Injection mold for nucleic acid detection magnetic bar sleeve

Abstract

The utility model relates to the technical field of nucleic acid detection magnetic bar sleeve production, in particular to an injection mold for a nucleic acid detection magnetic bar sleeve, which comprises a lower mold seat, a mold cavity and a workbench arranged on the lower mold seat, a bottom support and a main support arranged on the workbench, an air cylinder arranged on the main support, an ejection air cylinder arranged on the bottom support and an agent storage box arranged on the ejection air cylinder. A control box and an agent pump are arranged on the agent storage box, an agent conveying pipe is connected to the agent pump, an agent outlet head and a metering valve are arranged on the agent conveying pipe, an ejecting needle is arranged on the ejecting air cylinder, an upper die base is arranged on the air cylinder, a die core and a transverse sliding plate are arranged on the upper die base, a vertical sliding rod and a reinforcing rib are arranged on the transverse sliding plate, and a vertical guide opening and a side guide groove are formed in the main support. The situation that an injection molding finished product of the magnetic bar sleeve is scratched and abraded in the mold stripping process is avoided, it is guaranteed that the mold core can be accurately inserted into the lower mold cavity, and the stability of the mold core of the upper mold base when moving downwards is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of production of magnetic rod covers for nucleic acid detection, in particular to an injection mold for a magnetic rod cover for nucleic acid detection. Background Art

[0002] The magnetic rod sleeve used for nucleic acid detection usually refers to the magnetic separation sleeve used in molecular biology experiments, and its main body is generally made of injection molding.

[0003] After the injection molding of the magnetic rod sleeve for nucleic acid detection is completed, magnetic particles will be embedded in its body. During the nucleic acid extraction process, the magnetic particles can be used to capture and release the nucleic acid. The magnetic rod sleeve can help achieve magnetic separation and nucleic acid enrichment.

[0004] The finished injection-molded magnetic rod sleeve for nucleic acid testing is generally a cylindrical structure with a hollow cavity inside, and is generally injection-molded by an injection mold device.

[0005] At present, the existing injection molds for magnetic rod covers for nucleic acid testing have a relatively thin thickness of the injection-molded magnetic rod covers themselves. When the hard ejecting needle is ejecting the material from the mold, the injection-molded magnetic rod covers with relatively thin thickness will be scratched and worn, which will in turn affect the ejection quality of the injection-molded magnetic rod covers for nucleic acid testing.

[0006] In addition, since the injection molded product of the magnetic rod sleeve is relatively slender, the cylinder itself will be relatively slender, and the distance between the mold core and the mold cavity will be relatively far to facilitate the later demolding. Therefore, when the mold core is moved downward and inserted into the mold cavity by only a single slender cylinder, it is easy to shake, and then the mold core cannot be accurately inserted into the lower mold cavity, which will affect the normal injection molding effect of the magnetic rod sleeve in the later stage.

[0007] The above problems are widespread and urgently need to be improved. Utility Model Content

[0008] The purpose of the utility model is to solve the above-mentioned shortcomings in the prior art and to propose an injection mold for a nucleic acid detection magnetic rod sleeve.

[0009] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0010] An injection mold for a nucleic acid detection magnetic rod sleeve is designed, comprising a lower mold base, a mold cavity and a workbench are provided on the lower mold base, a bottom bracket and a main bracket are provided on the workbench, a cylinder is provided on the main bracket, a ejection cylinder and a storage box are provided on the bottom bracket, a control box and a suction pump are provided on the storage box, the suction pump is connected to a drug delivery tube, a drug delivery tube is provided with a discharge head and a metering valve, a ejection needle is provided on the ejection cylinder, an upper mold base is provided on the cylinder, a mold core and a cross slide are provided on the upper mold base, a vertical slide rod and a reinforcement rib are provided on the cross slide, and a vertical guide port and a side guide groove are provided on the main bracket.

[0011] Furthermore, the control box, the metering valve, and the extraction pump are electrically connected.

[0012] Furthermore, the drug delivery tube and the drug outlet head are a group, which are two groups symmetrical on the left and right. The end of the drug outlet head facing the ejection needle is a cone-shaped structure, and the preset inner hole of the drug outlet head is flush with the upper end surface of the ejection needle.

[0013] Furthermore, the ejector pin passes through the workbench and is slidably connected to the lower die base, and the ejector pin is made entirely of soft brass.

[0014] Furthermore, the horizontal slide plate and the vertical slide bar form a group, which are two groups symmetrical on the left and right. The horizontal slide plate is slidably engaged with the side guide groove, and the vertical slide bar is slidably engaged with the vertical guide opening. The top view cross-section of the vertical slide bar and the vertical guide opening is a square structure.

[0015] Furthermore, the reinforcing ribs are of a triangular structure as a whole, are made of hard alloy tungsten steel and are respectively welded between the horizontal sliding plate and the vertical sliding rod.

[0016] Furthermore, a smooth layer is provided in the inner groove wall of the side guide groove, and the smooth layer is made of a graphite powder density coating layer and has a thickness of thirty to forty microns.

[0017] The invention provides a nucleic acid detection magnetic rod sleeve injection mold, which has the following beneficial effects:

[0018] 1. The utility model provides a ejection needle made of a relatively soft material, a symmetrical quantitative extraction pump and a drug delivery tube structure with a discharge head, so that the lubricant can be quantitatively injected into the top surface of the ejection needle during ejection. At the same time, the ejection needle structure made of a relatively soft material improves the lubricity of the top surface of the ejection needle and the soft contact during ejection, thereby avoiding scratches and wear on the injection-molded product of the thinner magnetic rod sleeve caused by the hard ejection needle during ejection, thereby ensuring the demolding quality of the injection-molded product of the magnetic rod sleeve for nucleic acid testing.

[0019] 2. The utility model symmetrically arranges a vertical guide sliding structure and a lateral guide sliding structure on the upper mold base, thereby avoiding the situation where the mold core is easily shaken when it is moved downward and inserted into the mold cavity by only a single slender cylinder, thereby ensuring that the mold core can be accurately inserted into the lower mold cavity and ensuring the normal injection molding effect of the subsequent magnetic rod sleeve.

[0020] 3. The utility model improves the structural stability between the transverse slide plate and the vertical slide bar by symmetrically arranging the reinforcing rib structure between the transverse slide plate and the vertical slide bar, and further ensures the stability of the mold core of the upper mold base when it moves downward. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a first-view stereoscopic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a stereoscopic diagram of the overall structure of the utility model from a second viewing angle;

[0023] Figure 3 For the utility model Figure 1 A partial enlarged view of the middle part;

[0024] Figure 4 It is a schematic diagram of the overall structure of the utility model from top view;

[0025] Figure 5 For the utility model Figure 4 Middle BB cross-section;

[0026] Figure 6 It is a block diagram of the utility model.

[0027] In the figure: 1 lower die base; 11 die cavity; 2 workbench; 3 main bracket; 31 vertical guide port; 32 side guide groove; 33 smooth layer; 4 cylinder; 41 upper die base; 42 die core; 5 horizontal slide plate; 51 vertical slide rod; 52 reinforcing rib; 6 bottom bracket; 61 ejection cylinder; 62 ejection needle; 7 agent storage box; 70 control box; 71 agent pump; 72 metering valve; 8 agent delivery pipe; 81 agent discharge head. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] Reference Figure 1-6The injection mold for the nucleic acid detection magnetic rod sleeve comprises a lower mold base 1, a mold cavity 11 and a workbench 2 are provided on the lower mold base 1, a bottom bracket 6 and a main bracket 3 are provided on the workbench 2, a cylinder 4 is provided on the main bracket 3, a top-loading cylinder 61 and a storage box 7 are provided on the bottom bracket 6, a control box 70 and a suction pump 71 are provided on the storage box 7, a drug delivery tube 8 is connected to the suction pump 71, a drug delivery tube 8 is provided with a discharge head 81 and a metering valve 72, a top-loading cylinder 61 is provided with a top-loading needle 62, an upper mold base 41 is provided on the cylinder 4, a mold core 42 and a horizontal slide plate 5 are provided on the upper mold base 41, a vertical slide rod 51 and a reinforcement rib 52 are provided on the horizontal slide plate 5, a vertical guide port 31 and a side guide groove 32 are provided on the main bracket 3, and the injection mold structures involved in this patent are all injection molds for nucleic acid detection magnetic rod sleeves, which are prior art. Some existing structures are not drawn and marked, and there is no need to repeat them.

[0030] In detail, the control box 70, the metering valve 72, and the extraction pump 71 are electrically connected. A PLC is preset in the control box 70. The metering value of the lubricant extraction can be preset on the PLC. Then the PLC will control the metering valve 72 and extract a certain amount of lubricant to the delivery tube 8.

[0031] Furthermore, the agent delivery tube 8 and the agent outlet head 81 are a group, which are two symmetrical groups in total. The end of the agent outlet head 81 facing the ejection needle 62 is a cone-shaped structure. The preset inner hole of the agent outlet head 81 is flush with the upper end surface of the ejection needle 62. Combined with the cone-shaped structure, it is ensured that the injected lubricant is evenly sprayed on the top surface of the ejection needle 62.

[0032] Furthermore, the ejector needle 62 passes through the workbench 2 and is slidably connected with the lower mold base 1. The ejector needle 62 is made of soft brass as a whole. The brass body is relatively soft, and combined with the injected lubricant, the lubricity of the top surface of the ejector needle 62 and the soft contact during ejection are improved.

[0033] In more detail, the horizontal slide plate 5 and the vertical slide bar 51 are a group, which are two groups symmetrical on the left and right. The horizontal slide plate 5 is slidably engaged with the side guide groove 32, and the vertical slide bar 51 is slidably engaged with the vertical guide opening 31. The top view of the vertical slide bar 51 and the vertical guide opening 31 is a square structure to prevent the vertical slide bar 51 from rotating in the vertical guide opening 31.

[0034] In general, the reinforcing rib 52 is a triangular structure as a whole. The reinforcing rib 52 is made of cemented carbide tungsten steel and is welded between the horizontal slide plate 5 and the vertical slide bar 51 respectively. The triangular structure has strong stability, and combined with the high strength and deformation resistance of the cemented carbide tungsten steel material, the structural stability between the horizontal slide plate 5 and the vertical slide bar 51 is improved.

[0035] Finally, a smoothing layer 33 is provided in the inner groove wall of the side guide groove 32. The smoothing layer 33 is made of a graphite powder density coating layer with a thickness of thirty to forty microns. The surface of the graphite powder density coating layer is flat and smooth and durable, which further improves the smoothness of the vertical sliding of the cross slide plate 5.

[0036] Working method: a certain amount of soft injection liquid (existing technology) is injected into the mold cavity 11 of the lower mold base 1, and then the cylinder 4 is started to drive the mold core 42 to move downward and insert it into the mold cavity 11. After cooling and solidification, the mold core 42 is withdrawn and reset upward by the cylinder 4, and then the material is ejected.

[0037] At this time, the extraction pump 71 is started first, and the extraction pump 71 will extract the lubricant in the storage box 7. At this time, the PLC in the control box 70 will control the metering valve 72 to accurately inject a certain amount of lubricant according to the preset dosage through the delivery tube 8 and the dispensing head 81 onto the upper end surface of the ejection needle 62, and then start the ejection cylinder 61 to drive the ejection needle 62 to move upward and eject the magnetic rod sleeve injection molded product that has been cooled and condensed in the mold cavity 11 upward. Finally, the staff can take it out, thereby realizing the quantitative injection of lubricant to the top surface of the ejection needle 62. At the same time, a ejection needle 62 structure made of a softer material is set to improve the lubricity of the top surface of the ejection needle 62 and the soft contact during ejection, thereby avoiding the hard ejection needle 62 from scratching and wearing the injection molded product of the thinner magnetic rod sleeve when ejecting the material from the mold, thereby ensuring the ejection quality of the injection molded product of the magnetic rod sleeve for nucleic acid detection.

[0038] Moreover, when the mold core 42 moves downward, it will drive the horizontal slide plate 5 to slide along the side guide groove 32, and at the same time drive the vertical slide rod 51 to slide along the vertical guide port 31, thereby avoiding the situation where the mold core 42 is easily shaken when it is moved downward and inserted into the mold cavity 11 by only a single slender cylinder 4, thereby ensuring that the mold core 42 can be accurately inserted into the lower mold cavity 11, ensuring the normal injection molding effect of the subsequent magnetic rod sleeve.

[0039] In addition, by symmetrically arranging the reinforcing rib 52 structure between the transverse slide plate 5 and the vertical slide rod 51, the structural stability between the transverse slide plate 5 and the vertical slide rod 51 is improved, and the stability of the mold core 42 of the upper mold base 41 when moving downward is further ensured.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An injection mold for a nucleic acid detection magnetic rod sleeve, comprising a lower mold base (1), characterized in that: The lower die base (1) is provided with a die cavity (11) and a workbench (2); the workbench (2) is provided with a bottom bracket (6) and a main bracket (3); the main bracket (3) is provided with a cylinder (4); the bottom bracket (6) is provided with a material ejection cylinder (61) and a reagent storage box (7); the reagent storage box (7) is provided with a control box (70) and a reagent extraction pump (71); the reagent extraction pump (71) is connected to a reagent delivery pipe (8); the reagent delivery pipe (8) is connected to the reagent delivery pipe (8); The tube (8) is provided with a dispensing head (81) and a metering valve (72), the ejection cylinder (61) is provided with an ejection needle (62), the cylinder (4) is provided with an upper mold base (41), the upper mold base (41) is provided with a mold core (42) and a horizontal slide plate (5), the horizontal slide plate (5) is provided with a vertical slide rod (51) and a reinforcing rib (52), and the main bracket (3) is provided with a vertical guide port (31) and a side guide groove (32).

2. The injection mold for the magnetic rod sleeve for nucleic acid detection according to claim 1, characterized in that: The control box (70), the metering valve (72), and the agent extraction pump (71) are electrically connected.

3. The injection mold for the nucleic acid detection magnetic rod sleeve according to claim 1, characterized in that: The drug delivery tube (8) and the drug outlet head (81) form a group, which are two groups symmetrical on the left and right. The end of the drug outlet head (81) facing the ejection needle (62) is a cone-shaped structure, and the preset inner hole of the drug outlet head (81) is flush with the upper end surface of the ejection needle (62).

4. The injection mold for the nucleic acid detection magnetic rod sleeve according to claim 1, characterized in that: The ejector pin (62) passes through the workbench (2) and is slidably connected to the lower die base (1); the ejector pin (62) is made entirely of soft brass.

5. The injection mold for the nucleic acid detection magnetic rod sleeve according to claim 1, characterized in that: The horizontal slide plate (5) and the vertical slide bar (51) form a group, which are two groups symmetrical on the left and right. The horizontal slide plate (5) is slidably engaged with the side guide groove (32), and the vertical slide bar (51) is slidably engaged with the vertical guide opening (31). The top view cross section of the vertical slide bar (51) and the vertical guide opening (31) is a square structure.

6. The injection mold for the nucleic acid detection magnetic rod sleeve according to claim 1, characterized in that: The reinforcing rib (52) is a triangular structure as a whole. The reinforcing rib (52) is made of hard alloy tungsten steel and is respectively welded between the horizontal slide plate (5) and the vertical slide bar (51).

7. The injection mold for the nucleic acid detection magnetic rod sleeve according to claim 1, characterized in that: A smooth layer (33) is arranged in the inner groove wall of the side guide groove (32), and the smooth layer (33) is made of a graphite powder density coating layer and has a thickness of thirty to forty micrometers.

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