A kind of injection mold special part
Technical field
This utility model relates to technical field of mold, particularly relates to a kind of injection mold special part.
Background technology
Mould makes blank become the instrument of the product having given shape and size under external force.It is widely used in the compression moulding of goods such as stamping-out, die forging, cold-heading, extruding, metallic sintered products compacting, compression casting, and engineering plastics, rubber, pottery or the forming of injection.Mould has specific profile or cavity shape, and application has the contour shape of cutting edge can make blank separate by contour line shape.Application cavity shape can make blank obtain corresponding three-dimensional shape.Mould generally comprises dynamic model and two parts of cover half, the two partable.Take out product time separately, make blank inject mold cavity when closing up and shape.Mould is precision instrument, complex-shaped, bears the expansive force of blank, all has higher requirements structural strength, rigidity, case hardness, surface roughness and machining accuracy.Injection mold is a kind of instrument producing plasthetics;Also the instrument of plasthetics complete structure and accurate dimension it is to confer to.A kind of processing method that injection mo(u)lding is used when being and produce some complex-shaped parts in batches.Refer specifically to by high pressure, the material melted that is heated is injected die cavity, after cooled solidification, obtain formed products.Sprue bush in injection mold is arranged on cover half and locating ring generally by bolt, is to use segment design simultaneously, easily produces drainage.
Utility model content
This utility model is in order to overcome deficiency of the prior art, it is provided that a kind of injection mold special part.
This utility model is to be achieved through the following technical solutions:
A kind of injection mold special part, including sprue bush upper end, sprue bush lower end, described sprue bush upper end has feeding-passage A, described sprue bush lower end has feeding-passage B, the upper end of described sprue bush lower end offers groove, the inwall of groove is provided with female thread, the downside outer wall of described sprue bush upper end offers external screw thread, described sprue bush upper end and sprue bush lower end are threaded connection, and offer cannelure on the groove end face of described sprue bush lower end, the lower end of described sprue bush upper end is provided with ring shaped retainer member, described ring shaped retainer member is arranged in cannelure, and it is provided with sealing gasket between described sprue bush upper end and sprue bush lower end.
As optimal technical scheme of the present utility model, as optimal technical scheme of the present utility model, described sprue bush lower end offers spiral cooling water flow conduits, one end of described cooling water flow conduits is communicated with water inlet, the other end is communicated with outlet, and described water inlet and outlet are distributed in the not homonymy of sprue bush lower end.
As optimal technical scheme of the present utility model, described sealing gasket is rectangular seal pad, and sealing gasket uses elastomeric material to make.
As optimal technical scheme of the present utility model, described feeding-passage A is cylindrical channel, and described feeding-passage B is conicylindrical passage.
Compared with prior art, the beneficial effects of the utility model are: this utility model uses screw thread to be installed together in sprue bush upper end and sprue bush lower end, easy accessibility, it is provided by ring shaped retainer member, it is convenient for fixed and positioned, is provided by sealing gasket, it is possible to increase its sealing effectiveness.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with drawings and Examples, this utility model is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain this utility model, is not used to limit this utility model.
Referring to Fig. 1, Fig. 1 is structural representation of the present utility model.
Described a kind of injection mold special part, including sprue bush upper end 1, sprue bush lower end 2, described sprue bush upper end 1 has feeding-passage A11, and described sprue bush lower end 2 has feeding-passage B21, described feeding-passage A11 is cylindrical channel, and described feeding-passage B21 is conicylindrical passage.Sprue bush upper end 1 matches with spreader, and sprue bush lower end 2 matches with the shooting pots of injection machine.
The upper end of described sprue bush lower end 2 offers groove, the inwall of groove is provided with female thread 3, the downside outer wall of described sprue bush upper end 1 offers external screw thread, described sprue bush upper end 1 and sprue bush lower end 2 are threaded connection, and offer cannelure on the groove end face of described sprue bush lower end 2, the lower end of described sprue bush upper end 1 is provided with ring shaped retainer member 4, described ring shaped retainer member 4 is arranged in cannelure, and is provided with sealing gasket 5 between described sprue bush upper end 1 and sprue bush lower end 2.In use, screw thread is used to be installed together in sprue bush upper end 1 and sprue bush lower end 2, easy accessibility, it is provided by ring shaped retainer member, it is simple to carry out fixed and positioned, be provided by sealing gasket, it is possible to increase its sealing effectiveness.
Described sprue bush lower end 2 offers spiral cooling water flow conduits 22, one end of described cooling water flow conduits 22 is communicated with water inlet 23, the other end is communicated with outlet 24, and described water inlet 23 and outlet 24 are distributed in the not homonymy of sprue bush lower end 2, thus at the cooling water pipeline being internally formed spiral of sprue bush lower end 2.
Described sealing gasket 5 is rectangular seal pad, and sealing gasket 5 uses elastomeric material to make.
Above are only preferred embodiment of the present utility model, not in order to limit this utility model, all any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, within should be included in protection domain of the present utility model.