WO2022236958A1

WO2022236958A1 - Mold having tunnel core-pulling slider

Info

Publication number: WO2022236958A1
Application number: PCT/CN2021/107224
Authority: WO
Inventors: 李卫荣; 谢启金; 王贵; 陈学民; 庞栋; 唐国平; 杨潘; 李艳芳
Original assignee: 东莞宜安科技股份有限公司
Priority date: 2021-05-13
Filing date: 2021-07-20
Publication date: 2022-11-17
Also published as: CN215237718U

Abstract

A mold having a tunnel core-pulling slider, comprising a rear mold (1) and at least one core-pulling assembly (2). The rear mold comprises a rear mold core (11) and a rear mold frame (12); the rear mold frame is connected to the periphery of the rear mold core; at least one tunnel is provided in the rear mold core; the core-pulling assembly comprises a core-pulling slider (21), a guide post (22), and a slider seat (23); one end of the core-pulling slider is disposed in the inner cavity of the slider seat, and the other end of the core-pulling slider is movably disposed in the tunnel; at least one spray hole (13) is communicated on the tunnel; the slider seat and the rear mold frame are both provided with through holes; the guide post is movably inserted in the two through holes. After the mold is opened, a release agent is directly sprayed on the core-pulling slider from the spray hole to lubricate and cool the core-pulling slider, so as to avoid the occurrence of sand holes in a product caused by the sticking of the core-pulling slider, thereby effectively improving product quality.

Description

A mold with a tunnel core-pulling slider

technical field

The application relates to the technical field of molds, in particular to a mold with a tunnel core-pulling slider.

Background technique

Die-casting mold is a method of casting liquid die forging. The basic process is: the molten metal is first filled into the cavity of the mold by low-speed or high-speed casting. The mold has a movable cavity surface, which increases with the cooling process of the molten metal. Press forging not only eliminates the shrinkage cavity and porosity defects of the blank, but also makes the internal structure of the blank reach the broken grains of the forged state, so that the comprehensive mechanical properties of the blank are significantly improved.

With the continuous development of magnesium and aluminum alloy die-casting molding technology, the reduction of manufacturing costs and breakthroughs in processing technology in the die-casting industry, the performance of magnesium and aluminum alloys produced by die-casting is getting better and better, gradually meeting the needs of more application scenarios, and the market demand Also getting bigger and bigger. Because of this, in order to meet the industry requirements of various application fields and adapt to the market, die-casting products will have more complex structures and more precise dimensions.

Some die-casting structural parts have complex structures, and the appearance requirements and assembly requirements are extremely strict, which greatly increases the difficulty of mold design. Tunnel core-pulling is a relatively common side core-pulling structure. However, due to the impact of product structure on some tunnel core-pulling in the deep cavity and deep ribs, the core-pulling slider cannot be demoulded in time during the production process, and the core-pulling slider is easy to stick to the mold and get stuck, resulting in sand holes. In order to reduce manufacturing costs, improve production efficiency, and ensure product quality, the following mold with a tunnel core-pulling slider is proposed.

application content

In view of the above existing problems, the purpose of the present application is to provide a mold with a tunnel core-pulling slider to improve production efficiency and product quality.

In order to achieve the above object, the application provides the following technical solutions:

A mold with a tunnel core-pulling slider, comprising a rear mold and at least one core-pulling assembly, the rear mold includes a rear mold core and a rear mold frame, the rear mold frame is connected to the periphery of the rear mold core, the At least one tunnel is arranged in the rear mold core;

The core-pulling assembly includes a core-pulling slider, a guide post and a slider seat, one end of the core-pulling slider is arranged in the inner cavity of the slider seat, and the other end of the core-pulling slider is movably arranged in the inner cavity of the slider seat. In the tunnel, at least one spray hole is communicated with the tunnel;

Both the slider seat and the rear mold frame are provided with through holes, and the guide posts are movably inserted in the two through holes.

Preferably, one end of the slider seat close to the core-pulling slider is provided with a slot, and one end of the core-pulling slider is clamped in the slot.

Preferably, the inclination between the guide post and the slider seat is 30°-75°.

Preferably, the tunnel is provided with a plurality of spray holes, and the spray holes are spaced at the same distance.

Preferably, it also includes a front mold, the front mold includes a front mold core, the front mold core matches the rear mold core, and the product to be die-cast is formed between the front mold core and the rear mold core after mold closing cavity.

Preferably, the core-pulling assembly further includes an anti-feeding pin, the anti-feeding pin is arranged on the front mold core, and the anti-feeding pin cover is set on the spray hole after the mold is closed .

Preferably, the rear mold core is provided with an inlet gate and a gate outlet near the top of the front mold core, and a heating assembly is provided on the top surface of the front mold core away from the rear mold core, and the heating assembly The area at least covers the cavity of the product to be die-cast.

Preferably, the heating assembly is a coil formed by winding a wire, the wire is connected to the top surface of the front mold core, and the two ends of the coil are respectively used as positive and negative poles for connection to an external power supply.

Compared with the prior art, the present application has the following beneficial effects:

The mold with the tunnel core-pulling slider provided by this application includes a rear mold and a core-pulling assembly, a tunnel is arranged in the rear mold core, and the core-pulling assembly includes a core-pulling slider, a guide post and a slider seat, and the guide post is movably inserted. On the slider seat and the rear mold frame, at least one spray hole is connected to the tunnel. After the mold is opened, the release agent is directly sprayed on the core-pulling slider from the spray hole to lubricate and cool the core-pulling slider. When the guide post is pulled out from the slider seat, it drives the slider seat to move outward, and the slider seat drives the core-pulling slider to move in the tunnel, so that the core-pulling slider completes the core-pulling action and cools the core-pulling slider in time. The block prevents the core-pulling slider from sticking to the mold and causing sand holes in the product, which effectively improves the product quality and improves the operating efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a schematic diagram of the rear mold structure of a mold with a tunnel core-pulling slider provided in the embodiment of the present application;

Fig. 2 is a schematic diagram of the mold clamping structure provided by the embodiment of the present application with a tunnel core-pulling slider;

Fig. 3 is a structure diagram of the product to be die-casted provided by the embodiment of the present application.

[Description of figure numbers]: rear mold 1, core-pulling assembly 2, front mold 3, core-pulling groove 4;

Rear mold core 11, rear mold frame 12, spray hole 13, core-pulling slider 21, guide post 22, slider seat 23, anti-feed insert needle 24, front mold core 31, front mold frame 32

Detailed ways

In order to make the purpose, features, and advantages of the application more obvious and understandable, the technical solutions in the embodiments of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the application. Obviously, the following description The embodiments are only some of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

In the description of this application, it is to be understood that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be an intervening component at the same time. When a component is said to be "set on" another component, it can be set directly on another component or there may be a centered component at the same time.

The technical solution of the present application will be further described below in conjunction with the accompanying drawings and through specific implementation methods.

Please refer to Figures 1-2, the present application provides a mold with a tunnel core-pulling slider, including a rear mold 1 and at least one core-pulling assembly 2, the rear mold 1 includes a rear mold kernel 11 and a rear mold frame 12, the rear mold The mold frame 12 is connected to the periphery of the rear mold core 11, and at least one tunnel is arranged in the rear mold core 11;

The core-pulling assembly 2 includes a core-pulling slider 21, a guide post 22 and a slider seat 23, one end of the core-pulling slider 21 is arranged in the inner cavity of the slider seat 23, and the other end of the core-pulling slider 21 is movably arranged in the tunnel , the tunnel is provided with at least one spray hole 13, and the spray hole 13 communicates with the tunnel;

Both the slider base 23 and the rear mold frame 12 are provided with through holes, and the guide posts 22 are movably inserted in the two through holes.

The mold of this embodiment is used for die-casting the product shown in Figure 3. The product to be die-casted includes two core-pulling grooves 4 to be formed. The mold includes two tunnels and two core-pulling assemblies 2. One tunnel corresponds to one core-pulling assembly 2. There is a spray hole 13.

Specifically, after the mold is closed, one end of the core-pulling slider 21 is at the position of the core-pulling groove 4 of the product to be die-casted, and the guide post 22 is inserted on the slider seat 23 and the rear mold frame 12 . After the product is die-casted and the mold is opened, the mold release agent is directly sprayed on the core-pulling slider 21 from the spray hole 13 to lubricate and cool the core-pulling slider 21. When the guide post 22 is pulled out from the slider seat 23, it will drive the slider seat 23 to move outward, and the slider seat 23 will drive the core-pulling slider 21 to move in the tunnel, thereby pulling out The core slider 21 completes the core-pulling action, which prevents the core-pulling slider from sticking to the mold and causing sand holes in the product, thereby ensuring product quality and improving production efficiency.

The spray hole 13 is set on the tunnel, which effectively solves the problem that the mechanical spray nozzle cannot go deep into the cavity to carry out spray lubrication and cooling on the core-pulling slider. In addition, the mold can also be blown through the spray hole 13 to remove some remaining scrap in the tunnel and prevent the core-pulling slider 21 from being stuck. The mold with the tunnel core-pulling slider of this embodiment has been successfully applied to actual products, and the mold sticking defect rate of the core-pulling slider has been greatly reduced from 100% to 0%, which effectively reduces the production cost.

In an optional embodiment, a slot is provided at one end of the slider seat 23 close to the core-pulling slider 21 , and one end of the core-pulling slider 21 is clamped in the slot.

In an optional embodiment, the inclination between the guide post 22 and the slider seat 23 is 30°-75°, preferably, the inclination between the guide post 22 and the slider seat 23 is 15°-25°. When the guide post 22 is pulled out obliquely upward, the slider seat 23 gradually moves outwards in a buffered manner, which avoids damage to the die-casted product when the slider seat 23 is pulled out quickly.

Different numbers of spray holes 13 are selected according to the actual length of the core-pulling slider 21 . In an optional embodiment, a plurality of spray holes 13 are arranged on the tunnel, and the distance between the spray holes 13 is the same. Optionally, two spray holes 13 are arranged on the tunnel, one spray hole 13 is used for spraying the release agent, and the other spray hole 13 is used for spraying air.

In an optional embodiment, the mold further includes a front mold 3 , the front mold 3 includes a front mold core 31 and a front mold frame 32 , and the front mold frame 32 is connected to the periphery of the front mold core 31 . The front mold core 31 is matched with the rear mold core 11, and the cavity of the die-casting product is formed between the bottom of the front mold core 31 and the top of the rear mold core 11 after mold closing.

In order to prevent scraps from flying into the tunnel during the die-casting process, in an optional embodiment, the core pulling assembly 2 also includes an anti-feed insert 24, which is arranged on the front mold core 31, After mold closing, the anti-feeding insert 24 is covered on the spray hole 13, and the anti-feed insert 24 blocks the spray hole 13.

In an optional embodiment, the rear mold core 11 is provided with an inlet gate and an outlet gate near the top of the front mold core 31, and a heating assembly is arranged on the top surface of the front mold core 31 away from the rear mold core 11, and the heating assembly The area at least covers the cavity of the product to be die-cast.

The heating component is used to reduce the temperature difference between the inlet gate and the outlet gate. Due to the small temperature difference, it can avoid product marks caused by the slow flow of raw materials at the outlet gate. At the same time, the heat energy generated by the heating component can reduce the wettability of the raw material and the contact surface of the mold, inhibit the heterogeneous nucleation during the filling process, reduce the viscosity, improve the fluidity, improve the filling ability, and make the raw material more closely bonded when solidified , improve the compactness and mechanical properties of the product, and avoid defects such as pores, shrinkage cavities, flow lines, and watermarks generated when raw materials flow.

In an optional embodiment, the heating assembly is a coil formed by winding a wire, the wire is connected to the top surface of the front mold core 31, and the two ends of the coil are respectively used as the positive pole and the negative pole for connecting to an external power supply. The coil is uniformly wound by wires to form a loop, and the material of the wires can be copper.

To sum up, the mold with the tunnel core-pulling slider in this embodiment includes the rear mold 1 and the core-pulling assembly 2, the rear mold core 11 is provided with a tunnel, and the core-pulling assembly 2 includes the core-pulling slider 21, the guide post 22 and the slide The block seat 23 and the guide post 22 are movably inserted on the slider seat 23 and the rear mold frame 12. At least one spray hole 13 is connected to the tunnel. After the mold is opened, the release agent is directly sprayed on the core-pulling slide On the block 21, lubricate and cool the core-pulling slider 21, so that the core-pulling slider 21 can be pulled out from the product to be die-casted in time, avoiding the sticking of the core-pulling slider 21 and causing sand holes in the product, effectively improving the product quality.

As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions described in each embodiment are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application.

Claims

A mold with a tunnel core-pulling slider, characterized in that it comprises a rear mold (1) and at least one core-pulling assembly (2), and the rear mold (1) includes a rear mold core (11) and a rear mold frame (12), the rear mold frame (12) is connected to the periphery of the rear mold core (11), and at least one tunnel is arranged in the rear mold core (11);

The core-pulling assembly (2) includes a core-pulling slider (21), a guide post (22) and a slider seat (23), and one end of the core-pulling slider (21) is arranged on the slider seat (23). ), the other end of the core-pulling slider (21) is movably arranged in the tunnel, and at least one spray hole (13) is communicated with the tunnel;

Both the slider seat (23) and the rear mold frame (12) are provided with through holes, and the guide posts (22) are movably inserted in the two through holes.
The mold with the tunnel core-pulling slider according to claim 1, characterized in that, one end of the slider seat (23) close to the core-pulling slider (21) is provided with a slot, and the core-pulling One end of the slider (21) is clamped in the slot.
The mold with the tunnel core-pulling slider according to claim 1, characterized in that, the inclination between the guide post (22) and the slider seat (23) is 30°-75°.
The mold with a tunnel core-pulling slider according to claim 1, characterized in that, the tunnel is provided with a plurality of spray holes (13), and the spray holes (13) are spaced at the same distance.
The mold with tunnel core-pulling slider according to claim 1, is characterized in that, also comprises front mold (3), and described front mold (3) comprises front mold kernel (31), and described front mold kernel ( 31) Matching with the rear mold core (11), the mold cavity of the product to be die-cast is formed between the front mold core (31) and the rear mold core (11) after mold closing.
The mold with the tunnel core-pulling slider according to claim 5, characterized in that, the core-pulling assembly (2) also includes an anti-feeding insert (24), and the anti-feeding insert (24) It is arranged on the front mold core (31), and the anti-feeding insert (24) is covered on the spray hole (13) after the mold is closed.
The mold with the tunnel core-pulling slider according to claim 5, characterized in that, the rear mold core (11) is provided with an inlet gate and an outlet gate near the top of the front mold core (31), A heating assembly is provided on the top surface of the front mold core (31) away from the rear mold core (11), and the area of the heating assembly at least covers the mold cavity of the product to be die-casted.
The mold with a tunnel core-pulling slider according to claim 7, wherein the heating assembly is a coil formed by winding a wire, and the wire is connected to the top of the front core (31) On the surface, the two ends of the coil are respectively used as the positive pole and the negative pole for connecting with the external power supply.