Medical instrument production part production injection mold

Abstract

The utility model discloses a production injection mold for production parts of medical instruments, which relates to the technical field of injection molds and is characterized in that a push-out mechanism is mounted on a front mold and is used for rotationally pushing out a molded injection molding part, and the push-out mechanism comprises a rotating rod which is separated from the injection molding part by rotating; the device has the effects that the front end of the rotating rod is separated from the surface of the injection molding part through rotation of the rotating rod in the push-out mechanism, and the rotating rod rotates to drive the sleeve to move forwards, so that the injection molding part is pushed forwards to leave the surface of a mold core of the front mold; the cross section of the sleeve is of an annular structure, so that the contact area between the sleeve and the injection molding part is reduced, and the injection molding part is separated more easily.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and more specifically, to an injection mold for producing parts of medical equipment. Background Art

[0002] Injection molding is a method of producing industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding and die casting. Injection molding machine is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting materials. Injection molding is achieved through injection molding machines and molds.

[0003] Many medical devices are made of plastic, such as syringe tubes, needle covers, urine test tubes, stool test cans, etc., and parts such as ventilator filter covers are also produced by injection molding. Small-volume injection molded parts such as needle covers are directly ejected by an ejection mechanism after injection molding and fall directly into the collection box below. During the demoulding process, no human intervention is required and a high degree of automation can be achieved.

[0004] For a relatively large cover structure like the respirator filter cover, the ejection mechanism is usually set up as a multi-group ejector structure. To balance the ejection force and position to ensure that the product is not deformed or broken, the ejectors are mostly distributed in the plane of the cover. In the actual production process, the front end of the ejector contacts the plane of the cover, and the front ends of the multiple groups of ejectors are all in the same plane. The cover will be tightly attracted to the front end of the ejector, and a lot of force is needed to manually pick it up. The picking position is between the two molds. If the force is not used properly, there is a greater risk of injury due to hitting the mold.

[0005] Therefore, in order to solve the above technical problems, the present application proposes an injection mold for producing parts for medical devices. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the utility model is to provide an injection mold for producing parts of medical devices.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: the injection mold for producing parts of medical devices comprises a front mold and a rear mold for injection molding, and the front mold is equipped with an ejection mechanism for rotating and ejecting the molded injection molded part;

[0008] The ejection mechanism comprises a rotating rod which is separated from the injection molded part by rotating. A sleeve is movably sleeved on the rotating rod. The sleeve is used to push the injection molded part forward and separate it from the front mold.

[0009] Preferably, a track connected end to end is provided on the surface of the rotating rod, a slider is slidably connected in the track, and the slider is rotatably connected to the sleeve through the mounting hole, so that the sleeve is driven to perform linear reciprocating motion through the rotation of the rotating rod.

[0010] Preferably, a restraining strip is provided on the surface of the sleeve, and a through hole matching the shape of the restraining strip is penetrated through the front mold to restrict the sleeve from moving only in a linear direction.

[0011] Preferably, the ejection mechanism is provided with multiple groups, one group is a central group, located at the circumference center of the front mold core, and the other groups are accompanying peripheral groups, which are arranged in a circle around the group;

[0012] The central group and the accompanying peripheral group are driven by a synchronous transmission structure.

[0013] Preferably, the synchronous transmission structure includes a rotating disk arranged on the rotating rod of the central group ejection mechanism, a gear ring is arranged on the inner side of the rotating disk, a driven gear is meshed in the gear ring, and the driven gear is arranged on the rotating rod of the companion group ejection mechanism, so that the rotating rod of the companion group ejection mechanism can be synchronously rotated through the rotating disk transmission.

[0014] Preferably, the rotating rod of the central group ejection mechanism is provided with a motor output shaft so as to drive the rotating rod to rotate through the motor.

[0015] Preferably, the rotating rod of the companion group ejection mechanism is rotatably connected in the mounting plate via a bearing.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. In the utility model, the front end of the rotating rod is separated from the surface of the injection molded part by rotating the rotating rod in the ejection mechanism, and the rotating rod rotates to drive the sleeve to move forward, thereby pushing the injection molded part forward and away from the surface of the front mold core. At this time, only the sleeve is in contact with the surface of the injection molded part. The cross-section of the sleeve is an annular structure, which reduces the contact area with the injection molded part, making it easier to separate the injection molded part, thereby solving the problem that the front end of the ejector pin contacts the plane of the cover in the actual production process. The front ends of multiple groups of ejector pins are all in the same plane, and the cover will be tightly attracted to the front end of the ejector pin. It takes a lot of force to manually pick it up, and the picking position is between the two molds. If the force is not used properly, there is a great risk of injury due to collision with the mold;

[0018] 2. In the utility model, by providing an ejection mechanism, the molded part can be effectively ejected and separated from the front mold after the injection molding is completed, thereby improving production efficiency; by providing multiple sets of ejection mechanisms, uniform force can be ensured on the molded part to prevent deformation or bursting of the molded part; by providing a synchronous transmission structure, the coordinated operation of the ejection mechanism can be ensured to extend the service life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 It is a structural schematic diagram of the rear mold in the utility model;

[0022] Figure 3 It is a structural schematic diagram of the track in the utility model;

[0023] Figure 4 It is a structural schematic diagram of the rotating disk in the utility model;

[0024] Figure 5 It is a structural schematic diagram of the driven gear in the utility model.

[0025] 1. Front mold; 2. Back mold;

[0026] 3. Launching institutions;

[0027] 31. sleeve; 32. slider; 33. rotating rod;

[0028] 311, mounting hole; 312, restraint strip;

[0029] 331, track;

[0030] 4. Synchronous transmission structure;

[0031] 42. Rotating disk; 43. Driven gear; 45. Gear ring; 46. Mounting plate. DETAILED DESCRIPTION

[0032] like Figure 1-5 As shown, a medical device production part production injection mold includes a front mold 1 and a rear mold 2 for injection molding, and an ejection mechanism 3 is installed on the front mold 1 for rotating and ejecting the molded injection molded part;

[0033] After the injection molding is completed, the front mold 1 moves and separates from the rear mold 2, and the injection molded part is located on the mold core of the front mold 1. At this time, the ejection mechanism 3 is in an inward state, and the front end is flush with the surface of the mold core. The synchronous transmission component drives the ejection mechanism 3, and the rotating rod 33 in the ejection mechanism 3 rotates, so that the front end of the rotating rod 33 is separated from the surface of the injection molded part. The rotation of the rotating rod 33 drives the sleeve 31 to move forward, thereby pushing the injection molded part forward and away from the surface of the mold core of the front mold 1. At this time, only the sleeve 31 is in contact with the surface of the injection molded part. The cross-section of the sleeve 31 is an annular structure, which reduces the contact area with the injection molded part, making it easier to separate the injection molded part.

[0034] The ejection mechanism 3 is provided with multiple groups, one group is a central group, located at the circumference center of the mold core of the front mold 1, and the other groups are accompanying peripheral groups, which are arranged in a circle around the group;

[0035] The central group and the peripheral group are driven by a synchronous transmission structure 4;

[0036] The rotating rod 33 of the center group ejection mechanism 3 is provided with a motor output shaft so as to drive the rotating rod 33 to rotate by the motor;

[0037] The synchronous transmission structure 4 includes a rotating disk 42 arranged on the rotating rod 33 of the central group ejection mechanism 3, and the rotating rod 33 rotates to drive the rotating disk 42 to rotate synchronously;

[0038] A gear ring 45 is provided on the inner side of the rotating disk 42, and a driven gear 43 is meshed in the gear ring 45. When the rotating disk 42 rotates, the gear ring 45 drives the meshed driven gear 43 to rotate. The driven gear 43 is provided on the rotating rod 33 of the companion group pushing mechanism 3. The rotating rod 33 of the companion group pushing mechanism 3 is rotatably connected in the mounting plate 46 through a bearing. Therefore, the driven gear 43 can only rotate in place, and the rotation speed of each driven gear 43 is consistent, so that the effect of synchronously rotating the rotating rod 33 of the companion group pushing mechanism 3 is achieved through the transmission of the rotating disk 42.

[0039] The ejection mechanism 3 includes a rotating rod 33 that is separated from the injection molded part by rotating. The surface of the rotating rod 33 is provided with a track 331 connected end to end. Figure 3 As shown, the track 331 is a V-shaped closed loop structure that is connected end to end. A slider 32 is slidably connected in the track 331, and a sleeve 31 is movably sleeved on the rotating rod 33. The slider 32 rotates through the mounting hole 311 and is rotatably connected to the sleeve 31. When the rotating rod 33 rotates, assuming that the sleeve 31 is fixed, the position of the track 331 relative to the mounting hole 311 gradually advances in the axial direction and then returns to the original position, and the slider 32 performs a linear reciprocating motion under the constraint of the track 331. The slider 32 will pull the sleeve 31 to move synchronously. The sleeve 31 is used to push the injection molded part forward and separate it from the front mold 1, and the sleeve 31 is driven to perform a linear reciprocating motion by the rotation of the rotating rod 33.

[0040] A restraining strip 312 is provided on the surface of the sleeve 31, and a through hole matching the shape of the restraining strip 312 is provided through the front mold 1, so as to restrict the sleeve 31 to move only in a straight line direction;

[0041] Therefore, by setting up the ejection mechanism 3, after the injection molding is completed, the injection molded part can be effectively ejected and separated from the front mold 1, thereby improving the production efficiency; by setting up multiple groups of ejection mechanisms 3, it is possible to ensure that the injection molded part is subjected to uniform force and prevent the injection molded part from being deformed or broken; by setting up the synchronous transmission structure 4, it is possible to ensure the coordinated operation of the ejection mechanism 3 and extend the service life of the mold.

[0042] The above description is only a preferred embodiment of the utility model and does not limit the utility model in any form. Any ordinary technician in the industry can smoothly implement the utility model as shown in the drawings of the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the protection scope of the technical solution of the utility model.

Claims

1. An injection mold for producing parts of medical devices, characterized in that: It comprises a front mold (1) and a rear mold (2) for injection molding, wherein the front mold (1) is provided with an ejection mechanism (3) for rotating and ejecting the molded part; The ejection mechanism (3) comprises a rotating rod (33) which is separated from the injection molded part by rotating, and a sleeve (31) is movably sleeved on the rotating rod (33), and the sleeve (31) is used to push the injection molded part forward to separate it from the front mold (1).

2. The injection mold for producing medical device parts according to claim 1, characterized in that: A track (331) connected end to end is provided on the surface of the rotating rod (33), a slider (32) is slidably connected inside the track (331), and the slider (32) is rotatably connected to the sleeve (31) through the mounting hole (311), so that the sleeve (31) is driven to perform linear reciprocating motion through the rotation of the rotating rod (33).

3. The injection mold for producing medical device parts according to claim 2, characterized in that: A restraining strip (312) is provided on the surface of the sleeve (31), and a through hole matching the shape of the restraining strip (312) is penetrated through the front mold (1) to restrict the sleeve (31) to move only in a linear direction.

4. The injection mold for producing medical device parts according to claim 2, characterized in that: The ejection mechanism (3) is provided with multiple groups, one group is a central group, located at the circumference center of the mold core of the front mold (1), and the other groups are accompanying peripheral groups, which are arranged in a circle around the central group; The central group and the companion group are driven by a synchronous transmission structure (4).

5. The injection mold for producing medical device parts according to claim 4, characterized in that: The synchronous transmission structure (4) comprises a rotating disk (42) arranged on a rotating rod (33) of a central group ejection mechanism (3); a toothed ring (45) is arranged on an inner side of the rotating disk (42); a driven gear (43) is meshed inside the toothed ring (45); and the driven gear (43) is arranged on the rotating rod (33) of the companion group ejection mechanism (3) so as to synchronously rotate the rotating rod (33) of the companion group ejection mechanism (3) through transmission of the rotating disk (42).

6. The injection mold for producing medical device parts according to claim 5, characterized in that: The rotating rod (33) of the central group pushing mechanism (3) is provided with a motor output shaft so as to drive the rotating rod (33) to rotate through the motor.

7. The injection mold for producing medical device parts according to claim 5, characterized in that: The rotating rod (33) of the companion group ejection mechanism (3) is rotatably connected in the mounting plate (46) via a bearing.

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