Nucleic acid detection magnetic rod stirring sleeve injection mold

Abstract

The present invention provides a nucleic acid detection magnetic bar stirring sleeve injection mold, including a fixed mold base plate, a hot runner fixed plate, a material shifting plate, a cavity fixed plate, a push plate, a core fixed plate and a movable mold base plate, a plurality of cavity inserts are arranged in the cavity fixed plate, a push plate insert corresponding to the cavity insert is arranged in the push plate, a core insert corresponding to the push plate insert is arranged in the core fixed plate, a hot runner plate is arranged in the hot runner fixed plate, a feed port is arranged on the fixed mold base plate, a material dividing plate, a cavity insert, a push plate insert and a core insert are surrounded by a plurality of independent product filling areas, a material channel is provided on the upper surface of the cavity fixed plate, a diversion material channel is provided on the upper surface of the material dividing plate, two injection molding channels connecting the top two sides of the product filling area are arranged at the diversion material channel, a plurality of pull pins are arranged on the material shifting plate, and the bottom of the pull pins is located in the diversion material channel. The present invention has high injection molding efficiency, good product quality, and an ideal magnetic force distribution when the product is used in combination with a magnetic bar.

Description

Technical Field

[0001] The invention relates to an injection mold, in particular to an injection mold for a magnetic rod stirring sleeve for nucleic acid detection. Background Art

[0002] The stirring sleeve is an experimental instrument frequently used in chemical laboratories or biological research laboratories to accelerate the separation of materials in chemical experiments or biological experiments. The magnetic rod stirring sleeve in the existing nucleic acid extractor aggregates the magnetic beads on the stirring sleeve outside the magnetic rod, and the magnetic beads are transferred from the sample lysate, washing solution, and elution solution by moving the stirring sleeve, thereby completing the automated nucleic acid extraction process. The advantage of the magnetic rod method is that there is no liquid residue in each step, and the magnetic rod only attracts the magnetic beads and transfers them to the holes of the next reaction step. The magnetic rod method avoids the residual washing solution as much as possible, and the extracted nucleic acid product has a better quality.

[0003] Existing stirring sleeves are all produced by injection molding, and their gates are usually set at the top center or the middle outer side of the stirring sleeve. When set at the top center, it affects the stirring function, and when set at the middle outer side, it affects the mixing, transfer, and elution, and the mixing, transfer, and purification efficiency is not high. The above two types of gates lead to unsatisfactory product quality, resulting in unsatisfactory magnetic rod binding and magnetic force distribution. Summary of the invention

[0004] In view of the above problems, the present invention aims to provide an injection mold for a nucleic acid detection magnetic rod stirring sleeve, which can ensure good quality of the product after injection molding, and has ideal combination with the magnetic rod and magnetic force distribution by arranging the inlet gate on both sides of the parting surface of the stirring sleeve.

[0005] The technical solution of the present invention is an injection mold for a nucleic acid detection magnetic rod stirring sleeve, comprising a fixed mold base plate, a hot runner fixed plate, a material stripping plate, a cavity fixed plate, a push plate, a core fixed plate and a movable mold base plate, wherein the cavity fixed plate is provided with a plurality of cavity inserts and a dividing plate located on the top surface of the cavity insert, the push plate is provided with a push plate insert corresponding to the cavity insert, the core fixed plate is provided with a core insert corresponding to the push plate insert, the hot runner fixed plate is provided with a hot runner plate, the hot runner plate is provided with a heating ring, the fixed mold base plate is provided with a feed port, the dividing plate, the cavity insert , push plate inserts and core inserts form several independent product filling areas, the upper surface of the cavity fixing plate is provided with a material channel, the upper surface of the dividing plate is provided with multiple diversion channels, the front end of the diversion channel is connected with the material channel, and the last level of the diversion channel is provided with two injection channels that penetrate the dividing plate and connect to the top two sides of the product filling area respectively. The two injection channels correspond to one product filling area in the cavity insert, and multiple diversion channels extend from the hot runner plate to the material channel on the upper surface of the cavity fixing plate. Multiple pulling pins are provided on the material diverting plate, and the bottom of the pulling pins is located in the diversion channel.

[0006] Preferably, the bottom of the diverter channel is located in the middle of the channel, and cavity inserts and dividing plates are provided at both ends of the channel. The front end of the diverter channel on the dividing plate is connected to the channel, and the rear end is divided into two to form a first-level diverter channel. The rear end of the first-level diverter channel is divided into two to form a second-level diverter channel. The rear end of the second-level diverter channel is divided into two to form a third-level diverter channel. The third-level diverter channel extends injection channels to both sides.

[0007] Preferably, the top of the hot runner plate is connected to the feed inlet, and the bottom is divided into four diversion channels.

[0008] Preferably, a pulling pin plate is provided on the top of the pulling pin, and the pulling pin plate is connected to the top of the tapping plate.

[0009] Preferably, a heating module is provided on the outer side of the hot runner fixing plate.

[0010] Preferably, locking modules are provided on the outer sides of the core fixing plate and the cavity fixing plate.

[0011] The present invention arranges the gate on both sides of the parting surface at the bottom of the stirring sleeve, so that the plastic has good fluidity and fast flow speed during the injection molding process, and the product quality is good. The magnetic force distribution of the molded product is ideal when used in combination with the magnetic rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the product structure of the present invention;

[0013] Figure 2 It is a structural schematic diagram of the present invention;

[0014] Figure 3 It is a partial cross-sectional view of the present invention;

[0015] Figure 4 It is a schematic diagram of the structure among the hot runner plate, the flow distribution channel, the cavity fixing plate, the material distribution plate, the cavity insert, the push plate insert, and the core insert in the present invention;

[0016] Figure 5 for Figure 4 A schematic diagram of the structure from another perspective;

[0017] Figure 6 for Figure 4 A top view of

[0018] Figure 7 for Figure 6 A partial cross-sectional view along the direction perpendicular to the center lines of the two injection channels;

[0019] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0020] Fig. 9 It is a schematic diagram of the structure of the material-diverting plate, the material-pulling pin plate, the material-pulling pin and the material-dividing plate in the present invention;

[0021] Fig.10 for Fig. 9 A schematic diagram of the structure from another perspective;

[0022] Fig.11 It is a structural schematic diagram of the material pulling pin plate, material pulling pin, material dividing plate and stirring sleeve products in the present invention;

[0023] Fig.12 for Fig.11 A schematic diagram of the structure from another perspective;

[0024] Among them: 1—fixed mold base plate; 2—hot runner fixed plate; 3—material stripper plate; 4—cavity fixed plate; 5—push plate; 6—core fixed plate; 7—movable mold base plate; 8—cavity insert; 81—material separator plate; 9—push plate insert; 10—core insert; 11—hot runner plate; 12—feed port; 13—product filling area; 14—material channel; 15—diverter channel; 151—first-level diverter channel; 152—second-level diverter channel; 153—third-level diverter channel; 16—injection channel; 17—diverter channel; 18—pulling pin; 19—pulling pin plate; 20—heating module; 21—locking module. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0026] like Figures 1 to 12As shown, the present invention provides an injection mold for a nucleic acid detection magnetic rod stirring sleeve, comprising a fixed mold base plate 1, a hot runner fixed plate 2, a material stripping plate 3, a cavity fixed plate 4, a push plate 5, a core fixed plate 6 and a movable mold base plate 7, wherein the cavity fixed plate 4 is provided with a plurality of cavity inserts 8 and a dividing plate 81 located on the top surface of the cavity insert 8, the push plate 5 is provided with a push plate insert 9 corresponding to the cavity insert 8, the core fixed plate 6 is provided with a core insert 10 corresponding to the push plate insert 9, the hot runner fixed plate 2 is provided with a hot runner plate 11, the hot runner plate 11 is provided with a heating ring, the fixed mold base plate 1 is provided with a feed port 12, the dividing plate 81, the cavity insert 8, the push plate insert 9 and The core insert 10 surrounds a number of independent product filling areas 13, the upper surface of the cavity fixing plate 4 is provided with a material channel 14, and the upper surface of the dividing plate 81 is provided with a multi-stage diversion channel 15. The front-end diversion channel 15 is connected to the channel 14, and the last-stage diversion channel 15 is provided with two injection channels 16 that penetrate the dividing plate 81 and connect to the two sides of the top of the product filling area 13. The two injection channels 16 correspond to a product filling area 13 in the cavity insert 8. A plurality of diversion channels 17 extend from the hot runner plate 11 to the material channel 14 on the upper surface of the cavity fixing plate 4. A plurality of pulling pins 18 are provided on the material shifting plate 3, and the bottom of the pulling pins 18 is located in the diversion channel 15.

[0027] Preferably, the bottom of the diverter channel 17 is located in the middle of the material channel 14, and cavity inserts 8 and dividing plates 81 are provided at both ends of the material channel 14. The front end of the diverter channel 15 on the dividing plate 81 is connected to the material channel 14, and the rear end is divided into two to form a first-level diverter channel 151. The rear end of the first-level diverter channel 151 is divided into two to form a second-level diverter channel 152. The rear end of the second-level diverter channel 152 is divided into two to form a third-level diverter channel 153. The third-level diverter channel 153 extends the injection channel 16 to both sides.

[0028] Preferably, the top of the hot runner plate 11 is connected to the feed port 12 , and the bottom is divided into four diversion channels 17 .

[0029] Preferably, a pulling pin plate 19 is provided on the top of the pulling pin 18 , and the pulling pin plate 19 is connected to the top of the material removing plate 3 .

[0030] Preferably, a heating module 20 is provided on the outer side of the hot runner fixing plate 2 to ensure that the hot runner plate 11 and the diverter channel 17 remain in a heated state.

[0031] Preferably, the outer side surfaces of the core fixing plate 6 and the cavity fixing plate 4 are provided with locking modules 21 to facilitate the pressure bearing during the injection molding process.

[0032] The present invention changes the inlet position of the existing magnetic rod stirring sleeve, designs a new mold structure, realizes multiple products through multiple diverter channels 17 and multi-stage diverter channels 15, and sets two injection channels 16 that penetrate the dividing plate 81 and connect the top two sides of the product filling area 13 at the last stage of the diverter channel 15. The molten plastic enters from the feed port 12, enters the hot runner plate 11, passes through multiple diverter channels 17 and reaches the channel 14, enters the diverter channels 15 of the dividing plates 81 on both sides, and enters the product filling area 13 through the injection channel 16 after passing through multiple diverter channels 15, and injects several products at one time. Among them, the hot runner plate 11 and the diverter channel 17 are hot runners, and the raw materials inside are always in a molten state. The diverter channel 15 in the cavity insert 8 is a cold runner, which is convenient for the conformal water channel after injection to make the product cool faster and improve the injection efficiency. A pulling pin plate 19 and a plurality of pulling pins 18 are correspondingly arranged above the diverter channel 15. When the mold is opened, the cavity fixing plate and the push plate, as well as the material removal plate and the cavity fixing plate are separated. When the product is taken out, the cooled raw material in the diverter channel 15 is also taken out for the next injection molding.

[0033] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A nucleic acid detection magnetic bar stirring sleeve injection mold, characterized in that: The invention comprises a fixed mold base plate (1), a hot runner fixed plate (2), a material stripping plate (3), a cavity fixed plate (4), a push plate (5), a core fixed plate (6) and a movable mold base plate (7); the cavity fixed plate (4) is provided with a plurality of cavity inserts (8) and a material distribution plate (81) located on the top surface of the cavity insert (8); the push plate (5) is provided with a push plate insert (9) corresponding to the cavity insert (8); the core fixed plate (6) is provided with a core insert (10) corresponding to the push plate insert (9); the hot runner fixed plate (2) is provided with a hot runner plate (11); a heating ring is provided on the hot runner plate (11); the fixed mold base plate (1) is provided with a material feed port (12); the material distribution plate (81), the cavity insert (8), the push plate insert (9) and the core insert (10) form a A plurality of independent product filling areas (13) are provided, the upper surface of the cavity fixing plate (4) is provided with a material channel (14), the upper surface of the dividing plate (81) is provided with a plurality of diversion channels (15), the frontmost diversion channel (15) is connected to the channel (14), the last diversion channel (15) is provided with two injection channels (16) which penetrate the dividing plate (81) and are connected to the top two sides of the product filling area (13), the two injection channels (16) correspond to a product filling area (13) in the cavity insert (8), a plurality of diversion channels (17) extend from the hot runner plate (11) to the channel (14) on the upper surface of the cavity fixing plate (4), a plurality of pulling pins (18) are provided on the material shifting plate (3), and the bottom of the pulling pins (18) is located in the diversion channel (15).

2. The nucleic acid detection magnetic rod stirring sleeve injection mold according to claim 1, characterized in that: The bottom of the diverter channel (17) is located in the middle of the material channel (14), and the left and right ends of the material channel (14) are provided with cavity inserts (8) and a dividing plate (81). The front end of the diverter channel (15) on the dividing plate (81) is connected to the material channel (14), and the rear end is split into two to form a primary diverter channel (151). The rear end of the primary diverter channel (151) is split into two to form a secondary diverter channel (152). The rear end of the secondary diverter channel (152) is split into two to form a tertiary diverter channel (153). The tertiary diverter channel (153) extends to both sides to form an injection channel (16).

3. The nucleic acid detection magnetic rod stirring sleeve injection mold according to claim 2, characterized in that: The top of the hot runner plate (11) is connected to the feed port (12), and the bottom is divided into four diversion channels (17).

4. The nucleic acid detection magnetic rod stirring sleeve injection mold according to claim 1, characterized in that: A material pulling pin plate (19) is provided on the top of the material pulling pin (18), and the material pulling pin plate (19) is connected to the top of the material shifting plate (3).

5. The nucleic acid detection magnetic rod stirring sleeve injection mold according to claim 1, characterized in that: A heating module (20) is provided on the outer side of the hot runner fixing plate (2).

6. The nucleic acid detection magnetic rod stirring sleeve injection mold according to claim 1, characterized in that: Lock modules (21) are provided on the outer sides of the core fixing plate (6) and the cavity fixing plate (4).

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