold assembly and a rear mold assembly. The front mold assembly is located at the upper end of the rear mold assembly. A full-hot runner is provided inside the front mold assembly. Eight full-hot runner nozzles are provided on the full-hot runner. Eight mold cavities are arranged around the full-hot runner. The eight full-hot runner nozzles are connected to the interiors of the eight mold cavities. The rear mold assembly is provided with a core head that matches the mold cavity. The mold cavity is provided with a 3D-printed double-helix waterway for the front mold cavity. The present invention adopts a full-hot runner glue feeding method of 1 tube and 8 modules. Since the wall of the pipette tip is relatively thin, the full-hot runner is used to ensure that the material in the runner will not condense. The lack of runners reduces raw material loss. The full-hot runner glue feeding can adjust the glue flow rate and temperature control, so that the product obtains an effective glue amount balance during molding, ensuring the high precision of the product's concentricity and verticality.

Description

Technical Field

[0001] The present invention relates to mold-related fields, and in particular to a multi-cavity precision full-hot runner suction head mold. Background Art

[0002] The pipette tip is a disposable consumable that effectively forms a protective structure between the pipette and the sample to ensure the safety of sample aspiration and sample separation. During the production process, the pipette tip needs to be injection molded using a corresponding pipette tip mold.

[0003] The existing nozzle mold is inconvenient to operate during use. When injecting glue, the material in the flow channel is easily condensed, which is easy to block the material, affecting use and causing material waste. In addition, the existing nozzle mold has poor cooling effect during use, and the concentricity and verticality accuracy of the product is not high, resulting in poor quality of the injection molded product, which needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a multi-cavity precision full hot runner pipette tip mold to solve the above technical problems.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The multi-cavity precision full-hot runner suction head mold includes a front mold assembly and a rear mold assembly. The front mold assembly is located at the upper end of the rear mold assembly. A full-hot glue inlet pipe is provided inside the front mold assembly. Eight full-hot glue inlet nozzles are provided on the full-hot glue inlet pipe. Eight cavities are arranged around the full-hot glue inlet pipe. The eight full-hot glue inlet nozzles are respectively connected to the interior of the eight cavities. The rear mold assembly is provided with a core head matching the cavity. A front mold cavity 3D printed double-helix water channel is provided inside the cavity. Multiple core heads are provided with rear model core stretching nozzle water channels.

[0007] As a further preferred embodiment of the present technical solution: a plurality of the full-heat glue inlet pipes are provided, and the plurality of the full-heat glue inlet pipes have the same structure and are evenly distributed on the front mold assembly.

[0008] As a further preferred embodiment of the present technical solution: the front mold assembly includes a panel, a hot runner plate, a vacuum negative pressure and 3D printing water channel plate and a front mold cavity fixing plate, the hot runner plate is fixedly mounted on the panel, the vacuum negative pressure and 3D printing water channel plate is fixedly mounted on the hot runner plate, the front mold cavity fixing plate is fixedly mounted on the surface of the vacuum negative pressure and 3D printing water channel plate, the mold cavity is located in the front mold cavity fixing plate, one end of the full-heat glue inlet hose is connected to the inside of the hot runner plate, and the other end of the full-heat glue inlet hose extends into the front mold cavity fixing plate.

[0009] As a further preferred embodiment of the present technical solution: a vacuum negative pressure channel is provided on the vacuum negative pressure and 3D printing water channel plate, and one end of the vacuum negative pressure channel is connected to the interior of the mold cavity.

[0010] As a further preferred embodiment of the present technical solution: a 3D printed inlet and outlet water channel is provided on the vacuum negative pressure and 3D printed water channel plate, and the 3D printed inlet and outlet water channel is located at the upper end of the 3D printed double helix water channel of the front mold cavity, and the 3D printed double helix water channel of the front mold cavity includes a first spiral channel and a second spiral channel, and one end of the first spiral channel and the second spiral channel are both spirally wound on the mold cavity, and the other ends of the first spiral channel and the second spiral channel are respectively connected to the first inlet and outlet water pipe and the second inlet and outlet water pipe, and the first inlet and outlet water pipe and the second inlet and outlet water pipe are both located inside the 3D printed inlet and outlet water channel.

[0011] As a further preferred embodiment of the present technical solution: a core positioning insert is provided inside the front mold cavity fixing plate, and the core positioning insert is located at the top end inside the mold cavity.

[0012] As a further preferred embodiment of the present technical solution: the rear mold assembly includes a rear mold push sleeve fixing plate, a rear mold core fixing plate and a bottom plate from top to bottom, the rear mold push sleeve fixing plate is provided with a rear mold push plate sleeve, the core head is installed at the upper end of the rear mold push plate sleeve, and the core head and the rear mold push plate sleeve are integrated.

[0013] As a further preferred embodiment of the present technical solution: a core waterway inlet and outlet combined channel is provided at the bottom end of the base plate, a plurality of the rear model core stretching nozzle waterways are arranged on the rear model core fixing plate, and the bottom ends of the plurality of the rear model core stretching nozzle waterways are connected to the interior of the core waterway inlet and outlet combined channel.

[0014] The beneficial effects of the present invention are:

[0015] 1. The present invention adopts a full hot nozzle glue feeding method with 1 tube and 8 modules. Since the wall of the suction head is relatively thin, a full hot runner is adopted to ensure that the material in the runner will not condense, and the runner-free method reduces raw material loss. Through full hot glue feeding, the glue feeding flow and temperature control can be adjusted to ensure that the product obtains an effective glue amount balance during molding, ensuring high precision of product concentricity and verticality. In addition, the modular structure of full hot nozzle glue feeding is adopted, and different products can be easily switched by changing the core and cavity, saving 50% of the cost.

[0016] 2. The present invention forms the cavity through a 3D printed double-helix water channel, which can make the product cooled evenly, and by setting a core positioning insert, the concentric verticality range of the product can be better guaranteed.

[0017] 3. The present invention provides a vacuum negative pressure channel, which can effectively discharge the air in the mold cavity and the hot air generated by the heating of the raw material glue through the vacuum negative pressure channel during the injection molding process, ensuring that the product molding is free of defects such as glue shortage, bubbles and weld marks, and is also a good guarantee for the concentricity and verticality accuracy of the product.

[0018] 4. The present invention sets a rear mold core to stretch the nozzle water channel, and the connection of multiple sections of the nozzle with different diameters is formed by stretching in one go. Compared with traditional welding forming, it can reduce the calcification of water dirt at the nozzle welding port, which causes the nozzle water channel to be blocked, the core cannot be effectively cooled, and it can also cause the product to bend and form, and the uneven wall thickness affects the concentricity and verticality accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic structural diagram of the front mold assembly of the present invention;

[0021] Figure 3 This is a schematic structural diagram of the rear mold assembly of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the full-heat rubber inlet hose of the present invention;

[0023] Figure 5 This is a schematic diagram of the 3D printed double-helix water channel structure of the front mold cavity of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the vacuum negative pressure channel of the present invention;

[0025] Figure 7 This is a schematic diagram of the waterway structure of the rear mold core stretching nozzle of the present invention;

[0026] Figure markings: 1. Panel; 2. Hot runner plate; 3. Vacuum negative pressure and 3D printing water channel plate; 4. Front mold cavity fixing plate; 5. Back mold push sleeve fixing plate; 6. Back mold core fixing plate; 7. Bottom plate; 8. Vacuum negative pressure channel; 9. 3D printing water inlet and outlet channels; 10. Core positioning insert; 11. Front mold cavity 3D printing double spiral water channel; 12. Full-heat glue inlet hose; 13. Back mold push plate sleeve; 14. Back mold core stretching nozzle water channel; 15. Core water channel inlet and outlet combined channel; 16. Full-heat glue inlet nozzle; 17. Finished suction head; 18. First inlet and outlet water pipe; 19. Second inlet and outlet water pipe; 20. First spiral channel; 21. Second spiral channel; 22. Cavity; 23. Core head; 24. Front mold assembly; 25. Back mold assembly. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific embodiments and drawings. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without making any creative work are all within the scope of protection of the present invention.

[0028] Specific embodiments of the present invention are described below with reference to the accompanying drawings. Example

[0029] like Figure 1-7 As shown, the multi-cavity precision full-hot runner suction head mold of this embodiment includes a front mold assembly 24 and a rear mold assembly 25. The front mold assembly 24 is located at the upper end of the rear mold assembly 25. A full-hot glue feed pipe 12 is provided inside the front mold assembly 24. Eight full-hot glue feed nozzles 16 are provided on the full-hot glue feed pipe 12. Eight cavities 22 are provided around the full-hot glue feed pipe 12. The eight full-hot glue feed nozzles 16 are respectively connected to the interior of the eight cavities 22. The rear mold assembly 25 is provided with a core head 23 matching the cavity 22. The cavity 22 is provided with a front mold cavity 3D printed double helix water channel 11, and multiple core heads 23 are provided with rear model core stretching nozzle water channels 14.

[0030] In this embodiment, specifically: a plurality of full-heat glue inlet pipes 12 are provided, and the plurality of full-heat glue inlet pipes 12 have the same structure and are evenly distributed on the front mold assembly 24. By arranging a plurality of full-heat glue inlet pipes 12 on the front mold assembly 24, and surrounding a single full-heat glue inlet pipe 12 with a plurality of full-heat glue inlet nozzles 16 and a plurality of cavities 22, glue can be fed into the module by 1 tube 8 through the full-hot nozzle feeding method, without a runner, to reduce raw material loss.

[0031] In this embodiment, specifically: the front mold assembly 24 includes a panel 1, a hot runner plate 2, a vacuum negative pressure and 3D printing water channel plate 3 and a front mold cavity fixing plate 4, the hot runner plate 2 is fixedly installed on the panel 1, the vacuum negative pressure and 3D printing water channel plate 3 is fixedly installed on the hot runner plate 2, the front mold cavity fixing plate 4 is fixedly installed on the surface of the vacuum negative pressure and 3D printing water channel plate 3, the cavity 22 is located in the front mold cavity fixing plate 4, one end of the full hot glue feed pipe 12 is connected to the inside of the hot runner plate 2, and the other end of the full hot glue feed pipe 12 extends into the front mold cavity fixing plate 4, 8 cavities 22 can be connected to one full hot glue feed pipe 12, so that glue can be fed through a 1 tube 8 modules method. Since the wall of the suction head is relatively thin, the full hot runner used can ensure that the material in the flow channel will not condense.

[0032] A vacuum negative pressure channel 8 is provided on the vacuum negative pressure and 3D printing water channel plate 3. One end of the vacuum negative pressure channel 8 is connected to the interior of the cavity 22. During the injection molding process, the air in the mold cavity and the hot air generated by the heating of the raw material glue can be effectively discharged through the vacuum negative pressure channel 8 to ensure that the product molding will not have defects such as lack of glue, bubbles and welding marks.

[0033] In this embodiment, specifically: a 3D printed inlet and outlet water channel 9 is provided on the vacuum negative pressure and 3D printed water channel plate 3, and the 3D printed inlet and outlet water channel 9 is located at the upper end of the 3D printed double helix water channel 11 of the front mold cavity. The 3D printed double helix water channel 11 of the front mold cavity includes a first spiral channel 20 and a second spiral channel 21. One end of the first spiral channel 20 and the second spiral channel 21 are spirally wound on the mold cavity 22, and the other ends of the first spiral channel 20 and the second spiral channel 21 are respectively connected to the first inlet and outlet water pipe 18 and the second inlet and outlet water pipe 19. The first inlet and outlet water pipe 18 and the second inlet and outlet water pipe 19 are both located inside the 3D printed inlet and outlet water channel 9. By adopting a double helix water channel setting, the product cooling can be guaranteed to be balanced. At the same time, the double helix channel can increase or decrease the cooling effect, so that the cooling efficiency is high and the molding effect is good.

[0034] In this embodiment, specifically: a core positioning insert 10 is provided inside the front mold cavity fixing plate 4, and the core positioning insert 10 is located at the top of the cavity 22. By setting the core positioning insert 10, when the core head 23 is inserted into the cavity 22, the core positioning insert 10 can be used to position the core head 23, thereby ensuring that the product's concentricity and verticality accuracy are better.

[0035] In this embodiment, specifically: the rear mold assembly 25 includes a rear mold push sleeve fixing plate 5, a rear mold core fixing plate 6 and a bottom plate 7 from top to bottom, the rear mold push sleeve fixing plate 5 is provided with a rear mold push plate sleeve 13, the core head 23 is installed at the upper end of the rear mold push plate sleeve 13, and the core head 23 is integrated with the rear mold push plate sleeve 13.

[0036] In this embodiment, specifically: a core water channel inlet and outlet combination channel 15 is provided at the bottom end of the base plate 7, and multiple rear mold core stretching nozzle water channels 14 are provided on the rear mold core fixing plate 6. The bottom ends of the multiple rear mold core stretching nozzle water channels 14 are connected to the inside of the core water channel inlet and outlet combination channel 15. Cooling water can be delivered to the multiple rear mold core stretching nozzle water channels 14 through the core water channel inlet and outlet combination channel 15, so that the rear mold core stretching nozzle water channel 14 can be used to cool the inside of the core head 23, and then the inside of the finished suction tip 17 to be formed can be cooled.

[0037] It should be noted that, when the multi-cavity precision full hot runner suction head mold is working, the front mold assembly 24 and the rear mold assembly 25 can be matched and closed, and the core head 23 can be inserted into the cavity 22. When the core head 23 is inserted into the cavity 22, the core positioning insert 10 can be used to position the core head 23, thereby ensuring that the concentricity and verticality of the product are better. At this time, the glue can be fed through the full hot glue feeding pipe 12, and by connecting 8 cavities 22 with one full hot glue feeding pipe 12 to form a module, Therefore, the glue can be fed through the 1-tube 8-module mode, and the glue in a full-heat glue feeding pipe 12 is respectively fed into the interior of 8 mold cavities 22 through 8 full-heat glue feeding nozzles 16. Since the wall of the suction head is relatively thin, the full-hot runner is adopted to ensure that the material in the runner will not condense, and the runner-free method reduces the loss of raw materials. By feeding the glue with full heat, the glue feeding flow rate and temperature control can be adjusted; by setting the vacuum negative pressure channel 8, the air in the mold cavity and the heat generated by the heating of the raw glue can be effectively discharged through the vacuum negative pressure channel 8 during the injection molding process. The hot air is removed to ensure that the product molding does not have defects such as glue shortage, bubbles and weld marks. After the glue is added, cooling water can be sent into the first spiral channel 20 and the second spiral channel 21 through the first inlet and outlet water pipes 18 and the second inlet and outlet water pipes 19. The double spiral water channel 11 printed by the front mold cavity 3D is used to cool and dissipate heat on the outside of the mold cavity, which helps to form the suction tip finished product 17 inside the mold cavity. At the same time, cooling water can be sent to multiple rear mold core stretching nozzle water channels 14 through the core water channel inlet and outlet combined channel 15, so that the rear mold core stretching nozzle water channel 14 can be used to cool the inside of the core head 23, and then the inside of the suction tip finished product 17 to be formed can be cooled and cooled, accelerating the rapid molding of the suction tip finished product 17. By connecting the rear mold core stretching nozzle water channel 14 with multiple sections of different diameters and forming it in one stretch, compared with traditional welding molding, it can reduce the calcification of water quality dirt at the nozzle welding joint, causing the nozzle water channel to be blocked, the core cannot be effectively cooled, and it will also cause the product to be bent and uneven wall thickness, affecting the concentricity and verticality accuracy.

[0038] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. Multi-cavity precision full hot runner pipette tip mold, characterized by: The invention comprises a front mold component (24) and a rear mold component (25), wherein the front mold component (24) is located at the upper end of the rear mold component (25), a full-heat glue feeding pipe (12) is provided inside the front mold component (24), 8 full-heat glue feeding nozzles (16) are provided on the upper ring of the full-heat glue feeding pipe (12), 8 mold cavities (22) are provided around the full-heat glue feeding pipe (12), and the 8 full-heat glue feeding nozzles (16) are respectively connected to the interior of the 8 mold cavities (22), a core head (23) matching the mold cavity (22) is provided on the rear mold component (25), a front mold cavity 3D printing double spiral water channel (11) is provided inside the mold cavity (22), and a plurality of the core heads (23) are provided with rear mold core stretching nozzle water channels. The front mold assembly (24) comprises a panel (1), a hot runner plate (2), a vacuum negative pressure and 3D printing water channel plate (3) and a front mold cavity fixing plate (4), wherein the hot runner plate (2) is fixedly mounted on the panel (1), the vacuum negative pressure and 3D printing water channel plate (3) is fixedly mounted on the hot runner plate (2), the front mold cavity fixing plate (4) is fixedly mounted on the surface of the vacuum negative pressure and 3D printing water channel plate (3), the mold cavity (22) is located in the front mold cavity fixing plate (4), one end of the full heat glue feed pipe (12) is connected to the inside of the hot runner plate (2), and the other end of the full heat glue feed pipe (12) extends into the front mold cavity fixing plate (4); the vacuum A 3D printed water inlet and outlet channel (9) is provided on the negative pressure and 3D printed water channel plate (3), and the 3D printed water inlet and outlet channel (9) is located at the upper end of the front mold cavity 3D printed double helix water channel (11), and the front mold cavity 3D printed double helix water channel (11) includes a first spiral channel (20) and a second spiral channel (21), one end of each of the first spiral channel (20) and the second spiral channel (21) is spirally wound and arranged on the mold cavity (22), and the other ends of the first spiral channel (20) and the second spiral channel (21) are respectively connected to a first water inlet and outlet pipe (18) and a second water inlet and outlet pipe (19), and the first water inlet and outlet pipe (18) and the second water inlet and outlet pipe (19) are both located The interior of the 3D printing water inlet and outlet channel (9); the rear mold assembly (25) includes a rear mold push sleeve fixing plate (5), a rear mold core fixing plate (6) and a bottom plate (7) from top to bottom, the rear mold push sleeve fixing plate (5) is provided with a rear mold push plate sleeve (13), the core head (23) is installed on the upper end of the rear mold push plate sleeve (13), and the core head (23) and the rear mold push plate sleeve (13) are integrated; the bottom end of the bottom plate (7) is provided with a core waterway inlet and outlet combined channel (15), a plurality of the rear mold core stretching nozzle waterways (14) are provided on the rear mold core fixing plate (6), and the bottom ends of the plurality of the rear mold core stretching nozzle waterways (14) are connected to the inside of the core waterway inlet and outlet combined channel (15).

2. The multi-cavity precision full hot runner pipette tip mold according to claim 1, characterized in that: A plurality of the full-heat glue inlet pipes (12) are provided, and the plurality of the full-heat glue inlet pipes (12) have the same structure and are evenly distributed on the front mold assembly (24).

3. The multi-cavity precision full hot runner pipette tip mold according to claim 1, characterized in that: A vacuum negative pressure channel (8) is provided on the vacuum negative pressure and 3D printing waterway channel plate (3), and one end of the vacuum negative pressure channel (8) is in communication with the interior of the mold cavity (22).

4. The multi-cavity precision full hot runner pipette tip mold according to claim 1, characterized in that: A core positioning insert (10) is provided inside the front mold cavity fixing plate (4), and the core positioning insert (10) is located at the top end inside the mold cavity (22).

Images