Integrated mold quick-change front-loading core structure
By designing an integrated mold quick-change front-mounted core structure, the problems of long mold disassembly time and aluminum liquid entering the mold when the core is damaged are solved, realizing quick core replacement and sealing, and improving the service life of the mold and production efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENZHI (CHONGQING) LIGHTWEIGHT TECHNOLOGY CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-06-23
AI Technical Summary
When the core in the existing die-casting mold is damaged, the mold disassembly and replacement takes a long time. The gap between the core sleeve and the mold core is large, which causes molten aluminum to enter the gap of the mold and cause damage. In addition, the core is difficult to install and remove.
A quick-change front-mounted core structure for integrated molds is designed, which uses coaxial through holes for inserts and mold cores. The core sleeve has a flat square structure and is fixed by threaded connection to ensure concentricity and sealing, and to prevent molten aluminum from entering the mold.
It enables quick core replacement and sealing, reduces production interruptions and maintenance costs, and improves mold life and production efficiency.
Smart Images
Figure CN224389954U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of die casting molds, specifically to an integrated mold quick-change front-mounted core structure. Background Technology
[0002] Die casting is a metal forming process that uses high pressure to rapidly inject liquid or semi-liquid metal into a precision mold cavity. Under pressure, the metal cools and solidifies, resulting in high-precision, high-performance metal parts. The die casting mold is one of the three essential elements of die casting, playing a crucial role. The core is a vital component of the mold and is considered a consumable part, destined to fail within its lifespan. Large, integrated molds are heavy, and the process of installing and removing the mold takes a considerable amount of time. If the core is damaged during production, disassembling and replacing it would significantly delay production. Existing front-mounted quick-change cores are typically screwed into the rear core sleeve via threads. However, there is no designed mating section between the core sleeve and the core, resulting in a large gap and poor concentricity between the core sleeve and the core hole on the core. High mold temperatures during production make core installation and removal difficult. If the core breaks during production, molten aluminum can seep through the gap between the core sleeve and the core into the gaps between various components on the mold frame, causing mold damage and halting production. Summary of the Invention
[0003] The purpose of this invention is to address the shortcomings of existing technologies by providing an integrated quick-change front-mounted core structure for molds. This core structure is simple, meets the positioning requirements of the core, and achieves a core sleeve seal, preventing molten aluminum from entering the mold frame.
[0004] The purpose of this utility model is achieved by the following solution: an integrated mold quick-change front-mounted core structure, including an insert, a mold core disposed on the left side of the insert, a first core mounting through hole longitudinally penetrating the insert at the upper end of the insert, and a second core mounting through hole longitudinally penetrating the mold core at the upper end of the mold core. The centers of the first core mounting through hole and the second core mounting through hole are located on the same axis and are interconnected. The first core mounting through hole is a stepped through hole, and the rear end of the first core mounting through hole is a large-diameter section. The front end of the first core mounting through hole is a small diameter section, and the front end of the second core mounting through hole is a countersunk hole. The front small diameter section of the first core mounting hole and the rear diameter of the second core mounting hole are the same. A core sleeve is installed in the first core mounting through hole and the second core mounting through hole. The top end of the core sleeve is a flat rectangular structure. The top end of the core sleeve is fixed in the countersunk hole at the front end of the second core mounting through hole. The large diameter end of the core sleeve is fixed in the large diameter section at the rear end of the first core mounting through hole. The front end of the core sleeve is connected and fixed to the front-mounted core.
[0005] The core sleeve has a threaded section in the inner hole at the front end, and the lower end of the front-mounted core has a thread on its outer circumference. The lower end of the front-mounted core extends into the inner hole of the core sleeve and is threadedly connected and fixed to the core sleeve.
[0006] The upper end of the front-mounted core is a large-diameter section, and the outer diameter of the upper end of the front-mounted core is larger than the inner diameter of the core sleeve. The middle and lower sections of the front-mounted core are assembled in the inner hole of the core sleeve, and the lower end face of the large-diameter section of the front-mounted core is in close contact with the top end face of the core sleeve.
[0007] The advantages of this utility model are as follows: Since the front end of the core sleeve is a flat square structure and is fixed in the countersunk hole of the mold core, the core sleeve and the mold core will not swing or misalign when the front-mounted core is replaced. The front-mounted core can be easily and repeatedly disassembled and reassembled, which is convenient and quick. The core sleeve and the front-mounted core have a small gap mating surface. When the core breaks, the aluminum liquid will not enter the mold back plate through the gap and cause mold failure. The core breakage can be quickly recovered, reducing production and maintenance costs. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the structure of this utility model;
[0009] Figure 2 This is a schematic diagram of the core structure;
[0010] Figure 3 This is a sectional view of the core along the BB direction. Detailed Implementation
[0011] like Figures 1 to 3As shown, an integrated mold quick-change front-mounted core structure includes an insert 2, a mold core 1 disposed on the left side of the insert 2, a first core mounting through hole 2-1 longitudinally penetrating the upper end of the insert 2, and a second core mounting through hole 1-1 longitudinally penetrating the upper end of the mold core 1. The centers of the first core mounting through hole 2-1 and the second core mounting through hole 1-1 are located on the same axis and are interconnected. The first core mounting through hole 2-1 is a stepped through hole, with a large diameter section at the rear end and a large diameter section at the front end. The first core mounting hole 2-1 has a small diameter section. The front end of the second core mounting through hole 1-1 is a countersunk hole. The small diameter section of the front end of the first core mounting hole 2-1 has the same diameter as the rear end of the second core mounting hole 1-1. A core sleeve 3 is installed in both the first and second core mounting through holes 2-1. The top end of the core sleeve 3 has a flat rectangular structure and is fixed in the countersunk hole at the front end of the second core mounting through hole 1-1. The large diameter end of the core sleeve 3 is fixed in the large diameter section at the rear end of the first core mounting through hole 2-1. The front end of the core sleeve 3 is connected and fixed to the front-mounted core 4. A threaded section is provided in the inner hole of the front end of the core sleeve 3. A thread is provided on the outer circumference of the lower end of the front-mounted core 4. The lower end of the front-mounted core 4 extends into the inner hole of the core sleeve 3 and is threadedly connected and fixed to the core sleeve 3. The upper end of the front-mounted core 4 is a large-diameter section, and the outer diameter of the upper end of the front-mounted core 4 is larger than the inner diameter of the core sleeve 3. The middle and lower sections of the front-mounted core 4 are assembled in the inner hole of the core sleeve 3, and the lower end face of the large-diameter section of the front-mounted core 4 is tightly fitted with the top end face of the core sleeve 3.
[0012] The tail and top ends of the core sleeve are fixed in the insert and mold core, respectively. The insert and mold core together position the core sleeve. The front-mounted core is inserted from the front end of the mold core and connected and fixed to the core sleeve. The lower end and middle section of the front-mounted core mate with the inner hole of the core sleeve. The core sleeve and the front-mounted core have high concentricity, and the outer diameter of the upper end of the front-mounted core is larger than the inner diameter of the inner hole of the core sleeve. The lower end face of the large-diameter section of the front-mounted core fits tightly with the top end face of the core sleeve. If the core is damaged, there will be no wobbling when replacing the core, allowing for quick replacement. Furthermore, due to the mating section between the core and the mold core, aluminum will not enter the mold through the gap between the core and the mold core, causing mold damage.
[0013] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. An integrated mold quick-change front-mounted core structure, comprising an insert (2), a mold core (1) disposed on the left side of the insert (2), a first core mounting through hole (2-1) longitudinally penetrating the insert (2) being disposed at the upper end of the insert (2), and a second core mounting through hole (1-1) longitudinally penetrating the mold core (1) being disposed at the upper end of the mold core (1), wherein the centers of the first core mounting through hole (2-1) and the second core mounting through hole (1-1) are located on the same axis and are interconnected, characterized in that: The first core mounting through hole (2-1) is a stepped through hole. The rear end of the first core mounting through hole (2-1) is a large diameter section, and the front end of the first core mounting through hole (2-1) is a small diameter section. The front end of the second core mounting through hole (1-1) is a countersunk hole. The small diameter section at the front end of the first core mounting through hole (2-1) is the same as the diameter at the rear end of the second core mounting through hole (1-1). A core sleeve (3) is installed in the first core mounting through hole (2-1) and the second core mounting through hole (1-1). The top end of the core sleeve (3) is a flat rectangular structure. The top end of the core sleeve (3) is fixed in the countersunk hole at the front end of the second core mounting through hole (1-1). The large diameter end of the tail end of the core sleeve (3) is fixed in the large diameter section at the rear end of the first core mounting through hole (2-1). The front end of the core sleeve (3) is connected and fixed to the front core (4).
2. The integrated mold quick-change front-mounted core structure according to claim 1, characterized in that: The core sleeve (3) has a threaded section in the inner hole at the front end, and the lower end of the front core (4) has a thread on its outer circumference. The lower end of the front core (4) extends into the inner hole of the core sleeve (3) and is threadedly connected and fixed to the core sleeve (3).
3. The integrated mold quick-change front-mounted core structure according to claim 1, characterized in that: The upper end of the front-mounted core (4) is a large-diameter section. The outer diameter of the upper end of the front-mounted core (4) is larger than the inner diameter of the core sleeve (3). The middle and lower ends of the front-mounted core (4) are assembled in the inner hole of the core sleeve (3). The lower end face of the large-diameter section of the front-mounted core (4) is closely fitted with the top end face of the core sleeve (3).