CN208730259U - Bindiny mechanism for piston in hot runner system and needle - Google Patents

Abstract

The utility model discloses the bindiny mechanism for piston in hot runner system and needle, including locking member and washer, wherein, the periphery of locking member is equipped with external screw thread, top end face is equipped with interior hexagonal and twists slot, bottom face is equipped with inner groovy, needle is equipped with ring muscle, end is coupled, piston is equipped with loading chute room, through-hole, washer is set to the bottom of fitting groove room, needle passes through washer and through-hole, the bottom face of ring muscle and the top end face of washer abut against, it is mutually threadedly coupled between locking member and the cell wall of fitting groove room, and inner groovy matches with mating end to be docked, the end face of lug boss and the top end face of ring muscle abut against.The utility model uses specific locking member, can play the restriction effect to needle, ensure the verticality of needle, meet accuracy requirement.The design of washer and gasket ring piece forms cyclic annular confined space between needle, while playing buffer protection function, provides enough sealing performances.Whole design is succinct, is easy to stablize mating between piston and needle.

Description

Bindiny mechanism for piston in hot runner system and needle

Technical field

The utility model relates to a kind of bindiny mechanism more particularly to a kind of companies for piston in hot runner system and needle Connection mechanism belongs to the technical field of bindiny mechanism in hot runner system.

Background technique

Hot flow path is to guarantee that the plastics of runner and cast gate are kept molten by by the method for heating, hot runner system one As be made of several parts such as hot nozzle, flow distribution plate, temperature control box and attachment, hot nozzle generally comprises two kinds: open hot nozzle and Needle valve type hot nozzle since hot nozzle form directly determines that hot runner system selects the manufacture with mold, thus often accordingly will Hot runner system is divided into open hot runner system and needle valve type hot runner system.

Needle valve type hot runner saves material, plastic surface aesthetic, while internal soundness is close, intensity is high.Have at present two big Class needle valve type hot runner: air-cylinder type and spring.Air-cylinder type pushes the pass of needle-valve according to controller and sequence controller control cylinder It closes, structure is more complex, but itself designs simple.

It include piston, needle, cylinder body in cylinder using integrated cylinder for air-cylinder type hot runner system Deng, and piston needs and needle Joint.

It in the prior art, is that needle is fixed by adjusting screw without a head, needle briquetting, valve needle cushion block, needle pressure Block is that plane abuts with the top end face of needle, is had the following disadvantages, is on the one hand difficult to ensure the verticality of needle, on the other hand It needs adjusting screw without a head to carry out cooperation with needle briquetting to crimp, it is low to be related to part integrated level, and leakproofness is insufficient.

Utility model content

The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art, and leakproofness unstable for needle verticality The problem of energy difference, proposes a kind of bindiny mechanism for piston in hot runner system and needle.

In order to achieve the above object, the technology employed by the present utility model is

For the bindiny mechanism of piston in hot runner system and needle, including locking member and washer,

Wherein, the locking member is oblate columnar structures, and the periphery of the locking member is equipped with external screw thread, and the locking The top end face of part is equipped with interior hexagonal for screwing and twists slot, and bottom face is equipped with lug boss, the lug boss and bottom face it Between form land, the end face of the lug boss is equipped with the inner groovy for being limited to the needle,

The needle is equipped with ring muscle, and the top of the ring muscle is equipped with for the mating end in the inner groovy to be coupled,

The piston is equipped with loading chute room, and the bottom of the loading chute room is equipped with the through-hole passed through for the needle,

The washer is set to the bottom of the fitting groove room, and one end of the needle passes through the washer and described logical The top end face of the bottom face and the washer of hole and the ring muscle abuts against, the slot of the locking member and the fitting groove room It is mutually threadedly coupled between wall, the inner groovy matches with the mating end to be docked, the end face of the lug boss and the ring muscle Top end face abut against.

Preferably, gasket ring piece is equipped between the end face of the lug boss and the top end face of the ring muscle.

Preferably, the periphery of the washer is equipped with the tubulose outer towards the locking member direction, the tubulose outer Free end is abutted against with the land, and the inner wall of the tubulose outer is equipped with cyclic annular limiting groove, the outer rim of the gasket ring piece It is embedded in the cyclic annular limiting groove.

Preferably, the outer rim of the gasket ring piece is arc convex, and the ring-type limiting groove is and the arc convex phase Matched arc groove.

Preferably, the diameter of the through-hole is greater than the main diameter of the needle.

Preferably, the internal diameter of the washer is greater than the main diameter of the needle and is not less than the diameter of the through-hole.

The beneficial effects of the utility model are mainly reflected in:

1. using specific locking member, the restriction effect to needle can be played, ensures the verticality of needle, meets precision need It asks.

2. the design of washer and gasket ring piece forms cyclic annular confined space between needle, plays the same of buffer protection function When, provide enough sealing performances.

3. whole design is succinct, it is easy to stablize mating between piston and needle.

Detailed description of the invention

Fig. 1 is schematic cross-sectional view of the utility model for the bindiny mechanism of piston and needle in hot runner system.

Fig. 2 is the schematic cross-sectional view of locking member in the utility model.

Specific embodiment

The utility model provides the bindiny mechanism for piston and needle in hot runner system.Below in conjunction with attached drawing to this reality It is described in detail with new technique scheme, so that it is more readily understood and grasps.

For the bindiny mechanism of piston in hot runner system and needle, as depicted in figs. 1 and 2, including locking member 1 and washer 2, wherein locking member 1 is oblate columnar structures, and the periphery of locking member 1 is equipped with external screw thread 3, and sets on the top end face of locking member 1 There is the interior hexagonal for screwing to twist slot 4, bottom face is equipped with lug boss 5, forms land 6, protrusion between lug boss 5 and bottom face The end face 7 in portion 5 is equipped with the inner groovy 9 for being limited to needle 8.

Needle 8 is equipped with ring muscle 10, and the top of ring muscle 10 is equipped with for the mating end 11 in inner groovy 9 to be coupled.

Piston 12 is equipped with loading chute room 13, and the bottom of loading chute room 13 is equipped with the through-hole 14 passed through for needle 8.

Washer 2 is set to the bottom of loading chute room 13, and one end of needle 8 passes through washer 2 and through-hole 14 and ring muscle 10 The top end face of bottom face and washer 2 abuts against, and is mutually threadedly coupled between locking member 1 and the cell wall of loading chute room 13, and indent Slot 9 matches with mating end 11 to be docked, and the end face of lug boss 5 and the top end face of ring muscle 10 abut against.

It specifically describes, by the way that ring muscle 10 is arranged on needle 8 and inner groovy 9 is arranged in the bottom of locking member 1, so that interior Groove 9 matches with the mating end 11 of needle 8 to be docked, and can be ensured the verticality of needle 8, be satisfied the use demand.

It is assembled and is illustrated, washer 2 is put into loading chute room 13 first, then wears the main part of needle 1 Washer 2 and through-hole 14 are crossed, so that the bottom of ring muscle 10 and the top end face of washer 2 abut against, is then revolved by die nut Locking member 1 is twisted, 1 axial displacement of locking member to mating end 11 is embedded in inner groovy 9 after screwing, 7 compression ring of end face of lug boss 5 The top end face of muscle 10, the close-fitting realized between piston 12 and needle 8 connect.

This case is optimized, gasket ring piece 15, the pad are set between the end face of lug boss 57 and the top end face of ring muscle 10 Ring plate 15 plays the role of buffering and protection.

The preferred embodiment of this case as shown in Figure 1, the periphery of washer 2 is equipped with the tubulose outer 16 towards 1 direction of locking member, The free end of tubulose outer 16 is abutted against with land 6, can be limited the axial stroke of locking member 1, be set on the inner wall of tubulose outer 16 There is cyclic annular limiting groove 17, the outer rim of gasket ring piece 15 is embedded in cyclic annular limiting groove 17.

It is designed in this way, forms cricoid confined space 18 between gasket ring piece 15, washer 2 and needle 8, the effect of sealing can be played Fruit, confined space are cavity, have barrier property, and sealing effect is superior.

For ease of mating, the outer rim of gasket ring piece 15 is arc convex, and cyclic annular limiting groove 17 is and arc convex phase The arc groove matched.

Finally, the diameter of through-hole 14 is greater than the main diameter of needle 8.The internal diameter of washer 2 is greater than the main diameter of needle 8 simultaneously And it is not less than the diameter of through-hole 14.The transverse elasticity deformation gap of needle can be provided by being designed in this way, and adapt to flow distribution plate thermal expansion pair The biasing force that needle generates prevents generation between needle 8 and through-hole 14 from contacting firmly.

By above description it can be found that the utility model is used for the bindiny mechanism of piston and needle in hot runner system, Using specific locking member, the restriction effect to needle can be played, the verticality of needle is ensured, meets accuracy requirement.Washer with The design of gasket ring piece forms cyclic annular confined space between needle, while playing buffer protection function, provides enough close Sealing property.Whole design is succinct, is easy to stablize mating between piston and needle.

The technical solution of the utility model is fully described above, it should be noted that the tool of the utility model Body embodiment is simultaneously not limited by the description set out above, and those skilled in the art exist according to the Spirit Essence of the utility model All technical solutions that structure, method or function etc. are formed using equivalents or equivalent transformation, all fall within this reality Within novel protection scope.

Claims (6)

1. the bindiny mechanism for piston and needle in hot runner system, it is characterised in that:

Including locking member and washer,

Wherein, the locking member is oblate columnar structures, and the periphery of the locking member is equipped with external screw thread, and the locking member Top end face is equipped with the interior hexagonal for screwing and twists slot, and bottom face is equipped with lug boss, shape between the lug boss and bottom face At land, the end face of the lug boss is equipped with the inner groovy for being limited to the needle,

The needle is equipped with ring muscle, and the top of the ring muscle is equipped with for the mating end in the inner groovy to be coupled,

The piston is equipped with loading chute room, and the bottom of the loading chute room is equipped with the through-hole passed through for the needle,

The washer is set to the bottom of the loading chute room, and one end of the needle passes through the washer and the through-hole, simultaneously And the top end face of the bottom face and the washer of the ring muscle abuts against, between the locking member and the cell wall of the loading chute room It is mutually threadedly coupled, the inner groovy matches with the mating end to be docked, the top of the end face of the lug boss and the ring muscle Face abuts against.

2. the bindiny mechanism for piston and needle in hot runner system according to claim 1, it is characterised in that: described convex Gasket ring piece is equipped between the end face in the portion of rising and the top end face of the ring muscle.

3. the bindiny mechanism for piston and needle in hot runner system according to claim 2, it is characterised in that: the pad The periphery of circle is equipped with the tubulose outer towards the locking member direction, and free end and the land of the tubulose outer offset It connects, the inner wall of the tubulose outer is equipped with cyclic annular limiting groove, the outer rim insertion of the gasket ring piece cyclic annular limiting groove It is interior.

4. the bindiny mechanism for piston and needle in hot runner system according to claim 3, it is characterised in that: the pad The outer rim of ring plate is arc convex, and the ring-type limiting groove is the arc groove to match with the arc convex.

5. the bindiny mechanism for piston and needle in hot runner system according to claim 1, it is characterised in that: described logical The diameter in hole is greater than the main diameter of the needle.

6. the bindiny mechanism for piston and needle in hot runner system according to claim 5, it is characterised in that: the pad The internal diameter of circle is greater than the main diameter of the needle and is not less than the diameter of the through-hole.