Bush is pressed and is annotated multicavity mould
The technical field is as follows:
the utility model relates to a bush pressure injection multi-cavity mould.
in the moving parts, parts are worn due to long-term friction, so that a lining is present, the lining can be conveniently replaced after being worn, and the parts can be replaced after being worn if the lining is not used. Present bush structure is various, the application also presents the diversification, like the bush structure shown in fig. 1, the centre is solid construction, both sides are inside to be equipped with the bell jar respectively, current mould is at the design in-process, it is protruding to need set up the toper respectively on last mould and lower mould, a taper slot to the bush both sides carries out the shaping, but because the bell jar cell wall is thinner, it is very narrow to add the space of feeding during processing, the selection requirement to the cutter is very high, the feeding degree of difficulty is big, the processing degree of difficulty is high, it just can damage the cutter to have improper slightly, the cycle and the cost of mould design processing have been increased, become the technological problem that needs to solve in the trade urgently.
The utility model has the following contents:
the utility model discloses a remedy prior art not enough, provide a bush pressure injection multi-cavity die, reasonable in design, processing is easy, has reduced the requirement to the cutter, has shortened mould processing cycle, has reduced mould processing cost, has solved the problem that exists among the prior art.
The utility model discloses a solve the technical scheme that above-mentioned technical problem adopted and be:
a bushing injection molding multi-cavity die comprises an upper die, a middle die and a lower die, wherein an injection molding runner is arranged on the outer surface of the upper die, a plurality of upper cavities are arranged on the inner side of the upper die, the upper cavities are communicated with the injection molding runner through injection holes formed in the upper die, upper cores matched with a conical groove on one side of a bushing in shape are arranged in the upper cavities, and a plurality of guide pillars are further installed on the lower side of the upper die; a middle cavity matched with the shape of the bush is arranged in the middle die corresponding to the upper cavity, a plurality of guide sleeves are arranged in the middle die corresponding to the guide posts, and the guide posts are movably inserted in the guide sleeves; the position activity that corresponds middle cavity in the lower mould has placed down the core, and the core top matches with the bell mouth shape of bush opposite side in extending middle cavity down, and core bottom activity cartridge is equipped with the ejector pin in the backing plate of lower mould downside, the position that corresponds core bottom down, and the ejector pin bottom is equipped with the ejector pin mounting panel.
The upper core is fixedly connected with the upper die through a screw.
And the base plate is provided with positioning columns inserted in the middle die and the lower die.
An upper fixing plate is installed on the outer side of the upper die through a bolt, and a lower fixing plate is installed on the outer side of the lower die through a bolt.
The lower core comprises a rod body, a conical bulge matched with the conical groove on the other side of the lining in shape and a conical table arranged between the rod body and the conical bulge, a conical table groove matched with the conical table is arranged in the lower die, and the lower core is movably arranged in the lower die through the matching of the conical table and the conical table groove.
The runner of moulding plastics includes the cross sprue, and four tip of cross sprue are connected with the cross subchannel respectively, and four tip of cross subchannel are connected with the in-line subchannel respectively, the both ends of in-line subchannel respectively with the filling hole is linked together.
The above technical scheme is adopted in the utility model, following advantage has:
in view of the utility model discloses the particularity of bush structure has carried out the design improvement to the mould, only processes the cavity in last mould, through last core is used for carrying out the shaping to the bell jar of bush one side in last mould installation, and the core is used for carrying out the shaping to the bell jar of bush opposite side under the mould installation down, and lower core still plays the ejecting effect of product, and mould processing is easy, has reduced the requirement to the cutter, has shortened mould processing cycle, has reduced mould processing cost.
Description of the drawings:
fig. 1 is a schematic view of a bushing.
Fig. 2 is a schematic perspective view of the present invention.
Fig. 3 is a schematic sectional view of the present invention.
Fig. 4 is a schematic structural view of the lower core of the present invention.
In the figure, 1, an upper die, 2, a middle die, 3, a lower die, 4, an upper cavity, 5, an injection hole, 6, an upper core, 7, a guide pillar, 8, a middle cavity, 9, a guide sleeve, 10, a lower core, 11, a base plate, 12, an ejector rod, 13, an ejector rod mounting plate, 14, a screw, 15, a positioning column, 16, an upper fixing plate, 17, a lower fixing plate, 18, a rod body, 19, a conical groove, 20, a conical bulge, 21, a conical table, 22, a cross main runner, 23, a cross branch runner, 24, an in-line branch runner, 25 and a bush.
The specific implementation mode is as follows:
in order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments in combination with the accompanying drawings.
As shown in fig. 2-4, a multi-cavity mold for bush injection comprises an upper mold 1, a middle mold 2 and a lower mold 3, wherein an injection molding flow channel is arranged on the outer surface of the upper mold 1, a plurality of upper cavities 4 are arranged on the inner side of the upper mold 1, the upper cavities 4 are communicated with the injection molding flow channel through injection holes 5 arranged in the upper mold 1, an upper core 6 matched with a conical groove 19 on one side of a bush 25 in shape is arranged in the upper cavities 4, and a plurality of guide posts 7 are further arranged on the lower side of the upper mold 3; a middle cavity 8 matched with the shape of the bush is arranged in the middle die 2 corresponding to the upper cavity 4, a plurality of guide sleeves 9 are arranged in the middle die 2 corresponding to the guide posts 7, and the guide posts 7 are movably inserted in the guide sleeves 9; lower core 10 has been placed to the position activity that corresponds middle cavity 8 in the lower mould 3, and lower core 10 top extends in middle cavity 8 and the shape matches with the taper groove 19 shape of bush opposite side, and lower core 10 bottom activity cartridge is equipped with ejector pin 12 in the backing plate 11 of lower mould 3 downside, the position that corresponds lower core 10 bottom, and ejector pin 12 bottom is equipped with ejector pin mounting panel 13.
The upper core 6 is fixedly connected with the upper die 1 through a screw 14, so that assembly is facilitated.
And the base plate 11 is provided with a positioning column 15 inserted in the middle mold 2 and the lower mold 3, so that the positioning and the assembly among the base plate 11, the middle mold 2 and the lower mold 3 are facilitated.
Go up the mould 1 outside and install upper fixed plate 16 through the bolt, lower fixed plate 17 is installed through the bolt in the lower mould 3 outside, is convenient for go up the mould 1 and assemble between lower mould 3 and other parts.
The lower core 10 comprises a rod body 18, a conical bulge 20 matched with the conical groove 19 on the other side of the lining 25 in shape, and a conical table 21 arranged between the rod body and the conical bulge, a conical table groove matched with the conical table 21 is formed in the lower die 3, the lower core 10 is movably arranged in the lower die 3 through the matching of the conical table 21 and the conical table groove, the lower core 10 can accurately fall into the conical table groove after rising and then falls back, the lower core 10 is stably arranged, and the position is accurate.
The runner of moulding plastics includes cross sprue 22, and four tip of cross sprue 22 are connected with cross runner 23 respectively, and four tip of cross runner 23 are connected with a straight runner 24 respectively, a straight runner 24 both ends respectively with the filling hole 5 is linked together, and runner reasonable in design is ingenious, and each injection molding chamber is injected into with the raw materials to make full use of mould space, convenience.
During injection molding, raw materials uniformly enter the cross-shaped sub-runners 23 from the cross-shaped main runner 22, then enter the in-line sub-runners 24 from the cross-shaped sub-runners 23, and then enter the upper chamber 4 and the middle chamber 8 from the in-line sub-runners 24 through the injection holes 5, so that the raw materials can be ensured to uniformly enter, and the consistency of the molded product is ensured. After injection molding, the upper die 1 rises, the guide pillar 7 and the guide sleeve 9 are matched to play a role in guiding the upper die 1 to ascend and descend, the stability during ascending and descending is guaranteed, then the ejector rod mounting plate 13 drives the ejector rod 12 to move upwards, the ejector rod 12 pushes the lower core 10 to move upwards to eject a product, and after the product is taken away, the final bushing product can be obtained by slightly trimming. The mandril mounting plate 13 drives the mandril 12 to move downwards, and the lower core 10 automatically falls back into the frustum groove of the lower die 3 under the action of gravity.
The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.
The parts of the present invention not described in detail are the known techniques of those skilled in the art.