Large-stroke sliding block oil-cylinder-free space-saving structure

Abstract

The oil-cylinder-free space-saving structure comprises a mold, an injection molding part, a sliding groove base, an inclined core pulling assembly and a driving rack, a cavity is formed in the middle of the mold, the injection molding part is buckled in the cavity, an inclined barrel type inverted buckle is arranged on the side face of the injection molding part, the sliding groove base is further fixedly arranged on the mold and is close to the cavity, and the inclined barrel type inverted buckle is arranged on the inclined barrel type inverted buckle. An inclined sliding groove is formed in the top face of the sliding groove base, the inclined core pulling assembly is connected to the inclined sliding groove in a sliding mode, an inverted buckle mold core is arranged at the front end of the inclined core pulling assembly, the inverted buckle mold core obliquely and downwards abuts against the interior of an inclined cylinder type inverted buckle of an injection molding part, and the inverted buckle mold core is used for injection molding of the inclined cylinder type inverted buckle. A driving rack is arranged on the side face of the inclined core pulling assembly, the driving rack is in transmission connection with the inclined core pulling assembly, the driving rack can vertically move to drive the inclined core pulling assembly to move along the inclined sliding groove, and the inverted buckle mold core is pulled out of the inclined barrel type inverted buckle; a mechanical structure is adopted for reverse buckling demolding, the structure is small and exquisite, the mold does not need to be enlarged, and the production cost is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding equipment technology, specifically relating to a space-saving structure for a large-stroke slider without an oil cylinder. Background Technology

[0002] In injection molds, undercut demolding typically employs a side-pulling mechanism, such as an ejector, slider, hydraulic, or pneumatic core puller. For deeper undercuts, traditional ejector pins may fail to demold smoothly due to insufficient stroke or strength. In such cases, more complex mechanisms are needed, such as retractable sliders or hydraulic or pneumatic cylinder drives. Since hydraulic or pneumatic cylinders occupy significant space in the mold, they substantially increase mold size. If the user's injection molding machine tonnage is fixed and cannot be increased, or if a larger production machine is unavailable, and the product structure is already determined and cannot be optimized, then adding hydraulic or pneumatic cylinders is not feasible. This would render the existing injection molding machine unusable, disrupting production plans and hindering smooth progress. Redesigning the mold later would also significantly increase mold and injection molding costs. Therefore, improvements to the existing undercut core-pulling structure are necessary. Utility Model Content

[0003] To address the aforementioned problems and technical requirements, this utility model provides a space-saving, oil-free, large-stroke slider structure. This structure uses two meshing racks, where the linear motion of one rack drives the oblique linear motion of the other rack, achieving the purpose of oblique core pulling. The structure is compact, requiring no additional mold design, and can significantly reduce production costs.

[0004] The technical solution of this utility model is as follows: a large-stroke slider cylinder-free space-saving structure, comprising a mold, an injection molded part, a slide base, an inclined core-pulling assembly, and a drive rack. The mold has a cavity in the middle, in which the injection molded part is fastened. The side of the injection molded part has an inclined cylindrical undercut. The slide base is also fixed on the mold, close to the cavity. The top surface of the slide base has an inclined slide groove. The inclined core-pulling assembly is slidably connected to the inclined slide groove. The front end of the inclined core-pulling assembly has an undercut core. The undercut core is inclined downward and pushes into the inclined cylindrical undercut of the injection molded part. The undercut core is used for injection molding of the inclined cylindrical undercut. The side of the inclined core-pulling assembly has a drive rack. The drive rack and the inclined core-pulling assembly are connected by a transmission. The vertical movement of the drive rack can drive the inclined core-pulling assembly to move along the inclined slide groove, pulling the undercut core out of the inclined cylindrical undercut. This solution uses two obliquely intersecting racks to drive the slider to slide obliquely, so that the slider can pull the inverted core. The mechanical engagement and locking can ensure the strength of the core pulling and prevent backing during core pulling. In addition, the structure occupies very little space, the manufacturing cost is not high, and there is no need to enlarge the mold design, thus saving production costs.

[0005] Furthermore, the inclined core-pulling assembly includes a slider, a connecting block, and an undercut core. The slider is slidably connected in the inclined groove. The top surface of the slider has a protruding connecting block. The front end of the connecting block is fixedly connected to the undercut core. The side of the slider has a row of inclined teeth with grooves between them. The slider is connected to the drive rack through meshing between the inclined teeth.

[0006] Furthermore, the drive rack is in a vertical state, and a row of drive helical teeth is provided on the inner side of the drive rack. The drive helical teeth and the helical teeth of the slider are inclined to cross and mesh. The vertical movement of the drive helical teeth drives the slider to move along the inclined groove.

[0007] Furthermore, the drive helical teeth and the grooves of the slider are in one-to-one correspondence. When the mold is in the closed state, the first drive helical tooth at the upper end of the drive rack meshes with the first groove on the outer side of the slider. As the drive rack moves upward, before the previous drive helical tooth disengages from the groove, the next drive helical tooth enters the next groove. The drive rack moves upward, and the drive slider slides obliquely upward, pulling out the undercut core from the oblique cylindrical undercut. During the upward movement of the drive rack, it is ensured that two drive helical teeth mesh with their corresponding grooves simultaneously. Before the previous drive helical tooth disengages, the next drive helical tooth enters the groove, achieving a more stable meshing and preventing misalignment and jamming during the exchange of meshing between the helical teeth, resulting in smoother driving of the slider.

[0008] Furthermore, the slide base is provided with a vertical through hole, which is adjacent to the inclined slide groove, and the drive rack is slidably connected in the vertical through hole. The vertical through hole has a limiting effect on the drive rack, so that the vertical through hole can only move in the vertical direction.

[0009] Furthermore, the upper end of the drive rack is provided with two connecting holes. The drive rack can be connected to the upper mold through the connecting holes, so that when the upper mold opens, the drive rack can be pulled at the same time, causing the drive rack to start moving vertically.

[0010] Furthermore, a limiting block is installed at the top of the inclined slide groove on the slide base, and the limiting block limits the stroke of the slider. The limiting block can block the slider and prevent the slider from sliding out from the top of the inclined slide groove.

[0011] The beneficial effects of this utility model are as follows: This utility model sets the driving method of the large stroke slider to rack and pinion drive. The vertically set driving rack drives the undercut core to slide laterally and be pulled out from the inclined cylindrical undercut of the injection molded part. This achieves the purpose of lateral large stroke core pulling, which can realize the production of smaller injection molding machines, save mold space, simplify the mold structure, and eliminate the need to set large structures such as cylinders or hydraulic cylinders in the mold, avoiding the increase in mold size and the resulting redesign and production costs. Furthermore, since there is a one-to-one correspondence between the driving helical teeth and the groove of the slider, two driving helical teeth and grooves are always in a state of simultaneous meshing during the vertical movement of the driving rack. This ensures the stability of the slider sliding, avoids misalignment and disengagement between the helical teeth, makes the core pulling action smooth, less prone to errors, and has high demolding stability. Attached Figure Description

[0012] Figure 1 This is an overall structural diagram of the space-saving, cylinder-free, large-stroke slider structure of this utility model;

[0013] Figure 2 This is a three-dimensional view of the connection structure of the injection molded part, the inclined core-pulling assembly, and the drive rack in this utility model.

[0014] Figure 3 A side perspective view of the connection structure between the inclined core-pulling assembly and the drive rack in the mold-closed state;

[0015] Figure 4 This is a diagram showing the meshing structure between the middle part of the driving helical tooth in the driving rack and the slider.

[0016] Figure 5 Diagram showing the state where the rack and pinion are driven to rise until the inverted core and the inclined cylindrical inverted core are completely disengaged;

[0017] Figure 6 This is a three-dimensional structural diagram of the slider in this utility model;

[0018] Figure 7 This is a three-dimensional structural diagram of the drive rack in this utility model;

[0019] The components in the diagram are labeled as follows: mold 1, cavity 11, vertical through hole 12, injection part 2, inclined cylindrical undercut 21, slide base 3, inclined slide 31, limiting block 32, inclined core pulling assembly 4, undercut core 41, connecting block 42, slider 43, inclined tooth 431, tooth groove 432, drive rack 5, drive inclined tooth 51, connecting hole 52. Detailed Implementation

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

[0021] like Figure 1-7The diagram illustrates a space-saving, cylinder-free, large-stroke slider structure of this invention, comprising a mold 1, an injection molded part 2, a slide base 3, an inclined core-pulling assembly 4, and a drive rack 5. The mold 1 has a cavity 11 in its center, within which the injection molded part 2 is fitted. The side of the injection molded part 2 has an inclined cylindrical undercut 21. The slide base 3 is also fixedly mounted on the mold 1, close to the cavity 11. The top surface of the slide base 3 has an inclined slide groove 31. The inclined core-pulling assembly 4 is slidably connected to the inclined slide groove 31. An undercut core 41 is located at the front end of the inclined core-pulling assembly 4, which angles downwards and presses against the inclined cylindrical undercut 21 of the injection molded part 2. The undercut core 41 is used for injection molding the inclined cylindrical undercut 21. A limiting block 32 is installed at the top of the inclined slide groove 31 on the slide base 3, limiting the stroke of the slider 43. The limiting block 32 can block the slider 43 and prevent the slider 43 from sliding out from the top of the inclined slide groove 31.

[0022] The oblique core-pulling assembly 4 has a drive rack 5 on its side. The drive rack 5 and the oblique core-pulling assembly 4 are connected by a transmission. The vertical movement of the drive rack 5 can drive the oblique core-pulling assembly 4 to move along the oblique slide groove 31, and pull the inverted core 41 out of the oblique cylindrical inverted buckle 21.

[0023] The inclined core-pulling assembly 4 includes a slider 43, a connecting block 42, and an undercut core 41. The slider 43 is slidably connected in the inclined groove 31. The connecting block 42 protrudes from the top surface of the slider 43, and the undercut core 41 is fixedly connected to the front end of the connecting block 42. A row of helical teeth 431 is provided on the side of the slider 43, and the helical teeth 431 are connected by grooves 432. The slider 43 is connected to the drive rack 5 through the meshing of the helical teeth 431. The drive rack 5 is in a vertical state, and a row of drive helical teeth 51 is provided on the inner side of the drive rack 5. The drive helical teeth 51 and the helical teeth 431 of the slider 43 are inclined and cross-meshingly connected. The vertical movement of the drive helical teeth 51 drives the slider 43 to move along the inclined groove 31.

[0024] The slide base 3 is provided with a vertical through hole 12, which is adjacent to the inclined slide groove 31. The drive rack 5 is slidably connected in the vertical through hole 12. The vertical through hole 12 has a limiting effect on the drive rack 5, so that the vertical through hole 12 can only move in the vertical direction. The upper end of the drive rack 5 is provided with two connecting holes 52. The drive rack 5 can be connected to the upper mold through the connecting holes 52. In this way, as the upper mold opens, the drive rack 5 can be pulled at the same time, causing the drive rack 5 to start vertical movement.

[0025] The drive helical teeth 51 and the tooth grooves 432 of the slider 43 are in one-to-one correspondence. When the mold 1 is in the closed state, the first drive helical tooth 51 at the upper end of the drive rack 5 meshes with the first tooth groove 432 on the outer side of the slider. As the drive rack 5 moves upward, before the previous drive helical tooth 51 disengages from the tooth groove 432, the next drive helical tooth 51 enters the next tooth groove 432. The drive rack 5 moves upward, and the drive slider 43 slides obliquely upward, pulling out the undercut core 41 from the oblique cylindrical undercut 21.

[0026] The working principle of this utility model is as follows: When the mold 1 is opened, the upper mold pulls the drive rack 5 up and down. The drive rack 5 moves upward in the vertical through hole 12. The drive helical teeth 51 and the helical teeth 431 of the slider 43 mesh. During the upward process of the drive rack 5, it is ensured that the two drive helical teeth 51 mesh with the corresponding tooth grooves 432 at the same time. Before the previous drive helical tooth 51 disengages, the next drive helical tooth enters the tooth groove, which can achieve a more stable meshing stability and prevent misalignment and jamming when the helical teeth 431 exchange meshing. As the drive rack 5 continues to move upward, the helical teeth 431 on the side of the slider 43 move obliquely upward through the drive rack 5 one by one. The slider 43 pulls the undercut core 41 through the connecting hole 52 and pulls it out along the oblique slide groove 31 until the undercut core 41 is completely disengaged from the oblique cylindrical undercut 21, thus completing the demolding of the undercut.

[0027] The above descriptions are merely several preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any variations and substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A space-saving, cylinder-free, long-stroke slider structure, characterized in that: The mold comprises a mold, an injection molded part, a slide base, an inclined core-pulling assembly, and a drive rack. The mold has a cavity in the middle, into which the injection molded part is fitted. The side of the injection molded part has an inclined cylindrical undercut. A slide base is also fixed to the mold, close to the cavity. The top surface of the slide base has an inclined slide groove. The inclined core-pulling assembly is slidably connected to the inclined slide groove. The front end of the inclined core-pulling assembly has an undercut core that angles downwards and presses against the inclined cylindrical undercut of the injection molded part. The undercut core is used for injection molding the inclined cylindrical undercut. A drive rack is located on the side of the inclined core-pulling assembly. The drive rack is connected to the inclined core-pulling assembly via a transmission connection. The vertical movement of the drive rack drives the inclined core-pulling assembly to move along the inclined slide groove, pulling the undercut core out of the inclined cylindrical undercut.

2. The space-saving, cylinder-free, large-stroke slider structure according to claim 1, characterized in that: The inclined core-pulling assembly includes a slider, a connecting block, and an undercut core. The slider is slidably connected in the inclined groove. The top surface of the slider has a protruding connecting block. The front end of the connecting block is fixedly connected to the undercut core. The side of the slider has a row of inclined teeth with grooves between them. The slider is connected to the drive rack through meshing between the inclined teeth.

3. The space-saving, cylinder-free, large-stroke slider structure according to claim 2, characterized in that: The drive rack is in a vertical position, and a row of drive helical teeth is provided on the inner side of the drive rack. The drive helical teeth and the helical teeth of the slider are connected by inclined cross meshing. The vertical movement of the drive helical teeth drives the slider to move along the inclined groove.

4. The space-saving, cylinder-free, large-stroke slider structure according to claim 3, characterized in that: The drive helical teeth and the tooth grooves of the slider are in one-to-one correspondence. When the mold is in the closed state, the first drive helical tooth at the upper end of the drive rack meshes with the first tooth groove on the outer side of the slider. As the drive rack moves upward, before the previous drive helical tooth disengages from the tooth groove, the next drive helical tooth enters the next tooth groove. The drive rack moves upward, and the drive slider slides obliquely upward to pull out the undercut core of the oblique cylindrical undercut.

5. The space-saving, cylinder-free, large-stroke slider structure according to claim 4, characterized in that: The slide base is provided with a vertical through hole, which is adjacent to the inclined slide groove, and the drive rack is slidably connected in the vertical through hole.

6. The space-saving, cylinder-free, large-stroke slider structure according to claim 5, characterized in that: The upper end of the drive rack has two connecting holes.

7. The large-stroke slider cylinder-free space-saving structure according to claim 6, characterized in that: A limit block is installed on the top of the inclined slide on the slide base, and the limit block limits the stroke of the slide block.

Images