A steel blank structure facilitating replacement of a core

Abstract

The utility model relates to a steel material mould technology field especially, more particularly to a steel material mould blank structure convenient to replace mould core, including the mould core with locking hole is seted up in the mould plate, the piston long cavity and the middle cavity that are linked to each other are seted up in the mould plate, the mould plate is seted up in the mould core's casing cavity, the driven piston bolt that extends to the casing cavity and corresponds the locking hole is slidably seted up in the piston long cavity lower end opening, the mould plate is through the middle cavity and is used for setting the limiting portion of fixed driven piston bolt, the utility model sets up the casing cavity in the mould plate with the piston long cavity that is symmetrical left and right in the mould core, sets up the middle cavity of the front and back trend in the mould plate, utilizes the traction turntable to drive the two drive push rods to be opposite or reverse, further makes the steering swing link to deflect, makes the limiting insert be able to carry out horizontal telescopic, thereby further limiting fixed to the driven piston bolt that butts the mould core.

Description

Technical Field

[0001] This utility model relates to the field of steel mold technology, and in particular to a steel mold blank structure that facilitates the replacement of mold cores. Background Technology

[0002] In the mold manufacturing industry, such as injection molding and die casting, the mold blank, as the core component that supports and fixes the forming mold core, directly affects production efficiency, product quality, and mold lifespan due to its structural rationality. In actual production, especially in multi-variety, small-batch manufacturing models, it is often necessary to frequently change different mold cores on a set of mold blanks to adapt to the production needs of different products.

[0003] Existing molds, such as the one disclosed in CN221112689U, which is an integrated molding mold for polypropylene infusion bottle preforms, allow for quick disassembly and replacement of the mold core via a disassembly assembly. This allows for changing the mold core according to the required size or shape of the infusion bottle to be produced. However, the connection between the screw and the threaded tube is a rigid connection. Under long-term, high-cycle injection pressure and clamping force, stress concentration is prone to occur at the root of the thread, which may lead to fatigue cracks. Furthermore, once the thread pair is contaminated, it is extremely prone to wear and even stripping. Once the thread is damaged, the threaded holes on the entire mold core or template need to be repaired or replaced, relying solely on the self-locking property of the thread pair to prevent loosening. Under strong vibration and cyclic impact loads of the mold, there is a risk of thread loosening. Utility Model Content

[0004] The purpose of this utility model is to solve the problem of inconvenience in using the existing technology where the template and the core are fixed together, and to propose a steel mold blank structure that facilitates the replacement of the core.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A steel mold blank structure for easy mold core replacement includes a template and a mold core with a locking hole. The template has a connected piston elongated cavity and a middle cavity. The template also has a fitting cavity for fitting the mold core. A driven piston pin extending into the fitting cavity and corresponding to the locking hole is slidably fitted in the lower opening of the piston elongated cavity. The template has a limiting part for fixing the driven piston pin through the middle cavity.

[0007] Preferably, the piston has two long chambers, which are symmetrically distributed on the left and right sides of the housing cavity.

[0008] Preferably, the central cavity is arranged in a front-to-back direction, and both ends of the central cavity are connected to the lower opening of the piston's long cavity.

[0009] Preferably, the limiting part includes an elastic drive piston that is movably fitted into the upper opening of the piston's long cavity and extends into the fitting cavity to movably abut against the mold core. A traction turntable is rotatably installed in the middle cavity, and drive push rods that are movably pulled by the traction turntable are slidably installed in both ends of the middle cavity. Steering rocker arms that are movably connected to the drive push rods are rotatably installed in both ends of the middle cavity. Limiting inserts that are movably connected to the steering rocker arms and fixedly abut against the driven piston pins are slidably installed in both ends of the middle cavity.

[0010] Preferably, the driven piston pin has a limiting slot for a corresponding limiting insert.

[0011] Preferably, the traction turntable is connected to an eccentrically arranged traction link by a pin, and the traction link is connected to the drive push rod pin.

[0012] Preferably, a first traction bolt is integrally connected to the drive push rod, and a first traction long hole for movably fitting the first traction bolt is opened in the upper end of the steering rocker arm, and a second traction long hole is opened in the lower end of the steering rocker arm, and a second traction bolt for movably fitting into the second traction long hole is connected to the limiting plug.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. This utility model fits the mold core into the fitting cavity of the template, and opens a symmetrical piston cavity in the template to facilitate the setting of an elastic drive piston and a driven piston pin that are driven by the mold core and initially limit the position of the mold core.

[0015] 2. This utility model has a central cavity with a front-to-back orientation in the template. The traction turntable drives the two drive push rods in opposite directions, thereby causing the steering rocker to deflect and the limiting plug to extend and retract horizontally, thus further limiting and fixing the driven piston pin that abuts the mold core. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a steel mold blank structure that facilitates mold core replacement, as proposed in this utility model.

[0017] Figure 2 This is a bottom view of a steel mold blank structure that facilitates mold core replacement, as proposed in this utility model.

[0018] Figure 3 This is a front sectional view of a steel mold blank structure that facilitates mold core replacement, as proposed in this utility model.

[0019] Figure 4 This is a top sectional view of a steel mold blank structure that facilitates mold core replacement, as proposed in this utility model.

[0020] Figure 5This is a side sectional view of a steel mold blank structure that facilitates mold core replacement, as proposed in this utility model.

[0021] Figure 6 This is an enlarged schematic diagram of part A of a steel mold blank structure that facilitates mold core replacement, as proposed in this utility model.

[0022] Figure 7 This is an enlarged schematic diagram of part B of a steel mold blank structure that facilitates mold core replacement, as proposed in this utility model.

[0023] Figure 8 This is an enlarged schematic diagram of part C of a steel mold blank structure that facilitates mold core replacement, as proposed in this utility model.

[0024] In the diagram: 1. Template; 2. Mold core; 3. Locking hole; 4. Piston long chamber; 5. Middle chamber; 6. Limiting part; 61. Elastic drive piston; 62. Driven piston pin; 63. Traction turntable; 64. Drive push rod; 65. Steering rocker arm; 66. Limiting plug; 67. Limiting slot. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figures 1-8 A steel mold blank structure for easy core replacement includes a template 1 and a mold core 2 with locking holes 3. The template 1 has a connected piston elongated cavity 4 and a middle cavity 5, and a fitting cavity for mounting the mold core 2. In some embodiments, the template 1 serves as the foundation and carrier of the entire structure, typically an upper template or a movable template, with a lifting frame or base integrally connected to its outer end, and an integrated drive and locking structure. The mold core 2, as the core component of the molded product, is fixedly installed through the locking holes 3. The fitting cavity, located within the template 1, precisely accommodates and positions the mold core 2; its shape matches the outer shape of the mold core 2 to ensure accurate positioning after installation.

[0027] A driven piston pin 62, which extends into the sleeve cavity and corresponds to the locking hole 3, is slidably fitted in the lower opening of the piston long cavity 4. The template 1 is provided with a limiting part 6 for fixing the driven piston pin 62 through the middle cavity 5. In some embodiments, the limiting part 6 includes an elastic drive piston 61 that is movably fitted into the upper opening of the piston long cavity 4 and extends into the fitting cavity to movably abut against the mold core 2. One end of the elastic drive piston 61, which is fitted with a rubber ring, extends into the fitting cavity and movably abuts against the top of the mold core 2. At the same time, it is usually provided with a strong spring to provide downward initial pressure. A traction turntable 63 is rotatably installed in the middle cavity 5. A drive motor for driving the traction turntable 63 to rotate horizontally and fix it can be configured on the template 1, or the traction turntable 63 can be fixed by manually driving it and then using locking bolts to adjust the rotation to a certain angle. Drive push rods 64 that are movably pulled by the traction turntable 63 are slidably installed in both ends of the middle cavity 5. Steering rocker arms 65 that are movably connected to the drive push rods 64 are rotatably installed in both ends of the middle cavity 5. Limiting plugs 66 that are movably connected to the steering rocker arms 65 and fixedly abut against the driven piston pins 62 are slidably installed in both ends of the middle cavity 5.

[0028] The mold core 2 is made loose due to vibration or injection pressure during production, which is a double insurance mechanism of locking with pins and anti-retraction plugs. This ensures the stability and safety of the mold operation.

[0029] The limiting part 6 is built into the template 1, without taking up extra space, which helps to keep the overall cleanliness and rigidity of the mold blank.

[0030] To further explain, the driven piston pin 62 is slidably installed in the lower end opening of the piston long cavity 4. When the elastic drive piston 61 is pressed down, it can extend downward and insert into the locking hole 3 of the mold core 2 to complete the initial positioning and mechanical locking of the mold core 2.

[0031] There are two piston long chambers 4, and the two piston long chambers 4 are symmetrically distributed on the left and right sides of the assembly cavity. The symmetrical layout ensures that the locking force applied to the mold core 2 from both sides is balanced, preventing the mold core 2 from tilting due to force on one side. The upper and lower ends of the piston long chambers 4 are provided with openings.

[0032] The central cavity 5 is arranged in a front-to-back direction, and both ends of the central cavity 5 are connected to the lower openings of the piston long cavity 4. The central cavity 5 is located between the two piston long cavities 4, and its lower end is connected to the lower openings of the two piston long cavities 4, forming an "I" or "H" shaped internal channel network, providing installation space for the limiting part 6.

[0033] The driven piston pin 62 has a limit slot 67 corresponding to the limit plug 66.

[0034] A traction link is eccentrically mounted on the traction turntable 63, and the traction link is also connected to the drive push rod 64 via a pin. When the traction turntable 63 rotates, the traction link converts the rotational motion into linear motion, meaning that the rotation of the traction turntable 63 drives the two drive push rods 64 to perform synchronous linear motion in opposite directions.

[0035] A first traction bolt is integrally connected to the drive push rod 64, and a first traction elongated hole is provided in the upper end of the steering rocker 65, which is movably fitted with the first traction bolt. When the drive push rod 64 moves horizontally, the steering rocker 65 is driven to deflect by sliding the first traction bolt in the first traction elongated hole. A second traction elongated hole is provided in the lower end of the steering rocker 65, and a second traction bolt is connected to the limiting plug 66, which is movably fitted in the second traction elongated hole. When the steering rocker 65 deflects, its lower end pushes or pulls the limiting plug 66 laterally through the second traction elongated hole.

[0036] It should be noted that the specific model and specifications of template 1 and core 2 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be elaborated here.

[0037] The functional principle of this utility model can be explained through the following operation methods:

[0038] Select a suitable mold core 2, push the mold core 2 into the fitting cavity of the template 1, and apply pressure to the elastic drive piston 61 so that the driven piston pin 62 extends into the fitting cavity until it is fitted and connected with the locking hole 3.

[0039] The drive traction turntable 63 rotates horizontally, and through the traction linkage, it drives the two drive push rods 64 to move in opposite directions. The drive push rods 64 apply pressure to the upper end of the steering rocker 65 to cause it to deflect. The lower end of the steering rocker 65 drives the limit plugs 66 on both sides to move towards each other until they are connected to the limit slot 67 of the driven piston pin 62.

[0040] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A steel mold blank structure for easy core replacement, comprising a template (1) and a mold core (2) having a locking hole (3), characterized in that, The template (1) has a connected piston elongated cavity (4) and a middle cavity (5). The template (1) has a fitting cavity for fitting the mold core (2). The piston elongated cavity (4) has a slidingly fitted driven piston pin (62) extending into the fitting cavity and corresponding to the locking hole (3). The template (1) has a limiting part (6) for fixing the driven piston pin (62) through the middle cavity (5).

2. The steel mold blank structure for easy core replacement according to claim 1, characterized in that, The piston has two long chambers (4), and the two piston long chambers (4) are symmetrically distributed on the left and right sides of the housing cavity.

3. The steel mold blank structure for easy core replacement according to claim 2, characterized in that, The central cavity (5) is arranged in a front-to-back direction, and both ends of the central cavity (5) are connected to the lower opening of the piston long cavity (4).

4. The steel mold blank structure for easy core replacement according to claim 3, characterized in that, The limiting part (6) includes an elastic drive piston (61) that is movably fitted into the upper opening of the piston long cavity (4) and extends into the fitting cavity to movably abut against the mold core (2). A traction turntable (63) is rotatably installed in the middle cavity (5), and a drive push rod (64) that is movably pulled by the traction turntable (63) is slidably installed in both ends of the middle cavity (5). A steering rocker (65) that is movably connected to the drive push rod (64) is rotatably installed in both ends of the middle cavity (5). A limiting plug (66) that is movably connected to the steering rocker (65) and fixedly abuts against the driven piston pin (62) is slidably installed in both ends of the middle cavity (5).

5. A steel mold blank structure for easy core replacement according to claim 4, characterized in that, The driven piston pin (62) has a limiting slot (67) corresponding to the limiting plug (66).

6. The steel mold blank structure for easy core replacement according to claim 5, characterized in that, The traction turntable (63) is connected to an eccentrically arranged traction link by a pin, and the traction link is connected to the drive push rod (64) by a pin.

7. A steel mold blank structure for easy core replacement according to claim 6, characterized in that, The drive push rod (64) is integrally connected with a first traction bolt, and the upper end of the steering rocker (65) is provided with a first traction long hole for movably fitting the first traction bolt. The lower end of the steering rocker (65) is provided with a second traction long hole, and the limiting plug (66) is connected with a second traction bolt that is movably fitted into the second traction long hole.

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