Background
At present, a sand core is added in the casting process of the friction wheel hub, so that the cast friction wheel hub has a hollow structure, and the friction wheel sand core is manufactured through the sand core mould.
The Chinese patent with the application number 202010328738 discloses a high-efficiency one-out multi-valve-cover sand core die casting device, which comprises an upper die, a lower die and valve-cover sand cores, wherein the upper die and the lower die are arranged up and down, the valve-cover sand cores of the upper die are arranged in the upper die and the lower die, the valve-cover sand cores of the upper die are connected with bolts of the valve-cover sand cores of the lower die, pouring ports are further formed in the upper die, the valve-cover sand cores comprise valve-cover sand core main bodies and pouring channels, a plurality of small sand core hole ends are symmetrically arranged around the valve-cover sand core main bodies, and the valve-cover sand core main bodies are symmetrically distributed on two sides of the pouring channels.
In the above-mentioned scheme, penetrate sand machine downwards with the tectorial membrane sand injection pouring gate in, tectorial membrane sand flows in the pouring passageway, but under the effect of gravity when tectorial membrane sand, the mobility of tectorial membrane sand is relatively poor, can only rely on the extrusion between the sand to flow. When the device is used for casting the friction wheel sand core, the friction wheel is different in shape, and the mobility of precoated sand is poor, so that the cavity of the friction wheel sand core is not full in filling, and the manufactured friction wheel sand core does not meet the requirements.
Disclosure of utility model
The utility model aims to provide a vertical grinding wheel sand core mould which can avoid poor fluidity of precoated sand, ensure full filling of a grinding wheel sand core cavity and ensure that the manufactured grinding wheel sand core meets the requirements of one mould, multiple cores and multiple sand injection ports.
The vertical friction wheel sand core die comprises an upper die and a lower die which are arranged along the up-down direction, wherein a friction wheel sand core cavity is formed between the upper die and the lower die, at least two friction wheel sand core cavities are respectively arranged on the left side and the right side of the upper die and the lower die, the left friction wheel sand core cavity and the right friction wheel sand core cavity are symmetrically arranged, a sand inlet is formed between the upper die and the lower die, each friction wheel sand core cavity is provided with one sand inlet, the sand inlets extend along the left-right direction, sand injection plates are arranged on the left side and the right side of the upper die and the lower die, and sand injection ports corresponding to the sand inlets of the friction wheel sand core cavities in a one-to-one mode are arranged on the sand injection plates.
Wherein, the shooting plate is fixed on the output of shooting machine. The upper die and the lower die are arranged along the up-down direction, the upper die and the lower die are arranged vertically, and the die is more convenient to install on a machine table than a horizontal die.
When the sand injection device is used, the upper die and the lower die are covered, the sand injection machine moves along the left and right directions, the sand injection plate of the sand injection machine is attached to the left and right side walls of the upper die and the lower die, then the sand injection machine starts to inject sand, and the precoated sand is injected from the sand injection port and enters the sand inlet, so that the precoated sand enters the friction wheel sand core cavity, and the sand injection device is used for filling the friction wheel sand core cavity.
According to the scheme, each friction wheel sand core cavity corresponds to a sand shooting port for sand feeding, sand feeding and mold filling effects are better, meanwhile, left and right sand shooting enable precoated sand to have inertia moving left and right when entering the friction wheel sand core cavity, the precoated sand can move leftwards or rightwards for a certain distance in the friction wheel sand core cavity, mobility is better for the friction wheel sand core cavity of the opposite polarity, mold filling is more full, and the manufactured friction wheel sand core is higher in qualification rate.
Preferably, the axial direction of the friction wheel sand core cavity is along the up-down direction.
The friction wheel mainly comprises a wheel hub, a wheel spoke and a wheel rim, the axial direction of a sand core cavity of the friction wheel is along the up-down direction, the axial direction of the cast sand core of the friction wheel is set up in the up-down direction, when sand is fed left and right, the sand has inertia moving leftwards or rightwards, and the wheel hub cavity, the wheel spoke cavity and the wheel rim cavity of the sand core of the friction wheel can be better filled, so that the filling is full.
Preferably, a plurality of heating pipes extending along the front-back direction are arranged in the upper die and the lower die, and the heating pipes are positioned above and below the sand core die cavity of the friction wheel.
Heating pipes are arranged on the upper die and the lower die, so that the molding efficiency of precoated sand can be accelerated, and the mold filling is plump.
Preferably, a positioning structure is arranged between the upper die and the lower die, and the positioning structure comprises a positioning hole extending along the up-down direction and a positioning protrusion extending into the positioning hole.
And the positioning structure is arranged between the upper die and the lower die, so that the precision of the upper die and the lower die in the covering process is ensured, and the sand core cavity of the friction wheel is ensured not to deviate.
Preferably, the upper end of the upper die and the lower end of the lower die are connected and fixed with an organic table connecting plate, and the organic table connecting plate is used for being connected with a machine table.
Through setting up the board connecting plate, make things convenient for the connection and the fixed between mould and the board, reduce die filling time and reduce die filling intensity of labour.
Preferably, the machine connecting plate is slidably arranged on the machine, the machine is provided with a matching groove extending along the front-back direction, and the machine connecting plate is provided with a matching part extending along the front-back direction and used for being slidably matched with the matching groove.
The machine table connecting plate is in sliding fit with the machine table, so that the whole upper die and the lower die can move on the machine table along the front-back direction, the positions of the upper die and the lower die are convenient to adjust, the sand inlet of the upper die and the lower die are aligned with the sand outlet of the sand shooting plate, and the precoated sand has better fluidity during sand shooting. After the adjustment is finished, the locking can be realized through the matching of the bolt and the nut.
Preferably, the machine connecting plate is connected with the upper die and the lower die through connecting columns, and the connecting columns are arranged in a replaceable mode.
The connecting column connects the machine table connecting plate with the upper die and the lower die, and the connecting column is arranged in a replaceable mode, so that operators can replace the connecting columns with different lengths, and the die opening stroke of the upper die and the lower die can be changed.
The utility model has the advantages that each friction wheel sand core cavity corresponds to a sand injection port for sand feeding, sand feeding and filling effects are better, meanwhile, the left and right sand injection ensures that the precoated sand has inertia moving left and right when entering the friction wheel sand core cavity, the precoated sand can move leftwards or rightwards for a certain distance in the friction wheel sand core cavity, the mobility is better for the opposite friction wheel sand core cavity, the filling is more full, and the manufactured friction wheel sand core has higher qualification rate.
Detailed Description
The utility model is further described below with reference to the drawings and specific embodiments.
As shown in fig. 1 and 2, this embodiment discloses a vertical grinding wheel sand core mold with one mold and multiple sand injection ports, which comprises an upper mold 1 and a lower mold 2 which are arranged up and down, wherein the upper end of the upper mold 1 and the lower end of the lower mold 2 are fixedly connected with a machine connecting plate 5 through a connecting column 6, and the machine connecting plate 5 passes through the connecting column 6 through bolts to be in threaded fixation with the upper mold 1 and the lower mold 2, so that the connecting column 6 can be arranged in a replaceable manner. The machine connecting plate 5 is used for being connected with a machine (not shown in the figure), the machine is provided with a matching groove (not shown in the figure) extending along the front-back direction, the matching groove is any existing T-shaped groove, and the machine connecting plate 5 is provided with a matching part (not shown in the figure) extending along the front-back direction and slidingly matching with the matching groove. A long hole extending along the front-rear direction is arranged between the machine connecting plate 5 and the machine, and the machine is locked by the bolt passing through the long hole and the nut (not shown in the figure).
The upper die 1 and the lower die 2 jointly form a friction wheel sand core cavity 3 for forming sand cores, the number of the friction wheel sand core cavities 3 is six, the friction wheel sand core cavities 3 are symmetrically distributed on the left side and the right side of the upper die 1 and the lower die 2, and three friction wheel sand core cavities 3 are respectively arranged on the left side or the right side of the upper die 1 and the lower die 2. The axial direction of the grinding wheel sand core cavity 3 is arranged along the up-down direction. Three groups of heating pipes 7 are arranged on the upper die 1 and the lower die 2, the three groups of heating pipes 7 are arranged at intervals along the left-right direction, and the heating pipes 7 extend along the front-back direction and are respectively positioned above and below the grinding wheel sand core cavity 3. A positioning structure is arranged between the upper die 1 and the lower die 2, the positioning structure comprises a positioning hole 82 extending in the up-down direction and a positioning protrusion 81 extending into the positioning hole 82, the positioning hole 82 is arranged on the lower die 2 and is opened upwards, and the positioning protrusion 81 is arranged on the upper die 1 and extends downwards.
A sand inlet 43 is arranged between the upper die 1 and the lower die 2, each sand inlet 43 extends along the left-right direction, and each sand inlet 43 corresponds to one friction wheel sand core cavity 3. The left side and the right side of the upper die 1 and the lower die 2 are respectively provided with a sand shooting plate 4, the sand shooting plates 4 are fixed on the output end 42 of the sand shooting machine, and the sand shooting plates 4 are provided with sand shooting ports 41 which are in one-to-one correspondence with the sand inlet ports 43.
When casting the sand core, upper mould 1 and lower mould 2 cover closes, and the sand shooting machine moves and contacts with the left and right sides of upper mould 1 and lower mould 2 to the left and right sides of upper mould 1 and lower mould 2, later begins to penetrate sand for the tectorial membrane sand is full of whole friction wheel sand core die cavity 3, and heating pipe 7 heats friction wheel sand core die cavity 3 for tectorial membrane sand shaping. And then the sand shooting machine is far away from the upper die 1 and the lower die 2, the upper die 1 and the lower die 2 are opened, and an operator takes out the friction wheel sand core.