A plastic ring forming mold with threads on both inner and outer walls
By designing a plastic ring mold with threads on both the inner and outer walls, using structures such as guide plates, push rods, sliders and cores, the problems of complex mold release and easy thread damage when the inner and outer walls are synchronized, achieving an efficient and low-cost production process.
Patent Information
- Application Number
- CN202420162500.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-23
- Publication Date
- 2025-04-08
- Estimated Expiration
- 2034-01-23
AI Technical Summary
When existing plastic ring molds form threads at the same time on the inner and outer walls, the demolding process is complicated and the threads are easily damaged, resulting in high production costs and poor quality.
A plastic ring forming mold with threads on both the inner and outer walls is designed. Through the synergistic action of the fixed mold and the moving mold, the structures such as guide plates, push rods, sliders and cores are used to achieve synchronous molding and safe mold release of the inner and outer wall threads.
The synchronous forming of inner and outer wall threads is achieved without secondary processing, which reduces production costs, improves efficiency, and ensures product quality and safety.
Smart Images
Figure CN222727215U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a plastic mould in the technical field, in particular to a plastic ring forming mould with threads on both inner and outer walls. Background Art
[0002] Threaded rings are widely used as positioning connectors in many fields of products. Among them, plastic rings are corrosion-resistant, not easy to rust and have low production costs, and are more widely used. In production, when it is necessary to set threads on the inner and outer walls of the plastic ring, because demolding is more troublesome, most of them adopt the process of injection molding one side of the thread (on the inner wall or the outer wall), and then use machining to process the other side of the thread. The production is more cumbersome, and the material turnover during the period occupies human and material resources, which increases the production cost. Utility Model Content
[0003] In response to the problems existing in the above-mentioned prior art, the utility model provides a plastic ring forming mold with threads on both the inner and outer walls, which can simultaneously form threads on the outer and inner walls of the product without the need for secondary processing, with low production costs. It can also avoid damaging the inner wall of the product and the threads thereon during the mold opening process, thereby ensuring product quality.
[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is as follows:
[0005] A plastic ring forming mold with threads on both inner and outer walls, comprising a fixed mold and a movable mold, wherein:
[0006] A template is set on the fixed mold, and a guide plate extending toward the movable mold is provided at the center of the end of the fixed mold; two groups of inclined push rods are symmetrically provided on both sides of the guide plate on the fixed mold;
[0007] The movable mold is provided with a movable mold plate, and two sliders are symmetrically arranged on the movable mold plate on both sides of the guide plate, each of the sliders is provided with a molding plate, and each molding plate is formed with a semicircular groove on the side wall facing the guide plate, and a first thread is provided on the inner wall of each groove, and each slider can be connected with a group of push rods in a mold closing process and can slide on the movable mold under the drive of the push rods to drive the two molding plates to move toward or away from each other; the movable mold is provided with a mounting plate that coincides with the center line of the guide plate, and the mounting plate is provided with two first cores and two second cores with arc-shaped outer walls arranged at intervals along the circumferential direction at the end of the mounting plate facing the fixed mold, each of the second cores is slidably connected with the two first cores and the mounting plate, each of the first cores is adapted to the guide plate and can slide along it under the action of external force, and a second thread is provided on the outer wall of each of the first cores, and one end of each of the second cores obliquely passes through the mounting plate and is connected with the movable mold in a transmission manner, and when the mold is closed, the two first cores and the two second cores are surrounded to form a cylinder and are arranged on the inner side of the two grooves.
[0008] As a further elaboration of the above technical solution:
[0009] In the above technical solution, the guide plate is an isosceles trapezoidal structure, the smaller end of the guide plate faces the mounting plate, and both side walls of the guide plate are first inclined surfaces extending inwardly.
[0010] In the above technical solution, each of the first cores is an isosceles trapezoidal structure, with its larger end facing the mounting plate, and its two side walls are second inclined surfaces extending outwardly; the inner wall of the first core is provided with a first slideway adapted to the first inclined surface, and its outer wall is an arc surface; the bottom end of the first core is provided with a cam.
[0011] In the above technical solution, the mounting plate is a cylindrical structure, and a boss coaxial with the fixed mold is provided at its end facing the fixed mold. A groove adapted to the cam and perpendicular to its axis is provided at the center of the boss, and two sliding grooves inclined outward and passing through the mounting plate are symmetrically provided on both sides of the groove.
[0012] In the above technical solution, each of the second cores includes a limit block and an inclined sliding rod, each of the sliding rods is adapted to a sliding groove and slides therein, and each of the limit blocks is matched above the boss, and its inner wall is a third inclined surface adapted to the second inclined surface, and its outer wall is an arc surface.
[0013] In the above technical solution, a fixed mold core is embedded on the fixed mold plate, the guide plate is detachably fixed on the fixed mold core, and the two groups of push rods are symmetrically arranged on two opposite sides of the fixed mold core.
[0014] In the above technical solution, a movable mold core is embedded on the movable mold plate, and the mounting plate is installed on the movable mold core; the movable mold plate is provided with slideways adapted to the slider on two opposite sides of the movable mold core.
[0015] In the above technical solution, each molding plate is provided with a glue inlet channel on the side of the groove that can match and connect with the flow channel, and the end of each glue inlet channel extends to the inner wall of the groove.
[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: by setting two forming plates to jointly enclose the outer contour of the product, and setting two first cores and a second core to jointly enclose the inner contour of the product, it is convenient to synchronously form threads on the outer wall and the inner wall of the product, and the product does not need secondary processing, which saves time and effort, improves efficiency, and reduces production costs; by setting the guide plate and the first core, the first core and the second core, the first core and the mounting plate, and the second core and the mounting plate are all set to be slidingly connected, the core position can be guided by the guide plate during the mold closing process to ensure that a core matching the inner wall of the product is formed, and the first inclined surface of the guide plate can be used to guide the two first cores to move toward each other on the mounting plate to leave the product during the mold opening process, so as to avoid the first core from damaging the threads formed on the inner wall of the product during the exit process. At the same time, the third inclined surface cooperates with the second inclined surface, and the slide rod cooperates with the slide groove to ensure that the second core can smoothly follow the movable mold and the mounting plate to exit from the inner wall of the product in a straight line, so as to avoid damaging the inner wall of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 is a schematic diagram of the decomposed structure of this embodiment;
[0018] Figure 2 Schematic diagram of the structure of the molding plate and the core in the mold closing state of this embodiment (only part of the core and the molding plate are shown);
[0019] Figure 3 is a schematic diagram of the structure of the guide plate in this embodiment;
[0020] Figure 4 is a schematic structural diagram of the first core in this embodiment;
[0021] Figure 5 is a schematic diagram of the mounting plate structure in this embodiment;
[0022] Figure 6 is a schematic structural diagram of the second core in this embodiment;
[0023] Figure 7 Schematic diagram of the structure of the forming plate in this embodiment.
[0024] In the figure: 10, guide plate; 11, first inclined surface; 20, push rod; 30, slider; 40, molding plate; 41, groove; 42, first thread; 43, glue inlet channel; 50, mounting plate; 51, boss; 52, slot; 53, slide; 60, first core; 61, second thread; 62, second inclined surface; 63, first slide; 64, convex; 70, second core; 71, limit block; 72, slide rod; 73, third inclined surface; 80, fixed mold core; 90, fixed mold plate; 100, movable mold core; 110, movable mold plate; 120, slide. DETAILED DESCRIPTION
[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.
[0026] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and cannot be understood as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features being in direct contact, or it can include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is lower in level than the second feature.
[0027] like Figure 1-7 As shown, a plastic ring forming mold with threads on both the inner and outer walls comprises a fixed mold and a movable mold, wherein:
[0028] A template 90 is set on the fixed mold, and a guide plate 10 extending toward the movable mold is provided at the center of the end of the fixed mold 90; two sets of inclined push rods 20 are symmetrically provided on both sides of the guide plate 10 on the fixed mold;
[0029] The movable mold is provided with a movable mold plate 110, and two sliders 30 are symmetrically provided on the movable mold plate 110 on both sides of the guide plate 10, and each slider 30 is provided with a molding plate 40, and each molding plate 40 is formed with a semicircular groove 41 on the side wall facing the guide plate 10, and each groove 41 is provided with a first thread 42 on the inner wall, and each slider 30 can be connected with a group of push rods 20 during the mold closing process and can slide on the movable mold under the drive thereof to drive the two molding plates 40 to move toward or away from each other; the movable mold is provided with a mounting plate 50 that coincides with the center line of the guide plate 10, and the mounting plate 50 faces At the end of the fixed mold, two first cores 60 and two second cores 70, both of which have arc-shaped outer walls, are arranged at intervals in the circumferential direction. Each second core 70 is slidably connected to the two first cores 60 and the mounting plate 50. Each first core 60 is adapted to the guide plate 10 and can slide along it under the action of external force. A second thread 61 is provided on the outer wall of each first core 60. One end of each second core 70 obliquely passes through the mounting plate 50 and is transmission-connected to the movable mold. When the mold is closed, the two first cores 60 and the two second cores 70 are combined to form a cylinder and are arranged on the inner side of the two grooves 41.
[0030] In this embodiment, the slider 30 is provided with holes and grooves adapted to each group of push rods 20 so as to enable the slider 30 to slide on the movable mold through the push rods 20 during the mold closing process.
[0031] The utility model sets two forming plates 40 to jointly form the outer contour of the product, and sets two first cores 60 and a second core 70 to jointly form the inner contour of the product, so that threads can be synchronously formed on the outer wall and the inner wall of the product respectively through the forming plates 40 and the first core 60, and the product does not need secondary processing, which saves time and labor, improves efficiency and reduces production costs.
[0032] The movable mold on the plastic mold is connected to the mold closing driving force transmission, and can move linearly towards or away from the fixed mold under its drive. Its composition structure and action principle are common knowledge to technicians in this field, and the transmission mechanism on the mold will not be described here.
[0033] Further, such as Figure 3 As shown, the guide plate 10 is an isosceles trapezoidal structure, with its smaller end facing the mounting plate 50, and both side walls thereof being first inclined surfaces 11 extending inwardly.
[0034] Further, such as Figure 4 As shown, each first core 60 is an isosceles trapezoidal structure, with its larger end facing the mounting plate 50, and its two side walls are both second inclined surfaces 62 extending outwardly; the inner wall of the first core 60 is provided with a first slideway 63 adapted to the first inclined surface 11, and its outer wall is an arc surface; the bottom end of the first core 60 is provided with a locking protrusion 64.
[0035] Further, such as Figure 5As shown, the mounting plate 50 is a cylindrical structure, and its end facing the fixed mold is provided with a boss 51 coaxial with it, and the center of the boss 51 is provided with a groove 52 adapted to the locking protrusion 64 and perpendicular to its axis, and the boss 51 is symmetrically provided with two sliding grooves 53 inclined outward and passing through the mounting plate 50 on both sides of the groove 52.
[0036] Further, such as Figure 6 As shown, each second core 70 includes a limit block 71 and an inclined slide rod 72, each slide rod 72 is adapted to a slide groove 53 and slides therein, each limit block 71 is matched and arranged above the boss 51, its inner wall is a third inclined surface 73 adapted to the second inclined surface 62, and its outer wall is an arc surface.
[0037] It can be understood that in the utility model, the guide plate 10 and the first core 60, the first core 60 and the second core 70, the first core 60 and the mounting plate 50, and the second core 70 and the mounting plate 50 are all slidably connected. The guide plate 10 can be used to correct the positions of the first core 60 and the second core 70 during the mold closing process to ensure that the arc-shaped outer walls of the first core 60 and the second core 70 can completely close the cylinder matching the inner wall of the product. In addition, the first inclined surface 11 of the guide plate can be used to guide the two first cores 60 to move toward each other on the slot 52 to leave the product during the mold opening process to avoid the second thread 61 from damaging the thread formed on the inner wall of the product during the exit process; at the same time, the third inclined surface 73 cooperates with the second inclined surface 62, and the slide rod 72 cooperates with the slide groove 53 to ensure that the second core 70 can smoothly follow the movable mold and the mounting plate 50 to exit from the inner wall of the product in a straight line to avoid damaging the inner wall of the product.
[0038] Furthermore, a fixed mold core 80 is embedded on the fixed mold plate 90 , the guide plate 10 is detachably fixed on the fixed mold core 80 , and two sets of push rods 20 are symmetrically arranged on two opposite sides of the fixed mold core 80 .
[0039] Furthermore, a movable mold core 100 is embedded in the movable mold plate 110 , and the mounting plate 50 is mounted on the movable mold core 100 ; slideways 120 adapted to the slider 30 are provided on the movable mold plate 110 on two opposite sides of the movable mold core 100 .
[0040] Further, such as Figure 7 As shown, each molding plate 40 is provided with a glue inlet channel 43 that can match and connect with the flow channel beside the groove 41 , and the end of each glue inlet channel 43 extends to the inner wall of the groove 41 .
[0041] The working process of the utility model is:
[0042] Mold closing: The slider 30 on the movable mold contacts the push rod 20 and is pushed by it to move toward the mounting plate 50. The two sliders 30 drive the two molding plates 40 to move toward each other and press together. The two semicircular grooves 41 match the outer wall of the product. Synchronously, the movable mold drives the mounting plate 50 to move toward the fixed mold. The mounting plate 50 drives the two first cores 60 and the two second cores 70 thereon to move toward the guide plate 10. The guide plate 10 can guide them until the two first cores 60 and the two second cores 70 are surrounded by the periphery of the guide plate 10 to form a combined core, and the arc surface on the outer wall of the core matches the inner wall of the product.
[0043] Molding: After the mold is closed, the glue is injected between the two grooves 41 and the combined core, and the first thread 41 can form an external thread on the outer wall of the product, and the second thread 61 can form an internal thread on the inner wall of the product;
[0044] Mold opening: the movable mold leaves the fixed mold, the pull rod 20 pulls the slider 30 to drive the molding plate to move to both sides away from the product, the mounting plate 50 pulls the first core 60 to slide on the guide plate 10, the first inclined surface 11 cooperates with the second inclined surface 62, the two first cores 60 are inclined and move toward each other on the mounting plate 50, and the second threads 61 thereon leave the inner wall of the product to avoid damaging the threads on the inner wall of the product; the two second cores 70 are synchronously translated and withdrawn from the inner side of the product with the movable mold.
[0045] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.
Claims
1. A plastic ring forming mold with threads on both inner and outer walls, comprising a fixed mold and a movable mold, characterized in that: A template is set on the fixed mold, and a guide plate extending toward the movable mold is provided at the center of the end of the fixed mold; two groups of inclined push rods are symmetrically provided on both sides of the guide plate on the fixed mold; The movable mold is provided with a movable mold plate, and two sliders are symmetrically arranged on the movable mold plate on both sides of the guide plate, each of the sliders is provided with a molding plate, and each molding plate is formed with a semicircular groove on the side wall facing the guide plate, and a first thread is provided on the inner wall of each groove, and each slider can be connected with a group of push rods in a mold closing process and can slide on the movable mold under the drive of the push rods to drive the two molding plates to move toward or away from each other; the movable mold is provided with a mounting plate that coincides with the center line of the guide plate, and the mounting plate is provided with two first cores and two second cores with arc-shaped outer walls arranged at intervals along the circumferential direction at the end of the mounting plate facing the fixed mold, each of the second cores is connected with the two first cores in a sliding manner, each of the first cores is adapted to the guide plate and can slide along it under the action of external force, and a second thread is provided on the outer wall of each of the first cores, and one end of each of the second cores obliquely passes through the mounting plate and is connected with the movable mold in a transmission manner, and when the mold is closed, the two first cores and the two second cores are surrounded to form a cylinder and are arranged on the inner side of the two grooves.
2. A plastic ring forming mold with threads on both inner and outer walls according to claim 1, characterized in that: The guide plate is an isosceles trapezoidal structure, with its smaller end facing the mounting plate, and both side walls thereof being first inclined surfaces extending inwardly.
3. A plastic ring forming mold with threads on both inner and outer walls according to claim 2, characterized in that: Each of the first cores is an isosceles trapezoidal structure, with its larger end facing the mounting plate and its two side walls being second inclined surfaces extending outwardly; the inner wall of the first core is provided with a first slideway adapted to the first inclined surface, and its outer walls are all arc surfaces; the bottom end of the first core is provided with a latching protrusion.
4. A plastic ring forming mold with threads on both inner and outer walls according to claim 3, characterized in that: The mounting plate is a cylindrical structure, and a boss coaxial with the fixed mold is provided at its end facing the fixed mold. A groove adapted to the cam and perpendicular to its axis is provided at the center of the boss, and two sliding grooves inclined outward and passing through the mounting plate are symmetrically provided on both sides of the groove.
5. A plastic ring forming mold with threads on both inner and outer walls according to claim 4, characterized in that: Each of the second cores includes a limit block and an inclined slide rod, each of the slide rods is adapted to a slide groove and slides therein, each of the limit blocks is matched above the boss, its inner wall is a third inclined surface adapted to the second inclined surface, and its outer wall is an arc surface.
6. A plastic ring forming mold with threads on both inner and outer walls according to claim 1, characterized in that: A fixed mold core is also embedded on the fixed mold plate, the guide plate is detachably fixed on the fixed mold core, and the two groups of push rods are symmetrically arranged on two opposite sides of the fixed mold core.
7. A plastic ring forming mold with threads on both inner and outer walls according to claim 1, characterized in that: The movable mold plate is also embedded with a movable mold core, and the mounting plate is installed on the movable mold core; the movable mold plate is provided with slideways adapted to the slider on two opposite sides of the movable mold core.
8. A plastic ring forming mold with threads on both inner and outer walls according to any one of claims 1 to 7, characterized in that: Each molding plate is provided with a glue inlet channel on the side of the groove and can be matched with the flow channel, and the end of each glue inlet channel extends to the inner wall of the groove.