CN218015644U - Differential shell casting mold - Google Patents

Abstract

The utility model discloses a differential case casting mold, include: the sprue comprises a sprue, a cross sprue and a plurality of branch runners, wherein the sprue is provided with a transition runner; the horizontal pouring gate is arranged around the straight pouring gate and communicated with the transition pouring gate; a plurality of branch waters along the circumference interval arrangement of sprue, divides the one end and the cross gate intercommunication of watering, and the other end intercommunication has the die cavity. Through setting up the horizontal gate around the sprue, the horizontal gate is through dividing watering and die cavity intercommunication, can make the hot festival of the main part of whole gating system's difference shell of keeping away from, utilizes the nodular cast iron principle of solidifying simultaneously and graphite expansion when solidifying, can form comparatively fine and close base member tissue in the die cavity during the molten iron pouring, need not set up extra rising head and avoid the shrinkage cavity of difference shell, has reduced the processing cost of difference shell production, effectively improves the production efficiency of difference shell and the technology yield of difference shell.

Description

Differential shell casting mold

Technical Field

The utility model relates to the technical field of auto-parts, in particular to poor shell casting mold.

Background

One of the essential parts on the differential mechanism vehicle, its main effect makes the left and right (or preceding, back) drive wheel of car realize rotating with different rotational speeds, and differential mechanism's shell is the differential case promptly, and the differential case outside is the flange, is equipped with a plurality of strengthening ribs on the flange. In the traditional differential shell casting process, a built-in riser feeding scheme is mainly adopted, namely an inner riser is arranged in an inner cavity of the differential shell, so that the inner riser in the inner cavity of the differential shell needs to be removed after the differential shell is cast, the work of cleaning and polishing the riser is increased, the labor intensity of a differential shell production procedure is increased, and the production efficiency and the yield of the differential shell are reduced.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent. Therefore, the utility model provides a poor shell casting mold has cancelled the internal rising head, effectively improves the production efficiency of poor shell.

According to the utility model discloses differential shell casting mold, include: the sprue is provided with a transition sprue; the cross gate is arranged around the straight gate, and the cross gate is communicated with the transition gate; the branch pouring channels are arranged along the circumferential direction of the straight pouring channel at intervals, one end of each branch pouring channel is communicated with the transverse pouring channel, and the other end of each branch pouring channel is communicated with a cavity.

According to the utility model discloses poor shell casting mold has following beneficial effect at least: when pouring the poor shell, pour into the sprue with the molten iron, the molten iron passes through the transition runner in proper order, cross gate and branch runner, in getting into the die cavity of mould afterwards, because poor shell is provided with a plurality of strengthening ribs usually, poor shell is whole to be symmetrical hollow out construction, the heat festival homodisperse and the volume of poor shell are less promptly, solidify in the time of for the molten iron and provide advance condition, through setting up the cross gate around the sprue, cross gate is through dividing runner and die cavity intercommunication, can make the main part of whole gating system keep away from the heat festival of poor shell, utilize the nodular cast iron to solidify the principle simultaneously and graphite expansion when solidifying, can form comparatively fine and close matrix organization in the die cavity during the molten iron pouring, need not set up extra rising head and avoid poor shell shrinkage cavity, therefore, the poor shell pouring mould of this application can directly save the inside riser, the processing cost of poor shell production has been reduced, save the required cost of manual work and the time cost of user's clearance rising head, effectively improve the production efficiency of poor shell and the technology yield.

According to the utility model discloses a some embodiments, divide and water including a plurality of ingates that are parallel to each other, it is a plurality of the ingate is followed the length direction interval arrangement of cross gate, the one end of ingate with the cross gate intercommunication, the other end with the die cavity intercommunication.

According to some embodiments of the utility model, the transition is watered and is equipped with the runner and waters down, the runner with the interlude of watering down communicates, the both ends of watering down all with the cross gate communicates.

According to some embodiments of the utility model, go up water with the intercommunication department of watering down is equipped with the cassette.

According to some embodiments of the present invention, the length of the ingate is l, satisfying: l is more than or equal to 20mm and less than or equal to 40mm.

According to some embodiments of the invention, the end of the ingate communicates with the runner and is located below the runner.

According to some embodiments of the invention, the bottom of the sprue is provided with a buffer slot.

According to some embodiments of the invention, the buffer slot is spherical in shape.

According to some embodiments of the utility model, the die cavity intercommunication has the exhaust duct, the exhaust duct is located the center of die cavity.

Drawings

Fig. 1 is a schematic structural diagram of a differential shell casting mold according to an embodiment of the present invention;

fig. 2 is an elevation view of a differential shell casting mold according to an embodiment of the present invention;

fig. 3 is a bottom view of the differential shell casting mold according to an embodiment of the present invention.

Reference numerals: a sprue 100; a transition runner 110; an upper runner 111; a lower runner 112; a filter 120; a buffer tank 130; a runner 200; a branch pouring channel 300; an ingate 310; a mold cavity 400; the degassing channel 410.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If there is a description of first and second for the purpose of distinguishing technical features only, this is not to be understood as indicating or implying a relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of technical features indicated.

The embodiments of the present application will be further explained with reference to the drawings.

Referring to fig. 1 to 3, a differential plate casting mold according to an embodiment of the present invention includes a sprue 100, a runner 200, and a plurality of branch runners 300, wherein the sprue 100 is vertically arranged and provided with a transition runner 110; the horizontal pouring gate 200 is horizontally arranged and is vertical to the straight pouring gate 100, the horizontal pouring gate 200 is of an integrated semi-open structure, the horizontal pouring gate 200 is arranged around the straight pouring gate 100, and two ends of the horizontal pouring gate 200 are communicated with the transition pouring gate 110; a plurality of branch runners 300 are arranged at intervals in the circumferential direction of the sprue 100, and each branch runner 300 has one end communicating with the runner 200 and the other end communicating with the cavity 400 of the mold.

It can be understood that, when pouring the poor shell, pour the molten iron into the sprue 100, the molten iron passes through the transition runner 110 in proper order, the cross runner 200 and the branch runner 300, then enter into the die cavity 400 of the mould, because the poor shell is usually provided with a plurality of strengthening ribs, the poor shell is wholly in a symmetrical hollow structure, namely, the heat junctions of the poor shell are uniformly dispersed and have small volume, advance conditions are provided for the simultaneous solidification of the molten iron, through setting up the cross runner 200 around the sprue 100, the cross runner 200 is communicated with the die cavity 400 through the branch runner 300, the main body part of the whole pouring system can be separated from the heat junctions of the poor shell, graphite is expanded when utilizing the ductile iron simultaneous solidification principle and solidification, a compact base body structure can be formed in the die cavity 400 during the pouring of the molten iron, no extra riser is required to be arranged to avoid the poor shell shrinkage cavity, therefore, the poor shell pouring mould of the application can directly save the inner riser, the processing cost of the poor shell production is reduced, the labor intensity of the user is reduced, the labor cost and the time cost required for clearing the riser are saved, the experience degree of the user is effectively improved, and the production efficiency of the poor shell is improved.

Further, the cavity 400 of the mold is communicated with a vent hole 410, the vent hole 410 is arranged in parallel with the sprue 100, and the vent hole 410 is located in the center of the cavity 400. Before the molten iron is poured, the cavity 400 of the mold is provided with gas, and because the molten iron is solidified simultaneously, the exhaust duct 410 is vertically arranged at the center of the cavity 400, so that the gas in the cavity 400 can uniformly flow out, internal air holes of a poor shell finished product are reduced, and the pouring stability of the mold and the quality of the poor shell finished product are effectively improved.

Referring to fig. 1 and 3, it can be understood that the branch gate 300 includes a plurality of ingates 310 parallel to each other, the plurality of ingates 310 are arranged at intervals along the length direction of the runner 200 (since the runner 200 is arranged around the sprue 100, the length direction of the runner 200 herein refers to the length direction of the runner 200 to which each branch gate 300 is correspondingly connected), and one end of the ingate 310 is communicated with the runner 200 and the other end is communicated with the cavity 400. Through setting up a plurality of ingates 310, can follow a plurality of position to the molten iron of die cavity 400 pouring, avoid single ingate 310 flow not enough, lead to the molten iron in the die cavity 400 can not stably carry out the emergence of the scheduling problem that solidifies simultaneously, further improve the stability of mould pouring, improve the machining efficiency of poor shell.

It should be noted that the number of the ingates 310 is mainly determined by the size of the differential shell of the mold, the larger the size of the differential shell is, the larger the number of the ingates 310 is, and the smaller the size of the differential shell is, the smaller the number of the ingates 310 is, and the number of the ingates 310 is not particularly limited, as long as the processing efficiency of the differential shell can be improved.

Further, the end of the ingate 310 communicates with the runner 200 and is located below the runner 200. Set up like this, after the molten iron solidifies to accomplish, the molten iron of runner 200 department and the molten iron of ingate 310 department are not connected at the coplanar, but connect from top to bottom in vertical direction, and horizontally connect's molten iron is compared to the molten iron of connecting from top to bottom, and the structure of junction is more fragile, and breaking strength is littleer, and convenience of customers tailors unnecessary material, saves user's human cost, further improves the machining efficiency of poor shell.

Referring to fig. 2, it can be understood that the transition gate 110 is provided with an upper gate 111 and a lower gate 112, the upper gate 111 is located in the middle of the opening of the semi-open cross gate 200, the upper gate 111 is communicated with the middle section of the lower gate 112, and both ends of the lower gate 112 are respectively communicated with both ends of the semi-open cross gate 200. Through setting up runner 111 and runner 112, on the one hand, runner 111, runner 112 and the cross gate 200 cooperation around runner 100, surround runner 100 completely, make runner 100 of the key of the gating system totally far away from the hot spot department of poor shell, alleviate the influence of gating system to the molten iron solidification reaction, further improve the stability of molten iron solidification reaction simultaneously, on the other hand, runner 111 and runner 112 of upper and lower intercommunication, both can guide the molten iron and flow into cross gate 200 evenly steadily, indirectly improve the finished product quality of poor shell, can convenience of customers tailors unnecessary material again, further improve the machining efficiency of poor shell.

Furthermore, a filter sheet 120 is provided at the connection part between the upper pouring channel 111 and the lower pouring channel 112, the longitudinal direction of the filter sheet 120 is arranged in parallel with the longitudinal direction of the upper pouring channel 111, and the area of the filter sheet 120 is equal to or larger than the area of the upper pouring channel 111. Through setting up the cassette 120, the impurity in the molten iron can be filtered to the cassette 120, makes the active ingredient in the molten iron more even unanimous, effectively improves poor shell off-the-shelf uniformity, has further improved the technology yield of poor shell.

Referring to fig. 3, it can be appreciated that the length l of the ingate 310 satisfies: l is more than or equal to 20mm and less than or equal to 40mm. If the length of ingate 310 is too short, can not satisfy the requirement that the gating system keeps away from the poor shell thermal center, can make the temperature difference appear in the temperature field in the die cavity 400, the size that solidifies when influencing the molten iron and the inflation size of reaction and ductile iron, and then reduce the off-the-shelf yields of poor shell, if the length overlength of ingate 310, the molten iron loss appears easily, solidify the scheduling problem in advance, and then reduce the machining efficiency of poor shell, inject the length of ingate 310 in 20mm to 40mm, the poor shell thermal center that the gating system kept away from both can make, provide stable effectual reaction environment for the molten iron, can reduce the molten iron loss again, further improve the off-the-shelf quality of poor shell and the machining efficiency of poor shell.

Further, a buffer groove 130 is provided at the bottom end of the sprue 100. Because the molten iron has strong impact on the bottom of the sprue 100, when the molten iron reaches the bottom of the sprue 100, a vortex and a turbulent flow area are generated, casting defects such as sand washing, slag holes, a large amount of oxide inclusions and the like are easily caused, the flow condition of the molten iron can be improved by arranging the buffer groove 130, the turbulent flow area at the communication position of the sprue 100 to the transition runner 110 is shortened, the local resistance coefficient and the head loss at the communication position of the sprue 100 to the transition runner 110 are reduced, the flow distribution of the molten iron in the subsequent runners is improved, the initially entering molten iron is stored, the buffer effect is realized on the later molten iron, the molten iron is properly guided to flow upwards, impurities and bubbles are favorably floated to the upper runner 111, and therefore, the impurities and gas in the molten iron are filtered by matching with the filter plate 120 and the exhaust duct 410, and the quality of a differential shell finished product is effectively improved.

Further, the buffer tank 130 has a spherical shape. Set up the dashpot 130 into spherical, compare the dashpot 130 of other shapes, more molten iron can be cushioned to spherical dashpot 130 to further strengthen the buffering effect of dashpot 130, simultaneously, the shape that the molten iron solidifies in spherical dashpot 130 is pleasing to the eye naturally, when the follow-up unnecessary material of clearance of user, feels comfortable, improves user's use experience.

While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention defined by the appended claims.

Claims (9)

1. The utility model provides a differential shell casting mold which characterized in that includes:

the straight pouring gate is provided with a transition pouring gate;

a runner disposed around the sprue, the runner in communication with the transition runner;

the branch runners are arranged along the periphery of the sprue at intervals, one end of the branch runner is communicated with the cross runner, and the other end of the branch runner is communicated with a cavity.

2. The differential shell casting mold according to claim 1, wherein the branch pouring channel comprises a plurality of inner pouring channels which are parallel to each other, the plurality of inner pouring channels are arranged at intervals along the length direction of the cross pouring channel, one end of each inner pouring channel is communicated with the cross pouring channel, and the other end of each inner pouring channel is communicated with the cavity.

3. The differential casing casting mold according to claim 1, wherein the transition pouring gate is provided with an upper pouring gate and a lower pouring gate, the upper pouring gate is communicated with the middle section of the lower pouring gate, and both ends of the lower pouring gate are communicated with the cross gate.

4. The differential shell casting mold of claim 3, wherein a filter is arranged at the communication position of the upper pouring channel and the lower pouring channel.

5. The differential shell casting mold of claim 2, wherein the length of the ingate is l, satisfying: l is more than or equal to 20mm and less than or equal to 40mm.

6. The differential shell casting mold of claim 2, wherein the ends of the ingate communicate with and are located below the runner.

7. The differential shell casting mold of claim 1, wherein the bottom end of the sprue is provided with a buffer groove.

8. The differential case casting mold of claim 7, wherein the buffer groove is spherical in shape.

9. The differential shell casting mold according to claim 1, wherein the cavity is communicated with a vent hole channel, and the vent hole channel is positioned in the center of the cavity.

Images