CN204308162U - A kind of casing forming mold - Google Patents

Abstract

The utility model provides a shell forming mold, which comprises a mold box, a mold base, a molding core and a sprue sleeve; the mold box includes a movable mold box and a fixed mold box, and the mold base includes a movable mold base and a fixed mold box. mold base, the movable mold base is arranged in the movable mold box, the fixed mold base is arranged in the fixed mold box; the mold base is accommodated in the mold box, and the molding core is accommodated in In the mold base, there is a molding cavity of the workpiece between the molding core and the mold base, the mold opening direction of the molding core is set along the horizontal direction, and the sprue sleeve is arranged along the molding die The mold opening direction of the core is set in the mold box, and the sprue bushing is provided with a sprue along the mold opening direction of the forming mold core, and the mold base is provided with a gate connecting the sprue and the mold base. The runner of the molding cavity, the runner guides the workpiece glue from the sprue to flow into the molding cavity, the guide direction of the runner to the workpiece glue is perpendicular to the mold opening direction of the molding core, the The runner is arranged below the molding space.

Description

A shell forming mold

technical field

The utility model relates to the technical field of workpiece forming, in particular to a shell forming die.

Background technique

The mold used for the shape casting mold mainly includes an upper mold box, a lower mold box, an inner forming mold, a core forming mold and a sprue sleeve. There is a molding cavity between the inner forming mold and the core forming mold, and the sprue sleeve It is provided in the mold box to communicate with the molding cavity, and the workpiece glue is input into the molding cavity for casting and molding. In the prior art, the direction in which the workpiece glue enters the molding cavity is usually the mold opening direction of the workpiece. However, in such a design, the workpiece glue enters the molding cavity and flows along the periphery of the core forming mold, which is not only prone to uneven distribution of the workpiece glue, but also cannot fully remove the air in the molding cavity, and the air mixed into the glue will cause Air bubbles will cause defects such as cold lines, cold shuts and sand holes in the workpiece, resulting in substandard products.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides a shell forming mold, which changes the direction of the workpiece glue entering the forming cavity to be perpendicular to the mold opening direction of the workpiece, and the workpiece glue enters the entrance of the forming cavity It is located below the molding cavity, so that after the glue enters the molding cavity, the liquid level rises gradually, thereby avoiding the uneven distribution of the glue in the molding space, and can fully remove the air in the molding cavity, so that the workpiece The surface is smooth, avoiding defects such as cold lines, cold shuts and sand holes, and the product qualification rate is high.

The technical scheme of the utility model is as follows: a mold for forming a shell, including a mold box, a mold base, a molding core and a sprue sleeve; the mold box includes a movable mold box and a fixed mold box, and the mold base includes a movable mold box seat and fixed mold seat, the movable mold seat is arranged in the movable mold box, the fixed mold seat is arranged in the fixed mold box; the mold seat is accommodated in the mold box, and the molding core It is accommodated in the mold base, and there is a molding cavity of the workpiece between the molding core and the mold base, the mold opening direction of the molding core is set along the horizontal direction, and the sprue sleeve is set along the The mold opening direction of the forming mold core is set in the mold box, and the sprue sleeve is provided with a sprue along the mold opening direction of the forming mold core. The sprue and the flow path of the molding cavity, the flow path guides the workpiece glue from the sprue to flow into the molding cavity, and the guide direction of the flow path to the workpiece glue is perpendicular to the molding core In the mold opening direction, the flow channel is arranged below the molding space.

The flow channel is arranged in a "Y" shape, and the two branches of the "Y" shape are the branch channels of the flow channel.

One end of the molding core is accommodated in the fixed mold base, and the flow channel is arranged on the fixed mold base.

The fixed die base is recessed on the side adjacent to the molding cavity to form an overflow port, and the overflow port is recessed outwards and downwards on the fixed die base to form an overflow groove, and the lower die base is also provided with an exhaust One end of the exhaust groove is connected to the atmosphere, and the other end is connected to the overflow groove.

The overflow port, the overflow groove and the exhaust groove are all arranged on the upper part of the fixed mold base.

The shell forming mold also has a splitter cone inserted into the sprue.

A split inflow channel is formed between the splitter cone and the side wall of the sprue, and the split inflow channel communicates with the runner and the sprue.

Preferably, the length of the split inflow runner along the mold opening direction of the molding core is greater than or equal to millimeters and less than or equal to millimeters, and the outer end surface of the inlet end of the sprue to the end surface of the splitter cone is along the length of the molding die. The length of the core in the mold opening direction is greater than or equal to 120 mm and less than or equal to 360 mm.

The movable mold base and the fixed mold base are respectively provided with mutually matching protrusions and grooves.

The beneficial effects of the utility model are as follows: in the shell forming mold, the direction in which the workpiece glue enters the forming cavity is changed to be perpendicular to the mold opening direction of the workpiece, and the entrance of the workpiece glue entering the forming cavity is located in the forming cavity. The bottom of the cavity, so that after the glue enters the molding cavity, the liquid level rises gradually, thereby avoiding the uneven distribution of the glue in the molding space, and can fully remove the air in the molding cavity, making the surface of the workpiece smooth and avoiding There are no defects such as cold lines, cold shuts and sand holes, and the product qualification rate is high.

Description of drawings:

Fig. 1 is a structural schematic diagram of the shell molding die described in the present invention.

Fig. 2 is a schematic diagram of an exploded structure of the shell molding die described in the present invention.

Fig. 3 is a schematic diagram of another exploded structure of the shell molding die described in the present invention.

Fig. 4 is a right side view of the housing molding die described in the present invention.

FIG. 5 is a cross-sectional view along the A-A plane of FIG. 4 , in which there is a molded workpiece 70 between the mold base 20 and the molding core 30 .

FIG. 6 is a cross-sectional view along the A-A plane of FIG. 4 , in which there is a molding cavity 60 between the mold base 20 and the molding core 30 .

Detailed ways

The utility model will be further described below in conjunction with the accompanying drawings and preferred embodiments, but the implementation of the utility model is not limited thereto.

Referring to FIGS. 1 to 6 , a shell forming mold includes a mold box 10 , a mold base 20 , a molding core 30 , a splitter cone 40 and a sprue bushing 50 . The mold box 10 includes a movable mold box 11 and a fixed mold box 12 . The mold base 20 includes a movable mold base 21 and a fixed mold base 22 . The movable mold holder 21 is arranged on the movable mold box 11 , and the fixed mold holder 22 is arranged on the fixed mold box 12 . The mold base 20 is accommodated in the mold box 10 , and the molding core 30 is accommodated in the mold base 20 . The mold opening direction of the molding core 30 is set along the horizontal direction, that is, the direction indicated by arrow B in FIG. 5 and FIG. 6 . The sprue bushing 50 is disposed on the mold box 10 along the mold opening direction of the forming mold core 30 , and a sprue 51 is arranged along the mold opening direction of the forming mold core 30 . There is a molding cavity 60 between the mold base 20 and the molding core 30 , and the mold base 20 is provided with a flow channel 23 that communicates with the molding cavity 60 and the sprue 51 and allows the liquid metal to enter the molding space 60 , the flow channel 23 is arranged below the molding cavity 60, and the guide direction of the flow channel 23 to the workpiece glue is perpendicular to the mold opening direction of the molding core 30, that is, in Fig. 5 and Fig. 6 direction indicated by arrow C. In the technical solution of the utility model, the workpiece glue enters from the lower part of the forming space 60 (that is, the direction of the lower part of Fig. 5 and Fig. 6). 60 gradually rises until all of the molding space 60 is filled, so that the air in the molding space 60 can be gradually eliminated, and there will be no uneven thickness of the glue in the molding space 60, thereby avoiding the formation of cold lines on the surface of the workpiece 70, Cold shut or sand holes. However, in the prior art scheme, the guide direction of the runner 23 to the workpiece glue is parallel to the setting of the mold opening direction of the molding core 30. After the workpiece glue enters the molding space 60, it flows from the runner 23 Fill the forming space 60 along the forming core 30 on both sides of the two sides respectively. Due to the irregular flow of the glue along the forming core 30, the thickness of the glue in the forming space 60 will be uneven, and the air cannot be removed in time. , resulting in the generation of air bubbles, thereby forming cold lines, cold shuts or sand holes on the surface of the workpiece 70 .

Preferably, referring to FIG. 2 , the flow channel 23 is arranged in a "Y" shape, and the two branches 24 of the "Y" shape are flow channel 23 branch channels. The "Y"-shaped flow channel 23 can make the workpiece glue flow into the molding space 60 symmetrically and evenly from the lower part of the molding space 60. sand hole. Specifically, in this embodiment, the Y"-shaped runner 23 is arranged below the lower mold base 22, so that the metal liquid enters the molding cavity 60 and then directly flows into the lower part of the molding cavity 60. , to avoid the generation of air bubbles, thereby forming cold lines, cold shuts or sand holes on the surface of the workpiece 70 .

Preferably, referring to FIG. 5 and FIG. 6 , one end of the molding core 30 is accommodated in the lower mold base 22 , and the runner 23 is provided on the lower mold base 22 .

Preferably, the side of the movable mold base 21 close to the molding cavity 60 is recessed to form an overflow port 25, and the overflow port 25 is recessed outward and downward on the movable mold base 21 to form an overflow groove 26, so The movable mold base 21 is also provided with an exhaust groove 27, one end of which is connected to the atmosphere, and the other end is connected to the overflow groove 26, so that the gas can be discharged smoothly. Preferably, in order to facilitate the exhaust, the flow channel 23 is arranged under the movable mold base 21, and the overflow port 25, the overflow groove 26 and the exhaust groove 27 are all arranged on the Above the movable mold base 21, so as to facilitate the full removal of gas. Specifically, in this embodiment, five overflow ports 25 are evenly distributed on the upper part of the movable mold base 21, and each overflow port 25 is connected to an overflow groove 26 and an exhaust groove 27, so that The exhaust structure of the forming cavity 60 is more reasonable and compact. But the utility model does not limit to the overflow port 25, the quantity of the overflow groove 26 and the exhaust groove 27, and it can be selected flexibly according to actual needs.

The splitter cone 40 is inserted in the sprue 51 to form a split inflow runner 52 with the side wall of the sprue 51 . The branching runner 52 communicates with the runner 23 and the sprue 51 . After the workpiece glue enters the sprue 51 , it enters the molding cavity 60 through the diverting sprue 52 and the runner 23 .

Preferably, the length of the split inflow runner 52 along the mold opening direction of the molding core 30 is greater than or equal to 30 millimeters and less than or equal to 90 millimeters, and the outer end surface 53 of the inlet end of the runner 51 reaches the splitter cone 40 The length of the end surface 41 along the mold opening direction of the molding core 30 is greater than or equal to 120 mm and less than or equal to 360 mm. Thereby, in the process of injecting the metal liquid into the molding cavity 60, the impact of the metal liquid on the sprue 51 and the diversion runner 52 is sufficient to buffer the metal liquid, so that the metal liquid has an impact on the sprue 51, the diversion runner 52 and the runner 52. The impact force of the runner 23 is greatly reduced, thereby reducing the damage of the metal liquid to the sprue bushing 50, the splitter cone 40, the mold base 20 and the forming mold core 30, so that the service life of the shell forming mold of the present invention is greatly improved. It is extended, and there is no need to frequently replace the shell molding die of the utility model, which finally greatly reduces the investment cost of die-casting production, and also has the advantages of simple and compact structure.

The movable mold base 21 and the fixed mold base 22 are respectively provided with mutually matched protrusions 28 and grooves 29 .

The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and it cannot be assumed that the specific implementation of the utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the utility model belongs, on the premise of not departing from the idea of the utility model, its structure form can be flexible and changeable, and a series of products can be derived. Just making some simple deductions or substitutions should be considered as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims (9)

1. a casing forming mold, comprises moulding box, die holder, formation die core and sprue bush, described moulding box comprises dynamic model case and cover half case, and described die holder comprises dynamic model seat and cover half seat, and described dynamic model seat is located at described dynamic model case, and described cover half seat is located at described cover half case, described die holder is placed in described moulding box, described formation die core is placed in described die holder, and there is between described formation die core and described die holder the molding cavity of workpiece, the die sinking direction of described formation die core is arranged in the horizontal direction, described sprue bush is arranged at described moulding box along the die sinking direction of described formation die core, and described sprue bush is provided with note running channel along the die sinking direction of described formation die core, it is characterized in that, described die holder is provided with the runner being communicated with described note running channel and described molding cavity, described runner guides workpiece glue to flow into described molding cavity from note running channel, the die sinking direction of the vertical described formation die core of the channeling direction of described runner to workpiece glue, described runner is located at the below of described molding space.

2. casing forming mold as claimed in claim 1, is characterized in that, described runner is arranged in " Y " shape, and two of " Y " shape branch into the runner of runner.

3. casing forming mold as claimed in claim 1 or 2, it is characterized in that, one end of described formation die core is placed in described cover half seat, and described runner is located on described cover half seat.

4. casing forming mold as claimed in claim 1 or 2, it is characterized in that, described cover half seat is recessed to form overfall on the side of contiguous described molding cavity, this overfall is outwards recessed to form overflow launder downwards on cover half seat, described die shoe is also provided with air discharge duct, described air discharge duct one end is communicated with air, and the other end is communicated with described overflow launder.

5. casing forming mold as claimed in claim 4, it is characterized in that, described overfall, described overflow launder and described air discharge duct are all located at the top of described cover half seat.

6. casing forming mold as claimed in claim 1, it is characterized in that, described casing forming mold also has spreader, and described spreader is inserted in this note running channel.

7. casing forming mold as claimed in claim 6, is characterized in that, is formed to divide to flow into running channel between the sidewall of described spreader and described note running channel, and described point flows into running channel and be communicated with described runner and described note running channel.

8. casing forming mold as claimed in claim 7, it is characterized in that, described point flows into running channel and is more than or equal to millimeter along the length in the die sinking direction of described formation die core and is less than or equal to millimeter, and the outer face of the arrival end of described note running channel is more than or equal to 120 millimeters to the end face of spreader along the length in described formation die core die sinking direction and is less than or equal to 360 millimeters.

9. casing forming mold as claimed in claim 1, is characterized in that, described dynamic model seat and described cover half seat are respectively equipped with the projection and groove that mutually mate.