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Injection molding machine hydraulic oil circulation type fixed template casting process

A casting process and a fixed formwork technology, which is applied in the field of the hydraulic oil internal circulation fixed formwork casting process of an injection molding machine, can solve the problems of poor surface quality of the hydraulic oil internal circulation fixed formwork, poor cleanliness of the inner wall of a pre-embedded steel pipe, and many porosity defects. , to achieve the effect of improving the finish, increasing the density, and improving the casting qualification rate

Active Publication Date: 2016-09-07
GUANGDONG BLOOMACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional sand casting process scheme is difficult to guarantee the quality compactness and uniformity requirements of the template when the oil pressure of the hydraulic oil internal circulation type is up to 30 MPa, and the technical requirements for the cleanliness and surface smoothness of the inner wall of the embedded steel pipe. The surface quality of the hydraulic oil internal circulation fixed formwork is poor, the inner wall of the embedded steel pipe is poor in cleanliness, the casting has many pores and defects, and the leakage rate of the casting reaches 40% to 50%.

Method used

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  • Injection molding machine hydraulic oil circulation type fixed template casting process
  • Injection molding machine hydraulic oil circulation type fixed template casting process

Examples

Experimental program
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Effect test

Embodiment 1

[0021] refer to figure 1 and figure 2 . The injection molding machine hydraulic oil internal circulation fixed template casting process of the present invention comprises the following steps:

[0022] a. Make the mold of the fixed formwork 1, adopt three-box shape, the three-box shape includes the upper box, the middle box and the lower box, the parting surface of the upper box and the middle box is located on the mold installation surface 11 of the fixed template, the lower box and the middle box The parting surface is located at the junction of the first side 13 and the second side 14 of the fixed template 1;

[0023] b. Pre-embed steel pipes in the upper and middle boxes, and the steel pipes correspond to the hydraulic oil passage 6 in the fixed formwork 1;

[0024] c. Set the position of the gate 3 on the lower box of step b. There are four gates 3, and they are evenly distributed around the center of the bottom surface 12 of the fixed formwork 1. The distance between ...

Embodiment 2

[0033] The injection molding machine hydraulic oil internal circulation type fixed template casting process in this embodiment is basically the same as the casting process in Example 1, the difference is that in the pouring molding process, the pouring temperature is 1350°C, the pouring time is 33s, and the pouring time is 60s. The effect achieved by this embodiment is the same as that achieved by Embodiment 1.

Embodiment 3

[0035] The injection molding machine hydraulic oil internal circulation fixed template casting process of this embodiment is basically the same as the casting process of Example 1, the difference is that in the pouring molding process, the pouring temperature is 1335°C, the pouring time is 36s, and the pouring time is 55s. The effect achieved by this embodiment is the same as that achieved by Embodiment 1.

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Abstract

The invention discloses a hydraulic oil inner circulation type fixed mold plate casting technology of an injection molding machine. The technology comprises the following steps that a mold of a fixed mold plate is manufactured, upper, middle and lower three-part molding is adopted and comprises an upper box, a middle box and a lower box, and a mold joint of the upper box and the middle box serves as a mold mounting face of the fixed mold plate; b, a steel pipe is buried in the middle box, and the steel pipe corresponds to a hydraulic oil path in the fixed mold plate; c, sprue positions are arranged on the lower box in the step b, sprues are formed in the bottom face of the fixed mold plate, exhaust dead heads and an exhaust path are formed, the exhaust dead heads are formed in the upper box, and the exhaust path is communicated with the upper box and the middle box; d, casting forming is carried out, the upper box in the step c is arranged upwards and the lower box in the step c is arranged downwards to be casted, and the casting temperature ranges from 1320 DEG C to 1350 DEG C. The hydraulic oil inner circulation type fixed mold plate casting technology of the injection molding machine has the advantages of being good in material uniformity, high in tissue density, good in surface quality and high in casting yield.

Description

technical field [0001] The invention belongs to a molding process of a fixed template of an injection molding machine, in particular to a casting process of a hydraulic oil internal circulation type fixed template of an injection molding machine. Background technique [0002] The traditional casting process of the existing injection molding machine hydraulic oil internal circulation type fixed template ductile iron parts usually adopts the traditional pouring position where the mold installation surface of the fixed template is facing down. Sand casting process plan with temperature 1370℃~1400℃. This traditional sand casting process scheme is difficult to guarantee the quality compactness and uniformity requirements of the template when the oil pressure of the hydraulic oil internal circulation type is up to 30 MPa, and the technical requirements for the cleanliness and surface smoothness of the inner wall of the embedded steel pipe. The surface quality of the hydraulic oil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C9/02
CPCB22C9/02
Inventor 李建军蒋涛谭万红刘青平郭兴雄吴忠
Owner GUANGDONG BLOOMACHINE
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