CN205673557U - Die-casting mold for a lampshade - Google Patents

Abstract

The utility model discloses a die casting die of a lampshade, which comprises a fixed die frame, a fixed die core, a movable die frame, a movable die core, a top plate and a top rod, wherein a die cavity formed by die casting is formed after the lower surface of the fixed die core is tightly attached to the upper surface of the movable die core, the center of the fixed die core is provided with a circular through hole for the inlet of liquid metal material during die casting, the movable die core is provided with a movable die side runner groove for the passage of casting material into the die cavity by die casting, the movable die side runner groove is divided into two parts and is respectively connected with the die cavities on the front side and the rear side, the fixed die core is also provided with two supplementary runners, one end of the supplementary runner is connected with the movable die side runner groove, the other end is connected with the die cavities on the front end and the rear end of a product, the movable die core is also provided with two overflow chutes on the outer, the ejector rod can eject the product out of the cavity through the top plate.

Description

Die-casting mold for a lampshade

technical field

The utility model relates to a die-casting mold, in particular to a die-casting mold for a lampshade.

Background technique

Die-casting mold is a method of casting liquid die forging, which is a process completed on a special die-casting die forging machine. Its basic technological process is: the metal liquid is firstly cast and filled into the cavity of the mold at low or high speed. Loose defects also make the internal structure of the blank reach the broken grains of the forged state. The comprehensive mechanical properties of the blank are significantly improved. In the die-casting of products, especially in the molding process of lampshades and other shell products, air bubbles or flow marks are often easy to appear on the surface after molding, which seriously affects the appearance of the product, which is necessary for this problem. A die-casting mold for a lampshade is developed to solve the above-mentioned problems in the die-casting process.

Utility model content

The technical problem to be solved by the utility model is to provide a die-casting mold for a lampshade to solve the problem that flow marks appear on the surface of the product after die-casting and seriously affect the appearance of the product.

In order to solve the above-mentioned technical problems, the technical solution of the utility model is: a die-casting mold for a lampshade, including a fixed mold frame, a fixed mold core, a movable mold frame, a movable mold core, a top plate and a push rod, and the fixed mold core is located at the fixed mold core. The inside of the mold frame is connected with the thread, the movable mold core is located inside the movable mold frame and connected with the thread, the fixed mold frame and the movable mold frame are aligned up and down, the fixed mold core and the movable mold core are aligned up and down, and the fixed mold The lower surface of the inner core and the upper surface of the movable mold core are closely fitted to form a die-casting cavity. The center of the fixed mold core has a circular through hole for the inlet of the liquid metal material during die-casting. The movable mold core has a The runner groove on the side of the movable mold is used for the passage of the casting material to enter the mold cavity. The cross section of the runner groove on the side of the movable mold is a trapezoidal shape with rounded corners. The runner groove on the side of the movable mold is divided into two and connected respectively. The cavity on the front and rear sides, the fixed mold core is also provided with two supplementary runners, one end of the supplementary runner is connected to the runner groove on the side of the movable mold, and the other end is connected to the cavities at the front and rear ends of the product. The mold core is also provided with two overflow grooves on the outside of the cavity, which are respectively located at the front and rear ends of the runner groove on the side of the movable mold opposite to the cavity. The overflow grooves are connected with the cavity. The design of the groove can avoid the problem of foaming of the lampshade product in the subsequent heating process. The outer end of the overflow groove is also provided with an exhaust groove for discharging the gas in the cavity during the die-casting filling process. The top plate is located at The lower end of the movable mold frame, the ejector rod is located on the top of the top plate and connected with it by threads, the ejector rod can eject the product from the cavity through the top plate, the ejector rod penetrates the movable mold core and the movable mold frame, and the upper end of the ejector rod is connected to the mold cavity. The cavity is connected, and the ejector pin can also be used for exhausting during the die-casting process.

Compared with the prior art, a die-casting mold for a lampshade is provided with runners or overflow grooves around the cavity, which can effectively avoid the problem of foaming of the lampshade product in the subsequent heating process and ensure that the die-casting mold It can reasonably adjust the filling time of the die-casting material to ensure that there will be no flow marks due to too fast filling, and at the same time, it can also ensure that there will be no defects such as weld seams due to rapid cooling during the filling process. In addition, the setting of overflow grooves and exhaust grooves ensures When filling, all the gas in the cavity can be discharged to avoid air bubbles in the product. In addition, the ejector pin not only has the function of ejection, but also facilitates the smooth exhaust of the cavity when it exits the ejector pin. Such a flow channel and exhaust design ensure When the product is die-casted, it can effectively avoid the generation of flow marks and air bubbles, which is conducive to ensuring the appearance quality of the product.

Description of drawings

Fig. 1 shows the front view of the utility model

Fig. 2 shows the utility model top view

Fixed mold frame 1, fixed mold core 2, movable mold frame 3, movable mold core 4, top plate 5, ejector pin 6, cavity 21, circular through hole 22, supplementary runner 23, movable mold side runner groove 41, Overflow groove 42, exhaust groove 43

detailed description

As shown in Figures 1 and 2, a die-casting mold for a lampshade includes a fixed mold frame 1, a fixed mold core 2, a movable mold frame 3, a movable mold core 4, a top plate 5 and a push rod 6, and the fixed mold core 2 Located inside the fixed mold frame 1 and connected to it by threads, the movable mold core 4 is located inside the movable mold frame 3 and connected to it by threads, the fixed mold frame 1 and the movable mold frame 3 are aligned up and down, and the fixed mold core 2 and the movable mold core are aligned up and down. The mold core 4 is aligned up and down, and the lower surface of the fixed mold core 2 and the upper surface of the movable mold core 4 are closely attached to form a die-casting cavity 21. The center of the fixed mold core 2 has a circular through hole 22 for The inlet of the liquid metal material during die-casting. The movable mold core 4 has a movable mold side runner groove 41 for the passage of the casting material into the cavity 21. The cross section of the movable mold side runner groove 41 is a circle trapezoidal corner, the movable mold side runner groove 41 is divided into two and respectively connected to the cavity 21 on the front and rear sides, the fixed mold core 2 is also provided with two supplementary runners 23, the supplementary runners 23 One end is connected to the runner groove 41 on the side of the movable mold, and the other end is connected to the cavity 21 at the front and rear ends. The movable mold core 4 is also provided with two overflow grooves 42 on the outside of the cavity 21 respectively located in the runner groove on the side of the movable mold. 41 is opposite to the front and rear ends of the cavity 21, the overflow groove 42 is connected to the cavity 21, and the outer end of the overflow groove 42 is also provided with an exhaust groove 43 for filling the cavity 21 during the die-casting mold filling process. The gas inside is exhausted, the top plate 5 is located at the lower end of the movable mold frame 3, the ejector pin 6 is located at the upper end of the top plate 5 and is threadedly connected with it, the ejector pin 6 can push the product out of the cavity through the top plate 5, the The ejector pin 6 runs through the movable mold core 4 and the movable mold frame 3, and the upper end of the ejector pin 6 is connected with the cavity 21, and the ejector pin 6 can also be used for exhausting during the die-casting process. During the die-casting molding process, the fixed mold core and the movable mold core are attached to each other, and the die-casting material enters the side runner of the movable mold through the sprue sleeve placed in the circular through hole located in the center of the fixed mold core, and then enters the cavity for filling. The air inside is discharged through the gap between the fixed mold and the movable mold, the overflow groove and the gap between the ejector pin and the movable mold core. The die-casting mold structure of this structure can effectively adjust the filling speed of the die-casting material and avoid the appearance of flow marks on the surface of the product through the runner grooves and supplementary runners set on the movable mold core and the fixed mold core. , the setting of the overflow groove makes the air in the cavity more fully discharged during the filling process, effectively avoiding the generation of air bubbles during the molding process, and the design of the flow channel and overflow groove can effectively avoid the post-processing of the lampshade product Problems with foaming when heated.

The utility model is not limited to the above-mentioned specific implementation manners, and various transformations made by those skilled in the art starting from the above-mentioned ideas without creative work all fall within the protection scope of the utility model.

Claims (3)

1. a die-casting mold of lampshade, it is characterized in that, comprises fixed mold frame, fixed mold kernel, movable mold frame, movable mold kernel, top plate and ejector pin, described fixed mold kernel is positioned at fixed mold frame inside and is connected with its screw thread, The movable die core is located inside the movable die frame and connected to it by threads, the fixed die frame and the movable die frame are aligned up and down, the fixed die core and the movable die core are aligned up and down, and the lower surface of the fixed die core is aligned with the upper surface of the movable die core. The die-casting mold cavity is formed after the surfaces are closely fitted. The center of the fixed mold core has a circular through hole for the inlet of liquid metal material during die-casting. The movable mold core has a movable mold side runner groove for The channel through which the casting material enters the mold cavity through die-casting. The cross section of the runner groove on the side of the movable mold is trapezoidal with rounded corners. The fixed mold core is also provided with two supplementary runners. One end of the supplementary runner is connected to the runner groove on the side of the movable mold, and the other end is connected to the cavity at the front and rear ends of the product. There are two overflow grooves located at the front and rear ends of the movable mold side runner groove opposite to the cavity, the overflow grooves are connected to the cavity, the top plate is located at the lower end of the movable mold frame, and the ejector pin is located on the top plate The upper end is connected with threads, and the push rod can push the product out of the cavity through the top plate. 2 . The die-casting mold for a lampshade according to claim 1 , wherein an exhaust groove is provided at the outer end of the overflow groove to discharge the gas in the cavity during the die-casting mold filling process. 3 . 3. A die-casting mold for a lampshade according to claim 2, wherein the ejector pin runs through the movable mold core and the movable mold frame, and the upper end of the ejector pin is connected to the cavity, and the ejector pin can also be used in the die-casting process exhaust.