Freezing pipe injection molding mold for biochemical sample storage

Abstract

The utility model provides a freezing pipe injection molding mold for biochemical sample storage, and belongs to the field of injection molds. The mold comprises a movable mold plate and a fixed mold plate, a plurality of upper sleeve shafts used for forming freezing pipes are arranged in the fixed mold plate, a plurality of lower sleeves corresponding to the upper sleeve shafts are arranged in the movable mold plate, the upper sleeve shafts can extend into the corresponding lower sleeves and form freezing pipe forming cavities during mold closing, an ejector rod is arranged at the bottom of each lower sleeve in a penetrating mode, and the ejector rods are connected with the upper sleeve shafts and the lower sleeve shafts. The mold is provided with a plurality of freezing pipe forming cavities, a plurality of freezing pipe plastic parts can be formed through one-time injection molding, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of injection molds, and in particular relates to an injection mold for cryogenic tubes for biochemical sample storage. Background Technology

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. It is widely used in industrial manufacturing. When using an injection mold, the raw material undergoes molding, cooling, and demolding within the mold to obtain the preliminary molded product. The performance of centrifuge tubes is generally determined by their wall thickness; the thinner the wall, the better the performance. Centrifuge tubes are commonly manufactured using injection molding. During injection molding, molten plastic flows through runners into the cavity of the injection mold and cools to solidify. In current technology, the number of tube forming cavities within the mold is relatively small, resulting in insufficient tube production per injection cycle and impacting production efficiency.

[0003] For example, Chinese patent literature discloses a plastic test tube injection mold [patent application number: CN202110355270.4], which includes a front mold and a rear mold, with a cavity between the front and rear molds. An injection port is located at the top of the cavity. A cooling structure is provided on the side of the front mold away from the rear mold to allow the test tube to detach more quickly. A pusher structure is located above the cooling structure to cut the end of the test tube after injection molding and cooling. A buffer structure is provided within the pusher structure to improve its anti-buffering capacity and reduce the wear of the cylinder and blade within the pusher structure. However, this method produces a small number of tubes per injection, resulting in low production efficiency. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing an injection molding mold for cryogenic tubes used for storing biochemical samples.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A cryotube injection molding mold for biochemical sample storage includes a movable mold plate and a fixed mold plate. The fixed mold plate is provided with a plurality of upper sleeve shafts for forming cryotubes, and the movable mold plate is provided with a plurality of lower sleeves corresponding to the upper sleeve shafts. When the mold is closed, the upper sleeve shafts can extend into the corresponding lower sleeves to form cryotube forming cavities. Each lower sleeve has an ejector rod at its bottom, and the ejector rod can slide into the lower sleeve.

[0007] In the above-mentioned injection molding mold for cryogenic tubes for biochemical sample storage, a flow divider is provided on the side of the fixed mold away from the moving mold. The flow divider is connected to the injection tube and has several injection ports. Each upper sleeve shaft is connected to one injection port. The flow divider is provided with a constant temperature structure.

[0008] In the above-mentioned injection molding mold for cryogenic tubes for biochemical sample storage, the constant temperature structure includes several heating wires inserted into the manifold, and the manifold is also provided with a heating electrical socket on its side.

[0009] In the above-mentioned injection molding mold for cryogenic tubes for biochemical sample storage, the upper and lower surfaces of the flow divider are respectively provided with placement grooves for placing heating wires, and the placement grooves are bent and arranged on the flow divider.

[0010] In the above-mentioned injection molding mold for cryotubes for biochemical sample storage, the cryotube forming cavity is located inside the lower sleeve, the bottom of the cryotube forming cavity is provided with an arc surface, and the top of the ejector rod is arc-shaped.

[0011] In the above-mentioned injection molding mold for cryotubes for biochemical sample storage, a placement molding area for molding the bottom placement area of ​​the cryotube is provided on the lower side of the arc surface. The bottom of the placement molding area is flat. The ejector rod is located below the placement molding area, and the inner diameter of the bottom of the placement molding area is larger than the outer diameter of the arc-shaped part at the top of the ejector rod.

[0012] In the above-mentioned injection molding mold for cryogenic tubes for biochemical sample storage, an upper sleeve is provided on the outer side of the upper sleeve shaft, and the lower sleeve can extend into the upper sleeve when the mold is closed.

[0013] In the above-mentioned injection molding mold for cryogenic tubes for biochemical sample storage, the moving template is provided with a number of cooling holes, and a number of lower sleeves are arranged in an array. The cooling holes penetrate the moving template, and there is one cooling hole between every two rows of adjacent lower sleeves.

[0014] In the above-mentioned injection molding mold for cryogenic tubes for biochemical sample storage, the manifold is provided with a number of cooling holes.

[0015] In the above-mentioned injection molding mold for cryogenic tubes for biochemical sample storage, the moving template is provided with a number of guide pillars, and the fixed template is provided with a number of guide grooves corresponding to the guide pillars, and the guide pillars can extend into the corresponding guide grooves.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. This mold has multiple freezing tube forming cavities, and multiple freezing tube plastic parts can be formed in one injection, improving production efficiency.

[0018] 2. The constant temperature structure ensures that the manifold has a certain and relatively high temperature. When the injection molding liquid is divided, it can slow down the rate of temperature drop of the injection molding liquid and prevent the injection molding liquid from solidifying before filling the freezing tube molding cavity. This improves the product qualification rate while ensuring increased production efficiency.

[0019] 3. Heat is provided by heating wires on the upper and lower sides of the manifold, so that the temperature of various parts of the manifold is similar, and the heating area is increased by the bending of the placement slot.

[0020] 4. Since injection molding is carried out under high pressure, the upper sleeve and the lower sleeve can be stabilized by extending the lower sleeve into the upper sleeve. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure;

[0022] Figure 2 yes Figure 1 A schematic diagram showing the structure with some parts hidden.

[0023] Figure 3 yes Figure 2 A schematic diagram showing the structure with some parts hidden.

[0024] Figure 4 yes Figure 3 A schematic diagram showing the structure with some parts hidden.

[0025] Figure 5 This is a schematic diagram of the structure of the cryogenic tube forming cavity.

[0026] In the figure: moving template 10, fixed template 11, upper sleeve shaft 12, lower sleeve 13, freezing tube forming cavity 14, ejector rod 15, flow divider 16, injection tube 17, heating electric socket 18, placement groove 19, arc surface 20, placement forming area 21, upper sleeve 22, cooling hole 23, guide post 24. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] This utility model provides an injection molding mold for cryotubes used for storing biochemical samples, combined with... Figure 1-5As shown, it includes a moving template 10 and a fixed template 11. The fixed template 11 is provided with a plurality of upper sleeve shafts 12 for forming frozen tubes. The moving template 10 is provided with a plurality of lower sleeves 13 corresponding to the upper sleeve shafts 12. When the mold is closed, the upper sleeve shafts 12 can extend into the corresponding lower sleeves 13 to form frozen tube forming cavities 14. Each lower sleeve 13 has an ejector rod 15 passing through its bottom. The ejector rod 15 can slide into the lower sleeve 13.

[0029] In this embodiment, during mold closing, the upper sleeve shaft 12 extends into the corresponding lower sleeve 13 to form a cryotube forming cavity 14. Molding liquid enters multiple cryotube forming cavities 14 to form cryotube plastic parts. After injection molding is complete, the moving mold plate 10 and the fixed mold plate 11 separate. At this time, the plastic part is adsorbed onto the lower sleeve 13. Then, the ejector rod 15 moves under the output of an external driver to eject the plastic part, completing demolding. This mold has multiple cryotube forming cavities 14, allowing multiple cryotube plastic parts to be formed in a single injection, thus improving production efficiency.

[0030] The fixed template 11 is provided with a flow divider 16 on the side away from the moving template 10. The flow divider 16 is connected to the injection tube 17, and the flow divider 16 is provided with a number of injection ports. Each upper sleeve shaft 12 is connected to one injection port. The flow divider 16 is provided with a constant temperature structure.

[0031] In this embodiment, since the injection molding liquid needs to be diverted into multiple cryogenic tube forming cavities 14, the diversion of the injection molding liquid results in a fast heat dissipation rate. Therefore, the constant temperature structure ensures that the diversion plate has a certain and relatively high temperature, which can slow down the temperature drop rate of the injection molding liquid during diversion and prevent the injection molding liquid from solidifying before filling the cryogenic tube forming cavity 14. This improves the product qualification rate while ensuring increased production efficiency.

[0032] The constant temperature structure includes several heating wires inserted in the flow divider plate 16, and the flow divider plate 16 is also provided with a heating power socket 18 on its side.

[0033] In this embodiment, the heating port 18 is connected to the power supply before injection molding, thereby keeping the manifold 16 at a high temperature for a long time through electric heating, preventing the injection molding liquid from solidifying prematurely.

[0034] The upper and lower surfaces of the flow divider 16 are respectively provided with placement grooves 19 for placing heating wires, and the placement grooves 19 are bent and arranged on the flow divider 16.

[0035] In this embodiment, heat is provided by heating wires on the upper and lower sides of the flow divider 16, so that the temperature of various places in the flow divider 16 is almost the same, and the heating area is increased by the bending arrangement of the placement groove 19.

[0036] The freezing tube forming cavity 14 is located inside the lower sleeve 13. The bottom of the freezing tube forming cavity 14 is provided with an arc surface 20, and the top of the ejector rod 15 is arc-shaped.

[0037] In this embodiment, the top of the ejector rod 15 has no end corner, so it will not damage the bottom of the cryogenic tube plastic part during the ejection process.

[0038] The lower side of the arc surface 20 is provided with a placement forming area 21 for forming the bottom placement area of ​​the freezer tube. The bottom of the placement forming area 21 is flat. The ejector rod 15 is located below the placement forming area 21, and the inner diameter of the bottom of the placement forming area 21 is larger than the outer diameter of the arc-shaped part at the top of the ejector rod 15.

[0039] In this embodiment, the bottom of the formed freezing tube has a flat surface formed at the placement forming area 21, which allows the freezing tube to stand stably on the table when placed on the tube rack, preventing the freezing tube from tipping over.

[0040] The upper sleeve 22 is provided on the outer side of the upper sleeve shaft 12. When the mold is closed, the lower sleeve 13 can extend into the upper sleeve 22.

[0041] In this embodiment, since injection molding is performed under high pressure, the upper sleeve 12 and the lower sleeve 13 can be stabilized by extending the lower sleeve 13 into the upper sleeve 22.

[0042] The moving template 10 is provided with a number of cooling holes 23 and a number of lower sleeves 13 are arranged in an array. The cooling holes 23 penetrate the moving template 10, and there is one cooling hole 23 between every two rows of adjacent lower sleeves 13.

[0043] In this embodiment, during the molding stage, the cooling liquid pipe inserted through the cooling hole 23 is used for rapid cooling.

[0044] The flow divider plate 16 is provided with a number of cooling holes 23.

[0045] In this embodiment, after injection molding, the heating wire stops heating and is rapidly cooled through the cooling liquid pipe inserted in the cooling hole 23.

[0046] The moving template 10 is provided with a number of guide posts 24, and the fixed template 11 is provided with a number of guide grooves corresponding to the guide posts 24, and the guide posts 24 can extend into the corresponding guide grooves.

[0047] The working principle of this utility model is as follows: Before injection molding, the heating plug 18 is connected to the power supply, so that the manifold 16 is kept at a high temperature for a long time through electric heating. When the mold is closed, the upper sleeve shaft 12 can extend into the corresponding lower sleeve 13 and form a cryogenic tube forming cavity 14. The injection liquid enters multiple cryogenic tube forming cavities 14 to form cryogenic tube plastic parts. After injection molding, the cooling liquid pipe inserted in the cooling hole 23 is quickly cooled down. After molding, the moving mold plate 10 and the fixed mold plate 11 are separated. At this time, the plastic part is adsorbed on the lower sleeve 13. Then, the ejector rod 15 moves under the output of the external driver to eject the plastic part and complete the demolding.

[0048] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0049] Although this article uses terms such as moving template 10, fixed template 11, upper sleeve shaft 12, lower sleeve 13, freezing tube molding cavity 14, ejector rod 15, flow divider 16, injection tube 17, heating electric socket 18, placement groove 19, arc surface 20, placement molding area 21, upper sleeve 22, cooling hole 23, guide post 24, etc., these terms are used only for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would be contrary to the spirit of this utility model.

Claims

1. A molding die for injecting cryovials for storing biochemical samples, comprising a movable mold plate (10) and a fixed mold plate (11), characterized in that, The fixed template (11) is provided with several upper sleeve shafts (12) for forming frozen tubes, and the moving template (10) is provided with several lower sleeves (13) corresponding to the upper sleeve shafts (12). When the mold is closed, the upper sleeve shafts (12) can extend into the corresponding lower sleeves (13) and form a frozen tube forming cavity (14). Each lower sleeve (13) has an ejector rod (15) at its bottom, and the ejector rod (15) can slide into the lower sleeve (13).

2. The injection molding mold for cryotubes for biochemical sample storage according to claim 1, characterized in that, The fixed template (11) is provided with a flow divider (16) on the side away from the moving template (10). The flow divider (16) is connected to the injection tube (17), and the flow divider (16) is provided with a number of injection ports. Each upper sleeve shaft (12) is connected to an injection port. The flow divider (16) is provided with a constant temperature structure.

3. The injection molding mold for cryotubes for biochemical sample storage according to claim 2, characterized in that, The constant temperature structure includes several heating wires inserted in the flow divider (16), and the flow divider (16) is also provided with a heating plug (18) on the side.

4. The injection molding mold for cryotubes for biochemical sample storage according to claim 3, characterized in that, The upper and lower surfaces of the flow divider (16) are respectively provided with placement grooves (19) for placing heating wires, and the placement grooves (19) are bent and arranged on the flow divider (16).

5. The injection molding mold for cryotubes for biochemical sample storage according to claim 1, characterized in that, The freezing tube forming cavity (14) is located inside the lower sleeve (13), the bottom of the freezing tube forming cavity (14) is provided with an arc surface (20), and the top of the ejector rod (15) is arc-shaped.

6. The injection molding mold for cryotubes for biochemical sample storage according to claim 5, characterized in that, The lower side of the arc surface (20) is provided with a placement forming area (21) for forming the bottom placement area of ​​the freezer tube. The bottom of the placement forming area (21) is flat. The ejector rod (15) is located below the placement forming area (21), and the inner diameter of the bottom of the placement forming area (21) is greater than the outer diameter of the arc-shaped part at the top of the ejector rod (15).

7. The injection molding mold for cryotubes for biochemical sample storage according to claim 1, characterized in that, The upper sleeve (22) is provided on the outer side of the upper sleeve shaft (12). When the mold is closed, the lower sleeve (13) can extend into the upper sleeve (22).

8. The injection molding mold for cryotubes for biochemical sample storage according to claim 1, characterized in that, The moving template (10) is provided with a number of cooling holes (23), and a number of lower sleeves (13) are arranged in an array. The cooling holes (23) penetrate the moving template (10), and there is a cooling hole (23) between every two rows of adjacent lower sleeves (13).

9. The injection molding mold for cryotubes for biochemical sample storage according to claim 2, characterized in that, The flow divider plate (16) is provided with a number of cooling holes (23).

10. The injection molding mold for cryotubes for biochemical sample storage according to claim 1, characterized in that, The moving template (10) is provided with a number of guide posts (24), and the fixed template (11) is provided with a number of guide grooves corresponding to the guide posts (24), and the guide posts (24) can extend into the corresponding guide grooves.

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