Front mold thread demoulding mechanism
Set the oil cylinder and tooth strips in parallel in the injection mold, and adopt a segmented mold structure to solve the problem of the traditional axial size interference mold and the difficulty of molding the mold in the middle of the traditional twisted tooth core. Model quality and accuracy.
Patent Information
- Application Number
- CN202323418066.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-14
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2033-12-14
AI Technical Summary
When forming external threads of the existing injection molds, the traditional twisting core extraction method leads to the coaxial arrangement of the cylinder and the rack, the axial dimension is too long to operate, and it is difficult to produce the mold independently.
Use the oil cylinder and the rack to set up side by side to reduce the axial length of the device, and avoid interference through the segmental outlet structure to achieve the segmented outlets of the external thread of the pillar and the inner hole.
Effectively reduce the interference of mold operation, improve the quality and accuracy of molding, and avoid difficulty in making mold out of traditional methods.
Smart Images
Figure CN222406985U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mold forming, in particular to a front mold thread stripping mechanism. Background Art
[0002] Injection molded products are plastic products that are formed by injecting molten plastic from a nozzle into a mold cavity, cooling and solidifying, and then taking out the molded plastic products from the mold cavity. In some injection molded products, it is necessary to form a threaded structure on its surface or inside to facilitate connection or fixation with other parts. There is an injection molded product that has a hole column in the front mold direction of the mold that needs to be formed with an external thread, and the external thread precision requirements are high. The left and right slider molding method cannot be used. The current molding method of thread-cutting core pulling is adopted, but the traditional thread-cutting core pulling adopts the front end of the oil cylinder to connect the rack. The oil cylinder and the rack are coaxially set, and the axial dimension is too long, which is easy to interfere with the operation of the mold. At the same time, the outer thread and the inner hole of the product hole column need to be molded and ejected in the front mold, and the traditional independent thread-cutting core pulling is difficult to eject.
[0003] Therefore, in view of the deficiencies in the prior art, the utility model designs a front mold thread stripping mechanism to solve the above problems.
[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solution of the utility model and facilitating the understanding of those skilled in the art. It cannot be considered that the above contents are well known to those skilled in the art simply because they are explained in the background technology of the utility model. Utility Model Content
[0005] In order to overcome the deficiencies in the above-mentioned prior art, the purpose of the utility model is to provide a front mold threading mechanism, which adopts a side-by-side arrangement of the cylinder and the rack to reduce the axial length of the device, and at the same time adopts a segmented demolding structure for the inner hole and external thread of the product hole column to avoid mutual interference.
[0006] In order to achieve the above-mentioned purpose and other related purposes, the technical solution provided by the utility model is: a front mold thread stripping mechanism, including a cylinder, a rack, a transmission gear set and a molding assembly, the cylinder is fixed on the front mold plate, and its right output end is connected to the right side of the rack through a fixed block, and the rack and the cylinder are arranged side by side, and its upper end tooth surface is connected to the input end gear of the transmission gear set;
[0007] The molding component includes a tooth shaft, a tooth sleeve and a core. The outer periphery of the tooth shaft is provided with an external gear and an external thread. The external gear is meshed with the output end gear of the transmission gear set. The external tooth is connected to the inner side of the tooth sleeve. The tooth sleeve is fixed on the front template. A through hole is provided on the inner side of the tooth shaft. An external thread forming part for molding the external thread of the product is provided on the inner side of the front end of the through hole. The outer periphery of the core is slidably connected with the inner wall of the through hole. A hole forming part for molding the hole position of the product is provided at the front end of the core. The rear end of the core is fixed on the front template.
[0008] The preferred technical solution is: a guide frame is provided at the front end of the oil cylinder, a guide groove is provided on the guide frame, protrusions are provided on both sides of the fixed block, and the protrusions are slidably connected to the guide groove to improve the stability of the movement of the fixed block.
[0009] The preferred technical solution is: a T-shaped guide rail is provided on the lower side of the rack, a positioning block is provided on the outer side of the T-shaped guide rail, a T-shaped slide groove is provided on the positioning block, and the T-shaped guide rail is arranged in the T-shaped slide groove and slidably connected thereto, so that the rack movement is more stable.
[0010] The preferred technical solution is: the transmission gear set includes a coaxially arranged small-diameter gear and a large-diameter gear, the small-diameter gear is connected to the upper tooth surface of the rack, and the large-diameter gear is connected to the outer gear, thereby reducing the stroke of the rack to avoid interference with other parts of the mold due to excessive rack stroke.
[0011] The preferred technical solution is: limiters for feeding back the rack position are respectively provided on the leftmost and rightmost sides of the rack travel, and the movement of the oil cylinder can be accurately controlled through the signals fed back by the limiters.
[0012] The preferred technical solution is: a positioning piece is also slidably connected to the outer periphery of the tooth axis, and the positioning block is fixed on the front template to ensure the accurate and stable positioning of the tooth axis.
[0013] Due to the application of the above-mentioned technical scheme, the utility model provides a front mold thread stripping mechanism, which reduces the size of the mechanism by arranging the rack and the oil cylinder side by side to avoid interference with the operation of the mold, and adopts a combined core-pulling mechanism to first demold the external thread of the product hole column and then open the mold to demold the inner hole of the hole column, thereby avoiding interference during the demolding process and improving the demolding quality. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a structural schematic diagram of a front mold thread stripping mechanism of the utility model;
[0015] Figure 2 It is a structural schematic diagram of the product in the utility model;
[0016] Figure 3 It is a structural schematic diagram of the fixing block in the utility model;
[0017] Figure 4 It is a schematic diagram of the structure of the rack in the utility model;
[0018] Figure 5 It is a structural schematic diagram of the positioning block in the utility model;
[0019] Figure 6 This is a schematic diagram of the structure of the central tooth axis of the utility model;
[0020] Figure 7It is a structural schematic diagram of the core in the utility model.
[0021] In the above drawings, 1, cylinder; 11, fixing block; 11a, protrusion; 12, guide frame; 12a, guide groove; 2, rack; 21, T-type guide rail; 22, positioning block; 22a, T-type slide groove; 3, transmission gear set; 31, small diameter gear; 32, large diameter gear; 4, forming assembly; 41, tooth shaft; 41a, external gear; 41b, external tooth; 41c, through hole; 41d, external thread forming part; 42, tooth sleeve; 43, core; 43a, hole forming part; 44, positioning piece; 5, limiter; 6, product; 61, hole column external thread; 62, hole column inner hole. DETAILED DESCRIPTION
[0022] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.
[0023] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the utility model product is usually placed when in use, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply 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 a limitation on the present utility model. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions, and cannot be understood as indicating or implying relative importance. Terms such as "horizontal", "vertical", and "overhanging" do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0024] like Figure 1 and Figure 2 As shown, in order to solve the molding and demolding problems of the external thread 61 of the hole column and the inner hole 62 of the hole column on the product 6, the utility model proposes a front mold thread removal mechanism, which includes a cylinder 1, a rack 2, a transmission gear set 3 and a molding component 4. The main components of the above-mentioned utility model will be described in detail below.
[0025] like Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, the cylinder 1 is fixed on the front template, and its right output end is connected to the right side of the rack 2 through a fixed block 11. The rack 2 and the cylinder 1 are arranged side by side. A guide frame 12 is provided at the front end of the cylinder 1, and a guide groove 12a is provided on the guide frame 12. Bumps 11a are provided on both sides of the fixed block 11, and the bumps 11a are slidably connected with the guide groove 12a. A T-shaped guide rail 21 is provided on the lower side of the rack 2, and a positioning block 22 is provided on the outer side of the T-shaped guide rail 21. The positioning block 22 is provided with a T-shaped slide groove 22a. The T-shaped guide rail 21 is arranged in the T-shaped slide groove 22a and is slidably connected thereto. The leftmost and rightmost sides of the rack 2 are respectively provided with limiters 5 for feedback of the position of the rack 2.
[0026] like Figure 1 and Figure 6 As shown, the transmission gear set 3 includes a small-diameter gear 31 and a large-diameter gear 32 which are coaxially arranged, and the small-diameter gear 31 is transmission-connected to the tooth surface at the upper end of the rack 2 .
[0027] like Figure 1 , Figure 6 and Figure 7 As shown, the molding component 4 includes a tooth shaft 41, a tooth sleeve 42 and a core 43. The outer periphery of the tooth shaft 41 is provided with an external gear 41a and an external tooth 41b. The external gear 41a is meshed with the large diameter gear 32 on the transmission gear set 3, and the external tooth 41b is connected to the inner side of the tooth sleeve 42. The tooth sleeve 42 is fixed on the front template. A through hole 41c is provided on the inner side of the tooth shaft 41. An external thread molding part 41d for molding the external thread of the product is provided on the inner side of the front end of the through hole 41c. The outer periphery of the core 43 is slidably connected to the inner wall of the through hole 41c. A hole molding part 43a for molding the hole position of the product is provided at the front end of the core 43. The rear end of the core 43 is fixed on the front template. The outer periphery of the tooth shaft 41 is also slidably connected with a positioning piece 44, and the positioning block 44 is fixed on the front template.
[0028] refer to Figure 1 - Figure 7 As shown, after the product is formed, before the mold is opened, the rack 2 is driven to move by the cylinder 1, and the small diameter gear 31 and the large diameter gear 32 coaxial with the small diameter gear 31 are driven to rotate by the tooth surface at the upper end of the rack 2, so that the external gear 41a meshing with the large diameter gear 32 rotates synchronously, driving the tooth shaft 41 and the external teeth 41b and the external thread forming part 41d thereon to rotate synchronously, and the external teeth 41b cooperate with the tooth sleeve 42 to gradually separate the external thread forming part 41d from the hole column external thread 61 on the product 6. At this time, the core 43 remains stationary due to the sliding connection with the through hole 41c of the tooth shaft 41. When the external thread forming part 41d is completely separated from the product, the mold is opened to complete the demolding of the hole forming part 43a on the core 43 and the hole column inner hole 62.
[0029] In summary, the front mold thread stripping mechanism disclosed in the utility model reduces the length of the mechanism and the interference with other parts of the mold through the side-by-side design of the cylinder and the rack. At the same time, it adopts a segmented mold demolding structural design to ensure the accuracy of product molding.
[0030] The above embodiment provided by the utility model is only an example of the principle and effect of the utility model, and is not used to limit the utility model. Anyone familiar with this technology can modify or change the above embodiment without violating the spirit and scope of the utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed by the utility model should still be covered by the claims of the utility model.
Claims
1. A front mold thread stripping mechanism, characterized in that: The mechanism comprises an oil cylinder (1), a rack (2), a transmission gear set (3) and a forming assembly (4); the oil cylinder (1) is fixed on the front template, and its right output end is connected to the right side of the rack (2) through a fixing block (11); the rack (2) and the oil cylinder (1) are arranged side by side, and the tooth surface at the upper end thereof is connected to the input gear of the transmission gear set (3) through transmission connection; The molding assembly (4) comprises a tooth shaft (41), a tooth sleeve (42) and a core (43); the outer periphery of the tooth shaft (41) is provided with an external gear (41a) and an external tooth (41b); the external gear (41a) is meshed with the output end gear of the transmission gear set (3); the external tooth (41b) is connected to the inner side of the tooth sleeve (42); the tooth sleeve (42) is fixed on the front template; the inner side of the tooth shaft (41) is provided with a through hole (41c); the inner side of the front end of the through hole (41c) is provided with an external thread molding portion (41d) for molding the external thread of the product; the outer periphery of the core (43) is slidably connected to the inner wall of the through hole (41c); the front end of the core (43) is provided with a hole molding portion (43a) for molding the hole of the product; and the rear end of the core (43) is fixed on the front template.
2. A front mold thread stripping mechanism according to claim 1, characterized in that: A guide frame (12) is provided at the front end of the oil cylinder (1), a guide groove (12a) is provided on the guide frame (12), and convex blocks (11a) are provided on both sides of the fixed block (11), and the convex blocks (11a) are slidably connected to the guide groove (12a).
3. A front mold thread stripping mechanism according to claim 1, characterized in that: A T-shaped guide rail (21) is provided at the lower side of the rack (2), a positioning block (22) is provided at the outer side of the T-shaped guide rail (21), a T-shaped slide groove (22a) is provided on the positioning block (22), and the T-shaped guide rail (21) is arranged in the T-shaped slide groove (22a) and is slidably connected thereto.
4. A front mold thread stripping mechanism according to claim 1, characterized in that: The transmission gear set (3) comprises a small-diameter gear (31) and a large-diameter gear (32) which are coaxially arranged; the small-diameter gear (31) is transmission-connected to the tooth surface at the upper end of the rack (2); and the large-diameter gear (32) is transmission-connected to the external gear (41a).
5. A front mold thread stripping mechanism according to claim 1, characterized in that: The leftmost and rightmost sides of the rack (2) are respectively provided with limiters (5) for feeding back the position of the rack (2).
6. A front mold thread stripping mechanism according to claim 1, characterized in that: The outer periphery of the tooth axis (41) is also slidably connected with a positioning piece (44), and the positioning piece (44) is fixed on the front template.