JPH0134136B2 - - Google Patents
Info
- Publication number
- JPH0134136B2 JPH0134136B2 JP57100857A JP10085782A JPH0134136B2 JP H0134136 B2 JPH0134136 B2 JP H0134136B2 JP 57100857 A JP57100857 A JP 57100857A JP 10085782 A JP10085782 A JP 10085782A JP H0134136 B2 JPH0134136 B2 JP H0134136B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- upper mold
- cut surface
- thermoplastic resin
- recess
- 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
- 238000010008 shearing Methods 0.000 claims description 21
- 229920005992 thermoplastic resin Polymers 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 8
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 239000000057 synthetic resin Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
- B29C51/26—Component parts, details or accessories; Auxiliary operations
- B29C51/30—Moulds
- B29C51/32—Moulds having cutting means
- B29C51/325—Moulds having cutting means combined with means for forming a rim
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
- B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
- B26F1/38—Cutting-out; Stamping-out
- B26F1/44—Cutters therefor; Dies therefor
- B26F2001/4427—Cutters therefor; Dies therefor combining cutting and forming operations
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Forests & Forestry (AREA)
- Nonmetal Cutting Devices (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、熱可塑性樹脂シート等の合成樹脂板
（品）を例えばホツトスタンピング成形等により
形成された製品の裁断面におけるバリ処理方法に
関する。このような製品、例えば冷蔵庫に使用す
る蒸発皿等の容器は、一枚の熱可塑性樹脂シート
を適度な温度まで加熱し、上金型と下金型からな
るスタンピング成形金型にてスタンピングされ、
その后、四辺フランジ部を必要寸法で裁断するこ
とにより構成される。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating burrs on a cut surface of a product formed from a synthetic resin plate (product) such as a thermoplastic resin sheet by, for example, hot stamping molding or the like. Such products, for example containers such as evaporation dishes used in refrigerators, are produced by heating a single thermoplastic resin sheet to an appropriate temperature and stamping it with a stamping mold consisting of an upper mold and a lower mold.
After that, the four side flange portions are cut to the required dimensions.
ところがかかる方法にて構成された蒸発皿に裁
断面は第７図に示す様に、裁断金型ａの上部シヤ
ーリング刃ｂと下部シヤーリング刃ｃとのクリヤ
ランスにより鋭いバリｄが発生する。従つてバリ
処理が行なわれるこの方法は、サンドペーパー
や、ヤスリ等でバリを削り取る方法をとられてい
るが、工数的に手間であるのみならず、削り取ら
れた粉くずが、製品に帯電した静電気により製品
にくつつき、製品が汚れる等の問題を生じてい
た。 However, as shown in FIG. 7, sharp burrs d are generated on the cut surface of the evaporating dish constructed by this method due to the clearance between the upper shearing blade b and the lower shearing blade c of the cutting die a. Therefore, this method of burr treatment involves scraping off the burrs with sandpaper, files, etc., but this is not only time-consuming, but also causes the product to become electrically charged. Static electricity caused problems such as sticking to the product and staining the product.
本発明は、シヤーリング刃とシヤーリング面よ
りも内側で、かつトリミング代離脱方向に、なめ
らかな凹部とを設けた金型を使用し、シヤーリン
グの後に、バリを有する裁断面を凹部内に沿つて
塑性変形させ、バリを前記凹部内にてまるめ、上
記従来の欠点を解消するものである。以下本発明
の一実施例について第１図〜第６図に基づいて説
明する。 The present invention uses a mold having a shearing blade and a smooth recess inside the shearing surface and in the trimming margin removal direction, and after shearing, the cut surface with burrs is plasticized along the inside of the recess. The burr is deformed and the burr is rounded within the recess, thereby solving the above-mentioned drawbacks of the conventional method. An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.
図において、１は冷蔵庫における除霜水を蓄
え、加温蒸発さす蒸発皿（以下容器と呼ぶ）で、
略矩形状の有底の容器部２と、この容器部２の開
口の外側に向つて張り出したフランジ３を有する
もので、一枚の熱可塑性樹脂シートをスタンピン
グ成形して形成する。４は側壁である。この容器
１のフランジ３の外周部にはフランジ３面より一
段下る段差部５を設けてある。 In the figure, 1 is an evaporating dish (hereinafter referred to as a container) that stores defrosting water in the refrigerator and evaporates it by heating.
It has a substantially rectangular bottomed container portion 2 and a flange 3 projecting outward from the opening of the container portion 2, and is formed by stamping a single thermoplastic resin sheet. 4 is a side wall. The outer circumferential portion of the flange 3 of this container 1 is provided with a stepped portion 5 that is one step lower than the surface of the flange 3.
かかる容器１フランジ３、側壁４および段差部
５は第３図〜第６図に示すスタンピング成形過程
で形成される。すなわち加熱され柔軟性が増した
熱可塑性樹脂シート６をスタンピング成形金型で
ある上金型７と下金型８間に介在し、上金型７を
所定加圧力（約10Kg／cm2）でもつて下降し成形す
るものである。次に金型形状について説明する。
上金型７並びに下金型８には、上金型７の降下が
完了する少し前に熱可塑性樹脂シート６を必要な
寸法にトリミングするためのシヤーリング可能な
上金型シヤーリング刃９と下金型シヤーリング刃
１０とを各金型７，８に周縁に沿つて配置してい
る。またトリミング代６′の離脱方向となる下金
型シヤーリング刃１０の内側には、シヤーリング
刃１０上面より窪んだ凹部１１が形成され、この
凹部１１に相対向して、上金型シヤーリング刃９
の内側には凸部１２が形成してある。また凹部１
１のシヤーリング刃１０側の形状はなめらかなア
ール部１３をなしている。１４は凹部１１近傍に
設けたヒータであり、金型温度の調整用である。 The flange 3, side wall 4, and stepped portion 5 of the container 1 are formed by a stamping process shown in FIGS. 3 to 6. That is, a heated thermoplastic resin sheet 6 with increased flexibility is interposed between an upper mold 7 and a lower mold 8, which are stamping molds, and the upper mold 7 is pressed under a predetermined pressure (approximately 10 kg/cm 2 ). The material is then lowered and molded. Next, the mold shape will be explained.
The upper mold 7 and the lower mold 8 have an upper mold shearing blade 9 and a lower mold that can be sheared to trim the thermoplastic resin sheet 6 to the required dimensions shortly before the upper mold 7 completes lowering. A mold shearing blade 10 is arranged along the periphery of each mold 7, 8. Further, a recess 11 recessed from the upper surface of the shearing blade 10 is formed inside the lower mold shearing blade 10, which is the direction in which the trimming allowance 6' is removed.
A convex portion 12 is formed inside. Also, the recess 1
The shape of the shearing blade 10 side of No. 1 forms a smooth rounded portion 13. A heater 14 is provided near the recess 11 and is used to adjust the mold temperature.
次に成形状況を説明する。 Next, the molding situation will be explained.
シート６を加熱して柔軟性を付与させたのち、
上金型７を下降さす。上金型７がシート６を押し
込むにつれ、第３図矢印で示すように樹脂が容器
１の中心部に流れ込む。さらに上金型７が下降
し、上金型７のシヤーリング刃９が下金型８のシ
ヤーリング刃１０と接する位置においては、第４
図に示すように、熱可塑性樹脂シート６は必要な
寸法にシヤーリングされることになる。この時、
シヤーリング裁断面１５のトリミング代６′の離
脱方向には、鋭いバリが発生する。その后、上金
型７の下降により、樹脂の容器１の中心部への流
れ、また上金型７の凸部１２に熱可塑性樹脂シー
ト６が当接し、凹部１１内に押し込まれる事によ
り、シヤーリング裁断面１５がシート中心部へ移
動し、第５図で示すように下金型８に設けてある
なめらかな凹部１１に引込まれる。さらに上金型
７が下降し、上金型７と下金型８とが加熱された
熱可塑性シート６を完全に押し込み、約10Kg／cm2
の圧力を加えると、第６図のごとく、シヤーリン
グ后の裁断面１５が下金型８の凹部１１内に沿つ
て塑性変形し、シヤーリング時形成されていた裁
断部１５のバリ（図示せず）が、塑性変形により
凹部１１の形状に変形し、なめらかな面を呈する
ことになる。尚、トリミング代６′の離脱方向と
逆側の裁断面１５はシヤーリング刃９の押し込み
によりアールが形成されバリは生じない。 After heating the sheet 6 to impart flexibility,
Lower the upper mold 7. As the upper mold 7 pushes the sheet 6, the resin flows into the center of the container 1 as shown by the arrow in FIG. The upper mold 7 further descends, and at the position where the shearing blade 9 of the upper mold 7 contacts the shearing blade 10 of the lower mold 8, the fourth
As shown in the figure, the thermoplastic resin sheet 6 will be sheared to the required dimensions. At this time,
Sharp burrs are generated in the direction of separation of the trimming allowance 6' of the shearing cut surface 15. After that, as the upper mold 7 descends, the resin flows to the center of the container 1, and the thermoplastic resin sheet 6 comes into contact with the protrusion 12 of the upper mold 7 and is pushed into the recess 11. The shearing cut surface 15 moves to the center of the sheet and is drawn into the smooth recess 11 provided in the lower mold 8, as shown in FIG. Further, the upper mold 7 descends, and the heated thermoplastic sheet 6 is completely pushed into the upper mold 7 and the lower mold 8, approximately 10 kg/cm 2
When this pressure is applied, the cut surface 15 after shearing is plastically deformed along the inside of the recess 11 of the lower die 8, as shown in FIG. However, due to plastic deformation, it deforms into the shape of the recess 11 and presents a smooth surface. Note that the cutting surface 15 on the opposite side to the removal direction of the trimming allowance 6' is rounded by the pushing of the shearing blade 9, and no burrs are generated.
したがつて、従来例の様に、シヤーリングした
裁断面にバリｄが発生しないため、サンドペーパ
ーや、ヤスリで後加工する必要がなく、商品価値
をあげるばかりか、製品安全上にも優れた容器が
得られる。 Therefore, unlike conventional examples, burrs do not occur on the sheared cut surface, so there is no need for post-processing with sandpaper or file, which not only increases product value but also improves product safety. is obtained.
以上の説明からも明らかな様に、本発明は、合
成樹脂板（品）の裁断加工に際してシヤーリング
面よりも内側で、トリミング代離脱方向に、なめ
らかな凹部を設けた金型にて、シヤーリングの後
に、裁断面が凹部内に沿つて塑性変形させること
により、裁断面におけるバリ処理を行なう方法で
あるため、シヤーリング後サンドペーパーや、ヤ
スリ等で、裁断面を仕上げる必要がなく、裁断と
同時にバリ処理を行えるためその生産性が向上す
る。また、片側の金型になめらかな凹部を設ける
だけで、完全なバリ処理が可能であり、金型代も
安価となる。 As is clear from the above description, the present invention uses a mold that has a smooth recess in the direction of trimming allowance removal from the shearing surface when cutting a synthetic resin plate (product). Since this is a method that deburrs the cut surface by plastically deforming it along the inside of the recess, there is no need to finish the cut surface with sandpaper or file after shearing, and the burr is removed at the same time as cutting. Processing can be performed, which improves productivity. Further, complete burr treatment is possible by simply providing a smooth recess in one side of the mold, and the cost of the mold can be reduced.
第１図は本発明をスタンピング成形に適用した
成形品の一実施例を示す容器の斜視図、第２図は
第１図の―′線における断面図、第３図〜第
６図はスタンピング成形過程における裁断面のバ
リ処理を示す工程図、第７図は従来例の裁断部を
示す容器の裁断面である。
６′…トリミング代、９…上金型シヤーリング
刃、１０…下金型シヤーリング刃、１１…凹部。
Fig. 1 is a perspective view of a container showing an example of a molded product in which the present invention is applied to stamping molding, Fig. 2 is a sectional view taken along line -' of Fig. 1, and Figs. 3 to 6 are stamping forming. FIG. 7, which is a process diagram showing the burr treatment of the cut surface in the process, is a cut surface of a container showing the cutting portion of a conventional example. 6'...Trimming allowance, 9...Upper mold shearing blade, 10...Lower mold shearing blade, 11...Recessed portion.
Claims (1)
金型との間に所定温度に加熱される熱可塑性樹脂
シートを位置させ、前記上金型を下金型方向に移
動させて前記熱可塑性樹脂シートを所定形状にス
タンピング成形する際、前記上金型と下金型の周
縁に沿つて配置したシヤーリング刃にて前記上金
型の移動により前記熱可塑性樹脂シートを裁断し
た後、この裁断面を前記上金型のさらなる移動に
より前記下金型に設けたなめらかな凹部に引込
み、この裁断面を前記上下金型により前記凹部に
沿つて塑性変形させてなる合成樹脂品の裁断面バ
リ処理方法。1. A thermoplastic resin sheet heated to a predetermined temperature is positioned between an upper mold and a lower mold that constitute a stamping mold, and the upper mold is moved toward the lower mold to remove the thermoplastic resin. When stamping a sheet into a predetermined shape, the thermoplastic resin sheet is cut by the movement of the upper mold using shearing blades arranged along the periphery of the upper mold and the lower mold, and then the cut surface is A method for deburring a cut surface of a synthetic resin product, the upper mold being further moved to be drawn into a smooth recess provided in the lower mold, and the cut surface being plastically deformed along the recess by the upper and lower molds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57100857A JPS58217318A (en) | 1982-06-11 | 1982-06-11 | Flash processing on cut surface of synthetic resin article |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57100857A JPS58217318A (en) | 1982-06-11 | 1982-06-11 | Flash processing on cut surface of synthetic resin article |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58217318A JPS58217318A (en) | 1983-12-17 |
| JPH0134136B2 true JPH0134136B2 (en) | 1989-07-18 |
Family
ID=14284973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57100857A Granted JPS58217318A (en) | 1982-06-11 | 1982-06-11 | Flash processing on cut surface of synthetic resin article |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58217318A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201600105165A1 (en) * | 2016-10-19 | 2018-04-19 | Mondini S R L | METHOD FOR REALIZING A CONTAINMENT AND APPARATUS ELEMENT FOR THE THERMAL WELDING OF A COVERING FILM AT A ANULAR RANGE OF A CONTAINMENT ELEMENT |
| EP3311980B1 (en) * | 2016-10-19 | 2021-02-24 | Mondini S.r.l. | Method for making a containment element and apparatus for heat-sealing a covering film to an annular band of a containment element |
| DE102022104583A1 (en) * | 2022-02-25 | 2023-08-31 | Syntegon Technology Gmbh | Hold-down device for a forming device, method for forming packaging material by means of the forming device, and production machine with such a forming device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS507089A (en) * | 1973-05-23 | 1975-01-24 |
-
1982
- 1982-06-11 JP JP57100857A patent/JPS58217318A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS507089A (en) * | 1973-05-23 | 1975-01-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58217318A (en) | 1983-12-17 |
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