CN205763635U - A kind of hollow bolt clearance type core core box exhaust structure - Google Patents

A kind of hollow bolt clearance type core core box exhaust structure Download PDF

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Publication number
CN205763635U
CN205763635U CN201620481203.1U CN201620481203U CN205763635U CN 205763635 U CN205763635 U CN 205763635U CN 201620481203 U CN201620481203 U CN 201620481203U CN 205763635 U CN205763635 U CN 205763635U
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China
Prior art keywords
core box
core
hollow bolt
exhaust
box
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CN201620481203.1U
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Chinese (zh)
Inventor
谢延春
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Dalian Huilong Piston Ltd By Share Ltd
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Dalian Huilong Piston Ltd By Share Ltd
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Priority to CN201620481203.1U priority Critical patent/CN205763635U/en
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Abstract

A kind of hollow bolt clearance type core core box exhaust structure, belongs to the frock technical field of casting core.This hollow bolt clearance type core core box exhaust structure includes lower core box and hollow bolt, first core box die bed face of lower core box is formed around screwed hole, the thread head of hollow bolt is with the gap air discharge duct of multiple 0.2 0.3mm and the second core box die bed face, after hollow bolt is threaded into hole, at the bottom of second core box die bed face and the first core box, positive constitutes the die cavity of complete lower core box, and the die cavity through the slit air discharge duct of lower core box and bolt-center hole are through with air.This core core box exhaust structure simple in construction, technique is simple, can standardization;Good exhaust effect, core is complete, closely knit, improves surface quality;Do not affect core box precision, it is adaptable to all kinds core core box narrow regions aerofluxus.

Description

A kind of hollow bolt clearance type core core box exhaust structure
Technical field
This utility model relates to a kind of hollow bolt clearance type core core box exhaust structure, belongs to the frock technical field of casting core.
Background technology
Core core box needs aerofluxus when coremaking, and conventional exhaust structure is typically by processing air discharge duct on die joint, and the modes such as plunger tip bar, venting plug that add in die cavity realize.But some core box comprises complicated and narrow and small die cavity, it is impossible to solve by the way of adding plunger tip bar and venting plug.If these narrow regions are without exhaust structure, eddy current will be produced, cause core misrun and insufficient strength.
Summary of the invention
In order to overcome problems of the prior art, this utility model provides a kind of hollow bolt clearance type core core box exhaust structure.This core box exhaust structure answers simple in construction, good exhaust effect, and core is complete, closely knit, improves surface quality.
The scheme that this utility model uses is: a kind of hollow bolt clearance type core core box exhaust structure, it includes lower core box, it also includes hollow bolt, first core box die bed face of described lower core box is formed around screwed hole, screwed hole is through with the first core box die bed face of lower core box, the thread head of described hollow bolt is with the gap air discharge duct of multiple 0.2-0.3mm and the second core box die bed face, gap air discharge duct is through with bolt-center hole, after hollow bolt is screwed into described screwed hole, at the bottom of second core box die bed face and the first core box, positive constitutes the die cavity of complete lower core box, the die cavity through the slit air discharge duct of lower core box and bolt-center hole are through with air.
The beneficial effects of the utility model are: this hollow bolt clearance type core core box exhaust structure includes lower core box and hollow bolt, first core box die bed face of lower core box is formed around screwed hole, the thread head of hollow bolt is with the gap air discharge duct of multiple 0.2-0.3mm and the second core box die bed face, after hollow bolt is threaded into hole, at the bottom of second core box die bed face and the first core box, positive constitutes the die cavity of complete lower core box, and the die cavity through the slit air discharge duct of lower core box and bolt-center hole are through with air.This core core box exhaust structure simple in construction, technique is simple, can standardization;Good exhaust effect, core is complete, closely knit, improves surface quality;Do not affect core box precision, it is adaptable to all kinds core core box narrow regions aerofluxus.
Accompanying drawing explanation
Fig. 1 is a kind of hollow bolt clearance type core core box exhaust structure schematic diagram.
Fig. 2 is the structure chart of hollow bolt.
In figure: 1, lower core box, 1a, the first core box die bed face, 2, hollow bolt, 2a, bolt-center hole, the 3, second core box die bed face, 4, gap air discharge duct.
Detailed description of the invention
Further illustrate structure of the present utility model and using method below in conjunction with the accompanying drawings.
Fig. 1,2 show a kind of hollow bolt clearance type core core box exhaust structure schematic diagram.In figure, this hollow bolt clearance type core core box exhaust structure includes lower core box 1 and hollow bolt 2, first core box die bed face 1a of lower core box 1 is formed around screwed hole, screwed hole is through with the first core box die bed face 1a of lower core box 1, the thread head of hollow bolt 2 is with the gap air discharge duct 4 of six 0.25mm and the second core box die bed face 3, gap air discharge duct 4 is through with bolt-center hole 2a, after hollow bolt 2 is threaded into hole, second core box die bed face 3 coordinates the die cavity constituting complete lower core box 1 with the first core box die bed face 1a, die cavity through the slit air discharge duct 4 and the bolt-center hole 2a of lower core box 1 are through with air.
Use above-mentioned technical scheme, hollow bolt 2 is arranged on lower core box 1 by screwed hole and fastens.Penetrate sand when filling type, although the core box die cavity on hollow bolt 2 is in the deeper and narrow and small position of core box, but owing on hollow bolt 2, core box cavity design has the gap air discharge duct 4 of six road 0.2-0.3mm, gas in core box die cavity enters air by gap air discharge duct 4, bolt-center hole 2a, and molding sand fills up rapidly core box die cavity along with compressed air.
Using said structure to have good exhaust effect, core is complete, closely knit, improves surface quality, does not affect core box precision, is suitable for all kinds core core box narrow regions aerofluxus, has simple in construction simultaneously, and technique is simple, can the advantage such as standardization.

Claims (1)

  1. null1. a hollow bolt clearance type core core box exhaust structure,It includes lower core box (1),It is characterized in that: further comprising hollow bolt (2),First core box die bed face (1a) of described lower core box (1) is formed around screwed hole,Screwed hole is through with the first core box die bed face (1a) of lower core box (1),The thread head of described hollow bolt (2) is with the gap air discharge duct (4) of multiple 0.2-0.3mm and the second core box die bed face (3),Gap air discharge duct (4) is through with bolt-center hole (2a),After hollow bolt (2) is screwed into described screwed hole,Second core box die bed face (3) coordinates the die cavity constituting complete lower core box (1) with the first core box die bed face (1a),Die cavity through the slit air discharge duct (4) and bolt-center hole (2a) of lower core box (1) are through with air.
CN201620481203.1U 2016-05-25 2016-05-25 A kind of hollow bolt clearance type core core box exhaust structure Active CN205763635U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620481203.1U CN205763635U (en) 2016-05-25 2016-05-25 A kind of hollow bolt clearance type core core box exhaust structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620481203.1U CN205763635U (en) 2016-05-25 2016-05-25 A kind of hollow bolt clearance type core core box exhaust structure

Publications (1)

Publication Number Publication Date
CN205763635U true CN205763635U (en) 2016-12-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201620481203.1U Active CN205763635U (en) 2016-05-25 2016-05-25 A kind of hollow bolt clearance type core core box exhaust structure

Country Status (1)

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CN (1) CN205763635U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109351915A (en) * 2018-11-02 2019-02-19 西峡县众德汽车部件有限公司 A method of improving sand core quality

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109351915A (en) * 2018-11-02 2019-02-19 西峡县众德汽车部件有限公司 A method of improving sand core quality

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