阅读说明：本技术 一种缸盖水套砂芯铸造模具的排气机构 (Exhaust mechanism of cylinder cover water jacket sand core casting mould ) 是由 郑端阳 于 2018-09-03 设计创作，主要内容包括：一种缸盖水套砂芯铸造模具的排气装置,把上芯盒中形状狭小壁薄地方挖空成嵌入型,利用镶件加工形成形状并安装在上芯盒嵌入型中,间隙配合。上芯盒镶件垂直于形状切割排气槽,根据芯砂类型设定排气槽宽。与上芯盒镶件配合的上芯盒嵌入型留有排气空腔和排气孔。与通用的镶件和嵌入型间隙排气相比,本装置的排气方式比之增加数倍,排气效果最好,且不易堵塞。定期清理时单独拆卸镶件即可。(An exhaust device of a casting mold of a cylinder cover water jacket sand core is characterized in that a narrow-shaped thin-wall part in an upper core box is hollowed into an embedded type, and the shape is formed by machining an insert and is installed in the embedded type of the upper core box in a clearance fit mode. The insert of the upper core box is vertical to the shape cutting exhaust groove, and the width of the exhaust groove is set according to the type of core sand. An exhaust cavity and an exhaust hole are reserved in the embedded type of the upper core box matched with the insert of the upper core box. Compared with the common insert and embedded gap exhaust, the exhaust mode of the device is increased by several times, the exhaust effect is best, and the device is not easy to block. The insert is detached independently during regular cleaning.)

1. The utility model provides an exhaust apparatus of cylinder cap water jacket psammitolite casting mould which characterized in that: the device comprises an upper fixing plate, a first upper core box insert, a second upper core box insert, an upper core box and an embedded groove;

the upper core box is fixedly arranged on the upper fixing plate through screws; the first upper core box insert and the second upper core box insert are arranged in an embedded groove which is processed in advance in an upper core box, and an exhaust hole is arranged in the embedded groove and penetrates through the upper core box and the upper fixing plate;

the shape parts of the first upper core box insert and the second upper core box insert only keep the thickness of 2-2.5 mm, and the rest parts are hollowed out; the shape parts are all cut with exhaust grooves, and the width of each groove is 0.2-0.25 mm;

an exhaust cavity is reserved on the bottom surface of the embedded groove and the bottom surface of the insert, and the embedded groove is rectangular.

Technical Field

The invention relates to an exhaust mechanism of a casting mold of a cylinder cover water jacket sand core, belonging to the field of machine manufacturing.

Background

Sand casting is a casting which is made by using a mould and other process equipment to make a 'sand mould', filling liquid metal into the sand mould, and cooling to obtain the casting. Compared with other dies, the die is more complex, and extremely complex products such as engine cylinder covers and the like can be produced.

The sand core of the water jacket of the automobile engine cylinder cover is the most complex and irregular sand core of the engine cylinder cover, is difficult in mold design and also difficult in sand core production, and has the lowest yield. The water jacket sand core of the engine cylinder cover is complex in shape and has thin wall and narrow positions, and the positions cannot be provided with an exhaust plug or an exhaust groove on a die, so that the water jacket sand core is loosened and sand shooting is not practical in the core making process. The universal exhaust mode is that the inserts are made at the positions, the gap between the insert and the core box body is used for exhausting, the exhaust mode is feasible at the place where the sand core is slightly thick, when the thickness of the sand core is smaller than 6mm and the condition that the flowing of the sand core is influenced by blocking nearby, the exhaust mode is often not enough to compact the filling of the sand core, so that the sand core is loosened or sintered during later pouring.

Disclosure of Invention

The invention aims to solve the technical problem of providing a water jacket sand core casting mold manufacturing process.

In order to solve the technical problem, the invention is realized as follows:

an exhaust device of a cylinder cover water jacket sand core casting mold comprises an upper fixing plate, a first upper core box insert, a second upper core box insert, an upper core box and an embedded groove;

the upper core box is fixedly arranged on the upper fixing plate through screws; the first upper core box insert and the second upper core box insert are arranged in an embedded groove which is processed in advance in an upper core box, and an exhaust hole is arranged in the embedded groove and penetrates through the upper core box and the upper fixing plate;

the shape parts of the first upper core box insert and the second upper core box insert only keep the thickness of 2-2.5 mm, and the rest parts are hollowed out; the shape parts are all cut with exhaust grooves, and the width of each groove is 0.2-0.25 mm;

an exhaust cavity is reserved on the bottom surface of the embedded groove and the bottom surface of the insert, and the embedded groove is rectangular.

The invention has the positive effects that: the device produces the compact and complete water jacket sand core through reasonable structural design, improves the characteristics of easy blockage and unsmooth exhaust effect of the existing exhaust mode, reduces the cleaning frequency of mould exhaust, lightens the cleaning burden and improves the use efficiency of the tool.

Drawings

FIG. 1 is a schematic view of the overall structure of the apparatus;

FIG. 2 is a side view of the mounting shaft of the insert and core box;

FIG. 3 is a front view of the insert;

FIG. 4 is a side view of the insert;

wherein: 1-upper fixing plate, 2-upper core box insert 1#, 3-upper core box insert 2#, 4-upper core box.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 2-3, the exhaust device of the casting mold for the water jacket sand core of the cylinder head comprises an upper fixing plate (1), an upper core box insert 1# (2), an upper core box insert 2# (3), an upper core box (4) and an embedded groove (5).

The upper core box (4) is fixedly arranged on the upper fixing plate (1) through screws; the upper core box insert 1# (2) and the upper core box insert 2# (3) are arranged in a prefabricated embedded groove (5) of the upper core box, and an exhaust hole is arranged in the embedded groove (5) and penetrates through the upper core box (4) and the upper fixing plate (1).

The shapes of the upper core box insert 1# (2) and the upper core box insert 2# (3) are only reserved with the thickness of 2-2.5 mm, and the rest parts are hollowed; the shape part is cut with an exhaust groove with the width of 0.2-0.25 mm.

An exhaust cavity is reserved on the bottom surfaces of the embedded grooves (5) corresponding to the inserts 1# and 2# and 3 # of the upper core box and the insert 2# of the upper core box and the shape of the insert, and the embedded grooves (5) are rectangular and are positioned with the inserts.

The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.