CN104387722A - Compounding ratio of metal resin rapid die material and solidifying method thereof - Google Patents

Abstract

The invention discloses a compounding ratio of a metal resin rapid die material and a solidifying method thereof. The die material comprises the following materials according to a compounding ratio: 90-110 parts of epoxy resin, 9-12 parts of curing agents, 15-30 parts of diluents, 20-30 parts of 1.5 mm short-cutting glass fibers, 10-25 parts of graphite powder, 80-120 parts of aluminum powder, 15-30 parts of quartz powder, and 1.2-3 parts of antifoaming agents. For the die material prepared according to the material compounding ratio, epoxy resin E51 or E44, the Brinell hardness, the bending resistance, and the compressive strength all achieve higher values. The material compounding ratio is very suitable for metal resin dies, and provides a necessary technical support for the manufacture of metal resin rapid dies.

Description

A kind of method of metal-resin fast mould material mixture ratio and solidification thereof

Technical field

The present invention relates to a kind of fast mould material, particularly relate to epoxy resin fast mould material mixture ratio and curing process thereof, can be applicable to fast mould field.

Background technology

Rapid die design (Rapid Tooling-RT) is novel method and the novel process of the class quickly manufacturing mould developed by rapid shaping technique (Rapid Prototyping-RP).Metal resin mould is as the one of fast mould, its material is compared with other fast mould materials, there is good dimensional stability, hardness, Anti-pull-press intensity, wear resistance, thermotolerance, and the advantage such as good machining property and thermal conductivity, various thermoforming mould and constructional foaming mould can be made in fast, economical ground.

Current domestic refrigerator plastic uptake, foaming mould are based on aluminum dipping form, although it has the advantages such as degree of precision, fine structure, intensity are good, the life-span is long, but it has, and amount of finish is large, cost is high, the cycle is long, to shortcomings such as equipment requirements are high, directly affects the production in enormous quantities of throwing mould progress and product innovation, the renewal of product innovation simultaneously causes the idle waste of massacre mould.

And epoxy resin mould has, and molding speed is fast, low cost and other advantages, be suitable for making small serial production mould, development about the composition material of this mould is very important, and the different material category of this composite die material selection and different ratio, its mechanical property is also different.

The research of current people to the mechanical property of epoxy resin mold material is more, but is mostly confined to the discussion to material formulation and mechanical property, and it is less to carry out comparatively comprehensive experimental study to the material mixture ratio of epoxy resin mould and curing process thereof.In fact, the mechanical property of material and the blending process of material and curing process have close relationship.Domesticly worked out better suited mold resin material formula, but these formulas are very general, and for the tensile strength of widely used epoxy resin, formula materials and bending strength little.

Summary of the invention

For overcoming the deficiencies in the prior art, the object of the present invention is to provide suitable metal resin mould material prescription and cast cured explosive technique.

For achieving the above object, the present invention is achieved through the following technical solutions:

A kind of metal-resin fast mould material mixture ratio, wherein, this moulding stock is according to following proportioning:

Preferably, a kind of metal-resin fast mould material mixture ratio, wherein, described epoxy resin is E51 or E44.

Preferably, a kind of metal-resin fast mould material mixture ratio, wherein, described solidifying agent is benzene dimethylamine.

Preferably, a kind of metal-resin fast mould material mixture ratio, wherein, described thinner is dibutyl phthalate or butylglycidyl ether, or dibutylester and acetone mixture.

Preferably, a kind of metal-resin fast mould material mixture ratio, wherein, described Graphite Powder 99 particle diameter is 400-600 order.

Preferably, a kind of metal-resin fast mould material mixture ratio, wherein, described aluminium powder particle diameter is 500-600 order.

Preferably, a kind of metal-resin fast mould material mixture ratio, wherein, described silica powder particle diameter is 500-600 order.

Preferably, a kind of metal-resin fast mould material mixture ratio, wherein, described epoxy resin is E51.

Preferably, a kind of method of metal-resin fast mould material cast cured explosive, comprises the following steps:

Step 1) hand operated mixing: material is weighed by proportioning, during material mixing, first the liquid reagents such as epoxy resin, solidifying agent and thinner are mixed, then pour the stirring of powdery filler into, during material mixing, manually described powder filler is stirred into resin matrix;

Step 2) stir in type vacuum injecting and forming machine: the mixing material using type vacuum injecting and forming machine to be obtained by hand operated mixing stirs 20-30min, stirring velocity 80-100r/min;

Step 3) stirring, filling good mixing material are solidified 22-24h, then solidify 1h at 70-85 DEG C in 30-35 DEG C of thermostat container.

The invention has the beneficial effects as follows: 1) with the moulding stock that metal-resin fast mould material mixture ratio of the present invention is obtained, have employed epoxy resin E51 or E44, Brinell hardness, bending strength, ultimate compression strength all reach high value, and described material mixture ratio is comparatively suitable for being used as metal resin mould; 2) under metal-resin fast mould material cast cured explosive technique of the present invention, more fully thoroughly, material mixing is more even in mixing material reaction.The present invention is that metal-resin fast mould makes the technical support providing necessity, simultaneously to promoting that the application & development of Rapid tooling is significant.

Embodiment

Raw material is taken: epoxy resin E51:100g, solidifying agent benzene dimethylamine: 16.5g, thinner dibutyl phthalate: 25ml according to weight, 1.5mm short glass fiber: 20g, 500 order Graphite Powder 99: 10g, 600 order aluminium powder: 110g, 500 order silica powder: 15g, defoamer: 3g;

After material is weighed by proportioning, first the liquid reagents such as epoxy resin, solidifying agent and thinner are first mixed during material mixing, pour powdery filler again into stir, simultaneously in order to make powder filler be whipped into into completely in type vacuum injecting and forming machine, during material mixing, first manually powder filler is stirred into resin matrix; The mixing material using type vacuum injecting and forming machine to be obtained by hand operated mixing stirs 25min, stirring velocity 90r/min; Filling good mixing material is solidified 24h in 30 DEG C of thermostat containers, then solidify 1h at 70 DEG C.

Described metal-resin fast mould material mixture ratio and the method for solidification thereof, can also comprise following performance test:

1) hardness: the relative content of epoxy resin used, solidifying agent and thinner and kind are the principal elements affecting hardness;

2) pliability test: test according to YB-T 5349-2006, the calculation formula of flexural strength is:

${\mathrm{\σ}}_{\mathrm{bb}}=\frac{F_{\mathrm{bb}}{L}_s}{4W},W=\frac{1}{6}{\mathrm{bh}}^2$

In formula: F _bbfor maximum deflection power; L _sfor span; W is specimen cross section coefficient; B is specimen width; H is specimen height;

3) compression testing: the calculation formula of tensile strength is:

$\mathrm{\σ}=\frac{F_b}{S}$

In formula: F _bfor the maximum, force (KN) of bearing during test specimen conquassation; S is the original cross-sectional area (mm of test specimen ²);

4) microscopic test.

After epoxy resin cure, through above-described four kinds of tests, and analyze every test-results and draw, the performance of the resin die adopting moulding stock of the present invention to make is as follows: Brinell hardness: 23.2, bending strength: 58.8MPa, ultimate compression strength: 89.5MPa.

Although embodiment of the present invention are open as above, but it is not restricted to listed in specification sheets and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details.

Claims (9)

1. a metal-resin fast mould material mixture ratio, is characterized in that, this moulding stock is according to following proportioning:

2. metal-resin fast mould material mixture ratio as claimed in claim 1, it is characterized in that, described epoxy resin is E51 or E44.

3. metal-resin fast mould material mixture ratio as claimed in claim 1, it is characterized in that, described solidifying agent is benzene dimethylamine.

4. metal-resin fast mould material mixture ratio as claimed in claim 1, it is characterized in that, described thinner is dibutyl phthalate or butylglycidyl ether, or dibutylester and acetone mixture.

5. metal-resin fast mould material mixture ratio as claimed in claim 1, it is characterized in that, described Graphite Powder 99 particle diameter is 400-600 order.

6. metal-resin fast mould material mixture ratio as claimed in claim 1, it is characterized in that, described aluminium powder particle diameter is 500-600 order.

7. metal-resin fast mould material mixture ratio as claimed in claim 1, it is characterized in that, described silica powder particle diameter is 500-600 order.

8. metal-resin fast mould material mixture ratio as claimed in claim 2, it is characterized in that, described epoxy resin is E51.

9. a method for metal-resin fast mould material cast cured explosive, comprises the following steps:

Step 1) hand operated mixing: material is weighed by proportioning, during material mixing, first the liquid reagents such as epoxy resin, solidifying agent and thinner are mixed, then pour the stirring of powdery filler into, during material mixing, manually described powder filler is stirred into resin matrix;

Step 2) stir in type vacuum injecting and forming machine: the mixing material using type vacuum injecting and forming machine to be obtained by hand operated mixing stirs 20-30min, stirring velocity 80-100r/min;

Step 3) stirring, filling good mixing material are solidified 22-24h, then solidify 1h at 70-85 DEG C in 30-35 DEG C of thermostat container.