CN209021175U - A sand-covered molding machine for double-sided cavity iron molds - Google Patents

Abstract

The utility model relates to a sand-covered molding machine for iron molds with double-sided cavity, which belongs to the field of machinery. The molding machine of the utility model comprises an upper beam, a base, a vertical column, a sand shooting device, an upper mold opening and closing mechanism, a lower mold opening and closing mechanism, an iron mold conveying mechanism, an iron mold upper blocking mechanism, a sand bucket and an automatic sand adding mechanism. The device includes a mobile sand-shooting head, a sand-shooting plate, a lower-pressure sand-shooting device and a mobile sand-shooting head track. The mobile sand-shooting head is set on the mobile sand-shooting head track, the mobile sand-shooting head track is fixed on the base, and the sand-shooting plate is set On the mobile sand shooting head, the lower pressure sand shooting device, the upper mold opening and closing mechanism, the sand bucket and the automatic sand feeding mechanism are all installed on the upper beam, and the lower mold opening and closing mechanism, the iron type conveying mechanism and the iron type upper stop mechanism are all installed on the upper beam. Mounted on the base. The utility model has the advantages of reasonable overall structure, safety, reliability and convenient operation, and can simultaneously carry out sand-blasting and sand-covering modeling for the double-sided mold cavity iron mold cavity.

Description

A sand-covered molding machine for double-sided cavity iron molds

technical field

The utility model relates to a molding machine, in particular to a sand-covered molding machine and a molding production method for double-sided cavity iron molds, which belong to the field of machinery.

Background technique

Iron mold sand-coated casting is one of the special castings. The mold is formed by coating a thin layer of coated sand on the inner cavity of the metal mold. Sand-coated iron casting has the characteristics of energy saving, material saving, high efficiency, high quality and green production.

The casting mold of iron mold sand-covered casting generally adopts the method of sand-shot and sand-covered molding and horizontal parting, that is, the iron mold is generally designed into two planes, the upper and lower planes, which are arranged horizontally. The plane of the plate is in horizontal contact, and the upper plane of the iron mold is in horizontal contact with the plane of the sand-shooting plate. In the production, the upper iron mold and the lower iron mold are respectively shot with sand and covered with sand, and then the upper and lower iron molds are closed to form a complete casting mold, that is to say, only one side of each iron mold forms the cavity of the casting, and the other One side is just a flat surface, and the upper and lower iron molds are combined to form a complete casting cavity.

With the continuous expansion of the application area of iron mold sand coating, the complexity and shape of castings are ever-changing. For some small product parts, such as: no matter from the process or the yield of molten iron, and the waste heat required for iron mold sand coating molding In other words, the product is not very suitable for the production method of ordinary horizontal parting single-sided cavity iron type. In order to meet the requirements of sand-covered casting production of iron molds for this type of product, the iron mold with double-sided cavity has been developed. The sand-covered molding of the single-sided cavity of the profile is very different. It is necessary to mold a piece of iron mold with upper and lower cavities at the same time. The existing iron-type sand-covered molding machine cannot meet this requirement, and must be completely new. Only by developing its matching iron mold sand-covered molding machine for double-sided cavities can the iron mold and sand-covered casting production of double-sided cavities be realized.

The publication date is February 2, 2018, and in the Chinese patent with the publication number 104226922B, a utility model patent named "a horizontally divided iron mold sand-covered molding system" is disclosed. The patent includes an iron mold upper mold, an iron mold lower mold, and a mold plate system. The mold plate system consists of a runner system model, a mold plate, a feeding riser model, a casting ball model and a positioning pin; the feeding riser or casting ball A ventilation needle is fixedly installed on the upper end of the model, and the number of ventilation needles is at least one, and the shape and size of the ventilation needles are the same. Although this structure, because the ventilation needle is fixedly installed on the upper end of the feeding riser or the casting ball model, and the number of ventilation needles is at least one, the shape and size of the ventilation needles are the same, so that the shape and size of each ventilation needle can be the same. Ventilation holes with the same shape and size are automatically formed on the sand layer, but they are not suitable for the production of complex castings, so they still have the above defects.

Therefore, it is particularly necessary to provide a reasonable structure design, which can realize the sand-blasting and sand-covering modeling and production method of the double-sided cavity iron mold cavity at the same time.

Utility model content

The purpose of the utility model is to overcome the above-mentioned deficiencies in the prior art, and to provide a kind of reasonable structure design, safe and reliable, easy to operate, which can simultaneously carry out sand-blasting and sand-covering modeling for the double-sided cavity iron mold cavity. A sand-covered molding machine for double-sided cavity iron molds that is easy to realize the production of iron mold sand-covered casting.

The technical scheme adopted by the present utility model to solve the above problems is as follows: the sand-covered molding machine for iron molds with double-sided cavities includes an upper beam, a base and a column, and the upper beam and the base are connected by a column. It also includes a sand shooting device, an upper mold opening and closing mechanism, a lower mold opening and closing mechanism, an iron-type conveying mechanism, an iron-type upper block mechanism, a sand bucket and an automatic sand adding mechanism, and the sand shooting device includes a mobile sand shooting head, The sand-shooting plate, the lower-pressure sand-shooting device and the mobile sand-shooting head track. The mobile sand-shooting head is movably arranged on the mobile sand-shooting head track. The upper and lower sand injection devices include a hydraulic compaction cylinder, a compaction head and a compressed air intake pipe. The hydraulic compaction cylinder is installed on the upper beam, and the hydraulic compaction cylinder is provided with a compaction head. The hollow piston rods of the hydraulic compaction cylinder are connected, the lower pressure sand injection device, the upper mold opening and closing mechanism, the sand bucket and the automatic sand feeding mechanism are all installed on the upper beam, and the lower mold opening and closing mechanism, the iron mold conveying mechanism and the iron mold are installed The blocking mechanism is installed on the base, and the iron-type upper blocking mechanism is fixed on the iron-type conveying mechanism.

Preferably, the upper mold opening and closing mechanism of the present invention includes an upper template frame and an upper mold lifting cylinder, the lower mold opening and closing mechanism includes a lower template frame and a lower mold lifting cylinder, and the upper template frame and the lower template frame are respectively connected with the upper mold. The lifting cylinder is connected with the lower mold lifting cylinder, and guide columns are arranged on both the upper template frame and the lower template frame.

Preferably, there are four guide posts on the upper formwork frame and the lower formwork frame of the present invention, and the guide posts on the upper formwork frame and the lower formwork frame move up and down synchronously with the upper formwork frame and the lower formwork frame respectively; The formwork frame and the lower formwork frame are each equipped with four guide columns, which can move up and down with the upper formwork frame and the lower formwork frame to ensure the smooth operation of the upper and lower formwork frames.

Preferably, the iron-shaped conveying mechanism of the present invention is installed on the roller track on the base; under the action of the moving device, the iron-shaped conveying mechanism can move laterally in and out on the roller track (in the axial direction of the iron mold). perpendicular to each other).

Preferably, the four blocks in the iron-type upper block mechanism of the present invention are fixed on the roller racks on both sides of the iron-type conveying mechanism.

Preferably, the center line of the upper mold opening and closing mechanism of the present invention and the center line of the lower mold opening and closing mechanism are on the same straight line.

Preferably, the upper mold lifting cylinder and the lower mold lifting cylinder of the present invention are air cylinders or hydraulic cylinders.

As a preference, the way that the iron mold of the present utility model enters the sand-shooting station from the external conveying roller table: adopts the form of horizontal and lateral movement along the axis of the iron mold, that is, the iron mold conveying mechanism enters and exits the clamping molding station and is perpendicular to the iron mold axis. ; The iron type moves in and out of the sand shooting station and the sand shooting head moves in a 90° arrangement.

Preferably, the sand-shooting device of the present invention adopts a device that presses down the sand-shooting head and fixes the sand-shooting head to prevent the sand-shooting head from moving backward.

Preferably, the sand-shooting head of the utility model moves back and forth horizontally, and the moving direction is parallel to the axis of the iron mold.

Preferably, the sand-shooting method of the present invention adopts the vertical side of the iron mold to shoot the sand horizontally, and the sand-shooting holes in the sand-shooting plate on the moving sand-shooting head are arranged horizontally, and the upper and lower cavities of the iron mold are shot at the same time. Sand on sand.

Compared with the prior art, the utility model has the following advantages and effects: 1. The overall structure design is reasonable, safe and reliable, and the operation is convenient, which can simultaneously carry out sand-blasting and sand-covering modeling for the double-sided cavity iron-type cavity; 2. . This molding device can directly transfer the iron mold to the iron mold conveying roller table of the production line, and it is easy to realize the mechanization of the iron mold sand-coated casting production.

Description of drawings

FIG. 1 is a schematic front view of the structure of a double-sided cavity iron-type sand-covered molding machine according to an embodiment of the present invention.

Fig. 2 is a left side structural schematic diagram of the double-sided cavity iron-type sand-covered molding machine according to the embodiment of the present invention.

FIG. 3 is a schematic view of the structure of the right side view of the double-sided cavity iron-type sand-covered molding machine according to the embodiment of the present invention.

4 is a schematic structural diagram of the sand-shooting device of the upper mold opening and closing mechanism and the lower mold opening and closing mechanism in the molding machine according to the embodiment of the present invention.

5 is a schematic structural diagram of a sand shooting device in a molding machine according to an embodiment of the present invention.

6 is a schematic diagram of the starting position of the iron mold sand-covered molding process according to the embodiment of the present invention.

7 is a schematic front view of the structure of the iron mold mobile trolley entering the molding station during the iron mold sand-covered molding process according to the embodiment of the present invention.

8 is a schematic view of the structure of the right side view of the iron mold mobile trolley entering the molding station during the iron mold sand-covered molding process according to the embodiment of the present invention.

9 is a schematic structural diagram of the upper and lower molds and the iron mold clamping in the working process of the iron mold sand-covered molding process according to the embodiment of the present invention.

10 is a schematic structural diagram of the moving sand-shooting head moving into the sand-shooting station during the iron mold sand-covering molding process according to the embodiment of the present invention.

11 is a schematic structural diagram of the hydraulic compaction cylinder pressing down on the moving sand-shooting head to shoot sand during the iron mold sand-covering molding process according to the embodiment of the present invention.

FIG. 12 is a schematic structural diagram of the sand-covered molding completed during the iron mold sand-covered molding process according to the embodiment of the present invention.

In the figure: sand shooting device 1, upper mold opening and closing mechanism 2, lower mold opening and closing mechanism 3, upper beam 4, base 5, column 6, iron type conveying mechanism 7, iron type upper stop mechanism 8, sand bucket 9, automatic Sand adding mechanism 10, moving sand-shooting head 11, sand-shooting plate 12, lower-pressure sand-shooting device 13, moving sand-shooting head track 14, hydraulic compaction cylinder 131, compaction head 132, compressed air intake pipe 133, upper template Rack 21, upper mold lifting cylinder 22, guide column 23, lower template frame 31, lower mold lifting cylinder 32, iron mold upper cavity sand shooting hole A, iron mold lower cavity sand shooting hole B, sand shooting plate sand shooting hole C.

Detailed ways

The present utility model will be further described in detail below with reference to the accompanying drawings and the embodiments. The following embodiments are the explanations of the present utility model and the present utility model is not limited to the following embodiments.

Example.

Referring to FIGS. 1 to 12 , the sand-covered molding machine for double-sided cavity iron molds in this embodiment includes an upper beam 4 , a base 5 , a column 6 , a sand shooting device 1 , an upper mold opening and closing mechanism 2 , and a lower mold opening and closing Mechanism 3 , iron type conveying mechanism 7 , iron type upper stop mechanism 8 , sand bucket 9 and automatic sand adding mechanism 10 , the upper beam 4 and the base 5 are connected by the column 6 .

Referring to FIG. 5 , the sand-shooting device 1 in this embodiment includes a mobile sand-shooting head, a sand-shooting plate, a lower-pressure sand-shooting device, and a mobile sand-shooting head track. The sand head track is fixed on the base 5, the sand shooting plate is set on the mobile sand shooting head, and the lower pressure sand shooting device includes a hydraulic compaction cylinder, a compaction head and a compressed air intake pipe, and the hydraulic compaction cylinder is installed on the upper beam 4. A compaction head is set on the hydraulic compaction cylinder. The compressed air intake pipe is connected to the hollow piston rod of the hydraulic compaction cylinder. 10 are installed on the upper beam 4 , the lower mold opening and closing mechanism 3 , the iron type conveying mechanism 7 and the iron type upper stopper mechanism 8 are all installed on the base 5 , and the iron type upper stopper mechanism 8 is fixed on the iron type conveying mechanism 7 .

From Figure 1 to Figure 3, the iron type conveying mechanism 7 of this embodiment is installed on the roller track on the base 5, and can move in and out laterally on the track (perpendicular to the axial direction of the iron type), that is: the iron type Move into or out of the sand-covered sand-shooting molding station. The four blocks in the iron-type upper block mechanism 8 are fixedly installed on the roller racks on both sides of the iron-type in-and-out conveying mechanism.

Referring to FIG. 4 , in this embodiment, the upper mold opening and closing mechanism 2 is fixed on the upper beam 4 , the lower mold opening and closing mechanism 3 is fixed on the base 5 , and the upper mold opening and closing mechanism 2 includes an upper mold frame 21 and an upper mold lifting cylinder 22 , The lower mold opening and closing mechanism 3 includes a lower template frame 31 and a lower mold lifting cylinder 32. The upper template frame 21 and the lower template frame 31 are respectively connected with the upper mold lifting cylinder 22 and the lower mold lifting cylinder 32. The upper template frame 21 and the lower template are respectively connected. The frame 31 is provided with guide columns 23; the guide columns 23 on the upper formwork frame 21 and the lower formwork frame 31 are both four, and the guide columns 23 on the upper formwork frame 21 and the lower formwork frame 31 are respectively connected with the upper formwork frame 21, The lower formwork frame 31 moves up and down synchronously to ensure that the upper formwork frame 21 and the lower formwork frame 31 move up and down smoothly.

The function of the compressed air in and out of the pipeline is to pass the compressed air into the shooting cavity of the mobile sand shooting head 11 when the sand is shot and covered with sand. The compressed air passage of the pipeline is in the hollow piston rod of the hydraulic compaction cylinder 13, that is, the The piston rod is a hollow rod.

The movable sand-shooting head 11 is installed on the movable sand-shooting head track 16 on the base 5, and the movable sand-shooting head 11 can make a reciprocating motion on the track (parallel to the axial direction of the iron mold) under the action of the moving device, so that the The sand head is in contact with or disengaged from the vertical side planes of the iron mold and the upper and lower mold plates to carry out the sand-covered sand-shot molding operation; the moving device can be driven by pneumatic, motor, or hydraulic pressure, all of which are conventional operating devices and no longer Repeat.

In this embodiment, there are four uprights 6 , and the upper beam 4 and the base 5 are connected to form an integral structure through the four uprights 6 .

The four blocks in the iron-type upper block mechanism 8 in this embodiment are fixed on the roller table frames on both sides of the iron-type conveying mechanism 7 .

In this embodiment, the center line of the upper mold opening and closing mechanism 2 and the center line of the lower mold opening and closing mechanism 3 are on the same straight line.

In this embodiment, the upper mold lifting cylinder 22 and the lower mold lifting cylinder 32 are air cylinders or hydraulic cylinders; other structural forms capable of lifting and lowering can also be used.

Referring to Figures 6 to 12, the molding production process of the sand-covered molding machine used for the double-sided cavity iron mold in this embodiment is as follows: the upper and lower cavity molds that form the upper and lower casting cavities of the iron mold are respectively installed in On the upper formwork frame 21 and the lower formwork frame 31 of the molding machine, the upper formwork frame 21 and the lower formwork frame 31 are respectively connected with the corresponding upper die lifting cylinder 22 and lower die lifting cylinder 32, and are respectively moved up or down; Through the production line conveying roller table into the roller table of the iron mold conveying mechanism 7 of the sand coating molding machine, the iron mold conveying mechanism 7 moves laterally perpendicular to the axis direction of the roller table of the conveying mechanism of the sand coating molding machine. After the mold conveying roller table moves into the sand-covered molding station, the lower cavity mold will contact with the lower plane of the iron mold as the lower mold opening and closing mechanism 3 rises, and then continue to rise, so that the conveying edge of the iron mold is separated from the roller surface of the roller table. The upper block mechanism 8 of the iron mold stops after that, and then the upper cavity mold descends with the upper mold opening and closing mechanism 2 and contacts the upper plane of the iron mold, completing the mold clamping action of the upper and lower molds and the double-sided cavity iron mold. Here, the clamping force of the upper clamping mechanism is smaller than the clamping force of the lower clamping mechanism; then the moving sand-shooting head 11 used for sand-shot and sand-covered modeling moves forward along the axis of the roller table until the moving sand-shooting head 11 The plane of the vertical sand-shooting plate 12 is in contact with the vertical sand-shooting plane of the iron mold and the model, and the two vertical planes are completely fitted. together; then the hydraulic compaction cylinder 13 in the lower pressure sand shot device 13 descends, driving the compaction head 14 to descend, and its lower plane contacts the sand shot flange of the mobile sand shot head 11 and compacts tightly. It is completely and tightly fitted with no air leakage, and at the same time, a huge moving friction force is generated on the moving sand shooting head 11, which prevents the moving sand shooting head 11 from moving backward during the subsequent sand shooting process; then the compressed air enters the mobile sand shooting through the compressed air intake pipe 15. Head 11, under the action of the gas pressure of the compressed air, the coated sand in the moving sand-shooting head 11 passes through the sand-shooting holes in the sand-shooting plate 12, and is sprayed into the sand-shooting holes between the iron mold and the model into the iron mold, In the gap between the lower cavity and the upper and lower models, the entire gap is filled, and the sand shooting and covering process of the molding process is completed. After the exhaust of the compressed air is completed, the hydraulic compaction cylinder 13 in the sand shooting device 1 rises to release the Move the huge friction force of the sand shooting head 11, then move the sand shooting head 11 backward, and move the vertical sand shooting plate away from the vertical sand-covering plane of the iron mold and the model, so as to prevent the sand shooting head from contacting the iron mold and the model plane. If the time is too long, the sand-shooting holes in the sand-shooting sand board will be solidified and agglomerated, which will affect the next sand-shooting modeling; then the sand-covered layer in the iron mold begins to solidify. First, carry out the ejection process of the cavity mold on the top of the iron mold. Since the iron mold is completely fixed by the upper stopper, when the upper cavity mold is ejected, the iron mold will not move upward, and the upper mold opening and closing mechanism 2 drives the iron mold to lift the mold. The cavity mold rises to smoothly complete the ejection of the upper cavity of the iron mold; then the lower mold opening and closing mechanism 3 descends, driving the lower mold cavity mold to descend, and at the same time drives the iron mold to descend. When the rollers of the roller table are on the upper edge, the iron type is blocked and no longer descends, but The lower cavity mold of the iron mold continues to descend, and the lower mold cavity of the iron mold gradually separates from the iron mold, until the lower mold cavity model of the iron mold completely separates from the iron mold, and the mold release of the lower mold cavity is completed; then the sand-covered molding machine is conveyed The roller table of the mechanism is moved laterally out of the iron molding station, and the sand-covered molding of the double-sided cavity iron mold is completed.

Referring to FIG. 9 , the sand shooting holes A of the upper mold cavity of the iron mold, the sand shooting holes B of the lower mold cavity of the iron mold, and the sand shooting holes C of the sand shooting plate are arranged correspondingly to each other.

The functions of the hydraulic pressure sand injection device 13 in this embodiment are mainly in two aspects: (1) When the sand is shot and covered with sand, the lower plane of the compaction head 14 is closely attached to the upper plane of the lower flange of the moving sand injection head 11. In order to pass the compressed air into the sand barrel of the mobile sand-shooting head 11 during sand-shooting to carry out the sand-shooting and sand-covering work; (2) When sand-shooting, there should be no gap between the plane of the sand-shooting plate 12 and the vertical side plane of the iron mold and the upper and lower models. Movement is generated to ensure that there is no air leakage and sand running between the two during sand shooting and sand molding; during sand shooting and sand molding, under the action of compressed air, the vertical sand shooting plate 12 on the sand shooting head 11 is moved. There will be a large separation force between the vertical sides of the iron mold, the upper and lower models. The inlet and sand inlet flanges of head 11 are well fitted together to avoid the occurrence of the above two air leakage and sand blasting during sand shooting. Move the compaction head 14 downward and press it on the air inlet and sand inlet flanges of the mobile sand shooting head 11. The planes of the two are completely contacted and sealed together. There will be a huge friction force between the moving wheel and the track on which the moving sand shooting head 11 is placed, which is far greater than the moving sand shooting head 11 during sand shooting. Due to the high pressure of the compressed air, the moving sand shooting head 11 moves backward It can prevent the moving sand-shooting head 11 from moving backward due to the high pressure of the compressed air sand-shooting, so that the vertical sand-shooting plate 12 on the moving sand-shooting head 11 and the iron mold, the upper and the lower The vertical sides of the model are separated, causing sandblasting and air leakage.

After the iron mold is combined with the upper and lower models in this embodiment, many horizontal sand shooting holes are opened on the vertical surface of one end of the iron mold, the upper and lower models, and the parting surfaces of the iron mold and the upper and lower models; The sand holes are completely coincident with those on the vertical sand-shooting plate 12 of the movable sand-shooting head 11, and at the same time, these sand-shooting holes are respectively connected with the upper cavity or the lower cavity of the iron mold. When the vertical sand-shooting plate 12 on the mobile sand-shooting head 11 is in complete contact with the vertical sides of the iron mold, the upper and lower molds, the positions of the sand-shooting plate 12 and the iron mold and the sand shooting holes of the upper and lower molds will be completely overlapping together.

For the ordinary horizontal parting single-sided cavity iron mold, the sand-covered molding needs to be sand-covered for the single-sided cavity that forms the mold cavity, while the other side of the iron mold is flat. The sand shooting board 12 and the iron mold are arranged horizontally. The sand shooting board 12 is located above the upper plane of the iron mold. After the lower plane of the iron mold is closed with the model, it continues to rise until the plane of the sand shooting board 12 and the upper plane of the iron mold. In contact with each other, the sand-shot and sand-covered molding process is as follows: the coated sand vertically passes through the sand-shooting holes of the sand-shooting plate 12 from top to bottom, enters the corresponding sand-shooting holes on the upper plane of the iron mold, passes through the thickness of the iron mold, and then enters the iron mold. The cavity of the mold casting mold is filled with sand and covered with sand, and then solidified and molded, so as to complete the whole process of iron mold and sand-covered molding.

The sand-covered molding process of the double-sided cavity iron mold in this embodiment is completely different from the above-mentioned single-sided cavity iron mold. There are casting mold cavities on the upper and lower sides of an iron mold, and a single iron mold is completed for one shot of sand. The sand-shot and sand-covered modeling of the upper and lower cavities of the mold must be completely different from the sand-shot and sand-covered modeling of the ordinary horizontal parting single-sided iron mold. The sand-covered modeling equipment does not use vertical sand-shooting holes for sand-covering modeling, but uses horizontal sand-shooting holes for sand-covering modeling, that is, the sand-shooting holes are not arranged in the iron mold. The horizontal surface of the upper plane is vertically downward, but is set on the vertical surface of the side of the iron mold. The sand shooting holes can be directly made horizontally on the parting surfaces of the upper and lower cavity of the iron mold. This way of setting the sand shooting holes can simultaneously The upper and lower sides of the iron mold are shot and covered with sand, which is greatly beneficial to the cleaning of the iron mold's sand shooting holes. The sand-covered sand molding method can realize the sand-covered molding of the upper and lower cavities of the iron mold, which brings a new mechanical structure of sand-shot and sand-covered molding.

This embodiment is used for the working principle of the iron mold sand-covered casting of the double-sided cavity iron mold sand-covered molding machine: In the production of iron mold sand-covered casting, two iron molds, the upper and the lower, are generally used, and the upper and lower iron molds are respectively The upper and lower models are modeled by horizontal parting, the upper mold cavity of the casting is formed on one side of the upper iron mold, and the lower mold cavity of the casting is formed on the side of the lower iron mold, that is to say, in each piece of iron. A half cavity of a complete casting mold is formed in the mold, and then the upper and lower iron molds are closed together to form a complete casting cavity. For the iron mold with double-sided cavity, the upper plane of the iron mold finally forms the upper mold cavity of the casting mold, and the lower plane of the iron mold finally forms the lower mold cavity of the casting mold; The sand-covered molding of the upper and lower molds is completed on the iron mold of the cavity, and the sand-covered molding of the upper and lower cavities of the iron mold can be completed by one shot of sand-covered sand on an iron mold sand-covered molding machine, that is, the horizontal The iron mold placed on the roller table is moved into the sand-covered molding station, the molds of the upper and lower cavities are respectively clamped with the upper and lower parting surfaces of the iron mold, and the sand shooting head 11 is moved to make the vertically arranged sand shooting plate 12 and the mold. After the mold is closed, the iron mold and the vertical sand shooting surface of the model are in contact with each other, and the sand is shot to shape, and the sand shot head is removed. After the mold is finished, the iron mold is moved out of the sand injection molding station to connect with the external roller table of the production line, and then the iron mold is sent out of the sand-covering molding machine.

This embodiment develops an iron mold sand-covered molding equipment for double-sided cavity iron molds, which is used for sand-covered molding and casting production of double-sided cavity iron molds; Sand-covered molding is carried out in the cavity, and a whole-shaped sand-covered molding can be completed by using a sand-covered molding machine. .

In this embodiment, the movable iron mold in and out conveying mode is adopted, and the upper and lower sets of sand-covered molding and ejection devices are combined to realize the iron mold in and out, the mold clamping of the upper and lower cavities of the double-sided cavity iron mold, and the sand shooting and coating. Sand-covered molding processes such as sand, solidification, and mold release finally realize the mechanized production of iron-covered sand casting suitable for castings with double-sided cavity iron mold production methods.

The iron mold sand-covered molding device used for double-sided sand-covered molding in this embodiment, that is, the upper and lower molds are respectively combined with the upper and lower cavities of the iron mold, and the sand-covered molding method is simultaneously shot; The method of successively pulling the mold between the model and the iron mold.

In this embodiment, the iron mold enters the sand shooting station from the external conveying roller table: the horizontal and lateral movement along the iron mold axis is adopted.

In this embodiment, the iron mold adopts the horizontal sand-covered sand-shooting method, and the sand-shooting holes in the sand-shooting plate 12 on the movable sand-shooting head 11 are arranged horizontally; the sand-shooting holes on the iron mold are respectively arranged on the top and bottom of the iron mold The profile surface is respectively connected with the upper and lower cavities of the iron profile.

In this embodiment, the sand-shooting device 13 is hydraulically pressed down. The compaction head 14 in the device is lowered, and the lower plane of the device is in contact with the sand-shooting flange of the mobile sand-shooting head 11 and compacted tightly, and the two are completely and tightly fitted. No air leakage, when the sand is shot and covered with sand, the down pressure is greater than the sand shot pressure, and the sand will not escape from between the two; when the sand is shot, the pressure head and the flange of the mobile sand shot head 11 are prevented from being closely attached and the sand will not run away.

The friction force generated by the pressure of the hydraulic compaction cylinder 13 in this embodiment is greater than the separation force between the sand-shooting plate 12 and the iron mold and the model during sand-shooting, so as to ensure that the sand-shooting head will not move backwards horizontally during sand-shooting, so that the sand-shooting head will not move backwards horizontally. When shooting sand, it is in close contact with the iron mold and the model, and it will not cause sand leakage from the contact surface between the sand shooting plate 12 and the iron mold and the model during sand shooting.

In this embodiment, the front and rear movement of the horizontally moving sand shooting head 11 is parallel to the axis of the iron mold, and the iron mold conveying mechanism 7 enters and exits the clamping and molding station perpendicular to the axis of the iron mold. Run smoothly.

This embodiment adopts the structure form of the mobile sand-shooting head 11 for iron-type sand-covered horizontal sand-shooting. In this iron-type sand-covered sand-shooting method, the plane of the sand-shooting plate 12 is perpendicular to the horizontal plane; the iron-type sand-shooting holes can be opened At the parting surface of the iron mold and the upper and lower models, the upper and lower cavities of the iron mold can be shot with sand and covered with sand at the same time.

Through the above description, those skilled in the art have been able to implement.

In addition, it should be noted that the specific embodiments described in this specification may have different shapes and names of parts and components, and the above content described in this specification is only an illustration of the structure of the present invention. All equivalent changes or simple changes made according to the structure, features and principles described in the patent concept of the present utility model are included in the protection scope of the present utility model patent. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, as long as they do not deviate from the structure of the present invention or exceed those defined in the claims. All should belong to the protection scope of the present invention.

Claims (10)

1. a sand-covered moulding machine for double-sided cavity iron type, comprising upper beam, base and upright column, between the upper beam and the base, is connected by upright column, it is characterized in that: also comprise sand-shooting device, upper die The opening and closing mechanism, the lower mold opening and closing mechanism, the iron-type conveying mechanism, the iron-type upper block mechanism, the sand bucket and the automatic sand adding mechanism, and the sand-shooting device includes a mobile sand-shooting head, a sand-shooting plate, a lower-pressure sand-shooting device and The mobile sand-shooting head track is movably arranged on the mobile sand-shooting head track, the mobile sand-shooting head track is fixed on the base, the sand-shooting plate is arranged on the mobile sand-shooting head, and the lower-pressure sand-shooting device includes a hydraulic pressure A solid cylinder, a compaction head and a compressed air intake pipe, the hydraulic compaction cylinder is installed on the upper beam, the hydraulic compaction cylinder is provided with a compaction head, and the compressed air intake pipe is connected with the hollow piston rod of the hydraulic compaction cylinder, The lower pressure sand injection device, the upper mold opening and closing mechanism, the sand bucket and the automatic sand adding mechanism are all installed on the upper beam, and the lower mold opening and closing mechanism, the iron type conveying mechanism and the iron type upper stop mechanism are all installed on the base. The upper stop mechanism is fixed on the iron type conveying mechanism. 2 . The sand-covered molding machine for double-sided cavity iron molds according to claim 1 , wherein the upper mold opening and closing mechanism comprises an upper template frame and an upper mold lifting cylinder, and the lower mold opening and closing mechanism includes A lower formwork frame and a lower formwork lift cylinder are respectively connected with the upper formwork lift cylinder and the lower formwork lift cylinder, and guide columns are provided on both the upper formwork frame and the lower formwork frame. 3. The sand-covered molding machine for double-sided cavity iron mold according to claim 2, characterized in that: the guide columns on the upper formwork frame and the lower formwork frame are four, the upper formwork frame, the lower formwork frame The guide columns on the formwork frame move up and down synchronously with the upper formwork frame and the lower formwork frame respectively. 4. The sand-covered molding machine for double-sided cavity iron mold according to claim 1, characterized in that: the iron mold conveying mechanism is installed on the roller track on the base; Four blocks are fixed on the roller frame on both sides of the iron conveying mechanism. 5 . The sand-covered molding machine for double-sided cavity iron molds according to claim 1 , wherein the center line of the upper mold opening and closing mechanism and the center line of the lower mold opening and closing mechanism are on the same straight line. 6 . . 6 . The sand-covered molding machine for double-sided cavity iron molds according to claim 1 , wherein the upper mold lifting cylinder and the lower mold lifting cylinder are air cylinders or hydraulic cylinders. 7 . 7. The sand-covered molding machine for double-sided cavity iron molds according to claim 1, characterized in that: the way that the iron molds enter the sand-shooting station from an external conveying roller table is to move horizontally and laterally along the axis of the iron molds. The form is that: the iron mold conveying mechanism enters and exits the mold clamping and molding station and the iron mold axis is perpendicular; the iron mold moves into and out of the sand shooting station and the sand shooting head moves in a 90° arrangement. 8 . The sand-covered molding machine for double-sided cavity iron mold according to claim 1 , wherein the sand-shooting device adopts a device that presses down the sand and fixes the sand-shooting head to prevent the sand-shooting head from moving backward. 9 . . 9 . The sand-covered molding machine for double-sided cavity iron molds according to claim 1 , wherein the moving sand-shooting head moves back and forth, and the moving direction is consistent with the axis of the iron mold. 10 . 10. The sand-covered molding machine for double-sided cavity iron mold according to claim 1, characterized in that: the sand shooting method adopts the vertical side surface of the iron mold to horizontally shoot sand, and move the sand shooting head to shoot the sand plate. The sand shooting holes in the iron mold are arranged horizontally, and the upper and lower cavities of the iron mold are shot and covered with sand at the same time.