JPH0366586B2 - - Google Patents
Info
- Publication number
- JPH0366586B2 JPH0366586B2 JP15951189A JP15951189A JPH0366586B2 JP H0366586 B2 JPH0366586 B2 JP H0366586B2 JP 15951189 A JP15951189 A JP 15951189A JP 15951189 A JP15951189 A JP 15951189A JP H0366586 B2 JPH0366586 B2 JP H0366586B2
- Authority
- JP
- Japan
- Prior art keywords
- heat insulating
- pressure
- gas
- insulating material
- box body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 238000005187 foaming Methods 0.000 claims description 13
- 239000011810 insulating material Substances 0.000 claims description 13
- 239000006260 foam Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 14
- 239000012774 insulation material Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000007872 degassing Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Landscapes
- Refrigerator Housings (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は断熱箱体の製造装置に係り、特に発泡
断熱材を充填する際に発生する発泡ガスのガス抜
き効率向上、断熱材の流動性向上に好適な断熱箱
体の製造装置に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to an apparatus for manufacturing a heat insulating box, and in particular, to improve the degassing efficiency of foam gas generated when filling a foam heat insulating material and to improve the fluidity of the heat insulating material. The present invention relates to an apparatus for manufacturing a heat insulating box body suitable for.
従来の断熱箱体の製造における発泡ガスの排出
は、外箱または内箱の一部に設けられたガス抜き
穴より自然排出する方法が一般的に行なわれてい
た。最近では上記方法以外に、発泡ガスを強制的
に吸引して減圧しながら断熱材を充填することに
より、ガス抜き抵抗をなくして断熱材の流動性を
大幅に改善できる、いわゆる強制ガス抜き発泡法
に着目している。しかし、この発泡法において
は、断熱材の充填速度に応じた適正吸引量でガス
抜きを行なわないと、予想した効果がでなかつた
り、減圧しすぎてフオームの物性が損なわれたり
するため、その制御方法が問題となつた。当初、
その手段として、断熱材充填空間圧力の変化を圧
力センサーで検知し、圧力指示計に読み込み、排
気管に設けたバルブをモータードライブで自動的
に絞り、吸引量を調節していた。しかし、断熱材
の充填速度が速くなると、バルブの開閉が適正吸
引量に対応できず、減圧量を一定に保持できなく
なる。また、排気感を絞るため吸引装置に負荷が
かかり、加熱するという欠点があつた。なお、こ
の種の製造装置に関するものには例えば特開昭58
−108379号公報等が挙げられる。
In the production of conventional heat insulating boxes, foaming gas has generally been discharged naturally through vent holes provided in a portion of the outer box or inner box. Recently, in addition to the above-mentioned method, the so-called forced gas vent foaming method is used, which eliminates gas venting resistance and greatly improves the fluidity of the heat insulating material by forcibly sucking the foaming gas and reducing the pressure while filling the insulating material. We are focusing on However, in this foaming method, if the gas is not removed at an appropriate suction amount depending on the filling speed of the insulation material, the expected effect may not be achieved or the physical properties of the foam may be impaired due to too much pressure reduction. The control method became a problem. Initially,
As a means of achieving this, a pressure sensor detects changes in the pressure in the space filled with insulation material, reads the data into a pressure indicator, and automatically throttles the valve installed in the exhaust pipe using a motor drive to adjust the amount of suction. However, when the filling speed of the heat insulating material increases, the opening and closing of the valve cannot correspond to the appropriate amount of suction, making it impossible to maintain a constant amount of reduced pressure. Additionally, in order to reduce the feeling of exhaust air, a load is placed on the suction device, causing it to heat up. Regarding this type of manufacturing equipment, for example, Japanese Patent Application Laid-open No. 1983
-108379 publication etc.
本発明の目的は、強制ガス抜き装置の効果を常
に最大限に発揮し、最も断熱材の流動性に優れ、
しかも断熱材の物性を損なわない断熱箱体の製造
方法を提供することにある。
The purpose of the present invention is to always maximize the effect of the forced degassing device, provide the best fluidity of the insulation material, and
Moreover, it is an object of the present invention to provide a method for manufacturing a heat insulating box that does not impair the physical properties of the heat insulating material.
即ち、発泡ガスを強制的に吸引して断熱箱体を
製造する方法において、発泡ガス吸引量を瞬時に
調節する手段として、排気系路を２個以上に分岐
し、急速な断熱材充填空間圧力の変化に応じて、
分岐回路から大気を導入して箱体からの吸引量を
調節し、常に適正圧力に減圧保持できるバイパス
式制御システムとしたものである。同時に、排気
管を絞らずに大気を導入して吸引量を調節するこ
とで、吸込装置に負荷がかからないようにしたこ
とを特徴とするものである。
That is, in a method of manufacturing an insulating box by forcibly suctioning foaming gas, as a means to instantly adjust the amount of suction of foaming gas, the exhaust system path is branched into two or more, and the pressure in the insulation material filling space is rapidly increased. Depending on the change in
This is a bypass type control system that allows atmospheric air to be introduced from a branch circuit to adjust the amount of suction from the box and maintain the reduced pressure at an appropriate level at all times. At the same time, by introducing atmospheric air without restricting the exhaust pipe and adjusting the amount of suction, no load is placed on the suction device.
以下、本発明の一実施例を第１図により説明す
る。外雇１と内雇２に組込んだ、外箱３と内箱４
との空間部に注入口５から断熱材６（ウレタンフ
オーム）を注入し、断熱材６はフオーム流れ方向
７に沿つて充填され、断熱箱体が製造される。こ
の際、発泡ガスと断熱材充填空間内の空気を最終
充填部に設けられた排出口８から、吸引パツト９
を介して、排気管１０、圧力センサー１１、圧力
変換器１２、シーケンサー１３及び排気装置１４
を備えて成る吸引装置で強制的に吸引し排出す
る。
An embodiment of the present invention will be described below with reference to FIG. Outer box 3 and inner box 4 incorporated into outside worker 1 and inner worker 2
A heat insulating material 6 (urethane foam) is injected into the space between the two through the injection port 5, and the heat insulating material 6 is filled along the flow direction 7 of the foam to produce a heat insulating box. At this time, the foaming gas and the air in the insulation material filling space are passed through the suction pad 9 through the exhaust port 8 provided in the final filling part.
Via the exhaust pipe 10, pressure sensor 11, pressure transducer 12, sequencer 13 and exhaust device 14
It is forcibly sucked and discharged using a suction device equipped with a.
即ち、断熱材充填空間圧力を圧力センサー１１
で検知して、圧力変換器１２で電気信号に変換し
シーケンサー１３に読み込む。あらかじめシーケ
ンサー１３に適正圧力を設定しておき、断熱材充
填空間圧力の変化に応じて、分岐回路に設けた三
方弁１５の大気導入口１５ａを瞬時に開閉する方
式とした。なお、シーケンサーの圧力読み込み演
算周期を0.1秒とすれば設定圧力の±0.01Kg／cm2
Ｇに制御できる。本実施例によれば、断熱材の充
填速度に応じて瞬時に適正吸引量に制御でき、か
つ減圧値を一定に保持しながら有効に発泡ガスを
排出できるので、強制ガス抜き発泡法の効果を最
大限に発揮できる。また、排気管を絞らずに大気
を導入して吸引量を調節することにより、吸引装
置に負荷がかからなくなり、吸引装置の加熱防止
に効果がある。 That is, the pressure in the space filled with the insulation material is detected by the pressure sensor 11.
The signal is detected by the pressure transducer 12, converted into an electrical signal, and read into the sequencer 13. A suitable pressure is set in advance in the sequencer 13, and the atmosphere inlet 15a of the three-way valve 15 provided in the branch circuit is instantaneously opened and closed in response to changes in the pressure in the space filled with the heat insulating material. If the sequencer's pressure reading calculation cycle is 0.1 seconds, the set pressure will be ±0.01Kg/cm 2
It can be controlled by G. According to this embodiment, the suction amount can be instantly controlled to an appropriate amount according to the filling speed of the insulation material, and the foaming gas can be effectively discharged while maintaining the reduced pressure value constant. You can perform to your maximum potential. Furthermore, by adjusting the amount of suction by introducing atmospheric air without restricting the exhaust pipe, no load is placed on the suction device, which is effective in preventing the suction device from overheating.
本発明によれば、断熱材充填の際、発生する発
泡ガスを強制的に、かつ、最も効率良く排出でき
るので、断熱材の物性を損なうことなく流動性が
一段と向上し、断熱材の使用量が、従来の自然ガ
ス抜き発泡法に比べ常に安定して３〜４％削減で
きる。さらに、ガス抜き効率が向上するので、ガ
スだまりや外箱のふくれが改善され、断熱箱体の
外観向上にも効果がある。
According to the present invention, the foaming gas generated when filling the insulation material can be forcibly and most efficiently discharged, so the fluidity is further improved without impairing the physical properties of the insulation material, and the amount of insulation material used is reduced. However, compared to the conventional natural gas degassing foaming method, it can be consistently reduced by 3 to 4%. Furthermore, since gas venting efficiency is improved, gas pools and bulges in the outer box are reduced, and the appearance of the insulating box is also improved.
図は本発明の強制ガス抜き発泡法による断熱材
注入を説明する斜視図である。
１……外雇、２……内雇、３……外箱、４……
内箱、５……注入口、６……断熱材、７……フオ
ーム流れ方向、８……ガス排出口、９……吸引パ
ツト、１０……排気管、１１……圧力センサー、
１１ａ……圧力検知管、１２……圧力変換器、１
３……シーケンサー、１４……排気装置、１５…
…三方弁、１５ａ……大気導入口。
The figure is a perspective view illustrating the injection of heat insulating material by the forced degassing foaming method of the present invention. 1...External employment, 2...Internal employment, 3...Outer box, 4...
Inner box, 5...Inlet, 6...Insulating material, 7...Foam flow direction, 8...Gas exhaust port, 9...Suction pad, 10...Exhaust pipe, 11...Pressure sensor,
11a...pressure detection tube, 12...pressure transducer, 1
3...Sequencer, 14...Exhaust system, 15...
...Three-way valve, 15a...Air inlet.
Claims (1)
記空間部に現場発泡等により発泡断熱材を充填し
てなる断熱箱体と、上記断熱箱体に設けられた発
泡断熱剤の発泡ガス排出口から、発泡ガスを強制
的に吸引する吸引装置を具備した断熱箱体の製造
装置において、上記吸引装置にバイパス回路を設
け、上記バイパス回路で上記空間部の圧力が一定
となるように大気を導入することを特徴とする断
熱箱体の製造装置。1. A space created by combining an outer box and an inner box, a heat insulating box body formed by filling the space with a foam heat insulating material by foaming in place, etc., and a foamed gas from the foam heat insulating material provided in the heat insulating box body. In an apparatus for manufacturing an insulated box body equipped with a suction device that forcibly sucks foaming gas from an outlet, a bypass circuit is provided in the suction device, and the bypass circuit sucks air so that the pressure in the space becomes constant. A manufacturing device for a heat insulating box body, which is characterized by introducing the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15951189A JPH0244176A (en) | 1989-06-23 | 1989-06-23 | Manufacture of heat insulating case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15951189A JPH0244176A (en) | 1989-06-23 | 1989-06-23 | Manufacture of heat insulating case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0244176A JPH0244176A (en) | 1990-02-14 |
| JPH0366586B2 true JPH0366586B2 (en) | 1991-10-17 |
Family
ID=15695372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15951189A Granted JPH0244176A (en) | 1989-06-23 | 1989-06-23 | Manufacture of heat insulating case |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0244176A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6408329B2 (en) * | 2014-10-02 | 2018-10-17 | 日立アプライアンス株式会社 | Refrigerator manufacturing method |
| JP6408331B2 (en) * | 2014-10-03 | 2018-10-17 | 日立アプライアンス株式会社 | Refrigerator manufacturing method |
| JP6408345B2 (en) * | 2014-11-05 | 2018-10-17 | 日立アプライアンス株式会社 | Manufacturing method of heat insulation box for refrigerator |
-
1989
- 1989-06-23 JP JP15951189A patent/JPH0244176A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0244176A (en) | 1990-02-14 |
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