CN107321933A - High efficiency levels parting removable flask molding machine and its formative method - Google Patents

Abstract

The invention relates to a high-efficiency horizontal splitting molding machine and a molding method thereof. A lower sand box module is arranged on the frame, and the lower sand box module includes a lower enclosure frame. A lower push plate is slidingly arranged in the lower enclosure frame, and the lower enclosure frame is connected There is a first driving device, the lower push plate is connected with the second driving device; it also includes an upper sand box module, the upper sand box module includes an upper frame fixed on the frame, and an upper push plate slides inside the upper frame. The push plate is connected with a third driving device; it also includes a sandblasting nozzle seat fixedly connected with the upper surrounding frame, the sandblasting nozzle seat is connected with a pressure sandblasting system, and the upper surrounding frame and the lower surrounding frame are respectively provided with pressure blasting system. The sand inlet channel; the lower surface of the upper push plate and the upper surface of the lower push plate are equipped with airbags; the surface of the airbags is equipped with pressure sensors; the upper and lower enclosures are respectively provided with limit switches. The impact of the gas in the sand box on sand blasting and compaction is avoided, the compaction uniformity of the molding sand is high, and the size, shape and precision of the casting after pouring are well guaranteed.

Description

High-efficiency horizontal parting out-of-box molding machine and its molding method

technical field

The invention relates to a sand molding machine for casting, in particular to a high-efficiency horizontal split-out box molding machine and a molding method thereof.

Background technique

Sand casting is a casting method that produces castings in sand molds, and is widely used in the production of castings of steel, iron and most alloys. The main function of the equipment used to make sand molds is to fill the loose sand into the sand box, and compact the sand in the sand box by compaction, so that the sand has the necessary strength during transportation or casting.

The horizontal split type out-of-box molding machine does not require a large number of sand boxes and many auxiliary machines, and has strong process adaptability and low investment. As a kind of molding equipment used to produce medium and small castings, the horizontal split molding machine has been widely used in our country. However, at present, the horizontal parting out-of-box molding machines used by foundry production enterprises in my country generally use "gravity" or "sand shot filling" molding sand for their forming technology, and then use the pressure plate in the sand box to form the mold from the back of the sand mold to the template (model) The compaction is formed by applying pressure in the surface direction, and the compactness distribution decreases from the back of the molding sand to the parting surface. This pressurization method is only when the sand mold is relatively low, the compactness of each part of the sand mold is relatively uniform, and when the sand mold is relatively high or the height difference of the model itself is large, the amount of compression of the sand when the "pressing plate" is compressed Under the same circumstances, the distribution of compactness in the cavity will be uneven, and the compactness in the cavity with different parting surfaces and deep concavities after sand molding is quite different, and the size, shape and accuracy of the casting after pouring are difficult to guarantee. .

Contents of the invention

The technical problem to be solved by the present invention is to provide a high-efficiency horizontal splitting and unboxing molding machine with uniform compaction and good compaction effect.

In order to solve the above-mentioned technical problems, the technical solution of the present invention is: a high-efficiency horizontal splitting and unboxing molding machine, including a frame, and the frame is provided with a lower sand box module, and the lower sand box module includes a lower surrounding frame. A lower push plate is slidably arranged in the lower surrounding frame, the lower surrounding frame is connected with a first drive device for driving it to move up and down, and the lower push plate is connected with a second drive device for driving it to move up and down; it also includes an upper sand A box module, the upper sand box module includes an upper frame fixed on the frame, and an upper push plate is slid inside the upper frame, and the upper push plate is connected with a third drive that pushes it to move up and down device; also includes a sandblasting nozzle seat fixedly connected with the upper surrounding frame, the sandblasting nozzle seat is connected with a pressure sandblasting system, the upper surrounding frame and the lower surrounding frame are respectively provided with the pressure spraying nozzle The sand inlet channel connected to the sand system; the lower surface of the upper push plate and the upper surface of the lower push plate are provided with a fitting air bag; the fitting air bag is away from the upper push plate or the lower push plate A pressure sensor is arranged on the surface; limit switches are respectively arranged in the upper surrounding frame and the lower surrounding frame.

As a preferred technical solution, it also includes a split template module, the split template module includes a sand transfer table located in the middle of the frame, a split template seat is provided on the sand transfer table, and a split template seat is provided on the split template seat. Template, the sandblasting nozzle seat is located on the left or right side of the sub-formwork, the front and rear ends of the sub-formwork towards the bottom of the sub-formwork seat are respectively provided with several positioning holes, and the sub-formwork seat is provided with There are positioning pins matched with the positioning holes; the split template seat is connected with a fourth driving device that drives it to move horizontally; the split template seat and the sand mold transfer table are provided with the lower surrounding frame to pass through through holes.

As a preferred technical solution, the fourth driving device includes a motor fixed on the sand mold transfer table, two nut sleeves are arranged on the screw connected to the output shaft of the motor, and the split template seat is fixed on the two Put the nut on.

As a preferred technical solution, the first driving device, the second driving device and the third driving device are all hydraulic cylinder assemblies.

As a preferred technical solution, an annular material guide chamber is provided in the sandblasting nozzle seat, and several sandblasting nozzles are arranged on the side of the material guide chamber facing the upper surrounding frame, and the upper surrounding frame and the The sand inlet channel corresponding to the sandblasting nozzle is provided on the lower surrounding frame.

As a preferred technical solution, the upper surrounding frame and the lower surrounding frame both include four main boards, and a transition connecting plate is provided at the junction of two adjacent main boards, and the transition connecting plate is an arc-shaped plate or opposite to the A sloping plate on which the main board is inclined.

High-efficiency horizontal parting and unboxing molding machine, the setting of the airbag ensures that there is no gas between the template and the push plate before sandblasting, and avoids the influence of gas on the sandblasting uniformity and compaction during the sandblasting process; due to the sandblasting process The molding sand between the middle push plate and the template is always under high pressure, and the compaction is uniform. The overall compaction uniformity of the sand mold is high and the molding effect is good.

Another technical problem to be solved by the present invention is to provide a molding method for a high-efficiency horizontal split-out molding machine.

The molding method of the high-efficiency horizontal splitting molding machine, including the PLC control system, the PLC control system receives the information of the pressure sensor and the limit switch and controls the pressure sand blasting system, the first driving device, the second driving device, and the third driving device and the operation of the fourth driving means;

Mold clamping: the first driving device drives the lower frame to go up. During the upward movement of the lower frame, the sub-formwork needs to be placed on the upper side of the lower frame. When the upper surface of the sub-formwork contacts the upper frame, the first drive device stops running; The second driving device drives the lower push plate to go up, and the fitting airbag of the lower push plate is inflated and fully attached to the lower mold; the third driving device drives the upper push plate to go down and the fitting airbag is inflated, and the inflated fitting airbag is inflated with the upper mold fit perfectly;

Sandblasting: The pressure sandblasting system works and blasts sand between the fitting airbag and the upper mold of the push plate upward through the sand inlet channel and between the fitting airbag and the lower mold of the lower push plate; during the whole sandblasting process, the second drive The device and the third driving device always give a constant pressure to the upper push plate and the lower push plate and the pressure is less than the sand blasting pressure to ensure normal sand blasting; the PLC control system controls the second drive device and the third drive through the pressure information fed back by the pressure sensor. The driving device makes the upper push plate and the lower push plate move up and down; when the molding sand filling in the upper and lower surrounds reaches the limited amount, the upper push plate and the lower push plate will open the limit switch, and the limit switch will push the upper push plate The information that the push plate reaches the limited position is fed back to the PLC control system, and the PLC control system controls the sandblasting unit to stop sandblasting; at the same time, the PLC control system controls the airbag to be fitted to exhaust;

Demoulding: The lower frame and the lower push plate move downward together to drive the sub-formwork and the lower sand mold downward to separate from the upper sand mold. After the lower sand mold and the sub-formwork reach the predetermined position, the sub-formwork is removed; then the first drive device and the second drive The device drives the lower sand mold to go up and the upper sand mold to be combined;

Unboxing: the first driving device, the second driving device and the third driving device move down synchronously, the lower surrounding frame and the lower push plate drive the lower sand mold to move down, and the upper pushing plate pushes the upper sand mold out of the upper surrounding frame. After being separated from the upper frame, the lower frame moves downward driven by the first driving device. At this time, the lower push plate and the upper push plate are kept stationary until the lower sand mold is separated from the lower frame. After the lower sand mold is separated from the lower frame, the upper The push plate is separated from the upper sand mold;

After the sand mold is out of the box, the sand mold can be transferred manually or by mechanical device; the molding machine can make the next sand mold.

As a preferred technical solution, the airbag is exhausted before the sandblasting is completed, and after the sandblasting is completed, the upper push plate is driven downward by the third drive device to keep pressure, and the lower push plate is driven by the second drive device. Driven by the upward pressure maintenance.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the structural representation of the embodiment of the present invention;

Fig. 2 is a schematic structural view of the upper or lower surrounding frame in the embodiment of the present invention.

In the figure: 1-frame; 2-second driving device; 3-first driving device; 4-lower frame; 5-upper frame; 6-third driving device; 7-upper push plate; 8-spray Sand nozzle seat; 9-fit airbag; 10-upper mold; 11-sub-formwork; 12-screw; 13-motor; 14-sub-template seat; 15-nut sleeve; 16-lower mold; 18-main board; 19-transition connecting plate; 20-sand transfer table.

detailed description

As shown in Fig. 1 and Fig. 2, the high-efficiency horizontal parting and unboxing molding machine includes a frame 1, and the frame 1 is provided with a lower sand box module, and the lower sand box module includes a lower surrounding frame 4. A lower push plate 17 is slidably arranged in the lower surrounding frame 4, and the lower surrounding frame 4 is connected with a first driving device 3 that drives it to move up and down; The second drive unit 2 for movement. The frame 1 is provided with an upper sand box module positioned on the upper side of the lower sand box module, and the upper sand box module includes an upper enclosure frame 5 fixed on the frame 1, and the upper enclosure frame 5 An upper push plate 7 is slidably provided, and the upper push plate 7 is connected with a third driving device 6 for pushing it to move up and down. It also includes a sandblasting nozzle base 8 fixedly connected to the upper surrounding frame 5, the sandblasting nozzle base 8 is connected with a pressure blasting system, the upper surrounding frame 5 and the lower surrounding frame 4 are respectively provided with the The sand inlet channel connected to the above-mentioned pressure sandblasting system. Both the lower surface of the upper push plate 7 and the upper surface of the lower push plate 17 are provided with an adhesive airbag 9 . A pressure sensor is provided on the surface of the attached airbag 9 facing away from the upper push plate 7 or the lower push plate 17 ; limit switches are respectively provided in the upper surrounding frame 5 and the lower surrounding frame 4 .

It also includes a split template module, the split template module includes a sand transfer table 20 located in the middle of the frame 1, the sand transfer table 20 is provided with a split template seat 14, and the split template seat 14 is provided with a split template 11. The sandblasting nozzle seat 8 is located on the left or right side of the split template 11, and the split template 11 is respectively provided with several positioning holes at the front and rear ends of the bottom surface of the split template seat 14, and the split template 11 is provided with several positioning holes. The template seat 14 is provided with a positioning pin that matches the positioning hole; when the lower surrounding frame 4 pushes the sub-template 11 upwards, the sub-template 11 goes up together with the lower surrounding frame 4; Realize parting on the back part template seat 14. The split template base is connected with a fourth driving device that drives it to move horizontally; the split template base and the sand mold transfer table are provided with through holes for the lower surrounding frame to pass through. An upper mold 10 is provided on the upper side of the sub-formwork 11 , and a lower mold 16 is provided on the lower side of the sub-template 11 . The split template seat 14 is connected with a fourth driving device that drives it to move horizontally, and the fourth driving device includes a motor 13 fixed on the sand mold transfer table 20, and the output shaft of the motor 13 is connected to the screw rod 12 Two nut sleeves 15 are provided, on which the split template seat 14 is fixed. A through hole for the lower frame 4 to pass through is provided on the sub-formwork base 14 and the sand transfer table 20 .

Further, the first driving device 3 , the second driving device 2 and the third driving device 6 are hydraulic cylinder assemblies.

The sandblasting nozzle seat 8 is provided with an annular material guide cavity, and several sandblasting nozzles are arranged on the side of the material guide cavity facing the upper surrounding frame 5, and the upper surrounding frame 5 and the lower surrounding frame 4 is provided with the sand inlet channel corresponding to the sandblasting nozzle.

As shown in Figure 2, in order to facilitate demoulding, the upper surrounding frame 5 and the lower surrounding frame 4 each include four main boards 18, and a transition connecting plate 19 is provided at the junction of two adjacent main boards 18, the The transition connecting plate 19 is an arc plate or a slanting plate inclined relative to the main plate 18 .

The molding method of the above-mentioned high-efficiency horizontal splitting molding machine includes a PLC control system. The PLC control system receives information from pressure sensors and limit switches and controls the pressure sandblasting system, the first driving device 3, the second driving device 2, the second driving device Operation of the third driving device 6 and the fourth driving device;

Mold closing: the first driving device 3 drives the lower frame 4 to go upward, and the sub-formwork 11 needs to be placed on the upper side of the lower frame 4 during the upward movement of the lower frame 4. When the upper surface of the sub-formwork 11 contacts the upper frame 5, The first driving device 3 stops running; the second driving device 2 drives the lower push plate 17 to move upward, and the fitting air bag 9 of the lower push plate 17 is inflated and fully attached to the lower mold 16; the third driving device 2 drives the upper push plate 17 to move downward And fitting airbag 9 is inflated, and the fitting airbag 9 after inflation is fully fitted with upper mold 10; Discharge passage is set on the sub-formwork 11, and exhaust passage is opened during mold closing, and fitting airbag 9 can be connected with upper mold due to its elasticity. 10 or the lower mold 16 are fully fitted and there is no gas between the two, and the exhaust passage needs to be closed before sandblasting.

Sandblasting: The pressure sandblasting system works and pushes up the sandblasting between the fitting airbag 9 and the upper mold 10 of the plate 7 and between the fitting airbag 9 and the lower mold 16 of the lower push plate 17 through the sand inlet channel; the whole sandblasting During the process, the second driving device 2 and the third driving device 6 always give the upper push plate 7 and the lower push plate 17 a certain holding pressure and the holding pressure is lower than the sandblasting pressure to ensure the normal sandblasting of the pressure sandblasting system. The PLC control system controls the second driving device 2 and the third driving device 6 through the pressure information fed back by the pressure sensor, so that the upper push plate 7 and the lower push plate 17 move up and down respectively under the condition of giving the molding sand a stable holding pressure, which is for the molding sand. Enter the provided space; when the filling of molding sand reaches the demand, the lower push plate 17 and the upper push plate 7 touch the limit switch, and the limit switch will feed back the information that the upper push plate 7 and the lower push plate 17 have reached the limited position to the PLC control system, The PLC control system controls the sandblasting unit to stop sandblasting; during the sandblasting process, the PLC control system is required to control the exhaust of the bonding air bag 9 to achieve smooth sand surface; preferably, the bonding chamber 9 can be arranged before the sandblasting is completed. Gas, after the sandblasting finishes, the upper push pedal 7 and the lower push pedal 17 hold the pressure for a period of time for the molding sand again.

Demoulding: the lower frame 4 and the lower push plate 17 move downward together and simultaneously drive the sub-formwork 11 to go down and separate from the upper sand mold. After the lower sand box module reaches the predetermined position, the sub-formwork 11 is removed manually or by mechanical means; then the first drive The device 3 and the second driving device 1 drive the lower sand mold to go up and the upper sand mold to be combined;

Unboxing: the first driving device 3, the second driving device 2 and the third driving device 6 operate simultaneously, the lower enclosure frame 4 and the lower push plate 17 drive the lower sand mold to move down, and the upper push plate 7 pushes the upper sand mold out of the upper enclosure frame 5 , until the upper sand mold is completely separated from the upper surrounding frame 5; then, the lower surrounding frame 4 is driven downward by the first driving device 3, and at this time, the lower push plate 17 is kept stationary until the lower sand mold is separated from the lower surrounding frame 4;

After the sand mold is out of the box, the sand mold can be transferred manually or by mechanical device; the molding machine can make the next sand mold.

The high-efficiency horizontal splitting molding machine effectively avoids the influence of the gas in the upper and lower enclosures on sandblasting and compaction during the molding process, and avoids the generation of air bubbles; because the molding sand is always under high pressure during the entire sandblasting process, It is equivalent to layer by layer compaction and refilling, with high compaction uniformity of molding sand, high molding rate, and avoiding sand mold cracks during unboxing or casting. After the sand mold is formed, the parting surface and the cavity with different deep concaves have high consistency, and the size, shape and precision of the casting after pouring are well guaranteed.

The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments, and what described in the above-mentioned embodiments and the description only illustrates the principles of the present invention, and the present invention will also have other functions without departing from the spirit and scope of the present invention. Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. high efficiency levels parting removable flask molding machine, it is characterised in that：Including frame, the frame is provided with drag box module, institute Stating drag box module includes lower enclosure frame, and interior slide of the lower enclosure frame is provided with lower push pedal, and the lower enclosure frame is connected with driving thereon The first driving means of lower movement, the lower push pedal is connected with the second drive device for driving it to move up and down；Also include upper sand Tank module, the cope module, which includes sliding in the upper enclosure frame being fixed in the frame, the upper enclosure frame, is provided with upper push pedal, The upper push pedal is connected with the 3rd drive device for promoting it to move up and down；Also include the sandblasting being fixedly connected with the upper enclosure frame Mouth seat, the blast nozzle seat is connected with pressure sand blasting system, and the upper enclosure frame and the lower enclosure frame are respectively equipped with and the pressure The sand filling passageway of sand blasting system connection；The upper surface of the lower surface of the upper push pedal and the lower push pedal is equipped with laminating air bag； The laminating air bag is provided with pressure sensor away from the surface of the upper push pedal or the lower push pedal；The upper enclosure frame and it is described under Limit switch is respectively equipped with peripheral frame.

2. high efficiency levels parting removable flask molding machine as claimed in claim 1, it is characterised in that：Also include a point formwork module, institute Stating point formwork module includes the sand mold transfer station positioned at the central rack, and the sand mold transfer station is provided with a point dies holder, institute Point dies holder is stated provided with point template, the blast nozzle seat is located at the left side or right side of described point of template, described point of template direction The rear and front end of the bottom surface of described point of dies holder is respectively equipped with several positioning holes, and described point of dies holder is provided with and the positioning hole The alignment pin of cooperation；Described point of dies holder is connected with the four-drive device for driving it to move horizontally；Described point of dies holder and institute State sand mold transfer station and be provided with the through hole passed through for the lower enclosure frame.

3. high efficiency levels parting removable flask molding machine as claimed in claim 2, it is characterised in that：The four-drive device includes The motor in the sand mold transfer station is fixed on, the screw rod of the output shaft connection of the motor is provided with two nut sleeves, described point Dies holder is fixed on described in two in nut sleeve.

4. high efficiency levels parting removable flask molding machine as claimed any one in claims 1 to 3, it is characterised in that：Described first Drive device, second drive device and the 3rd drive device are hydraulic pressure cylinder assembly.

5. high efficiency levels parting removable flask molding machine as claimed in claim 1, it is characterised in that：Ring is provided with the blast nozzle seat The guide chamber of shape, the guide chamber towards the side of the upper enclosure frame be provided with several blast nozzles, the upper enclosure frame and it is described under Peripheral frame is provided with the sand filling passageway corresponding with the blast nozzle.

6. high efficiency levels parting removable flask molding machine as claimed in claim 1, it is characterised in that：The upper enclosure frame and it is described under enclose Frame includes four pieces of mainboards, and the joining place of mainboard described in adjacent two is provided with transition connecting plate, and the transition connecting plate is arc Or the relatively described inclined swash plate of mainboard.

7. the formative method of high efficiency levels parting removable flask molding machine, it is characterised in that：Including PLC control system, PLC control system Receive the information and control pressure sand blasting system of pressure sensor and limit switch, first driving means, the second drive device, the The operation of three drive devices and four-drive device；

Matched moulds：First driving means drive lower enclosure frame up, need point template being placed in the upper of lower enclosure frame during lower enclosure frame is up Side, when the upper surface of point template, that then first driving means are contacted with upper enclosure frame is out of service；Second drive device drives lower push pedal It is up, the laminating airbag aeration of lower push pedal and fitted completely with lower mould；3rd drive device drives upper push pedal descending and laminating gas Capsule is inflated, and the laminating air bag after inflation is fitted completely with upper mould；

Sandblasting：Pressure sand blasting system work and pass through the upward push pedal of sand filling passageway laminating air bag and upper mould between and lower push pedal Laminating air bag and lower mould between sandblasting；In whole sandblasting procedures, the second drive device and the 3rd drive device are given all the time Push pedal and the constant pressure of lower push pedal and the pressure are less than blasting pressure, it is ensured that normal sandblasting；PLC control system is passed by pressure The pressure information of sensor feedback controls the second drive device and the 3rd drive device so that upper push pedal and lower push pedal are moved up and down； When the molding sand filling in upper enclosure frame and lower enclosure frame reaches limited amount, limit switch is opened in upper push pedal and lower push pedal, spacing to open Close and upper push pedal and lower push pedal are reached into the feedback of the information of defined position to PLC control system, PLC control system control abrasion blasting unit Stop sandblasting；Meanwhile, PLC control system control laminating air bags；

The demoulding：Lower enclosure frame and lower push pedal are common descending while drive point template and lower sand mold is descending is separated with upper sand mold, instantly sand Type and point template are reached behind precalculated position, and a point template is removed；Then first driving means and the second drive device drive lower sand Type is up with upper sand mold mould assembling；

Drawing：First driving means, the second drive device and the 3rd drive device are simultaneously synchronous to be moved down, lower enclosure frame and lower push pedal band Dynamic lower sand mold is moved down, and upper sand mold is released upper enclosure frame by upper push pedal, and after upper sand mold is separated with upper enclosure frame completely, lower enclosure frame is first It is descending under the drive of drive device, now keep lower push pedal and upper push pedal is motionless until lower sand mold is separated with lower enclosure frame, instantly sand Above push pedal is up after type is separated with lower enclosure frame separates with upper sand mold；

Sand mold is completed after drawing, sand mold can be shifted manually or using mechanical device；Moulding machine carries out the making of next sand mold.

8. the formative method of high efficiency levels parting removable flask molding machine as claimed in claim 7, it is characterised in that：The laminating gas Push pedal descending pressurize under the driving of the 3rd drive device on capsule is described after the front exhaust and sandblasting that sandblasting terminates terminate, it is described Lower push pedal up pressurize under the driving of the second drive device.