CN103447467A - Method for cleaning metal mould - Google Patents

Abstract

The invention relates to a method for cleaning a metal mould. The method for cleaning the metal mould is characterized by comprising the following steps of (1) selecting round-rod-shaped dry ice with the length of 3-6mm and the diameter of 2.5-3.5mm, and adding the dry ice into an ice hopper of a dry ice cleaning machine; (2) enabling a gun nozzle of the dry ice cleaning machine to be vertical to a surface, to be cleaned, of a mould and enabling the distance between the gun nozzle and the surface to be cleaned to be 30-50mm, and spraying the dry ice to clean the surface to be cleaned, wherein the ice discharge rate is 1.0-1.5kg/min, the spraying pressure is 7-8bar and the cleaning speed is 0.14-0.18s/cm<2>. The method for cleaning the metal mould has the advantages that the dry ice sprayed during dry ice cleaning can be gasified after being contacted with air, the environment of a workshop is obviously improved, less dust is produced, so that the operating environment of the workshop is improved; the dry ice is used for sand blasting, hardness of the dry ice is low, and loss of a mould caused by the dry ice is less than that of the condition that waste sand is used for sand blasting, so that service life of the mould can be prolonged; a trimming burr of a product produced by adopting a dry ice cleaning mould is smaller than that of the product produced by adopting a waste sand cleaning mould, so that workload of the next process is reduced, and the service life of an abrasive belt rasp is prolonged.

Description

The method of cleaning metal type dies

Technical field

The present invention relates to a kind of method of clearing up metal type dies, before especially a kind of mould production is reached the standard grade, the cleaning of die cavity greasy dirt, dope layer, belong to gravity-assist pouring device technique field.

Background technology

In prior art, the greasy dirt be coated with in the time of mould will being maintained before the metal type dies cast or the foreign material of other adhesions are cleaned out, the coating particularly sprayed in mold cavity, what use at present is that antiquated sand and sand rifle dry after heat treatment carries out abrasive jet cleaning to mold cavity face and die joint.The use said method has the following disadvantages: when (1) is used heat treatment antiquated sand cleaning mould, and workshop sand dust all over the sky, it is sand that the workman has been sprayed the sand whole body, unfavorable to health for a long time; (2) spray not easy cleaning of sandy ground face, only swept and must take a period of time, be unfavorable for scene " 5S field pipes logos "; (3) clear up mould with antiquated sand for a long time, mould is easy to wearing and tearing, increases the generation of product burr, indirectly increases the workload of later process; (4), while using antiquated sand to carry out the abrasive jet cleaning mould, grit also easily falls into electric elements, easily damages electric elements.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, a kind of method of clearing up metal type dies be provided, can improve on-the-spot working environment, while reducing the cleaning mould to the wearing and tearing of mould, greatly save the mold cleaning time.

According to technical scheme provided by the invention, a kind of method of clearing up metal type dies, feature is to comprise the following steps:

(1) choosing length is the pole shape dry ice that 3 ~ 6mm, diameter are 2.5 ~ 3.5mm, dry ice is joined in the glacial cirque of dry ice cleaner;

(2) to be cleaned perpendicular to mould by the rifle mouth of dry ice cleaner, to be cleaned 30 ~ 50mm of rifle mouth distance, treat cleaning surface injection dry ice and cleaned, and going out the ice amount is 1.0 ~ 1.5kg/min, expulsion pressure is 7～8bar, and cleaning speed is 0.14～0.18 second/cm ².

The present invention compared with prior art has the following advantages: the dry ice that dry ice when cleaning sprays with can gasify after air contacts, to the improve significantly generation of minimizing dust of workshop condition, improved the plant operations environment; Use the dry ice sandblast, because the low loss meeting to mould of hardness ratio of dry ice is well more a lot of than the situation with the antiquated sand spray, can extend die life; It is less than the product burr that uses antiquated sand cleaning mould to produce to use dry ice cleaning mould, alleviates the later process workload, increases the service life that cutter is frustrated in abrasive band; Alleviate core setter pourer's operating pressure.

The specific embodiment

Below in conjunction with specific embodiment, the invention will be further described.

Embodiment mono-: a kind of method of clearing up metal type dies comprises the following steps:

(1) choosing length is the pole shape dry ice that 3mm, diameter are 2.5mm, dry ice is joined in the glacial cirque of dry ice cleaner;

(2) to be cleaned perpendicular to mould by the rifle mouth of dry ice cleaner, to be cleaned 30mm of rifle mouth distance, treat cleaning surface injection dry ice and cleaned, and going out the ice amount is 1.5kg/min, and expulsion pressure is 7bar, and cleaning speed is 0.14 second/cm ²; Having cleared up the mould elapsed time is 2.58min, consumes dry ice 3.87kg.

Embodiment bis-: a kind of method of clearing up metal type dies comprises the following steps:

(1) choosing length is the pole shape dry ice that 6mm, diameter are 3.5mm, dry ice is joined in the glacial cirque of dry ice cleaner;

(2) to be cleaned perpendicular to mould by the rifle mouth of dry ice cleaner, to be cleaned 50mm of rifle mouth distance, treat cleaning surface injection dry ice and cleaned, and going out the ice amount is 1.5kg/min, and expulsion pressure is 8bar, and cleaning speed is 0.18 second/cm ²; Having cleared up the mould elapsed time is 3min, consumes dry ice 4.5kg.

Embodiment tri-: a kind of method of clearing up metal type dies comprises the following steps:

(1) choosing length is the pole shape dry ice that 5mm, diameter are 3mm, dry ice is joined in the glacial cirque of dry ice cleaner;

(2) to be cleaned perpendicular to mould by the rifle mouth of dry ice cleaner, to be cleaned 40mm of rifle mouth distance, treat cleaning surface injection dry ice and cleaned, and going out the ice amount is 1.3kg/min, and expulsion pressure is 7.5bar, and cleaning speed is 0.15 second/cm ²; Having cleared up the mould elapsed time is 2.8min, consumes dry ice 3.64kg.

Claims (1)

1. a method of clearing up metal type dies, is characterized in that, comprises the following steps:

(1) choosing length is the pole shape dry ice that 3 ~ 6mm, diameter are 2.5 ~ 3.5mm, dry ice is joined in the glacial cirque of dry ice cleaner;

(2) to be cleaned perpendicular to mould by the rifle mouth of dry ice cleaner, to be cleaned 30 ~ 50mm of rifle mouth distance, treat cleaning surface injection dry ice and cleaned, and going out the ice amount is 1.0 ~ 1.5kg/min, expulsion pressure is 7～8bar, and cleaning speed is 0.14～0.18 second/cm ².