CN1063125C

CN1063125C - Method for mfg. foamed plastic mould insertion of refrigerator

Info

Publication number: CN1063125C
Application number: CN98111902A
Authority: CN
Inventors: 田云山
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-03-25
Filing date: 1998-03-25
Publication date: 2001-03-14
Anticipated expiration: 2018-03-25
Also published as: CN1192400A

Abstract

The present invention provides a method for manufacturing a foamed mould core of a refrigerator, which comprises the working procedures of making a mould and a body of the mould core, wherein the mould making working procedure comprises the making of a foamed box or a door, the part of the foamed box or the door needs to make the mould core is locally coated. The working procedure of making the body of the mould core comprises that a metallic framework is made, a clamp containing a bubble injecting hole is used for fixing the box or the door, foaming materials are injected, and demoulding is carried out after foaming and solidification. The mould is repaired, a needed active telescopic insertion block and/or a pipeline joint is made, and the needed foamed mould core is obtained after test qualification. The present invention has the advantages of short periodicity, low manufacture cost and short mould repair time and can be suitable for a complicated profile, and foaming can be carried out basically without adjustment.

Description

The manufacture method of foamed plastic mould insertion of refrigerator

What the present invention relates to is the manufacture method of a kind of refrigerator (or refrigerator-freezer, refrigerator, refrigerator etc.) foamed plastic mould insertion.

Foamed plastic mould insertion of refrigerator is to overcome foaming power when being used to foam to keep inner container of electric refrigerator indeformable.The manufacture method of foamed plastic mould insertion may further comprise the steps at present:

1, according to design drawings such as refrigerator and inner bag design core rod figure;

2, go out form drawing and make wooden model;

3, with metal founding cast blanks such as aluminium, heat treatment;

4, blank is carried out machining, to use than relatively large planer, milling machine, boring machine etc. usually, make basic blank through roughing, fine finishining;

5, repair file by pincers worker, finish and fit thin portion such as R circular arc, the little inclined-plane processing of part of profile, higher to the pincers worker specification requirement, process is longer;

6, pincers worker is joined the core pattern face that repairs a die again by the inner bag material object, inner bag identical (because of plastic-absorbing component can not meet design drawing fully) behind assurance and the actual plastic uptake of adsorption mould;

7, annexes such as movable telescopic piece are installed on the core rod;

8, profile has surface finish, reaches Waste time and energy, interior circular arc place is difficult to handle well;

9, core rod is loaded onto foaming production line, the prepackage casing is tried foaming, also to carry out repairing a die of certain hour because of profile applying problem usually.

From on can find out that foamed plastic mould insertion adopts material such as cast aluminium to make, though intensity height, durable in use, but it is long to manufacture and design the cycle, the manufacturing cost height, 6～8 ten thousand yuan between, fit consistent usually by difficult with complicated day by day inner bag profile for every cover, and the difficulty that repairs a die, debug time is long, more and more is difficult to satisfy present small lot, many kinds, short-period market demands.

In view of above reason, the objective of the invention is provides a kind of with short production cycle in order to overcome above shortcoming, and low cost of manufacture can adapt to than complex profile, need not debug the manufacture method of the refrigerator foaming core rod that just can foam substantially.

The suitable method of the system of foamed plastic mould insertion of refrigerator of the present invention may further comprise the steps:

1/. be equipped with mould:

A/. the casing or the door body that prepare foaming;

B/. make topical application at the position of casing that has foamed or the required preparation core rod of door body, can adopt epoxy resin to add modes such as glass fabric, japanning, thickness is determined as required, be generally about 2mm, but uneven distribution, purpose is that core rod body and inner bag that the foaming back is produced have certain interval, so that the core rod body surface is handled;

2/. preparation core rod body:

A/. make metallic framework by actual needs, can arrange metal inserted piece in the edge that easily bumps or have movable telescopic to insert, connecing needs to arrange pipeline, and making one of its purpose of metallic framework is the installation of being convenient to core rod body and frothing clamp; Two be to provide to movable telescopic spare on the core rod to install and supporting, three be to strengthen partly intensity of foaming, make it be subjected to foaming power or knockout press can not damaged; Arrange pipeline and suitably fixing as required, can use compressed-air boost when its objective is the demoulding, core rod preheating or heat radiation, because foamable reaction is exothermic reaction, the core rod of expanded material has thermal insulation;

B/. with containing the anchor clamps of annotating abscess casing or door body are fixed;

C/. pour into foamed material, foaming, curing and demolding, foamed material can adopt and contain freon and do not contain freon, as cyclopentane;

D/. the core rod after the demoulding is repaired, be equipped with the movable telescopic that meets various concrete regulations and insert and/or pipe joint, being up to the standards is required foamed plastic mould insertion.

Above-mentioned casing or the door body that is equipped with die process preparation foaming is to make the lining mould according to refrigerator design drawing and inner bag figure, join and repair the lining mould by the prepackage rear box, the assurance profile is fitted, to serve as a contrast mould is contained on casing or the door body and injects blowing agent from annotates abscess and make casing or door foaming, to serve as a contrast mould after the foaming takes off and promptly gets the casing that foams or door body, the lining mould can adopt easy processing to have the material of certain intensity such as timber to make again, reduces cost;

Above-mentioned preparation core rod body operation is made demoulding boosting groove and ventilation and heat groove and the pre-buried mouth of pipe in core surface as required and is connected when the core rod of the demoulding is repaired, applying sclerosis antifriction layer with casing or inner door contact surface simultaneously, can increase casing or door foaming mould case hardness, make core rod have certain intensity and wearability, the demoulding simultaneously is easy, does not scratch inner bag.

Just the characteristics of China market have determined that the output of a certain specification of refrigerator is not too large at present, and as long as surface sclerosis antifriction layer is handled well, just can satisfy the production needs.Foamed plastic mould insertion of refrigerator production technology of the present invention is simple, and cost is low, and cost only is 10%～30% of a metal foaming core rod, and metalwork can use repeatedly on it, and is with short production cycle, can adapt to than complex profile, the time that repairs a die is short, just need not debug substantially and can foam, and is simple, convenient.

Introduce embodiments of the invention below:

Fig. 1 serves as a contrast mould for timber and anchor clamps, foaming casing (door body) position concern schematic diagram.

Fig. 2 is for making core rod body position schematic diagram.

Fig. 3 is for installing screw, demoulding boosting hole, heat radiation air inlet (wind) hole site figure on the core rod body.

Fig. 4 is the position view of metallic framework spare on the foamed plastic mould insertion body.

The manufacture method step of foamed plastic mould insertion of refrigerator is as follows:

One, be equipped with mould:

1,, to join and repair the lining mould with timber manufacturing lining mould 1 according to refrigerator design drawing and inner bag figure etc. by prepackage rear box (door body), the assurance profile is fitted.

2, will serve as a contrast mould 1 and be loaded on the casing 2 (door body), and clamp with anchor clamps 3, foam from annotating abscess 4 injection foaming feed liquids, foaming density is than actual refrigerator required high slightly (also can carry out on the refrigerator foaming line).

3, check foaming rear box (door body), make it fully satisfy the drawing examination requirements.

4, adopt epoxy resin to add glass fabric 5 and in the scope of casing (door body) needs preparation core rod, make topical application, thickness is 2mm, but uneven distribution.Cavity 21 shown in Figure 2 is for making film core cavity.

Two, preparation core rod body.

1, make metallic framework 6,7,8 and the three is welded on the installing plate 9.On metallic framework 6 one ends, be welded with the dividing plate space 11 that contains breach 10, connecting rod 12 in dividing plate space 11 is connected on the termination of metallic framework 6 and counterweight 13 is arranged on the end and another stretches out movable telescopic piece 14 is arranged on the breach end, outside the dividing plate space, the bottom has chance with and mouthful insert 15.On installing plate, be provided with screw 16 is installed, compressed-air ejection boosting hole 17, compressed air or cold and hot wind heat radiation air admission hole 18.

2, place the foam box system to make core rod cavity 21 and fixing metallic framework and installing plate with anchor clamps 19, to foam box perfusion in vivo refrigerator foaming feed liquid, the demoulding gets core rod behind the foamed solidification by fill orifice 20.

3, the finishing core rod makes its surface smoothing, makes demoulding boosting groove and ventilation and heat groove and the pre-buried mouth of pipe on its surface and connects.

4, apply sclerosis antifriction layer with ceramic coating etc. at core rod and inner bag contact surface.

5, install that other movable telescopics are inserted additional and pipe joint etc., become the foamed plastic mould insertion that meets required specification refrigerator.

6, check promptly gets qualified foamed plastic mould insertion.

Above-mentioned steps, it is uniform that pressure is about 0.1 MPa during refrigerator foaming; Performance was roughly as follows after foamed material solidified:

Unit weight: 45～65kg/M ³

Compression strength: 0.2～0.5 MPa

Dimensional stability: ± 0.5～1%

Serviceability temperature :-60 ℃～120 ℃

Thermal conductivity factor: 0.022～0.024 kilocalorie/meter, the time, degree.

If any the casing that foams, need not prepare to serve as a contrast mould when then being equipped with die process, simplified technology more.

Claims

1, the manufacture method of foamed plastic mould insertion of refrigerator is characterized in that manufacture method comprises the steps:

1/. be equipped with mould:

A/. the casing or the door body that prepare foaming;

B/. make topical application at the position of casing that has foamed or the required preparation core rod of door body;

2/. preparation core rod body;

A/. make metallic framework by actual needs, can arrange metal inserted piece, arrange pipeline as required in the edge that easily bumps or have movable telescopic to insert;

C/. pour into foamed material, foaming, the fixing back demoulding;

D/. the core rod after the demoulding is repaired, be equipped with the movable telescopic that meets various concrete regulations and insert and/or pipe joint, being up to the standards is required foam films core.

2, the manufacture method of foamed plastic mould insertion of refrigerator according to claim 1, the casing or the door body that it is characterized in that die process preparation foaming fully are to make the lining mould according to refrigerator design drawing and inner bag figure, join and repair the lining mould by the prepackage rear box, the assurance profile is fitted, to serve as a contrast mould and be contained on casing or the door body and from annotate abscess, inject blowing agent and make casing or door foaming, will serve as a contrast mould after the foaming and take off and promptly get a casing or a body that foams.

3, the manufacture method of foamed plastic mould insertion of refrigerator according to claim 1 and 2, it is characterized in that preparing core rod body operation and when the core rod of the demoulding is repaired, make demoulding boosting groove and ventilation and heat groove and the connection of the pre-buried mouth of pipe in core surface as required, applying sclerosis antifriction layer with casing or inner door contact surface simultaneously.