A molding die for an insulin pen

Abstract

The utility model relates to a kind of forming die of insulin pen, and the front side of fixed die is equipped with front core-pulling mechanism, and the rear side of fixed die is equipped with rear core-pulling mechanism, and the front core-pulling mechanism includes a rotating core rod, and the rotating core rod is equipped with core rod gear, and the rotating core rod is equipped with threaded portion, and the front core-pulling mechanism includes a connecting block with internal thread, and the connecting block is fixed opposite to fixed die plate, and the connecting block is equipped with a threaded hole, and the threaded portion of rotating core rod is screwed in threaded hole, so that rotating core rod rotation can drive rotating core rod to move back and forth, and the utility model has the beneficial effect that: the design and manufacturing precision of core-pulling mechanism are higher, and the size and shape of each part of insulin pen can be accurately controlled.This is particularly important for insulin pen, which requires extremely high dimensional accuracy for medical equipment, to ensure the accuracy of its dose adjustment and the reliability of injection.

Description

Technical Field

[0001] This utility model relates to a mold, and more particularly to a molding mold for an insulin pen. Background Technology

[0002] The injection mold used to produce insulin pens is a key tool for manufacturing various components of the insulin pen, and its design and manufacturing precision directly affect the quality and performance of the insulin pen.

[0003] Insulin pens are precision medical devices, requiring extremely high dimensional and fitting accuracy for their components. The design and manufacture of the molds must ensure the production of parts that meet these precision requirements to guarantee the proper use and accurate injection of the insulin pen.

[0004] The mold mainly consists of a moving mold and a fixed mold, with a cavity in the middle. The moving mold has a casting channel. For hollow products like insulin pens, a core-pulling casting system is also required.

[0005] However, the structure of an insulin pen is relatively complex, and a conventional core-pulling mechanism cannot be used to finalize the design of the insulin pen. Utility Model Content

[0006] In order to overcome the shortcomings of the current insulin pen mold's ordinary core-pulling structure, which cannot meet its requirements, this utility model provides a molding mold for insulin pens.

[0007] The technical solution of this utility model to solve its technical problem is: a molding die for an insulin pen, including a movable template and a fixed template. A movable mold core is provided below the movable template, and a fixed mold core is provided above the fixed template. A cavity is provided on the movable mold core and the fixed mold core. A front core-pulling mechanism is provided on the front side of the fixed mold core, and a rear core-pulling mechanism is provided on the rear side of the fixed mold core. The front core-pulling mechanism includes a rotating core rod with a core rod gear and a threaded portion. The front core-pulling mechanism includes a connecting block with an internal thread. The connecting block is fixed relative to the fixed template. The mechanism includes a threaded hole, in which the threaded portion of the rotating core rod is screwed. Rotation of the core rod allows it to move back and forth. The front core-pulling mechanism also includes a first gear pair and a second gear pair. The first gear pair includes a first large gear and a first small gear, and the second gear pair includes a second large gear and a second small gear. The first large gear meshes with the core rod gear, and the first small gear meshes with the second large gear. The front core-pulling mechanism also includes a rack drive cylinder, on which a rack is connected to the piston rod. The rack meshes with the second small gear. It also includes a rear core-pulling mechanism, which includes a rear core-pulling cylinder, the piston rod of which is connected to a movable block, and the movable block is connected to a rear core-pulling rod; The rotating core rod and the rear core-pulling rod enter the cavity. This allows the rotating core rod to be pulled out, thus forming the internal thread of the insulin pen tube.

[0008] To increase the positioning accuracy of the rotating core rod of the front core-pulling mechanism, a positioning groove is provided at the head of the rotating core rod; it also includes a positioning locking mechanism, which includes a positioning locking cylinder. The piston head of the positioning locking cylinder is provided with a locking head, which is aligned with the positioning groove and can be inserted into the positioning groove. This structure allows the rotating core rod of the front core-pulling mechanism to be accurately positioned by the positioning locking head after it is inserted into the cavity.

[0009] The structure of the locking head is optimized so that the locking head is located on a locking block, and the locking block is connected to the piston head of the positioning locking cylinder.

[0010] To accommodate multiple rotating core rods, a locking block is provided with multiple locking heads.

[0011] Further optimization involves providing four pairs of rotating core rods and a rear core-pulling rod within a set of cavities.

[0012] Furthermore, the moving template and the fixed template each have two cavities, and the front core-pulling mechanism and the rear core-pulling mechanism are provided in two separate configurations.

[0013] In use, the mold is first injected with molten plastic into the cavity. After cooling, the front core-pulling mechanism and the rear core-pulling mechanism pull out the core relative to each other. The front core-pulling mechanism is driven by the rack of the rack-driven cylinder to rotate and pull out the core. The rear core-pulling mechanism is driven by the rear core-pulling cylinder and then the moving template moves upward to push the workpiece out of the cavity to complete the injection molding.

[0014] The beneficial effects of this invention are as follows: 1. The core-pulling mechanism is designed and manufactured with high precision, enabling accurate control of the size and shape of each part of the insulin pen. During the molding process, the front and rear core-pulling mechanisms can accurately extract and insert the core according to the mold design requirements, ensuring the dimensional and positional accuracy of structures such as side holes and side recesses. This is particularly important for insulin pens, a medical device with extremely high dimensional accuracy requirements, ensuring the accuracy of dosage adjustment and the reliability of injection. 2. Compared to the traditional method of requiring multiple sets of molds to complete the molding of insulin pens, this reduces the number of molds required and the associated costs. Furthermore, the reduction in the number of molds also lowers storage and management costs. 3. Because the front and rear core-pulling mechanisms can achieve one-time molding of complex structures, it avoids splicing marks and surface unevenness caused by assembling multiple parts. Simultaneously, the smoothness and precision of the core-pulling mechanism's movement also help reduce damage to the surface of the product, thereby improving the surface quality of the insulin pen and making it more aesthetically pleasing. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the insulin pen component of this utility model.

[0016] Figure 2 This is a schematic diagram of one embodiment of the present invention.

[0017] Figure 3 This is a perspective view of one embodiment of the present invention.

[0018] Figure 4 yes Figure 3 An enlarged schematic diagram of the front core-pulling mechanism.

[0019] Figure 5 This is a perspective view of another embodiment of the present invention. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Example 1

[0021] Combined with appendix Figures 1 to 5 A molding die for an insulin pen 1 includes a movable mold plate 2 and a fixed mold plate 3. A movable mold core 4 is located below the movable mold plate 2, and a fixed mold core 5 is located above the fixed mold plate 3. A cavity is formed on the movable mold core 4 and the fixed mold core 5. A front core-pulling mechanism 6 is located on the front side of the fixed mold core 5, and a rear core-pulling mechanism 7 is located on the rear side of the fixed mold core 5. The front core-pulling mechanism 6 includes a rotating core rod 8, a core rod gear 9, and a threaded portion 10. The front core-pulling mechanism 6 also includes a connecting block 11 with an internal thread. The connecting block 11 is fixed relative to the fixed mold plate 3 and has a threaded hole. The rotating core rod 8... The threaded portion 10 is screwed into the threaded hole, so that rotating the core rod 8 can drive the core rod 8 to move back and forth. The front core pulling mechanism 6 also includes a first gear pair 12 and a second gear pair 13. The first gear pair 12 includes a first large gear 14 and a first small gear 15. The second gear pair 13 includes a second large gear 16 and a second small gear 17. The first large gear 14 meshes with the core rod gear 9 for transmission. The first small gear 15 meshes with the second large gear 16 for transmission. The front core pulling mechanism 6 also includes a rack drive cylinder 18. A rack 19 is connected to the piston rod of the rack drive cylinder 18. The rack 19 meshes with the second small gear 17 for transmission. It also includes a rear core-pulling mechanism 7, which includes a rear core-pulling cylinder 20. The piston rod of the rear core-pulling cylinder 20 is connected to a movable block 21, and a rear core-pulling rod 22 is connected to the movable block 21. The rotating core rod 8 and the rear core-pulling rod 22 partially enter the cavity. This allows the rotating core rod 8 to be pulled out, thus forming the internal thread of the insulin pen tube.

[0022] To increase the positioning accuracy of the rotating core rod 8 of the front core-pulling mechanism 6, a positioning groove is provided at the head of the rotating core rod 8; it also includes a positioning locking mechanism 23, which includes a positioning locking cylinder 24. The piston head of the positioning locking cylinder 24 is provided with a locking head 25, which is aligned with the positioning groove and can be inserted into the positioning groove. This structure allows the rotating core rod 8 of the front core-pulling mechanism 6 to be accurately positioned by the positioning locking head 25 after it is inserted into the cavity.

[0023] The structure of the locking head 25 is preferably optimized, wherein the locking head 25 is located on a locking block 26, and the locking block 26 is connected to the piston head of the positioning locking cylinder 24.

[0024] To accommodate multiple rotating core rods 8, a locking block 26 is provided with multiple locking heads 25.

[0025] Further optimization involves providing four pairs of rotating core rods 8 and a rear core-pulling rod 22 within a set of cavities.

[0026] Furthermore, the moving template 2 and the fixed template 3 each have two cavities, and the front core-pulling mechanism 6 and the rear core-pulling mechanism 7 are provided in two forms.

[0027] In use, the mold is first injected with molten plastic into the cavity. After cooling, the front core-pulling mechanism 6 and the rear core-pulling mechanism 7 pull out the core relative to each other. The front core-pulling mechanism 6 is driven by the rack 19 of the rack drive cylinder 18 to rotate and pull out the core. The rear core-pulling mechanism 7 is driven by the rear core-pulling cylinder 20 and then the moving template 2 moves upward to push the workpiece out of the cavity to complete the injection molding.

[0028] The beneficial effects of this utility model are as follows: 1. The core-pulling mechanism is designed and manufactured with high precision, enabling accurate control of the size and shape of each part of the insulin pen. During the molding process, the front and rear core-pulling mechanisms can accurately extract and insert the core according to the mold design requirements, ensuring the dimensional and positional accuracy of structures such as side holes and side recesses. This is particularly important for medical devices like insulin pens, which have extremely high requirements for dimensional accuracy, ensuring the accuracy of dosage adjustment and the reliability of injection. 2. Compared to the traditional method of requiring multiple sets of molds to complete the molding of insulin pens, this reduces the number of molds manufactured and the cost. In addition, the reduction in the number of molds also reduces the storage and management costs of molds. 3. Because the front and rear core-pulling mechanisms 7 can achieve one-time molding of complex structures, it avoids splicing marks and surface unevenness caused by the assembly of multiple parts. At the same time, the smoothness and precision of the core-pulling mechanism's movement also help reduce damage to the surface of the product, thereby improving the surface quality of the insulin pen and making its appearance more aesthetically pleasing.

Claims

1. A forming die for an insulin pen, comprising a moving die plate and a fixed die plate, a moving die core is arranged below the moving die plate, a fixed die core is arranged above the fixed die plate, and a cavity is arranged on the moving die core and the fixed die core, characterized in that: The fixed mold core is provided with a front core-pulling mechanism on its front side and a rear core-pulling mechanism on its rear side. The front core-pulling mechanism includes a rotating core rod with a core rod gear and a threaded portion. The front core-pulling mechanism also includes a connecting block with an internal thread, which is fixed relative to the fixed mold plate. The connecting block has a threaded hole, and the threaded portion of the rotating core rod is screwed into the threaded hole, so that the rotation of the rotating core rod can drive the rotating core rod to move back and forth. The front core-pulling mechanism also includes a first gear pair and a second gear pair. The first gear pair includes a first large gear and a first small gear, and the second gear pair includes a second large gear and a second small gear. The first large gear meshes with the core rod gear, and the first small gear meshes with the second large gear. The front core-pulling mechanism also includes a rack drive cylinder, on which a rack is connected. The rack meshes with the second small gear. It also includes a rear core-pulling mechanism, which includes a rear core-pulling cylinder, the piston rod of which is connected to a movable block, and the movable block is connected to a rear core-pulling rod; The rotating core rod and the rear core-pulling rod enter the cavity.

2. The molding die for the insulin pen according to claim 1, characterized in that: The rotating core rod has a positioning groove at its head; it also includes a positioning locking mechanism, which includes a positioning locking cylinder. The piston head of the positioning locking cylinder has a locking head, which is aligned with the positioning groove and can be inserted into the positioning groove.

3. The molding die for the insulin pen according to claim 2, characterized in that: The locking head is located on a locking block, which is connected to the piston head of the positioning locking cylinder.

4. The molding die for the insulin pen according to claim 3, characterized in that: The locking block is provided with multiple locking heads.

5. The molding die for the insulin pen according to claim 1, characterized in that: A set of cavities is equipped with 4 pairs of rotating core rods and rear core-pulling rods.

6. The molding die for the insulin pen according to claim 1, characterized in that: The moving template and the fixed template each have two cavities, and the front core-pulling mechanism and the rear core-pulling mechanism are provided in two.

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