CN205763630U - Unloading device - Google Patents

Abstract

The utility model relates to a molding technology for microsphere-coated sand molds, which can be applied to the molding technology of other cast iron and steel castings coated sand molds. The utility model provides a feeding device, including a sand outlet at the lower end of a large hopper. There is a large hopper sealing plate, and the large hopper sealing plate is in two matching positions of aligning with the sand outlet at the lower end of the large hopper to block the falling sand and misaligning to reveal the falling sand. In this way, a feeding device capable of automatic sand supply operation is provided, which saves labor cost and labor intensity, and avoids direct contact between workers and coated sand, which may cause health damage.

Description

Unloading device

technical field

The utility model belongs to the field of film-coated sand mold casting, in particular to a molding technology for film-coated sand molds of microspheres, cast steel and iron castings.

Background technique

At present, the traditional coated sand molding used for the production of small parts such as microspheres, cast steel, and cast iron coated sand molds mainly adopts artificial sand filling; this method needs to first make a coated sand mold for the product cavity ( That is, the core mold), which is an opposed plate-shaped structure, and the semicircular cavity a is densely covered on the side plate surface, and the opposite plates forming the coated sand mold are closed to form multiple spherical cavities. The molten steel runner c used to connect the main sprue b is set between the circular cavities a, as shown in Figure 1-3, and then a single group of coated sand molds after mold closing is embedded in ordinary external sand. During pouring, the molten steel enters the main sprue b, and then flows into each spherical cavity through the molten steel flow channel c in turn. The high precision of its own cavity and the heat preservation and shaping effect of ordinary sand can meet its high-quality requirements for finished products.

The coated sand includes the raw sand that constitutes the main body of the coated sand, and the auxiliary material is thermoplastic phenolic resin as a binder, and an appropriate amount of curing agent, lubricant and other additives are added together. The main function of additives is to improve the performance of coated sand. At present, the widely used additives mainly include high temperature resistant additives, easy-to-collapse additives, strengthening and toughening additives, anti-sticking sand additives and wet additives.

In the process of preparing coated sand molds, manual sand distribution is used in the prior art, that is, the operator uses a scoop to hold the coated sand raw materials, pours them onto the master mold (that is, the steel mold for preparing coated sand molds), and uses a scraper to Similar to a bricklayer using a mud trowel to smooth the coated sand on the steel mold, cover it with a cover and heat it to solidify, then step on the pedal of the jacking mechanism to lift the coated sand mold, and then remove the coated sand mold. Manual operation has the following technical defects: in the sanding and smoothing process, the amount of sand is difficult to control, and it is received with a scoop while smoothing. At this time, the raw sand will inevitably contact the skin of the employees to cause pollution, and some of it will be scattered on the ground. On the ground, it not only increases the workload, but also causes the waste of raw material sand, because the raw material sand on the ground may be mixed with impurities, and its quality cannot be guaranteed; when heating and curing, personnel need to stand at the working position, and the auxiliary materials are directly damaged by the smoke generated by heating. Workers; taking off the coated sand mold after curing and forming is easy to burn the workers, and the contact with the high-temperature coated sand mold will seriously affect the skin health of the workers, ranging from skin allergies to severe skin diseases and causing them to be unable to continue working; Among them, the outer surface of the coated sand mold is difficult to ensure smoothness, and surface warping often occurs. When the coated sand mold is stacked and clamped with other coated sand molds, the surface of the coated sand mold is cracked, and whether the middle part of the surface is cracked. Unobservable until the waste is poured out.

Contents of the invention

The purpose of the utility model is to provide a feeding device, which can implement automatic sand supply operation.

In order to achieve the above object, the utility model adopts the following technical scheme, a feeding device, which is characterized in that: the sand outlet at the lower end of the large hopper is provided with a large hopper sealing plate, and the large hopper sealing plate is respectively located at the lower end of the large hopper. The sand outlet is aligned to block the shakeout and dislocated to reveal the two matching positions of the shakeout.

The raw material sand is stored in the large hopper. The sand outlet at the lower end of the large hopper is provided with a large hopper sealing plate. The sealing plate of the large hopper is at the same position as the sand outlet at the lower end of the large hopper. The lower end of the sand outlet or open the sand supply, or be blocked to stop sand falling. In this way, there is no need to manually use tools such as scoops to scoop the cloth one by one, which greatly saves labor costs and labor intensity; it also avoids direct contact between workers and coated sand, and avoids health damage to workers.

Description of drawings

Fig. 1 is a schematic view of the frontal cavity structure of the film-coated sand mold upper plate of the present utility model;

Fig. 2 is a partially enlarged view of part I of Fig. 1;

Fig. 3 is a schematic diagram of the opposed superposition state of the film-coated sand mold of the present invention;

4 and 5 are structural representations of the utility model.

detailed description

Referring to Figures 4 and 5, the unloading device includes a large hopper 10, the sand outlet at the lower end of the large hopper 10 is provided with a large hopper sealing plate 20, and the large hopper sealing plates 20 are respectively positioned to block the sand outlet at the lower end of the large hopper 10. Shakeout and dislocation reveal two kinds of matching position states of shakeout.

The plate surface of the large hopper sealing plate 20 is located in the horizontal plane, and the large hopper sealing plate 20 is connected with the horizontal moving mechanism, and the horizontal moving mechanism drives the large hopper sealing plate 20 to move to align with the sand outlet at the lower end of the large hopper 10 to seal off. location of the sand.

The device also includes a small hopper 40, the small hopper 40 is connected with the driving mechanism, and the driving mechanism drives the sand connection port 41 at the upper end of the small hopper 40 to move to the position where the sand outlet is aligned with the sand outlet at the lower end of the large hopper 10, and the horizontal movement mechanism The return spring 31 is included, and under the elastic force provided by the return spring 31 , the front edge of the sealing plate 20 of the large hopper closely fits with the rear edge of the sand connection port 41 at the upper end of the small hopper 40 .

In order to clearly understand the positional relationship between the front and rear sides or the front and rear directions, the front side in this specification refers to the side or orientation that points to or faces the master mold 1 .

The above-mentioned large hopper 10 and small hopper 40 cooperate with each other to realize automatic feeding, that is, the driving mechanism drives the sand-connecting port 41 at the upper end of the small hopper 40 to move to the sand-filling and falling-out position aligned with the sand outlet at the lower end of the large hopper 10. , the return spring 31 is compressed, and the large hopper sealing plate 20 is pushed by the small hopper 40 to a position staggered from the sand outlet at the lower end of the large hopper 10. At this time, the raw material coated sand in the large hopper 10 will fall into the small hopper 40 , the small hopper 40 and the large hopper 10 are in a docking shape, and the raw material coated sand in the small hopper 40 is filled, as shown in Figure 4; The overlapping portion of the docking port of 10 is gradually reduced. During this process, the return spring 31 pushes the front side edge of the large hopper sealing plate 20 to stick close to the small hopper 40 and extend to the sand outlet at the lower end of the large hopper 10. With the small hopper 40 and The complete separation of the docking port of the large hopper 10, as shown in Figure 5, the large hopper sealing plate 20 completely blocks the sand outlet at the lower end of the large hopper 10 to avoid continuous blanking, and the small hopper 40 spreads coated sand to the master mold 1 . In this process, the material receiving of the small hopper 40 is completed, and the leakage phenomenon of the coated sand is avoided again, without any shedding phenomenon.

The front side edge of the large hopper sealing plate 20 extends downwards to be provided with a baffle plate 21, the front side plate surface of the baffle plate 21 is arranged in parallel with the rear side plate surface of the small hopper 40, and the rear side plate surface of the baffle plate 21 is in line with the position-limiting guide. One end of the rod 32 is connected, and the rod body of the limit guide rod 32 and the guide rail 33 form a limit guiding linear movement cooperation, and the return spring 31 is sleeved between the rear side surface of the limit guide rod 32 and the guide rail 33 at the baffle plate 21 between the shafts. The front side plate surface of the baffle plate 21 and the rear side plate surface of the small hopper 40 are arranged parallel to each other and the plate surfaces are located in the vertical direction, which can provide a suitable thrust and avoid the scattering of the raw material coated sand.

The sand outlet at the lower end of the large hopper 10 includes a discharge inner nozzle 11 extending directly downwards from the large hopper 10, and an outer discharge nozzle 12 is set outside the discharge inner nozzle 11. The inner nozzle 11 of the material forms an up-and-down adjustable fit and a locking unit 13 is arranged between the two. The locking unit 13 can be realized by parts such as screws. Cooperating, the end of the screw leans against the outer wall of the discharge inner nozzle 11 to realize the relative fixing of the discharge inner nozzle 11 and the discharge outer nozzle 12 .

Adopting the up and down adjustment matching structure, it is convenient to adjust the fit between the lower nozzle 12 of the discharge outer nozzle 12 and the sand connection port 41 on the upper end of the small hopper 40, so as to avoid interference during the moving process and ensure a good fit Avoid falling sand phenomenon. Because it is difficult to process the box parts such as the large hopper 10 to an appropriate accuracy, and an independently adjustable discharge outer nozzle 12 can smoothly solve the assembly accuracy between the parts.

The rear pipe wall of the discharge outer nozzle 12 is connected with the upper end of the vertical rod 14 , and the lower end of the vertical rod 14 is connected with the connecting guide rail 33 . The preferred solution is that the rear pipe wall of the discharge outer nozzle 12 is adjustable and connected with the vertical rod 14 or the guide rail 33 of the vertical rod 14, which can not only ensure the assembly of the parts, but also reduce the difficulty of processing.

The locking unit 13 is arranged on the opposite side of the discharge outer nozzle 12 .

The rear side of the lower port of the discharge outer nozzle 12 is arranged with a stopper 15 in sequence. When the large hopper sealing plate 20 and the stopper 15 are in contact, the large hopper sealing plate 20 completely seals the lower part of the discharge outer nozzle 12. port. The large hopper sealing plate 20 and the stopper 15 form a limited cooperation with each other, mainly to ensure that the large hopper sealing plate 20 is just in the blocking position under the action of the return spring 31 .

The setting scheme of the above-mentioned locking unit 13, the connection scheme between the rear side pipe wall of the discharge outer nozzle 12 and the vertical bar 14 or the vertical bar 14 and the guide rail 33 is beneficial to ensure that the large hopper sealing plate 20 and the discharge outer tube Between the lower ports of the mouth 12, the lower port of the discharge outer nozzle 12 and the small hopper 40, avoid sand leakage gaps. During the specific connection, the large hopper sealing plate 20, the discharge outer nozzle 12, the vertical rod 14 and the guide rail 33 can be assembled; then, the lower port of the discharge outer nozzle 12 is flush with the small hopper 40 The relative positions of the inner and outer nozzles 11,12 of the discharge are then fixed.

Claims (8)

1. A blanking device, characterized in that: the sand outlet at the lower end of the large hopper (10) is provided with a large hopper sealing plate (20), and the large hopper sealing plate (20) is respectively located at the lower end of the large hopper (10) The sand outlet is aligned to block the shakeout and dislocated to reveal the two matching positions of the shakeout. 2. The blanking device according to claim 1, characterized in that: the plate surface of the large hopper sealing plate (20) is located in the horizontal plane, the large hopper sealing plate (20) is connected with the horizontal movement mechanism, and the horizontal movement mechanism Drive the large hopper sealing plate (20) to move to the position where the sand outlet at the lower end of the large hopper (10) is aligned to block the falling sand. 3. The unloading device according to claim 1 or 2, characterized in that: the device also includes a small hopper (40), the small hopper (40) is connected with a driving mechanism, and the driving mechanism drives the sand-connecting material at the upper end of the small hopper (40). The mouth (41) is moved to the place where it is aligned with the sand outlet at the lower end of the large hopper (10). The horizontal movement mechanism includes a return spring (31), and the large hopper is sealed under the elastic force provided by the return spring (31). The front edge of the plate (20) closely fits with the rear edge of the sand joint (41) on the upper end of the small hopper (40). 4. The unloading device according to claim 3, characterized in that: a baffle (21) extends downward from the front edge of the sealing plate (20) of the large hopper, and the front side of the baffle (21) is in contact with the The rear side panels of the small hopper (40) are arranged in parallel, the rear side panels of the baffle plate (21) are connected to one end of the limit guide rod (32), and the shaft of the limit guide rod (32) is connected to the guide rail (33) Constituting the space-limiting guiding linear movement fit, the back-moving spring (31) is sleeved on the shaft between the rear side plate surface of the baffle plate (21) and the guide rail (33) of the space-limiting guide rod (32). 5. The unloading device according to claim 3, characterized in that: the sand outlet at the lower end of the large hopper (10) includes a discharge inner nozzle (11) directly extending downward from the large hopper (10), and the discharge The inner nozzle (11) is covered with an outer discharge nozzle (12), and the outer discharge nozzle (12) and the inner discharge nozzle (11) form a vertically adjustable fit and a locking unit is arranged between the two (13). 6. The blanking device according to claim 5, characterized in that: the rear pipe wall of the discharge outer nozzle (12) is connected to the upper end of the vertical rod (14), and the lower end of the vertical rod (14) is connected to the guide rail ( 33) Connected. 7. The unloading device according to claim 5, characterized in that: the locking unit (13) is arranged on the opposite side of the discharge outer nozzle (12). 8. The unloading device according to claim 6, characterized in that: a stopper (15) is arranged along the rear side of the lower port of the outer discharge nozzle (12), and the large hopper sealing plate (20) is connected with the The large hopper sealing plate (20) completely blocks the lower port of the discharge outer nozzle (12) when the stopper (15) is against, and the rear pipe wall of the discharge outer nozzle (12) and the vertical rod (14) Or vertical bar (14) guide rail (33) is adjustable connection.