CN203371736U

CN203371736U - Plastic injection mold with inner mold core having shrinking mechanism

Info

Publication number: CN203371736U
Application number: CN201320438994.6U
Authority: CN
Inventors: 张志强
Original assignee: Xiamen Jinway Mould Co Ltd
Current assignee: Xiamen Jinway Mould Co Ltd
Priority date: 2013-07-23
Filing date: 2013-07-23
Publication date: 2014-01-01
Anticipated expiration: 2023-07-23

Abstract

The utility model discloses a plastic injection mold with an inner mold core having a shrinking mechanism. The plastic injection mold comprises a fixed mold, a movable mold and an inner mold core, wherein the inner mold core comprises an inner sleeve of which the outer surface is cone-shaped, and a ring-shaped mode core connected to the outer surface of the inner sleeve; the outer surface of the ring-shaped mold core is provided with a ring-shaped bump which is matched with a ring-shaped groove of an inner hole of a product; the ring-shaped mold core is divided to be a plurality of wedge-shaped blocks in an axial direction; a dovetail-shaped bump is arranged on the inner side of each wedge-shaped block, and the outer surface of an inner sleeve is provided with a plurality of dovetail grooves which are matched with the dovetail bumps of the plurality of wedge-shaped bumps; an outer sleeve is arranged on the end face of the fixed mold; the ring-shaped mold core is inserted in the outer sleeve; the side surface of the fixed mold is connected with a bracket, an oil cylinder is fixed on the bracket, and a piston rod of the oil cylinder is connected with the inner sleeve; two sides of the ring-shaped mold core are provided with limiting grooves, and two limiting blocks matched with the limiting grooves are fixed on the movable mold. Due to the adoption of the plastic injection mold, the integral molding of the product is realized, the production period is shortened, the manufacturing cost is reduced, and the appearance quality and the precision of the inner hole of the product are improved.

Description

A kind of injection mold of inner mould core band contracting mechanism

Technical field

The utility model relates to injection mold manufacturing technology field, especially a kind of injection mold of inner mould core band contracting mechanism.

Background technology

Shown in accompanying drawing 1, be with the plastic product of annular groove 1b in a kind of endoporus 1a, in injection moulding, inner mould core must have an annular protrusion adapted with annular groove 1b, due to the existence of inner mould core annular protrusion, after product adopts integrated injection molding, inner mould core just can't the demoulding.Therefore traditional production method need to be the injection moulding of production sharing two halves, and then the integrally welded product of method welded for the product of two halves.This traditional production method, the production cycle is longer, and manufacturing cost is high, and presentation quality and the inner hole precision of product are poor simultaneously.

The utility model content

The technical problems to be solved in the utility model is to provide a kind of injection mold of inner mould core band contracting mechanism, has realized the one-body molded of product, shortens the production cycle, reduces manufacturing cost, has improved presentation quality and the inner hole precision of product.

For achieving the above object, the technical solution of the utility model is: a kind of injection mold of inner mould core band contracting mechanism, comprise cover half, dynamic model, inner mould core, inner mould core comprises that an outer surface is conical inner sleeve, be connected to the annular core rod of inner sleeve conical external surface, the circular die core outer surface is provided with the annular protrusion adapted with product endoporus annular groove, described annular core rod is divided into a plurality of wedges vertically, the inboard of each wedge is provided with the swallow-tail form projection, described inner sleeve conical external surface is provided with a plurality of dovetail grooves and matches with the swallow-tail form projection of a plurality of wedges, one overcoat is set on the end face of cover half, and described annular core rod is through outer putting, the side of cover half connects a support, is fixed with oil cylinder on support, and the piston rod of oil cylinder is connected with described inner sleeve.

Preferred described annular core rod is divided into 12 wedges vertically.Further preferably, described 12 wedges are comprised of four the first wedges, four the second wedges, four the 3rd wedges.To facilitate the manufacture of annular core rod.

Further improve, described the first wedge rear end radially is extended with guide protrusions, and described overcoat rear end face is provided with four direction recess and matches with the guide protrusions of four the first wedge rear ends.Make movement and the return precision of four the first wedges more reliable.

Further improve, described annular core rod both sides radially are provided with limited impression, are fixed with two limited blocks on dynamic model and match with described limited impression.Dynamic model drives on the limited impression that two limited blocks are stuck in annular core rod both sides in the time of can preventing the product injection moulding during matched moulds like this, and injection pressure backs down annular core rod.

The utility model is conical inner sleeve because inner mould core comprises an outer surface, be connected to the annular core rod of inner sleeve conical external surface, and inner sleeve is connected with the piston rod of oil cylinder and is driven and moved around by oil cylinder; And annular core rod is divided into a plurality of wedges vertically, the inboard of each wedge is provided with the swallow-tail form projection, and described inner sleeve conical external surface is provided with a plurality of dovetail grooves and matches with the swallow-tail form projection of a plurality of wedges; Like this when inner sleeve retreats, a plurality of wedges are provided with in the inner sleeve conical external surface can be toward middle retraction under the effect of a plurality of dovetail grooves, just can with the product endoporus in annular groove be separated, realize the one-body molded of product, thereby shorten the production cycle, reduce manufacturing cost, improve again presentation quality and the inner hole precision of product simultaneously.

The accompanying drawing explanation

Fig. 1 is a kind of plastic product stereogram of endoporus band annular groove;

Fig. 2 is the utility model stereogram;

Fig. 3 is the top view of Fig. 2;

Fig. 4 is the A-A cutaway view of Fig. 3;

Fig. 5 is the utility model inner sleeve stereogram;

Fig. 6 is the utility model annular core rod stereogram;

Fig. 7 is looping core rod the first wedge stereogram;

Fig. 8 is looping core rod the second wedge stereogram;

Fig. 9 is looping core rod the 3rd wedge stereogram;

Figure 10 is the annular core rod stereogram that matches with inner sleeve and two limited blocks;

Figure 11 is the utility model overcoat stereogram.

The specific embodiment

Below in conjunction with accompanying drawing and concrete embodiment, the utility model is described in further detail.

Shown in Fig. 1 to Figure 11, a kind of injection mold of inner mould core band contracting mechanism, comprise cover half 10, dynamic model 20, inner mould core 1, inner mould core 1 comprises that an outer surface is conical inner sleeve 11, be connected to the annular core rod 12 of inner sleeve 11 conical external surface, annular core rod 12 outer surfaces are provided with the annular protrusion 12a adapted with product endoporus annular groove 1b, described annular core rod 12 is divided into 12 wedges vertically, 12 wedges are by four the first wedges 121, four the second wedges 122, four the 3rd wedges 123 form, the inboard of each the first wedge 121 is provided with swallow-tail form projection 1211, the inboard of each the second wedge 122 is provided with swallow-tail form projection 1221, the inboard of each the 3rd wedge 123 is provided with swallow-tail form projection 1231, described inner sleeve 11 conical external surface are provided with the swallow-tail form projection 1211 of the inboard of 12 dovetail grooves 111 and four the first wedges 121, the swallow-tail form projection 1231 of 1221 and four the 3rd wedge 123 inboards of swallow-tail form projection of four the second wedge 122 inboards matches,

One overcoat 2 is set on the end face of cover half 10, and described annular core rod 12 is through on overcoat 2;

The side of cover half 10 connects a support 3, is fixed with oil cylinder 4 on support 3, and oil cylinder 4 also available oil cylinder substitutes, and the piston rod of oil cylinder 4 is connected with inner sleeve 11;

Radially be extended with guide protrusions 1212 in the first wedge 121 rear ends, described overcoat 2 rear end faces are provided with four direction recess 21 and match with the guide protrusions 1212 of four the first wedge 121 rear ends.

Radially be provided with limited impression 12b in annular core rod 12 both sides, be fixed with two limited blocks 5 on dynamic model 20 and match with described limited impression 12b.Described limited impression 12b can be arranged on the outer surface of the 3rd wedge 123.

During the utility model injection moulding, inner mould core 1 is in the state as Figure 11, after completing injection moulding, oil cylinder 4 drives inner sleeve 11 and retreats, under the effect of four the first wedges 121 of looping core rod 12, four the second wedge 122, four 12 dovetail grooves 111 that the 3rd wedge 123 just is provided with in inner sleeve 11 conical external surface, toward middle, shrink, annular core rod 12 has just broken away from the demoulding with product and has moved.Realize the integrally formed of product.

Be only below preferred embodiment of the utility model, the change that those skilled in the art does to be equal to by claim all falls into the protection domain of this case.

Claims

1. the injection mold of an inner mould core band contracting mechanism, comprise cover half, dynamic model, inner mould core, it is characterized in that: inner mould core comprises that an outer surface is conical inner sleeve, is connected to the annular core rod of inner sleeve conical external surface, the circular die core outer surface is provided with the annular protrusion adapted with product endoporus annular groove, described annular core rod is divided into a plurality of wedges vertically, the inboard of each wedge is provided with the swallow-tail form projection, and described inner sleeve conical external surface is provided with a plurality of dovetail grooves and matches with the swallow-tail form projection of a plurality of wedges; One overcoat is set on the end face of cover half, and described annular core rod is through outer putting; The side of cover half connects a support, is fixed with oil cylinder on support, and the piston rod of oil cylinder is connected with described inner sleeve.

2. the injection mold of a kind of inner mould core band contracting mechanism according to claim 1, it is characterized in that: described annular core rod is divided into 12 wedges vertically.

3. the injection mold of a kind of inner mould core band contracting mechanism according to claim 2, it is characterized in that: described 12 wedges are comprised of four the first wedges, four the second wedges, four the 3rd wedges.

4. the injection mold of a kind of inner mould core band contracting mechanism according to claim 3, it is characterized in that: described the first wedge rear end radially is extended with guide protrusions, and described overcoat rear end face is provided with four direction recess and matches with the guide protrusions of four the first wedge rear ends.

5. according to the injection mold of the described a kind of inner mould core band contracting mechanism of claim 1 to 4 any one, it is characterized in that: described annular core rod both sides radially are provided with limited impression, are fixed with two limited blocks on dynamic model and match with described limited impression.