CN208290381U - A kind of flow passage structure of plastic mould - Google Patents

Abstract

The utility model discloses a kind of flow passage structures of plastic mould, including sprue nozzle, hot flow path distribution system and injection-moulding nozzle；Hot flow path distribution system includes the hot runner manifold for the balance hot flow path of water conservancy diversion molten plastic and for splicing composition hot flow path, insulating layer is filled with inside two layers of hot runner manifold, each junction of the hot runner manifold of splicing is inlaid with fixed-function block, and the inner surface of fixed-function block is connected with seal weatherstrip；It balances uniformly to dig on the hot runner manifold of hot flow path inner wall and has heater wire ring recess, arrangement is equipped with for realizing the electromagnetic heating coil of interior heating operation in heater wire ring recess, and goes back pad on the contact surface of electromagnetic heating coil and heater wire ring recess and have heat-insulated protective pad for partiting thermal insulation；Freely increasing and decreasing to runner number may be implemented in the utility model, suitable for different processing mold environment, and has partition heating and pressure detecting function, is suitable for thermo-sensitive material and processes, effectively improves final product quality.

Description

A kind of flow passage structure of plastic mould

Technical field

The utility model relates to plastic mould field, specially a kind of flow passage structure of plastic mould.

Background technique

Hot runner Technology is a new technology of injection molding of plastics processing, injection molding machine nozzle can be made to injection moulding die casting mouth Plastics remain molten condition, do not need solidification as waste material in each die sinking and take out, and be trapped in running gate system Melt can next time inject when by injection type chamber, the quality and production efficiency of moulding can be greatly improved in this way.

As the price of hot runner mould is greatly reduced, will be used wider and wider for Hot runner Technology is general, on the whole From the point of view of, North America and Europe are longer using the Hot runner Technology time, and hot flow path use experience is more, hot runner mould manufacture level phase That answers is much higher, although well-known manufacturer's manufacture level in these areas is very high, its valuable product, delivery date is long, dimension Repair inconvenience；Domestic hot runner mould application also has the history of more than ten years, but traditional cold runner still occupy it is sizable Ratio, Hot runner Technology are also reached also in research and extension stage, the Hot runner Technology application aggregate level of correlation injection molding enterprise It is required less than high level.

Such as Authorization Notice No. is a kind of guide's distributor for plastic extruder of 207059183U, including connection It distributor body on extruder, the isocon being arranged in inside distributor body and is set in one heart in isocon and interior Portion has the spreader of centre bore, and in the utility model, the is formed between the outer wall of isocon and the inner wall of distributor body One runner forms second flow channel between the inner wall of isocon and the outer wall of spreader, the centre bore of spreader forms third flow channel, First runner, second flow channel, third flow channel rear end mutually staggered in the axial direction of isocon, in this case, by guide One hollow spreader is set in distributor, so that each runner being split mutually staggers in the axial direction, is isolated each other, So that raw material can be realized uniform divided flows in guide's distributor；Although the utility model can be realized uniform divided flows, not Suitable for the mold environment with multiple injection points, and do not have independent partitions heating function, is not suitable for thermal sensitivity plastics and adds Work.

Summary of the invention

In order to overcome the shortcomings of prior art, the utility model provides a kind of flow passage structure of plastic mould, can have Effect solves the problems, such as that background technique proposes.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

A kind of flow passage structure of plastic mould, it is described including the sprue nozzle for connecting injection raw material input mechanism The output end of sprue nozzle is connected with the hot flow path for the plastic melt from injection molding machine nozzle to be transported to each cast gate Distribution system, each delivery outlet of the hot flow path distribution system are inlaid with the injection molding being connected directly with each mold cavity and spray Mouth；

The hot flow path distribution system includes for the balance hot flow path of water conservancy diversion molten plastic and for splicing composition hot-fluid The hot runner manifold in road, the hot runner manifold are double-layer structure, are filled with insulating layer, the hot flow path of splicing inside two layers of hot runner manifold Each junction of plate is inlaid with and the fixed-function block that connect angular shape and match, the inner surface clamping of the fixed-function block There is the seal weatherstrip for improving sealing performance；Uniformly digging on the hot runner manifold of the balance hot flow path inner wall has heating coil Slot, the interior arrangement of the heater wire ring recess are equipped with for realizing the electromagnetic heating coil of interior heating operation, and electromagnetic heating coil There is heat-insulated protective pad for partiting thermal insulation with pad is gone back on the contact surface of heater wire ring recess.

Further, the section shape structure of the balance hot flow path is H-type, and the equal length of every section of runner is adjacent Balance hot flow path is connected with series connection balance pipe.

Further, the hot runner manifold integrally uses high temperature resistant composite material to be made, the inner surface of hot runner manifold Turning transition position is all made of circular arc bent plate and is made.

Further, the feed inlet clamping of the sprue nozzle is socketed with the high temperature resistant mistake for carrying out molten mass filtering Strainer, the feed inlet junction of sprue nozzle and hot flow path distribution system be also equipped with for control feed pressure adjustment from Dynamic relief valve.

Compared with prior art, the utility model has the beneficial effects that

(1) the utility model connects hot runner manifold by setting fixed-function block by setting hot flow path distribution system, can To increase or reduce the number of real balance hot flow path according to actual needs, to meet the demand of different processing environments, greatly The big flexibility for improving flow passage structure；Hot flow path is balanced by setting, is realized with balance pipe of connecting mutual between adjacent channels Circulation realizes that balance mold filling improves quality；Electromagnetic heating coil is installed by setting heater wire ring recess, with heat-insulated protective pad every Hot property forms heating zone, realizes independent heating control respectively using each electromagnetic heating coil, convenient for temperature-sensitive material Processing temperature control, to further increase final product quality；

(2) filtering to raw material may be implemented by installing high temperature resistant filter screen in sprue nozzle in the utility model Operation, prevents line clogging；Real-time monitoring is carried out to injection pressure by setting automatic pressure relief valve and carries out releasing pressure automatically behaviour Make, effectively increases the security and stability of device.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the structural schematic diagram of hot runner manifold.

Figure label:

1- sprue nozzle；2- hot flow path distribution system；3- injection-moulding nozzle；

101- high temperature resistant filter screen；102- automatic pressure relief valve；

201- hot runner manifold；202- insulating layer；203- balances hot flow path；204- fixed-function block；205- seal weatherstrip； 206- heater wire ring recess；207- electromagnetic heating coil；The heat-insulated protective pad of 208-；209- series connection balance pipe.

Specific embodiment

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work Every other embodiment obtained, fall within the protection scope of the utility model.

As shown in Figure 1, the utility model provides a kind of flow passage structure of plastic mould, including for connecting injection raw material The sprue nozzle 1 of input mechanism, the output end of the sprue nozzle 1 are connected with for will be from the plastics of injection molding machine nozzle Melt conveying to each cast gate hot flow path distribution system 2, each delivery outlet of the hot flow path distribution system 2 be inlaid with respectively The injection-moulding nozzle 3. that a mold cavity is connected directly

The feed inlet clamping of the sprue nozzle 1 is socketed with the high temperature resistant filter screen 101 for carrying out molten mass filtering, The feed inlet junction of sprue nozzle 1 and hot flow path distribution system 2 is also equipped with for controlling the automatic of feed pressure adjustment Relief valve 102；The sprue nozzle 1 is used to for the molten plastic that injection molding machine squeezes out importeding into hot flow path distribution system 2, when When there is the particle not melted completely in molten plastic, impurity is filtered out by high temperature resistant filter screen 101, to guarantee molten slurry in heat Flowing is smooth in Distribution system of flow channel 2, prevents line clogging situation, influences injection molding effect；Since molten plastic exists High pressure is generated when being added in runner, if squeeze pressure is excessive to exceed secure threshold, it is possible to cause runner to rupture, therefore pacify It fills automatic pressure relief valve 102 and auto-real-time monitoring is carried out to pressure, the releasing pressure automatically if reaching upper pressure limit guarantees device peace Entirely.

The hot flow path distribution system 2 includes for the balance hot flow path 203 of water conservancy diversion molten plastic and for splicing composition The hot runner manifold 201 of hot flow path, the hot runner manifold 201 are double-layer structure, are filled with insulating layer inside two layers of hot runner manifold 201 202, each junction of the hot runner manifold 201 of splicing be inlaid with the fixed-function block 204 that connect angular shape and match, it is described The inner surface of fixed-function block 204 is connected with the seal weatherstrip 205 for improving sealing performance；The fixed-function block 204 will Two pieces of sealings of hot runner manifold 201 to connect are stitched together, thus adjust balance hot flow path 203 according to actual needs with can be convenient Actual number, and also multi-layer flow channels system is formed so that hot runner manifold 201 to be successively superimposed, in order to increase while can be with The quantity of injection molding.

It should be added that hot runner manifold 201 is the core element in hot runner system, effect is will be from note The plastic melt of moulding machine nozzle is transported to each cast gate, and the processing temperature of plastics is heated to by external heating source in the heating period, Then injection cycle compensate as heat loss and caused by thermal loss；

Preferably, the section shape structure of the balance hot flow path 203 is H-type, and the equal length of every section of runner is adjacent Balance hot flow path 203 be connected with series connection balance pipe 209；Flow passage system is arranged with equal flow path length, obtains geometric parameters The balance of amount, the balance mold filling of hot runner manifold can get broad injection parameter, and can improve the quality of product.

It is made as shown in Fig. 2, the hot runner manifold 201 is whole of high temperature resistant composite material, hot runner manifold 201 Inner surface turning transition position is all made of circular arc bent plate and is made, and molten mass can be effectively prevented in this way, and in the corner of pipeline, accumulation is become silted up Plug reduces the waste to raw material.

Uniformly digging on the hot runner manifold 201 of balance 203 inner wall of hot flow path has heater wire ring recess 206, the heating Arrangement is equipped with the electromagnetic heating coil 207 for realizing interior heating operation in coil slot 206, and electromagnetic heating coil 207 with Pad is gone back on the contact surface of heater wire ring recess 206 heat-insulated protective pad 208 for partiting thermal insulation.

Theoretically hot runner system should keep given temperature value, and whole system is in thermal equilibrium state.Carry out The arrangement and heating power size of heater are fully considered when the design of hot runner manifold.In the portion that hot flow path is contacted with mold Position, which has thermal loss, causes local temperature to reduce, and considers that element is heat-insulated so to give when arranging heating element on flow distribution plate Problem.

In the present embodiment, the heater wire ring recess 206 is dug according to the profile of hot runner manifold 201, and each Electromagnetic heating coil 207 is independently installed, may be implemented to utilize heat-insulated protective pad to the independent control of each injection molding channel temperature 208 are thermally shielded protection, form specific heating zone, by heating zone and independent temperature control, can efficiently control The Temperature Distribution of entire hot runner system, plays the advantage of hot runner system.

It is obvious to a person skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and And without departing substantially from the spirit or essential attributes of the utility model, it can realize that this is practical new in other specific forms Type.Therefore, in all respects, the present embodiments are to be considered as illustrative and not restrictive, this is practical new The range of type is indicated by the appended claims rather than the foregoing description, it is intended that containing for the equivalent requirements of the claims will be fallen in All changes in justice and range are embraced therein.It should not treat any reference in the claims as limiting Related claim.

Claims (4)

1. a kind of flow passage structure of plastic mould, it is characterised in that: including the sprue for connecting injection raw material input mechanism The output end of nozzle (1), the sprue nozzle (1) is connected with for the plastic melt from injection molding machine nozzle to be transported to respectively Each delivery outlet of the hot flow path distribution system (2) of a cast gate, the hot flow path distribution system (2) is inlaid with and each mould type The injection-moulding nozzle (3) that chamber is connected directly；

The hot flow path distribution system (2) includes for the balance hot flow path (203) of water conservancy diversion molten plastic and for splicing composition The hot runner manifold (201) of hot flow path, the hot runner manifold (201) are double-layer structure, are filled with inside two layers of hot runner manifold (201) Insulating layer (202), each junction of the hot runner manifold (201) of splicing are inlaid with and the fixed function that connect angular shape and match Block (204), the inner surface of the fixed-function block (204) are connected with the seal weatherstrip (205) for improving sealing performance；It is described Balancing uniformly to dig on the hot runner manifold (201) of hot flow path (203) inner wall has heater wire ring recess (206), the heater wire ring recess (206) arrangement is equipped with electromagnetic heating coil (207) for realizing interior heating operation in, and electromagnetic heating coil (207) with Pad is gone back on the contact surface of heater wire ring recess (206) heat-insulated protective pad (208) for partiting thermal insulation.

2. a kind of flow passage structure of plastic mould according to claim 1, it is characterised in that: the balance hot flow path (203) section shape structure is H-type, and the equal length of every section of runner, it is flat that adjacent balance hot flow path (203) is connected with series connection Weighing apparatus pipe (209).

3. a kind of flow passage structure of plastic mould according to claim 1, it is characterised in that: the hot runner manifold (201) Whole to be made of high temperature resistant composite material, the inner surface turning transition position of hot runner manifold (201) is all made of circular arc bent plate It is made.

4. a kind of flow passage structure of plastic mould according to claim 1, it is characterised in that: the sprue nozzle (1) Feed inlet clamping be socketed with high temperature resistant filter screen (101) for carrying out molten mass filtering, sprue nozzle (1) and hot flow path The feed inlet junction of distribution system (2) is also equipped with the automatic pressure relief valve (102) for controlling feed pressure adjustment.