CN202343856U

CN202343856U - Cylinder body water jacket sand core die of automobile engine

Info

Publication number: CN202343856U
Application number: CN2011203903810U
Authority: CN
Inventors: 丛远刚
Original assignee: NINGBO GAOSHENG MOULD MANUFACTURE CO Ltd
Current assignee: NINGBO GAOSHENG MOULD MANUFACTURE CO Ltd
Priority date: 2011-10-14
Filing date: 2011-10-14
Publication date: 2012-07-25
Anticipated expiration: 2021-10-14

Abstract

The utility model discloses a cylinder body water jacket sand core die of an automobile engine. The die comprises a bottom frame, an upper core box, a lower core box, a core jacking rod, a core jacking plate and a sand injecting mechanism, wherein a cylinder body water jacket sand core cavity is arranged between the upper core box and the lower core box; the upper end surface of the core jacking rod is aligned with the bottom of the cylinder body water jacket sand core cavity; the lower end of the core jacking rod is fixedly connected with the core jacking plate; the core jacking rod is provided with a central hole; a jacking needle is in clearance fitting in the central hole of the core jacking rod; the upper part of the jacking needle is positioned in the cylinder body water jacket sand core cavity; the lower end of the jacking needle is fixedly connected to a fixing plate of the a bottom frame; the upper part of the jacking needle is conical, i.e. the upper part of the jacking needle is smaller than the lower part of the jacking needle; the upper part of the jacking needle sequentially comprises a first section, a second section and a third section from top to bottom; the conical degree of the first section is less than that of the second section; the conical degree of the second section is less than that of the third section; and the diameter of the lower end of the third section is more than that of a screw used for fixing a sand core.

Description

The cylinder body water jacket core mold of automobile engine

Technical field

The utility model relates to automobile engine cylinder-body water jacket production technical field, specifically is a kind of cylinder body water jacket core mold of automobile engine.

Background technology

The automobile engine cylinder-body sand core of water jacket mould of prior art; Its structure generally comprises underframe, following core box, goes up core box and penetrate sand mechanism; Described going up between core box and the following core box is provided with cylinder body water jacket core die cavity, and said core box down is provided with the following plunger tip bar of sand core of water jacket.When carrying out the cast blocks water jacket with the cylinder body water jacket core; Need with screw stationary housing sand core of water jacket; The cylinder body water jacket core that the automobile engine cylinder-body sand core of water jacket die production of prior art is come out is not reserved the tap hand-hole; When screw is shot in the cylinder body water jacket core, can be from the tap hand-hole knockout downwards, thereby cause the cylinder body water jacket core fixing not firm; Moreover, and be easy to cause core to break because the automobile engine cylinder-body sand core of water jacket is a kind of thin-wall product, make the cylinder body water jacket core imperfect, even situation such as fracture.

The utility model content

The technical problem that the utility model will solve is; Overcome the defective of above prior art; Provide a kind of cylinder body water jacket core that makes to have the tap of reservation hand-hole, and the tap hand-hole of this reservation can make the cylinder body water jacket core mold of the automobile engine of cylinder body water jacket core fixation.

The technical solution of the utility model is; A kind of cylinder body water jacket core mold with automobile engine of following structure is provided: it comprises underframe, last core box, following core box, plunger tip bar, plunger tip plate and penetrates sand mechanism; Said going up between core box and the following core box is provided with cylinder body water jacket core die cavity, and the upper surface of said plunger tip bar is equal with cylinder body water jacket core cavity bottom, and the lower end of plunger tip bar is fixedly connected with the plunger tip plate; Described plunger tip bar is the plunger tip bar that has centre bore; The centre bore internal clearance of said plunger tip bar cooperates a thimble, and the top of said thimble is positioned at cylinder body water jacket core die cavity, and the lower end of thimble is fixedly connected on the fixed head of underframe; The top of said thimble is up-small and down-big taper; And the top of thimble comprises first section, second section and the 3rd section from top to bottom in proper order; Said first section tapering is less than second section tapering; Second section tapering is less than the 3rd section tapering, and the 3rd section lower end diameter is greater than the fixing diameter of the screw of core.

After adopting above structure, the cylinder body water jacket core mold of the utility model automobile engine compared with prior art has the following advantages: the cylinder body water jacket core mold of this automobile engine is when the plunger tip plate upwards drives the plunger tip masthead and plays the cylinder body water jacket core; Cylinder body water jacket core bottom breaks away from thimble top, thus the tap hand-hole that under reserving on the cylinder body water jacket core, matches with thimble shaped upper part and size, and this tap hand-hole is with screw stationary housing sand core of water jacket the time; Can make things convenient for screw to shoot, like this with regard to not causing core to break or making situation such as the cylinder body water jacket core is imperfect, fracture, when the stationary housing sand core of water jacket; Guaranteed the complete of core; In addition, because the top of thimble comprises first section, second section and the 3rd section from top to bottom in proper order, said first section tapering is less than second section tapering; Second section tapering is less than the 3rd section tapering; And the 3rd section lower end diameter is greater than the fixing diameter of the screw of core, and after thimble broke away from the cylinder body water jacket core, the tap hand-hole of reserving on the cylinder body water jacket core also was divided into the three different sector holes of tapering that match with thimble top so; The following sector hole of this three sector hole can make things convenient for the screw location; And the molding sand that screw drops in the tap hand-hole when tightening also can drop in the following sector hole, and can in the hole, not spill, thereby has guaranteed the fix tightly solidity of cylinder body water jacket core.

Description of drawings

Fig. 1 is the partial structurtes sketch map of the cylinder body water jacket core mold of the utility model automobile engine.

Fig. 2 is the structural representation on thimble top of the cylinder body water jacket core mold of the utility model automobile engine.

As shown in the figure:

1, go up core box, 2, core box down, 3, cylinder body water jacket core die cavity, 4, the plunger tip bar, 5, thimble, 6, the plunger tip plate, 7, fixed head, 8, first sections, 9, second sections, 10, the 3rd sections.

The specific embodiment

Below in conjunction with the accompanying drawing and the specific embodiment the utility model is done further detailed explanation.

It is as depicted in figs. 1 and 2,

The cylinder body water jacket core mold of the utility model automobile engine; It comprises underframe, last core box 1, following core box 2, plunger tip bar 4, plunger tip plate 6 and penetrates sand mechanism; Said going up between core box 1 and the following core box 2 is provided with cylinder body water jacket core die cavity 3, and the upper surface of said plunger tip bar 4 is equal with cylinder body water jacket core die cavity 3 bottoms, and the lower end of plunger tip bar 4 is fixedly connected with plunger tip plate 6; Described plunger tip bar 4 is for having the plunger tip bar 4 of centre bore; The centre bore internal clearance of said plunger tip bar 4 cooperates a thimble 5, and the top of said thimble 5 is positioned at cylinder body water jacket core die cavity 3, and the lower end of thimble 5 is fixedly connected on the fixed head 7 of underframe; The top of said thimble 5 is up-small and down-big taper; And the top of thimble 5 comprises first section 8, second sections 9 and the 3rd sections 10 from top to bottom in proper order; Said first section 8 tapering is less than second section 9 tapering; Second section 9 tapering is less than the 3rd section 10 tapering, and the 3rd section 10 lower end diameter is greater than the diameter of the screw that is used for fixing core.

Claims

1. the cylinder body water jacket core mold of an automobile engine; It comprises underframe, last core box (1), following core box (2), plunger tip bar (4), plunger tip plate (6) and penetrates sand mechanism; Said going up between core box (1) and the following core box (2) is provided with cylinder body water jacket core die cavity (3); The upper surface of said plunger tip bar (4) is equal with cylinder body water jacket core die cavity (3) bottom; The lower end of plunger tip bar (4) is fixedly connected with plunger tip plate (6), it is characterized in that: described plunger tip bar (4) is for having the plunger tip bar (4) of centre bore, and the centre bore internal clearance of said plunger tip bar (4) cooperates a thimble (5); The top of said thimble (5) is positioned at cylinder body water jacket core die cavity (3), and the lower end of thimble (5) is fixedly connected on the fixed head (7) of underframe; The top of said thimble (5) is up-small and down-big taper; And the top of thimble (5) comprises first section (8), second section (9) and the 3rd section (10) from top to bottom in proper order; The tapering of said first section (8) is less than the tapering of second section (9); The tapering of second section (9) is less than the tapering of the 3rd section (10), and the upper end diameter of the 3rd section (10) is greater than the fixing diameter of the screw of core.