CN215966165U

CN215966165U - Bearing cap production die with weight reduction grooves

Info

Publication number: CN215966165U
Application number: CN202122454295.8U
Authority: CN
Inventors: 李晓符; 高振博; 陆启荣; 李原
Original assignee: YULIN DAZHI MACHINERY FITTINGS CO Ltd
Current assignee: YULIN DAZHI MACHINERY FITTINGS CO Ltd
Priority date: 2021-10-12
Filing date: 2021-10-12
Publication date: 2022-03-08
Anticipated expiration: 2031-10-12

Abstract

The utility model discloses a bearing cap production die with weight reduction grooves, belongs to the technical field of casting tools, and solves the problem of shrinkage failure during production of bearing caps by iron mold casting. This production mould includes swage, swage and a plurality of psammitolite down, the psammitolite level place at last swage, down between the swage, just it forms the bearing cap that the one deck is horizontal distribution between swage, lower swage and the psammitolite respectively and becomes the die cavity, and every the psammitolite all corresponds and is formed with a plurality of bearing caps and becomes the die cavity, the top of going up the swage is equipped with the pouring basin, adjacent two with one side be equipped with the cross gate between the psammitolite, every all be equipped with the rising head in the sand core, pouring basin, cross gate, rising head communicate in proper order, just rising head and a plurality of bearing caps become the die cavity intercommunication. According to the bearing cap production die with the weight reduction grooves, the shrinkage and shrinkage faults are eliminated and the utilization rate of molten iron is improved by adopting a casting double-layer placing process method.

Description

Bearing cap production die with weight reduction grooves

Technical Field

The utility model relates to the technical field of casting tools, in particular to a bearing cap production die with weight reduction grooves.

Background

The bearing cap is one of the important parts of the engine, the bearing cap and the cylinder body together fix the crankshaft and bear the alternating load applied by the reciprocating motion of the crank-connecting rod mechanism, and the fatigue strength of the bearing cap directly influences the service life of the cylinder body. The material brand of the bearing cover is QT600-3, the casting quality and performance requirement are higher, and defects such as shrinkage cavity, shrinkage porosity and pin hole are not allowed in the casting. Because the quality of the nodular cast iron bearing cover cast produced by adopting the common sand mold casting process is difficult to ensure, the nodular cast iron bearing cover cast is produced by adopting the iron-type precoated sand casting process.

The sand-lined casting of the iron mold is a casting method for forming a high-strength cavity by covering a layer of thin sand on the inner cavity of the metal mold, the casting mold consisting of the iron mold and the thin sand mold has high rigidity, small deformation and quick cooling, and the obtained casting has high dimensional precision, small machining allowance and compact structure, thereby being particularly suitable for the production of nodular cast iron.

As shown in fig. 1, in the prior art, when the bearing cap (c) is produced, the pouring gate is arranged at the middle position according to the existing casting process, the pouring channel (b) is poured from the middle to the two ends, and the products at the two ends of the iron mold (a) are easy to cool molten iron and have shrinkage faults because the flowing path of the pouring channel (b) is long, so that the rejection rate of the produced products is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problems in the prior art, and provides a bearing cap production mold with weight reduction grooves.

The technical scheme adopted by the utility model is as follows: the utility model provides a bearing cap production mould of heavy groove in area, includes last swage, lower swage and a plurality of psammitolite, the psammitolite level place last swage, down between the swage, just it forms the bearing cap molding cavity that the one deck is horizontal distribution respectively to go up between swage, lower swage and the psammitolite, and every the psammitolite all corresponds and is formed with a plurality of bearing cap molding cavities, the top of going up the swage is equipped with the pouring basin, with adjacent two of one side be equipped with the cross gate between the psammitolite, every all be equipped with the rising head in the sand core, pouring basin, cross gate, rising head communicate in proper order, just the rising head with a plurality of bearing cap molding cavities intercommunication, just the side of rising head and bearing cap opening one end corresponding.

As a further improvement, a weight-reducing lug is arranged in the bearing cover molding cavity.

Furthermore, the upper iron mold and the lower iron mold are internally provided with sand coating layers, the sand coating layers corresponding to the upper iron mold are provided with chutes, and the sprue cup is movably inserted on the chutes.

Furthermore, a sand collecting groove is arranged on the sand coating layer at the bottom of the inclined groove.

Furthermore, a circular ceramic filter screen is arranged between the sprue cup and the sand-coated layer of the upper iron mold.

Furthermore, the number of the sand cores is four, eight bearing cover forming cavities are correspondingly formed in each sand core, sixteen bearing cover forming cavities are formed between the upper iron mold and the four sand cores and between the lower iron mold and the four sand cores, and each bearing cover forming cavity is communicated with the riser through the ingate.

Advantageous effects

Compared with the prior art, the utility model has the following advantages:

according to the bearing cover production die with the weight reduction grooves, the bearing covers are arranged in the horizontal distribution sand cores in the forming cavities and are uniformly distributed in two layers, molten iron flows into the upper layer and the lower layer of the bearing cover forming cavities through the risers, so that the distance of the molten iron flowing into the bearing cover forming cavities is short, the forming effect is good, a plurality of bearing covers can be produced simultaneously, the production efficiency is greatly improved on the premise of not influencing the production quality, and the bearing cover production die has the characteristics of convenience in use and wide application range.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic view showing a structure of a process of installing a sand core in a lower iron mold according to the present invention;

FIG. 4 is an enlarged schematic view of the structure of the sand core of the present invention;

FIG. 5 is a schematic view of a bearing cap produced in accordance with the present invention;

FIG. 6 is a schematic view of a portion of a bearing cap produced in accordance with the present invention;

FIG. 7 is a schematic structural diagram of a sand lining process of an upper iron mold in the present invention;

FIG. 8 is a schematic view of the structure of the upper iron mold and the pouring cup in the present invention.

Wherein: 1-sand core, 2-bearing cover molding cavity, 3-lower iron mold, 4-upper iron mold, 5-bearing cover, 6-pouring cup, 7-chute, 8-sliding insert, 9-sand coating layer, 10-weight reducing lug, 11-weight reducing groove, 12-cross runner, 13-round ceramic filter screen, 14-riser, 15-filter screen mounting groove, 16-inner runner, 17-sand collecting groove and 18-straight runner.

Detailed Description

The utility model will be further described with reference to specific embodiments shown in the drawings.

Referring to fig. 2-8, a bearing cover production mold with a weight reduction groove comprises an upper iron mold 4, a lower iron mold 3 and a plurality of sand cores 1, wherein the sand cores 1 are horizontally arranged between the upper iron mold 4 and the lower iron mold 3, a layer of horizontally distributed bearing cover forming cavities 2 is respectively formed between the upper iron mold 4 and the lower iron mold 3 and the sand cores 1, each sand core 1 is correspondingly provided with a plurality of bearing cover forming cavities 2, the top of the upper iron mold 4 is provided with a sprue cup 6, a cross gate 12 is arranged between two adjacent sand cores 1 on the same side, each sand core 1 is internally provided with a riser 14, the sprue cup 6, the cross gate 12 and the riser 14 are sequentially communicated, the riser 14 is communicated with the plurality of bearing cover forming cavities 2 and corresponds to the side surface of one end of the opening of the bearing cover, after the sand cores 1 are placed into the lower iron mold 3, the upper iron mold 4 is closed with the lower iron mold 3 through a positioning pin and placed on the upper iron mold 4, when pouring molten iron, the molten iron is shunted to the riser 14 through the cross gate 12 after entering from the pouring cup 6, and then is shunted to each bearing cover molding cavity 2 of the upper layer and the lower layer by the riser 14, a plurality of bearing covers molding cavities 2 in the sand core 1 share the same cross gate 12, the utilization rate of the molten iron is effectively improved, the molten iron stored in the riser 14 has feeding effect on the bearing cover 5 of preliminary molding, the pressure is increased on the bearing cover 5 of lower-layer molding, and the compact bearing cover casting is favorable for obtaining the compact bearing cover casting.

Specifically, the bearing cap forming cavity 2 is internally provided with a weight reducing lug 10, and the horizontally arranged bearing cap forming cavity 2 can be designed with the weight reducing lug 10, so that the bearing cap 5 with a weight reducing groove can be produced.

Preferably, the upper iron mold 4 and the lower iron mold 3 are both provided with a sand coating layer 9, the corresponding sand coating layer 9 on the upper iron mold 4 is provided with a chute 7, the sprue cup 6 is movably inserted on the chute 7, the sand coating layer 9 at the bottom of the chute 7 is provided with a sand collecting groove 17, a circular ceramic filter screen 13 is arranged between the sprue cup 6 and the sand coating layer 9 of the upper iron mold 4, before the sand coating of the upper iron mold 4 is carried out, a reverse taper sliding insert 8 is firstly installed at the upper part, when the sand coating of the upper iron mold 4 is fired, the sliding insert 8 can form the chute 7 and the filter screen installation groove 15 which are matched with the sprue cup 6, after the sand coating layer 9 is sintered, the sliding insert 8 is taken out from the top of the iron mold, the circular ceramic filter screen 13 is placed in the filter screen installation groove 15, then the sand core sprue cup 6 is inserted into the chute 7 on the iron mold, when the sprue cup 6 is inserted, the sprue cup 6 and the upper iron mold 4 are in tight fit, and mutually rubbed and fall off, the loose sand will be washed with the iron water onto the product, so that a sand collecting trough 17 is arranged at the bottom of the chute 7 for collecting the loose sand brought in during installation.

Furthermore, four sand cores 1 are arranged, eight bearing cover forming cavities 2 are correspondingly formed in each sand core 1, the bearing cover forming cavities 2 between the upper iron mold 4 and the four sand cores 1 and between the lower iron mold 3 and the four sand cores 1 are sixteen, each bearing cover forming cavity 2 is communicated with the riser 14 through the ingate 16, molten iron flows to each bearing cover forming cavity 2 through the riser 14, thirty-two bearing covers 5 can be formed through one-time pouring, and the produced bearing covers 5 are good in forming effect due to the fact that the distance of the molten iron flowing into the bearing cover forming cavities 2 is short, shrinkage faults are not prone to occurring, production quality is improved, and meanwhile production efficiency is improved.

When the bearing cover production mold with the weight reduction grooves is used, the upper iron mold 4 and the lower iron mold 3 are firstly assembled, a layer of horizontally distributed bearing cover forming cavities 2 is formed among the upper iron mold 4, the lower iron mold 3 and the sand cores 1 respectively, then molten iron is poured between the upper iron mold 4 and the lower iron mold 3, the molten iron flows to the riser 14 through the cross runner 12 after entering from the pouring gate, then flows into the cavities 2 formed by the upper bearing cover and the lower bearing cover through the riser 14, after the molten iron is cooled, the upper iron mold 4 is separated from the lower iron mold 3, the sprue cup 6 and the sprue 18 are separated from the iron molds, and after the sand cores 1 are removed, the plurality of bearing covers 5 with the weight reduction grooves can be obtained. According to the bearing cover production die with the weight reduction grooves, the bearing cover forming cavities 2 are arranged in the horizontal distribution sand cores 1 and are uniformly distributed in two layers, the upper layer bearing cover forming cavities 2 and the lower layer bearing cover forming cavities 2 all flow in molten iron through the risers 14, so that the bearing cover 5 with the weight reduction grooves 11 can be produced, meanwhile, the distance of the molten iron flowing into the bearing cover forming cavities 2 is short, the forming effect is good, the shrinkage and shrinkage porosity faults are eliminated, a plurality of bearing covers can be produced simultaneously, the production efficiency is greatly improved on the premise of not influencing the production quality, and the bearing cover production die has the characteristics of strong practicability and wide application range.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the structure of the utility model, which will not affect the effect of the utility model and the practicability of the patent.

Claims

1. A bearing cover production mold with a weight reduction groove comprises an upper iron mold (4), a lower iron mold (3) and a plurality of sand cores (1), and is characterized in that the sand cores (1) are horizontally placed between the upper iron mold (4) and the lower iron mold (3), a layer of bearing cover forming cavities (2) which are horizontally distributed are respectively formed between the upper iron mold (4), the lower iron mold (3) and the sand cores (1), each sand core (1) is correspondingly provided with a plurality of bearing cover forming cavities (2), a sprue cup (6) is arranged at the top of the upper iron mold (4), a cross gate (12) is arranged between every two adjacent sand cores (1) on the same side, a riser (14) is arranged in each sand core (1), the sprue cup (6), the cross gate (12) and the riser (14) are sequentially communicated, and the riser (14) is communicated with the plurality of bearing cover forming cavities (2), and the riser (14) corresponds to the side surface of one end of the opening of the bearing cover.

2. The mold for producing a bearing cap with weight-reducing slots as claimed in claim 1, wherein the bearing cap forming cavities (2) are provided with weight-reducing projections (10).

3. The mold for producing the bearing cap with the weight-reducing groove as recited in claim 1, wherein the upper iron mold (4) and the lower iron mold (3) are both provided with a sand-coated layer (9), the corresponding sand-coated layer (9) on the upper iron mold (4) is provided with a chute (7), and the sprue cup (6) is movably inserted on the chute (7).

4. A mould for producing bearing caps with weight-reducing slots according to claim 3, wherein the sand-coating layer (9) at the bottom of the inclined chute (7) is provided with sand-collecting slots (17).

5. The mold for producing a bearing cap with a weight-reducing slot as recited in claim 1, wherein a circular ceramic screen (13) is disposed between the pouring cup (6) and the sand-coated layer (9) of the upper iron mold (4).

6. The mold for producing the bearing cover with the weight reducing grooves as claimed in claim 1, wherein the number of the sand cores (1) is four, eight bearing cover forming cavities (2) are correspondingly formed in each sand core (1), sixteen bearing cover forming cavities (2) are formed between the upper iron mold (4) and the four sand cores (1) and between the lower iron mold (3) and the four sand cores (1), and each bearing cover forming cavity (2) is communicated with the riser (14) through an inner runner (16).