Spiral demolding structure of medical instrument connecting piece
By designing a spiral release structure, the problem of easy damage to threads and folded edges in the prior art is solved, and efficient and complete release of medical device connectors is achieved, and the quality and release rate of finished products are improved.
Patent Information
- Application Number
- CN202420221792.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-01-30
AI Technical Summary
The prior art is prone to damage threads and folded edges during the mold release process, resulting in product scrapping, especially in medical device connectors, where the pin bar structure leads to problems of adhesion and burrs.
A spiral mold release structure is designed, including a template group, a mold core group and a thread forming mechanism. Complete mold release is achieved through segmented mold opening and threading out to ensure the integrity of threads and folded edges. The structure includes separation of the upper and lower templates, fitting of gears and racks, and design of the limit sleeve and movable groove to ensure the integrity of the thread and the safe release of the folded edges.
It improves the demolding rate of the finished product, avoids damage to threads and folded edges, and ensures product integrity and quality.
Smart Images
Figure CN222309618U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to a spiral demoulding structure of a medical device connector. Background Art
[0002] In recent years, with the widespread application of plastic products, mold technology has developed rapidly, and mold design and mold manufacturing have been significantly improved. The requirements for products are also increasing. At present, for plastic products with threads, the mold is generally opened up and down or left and right according to the appearance of the product, resulting in a seam in the middle of the product, affecting the appearance of the product. In addition, the current demoulding mechanism uses many ejector rods to eject the product, which is complex in structure and has a large cost investment.
[0003] The key part of the injection molding mold for threaded shell parts is the smooth demoulding of the threads. Improper demoulding methods can easily damage the threads and lead to product scrapping. Threaded injection molding molds are generally made by relying on the threaded ring on the mold cavity. There are currently two commonly used demoulding methods. One is rotary demoulding. In the prior art, rotary demoulding is usually used to spirally rotate the thread core out of the product to allow the threads to be completely demoulded.
[0004] In medical device connectors, in addition to threads, folded edges are usually provided on the edges. However, the folded edges are relatively thin, and when ejected using a conventional ejector rod structure, adhesion may occur, resulting in damage to the folded edges and burrs. Summary of the invention
[0005] In order to solve the above problems existing in the prior art, the utility model provides a spiral demoulding structure of a medical device connector.
[0006] The technical solution provided by the utility model to solve the above technical problems is:
[0007] include,
[0008] A template group, comprising an upper template and a lower template which are superimposed when the mold is closed, and a mold cavity is provided between the upper template and the lower template;
[0009] The mold core assembly is located in the mold cavity and has a molding cavity capable of molding the outer shape of the medical device connector;
[0010] A core, located in the molding cavity, for molding the inner wall of the medical device connector;
[0011] Also included is a thread forming mechanism for forming the internal thread of the medical device connector;
[0012] The template group is provided with a mold opening connection component, and the template group has three mold opening strokes under the action of the mold opening connection piece;
[0013] During the first mold opening stroke, the upper mold plate moves upward under the action of the mold frame, and the upper mold plate and the lower mold plate are separated;
[0014] In the second mold opening stroke, the upper mold plate and the lower mold plate move upward simultaneously, so that the medical device connector is separated from the core on the mold frame;
[0015] During the third mold opening stroke, the upper mold plate continues to move upward and is completely separated from the lower mold plate, completing the mold opening.
[0016] The above technical solution is further configured as follows: the mold opening connection assembly includes an upper fixed hook and a lower fixed hook respectively fixed on the upper template and the lower template, and an idle travel distance is provided between the two hook parts of the upper fixed hook and the lower fixed hook.
[0017] The above technical solution is further configured as follows: an ejection component is also provided on the lower template, and an ejection head of the ejection component is located above the lower fixed hook; and the upper fixed hook is configured to be disengaged from the lower fixed hook.
[0018] The above technical solution is further configured as follows: a sliding groove is provided in the middle of the upper fixed hook and extends downward, and a limiting rod is provided at the lower end of the sliding groove;
[0019] The ejector head is located in the slide groove and can eject the limiting rod.
[0020] The above technical solution is further configured as follows: the ejection head is a convex portion arranged on the ejection component, and the convex portion faces away from one side of the lower fixing hook;
[0021] The end surface of the ejector head on the side away from the lower fixed hook is connected with an outer driving surface, an ejection surface and a reset surface in sequence from bottom to top.
[0022] The above technical solution is further configured as follows: a connecting block is provided on the upper template, and the upper fixing hook is hinged on the connecting block and can swing out relative to the upper template.
[0023] The above technical solution is further configured as follows: the thread forming mechanism includes a rack driven by a driving component, a gear meshing with the rack is provided in the upper template, and an internal thread forming head is arranged below the gear and rotates with the gear.
[0024] The above technical solution is further configured as follows: the upper template is provided with a movable groove capable of accommodating the rotation and axial movement of the gear, and the gear is limited and movable in the movable groove.
[0025] The above technical solution is further configured as follows: the movable groove is communicated with the forming cavity, movable columns are extended to both sides from the center of the gear, and the internal thread forming head is connected below the movable columns.
[0026] The above technical solution is further configured as follows: a limiting sleeve is threadedly connected to the movable column above the gear, and the limiting sleeve is fixed in the movable groove to limit the gear.
[0027] Compared with the prior art, the beneficial effects of the utility model are:
[0028] By setting the mold opening connection component, the upper mold plate and the lower mold plate are opened in sections, and the lower core is first removed from the product before the mold is fully opened, so as to ensure that the folding edge of the product and the core are adhered to each other during the mold opening process to produce defective products, thereby improving the demoulding rate of the finished product;
[0029] The internal thread of the product is demoulded by unscrewing the thread, and is placed before the template is opened to ensure the integrity of the internal thread. BRIEF DESCRIPTION OF THE DRAWINGS
[0030] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0031] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.
[0032] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of the C part in the middle.
[0033] Figure 4 It is a structural schematic diagram of the mold opening connection component.
[0034] Figure 5 It is a schematic diagram of the structure of the upper template and the lower template after the first stroke.
[0035] Figure 6 for Figure 5 Schematic diagram of the enlarged structure of the D area in the middle.
[0036] Figure 7 It is a schematic diagram of the structure of the upper template and the lower template after the second stroke.
[0037] Figure 8 It is a schematic diagram of the cross-sectional structure after the second stroke.
[0038] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure of part E in the middle.
[0039] Fig.10 It is a schematic diagram of the structure of the mold opening connection component during the separation process.
[0040] Fig.11 for Fig.10 Schematic diagram of the enlarged structure of part A in the middle.
[0041] Fig.12 It is a structural schematic diagram of the thread forming mechanism.
[0042] Fig.13 for Figure 2 Schematic diagram of the enlarged structure of part B in the middle.
[0043] Marking on the attached drawings: 100, upper template;
[0044] 200, lower template;
[0045] 300, mold opening connection assembly; 310, upper fixing hook; 320, lower fixing hook; 330, connection block; 340, ejection component; 341, ejection head; 350, limit rod; 341.1, external drive surface; 341.2, ejection surface; 341.3, reset surface;
[0046] 410, main core; 420, auxiliary core;
[0047] 500, products;
[0048] 600, auxiliary board;
[0049] 700, driving components;
[0050] 810, rack; 820, gear; 822, internal thread forming head; 821, movable column; 830, limit sleeve;
[0051] a. Activity slot. DETAILED DESCRIPTION
[0052] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.
[0053] like Figure 1-13 As shown, this embodiment discloses a spiral demoulding structure of a medical device connector.
[0054] Specific reference Figure 1 As shown, specifically including,
[0055] A template group, including an upper template 100 and a lower template 200 which are superimposed when the mold is closed, and a mold cavity is provided between the upper template 100 and the lower template 200;
[0056] The mold core assembly is located in the mold cavity and has a molding cavity capable of molding the outer shape of the medical device connector;
[0057] A core, located in the molding cavity, for molding the inner wall of the medical device connector;
[0058] Also included is a thread forming mechanism for forming the internal thread of the medical device connector;
[0059] The template group is provided with a mold opening connection component 300, and the template group has three mold opening strokes under the action of the mold opening connection piece;
[0060] During the first mold opening stroke, the upper mold plate 100 moves upward under the action of the mold frame, and the upper mold plate 100 and the lower mold plate 200 are separated;
[0061] In the second mold opening stroke, the upper mold plate 100 and the lower mold plate 200 move upward simultaneously, so that the medical device connector is separated from the core on the mold frame;
[0062] During the third mold opening stroke, the upper mold plate 100 continues to move upward and is completely separated from the lower mold plate 200, thereby completing the mold opening.
[0063] The above is the basic solution of this embodiment.
[0064] When the mold is closed, the threaded part of the thread forming mechanism extends into the molding cavity, and the injection molding material enters the molding cavity through the material channel to form a medical device connector with internal threads and folded edges; after the injection molding is completed, the mold is opened, and the mold opening process is divided into four steps: 1. First, the thread forming mechanism moves to turn the threaded part out of the molding cavity to form the internal threads on the molding product 500; 2. The template group is opened. In the first stroke, the upper template 100 and the lower template 200 are separated, and during the separation process, the upper template 100 drives the thread forming mechanism to move together, so that the thread forming mechanism is completely withdrawn from the product 500; 3. In the second stroke, the upper template 100 continues to move, and drives the lower template 200 to move together, and the lower mold core on the lower template 200 and the product 500 move together, so that the core withdraws relative to the middle and lower part of the product 500 and is separated from the folded edge; 4. The mold is opened continuously. In the third stroke, the upper template 100 and the lower template 200 are separated to complete the mold opening.
[0065] Reference Figure 2 and Figure 3 As shown, in this embodiment, the fold in the product 500 has a horizontal fold and a vertical fold pointing vertically downward. Therefore, the core in this embodiment includes a main core 410 for molding the inner wall of the product 500 and an auxiliary core 420 for molding the fold. The auxiliary core 420 is located below the fold and is separated from the fold from below when the mold is opened.
[0066] Preferably, in this embodiment, the main core 410 and the auxiliary core 420 are provided separately, and in other embodiments, they may also be provided as one body.
[0067] The specific implementation of the split mold connection assembly 300 in this embodiment is as follows: Figure 4As shown, the mold opening connection assembly 300 includes an upper fixed hook 310 and a lower fixed hook 320 respectively fixed on the upper mold plate 100 and the lower mold plate 200, and an idle travel distance is provided between the two hook parts of the upper fixed hook 310 and the lower fixed hook 320.
[0068] Specific reference Figure 5 and Figure 6 As shown, when the template assembly is opened, the upper template 100 and the lower template 200 are separated, and within the idle travel distance range, the upper fixed hook 310 and the lower fixed hook 320 are in a separated state, and the upper template 100 will not drive the lower template 200 to move, thereby realizing the first separation between the upper template 100 and the lower template 200, so that the thread forming mechanism in the upper template 100 is completely removed from the product 500.
[0069] When the upper template 100 completes the first stroke, the hook portion of the upper fixed hook 310 and the hook portion of the lower fixed hook 320 are in contact and connected. At this time, when the upper template 100 continues to open the mold, it will drive the lower template 200 together under the action of the hooking structure, so that the lower template 200 and the upper template 100 move together.
[0070] Specific reference Figure 7 and Figure 8 As shown, when the upper mold plate 100 continues to move away from the lower mold plate 200, the lower mold plate 200 and the upper mold plate 100 move simultaneously, so that the mold core in the lower mold plate 200 moves together with the product 500, thereby separating from the core below.
[0071] Reference Fig. 9 As shown, in the present embodiment, two auxiliary cores 420 are provided. In order to ensure the safe removal of the vertical fold on the product 500, in the second stroke, it is arranged that the auxiliary core 420 close to the vertical fold is separated from the product 500 first, and the other auxiliary core 420 supports the horizontal fold on the product 500 to avoid the horizontal fold and the removed auxiliary core 420 from sticking together during the removal process.
[0072] In order to realize the above-mentioned disengaging process, in this embodiment, the lower end of the auxiliary core 420 close to the vertical fold is fixed on the auxiliary plate 600, and the lower end of the other auxiliary core 420 is fixed to the lower template 200 and can move with the lower template 200.
[0073] When the demolding of the auxiliary core 420 is completed, it is necessary to continue the mold opening action of the upper template 100 and the lower template 200. In this embodiment, the lower template 200 is also provided with an ejection component 340, and the ejection head 341 of the ejection component 340 is located above the lower fixed hook 320; when the upper fixed hook 310 continues to move upward to reach the position of the ejection head 341, the ejection head 341 can eject the hook portion of the upper fixed hook 310 outward, thereby allowing the upper fixed hook 310 and the lower fixed hook 320 to be detached.
[0074] In this embodiment, an auxiliary plate 600 is disposed below the lower template 200 , the lower end of the ejection component 340 is fixed on the auxiliary plate 600 , and the upper end extends to the side of the lower template 200 .
[0075] Reference Fig.10 and Fig.11 As shown, when the upper fixed hook 310 and the lower fixed hook 320 are hooked, the lower fixed hook 320 is driven to move together. When it moves to the end of the second stroke, the upper fixed hook 310 moves to below the ejection head 341 of the ejection component 340, and the mold is continued to be opened. The upper template 100 drives the upper fixed hook 310 to move, so that the upper fixed hook 310 moves to the position of the ejection head 341, and moves outward under the ejection action of the ejection head 341, thereby separating from the lower fixed hook 320.
[0076] The specific implementation of the upper fixed hook 310 in this embodiment is as follows: a sliding groove is provided in the middle of the upper fixed hook 310 and extends downward, and a limiting rod 350 is provided at the lower end of the sliding groove;
[0077] The ejector head 341 is located in the slide groove and can eject the limiting rod 350 .
[0078] In the mold closing state, the limiting rod 350 is located below the ejector head 341; when the limiting rod 350 moves upward with the upper fixed hook 310 and contacts the ejector head 341, the upper fixed hook 310 continues to move, and the ejector head 341 ejects the limiting rod 350 outward, so that the hook part of the upper fixed hook 310 also moves outward.
[0079] The specific implementation of the ejector head 341 in this embodiment is as follows: the ejector head 341 is a convex portion provided on the ejector component 340, and the convex portion is away from the side of the lower fixing hook 320;
[0080] The end surface of the ejection head 341 which is away from the lower fixing hook 320 is connected with an outer driving surface 341.1, an ejection surface 341.2 and a reset surface 341.3 in sequence from bottom to top.
[0081] Reference Figure 4 As shown, the ejection surface 341.2 is located at the outermost end of the ejection head 341 and is a vertical surface;
[0082] The outer driving surface 341.1 is located below the ejection surface 341.2 and is an inclined surface. When the lower fixing hook 320 moves upward along with the upper template 100, the limiting rod 350 moves along the outer driving surface 341.1, and the outer driving surface 341.1 applies an inclined outward ejection force to the limiting rod 350, thereby ejecting the limiting rod 350 outward.
[0083] The reset surface 341.3 is connected to the upper side of the vertical surface, and is also an inclined surface, and is symmetrical with the outer drive surface 341.1. When the limit rod 350 is ejected and moves up to the outside of the ejection surface 341.2, the mold continues to open, the upper mold plate 100 drives the upper fixing hook 310 to move upward, and the limit rod 350 also moves upward to the reset surface 341.3 and slides along the reset surface 341.3 until it slides to the vertical direction.
[0084] In this embodiment, in order to enable the hook portion on the upper fixed hook 310 to move outward, the upper fixed hook 310 is configured to be hinged so that the hook portion can rotate around the upper end of the upper fixed hook 310; its specific implementation method is: a connecting block 330 is provided on the upper template 100, and the upper fixed hook 310 is hinged on the connecting block 330, and can have a swinging action relative to the upper template 100.
[0085] In this embodiment, the specific implementation of the thread forming mechanism is as follows: the thread forming mechanism includes a rack 810 driven by a driving component 700, a gear 820 meshing with the rack 810 is provided in the upper template 100, and an internal thread forming head 822 is arranged below the gear 820 and rotates with the gear 820.
[0086] Reference Fig.12 As shown, the driving component 700 is located outside the mold, the rack 810 extends into the mold and meshes with the gear 820, and the lower end of the gear 820 is connected to the internal thread forming head 822 with gear teeth. When the driving component 700 drives the rack 810 to move, the gear 820 rotates accordingly, so that the internal thread forming head 822 is rotated out of the product 500, ensuring the molding quality of the internal thread.
[0087] Preferably, in this embodiment, the driving component 700 may be a driving cylinder, which drives the rack 810 to move horizontally.
[0088] When the gear 820 rotates, since the internal thread forming head 822 moves upward relative to the product 500, the gear 820 also moves upward. In order to limit the moving range of the gear 820, the upper template 100 is provided with a movable groove a that can accommodate the rotation and axial movement of the gear 820, and the gear 820 is limited to move in the movable groove a.
[0089] Reference Fig.13As shown, the movable groove a is connected to the molding cavity, and movable columns 821 are extended from the center of the gear 820 to both sides, and the core is connected below the movable columns 821.
[0090] In order to stably connect the gear 820 and the movable column 821 , a limiting sleeve 830 is threadedly connected to the movable column 821 above the gear 820 . The limiting sleeve 830 is fixed in the movable groove a to limit the gear 820 .
[0091] When the gear 820 rotates, a threaded rotation is also formed between the movable column 821 and the limiting sleeve 830, thereby ensuring that the movable column 821 does not shake during the rotation and does not contact the upper template 100.
[0092] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A spiral demoulding structure for a medical device connector, comprising: A template group comprises an upper template (100) and a lower template (200) which are superimposed when the mold is closed, and a mold cavity is provided between the upper template (100) and the lower template (200); The mold core assembly is located in the mold cavity and has a molding cavity capable of molding the outer shape of the medical device connector; A core, located in the molding cavity, for molding the inner wall of the medical device connector; Features: Also included is a thread forming mechanism for forming the internal thread of the medical device connector; The template group is provided with a mold opening connection component (300), and the template group has three mold opening strokes under the action of the mold opening connection component; During the first mold opening stroke, the upper mold plate (100) moves upward under the action of the mold frame, and the upper mold plate (100) and the lower mold plate (200) are separated; In the second mold opening stroke, the upper mold plate (100) and the lower mold plate (200) move upward simultaneously, so that the medical device connector is separated from the core on the mold frame; During the third mold opening stroke, the upper mold plate (100) continues to move upward and is completely separated from the lower mold plate (200), thus completing the mold opening.
2. The spiral demoulding structure of the medical device connector according to claim 1, characterized in that: The mold opening connection assembly (300) comprises an upper fixed hook (310) and a lower fixed hook (320) respectively fixed on the upper mold plate (100) and the lower mold plate (200), and an idle travel distance is provided between the two hook parts of the upper fixed hook (310) and the lower fixed hook (320).
3. The spiral demoulding structure of the medical device connector according to claim 2, characterized in that: The lower template (200) is also provided with an ejection component (340), and an ejection head (341) of the ejection component (340) is located above the lower fixed hook (320); and is configured to remove the upper fixed hook (310) from the lower fixed hook (320).
4. The spiral demoulding structure of the medical device connector according to claim 3, characterized in that: A sliding groove is provided in the middle of the upper fixed hook (310) and extends downward, and a limiting rod (350) is provided at the lower end of the sliding groove; The ejection head (341) is located in the slide groove and is capable of ejecting the limiting rod (350).
5. The spiral demoulding structure of the medical device connector according to claim 3 or 4, characterized in that: The ejection head (341) is a convex portion arranged on the ejection component (340), and the convex portion faces away from the side of the lower fixing hook (320); The end surface of the ejection head (341) on the side facing away from the lower fixed hook (320) is provided with an outer driving surface (341.1), an ejection surface (341.2) and a reset surface (341.3) in sequence from bottom to top.
6. The spiral demoulding structure of the medical device connector according to claim 5, characterized in that: The upper template (100) is provided with a connecting block (330), and the upper fixing hook (310) is hinged on the connecting block (330) and can swing out relative to the upper template (100).
7. The spiral demoulding structure of the medical device connector according to claim 1, characterized in that: The thread forming mechanism comprises a rack (810) driven by a driving component (700), a gear (820) meshing with the rack (810) is provided in the upper mold plate (100), and an internal thread forming head (822) is arranged below the gear (820) and rotates together with the gear (820).
8. The spiral demoulding structure of the medical device connector according to claim 7, characterized in that: The upper mold plate (100) is provided with a movable groove (a) capable of accommodating the rotation and axial movement of the gear (820), and the gear (820) is limited and movable in the movable groove (a).
9. The spiral demoulding structure of the medical device connector according to claim 8, characterized in that: The movable groove (a) is communicated with the forming cavity, and movable columns (821) are extended from the center of the gear (820) to both sides, and the internal thread forming head (822) is connected below the movable column (821).
10. The spiral demoulding structure of the medical device connector according to claim 9, characterized in that: A limiting sleeve (830) is threadedly connected to the movable column (821) above the gear (820), and the limiting sleeve (830) is fixed in the movable groove (a) to limit the gear (820).