CN208483175U

CN208483175U - A kind of core mould structure of the subsidiary main sample cylinder of permeability test

Info

Publication number: CN208483175U
Application number: CN201820863200.3U
Authority: CN
Inventors: 纪汉成; 张建华
Original assignee: Liyang City Lianhua Machinery Manufacturing Co Ltd
Current assignee: Liyang City Lianhua Machinery Manufacturing Co Ltd
Priority date: 2018-06-05
Filing date: 2018-06-05
Publication date: 2019-02-12
Anticipated expiration: 2028-06-05

Abstract

The utility model discloses a kind of core mould structures of subsidiary main sample cylinder of permeability test, including determining core box and dynamic core box, the inner cavity for determining core box is inlaid with main sample cylinder loose piece, the main sample cylinder loose piece has swivel nut, the main sample cylinder has external screw thread, the main sample cylinder loose piece bottom for determining core box is equipped at least one venting plug, the main sample cylinder loose piece bottom for determining core box is equipped at least two mandril, the corresponding main sample cylinder loose piece center of the dynamic core box, which is equipped with, penetrates Sha Kou, it is described when determining core box and dynamic core box and molding, form the type chamber to match with the specimen shape of required production.The main sample cylinder core mould, subsidiary structure is simple on the hot core box mould or cold box die of production sand core, easy to operate, improves the sample preparation efficiency of shell mould permeability test sample, at low cost.

Description

A kind of core mould structure of the subsidiary main sample cylinder of permeability test

Technical field

The utility model belongs to technical field of material formation, and in particular to a kind of core box of the subsidiary main sample cylinder of permeability test Mould structure.

Background technique

Molding sand and core sand used in shell mold process at present mainly has the hardened sands such as various precoated sands, cold core sand.By Larger in type (core) sand gas forming amount of precoated sand, cold core sand, gas permeability generates gas porosity, cold shut defective effect extremely to casting Close important, the gas permeability of type (core) sand itself has bigger influence for the exhaust capacity of type (core) sand.Using precoated sand, cold Core sand shell moulded casting labyrinth components, such as automobile turbocharger volute, middle case, motor cylinder block, oil pressure valve etc., if Shell mould type (core) sand poor air permeability, exhaust capacity is poor, and casting will generate stomata, cold shut defect.There are also inhaled using shell mould vacuum The gas permeability of casting process, shell mould has a great impact to the mold-filling capacity of the quick foundation and casting of inhaling casting vacuum degree, direct shadow It rings and inhales casting casting quality.Therefore there is important guidance for the detection of shell moulded casting molding and core making precoated sand, cold core sand gas permeability Meaning.

The gas permeability detection of moulding tide mould sand has become an important routine inspection project at present, but for precoated sand, The detection of cold core sand permeability is seldom.There is a kind of special detection dry state hardened sand with inflation O-ring ventilative in the prior art The sample cylinder of property, needs first to make sample dry state hardened sand sample is then put into gas-flow closure in sample cylinder and carry out gas permeability examination again It tests, it is relatively complicated, and the production of hardened sand sample needs special sampling machine, it is at high cost.Now invention designs a kind of novel breathe freely Property the test sample cylinder and main sample cylinder of integral type dry state hardened sand sample, the main sample cylinder of sample is placed in the hot box mould of production sand core It is subsidiary that the main sample cylinder with sample is made in tool, cold box die.Therefore it needs to change existing production core mold structure Into the requirement of main sample cylinder is tested in satisfaction production.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, change to existing production core mold structure Into providing a kind of core mould structure of subsidiary main sample cylinder of permeability test.

In order to achieve the above objectives, the technology employed by the present utility model is including determining core box and dynamic core box, feature Be: the inner cavity for determining core box is inlaid with main sample cylinder loose piece, and the main sample cylinder loose piece has swivel nut, and the main sample cylinder is with outer Screw thread, the main sample cylinder loose piece bottom for determining core box are equipped at least one venting plug, the main sample cylinder loose piece bottom for determining core box Equipped at least two mandril, the corresponding main sample cylinder loose piece center of the dynamic core box, which is equipped with, penetrates Sha Kou, described determine core box and the conjunction of dynamic core box When mould, the type chamber to match with the specimen shape of required production is formed.

Preferably, the main sample cylinder loose piece and the fit clearance for determining core box inner cavity are 0.2~0.3mm.

Preferably, the inner wall weight of the place-centric of the main sample cylinder loose piece bottom setting mandril for determining core box and main sample cylinder It closes.

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

The utility model improves existing production core mold structure, and it is subsidiary in production sand will to test main sample cylinder loose piece The hot core box mould or cold box die of core are determined in core box, and the main sample cylinder with sample is made.The main sample tube filler box mould structure, Structure is simple, easy to operate, improves the sample preparation efficiency of shell mould permeability test sample, at low cost.

Detailed description of the invention

Attached drawing 1 is a kind of structural schematic diagram of the core mould structure of the subsidiary main sample cylinder of permeability test of the utility model；

Attached drawing 2 is that Fig. 1 determines core box top view；

Attached drawing 3 is novel specimen barrel structure schematic diagram.

Wherein, 1-determines core box；2-dynamic core boxes；3-main sample cylinders；4-swivel nuts；5-samples；6-venting plugs；7-penetrate sand Mouthful；8-mandrils；9-divide box face；10-novel specimen cylinders.

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.

Referring to Fig.1, Fig. 2, Fig. 3, the utility model provide a kind of technical solution: level divides box face 9 die for making core, including fixed Core box 1 and dynamic core box 2, the inner cavity for determining core box 1 are inlaid with main 3 loose piece of sample cylinder, and main 3 loose piece of sample cylinder has swivel nut 4, institute Main sample cylinder 3 is stated with external screw thread, main 3 bottom of sample cylinder for determining core box 1 is equipped with 2 12 × 7.5mm of Ф venting plugs 6, described fixed The 3 loose piece bottom of main sample cylinder of core box 1 is equipped with 2 Ф 8mm mandrils 8, and the corresponding main 3 loose piece center of sample cylinder of the dynamic core box 2 is equipped with Penetrate sand mouth 7, it is described to determine core box 1 and when dynamic core box 2 molds, form the type chamber to match with the specimen shape of required production.

It is 0.2~0.3mm that main 3 loose piece of sample cylinder, which is controlled, with the fit clearance for determining 1 inner cavity of core box, convenient to take out from core box.

The place-centric for determining 3 loose piece bottom of the main sample cylinder setting mandril 8 of core box 1 is overlapped with the inner wall of main sample cylinder 3, convenient for top Main 3 loose piece of sample cylinder and sample 5 out.

The osculum diameter of novel specimen cylinder 10 is Ф 50mm, and excircle dimension is Ф 60mm；Big mouth diameter internal screw thread be M60 × 2mm, excircle dimension are Ф 70mm, total height 85mm.

The internal orifice diameter of main sample cylinder 3 is Ф 50mm, and it is highly 50mm that excircle dimension, which is Ф 60mm, and wherein external screw thread is M60 × 2mm, external thread length 20mm.

Sample 5 50 ± 1mm of Ф using national standard, 50 ± 1mm of height in main sample cylinder 3.

Sand coremaking is penetrated, main 3 loose piece of sample cylinder with precoated sand or cold core sand is taken out from die for making core, spins off swivel nut 4, Main sample cylinder 3 is tightened in novel specimen cylinder 10, and test specimen tube is locked in the rubber of direct-reading or intelligent permeability meter It fills on sample holder, measures precoated sand gas permeability data.

The core mould structure of the subsidiary main sample cylinder of permeability test, structure is simple, easy to operate, 5 cost of manufacture of sample Low, precoated sand or cold core sand sample 5 are combined closely with main 3 inner wall of sample cylinder in integral type test specimen tube, and air-tightness is good, permeability test Favorable reproducibility, accuracy are high.

Claims

1. a kind of core mould structure of the subsidiary main sample cylinder of permeability test, including determine core box (1) and dynamic core box (2), feature Be: the inner cavity for determining core box (1) is inlaid with main sample cylinder (3) loose piece, and main sample cylinder (3) loose piece has swivel nut (4), described Main sample cylinder (3) has external screw thread, and main sample cylinder (3) the loose piece bottom for determining core box (1) is equipped at least one venting plug (6), institute It states and determines main sample cylinder (3) the loose piece bottom of core box (1) and be equipped at least two mandril (8), the corresponding main sample cylinder of the dynamic core box (2) (3) loose piece center be equipped with penetrate Sha Kou (7), it is described determine core box (1) and dynamic core box (2) molding when, formation and required production sample The type chamber that shape matches.

2. a kind of core mould structure of the subsidiary main sample cylinder of permeability test according to claim 1, it is characterised in that: described Main sample cylinder (3) loose piece is 0.2~0.3mm with the fit clearance for determining core box (1) inner cavity.

3. a kind of core mould structure of the subsidiary main sample cylinder of permeability test according to claim 1, it is characterised in that: described The place-centric for determining main sample cylinder (3) loose piece bottom setting mandril (8) of core box (1) is overlapped with the inner wall of main sample cylinder (3).