Injection mold with cooling structure for producing pipette tip

Abstract

The utility model relates to pipette tip production technical field, and disclose a kind of injection mould for pipette tip production with cooling structure, including base, the base top is provided with cooling mechanism, the cooling mechanism right side is provided with forming mechanism, the cooling mechanism includes first cooling component and second cooling component, the first cooling component is set to base top, the second cooling component is set to base rear side, when using, when being injection molding to pipette tip, first cooling component adopts liquid circulation cooling mode, cooling liquid is pumped into the cooling cavity of cooling mould from liquid storage tank through inlet pipe by water pump, after absorbing heat, return to liquid storage tank through return pipe, form continuous circulation, rapidly reduce mould temperature, to accelerate product solidification, reduce injection molding cycle, simultaneously, liquid storage tank is equipped with fin, enhance the heat exchange efficiency of cooling liquid, ensure that cooling effect is stable.

Description

Technical Field

[0001] This utility model relates to the field of pipette tip manufacturing technology, specifically to an injection mold for manufacturing pipette tips with a cooling structure. Background Technology

[0002] In fields such as biological experiments, medical testing, and chemical analysis, pipette tips are core consumables for precise pipetting operations. Their demand is huge, and they have extremely high requirements for product accuracy, surface smoothness, and structural integrity. Currently, the large-scale production of pipette tips mainly relies on injection molding processes. As a key piece of equipment in the production process, the performance of injection molds directly determines the production efficiency and product quality of pipette tips. However, existing injection molds for pipette tip production still have many technical limitations in practical applications, making it difficult to meet the demands for efficient and high-quality production. Pipettes are typically long and hollow, and the mold cavity structure is complex. Traditional molds often use a single natural cooling or local air cooling method, which makes it difficult to remove heat quickly and evenly. The coolant circulation system is not well designed, often resulting in poor coolant flow and low heat exchange efficiency. This leads to slow solidification of the pipette in the mold, with a single injection cycle lasting tens of seconds or even longer, which seriously restricts production efficiency and cannot meet the needs of large-scale mass production. Therefore, it is necessary to design an injection mold with a cooling structure for the production of pipettes to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to provide an injection mold with a cooling structure for producing pipette tips, so as to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an injection mold for producing pipette tips with a cooling structure, comprising a base, a cooling mechanism on the top of the base, and a molding mechanism on the right side of the cooling mechanism; The cooling mechanism includes a first cooling component and a second cooling component, wherein the first cooling component is disposed on the top of the base and the second cooling component is disposed on the rear side of the base; The first cooling assembly includes a support base, which is fixedly connected to the top left side of the base. A sliding rod is fixedly connected to the right side of the support base. A first hydraulic cylinder is fixedly connected to the left side of the support base. A cooling mold is fixedly connected to the right side of the first hydraulic cylinder. A moving mold is fixedly connected to the inner side of the cooling mold. An inlet pipe is fixedly connected to the top front side of the cooling mold. A storage tank is fixedly connected to the rear left end of the inlet pipe. An installation platform is fixedly connected to the bottom of the storage tank. A first connecting frame is fixedly connected to the periphery of the inlet pipe. A water pump is fixedly connected to the periphery of the inlet pipe. A filling pipe is fixedly connected to the top top rear side of the storage tank. A return pipe is fixedly connected to the top rear side of the storage tank. The front right end of the return pipe is fixedly connected to the bottom rear side of the cooling mold. A second connecting frame is fixedly connected to the periphery of the return pipe. A heat sink is fixedly connected to the left side of the storage tank.

[0005] Preferably, the cooling mold is slidably connected to the periphery of the slide rod, the mounting platform is fixedly connected to the left side of the base, the water pump is fixedly connected to the top of the mounting platform, and the first connecting frame and the second connecting frame are respectively fixedly connected to the front and rear sides of the cooling mold, so as to ensure the stability of the liquid inlet pipe and the liquid return pipe through the first connecting frame and the second connecting frame.

[0006] Preferably, the cooling mold has a cooling cavity inside, the right rear end of the liquid inlet pipe and the right front end of the liquid return pipe are respectively connected to the cooling cavity, the base has a material discharge groove inside, which is rectangular and located on the right side of the cooling mold, and both the liquid inlet pipe and the liquid return pipe are flexible hoses, which facilitates the discharge of the molded liquid pipette head through the material discharge groove.

[0007] Preferably, the second cooling assembly includes a fixed platform, which is fixedly connected to the rear side of the base. A fan is fixedly connected to the top of the fixed platform, a conveying pipe is fixedly connected to the front side of the fan, an air box is fixedly connected to the front side of the conveying pipe, and fixed frames are fixedly connected to the left and right sides of the air box.

[0008] Preferably, the bellows and the fixing frame are fixedly connected to the top of the fixing platform, so as to facilitate further cooling of the pipette tip formed on the insert through the bellows.

[0009] Preferably, the molding mechanism includes a fixed mold, which is fixedly connected to the right side of the slide rod and the top right side of the base. A pin is fixedly connected to the left side of the fixed mold, and a mounting bracket is fixedly connected to the front side of the fixed mold. A second hydraulic cylinder is fixedly connected to the right side of the mounting bracket, and a feeding plate is fixedly connected to the left side of the second hydraulic cylinder. The feeding plate is slidably connected to the slide rod and the periphery of the pin. A feeding pipe is fixedly connected to the right side of the fixed mold, and a servo motor is fixedly connected to the right side of the feeding pipe. A rotating rod is fixedly connected to the left side of the servo motor, and the rotating rod is rotatably connected inside the feeding pipe. An auger is fixedly connected to the periphery of the rotating rod.

[0010] Preferably, the insert pin is located on the front side of the air box, the auger is rotatably connected to the inside of the feeding pipe, the mounting bracket and the second hydraulic cylinder are provided in two sets and are symmetrically distributed on the front and rear sides of the fixed mold, and the insert pin is slidably connected to the inside of the moving mold, so that by setting two sets, the stability of the material plate movement can be guaranteed.

[0011] Compared with the prior art, this utility model provides an injection mold for producing pipette tips with a cooling structure, which has the following beneficial effects: 1. This injection mold for producing pipette tips with a cooling structure utilizes a cooling mechanism. During injection molding of the pipette tip, the first cooling component employs a liquid circulation cooling method. A water pump pumps coolant from the storage tank through the inlet pipe into the cooling chamber of the mold. After absorbing heat, the coolant returns to the storage tank through the return pipe, forming a continuous circulation that rapidly reduces the mold temperature, thereby accelerating product curing and shortening the injection cycle. Simultaneously, the storage tank is equipped with heat sinks to enhance the heat exchange efficiency of the coolant and ensure stable cooling. When the moving mold separates from the fixed mold, and the molded pipette tip is located around the insert pin, the second cooling component uses a fan and air box to force-cool the insert pin area, further cooling the pipette tip and insert pin. This prevents the product from deforming or sticking due to residual heat, further improving cooling uniformity and speed, and increasing subsequent processing efficiency.

[0012] 2. This injection mold for producing pipette tips with a cooling structure, through its molding mechanism, allows for the injection molding of pipette tips. After the cooling mold and the moving mold are closed with the fixed mold, molten raw material is fed into the delivery pipe according to a set amount. Under the action of a servo motor, rotating rod, and auger, the raw material is conveyed to the fixed mold and then to the moving mold via insert pins, thus completing the molding process. When molding is complete and the moving mold and fixed mold are separated, the molded pipette tip will be located around the insert pins. The second hydraulic cylinder drives the feeding plate to slide along the slide rod and insert pins, achieving automatic feeding. This avoids the inefficiency and product damage caused by manual operation and improves feeding efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the cooling mechanism. Figure 3 This is a schematic diagram of the first cooling component structure; Figure 4 This is a cross-sectional view of the cooling mold. Figure 5 This is a schematic diagram of the left side structure of the cooling mold; Figure 6 This is a schematic diagram of the second cooling component structure; Figure 7 This is a schematic diagram of the forming mechanism.

[0014] In the diagram: 1. Base; 2. Cooling mechanism; 3. Molding mechanism; 21. First cooling component; 22. Second cooling component; 211. Support base; 212. Cooling mold; 213. Slide rod; 214. Moving mold; 215. First hydraulic cylinder; 216. Liquid inlet pipe; 217. First connecting frame; 218. Water pump; 219. Liquid storage tank; 2191. Heat sink; 2192. Filling pipe; 2193. Return pipe; 2194. Second connecting frame; 221. Fixed platform; 222. Fan; 223. Conveying pipe; 224. Air box; 225. Fixed frame; 31. Fixed mold; 32. Mounting frame; 33. Second hydraulic cylinder; 34. Material feeding plate; 35. Insert pin; 36. Feeding pipe; 37. Servo motor; 38. Rotating rod; 39. Screwdriver. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0017] This utility model provides the following technical solution: Example 1 Please see Figure 1-7 This utility model provides a technical solution: an injection mold for producing pipette tips with a cooling structure, including a base 1, a cooling mechanism 2 on the top of the base 1, and a molding mechanism 3 on the right side of the cooling mechanism 2; The cooling mechanism 2 includes a first cooling component 21 and a second cooling component 22. The first cooling component 21 is disposed on the top of the base 1, and the second cooling component 22 is disposed on the rear side of the base 1. The first cooling assembly 21 includes a support base 211, which is fixedly connected to the top left side of the base 1. A slide rod 213 is fixedly connected to the right side of the support base 211. A first hydraulic cylinder 215 is fixedly connected to the left side of the support base 211. A cooling mold 212 is fixedly connected to the right side of the first hydraulic cylinder 215. A moving mold 214 is fixedly connected to the inner side of the cooling mold 212. An inlet pipe 216 is fixedly connected to the top front side of the cooling mold 212. A liquid storage tank 219 is fixedly connected to the rear left end of the inlet pipe 216. The liquid storage tank 219... A mounting platform is fixedly connected to the bottom of the liquid inlet pipe 216. A first connecting bracket 217 is fixedly connected to the periphery of the liquid inlet pipe 216. A water pump 218 is fixedly connected to the periphery of the liquid inlet pipe 216. A filling pipe 2192 is fixedly connected to the top of the liquid storage tank 219. A return pipe 2193 is fixedly connected to the top rear side of the liquid storage tank 219. The right end of the return pipe 2193 is fixedly connected to the bottom rear side of the cooling mold 212. A second connecting bracket 2194 is fixedly connected to the periphery of the return pipe 2193. A heat sink 2191 is fixedly connected to the left side of the liquid storage tank 219.

[0018] The cooling mold 212 is slidably connected to the periphery of the slide bar 213, the mounting platform is fixedly connected to the left side of the base 1, the water pump 218 is fixedly connected to the top of the mounting platform, and the first connecting frame 217 and the second connecting frame 2194 are fixedly connected to the front and rear sides of the cooling mold 212 respectively, so as to ensure the stability of the liquid inlet pipe 216 and the liquid return pipe 2193 through the first connecting frame 217 and the second connecting frame 2194.

[0019] The cooling mold 212 has a cooling chamber inside. The rear right end of the liquid inlet pipe 216 and the front right end of the liquid return pipe 2193 are respectively connected to the cooling chamber. The base 1 has a material discharge groove inside, which is rectangular and located on the right side of the cooling mold 212. Both the liquid inlet pipe 216 and the liquid return pipe 2193 are flexible hoses, which facilitates the discharge of the molded liquid transfer nozzle through the material discharge groove.

[0020] Please see Figure 1-7 The present invention provides a technical solution: the second cooling component 22 includes a fixed platform 221, the fixed platform 221 is fixedly connected to the rear side of the base 1, a fan 222 is fixedly connected to the top of the fixed platform 221, a conveying pipe 223 is fixedly connected to the front side of the fan 222, a wind box 224 is fixedly connected to the front side of the conveying pipe 223, and fixed frames 225 are fixedly connected to the left and right sides of the wind box 224.

[0021] The bellows 224 and the mounting bracket 225 are fixedly connected to the top of the mounting platform 221, so that the pipette tip formed on the insert pin 35 can be further cooled by the bellows 224.

[0022] Example 2 Please see Figure 1-7 Furthermore, based on Embodiment 1, the molding mechanism 3 further includes a fixed mold 31, which is fixedly connected to the right side of the slide rod 213 and the top right side of the base 1. A pin 35 is fixedly connected to the left side of the fixed mold 31, and a mounting bracket 32 ​​is fixedly connected to the front side of the fixed mold 31. A second hydraulic cylinder 33 is fixedly connected to the right side of the mounting bracket 32. A feeding plate 34 is fixedly connected to the left side of the second hydraulic cylinder 33. The feeding plate 34 is slidably connected to the periphery of the slide rod 213 and the pin 35. A feeding pipe 36 is fixedly connected to the right side of the fixed mold 31. A servo motor 37 is fixedly connected to the right side of the feeding pipe 36. A rotating rod 38 is fixedly connected to the left side of the servo motor 37. The rotating rod 38 is rotatably connected to the inside of the feeding pipe 36. An auger 39 is fixedly connected to the periphery of the rotating rod 38.

[0023] The insert pin 35 is located on the front side of the air box 224, the auger 39 is rotatably connected to the inside of the feeding pipe 36, the mounting bracket 32 ​​and the second hydraulic cylinder 33 are provided in two sets and are symmetrically distributed on the front and rear sides of the fixed mold 31, and the insert pin 35 is slidably connected to the inside of the moving mold 214, so that by setting two sets, the stability of the movement of the unloading plate 34 can be guaranteed.

[0024] In actual operation, when this device is used, when it is necessary to perform injection molding on the pipette tip, coolant is first added to the storage tank 219 through the injection pipe 2192. At the same time, the first hydraulic cylinder 215 drives the cooling mold 212 and the moving mold 214 to slide around the slide bar 213, so that the right side of the cooling mold 212 contacts the left side of the material plate 34, and the moving mold 214 and the fixed mold 31 can be closed. After the mold is closed, the molten raw material can be fed into the conveying pipe 223 according to the set amount. Under the action of the servo motor 37, the rotating rod 38 and the auger 39, the raw material can be conveyed into the fixed mold 31 and then into the moving mold 214 through the insert pin 35 to realize the molding work. During the molding process, the coolant is pumped from the storage tank 219 into the cooling chamber of the cooling mold 212 through the inlet pipe 216 by the water pump 218. After absorbing heat, it returns to the storage tank 219 through the return pipe 2193 to form a continuous circulation, which quickly reduces the mold temperature, thereby accelerating the product solidification and reducing the injection cycle. At the same time, the storage tank 219 is equipped with heat sinks 2191 to enhance the heat exchange efficiency of the coolant and ensure stable cooling effect, which can cool the moving mold 214 and improve the molding efficiency. After molding is completed, the cooling mold 212 and the moving mold 214 can be moved to the left under the action of the first hydraulic cylinder 215, so that the cooling mold 212 is located on the left side of the material discharge groove. When the moving mold 214 separates from the fixed mold 31, the molded pipette will be located around the insert pin 35. At this time, the area of ​​the insert pin 35 is forced to be cooled by the fan 222 and the air box 224, which further cools the pipette and the insert pin 35, preventing the product from deforming or sticking due to residual heat, further improving the cooling uniformity and speed, and improving the efficiency of subsequent processing. After cooling, the collection device is placed inside the bottom of the base 1 and located at the bottom of the feeding trough. The feeding plate 34 is driven by the second hydraulic cylinder 33 to slide along the slide bar 213 and the insert pin 35, so that the formed pipette tip can be pushed out from the outside of the insert pin 35, realizing automatic feeding, avoiding the inefficiency and product damage caused by manual operation, and improving the feeding efficiency. In this application, all the first hydraulic cylinders 215, the second hydraulic cylinders 33, the servo motors 37, and the water pumps 218 need to be connected to the same PLC controller near the mold to ensure coordinated and automated operation of the equipment. The PLC controller is existing technology, and those skilled in the art are well aware of its operation method. This application will not describe it in detail. Workers can replenish and replace the coolant through the filling pipe 2192.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An injection mold for producing pipette tips with a cooling structure, comprising a base (1), characterized in that: The base (1) is provided with a cooling mechanism (2) on its top, and a forming mechanism (3) is provided on the right side of the cooling mechanism (2). The cooling mechanism (2) includes a first cooling component (21) and a second cooling component (22), wherein the first cooling component (21) is disposed on the top of the base (1) and the second cooling component (22) is disposed on the rear side of the base (1); The first cooling assembly (21) includes a support base (211), which is fixedly connected to the top left side of the base (1). A slide rod (213) is fixedly connected to the right side of the support base (211). A first hydraulic cylinder (215) is fixedly connected to the left side of the support base (211). A cooling mold (212) is fixedly connected to the right side of the first hydraulic cylinder (215). A moving mold (214) is fixedly connected to the inner side of the cooling mold (212). An inlet pipe (216) is fixedly connected to the top front side of the cooling mold (212). A liquid storage tank (219) is fixedly connected to the rear left end of the inlet pipe (216). An installation platform (2195) is fixedly connected to the bottom of the liquid storage tank (219). The liquid inlet pipe (216) is fixedly connected to a first connecting bracket (217), the liquid inlet pipe (216) is fixedly connected to a water pump (218), the liquid storage tank (219) is fixedly connected to a filling pipe (2192) at the top, the liquid storage tank (219) is fixedly connected to a return pipe (2193) at the top rear side, the return pipe (2193) is fixedly connected to the bottom rear side of the cooling mold (212) at the front right end, the return pipe (2193) is fixedly connected to a second connecting bracket (2194) at the periphery, and the liquid storage tank (2199) is fixedly connected to a heat sink (2191) on the left side.

2. The injection mold for producing a pipette tip with a cooling structure according to claim 1, characterized in that: The cooling mold (212) is slidably connected to the periphery of the slide rod (213), the mounting platform (2195) is fixedly connected to the left side of the base (1), the water pump (218) is fixedly connected to the top of the mounting platform (2195), and the first connecting frame (217) and the second connecting frame (2194) are respectively fixedly connected to the front and rear sides of the cooling mold (212).

3. The injection mold for producing a pipette tip with a cooling structure according to claim 1, characterized in that: The cooling mold (212) has a cooling cavity inside. The right rear side of the liquid inlet pipe (216) and the right front side of the liquid return pipe (2193) are respectively connected to the cooling cavity. The base (1) has a material discharge groove inside, which is rectangular and located on the right side of the cooling mold (212). The liquid inlet pipe (216) and the liquid return pipe (2193) are both flexible hoses.

4. The injection mold for producing a pipette tip with a cooling structure according to claim 1, characterized in that: The second cooling assembly (22) includes a fixed platform (221), which is fixedly connected to the rear side of the base (1). A fan (222) is fixedly connected to the top of the fixed platform (221), a conveying pipe (223) is fixedly connected to the front side of the fan (222), a wind box (224) is fixedly connected to the front side of the conveying pipe (223), and a fixed frame (225) is fixedly connected to the left and right sides of the wind box (224).

5. The injection mold for producing a pipette tip with a cooling structure according to claim 4, characterized in that: The bellows (224) and the fixing frame (225) are respectively fixedly connected to the top of the fixing platform (221).

6. The injection mold for producing a pipette tip with a cooling structure according to claim 1, characterized in that: The forming mechanism (3) includes a fixed mold (31), which is fixedly connected to the right side of the slide rod (213) and the top right side of the base (1). A pin (35) is fixedly connected to the left side of the fixed mold (31). A mounting bracket (32) is fixedly connected to the front side of the fixed mold (31). A second hydraulic cylinder (33) is fixedly connected to the right side of the mounting bracket (32). A feeding plate (34) is fixedly connected to the left side of the second hydraulic cylinder (33). The feeding plate (34) is slidably connected to the slide rod (213) and the periphery of the pin (35). A feeding pipe (36) is fixedly connected to the right side of the fixed mold (31). A servo motor (37) is fixedly connected to the right side of the feeding pipe (36). A rotating rod (38) is fixedly connected to the left side of the servo motor (37). The rotating rod (38) is rotatably connected to the inside of the feeding pipe (36). An auger (39) is fixedly connected to the periphery of the rotating rod (38).

7. The injection mold for producing a pipette tip with a cooling structure according to claim 6, characterized in that: The insert (35) is located in front of the bellows (224), the auger (39) is rotatably connected to the inside of the feed pipe (36), the mounting bracket (32) and the second hydraulic cylinder (33) are provided in two sets and are symmetrically distributed on the front and rear sides of the fixed mold (31), and the insert (35) is slidably connected to the inside of the moving mold (214).

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