CN1200475A

CN1200475A - Insulating case, and apparatus and method for mfg. same

Info

Publication number: CN1200475A
Application number: CN98106955A
Authority: CN
Inventors: 宣相圭; 孔在正; 李载浩
Original assignee: LG Industrial Systems Co Ltd
Current assignee: Karir-LG Co., Ltd.
Priority date: 1997-04-22
Filing date: 1998-04-21
Publication date: 1998-12-02
Anticipated expiration: 2018-04-21
Also published as: ID20170A; KR100226059B1; JPH10309729A; KR19980077713A; CN1109870C

Abstract

An insulating sleeve for a refrigerator whose insulating element is reinforced and the device for producing the insulating sleeve and the method are discloses. The insulating sleeve comprises a reinforcing element which is formed by resin and an insulating element which can be formed and bonded on the reinforcing element through the expansion of expandable polymer pellets. In order to produce the insulating sleeve, the reinforcing element which is formed in advance is installed on a molding projection of a movable module, non-volatile binding agent is sprayed on the outer surface of the reinforcing element, and the movable module is moved into an inner cavity of a fixed module so as to limit one molding chamber which forms the insulating element in the inner portion, wherein the insulating element is not fixed on the reinforcing element after individually molded, but is directly bonded on the reinforcing element through the device and the method in the forming process of the insulating element.

Description

Muff and process units thereof and method

The present invention relates to the muff (insulating case) of usefulness such as refrigerator, refrigerator display case, and produce the apparatus and method of muff.The present invention be more particularly directed to a kind of muff, wherein a resin piece of strengthening by adhesive bonds on its heat preservation member to strengthen its structure; And the device and method of producing this muff.

Muff is generally used in the refrigerator so that its refrigeration and refrigerating chamber thermal insulation, and the cooling air that is produced by one or more evaporimeters circulates by this cooling and refrigerating chamber.The such muff and the inner box of refrigerator or outer box-like are in aggregates or insert between inner box and the outer box preventing that heat is delivered in refrigeration and the refrigerating chamber, thereby stop the temperature rising in these chambers.Muff also can be used in the refrigerator display case in department store or supermarket etc.

According to conventional methods, in order to produce such muff, the steel plate of inner box and outer boxlike is assembled with each other, thereby is limited an inner space and sealed by these plates, imports polyurethane particles then and expands in this space.But the shortcoming of said method not only is because its steel plate assembling and seal process cause the whole process of production complexity, and because its weight causes muff to be not easy to carry greatly.And, because muff itself comprises the main part of refrigerator or showcase, can not be under its situation about being damaged easily to its place under repair.

According to another conventional method, for the corrosion that prevents steel plate with reduce the weight of muff, internal resin cover and outside steel plate are assembled with each other, and import the polyurethane pellet then and expand in this inner space that is limited by internal sleeve and outside steel plate.But in one method of back, the weight of muff can not effectively reduce, and as last method, muff itself comprises the main part of refrigerator, when needed can not be easily to its place under repair.

On the other hand, the muff by the polystyrene pellet that expands is molded as because it is in light weight and production method is simple, thereby has been widely used.Fig. 1 shows the device of producing conventional muff.This device is fixed to (not shown) on the pedestal, and comprise that a fixed die 2 and with inner chamber 6 has a moulding projection 4A can horizontal mobile mould 4.

Be formed with inlet 2A on the upper wall of fixed die 2, expandable polystyrene pellet imports by this inlet.After the polystyrene pellet imported by inlet 2A, they passed through steam expanded adding to depress.

Be formed with the first vapor injection hole 2B on the sidewall of fixed die 2, steam injects by this injection orifice and enters inner chamber 6 or from wherein discharging, movably be formed with the second injection orifice 4B on the film 4, and steam can flow into this injection orifice.

Fig. 2 A～2C explains the profile for preparing the method for muff with the device of Fig. 1.Shown in Fig. 2 A, movably mould 4 original and that fixed die 2 separates moves laterally in the inner chamber 6 of fixed die 2 and is meshed with fixed die 2 then.Referring to Fig. 2 B, 2A imports expandable polystyrene pellet in the inner space that is limited by fixed die 2 and removable mould 4 by inlet.Now referring to Fig. 2 C, add the steam of depressing and inject the inner space continuously by the first steam hand-hole 2B on the fixed die 2, and permeate by the space between the polystyrene pellet, the result discharges by the second steam hand-hole 4B in the removable mould 4.After a period of time, steam injects the inner space by the second steam hand-hole 4B in the removable mould 4 successively, and discharges by the first steam hand-hole 2B in the fixed die 2.Alternately finishing steam by the first and second hand-

hole

2B and 4B injects.By steam heat the polystyrene pellet is expanded and form muff 5.

Muff 5 has desirable lower weight, but because the structure of the fragility of cover itself makes it not be suitable in refrigerator or the showcase.

Fig. 2 D is the profile of expression with the muff of the remodeling of the device production of Fig. 1.Referring to Fig. 2 D, the independently inner part 8 that is moulded by resin mold is fixed on the muff 5 so that strengthen the structure of muff 5.But, in the muff of Fig. 2 D, need independent operation that inner part 8 is fixed on the muff 5, this is pretty troublesome, and, when the complex contour of muff 5, be difficult to inner part 8 is fixedly attached on the muff 5.

USP 4,275,539, authorize Richard V.Abott, and exercise question is " heat preserving method of stone and device and the piece material for preparing thus ", and having disclosed wherein, heat-insulation layer is molded into the swellable polymer pellet in the inner chamber of concrete block material.According to the method for Abott, with steam the polystyrene pellet is expanded so that form heat-insulation layer, this heat-insulation layer is fused on the inner surface of inner chamber.

Therefore, the purpose of this invention is to provide a kind of muff, this muff is in light weight and be easy to produce and dispose.

Second purpose of the present invention provides the device of producing muff, this device can directly be fixed insulation material and resin by enough adhesives in the moulding process of insulation material, and does not need to produce separately insulation material with resin material and with they fixed to one another being in the same place.

The 3rd purpose of the present invention provides the method for producing muff, this method can directly be fixed insulation material and resin by enough adhesives in the moulding process of insulation material, and does not need to produce separately insulation material with resin material and with they fixed to one another being in the same place.

In order to realize first purpose of the present invention, a kind of muff that is used for isolated external heat is provided, it is to form in refrigeration and refrigerator compartment body interior, body is made by steel plate, be characterised in that muff contains resinous substances and the insulation material of strengthening the muff structural strength, this insulation material be molded as by expandable polystyrene pellet and by adhesive bonds to resinous substances.

Adhesive is nonvolatile, and it comprises hotmelt.

In order to finish second purpose of the present invention, a kind of device of producing this muff is provided, this device comprises a fixed die and a removable mould, and described fixed die comprises inner chamber and a plurality of steam hand-hole of a reservation shape, and steam injects inner chamber by this hole; Described removable mould inserts in the inner chamber of fixed die to limit a molding chamber, muff forms in this molding chamber, this device is characterised in that described fixed die contains a plurality of steam hand-hole and inlets of insulation material being introduced the molding chamber that steam injected inner chamber, removable mould has moulding projection and the water cooling passageway that wherein is inserted with resinous substances, and this passage forms in mobile mould and cooling water passes through this channel cycle.

Fixed die has and a plurality ofly stretches into steam ascending pipe in the molding chamber so that steam is injected insulation material.

Be formed with a plurality of transmission holes on the span part (step portion) in stretching into the molding chamber of each steam ascending pipe.

In order to realize the 3rd purpose of the present invention, the method of producing muff is provided, this method is used to produce the device of muff, wherein fixed die has an inner chamber and steam is injected the steam hand-hole of inner chamber, removable mould inserts in the inner chamber of fixed die to limit a molding chamber, muff forms in this molding chamber, it is characterized in that this method comprises the following steps:

With the protruding step of inserting in the resinous substances with reservation shape of the moulding of removable mould;

Adhesive is sprayed on the lip-deep step of resinous substances;

The inner chamber of removable mould to fixed die moved so that limit the step of the molding chamber that forms muff;

The polystyrene pellet is introduced the step of molding chamber, and

Spray and absorb steam by the steam hand-hole so that the step that the polystyrene pellet is expanded.

Adhesive is nonvolatile, and it comprises hot melt adhesive.

The vapor (steam) temperature scope of spraying is about 130～150 ℃.

Muff of the present invention is strengthened with resinous substances, and the result has improved its structural strength.And, thereby muff in light weight at muff transportation and repair procedures in be easy to dispose.

According to the apparatus and method of producing muff, can stick with glue agent in the moulding process of insulation material directly is fixed to insulation material on the resinous substances, and need not to produce separately insulation material and resinous substances and they are fixed together, thereby simplified the operation of producing muff.And, although because the moulding that forms on insulation material projection is difficult to resinous substances is fixed to the inboard of insulation material, insulation material closely can be fixed on the resinous substances by using the apparatus and method of producing muff of the present invention.

Describe the preferred embodiments of the invention in detail by the reference accompanying drawing, purpose of the present invention and other benefit will be more obvious, in the accompanying drawing:

Fig. 1 is the profile that is used to produce the device of conventional muff;

Fig. 2 A～2C explains the profile of producing the method for muff with the device of Fig. 1;

Fig. 2 D is the profile with the muff of the remodeling of the device production of Fig. 1;

Fig. 3 is the perspective view of muff of the present invention;

Fig. 4 is the profile of device of the preferred embodiments of the invention that is used for the muff of production drawing 3;

Fig. 5 A is the profile of Fig. 4 device remodeling;

Fig. 5 B is the profile that the part of Fig. 5 A is amplified; And

Fig. 6 A～6C explains to produce the profile of the method for muff of the present invention with the device of Fig. 4.

Explain muff and process units and method below with reference to accompanying drawings in detail according to the preferred embodiment of the invention.

Fig. 3 is the perspective view of muff of the present invention.Referring to Fig. 3, according to the heat preservation member 14 that the muff 10 of the preferred embodiment of the invention comprises the reinforcement 12 that is used to strengthen muff 10, is bonded on the reinforcement 12 and is molded as by the swellable polymer pellet, described expandable polymer pellet expand into heat preservation member 14.

Reinforcement and

heat preservation member

12 and 14 have box shape, a side opening of each parts.Heat preservation member 14 is bonded on the outside of reinforcement 12.In a preferred embodiment of the invention, reinforcement 12 is much thinner than heat preservation member 14, and reinforcement 12 is outwardly-bent formation flange in the marginal portion of its open side, and this flange is bonded on the open side edge of heat preservation member 14.

Reinforcement 12 is moulded and is bonded to by resin mold on the heat preservation member 14 to strengthen the structural strength of heat preservation member 14.The polystyrene material is used as polymeric aggregate, and expand and with adhesives to reinforcement 12.

The non-volatile adhesive of preferred use is to be adhered to reinforcement 12 on the heat preservation member 14.When volatile adhesive was coated on the reinforcement 12, it can be with reinforcement 12 fusions.In a preferred embodiment of the invention, use nonvolatile hotmelt.

According to muff 10 of the present invention, because the existence of resin reinforcement 12, the structure of muff 10 is bigger than the muff intensity of the routine of only being made by heat preservation member (this heat preservation member is formed by expandable polystyrene pellet).And because resin reinforcement 12 relative weights are light and much thinner than heat preservation member 14, reinforcement can too much not increase the weight of muff 10, and when carrying or repair muff 10, this has made things convenient for its processing.

Fig. 4 illustrates the device of the muff that is used to produce a preferred embodiment of the present invention.As shown in Figure 4, the inventive system comprises one be fixed on the pedestal (not shown) and have the fixed die 30 of inner chamber 36 and have a moulding projection 42 can horizontal mobile mould 40.

In the upper wall of fixed die 30, be formed with inlet 32, will expand in the swellable polymer pellet importing inner chamber 36 that forms heat preservation member 14 by this inlet.Will be by entering the mouth 32 polymeric aggregates that import in the inner chamber 36 by steam expansion.

Be formed with a plurality of steam hand-holes 34 in the sidewall of fixed die 30, steam injects inner chamber 36 by this hole, and the polymer that imports is by steam expansion.In one embodiment of the invention, about 20 millimeters of the sidewall thickness of fixed die 30, steam hand-hole 34 runs through sidewall, and is evenly distributed on the sidewall of fixed die 30 so that effectively the polymer beads that imports is expanded.

In moulding projection 42, be formed with cooling-water duct 44, when steam injects the molding chamber, be used to cool off the cooling water of reinforcement 12 by these passage 44 circulations.Therefore the reinforcement 12 that the is heated by steam water quench in the aquaporin 44 that is cooled can prevent reinforcement distortion or distortion in the steam injection process.

Fig. 5 A is the profile of remodeling that the device of Fig. 4 is shown, and Fig. 5 B is the profile that the part of Fig. 5 A is amplified.Referring to 5A and 5B, a plurality of steam ascending pipes 46 are distributed in the fixed die 30, are separated with steam hand-hole 34.Each steam ascending pipe 46 runs through fixed die 30 and is projected in the inner chamber 36, forms the steam channel 46A that steam flows through in steam ascending pipe 46.The jag of closed each steam ascending pipe 46 form a plurality of transmission hole 46B that steam channel 46A is communicated with inner chamber 36 of being used at the periphery of steam ascending pipe 46, so steam passes through in the transmission hole 46B importing inner chamber 36.

Fig. 6 A～6C explains to produce the profile of the method for muff of the present invention with said apparatus shown in Figure 4.

Referring to Fig. 6 A, the reinforcement 12 that is formed by resin at first is assembled on the moulding projection 42 of removable mould 40 in advance.Then adhesive is sprayed onto on the outer surface of reinforcement and is covered by adhesive up to its outer surface.In one embodiment of the invention, prevent that with nonvolatile hotmelt resin reinforcement 12 coated adhesives from fusing.Subsequently, removable mould 40 moves in the inner chamber of fixed die 30 to limit a molding chamber between the inner surface of the outer surface of reinforcement 12 and fixed die 30, and heat preservation member 14 will form in this molding chamber.Referring to Fig. 6 B, the swellable polymer particle is full of by being aggregated thing grain product institute fully up to the molding chamber in the importing molding chambers 32 of the inlet in the fixed die 30.Preferably, the polystyrene pellet is used as polymeric aggregate.Now, steam is injected molding chamber a period of time by the steam hand-hole 34 that forms in the fixed die 30, suck a period of time by steam hand-hole 34 then,, thereby in the molding chamber, form heat preservation member 14 so that polymeric aggregate is expanded with steam heat referring to Fig. 6 C.In the expansion process of polymeric aggregate, the injection and the suction of steam are alternately finished.

The temperature value of steam is set to about 130～about 150 ℃, so that polymeric aggregate is fully expanded.As mentioned above, heat preservation member 14 is formed by the polymeric aggregate that expands in the molding chamber with steam.The nonvolatile adhesive of heat preservation member 14 usefulness that has expanded is adhered on the outer surface of reinforcement 12.

In the injection and the suction process of steam, cooling water circulates by the cooling-water duct 44 that forms in the removable mould 40 and is out of shape by steam heat so that prevent reinforcement 12.

When the thickness (being the width of molding chamber) of heat preservation member 14 is excessive, uses with steam hand-hole 34 steam ascending pipes 38 that separate, that be distributed in the fixed die 30 and inject steam to prevent from fully not supply the situation of steam to the swellable polymer pellet.

According to apparatus and method of the present invention, be not fixed on the reinforcement 12 because heat preservation member 14 is produced this heat preservation member 14 of back muff 10, but when heat preservation member 14 moldings, be directly bonded on the reinforcement 12, simplified whole process of production.And even under the situation that forms many moulding projectioies and depression on the inner surface of heat preservation member 14, this heat preservation member 14 also can be by apparatus and method good bond of the present invention to reinforcement 12.

Although described in the preferred embodiments of the invention, the present invention should be understood and these embodiments should be limited to, for those of ordinary skills, below not departing from, can carry out various changes and remodeling under design of claims and the scope.

Claims

1. muff that is used for isolated external heat, it is that this body is to be made by steel plate in the formation of the inside of the body of refrigeration and refrigerator compartment, this muff comprises:

Be used to strengthen the resinous substances of the structural strength of muff; And

By the insulation material that expandable polystyrene pellet is molded as, this insulation material is adhered on the resinous substances by adhesive.

2. the muff of claim 1, wherein adhesive is nonvolatile.

3. the muff of claim 2, wherein non-volatile adhesive is a hotmelt.

4. device that is used to produce muff, it has fixed die and removable mould, described fixed die comprises inner chamber and a plurality of steam hand-hole of reservation shape, steam injects inner chamber by this hole, described removable mould inserts in the inner chamber of fixed die so that limit a molding chamber, muff forms in this molding chamber, and this device comprises:

Fixed die has and a plurality of steam is injected the steam hand-hole of inner chamber and insulation material introduced the inlet of molding chamber; And

Removable mould has moulding projection and the water cooling passageway that wherein is inserted with resinous substances, and this water cooling passageway forms in this removable mould, and cooling water is by this channel cycle.

5. the device of the production muff of claim 4, wherein fixed die has and a plurality ofly stretches into steam ascending pipe in the molding chamber so that steam is injected insulation material.

6. the device of the production muff of claim 5, wherein each steam ascending pipe is formed with a plurality of transmission holes stretching on the span part of molding chamber.

7. method of producing muff, the device that is used to produce muff by use, in this device, fixed die has an inner chamber and steam is injected the steam hand-hole of inner chamber, removable mould inserts in the inner chamber of fixed die to limit a molding chamber, muff forms in this molding chamber, it is characterized in that this method comprises the following steps:

Adhesive is sprayed on the lip-deep step of resinous substances;

The polystyrene pellet is introduced the step of molding chamber, and

8. the method for the production muff of claim 7, wherein this adhesive is non-volatile.

9. the method for the production muff of claim 8, wherein this nonvolatile adhesive is a hotmelt.

10. the method for the production muff of claim 7, wherein the temperature range of the steam that will spray is about 130～150 ℃.