CN110814299A - A casting and pouring system for clutch gray iron pressure plate - Google Patents

Abstract

The present invention protects a casting and gating system for a clutch gray iron pressure plate, which includes at least one gating system unit, the gating system unit includes at least one pressure plate casting, the pressure plate casting is connected to a continuous blanking runner, the The continuous blanking runner includes a vertical runner, a slag collecting runner and an intermediate runner which are connected to each other in turn; the pressure disc casting is overlapped with the intermediate runner to form a first water inlet, and the intermediate runner and the slag collecting runner are overlapped. Connected to form a second water inlet; under the condition that a certain structural ratio is satisfied between the continuous blank holder and the casting, a casting mold without a riser is formed. Compared with the prior art, the gating system innovatively adopts the present invention The feeding method without riser is adopted, which fully meets the feeding requirements of castings and reduces the consumption of molten iron, which provides inspiration for modern industrial green production.

Description

A casting and pouring system for clutch gray iron pressure plate

technical field

The invention relates to the field of foundry industry, in particular to a casting and pouring system for a clutch grey iron pressure plate.

Background technique

The casting process is the process of pouring molten metal into a mold, and cooling and solidifying to obtain parts with the desired shape and properties. Casting technology is one of the main methods to obtain mechanical product blanks. It is an important basic process in the foundry machinery industry. It occupies an important position in the national economy and is currently widely used in the casting of clutch pressure plates.

Most of the existing clutch pressure plate molds are symmetrically distributed on the left and right, and the vertical sprue passes through the middle of the left and right castings. However, in the long-term actual production, it is found that the existing casting process has the following defects: 1. The process design is cumbersome, and there are many factors affecting the calculation of the thermal section. 2. If the diameter or position of the riser is not set properly, shrinkage cavities will appear in the lower part of the riser; 4. There are multiple water inlets in the existing gating system, resulting in unstable molten iron filling, slag inclusions, sand holes, etc. The probability of defects is increased, and a lot of molten iron is wasted by setting too many runners.

In order to solve the above-mentioned problems, and in combination with the strong self-feeding effect of gray iron during solidification, the present invention proposes a method of modifying the feeding method of the top riser in the original process to a feeding method without a riser. While reducing the shrinkage effect, it simplifies the subsequent cleaning process of the casting, reduces the labor intensity, and improves the quality and efficiency of the casting process.

SUMMARY OF THE INVENTION

The technical problem solved by the present invention is to provide a casting and pouring system for the clutch gray iron pressure plate.

The technical means adopted in the present invention are as follows.

A casting and gating system for a clutch gray iron pressure plate, comprising at least one gating system unit, the gating system unit including at least one pressure plate casting, the pressure plate casting being connected to a continuous blanking runner, the continuous pressing The side runner consists of a vertical runner, a slag collecting runner and an intermediate runner which are connected to each other in turn; wherein the pressure plate casting and the intermediate runner are overlapped to form the first water inlet respectively, and the overlap width is 2.5-3.5mm; the intermediate runner It is overlapped with the slag collecting runner to form a second water inlet, and the overlap width is 3.5-5mm; the overlap length of the two places is the same.

The thickness of the slag collecting runner is H2, and the half of the maximum width is L2; the thickness of the intermediate runner is H1, and the maximum width is L1; the height of the pressure plate casting body is H, and the maximum width is L. The above parameters The following conditions are met:

H1=(1.5-2)H; L1=(1.1-1.3)L;

H2=(1.2-1.5)H1; L2=(1.2-1.4)L1.

Further, a casting and pouring system for a clutch gray iron pressure plate also includes two pressure plate castings arranged symmetrically on the left and right sides, a slag collecting runner is connected below the vertical runner, and the slag collecting runner is respectively connected with an intermediate pouring channel. Each intermediate runner connects to a pressure plate casting.

Further, the vertical runner adopts a standard trapezoidal runner, and the cross-sectional area is at least 300 mm ² ; the height of the vertical runner is at least 60 mm higher than the top of the pressure plate casting.

Further, the transverse cross-sectional shape of the slag collecting runner is a trapezoid.

Further, at least one interconnected sheet runner is arranged between the runners in the casting system.

The advantageous effects produced by the present invention are as follows.

The invention innovatively proposes a casting and pouring system for the clutch gray iron pressure plate. By virtue of the strong self-feeding effect of the gray iron during solidification, the feeding method of the top riser in the original process is modified to the one without riser. The shrinkage method, the cancellation of the top riser improves the yield of the platen process, perfectly solves the shrinkage defect of the riser position, and saves a lot of molten iron; secondly, the no-riser process can make the platen fill smoothly during the pouring process. , effectively reducing defects such as poor friction surface processing and blisters; at the same time, the pouring system without risers further simplifies the original pouring, saving time and effort in the later processing process. After a large number of production verifications, the new process can not only stabilize production but also greatly improve production efficiency, which is worthy of promotion.

Description of drawings

FIG. 1 is a schematic structural diagram of a casting and pouring system for a clutch gray iron pressure plate of the present invention.

FIG. 2 is a schematic diagram of a partial cutaway structure of a casting and gating system for a clutch gray iron pressure plate of the present invention.

FIG. 3 is a partial cross-sectional schematic view of the casting and gating system of a clutch gray iron pressure plate of FIG. 2 according to the present invention.

Figure 4 is changed to a schematic diagram of the lap length of the water inlet A, the lap length of the water inlet B, and the height difference between the vertical runner and the pressure plate.

FIG. 5 is a schematic diagram of the positions of the first water inlet and the second water inlet in the present invention.

Detailed ways

Below in conjunction with the accompanying drawings, the specific implementation, structure, features and effects of a casting and pouring system for a clutch gray iron pressure plate according to the present invention will be described in detail as follows.

As shown in FIG. 1 , a schematic structural diagram of the casting and gating system of a clutch gray iron pressure plate of the present invention, in the casting mold structure of the present invention, the feeding method of the top riser in the original process is modified to the feeding without a riser way, the casting and gating system mainly includes at least one gating system unit, the gating system unit includes at least one pressure plate casting 6, the pressure plate casting 6 is connected to a continuous blank runner, the continuous blank casting The runner is connected with the runners 1 and 2 and the thin runner 5 to form a casting mold without risers as a whole. The gating system can set up multiple gating system units according to actual production needs or cast other similar castings according to this method without risers. Compared with the prior art, the present invention innovatively adopts the feeding mode without riser, which fully meets the feeding requirements of castings and reduces the usage of molten iron, which provides inspiration for modern industrial green production.

From the above, the feeding method without the riser of the present invention is completed by the continuous blank holder runner, please refer to FIG. 2, FIG. 3 and FIG. 5 at the same time. vertical runner 3, slag collecting runner 4 and intermediate runner 7. In a preferred embodiment, the pressure plate casting 6 is overlapped with the intermediate runner 7 to form the first water inlet A, and the overlap width is 2.5-3.5mm; the intermediate runner 7 is overlapped with the slag collecting runner 4 The second water inlet B is formed, and the overlapping width is 3.5-5mm. The overlapping lengths of the first water inlet A and the second water inlet B are the same, and the specific length should be adjusted according to the filling time of the product; The first water inlet A and the second water inlet B can allow molten iron to pass through. Since both are flow runners with small slits, the sand holes and quality caused by the inflow of impurities in the molten iron into the casting cavity can be avoided again. inequality.

In order to meet the feeding requirements under the feeding mode without risers, the continuous blanking runners of the present invention are set as follows: the thickness of the slag collecting runner 4 is H2, and the half of the maximum width is L2; The thickness of the channel 7 is H1, and the maximum width is L1; the height of the main body of the pressure plate casting 6 is H, and the maximum width is L, wherein the thickness mentioned here is the height of the transverse section of the corresponding runner, and the maximum width is Both are the maximum lengths of the transverse cross-sections of the corresponding runners; since the pressure disc castings are annular structures, the maximum lengths of the pressure disc castings are the maximum ring widths of the pressure disc castings.

The above parameters meet the following conditions:

H1=(1.5-2)H; L1=(1.1-1.3)L;

H2=(1.2-1.5)H1; L2=(1.2-1.4)L1.

In a preferred embodiment, the gating system unit includes two pressure disc castings 6 arranged symmetrically on the left and right sides, the slag collecting runner 4 is connected below the vertical runner 3, and the two slag collecting runners 4 are on both sides of the two slag collecting runners 4. An intermediate runner 7 is respectively connected, and each intermediate runner 7 is connected to a pressure plate casting 6,.

Referring to FIG. 4 , in order to satisfy the feeding requirement and to make the filling of molten iron stable, the continuous blanking runner according to the present invention is preferably arranged in the following manner: the slag collecting runner 4 is arranged on the two pressure plate castings 6 Below, the pressure disc casting 6 and the intermediate runner 7 are overlapped to form the first water inlet A, and the overlap width is 2.5-3.5mm; the overlap length is T _A ; the intermediate runner 7 and the slag runner (4 ) lap to form the second water inlet, the lap width is _3.5-5mm ; the lap length is TB, the lap length TA and TB of the water inlet _A and the water inlet _B are the same, and the specific length is based on the product’s charging The molding time should be adjusted; the vertical runner adopts a standard trapezoidal runner, and its cross-sectional area should be adjusted according to the product filling time, and the cross-sectional area is at least 300mm ² ; the height of the vertical runner is at least higher than the pressure Disc casting top 60mm.

Furthermore, the vertical runner 3 is connected to the runner 1 through the runner 2 at one end away from the slag collecting runner 4, and at least An interconnected sheet runner 5, the sheet runner 5 and the runner 2 can filter impurities in the molten iron, and at the same time can prevent the turbulent flow that occurs when the molten iron directly flows into the vertical runner.

The invention innovatively proposes a casting and pouring system for the clutch gray iron pressure plate, which has the following advantages in practical application: First, the feeding method of the top riser in the original process is modified to the feeding without riser The method perfectly solves the shrinkage defect at the position of the riser. At the same time, the bottom edge type water entry is further formed by the overlapping design between the inner runner and the outer edge of the casting, and the overlapping part can be easily removed in the follow-up and omitted. The step of manual grinding greatly improves the efficiency of subsequent cleaning and reduces labor intensity; secondly, the riser-free method greatly improves the yield of the process, saves a lot of molten iron, and thus saves production costs; the new process has undergone a large number of production verifications, not only Being able to stabilize production can also greatly improve production efficiency, which is worthy of promotion.

Claims (5)

1. A casting and gating system for a clutch gray iron pressure plate, comprising at least one gating system unit, characterized in that the gating system unit includes at least one pressure plate casting (6), and the pressure plate casting (6) is connected to a a continuous blank-holder runner, the continuous blank-holder runner sequentially comprises a vertical runner (3), a slag collecting runner (4) and an intermediate runner (7) that are connected to each other; The pressure plate casting (6) is overlapped with the intermediate runner (7) to form a first water inlet (A), and the overlap width is 2.5-3.5mm; The intermediate runner (7) and the slag collecting runner (4) are overlapped to form a second water inlet (B); the overlap width is 3.5-5mm; The overlapping lengths of the first water inlet (A) and the second water inlet (B) are the same; The thickness H2 of the slag collecting runner (4), the half of the maximum width is L2; the thickness of the intermediate runner (7) is H1, and the width is L1; the main body height of the pressure plate casting (6) is H, The maximum width is L, and the above parameters satisfy the following conditions: H1=(1.5-2)H; L1=(1.1-1.3)L; H2=(1.2-1.5)H1; L2=(1.2-1.4)L1. 2 . The casting and gating system for clutch gray iron pressure plate according to claim 1 , characterized in that it comprises two pressure plate castings ( 6 ) symmetrically arranged on the left and right, and one is connected below the vertical runner ( 3 ). 3 . A slag collecting runner (4), the slag collecting runner (4) is respectively connected with an intermediate runner (7), and each intermediate runner (7) is connected with a pressure plate casting (6). 3. A casting and gating system for clutch gray iron pressure plate according to claim 2, characterized in that, the vertical runner (3) adopts a standard trapezoidal runner, and the cross-sectional area is at least 300mm ² . The height of the vertical runner (3) is at least 60mm higher than the top of the pressure plate casting (6). 4. The casting and gating system for a clutch gray iron pressure plate according to any one of claims 1 to 3, characterized in that the lateral direction of the slag collecting runner (4) and the intermediate runner (7) is The cross-sectional shape is trapezoidal with a draft angle of 3° to 5°. 5. The casting gating system for clutch gray iron pressure plate according to claim 4, characterized in that, the gating system is connected with the runner (1) through the runner (2), and the runner (1) At least one interconnected sheet runner (5) is arranged between (1) and (2), and the thickness of the sheet runner is 2-3 mm.

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