CN204220964U - A kind of horizontal type cold-chamber die casting feeding system - Google Patents

Abstract

The utility model discloses a kind of horizontal type cold-chamber die casting feeding system, comprise barrel, be provided with plunger in described barrel, the tail end of described plunger is connected with driving mechanism, the sidewall of described barrel is provided with molten metal passage, and described molten metal passage is indoor to Metal Melting by pipeline communication; Described plunger comprises spaced first sealing and the second sealing vertically, die cavity between the inwall of the first sealing, barrel and the discharging opening of barrel forms the balancing gate pit for storing molten metal bath to be shot material, die cavity between the inwall of the first sealing, the second sealing and barrel forms pressure-less chamber, described molten metal passage is suitable for being communicated with described balancing gate pit when described plunger is positioned at initial position, and be suitable for described plunger carry out shooting material or homing action time be communicated with described pressure-less chamber.Horizontal type cold-chamber die casting feeding system of the present utility model is convenient to the amount controlling the molten metal bath injected in barrel, shortens injection time, improves die casting efficiency.

Description

A kind of horizontal type cold-chamber die casting feeding system

Technical field

The utility model relates to a kind of horizontal type cold-chamber die casting feeding system, belongs to die casting equipment feeding technology field.

Background technology

Die casting is that a kind of fused solution of alloy is injected barrel, is then mapped in die cavity by the plunger be arranged in barrel by a certain amount of alloy molten hydraulic pressure, forms foundry goods after cooling forming.

Barrel in tradition die casting equipment can only to be annotated a certain amount of molten metal bath according to the size of foundry goods, and after shooting material, plunger return to initial position, and again adds quantitative molten metal bath and carries out die casting next time in barrel.Because molten metal liquid temperature is higher, to operator, there is larger danger, molten metal bath joins in the pressure chamber of barrel by the general instruments such as scoop that all adopt, and the amount of the molten metal bath that scoop absorbs from Metal Melting room (crucible) differs greatly at every turn, materials are easily caused to waste, and need to expend more injection time in employing scoop interpolation molten metal bath to barrel, and then greatly reduce casting efficiency.

Utility model content

For this reason, the barrel that technical problem to be solved in the utility model is to overcome existing cold chamber die casting device can only inject the molten metal bath of single-piece foundry goods at every turn, shot is wayward, materials are easily caused to waste, and the drawback that the die casting cycle is long, production efficiency is low, thus provide a kind of novel horizontal type cold-chamber die casting feeding system.

For solving the problems of the technologies described above, the utility model by the following technical solutions:

A kind of horizontal type cold-chamber die casting feeding system, it is characterized in that: comprise barrel, the plunger for the molten metal bath injection in barrel being entered in mold cavity is provided with in described barrel, the tail end of described plunger is connected with driving mechanism, the sidewall of described barrel is provided with the molten metal passage for injecting molten metal bath for described barrel, and described molten metal passage is indoor to Metal Melting by pipeline communication, described plunger comprise along its axially spaced-apart arrange for shooting material time the first sealing of sealing and the second sealing for preventing the molten metal bath in described barrel from revealing backward, described first sealing, die cavity between the inwall of described barrel and the discharging opening of described barrel forms the balancing gate pit for storing molten metal bath to be shot material, described first sealing, die cavity between the inwall of described second sealing and described barrel forms pressure-less chamber, described molten metal passage is suitable for being communicated with described balancing gate pit when described plunger is positioned at initial position, and be suitable for described plunger carry out shooting material or homing action time be communicated with described pressure-less chamber.

Described molten metal passage comprises the vertical passageway that the radial direction along described barrel is arranged and the interconnection arranged along the axis of described barrel, described interconnection is arranged in the body of described barrel, one end of described interconnection is communicated with described vertical passageway, the other end of described interconnection extends on the end face of close described driving mechanism side of described barrel, and is connected with described seal for pipe joints.

Described interconnection extends to the outside of described barrel from the inner chamber of described barrel, and one end be positioned at outside described barrel of described interconnection is sealed by sealing-plug.

Described barrel comprises flat part, and be arranged on the gooseneck portion of described flat part discharging one end, the inner chamber in described gooseneck portion tilts obliquely and is communicated with described mold cavity, the inner chamber upper wall of described flat part is connected by the rake transition being arranged on described flat part end with the inner chamber upper wall in described gooseneck portion, the minimum point of described rake is lower than the minimum point of the discharging opening in described gooseneck portion, and the liquid level of the molten metal bath of described Metal Melting indoor is between the peak and the minimum point of described discharging opening of described flat part inner chamber.

Described plunger comprises the stopper head and the second stopper head that are arranged on and coordinate in described flat part inner chamber and with the inwall slipper seal of described flat part, be connected by plunger rod between described stopper head with the second stopper head, described first sealing is arranged in the peripheral side of described stopper head, described second sealing is arranged in the peripheral side of described second stopper head, arrange between described balancing gate pit and described pressure-less chamber and flow to one-way flow device in described balancing gate pit from described pressure-less chamber for molten metal bath, described one-way flow device is suitable for closing in described plunger material shooting process, and open in described plunger return process.

Described stopper head has cavity, and described cavity has the opening be communicated with the balancing gate pit in described stopper head front, and what described first sealing was formed between described cavity and described stopper head outside wall surface has in the thin slice district of certain deformability; Described thin slice district forms described one-way flow device.

Described first sealing is the seal convexity of at least one annular be molded on described stopper head lateral wall.

The both sides of described seal convexity are respectively arranged with annular groove, and described annular groove and described seal convexity circumference be arranged in parallel.

Described seal convexity is provided with twice, and spaced apart by one described annular groove between seal convexity described in twice.

The outline of described seal convexity is arc-shaped structure; The longitudinal cross-section semicircular in shape of described annular groove.

The described opening part of described cavity is provided with the stopping means for limiting described cavity excessive expansion or excess shrinkage.

Described stopping means comprises the dividing plate on the end face being fixed on described stopper head, and the push rod be arranged in described cavity, one end of described push rod is fixed on the bottom of described cavity, the other end of described push rod is conflicted on described dividing plate, between described dividing plate and described end face, and described dividing plate or there is between described push rod and the opening of described stopper head the gap being communicated with described balancing gate pit and described cavity.

The area of described dividing plate is substantially equal with the area of the end face of described stopper head, and described dividing plate is bolted on the described end face of described stopper head by some.

Described push rod extends the end face of described stopper head from the opening part of described cavity, and the center, side coordinated with described push rod of described dividing plate is provided with groove, and described push rod inserts in described groove.

The one end side coordinated with described cavity of described push rod offers screw thread, and axle center place, described cavity bottom offers screw, and described push rod coordinates the bottom screwing in described cavity also fixing by screw thread with screw.

Described second stopper head and described plunger rod are relative to the central point symmetrical configuration of the length direction of described plunger rod.

The arranged outside of described barrel has heater.

Technique scheme of the present utility model has the following advantages compared to existing technology:

1. the utility model horizontal type cold-chamber die casting feeding system by arranging molten metal passage on barrel body, and molten metal passage is communicated with Metal Melting room (for melting crucible or other device of metal) by pipeline, by controlling the liquid level of the molten metal bath of Metal Melting indoor, effectively can control the amount of the molten metal bath flowed in balancing gate pit, in trend balancing gate pit, appropriate molten metal bath is injected after achieving each plunger return, and then be convenient to control injection rate, shorten injection time, improve die casting efficiency.

2. the vertical passageway of horizontal type cold-chamber die casting feeding system of the present utility model extends to the outside of barrel from the inner chamber of barrel, one end be positioned at outside barrel of interconnection is sealed by sealing-plug, this setup is convenient to be discharged in time by molten metal bath residual in barrel inner chamber and molten metal passage after die casting, avoids molten metal bath condensation and result in blockage or affect plunger action in inner chamber and molten metal passage.

3. the flat part inner chamber upper wall of the utility model horizontal type cold-chamber die casting feeding system barrel is connected by the rake transition being arranged on flat part end with gooseneck portion inner chamber upper wall, and make the minimum point of rake lower than the minimum point of the discharging opening in described gooseneck portion, by making, between the minimum point of the minimum point of rake and gooseneck portion discharging opening, there is suitable difference in height, and then be convenient to control molten metal bath be full of whole balancing gate pit, the liquid level of molten metal bath is only needed to be not less than the height of the minimum point of rake, just molten metal bath is full of in whole balancing gate pit, and the liquid surface height controlling of molten metal bath is being no more than the height of minimum point of gooseneck portion discharging opening, molten metal bath would not overflow in balancing gate pit, owing to being filled with molten metal bath in balancing gate pit, only have the top in gooseneck portion to be detained and have a small amount of air, during injection, these a small amount of air are easy to be discharged, and then avoid entrained air bubbles in foundry goods and affect casting quality.

4. the material feeding mode of material injection device of the present utility model is in the flat part of barrel, arrange the balancing gate pit of one-way flow (this balancing gate pit is mainly used in depositing molten metal to be injected, in material shooting process, during plunger driven forward, volume in balancing gate pit diminishes, the pressure of molten metal will raise) (this balancing gate pit is communicated with working chamber with pressure-less chamber, molten metal is in atmospheric pressure state), the pressure-less chamber of barrel is communicated with Metal Melting room, arranges and flow to one-way flow device in balancing gate pit from pressure-less chamber for molten metal bath between balancing gate pit and pressure-less chamber, owing to being filled with molten metal bath in balancing gate pit, the movement travel of plunger can be shortened, and then save power and energy, shorten injection cycle, and by pressure-less chamber being communicated with Metal Melting room, the molten metal bath in balancing gate pit enters in pressure-less chamber, can greatly reduce injection time, improve casting efficiency, and owing to being full of molten metal bath in the inherent casting process in balancing gate pit and pressure-less chamber always, barrel is consistent all the time with the temperature of molten metal bath with plunger, so just reduce with temperature after making up this molten metal bath and entering barrel without the need to molten metal being heated to a higher temperature in working chamber, only molten metal need be heated to temperature during a little higher than shooting material, the molten metal liquid temperature that comparable tradition enters in barrel reduces about 50 degree, and the easy control of temperature of molten metal bath in barrel, and then effectively prevent barrel material and plunger material, to be in high-temperature phase-change interval and reduce service life, also can save a large amount of energy costs for melting metal material simultaneously.Although visible material injection device structure of the present utility model is simple, but solves many technical barriers of present cold chamber die-casting machine, there is revolutionary technological break-through.

5. the two ends of horizontal type cold-chamber die casting feeding system of the present utility model are respectively equipped with the first sealing and the second sealing, and the first sealing in described stopper head thin slice district shrink with cavity and and produce gap between material tube inner wall, can be injected in trend balancing gate pit from the pressure-less chamber formed between the first sealing, the second sealing, plunger rod and material tube inner wall by this gap for molten metal bath, first sealing expands with cavity and strengthens the sealing property with material tube inner wall, and the larger sealing property of the pressure that shoots material is better.Adopt the material injection device of double containment plunger of the present utility model, greatly reduce the die casting cycle, improve production efficiency; In addition, adopt the material injection device of double containment plunger of the present utility model, its barrel contacts with molten metal bath all the time with plunger, therefore their temperature is equal, therefore the temperature of the molten metal in die casting progressive die chamber can be reduced, and then prevent mould deliquescing, cracking, the mold use life-span can be extended.

6. horizontal type cold-chamber die casting feeding system of the present utility model, its first sealing is the seal convexity of at least one annular be molded on stopper head lateral wall, sealing projection can not only reduce the frictional force of plunger in barrel in reciprocatory movement, reduce wear, can also sealing property be improved simultaneously.

7. horizontal type cold-chamber die casting feeding system of the present utility model, its seal convexity both sides are provided with annular groove, and described annular groove and seal convexity circumference be arranged in parallel, sealing groove, while raising thin slice district deformability, can also guarantee the sealing property between seal convexity and material tube inner wall.

8. horizontal type cold-chamber die casting feeding system of the present utility model, the opening part of its cavity is provided with the stopping means for limiting cavity excessive expansion or excess shrinkage, by arranging this stopping means, can not only ensure that stopper head has good working order, can also prevent because the pressure that shoots material is excessive and make plunger stuck simultaneously.

9. horizontal type cold-chamber die casting feeding system of the present utility model, the stopper head at the two ends of its plunger rod and the second stopper head are relative to the central point symmetrical configuration of plunger rod length direction, also namely described stopper head is consistent with the structure of described second stopper head, and this setup is convenient to assembling, is safeguarded.

10. material injection device of the present utility model comprises barrel and double containment plunger, namely traditional cold chamber die casting equipment can be applicable to material injection device of the present utility model without the need to spending more cost or making compared with macrostructure change, and material injection device of the present utility model can shorten the die casting cycle, enhance productivity, the temperature of the molten metal that shoots material can be reduced, for the molten metal bath of metallic aluminium, the molten metal bath of comparable traditional die casting equipment reduces about 50 degree, therefore can effectively prevent mould deliquescing, cracking, greatly extend the mold use life-span.

The flat part of 11. the utility model material injection devices and the arranged outside in gooseneck portion have heater, and this heater suitably can heat the molten metal bath in barrel, makes it remain on the temperature that shoots material always, and then improve casting quality, enhance productivity.

Accompanying drawing explanation

In order to make content of the present utility model be more likely to be clearly understood, below according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein:

Fig. 1 is the plunger of horizontal type cold-chamber die casting feeding system of the present utility model structural representation when being positioned at initial position;

Fig. 2 be the plunger of horizontal type cold-chamber die casting feeding system of the present utility model be positioned at maximum shoot material position time structural representation;

The structural representation that the barrel of Fig. 3 horizontal type cold-chamber die casting feeding system of the present utility model coordinates with plunger;

Fig. 4 is the structural representation of the plunger of the utility model horizontal type cold-chamber die casting feeding system;

Fig. 5 be the plunger of the utility model horizontal type cold-chamber die casting feeding system partly cut open structural representation;

Fig. 6 is the structural representation of the stopper head of the utility model horizontal type cold-chamber die casting feeding system;

Fig. 7 is the plunger of feeding system of the present utility model another kind of embodiment structural representation when being positioned at initial position;

Fig. 8 be the plunger of the another kind of embodiment of feeding system of the present utility model be positioned at maximum shoot material position time structural representation.

In figure, Reference numeral is expressed as:

10-barrel; 100-balancing gate pit; 101-pressure-less chamber; 102-heater; 105-discharging opening; The minimum point of 1051-discharging opening; 108-flat part; 1080-rake; The minimum point of 1081-rake; 109-gooseneck portion; 110-heat insulating sleeve; 2-plunger; 20-plunger rod; 21-stopper head; 21 '-the second stopper head; 22,22 '-cavity; 23,23 '-thin slice district; 24-seal convexity; 24 '-the second sealing; 240,240 '-annular groove; 25,25 '-push rod; 26,26 '-end face; 27,27 '-dividing plate; 28,28 '-gap; 3-molten metal passage; 31-vertical passageway; 32-interconnection; 4-pipeline; 5-Metal Melting room; 6-mold cavity.

Detailed description of the invention

Embodiment one

See Fig. 1-3, a kind of horizontal type cold-chamber die casting feeding system, it comprises barrel 10, the plunger 2 for the molten metal bath injection in barrel 10 being entered in mold cavity 6 is provided with in described barrel 10, the tail end of described plunger 2 is connected with driving mechanism, the sidewall of described barrel 10 is provided with the molten metal passage 3 for injecting molten metal bath for described barrel 10, and described molten metal passage 3 is communicated in Metal Melting room 5 by pipeline 4, described plunger 2 comprise along its axially spaced-apart arrange for shooting material time the first sealing of sealing and the second sealing of revealing backward of molten metal bath for preventing in described barrel 10, described first sealing, die cavity between the inwall of described barrel 10 and the discharging opening 105 of described barrel 10 forms the balancing gate pit 100 for storing molten metal bath to be shot material, described first sealing, die cavity between the inwall of described second sealing and described barrel 10 forms pressure-less chamber 101, described molten metal passage 3 is suitable for being communicated with described balancing gate pit 100 when described plunger 2 is positioned at initial position, and be suitable for described plunger 2 carry out shooting material or homing action time be communicated with described pressure-less chamber 101.

When shooting material, plunger 2 promotes left, and the molten metal bath injection in balancing gate pit 100 is entered in mold cavity 6, seal between the inwall of the first sealing and barrel 10 and be slidably matched, be leaked in pressure-less chamber 101 to prevent the molten metal bath in balancing gate pit 100 from sealing station, the inwall of the second sealing and barrel 10 also seals and is slidably matched simultaneously, to prevent the molten metal bath in balancing gate pit 100 from the right side of the second sealing, also namely the rear of barrel is revealed.Molten metal passage 3 needs to arrange in place, see Fig. 1, now plunger 2 is positioned at initial position, and the opening of molten metal passage 3 is now positioned at the left side of the seal convexity 24 of stopper head 21 just, and the molten metal bath now in Metal Melting room 5 is communicated with balancing gate pit 100; See Fig. 2, now plunger is positioned at the maximum position that shoots material, and the opening of molten metal passage 3 is positioned at the left side of the second seal convexity 24 ' on the second stopper head 21 ' just, and now Metal Melting room 5 is communicated with pressure-less chamber 101.And plunger 2 is shooting material with in reseting procedure, the opening of molten metal passage 3 is communicated with described pressure-less chamber 101 all the time, only move to initial position at plunger, when being also the position shown in Fig. 1, the opening of molten metal passage 3 is just positioned at the left side of seal convexity 24 just, and molten metal passage 3 is just communicated with balancing gate pit 100.

The horizontal type cold-chamber die casting feeding system of the present embodiment by arranging molten metal passage on barrel body, and molten metal passage is communicated with Metal Melting room by pipeline, by controlling the liquid level of the molten metal bath of Metal Melting indoor, effectively can control the amount of the molten metal bath flowed in balancing gate pit, in trend balancing gate pit, appropriate molten metal bath is injected after achieving each plunger return, and then be convenient to control injection rate, shorten injection time, improve die casting efficiency.

In the present embodiment, described molten metal passage 3 comprises the vertical passageway 31 that the radial direction along described barrel 10 is arranged and the interconnection 32 arranged along the axis of described barrel 10, described interconnection 32 is arranged in the body of described barrel 10, one end of described interconnection 32 is communicated with described vertical passageway 31, the other end of described interconnection 32 extends on the end face of close described driving mechanism side of described barrel 10, and is tightly connected with described pipeline 4.Described interconnection 31 extends to the outside of described barrel 10 from the inner chamber of described barrel 10, and one end be positioned at outside described barrel 10 of described interconnection 31 is sealed by sealing-plug.

The vertical passageway of the horizontal type cold-chamber die casting feeding system of the present embodiment extends to the outside of barrel from the inner chamber of barrel, one end be positioned at outside barrel of interconnection is sealed by sealing-plug, this setup is convenient to be discharged in time by molten metal bath residual in barrel inner chamber and molten metal passage after die casting, avoids molten metal bath condensation and result in blockage or affect plunger action in inner chamber and molten metal passage.

See Fig. 3, described barrel 10 in the present embodiment comprises flat part 108, and be arranged on the gooseneck portion 109 of described flat part 108 discharging one end, the inner chamber in described gooseneck portion 109 tilts obliquely and is communicated with die cavity, the inner chamber upper wall of described flat part 108 is connected by rake 1080 transition being arranged on described flat part 108 end with the inner chamber upper wall in described gooseneck portion 109, the minimum point 1081 of described rake 1080 is lower than the minimum point 1051 of the discharging opening 105 in described gooseneck portion 109, by there is suitable difference in height between the minimum point 1051 of the discharging opening 105 of the minimum point 1081 and gooseneck portion 109 that make rake 1080, as can be seen from Fig. 1-3, the minimum altitude of the molten metal bath in barrel 10 is the liquid level that dotted line B represents, its maximum temperature is the liquid level that dotted line A represents, only need by the liquid surface height controlling of the molten metal bath in balancing gate pit 100 between dotted line A and dotted line B, then just be full of molten metal bath in whole balancing gate pit 100.In addition, flow without molten metal when the liquid level of balancing gate pit, pressure-less chamber and Metal Melting indoor is contour, therefore by controlling the liquid level C of molten metal bath in working chamber, carrying out the amount of the indoor injection molten metal of controlled pressure, and then improving the control ability to injecting molten metal; Certainly other control mode can also be adopted.Due to can molten metal bath be full of in balancing gate pit 100, and then the air capacity in balancing gate pit 100 can be greatly reduced, and then effectively prevent from causing in foundry goods body because air capacity can not be discharged in time too greatly in injection process have air blister defect; And owing to being full of molten metal bath in balancing gate pit 100 always, greatly can shorten the injection stroke of plunger, and then save power and energy.

In the present embodiment, described plunger 2 comprises and being arranged in described flat part 108 inner chamber and the stopper head 21 coordinated with the inwall slipper seal of described flat part 108 and the second stopper head 21 ', described stopper head 21 is connected by plunger rod 20 with between the second stopper head 21 ', form the pressure-less chamber 101 for depositing molten metal bath between described stopper head 21, described second stopper head 21 ', described plunger rod 20 and described flat part 108, described pressure-less chamber 101 is communicated with Metal Melting room; The balancing gate pit 100 for depositing molten metal bath to be injected is formed between the inwall of described stopper head 21, described gooseneck portion 109 and described flat part 108, arrange between described balancing gate pit 100 and described pressure-less chamber 101 and flow to one-way flow device in described balancing gate pit 100 from described pressure-less chamber 101 for molten metal bath, described one-way flow device is suitable for closing in described plunger 21 material shooting process, and opens in described plunger 21 reseting procedure.Also namely the balancing gate pit of barrel can be automatically injected appropriate molten metal bath in material shooting process, greatly saves traditional scoop material feeding injection rate and is not easy to control, and expend the more operating time, and then have a strong impact on the drawback of casting efficiency.

The material injection device of the present embodiment is full of molten metal bath due to balancing gate pit and pressure-less chamber in casting process always, barrel is consistent all the time with the temperature of molten metal bath with plunger, so just enter the temperature after barrel without the need to molten metal being heated to a higher temperature in working chamber reduce to make up this molten metal bath, only molten metal need be heated to temperature during a little higher than shooting material, therefore the molten metal liquid temperature that comparable tradition enters in barrel reduces about 50 degree, and the easy control of temperature of molten metal bath in barrel, and then effectively prevent barrel material and plunger material, to be in high-temperature phase-change interval and reduce the defect in service life, also can save a large amount of energy costs for melting metal material simultaneously.

See Fig. 4-6, the described stopper head 21 of the present embodiment has cavity 22, described cavity 22 has the opening be communicated with the balancing gate pit 100 in stopper head 21 front, and what described first sealing was formed between described cavity 22 and described stopper head 21 outside wall surface has in the thin slice district 23 of certain deformability; In material shooting process, the high-pressure smelting molten metal in described balancing gate pit 100 enters in described cavity 22, is outwards expanded in described thin slice district 23 and then strengthens the sealing contact strength of described first sealing and described flat part 108 inwall; In reseting procedure, plunger 2 moves backward (being also that in Fig. 2, plunger moves right), the volume of balancing gate pit 100 becomes large, the metal enclosed formation that discharging opening 105 described in described balancing gate pit 100 internal cause is cooled and negative pressure also make described thin slice district 23 shrink to axle center place, and then make the molten metal bath formed between described first sealing and the inwall of described flat part 108 in the described pressure-less chamber 101 of confession flow into gap in described balancing gate pit 100; Described thin slice district 23 forms described one-way flow device.Certain described one-way flow device also can be the structure arranging a similar check valve on stopper head 21, as the cavity 22 at stopper head 2 bottom with the through hole that is communicated with pressure-less chamber 101 and balancing gate pit 100 is set between pressure-less chamber 101, and in the side being positioned at cavity 22 of through hole a hinged sealing plate that can cover this through hole, when plunger 2 carries out shooting material action, high-pressure metal hydraulic pressure in balancing gate pit 100 is compeled sealing plate and is sealed this through hole, when plunger 2 resets backward, molten metal bath in pressure-less chamber 101 backs down sealing plate, and to enter in balancing gate pit 100 by this through hole.

By the two ends at described plunger, the first sealing and the second sealing 24 ' are set respectively, after described plunger is assembled to the inner chamber (being also the inner chamber of flat part 108) of described barrel 10, described first sealing, described second sealing 24 ', the pressure-less chamber 101 for depositing molten metal bath is formed between the inwall of described plunger rod 20 and described barrel 10, simultaneously, one is offered for injecting the running channel of molten metal bath in described pressure-less chamber in the position corresponding with described pressure-less chamber 101 of barrel 10, described running channel is communicated to Metal Melting room, or adopt scoop filling, to ensure the molten metal being full of melting in described pressure-less chamber all the time, first all molten metal bath is full of by described balancing gate pit 100 and described pressure-less chamber 101 when first time uses, then promote described plunger be pushed into the maximum position that shoots material complete first time shoot material, now due to the molten metal cooling forming in mould and mould pouring basin, described discharging opening 105 is closed, when plunger moves backward, the space of described balancing gate pit 100 increases gradually, and form relative vacuum (negative pressure), cavity 22 in described stopper head 21 can shrink to axle center place, and then make to produce a gap between described first sealing 24 and described material tube inner wall, under the effect of pressure reduction, molten metal bath in pressure-less chamber 101 can flow in described balancing gate pit 100 along described gap, simultaneously, the molten metal bath of described Metal Melting indoor then can add in described pressure-less chamber 101 endlessly, when described plunger moves to initial position backward, all molten metal bath is full of in described balancing gate pit 100 and described pressure-less chamber 101, after this continuous casting operation can be carried out, substantially increase injection efficiency, and the amount injected is convenient to control, be adapted to automation, the requirement of high efficiency manipulation.

Because the opening of cavity 22 is communicated with balancing gate pit 100, when piston carries out shooting material action, the molten metal bath of squeeze pressure indoor 100, and the motlten metal hydraulic coupling in described balancing gate pit 100 is raised, the pressure of the molten metal bath simultaneously in cavity 22 also synchronously raises, now described cavity 22 can expand a certain amount of, and injection pressure is higher, the swell increment of cavity 22 is larger, because stopper head 21 is provided with thin slice district 23, the expansion of described cavity 22 is the most obvious in the outside in thin slice district 23, and the arranged outside in thin slice district 23 has the seal convexity 24 of annular, therefore, the seal convexity 24 of described annular tightly can be conflicted on the inwall of barrel 10 along with the expansion of described cavity 22, with the sealing property between the inwall strengthening seal convexity 24 and barrel 10.And due to the contact area between seal convexity 24 and barrel 10 inwall less, rub less, therefore with the increase of injection pressure, the motion of plunger in barrel 10 can't be affected.

As can be seen from above-mentioned, the two ends of described plunger are arranged respectively the first sealing and the second sealing, and make described first sealing be arranged in the thin slice district 23 of described stopper head 21, greatly can shorten casting cycle on the one hand, because when described plunger shoot material complete get back to initial position time, the molten metal of melting has all been filled with in described balancing gate pit 100 and described pressure-less chamber 101, namely for shooting material next time is got ready while it gets back to initial position, therefore shorten die casting time, its production efficiency improves greatly, on the other hand, owing to defining pressure-less chamber 101 between plunger and the inwall of barrel 10, and pressure-less chamber 101 is all full of molten metal bath in whole material shooting process, therefore the inwall of barrel 10 has identical temperature with plunger body and molten metal bath, do not have obvious temperature from the molten metal bath of the indoor inflow of described Metal Melting to reduce, therefore when casting aluminum product, the temperature of molten metal solutions (aluminium) in barrel 10 is convenient to control at about 600 degree, also namely molten metal bath (aluminium) temperature injected in die cavity is 600 degree substantially, mould deliquescing because of annealing that this temperature can not make employing H13 steel make, cracking, and then substantially prolongs die life.

In the present embodiment, described first sealing is the seal convexity 24 of the twice annular be molded on described stopper head 21 lateral wall.Because between described seal convexity 24 and the inwall of described barrel 10, contact area is less, therefore the frictional force of plunger when moving back and forth is less, and wearing and tearing are comparatively light, and good sealing effect, seal convexity 24 described in twice is set and then can strengthens sealing property further.

In the present embodiment, the both sides of described seal convexity 24 are respectively arranged with annular groove 240, and spaced apart by one described annular groove 240 between seal convexity 24 described in twice, and described annular groove 240 be arranged in parallel with described seal convexity 24 circumference.Described annular groove 240 forms continuous print wavelike structure with described seal convexity 24 on the surface of described stopper head 21, and (axis along described plunger is partly cutd open, can obviously see wavy structure, see Fig. 2), and thickness is the thinnest part in described thin slice district 23 between described annular groove 240 and the inwall of described cavity 22, by arranging described annular groove 240, the deformability in thin slice district 23 can be strengthened further, and then make the elastic packing better effects if of described first sealing.

In the present embodiment, the outline of described seal convexity 24 is arc-shaped structure, is linear contact lay substantially during the contact internal walls of this structure and described barrel 10, and the force of sliding friction between the inwall that greatly can reduce described plunger and described barrel 10, reduces wearing and tearing; And the longitudinal cross-section semicircular in shape of described annular groove 240, be then conducive to described thin slice district 23 and be out of shape.

In the present embodiment, the described opening part of described cavity 22 is provided with the stopping means for limiting the excessive expansion of described cavity 22 or excess shrinkage.Described stopping means comprises the dividing plate 27 on the end face 26 being fixed on described stopper head 21, and the push rod 25 be arranged in described cavity 22, one end of described push rod 25 is fixed on the bottom of described cavity 22, the other end of described push rod 25 is conflicted on described dividing plate 27, has the gap 28 being communicated with described balancing gate pit 100 and described cavity 22 between described dividing plate 27 with described end face 26.By arranging described stopping means; described stopper head 23 excessive expansion when injection pressure can be prevented excessive; even by stuck for described plunger; or described stopper head 23 excess shrinkage when preventing the vacuum in described balancing gate pit 100 excessive; exceed the normal elastic returning scope in described thin slice district 23; therefore, described stopping means can damage by the available protecting stopper head 21 with deformability, and then increases the service life.

In the present embodiment, the area of described dividing plate 27 is substantially equal with the area of the end face 26 of described stopper head 21, and described dividing plate 27 is bolted on the described end face 26 of described stopper head 21 by some so that assembling, maintenance.

In the present embodiment, described push rod 25 extends the end face 26 of described stopper head 21 from the opening part of described cavity 22, the center, side coordinated with described push rod 25 of described dividing plate 27 is provided with groove, described push rod 25 inserts in described groove, and described groove is convenient to described push rod 25 and described dividing plate 27 relative positioning.

In the present embodiment, the one end side coordinated with described cavity 22 of described push rod 25 offers screw thread, axle center place, described cavity 22 bottom offers screw, described push rod 25 coordinates the bottom screwing in described cavity 22 also fixing by screw thread with screw, adopts threaded screw bore to coordinate the assembling being convenient to described push rod 25.

Dividing plate 27 described in the present embodiment and leave certain gap 28 between described end face 26, between described push rod 25 and the opening of described stopper head 21, described gap 28 is communicated with described balancing gate pit 100 and described cavity 22, and described molten metal can flow between described balancing gate pit 100 and described cavity 22; Certainly, by the size in the described gap 28 of adjustment, molten metal can also be made when flowing through described gap 28 to have certain damping action, and then also can prevent the excessive expansion of described cavity 22 or contraction.

Embodiment two

The present embodiment provides a kind of horizontal type cold-chamber die casting feeding system, it is the further improvement on embodiment 1 basis, in the present embodiment, be installed in described barrel 10 for the ease of double containment plunger of the present utility model, and guarantee that described plunger has comparatively stable operation fortune state in barrel 10, on the basis of above-described embodiment one, described second stopper head 21 ' and the central point symmetrical configuration of described stopper head 21 relative to the length direction of described plunger rod 20, also namely described second stopper head 21 ' is consistent with the structure of described stopper head 21, this setup is conducive to ensureing that the sealing at described plunger its two ends when described barrel 10 runs is substantially equal with material tube inner wall frictional force, can comparatively steadily surely move back and forth along axis direction, and then guarantee accurate die casting, and where necessary, described stopper head 21 can also be exchanged installation site with described second stopper head 21 '.

See Fig. 2-4, the concrete structure of described second stopper head 21 ' is: it comprises cavity 22 ', thin slice district 23 ' is formed between the lateral wall of described cavity 22 ' and described stopper head, described thin slice district 23 ' is provided with two seals projection, separated by one annular groove 240 ' between seal convexity described in two, described two seals projection is described second sealing 24 ', the push rod 25 ' be threaded also is provided with in described cavity 22 ', described push rod 25 ' is against in the central slot of dividing plate 27 ', gap 28 ' is formed between the end face 26 ' of described dividing plate 27 ' and the second stopper head 21 '.

Embodiment three

The present embodiment provides a kind of horizontal type cold-chamber die casting feeding system, it is the distortion on embodiment one or two basis, in the present embodiment, see Fig. 7, Fig. 8 (for the ease of demonstrating the concrete structure of fluid heater, the structure of molten metal passage 3 is eliminated) in these two figure, the arranged outside in described flat part 108 and described gooseneck portion 109 has heater 102, described heater 102 is hot fluid heats device, and the arranged outside of described heater 102 has the heat insulating sleeve 110 for being incubated.This heater 102 suitably can heat the molten metal bath in barrel 10, makes it remain on the temperature that shoots material always, and then improves casting quality, enhances productivity.This heat insulating sleeve 110 1 aspect can prevent the material tube inner wall of high temperature and heater and outside air generation heat exchange and reduce temperature, simultaneously can also effectively anti-operating personnel with the outer wall generation scald accident of unexpected touching heater, and then improve the security performance of equipment.

Preferred as one, described flat part 108, described gooseneck portion 109 and described heater 102 are set to integral structure, and described hot fluid heats device is arranged on the body interior of barrel 10.

Below in conjunction with Fig. 1, Fig. 2, Fig. 7, Fig. 8, the operation principle of the utility model material injection device is described:

See Fig. 1, Fig. 7, now described plunger is positioned at initial position, the molten metal of melting is all full of in described balancing gate pit 100 and described pressure-less chamber 101, the pressure of the molten metal bath now in described balancing gate pit 100 and described pressure-less chamber 101 is substantially equal, and described molten metal passage 3 is communicated with balancing gate pit 100.During die casting, driving mechanism drives described plunger 2 to left movement, seal convexity 24 crosses the opening of molten metal passage 3, molten metal passage 3 is communicated with pressure-less chamber 100, the pressure of the metallic solution simultaneously in described stopper head 21 left pressure chamber 100 raises, and the molten metal bath in described balancing gate pit 100 enters in cavity 22 from gap 28, described cavity 22 radially outwards expands (direction of arrow see in Fig. 5 cavity 22) under the effect of the molten metal bath of high pressure, make the inwall close contact of the first sealing on stopper head and barrel 10, and the pressure that shoots material is larger, sealing effectiveness between first sealing and barrel 10 inwall is better.

See Fig. 2, Fig. 8, now described plunger motion is to the maximum position that shoots material, shoot material release, now fill molten metal bath in mold cavity 6 and be condensed into foundry goods, when described plunger 2 moves right, due to the metal blocking that discharging opening 105 place is cooled, the space of balancing gate pit 100 becomes large, form relative vacuum, now cavity 22 can radially shrink to axle center place, and then make, between the first sealing 24 and the inwall of barrel 10, there is a gap, molten metal bath in pressure-less chamber 101 adds in described balancing gate pit 100 along described gap under the effect of the pressure, when described plunger motion is to the initial position (position shown in Fig. 4, now due to the elastic force effect in thin slice district 23, described seal convexity 24 is outwards only by the wall of described barrel 10, the inwall of described barrel 10 applies to described seal convexity 24 reaction force that is pointed to axle center simultaneously, the direction of arrow see in Fig. 4 cavity 22) time, described seal convexity 24 moves to the right side of the opening of described molten metal passage 3, described balancing gate pit 100 is communicated with molten metal passage 3, the molten metal of melting is all full of in described balancing gate pit 100 and described pressure-less chamber 101, in barrel, molten metal bath is added again to initial position without the need to plunger motion will be waited as traditional material injection device, therefore the fluid injection time can be saved, greatly shorten the die casting cycle, enhance productivity.

And heater of the present utility model suitably can heat the molten metal bath in flat part and gooseneck portion, make it remain on the suitable temperature that shoots material always, and then improve casting quality, enhance productivity.

Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain that the utility model creates.

Claims (15)

1. a horizontal type cold-chamber die casting feeding system, it is characterized in that: comprise barrel (10), the plunger (2) for the molten metal bath injection in described barrel (10) being entered in mold cavity (6) is provided with in described barrel (10), the tail end of described plunger (2) is connected with driving mechanism, the sidewall of described barrel (10) is provided with the molten metal passage (3) for injecting molten metal bath for described barrel (10), and described molten metal passage (3) is communicated in Metal Melting room (5) by pipeline (4), described plunger (2) comprise along its axially spaced-apart arrange for shooting material time the first sealing of sealing and the second sealing of revealing backward of molten metal bath for preventing in described barrel (10), described first sealing, die cavity between the inwall of described barrel (10) and the discharging opening (105) of described barrel (10) forms the balancing gate pit (100) for storing molten metal bath to be shot material, described first sealing, die cavity between the inwall of described second sealing and described barrel (10) forms pressure-less chamber (101), described molten metal passage (3) is suitable for being communicated with described balancing gate pit (100) when described plunger (2) is positioned at initial position, and be suitable for described plunger (2) carry out shooting material or homing action time be communicated with described pressure-less chamber (101).

2. a kind of horizontal type cold-chamber die casting feeding system according to claim 1, it is characterized in that: described molten metal passage (3) comprises the vertical passageway (31) that the radial direction along described barrel (10) is arranged and the interconnection (32) arranged along the axis of described barrel (10), described interconnection (32) is arranged in the body of described barrel (10), one end of described interconnection (32) is communicated with described vertical passageway (31), the other end of described interconnection (32) extends on the end face of close described driving mechanism side of described barrel (10), and be tightly connected with described pipeline (4).

3. a kind of horizontal type cold-chamber die casting feeding system according to claim 2, it is characterized in that: described interconnection (31) extends to the outside of described barrel (10) from the inner chamber of described barrel (10), one end being positioned at described barrel (10) outside of described interconnection (31) is sealed by sealing-plug.

4. according to the arbitrary described a kind of horizontal type cold-chamber die casting feeding system of claim 1-3, it is characterized in that: described barrel (10) comprises flat part (108), and be arranged on the gooseneck portion (109) of described flat part (108) discharging one end, the inner chamber of described gooseneck portion (109) tilts obliquely and is communicated with described mold cavity (6), the inner chamber upper wall of described flat part (108) is connected by rake (1080) transition being arranged on described flat part (108) end with the inner chamber upper wall of described gooseneck portion (109), the minimum point (1081) of described rake (1080) is lower than the minimum point (1051) of the discharging opening (105) of described gooseneck portion (109), the liquid level of the molten metal bath in described Metal Melting room (5) is between the peak and the minimum point (1051) of described discharging opening (105) of described flat part (108) inner chamber.

5. a kind of horizontal type cold-chamber die casting feeding system according to claim 4, it is characterized in that: described plunger (2) comprises and being arranged in described flat part (108) inner chamber and the stopper head (21) coordinated with the inwall slipper seal of described flat part (108) and the second stopper head (21 '), be connected by plunger rod (20) between described stopper head (21) with the second stopper head (21 '), described first sealing is arranged in the peripheral side of described stopper head (21), described second sealing is arranged in the peripheral side of described second stopper head (22), arrange between described balancing gate pit (100) and described pressure-less chamber (101) and flow to one-way flow device in described balancing gate pit (100) from described pressure-less chamber (101) for molten metal bath, described one-way flow device is suitable for closing in described plunger (21) material shooting process, and open in described plunger (21) reseting procedure.

6. a kind of horizontal type cold-chamber die casting feeding system according to claim 5, it is characterized in that: described stopper head (21) has cavity (22), described cavity (22) has the opening be communicated with the balancing gate pit (100) in described stopper head (21) front, described first sealing be positioned at formed between described cavity (22) and described stopper head (21) outside wall surface have in the thin slice district (23) of certain deformability; Described thin slice district (23) forms described one-way flow device.

7. a kind of horizontal type cold-chamber die casting feeding system according to claim 5 or 6, it is characterized in that: described first sealing is the seal convexity (24) of at least one annular be molded on described stopper head (21) lateral wall, the both sides of described seal convexity (24) are respectively arranged with annular groove (240), and described annular groove (240) and described seal convexity (24) circumference be arranged in parallel.

8. a kind of horizontal type cold-chamber die casting feeding system according to claim 7, it is characterized in that: described seal convexity (24) is provided with twice, and by described annular groove (240) is spaced apart together between seal convexity described in twice (24), the outline of described seal convexity (24) is arc-shaped structure; The longitudinal cross-section semicircular in shape of described annular groove (240).

9. a kind of horizontal type cold-chamber die casting feeding system according to claim 8, is characterized in that: the described opening part of described cavity (22) is provided with the stopping means for limiting (22) excessive expansion of described cavity or excess shrinkage.

10. a kind of horizontal type cold-chamber die casting feeding system according to claim 9, it is characterized in that: described stopping means comprise be fixed on described stopper head (21) end face (26) on dividing plate (27), and the push rod (25) be arranged in described cavity (22), one end of described push rod (25) is fixed on the bottom of described cavity (22), the other end of described push rod (25) is conflicted on described dividing plate (27), between described dividing plate (27) and described end face (26), and described dividing plate (27) or have between described push rod (25) and the opening of described stopper head (21) is communicated with the gap (28) of described balancing gate pit (100) and described cavity (22).

11. a kind of horizontal type cold-chamber die casting feeding systems according to claim 10, it is characterized in that: the area of described dividing plate (27) is substantially equal with the area of the end face (26) of described stopper head (21), and described dividing plate (27) is bolted on the described end face (26) of described stopper head (21) by some.

12. a kind of horizontal type cold-chamber die casting feeding systems according to claim 10 or 11, it is characterized in that: described push rod (25) extends the end face (26) of described stopper head (21) from the opening part of described cavity (22), the center, side coordinated with described push rod (25) of described dividing plate (27) is provided with groove, and described push rod (25) inserts in described groove.

13. a kind of horizontal type cold-chamber die casting feeding systems according to claim 12, it is characterized in that: the one end side coordinated with described cavity (22) of described push rod (25) offers screw thread, described cavity (22) axle center, bottom place offers screw, and described push rod (25) coordinates the bottom screwing in described cavity (22) also fixing by screw thread with screw.

14. a kind of horizontal type cold-chamber die casting feeding systems according to claim 13, is characterized in that: described second stopper head (21 ') and the central point symmetrical configuration of described plunger rod (20) relative to the length direction of described plunger rod (20).

15. a kind of horizontal type cold-chamber die casting feeding systems according to any one of claim 1-3, is characterized in that: the arranged outside of described barrel (10) has heater (102).