CN1114608A - Hot deep drawing method and apparatus for sheet material - Google Patents

Hot deep drawing method and apparatus for sheet material Download PDF

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Publication number
CN1114608A
CN1114608A CN95104348A CN95104348A CN1114608A CN 1114608 A CN1114608 A CN 1114608A CN 95104348 A CN95104348 A CN 95104348A CN 95104348 A CN95104348 A CN 95104348A CN 1114608 A CN1114608 A CN 1114608A
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CN
China
Prior art keywords
sheet material
light sheet
draw
deep
hot deep
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.)
Pending
Application number
CN95104348A
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Chinese (zh)
Inventor
伊藤新一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Publication of CN1114608A publication Critical patent/CN1114608A/en
Pending legal-status Critical Current

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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
    • B29C51/08—Deep drawing or matched-mould forming, i.e. using mechanical means only
    • 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
    • B29C51/264—Auxiliary operations prior to the thermoforming operation, e.g. cutting
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/02—Bending or folding
    • B29C53/04—Bending or folding of plates or sheets
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0054—Shaping techniques involving a cutting or machining operation partially cutting through the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
    • B29L2007/002—Panels; Plates; Sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/46—Knobs or handles, push-buttons, grips
    • B29L2031/466—Keypads, keytops

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

A hot deep drawing method and apparatus for sheet material. In this hot deep drawing method, an edge portion of a sheet material is subjected to hot deep drawing to form an edge bent portion, and thereafter, a three-dimensional shaped portion of a product is formed on the sheet material by hot deep drawing. The processing device comprises a pair of metal dies, a forming convex die with a concave part arranged on one metal die, an edge bending die which is arranged on the other metal die and is embedded with the forming convex die, a buffer plate arranged on the inner side of the edge bending die and a deep drawing convex die which is arranged on the inner side of the buffer plate and is embedded with the concave part of the forming convex die.

Description

The hot deep-draw processing method and the device thereof of light sheet material
The present invention relates to a kind of light sheet material and carry out hot deep-draw processing, make it to form the hot deep-draw processing method and the device thereof of three-dimensional shape, be used for the shaping of instrument hornbook etc. thermoplastic resin.
As the hot-working method of thermoplastic resin sheet material, hot deep-draw processing method is arranged.Use this processing method, carry out the shaping of instrument hornbook.This method is opened propositions such as flat 5-269829 communique by the spy.
The hot deep-draw processing method of this hornbook, be on the relative contact of pair of metal die drawing deep periphery, the recess and the protuberance of annular are set, light sheet material is held under the arm between two metal patterns, contact-making surface place at the metal pattern that is provided with recess and protuberance, one side seize on both sides by the arms thin analyse material around, one side is pushed deep-draw portion in the central, in this way carries out the hot deep-draw processing of hornbook as shown in Figure 12 and Figure 13.
Add man-hour,, shown in Figure 12,13, around the deep-draw portion 32 of light sheet material 30, form the mobile suppressing portion 31 of raised line by annular recess on the contact-making surface that is located at two metal patterns and protuberance.Can suppress deep-draw like this and add man-hour and cooling and produce moving of material because of distortional stress when changing, make finished product also not produce distortion.
But the hornbook that hot like this deep-draw processes also will be with the edge part excision of light sheet material 30.Among Figure 12, only be that the spot part is used as hornbook, and around deep-draw portion 32, form the mobile suppressing portion 31 of raised line.Therefore, must will comprise the edge part excision of mobile suppressing portion, like this, the problem that is produced is that cut part is many, and just waste part is many, and the effective rate of utilization of material is reduced, and Master Cost increases.
The objective of the invention is in order to solve the problem of above-mentioned existence, a kind of hot deep-draw processing method and device thereof are provided, can prevent to produce distortion, simultaneously, the cut-out when as far as possible reducing margins of excision, the consumption and the cost of reduction material.
For achieving the above object, the hot deep-draw processing method of thin plate of the present invention is on the light sheet material of thermoplastic resin, and hot deep-draw is processed to form the three-dimensional shape part of goods.In this hot deep-draw processing method, comprise forming operation and forming process.Described formation operation is to process the edge part of this light sheet material by hot deep-draw, makes its bending, forms curved edge portion at this edge part; Described forming process is after forming this curved edge portion, is processed to form the operation that the three-dimensional shape part of goods is shaped by hot deep-draw on this light sheet material.
At this, above-mentioned light sheet material is cut into the polygon of corresponding goods size in advance, should the slightly rectangular shape of polygonal each spring Qu Chengwei, form above-mentioned curved edge portion.
Processing unit (plant) of the present invention, seize the thermoplastic resin sheet material on both sides by the arms with the pair of metal mould, this light sheet material is carried out hot deep-draw processing, form the three-dimensional shape part of goods, this processing unit (plant) is made of forming terrace die, curved edge mould, buffer board and deep-draw punch.
Forming terrace die is located on the metal pattern, and this forming terrace die is provided with the recess of the three-dimensional shape part that is used to form goods;
The curved edge mould is located on another metal pattern, and chimeric by with above-mentioned forming terrace die forms curved edge portion at the edge part of light sheet material;
Buffer board is located at the inboard of above-mentioned curved edge mould, is subjected to pushing of above-mentioned forming terrace die, can retire backward;
The deep-draw punch is located at above-mentioned buffer board inboard, with the recess tabling of above-mentioned forming terrace die, light sheet material is carried out hot deep-draw processing, makes it form the three-dimensional shape part.
In the hot deep-draw processing method of above such formation, the edge part of light sheet material is processed to form curved edge portion through hot deep-draw, thereafter, because forming the three-dimensional shape of goods partly is that hot deep-draw processes shape, when after the light sheet material demoulding during cooling curing, because the effect of the curved edge portion that the edge part of light sheet material forms, the distortional stress of goods part can keep balance well, prevents to produce distortion.
And, even add man-hour,, also can suppress moving of material by curved edge portion in hot deep-draw, prevent to produce distortion.
In addition, in the edge part formation curved edge portion of light sheet material, replace the mobile suppressing portion of formed raised line on every side of existing goods part, minimizing comprises the cut-out of curved edge portion, like this, just can improve the qualification rate of material, reduces fee of material.
In addition, in advance light sheet material is cut into the polygon of corresponding goods size, polygonal each limit is bent to the slightly shape at right angle, form curved edge portion, like this, also can reduce cut-out.
Processing unit (plant) uses simply constructed pair of metal mould, forming terrace die, curved edge mould, buffer board, pull and stretch punch are arranged, can around light sheet material, form curved edge portion well, simultaneously, on light sheet material, can correctly form the three-dimensional shape of goods.
Below with drawing embodiments of the invention are described.
Fig. 1 is a concise and to the point sectional drawing of implementing the processing unit (plant) of the hot deep-draw processing method of the present invention.
Fig. 2 is the concise and to the point sectional drawing of state after patrix 1 descends.
Fig. 3 carries out the concise and to the point sectional drawing that hot deep-draw adds man-hour after patrix 1 descends.
Fig. 4 is the concise and to the point sectional drawing behind the patrix 1 rising demoulding.
Fig. 5 is thin plane of analysing material S.
Fig. 6 is the oblique view of the light sheet material S after the deep-draw processing.
Fig. 7 is the sectional drawing of same light sheet material S.
Fig. 8 is the plane of hornbook M.
Fig. 9 is the sectional drawing of hornbook M.
Figure 10 is the plane of the light sheet material S1 of another embodiment.
Figure 11 is the oblique view of the light sheet material S1 after the deep-draw of another embodiment is processed.
Figure 12 is the plane of existing light sheet material 30.
Figure 13 is the sectional drawing of same light sheet material 30.
Figure 1 shows that the concise and to the point sectional drawing of the processing unit (plant) that carries out hot deep-draw processing method.This processing unit (plant) is to use the light sheet material of thermoplastic resin, and the device of the hornbook of hot deep-draw processing instrument comprises patrix 1 and counterdie 5.
Patrix 1 has forming terrace die 2, can move up and down, and the bottom surface of forming terrace die 2 (forming face) has a recess 2a, the circular flat that has hornbook shaping usefulness on the recess 2a.
In addition, in forming terrace die 2, be provided with the heater 3 and the push rod 4 of heating usefulness.Push rod 4 is subjected to acting force of the spring, and is outstanding downwards from the bottom surface (forming face) of forming terrace die 2.
Counterdie 5 in the inboard of this curved edge mould 6, is provided with the buffer board 7 of hollow rectangular shape with the curved edge mould 6 of hollow state formation rectangle, and buffer board 7 can upper and lowerly move.And, in the inboard of buffer board 7, be provided with columniform deep-draw punch 8.Inside edge, the upper end portion of curved edge mould 6, its shape is corresponding with the bend that forms the hornbook edge, and top ends and its inboard of the forming terrace die 2 of patrix 1 are chimeric.
The top ends of deep-draw punch 8 is positioned at the below slightly of the upper surface position of curved edge mould 6, and the central portion of counterdie 5 forms a shallow circular depressions.And the tip edge of pull and stretch punch 8 forms taper, and the recess 2a of the forming terrace die 2 of its top ends and patrix 1 is chimeric, forms the rounded portions of hornbook.In addition, in the inside of deep-draw punch 8, be provided with the heater 9 of heating usefulness.
Buffer board 7 is that the rectangular frame of circular hollow, its upper surface are still in the horizontal level identical with curved edge mould 6 in the middle of being.During shaping, the bottom of the forming terrace die 2 of patrix 1 contacts with buffer board 7 exactly.In addition, buffer board 7 can be pushed from the top down, and its inside is provided with spring 10, because the effect of pushing of the forming terrace die 2 of patrix 1, buffer board 7 resists the active force of springs 10 and descends.On buffer board 7, dash forward and establish alignment pin not shown in the figures.
Below above-mentioned processing unit (plant) is used in explanation, the process of hot deep-draw processing instrument hornbook.
As shown in Figure 5, on the light sheet material S of the thermoplastic resin that uses, have the P of Printing Department that is printed on literal etc. in advance, its surface has diaphragm.Thermoplastic resin material for example can use polycarbonate, and the thickness of light sheet material S is 0.5mm, the size of light sheet material S and shape, as shown in Figure 5, the rectangular shape that the edge part that is located at the P of the Printing Department outside is cut into little shape only.Institute's allocation at light sheet material S wears the hole that alignment pin is used in advance.
As shown in Figure 1, such light sheet material S in the hole of counterdie upper edge, embeds the position of alignment pin with the decision mounting.Heater 3 and 9 in forming terrace die 2 and the deep-draw punch 8 is used to heat punch.
After this, patrix 1 descends, the bottom surface of forming terrace die 2 is with after light sheet material S contacts, and patrix 1 continues to descend, in the bottom surface facing to forming terrace die 2, the part that promptly faces toward buffer board 7, by being pressed on the buffer board 7, at this moment, patrix 1 stops to descend with light sheet material S, this state temporarily keeps a period of time, preheating light sheet material S.
After the preheating, buffer board 7 is owing to the effect of forming terrace die 2 is pushed downwards, light sheet material S in the middle of it is owing to be pressed in the inboard of curved edge mould 6, the edge part of light sheet material S (edge parts on four limits) bends to the slightly F of curved edge portion of rectangular shaped, forms its four limits (Fig. 2) like this.
Then, patrix 1 continues to descend, forming terrace die 2 is pushed buffer board 7, up to reaching summit down, as shown in Figure 3, the top portion of the pull and stretch punch 8 on the counterdie 5 and the recess 2a of forming terrace die 2 are chimeric, and the light sheet material S in the middle of it forms the three-dimensional shape of hornbook along the shaping die face deep-draw of the lower end of forming terrace die 2 on light sheet material S.
Thereafter, patrix 1 rises, and leaves counterdie 5, and at this moment under the effect of push rod 4, the light sheet material S after the shaping breaks away from from patrix 1, and the light sheet material S after the demoulding cools off naturally, solidifies, as shown in Figure 4.
Like this, the edge part of light sheet material S is bent to form the F of curved edge portion through hot deep-draw processing, thereafter, because becoming the partly hot deep-draw of hornbook of goods shapes, when after the light sheet material S demoulding during cooling curing, because the effect of the F of curved edge portion that the edge part of light sheet material forms, the distortional stress of hornbook part can keep balance well, prevents to produce distortion.
At last, the unwanted part in the edge of the light sheet material S of curing is excised with cutter, shown in Fig. 8,9, shaping hornbook M.
Also have, in the above-described embodiments, on the light sheet material S before shaping, only the part that stays of cutting has been executed the P of Printing Department afterwards.As shown in figure 10, until the outside of the part of cutting later on (part that dotted line is represented) P1 of Printing Department that prints is arranged, and the edge part R on each limit of rectangular thin plate material S1 can be used as the part of not printing.
Such light sheet material S1, with above-mentioned the same, its surface coverage diaphragm, the processing unit (plant) of use Fig. 1, same as described above, carry out hot deep-draw processing.That is: at first, the hot deep-draw processing of the edge part of light sheet material S1 is bent to form the bend F1 of curved edge, then in the hot deep-draw processing of central portion hornbook part and be shaped, hornbook forms shape shown in Figure 11.
Then, as above-mentioned embodiment, light sheet material S1 is placed on the cutter, excises unwanted marginal portion, as Fig. 8, as shown in Figure 9, form hornbook M.At the P1 of Printing Department that forms on this light sheet material S1 is till the outside of cutting part, and therefore, even the position produces some skews when cutting, the nubbin that does not also have not printing on hornbook stays.1, patrix 2, the protruding film 2a of shaping, recess 5, counterdie 6, curved edge mould 7, buffer board 8, deep-draw punch S, light sheet material F, curved edge portion

Claims (5)

1, a kind of hot deep-draw processing method of light sheet material, it is characterized in that, on the light sheet material of thermoplastic resin, hot deep-draw is processed to form the three-dimensional shape part of goods, this thin analysing in the hot deep-draw processing method of material, the operation of formation and forming process are arranged, described formation operation is to process the edge part of this light sheet material by hot deep-draw, make its bending, form curved edge portion at this edge part; Described forming process is after forming this curved edge portion, is processed to form the operation that the three-dimensional shape part of goods is shaped by hot deep-draw on this light sheet material.
2, the hot deep-draw processing method of light sheet material according to claim 1, above-mentioned light sheet material is cut into the polygon of corresponding goods size in advance, should the slightly rectangular shape of polygonal each spring Qu Chengwei, form above-mentioned curved edge portion.
3, the hot deep-draw processing method of light sheet material as claimed in claim 1 or 2, wherein said said products is the hornbook of instrument, has the Printing Department that prints in advance on the surface of above-mentioned light sheet material.
4, a kind of hot deep-draw processing unit (plant) of light sheet material, comprise the pair of metal mould, it is used to seize on both sides by the arms the thermoplastic resin sheet material, this light sheet material is carried out hot deep-draw processing, form the three-dimensional shape part of goods, this device also comprises forming terrace die, curved edge mould, buffer board and deep-draw punch, it is characterized in that:
Forming terrace die is located on the metal pattern, and this forming terrace die is provided with the recess of the three-dimensional shape part that is used to form goods;
The curved edge mould is located on another metal pattern, and chimeric by with above-mentioned forming terrace die forms curved edge portion at the edge part of light sheet material;
Buffer board is located at the inboard of above-mentioned curved edge mould, is subjected to pushing of above-mentioned forming terrace die, can retire backward;
The deep-draw punch is located at above-mentioned buffer board inboard, with the recess tabling of above-mentioned forming terrace die, light sheet material is carried out hot deep-draw processing, makes it form the three-dimensional shape part.
5, as processing unit (plant) as described in the claim 4, said products is the hornbook of instrument, has the Printing Department that prints in advance on the surface of above-mentioned light sheet material.
CN95104348A 1994-06-07 1995-04-14 Hot deep drawing method and apparatus for sheet material Pending CN1114608A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP12552794 1994-06-07
JP125527/94 1994-06-07
JP6244295A JPH0852794A (en) 1994-06-07 1994-10-07 Method and apparatus for thermal draw processing of sheet material
JP244295/94 1994-10-07

Publications (1)

Publication Number Publication Date
CN1114608A true CN1114608A (en) 1996-01-10

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ID=26461950

Family Applications (1)

Application Number Title Priority Date Filing Date
CN95104348A Pending CN1114608A (en) 1994-06-07 1995-04-14 Hot deep drawing method and apparatus for sheet material

Country Status (3)

Country Link
JP (1) JPH0852794A (en)
KR (1) KR960000460A (en)
CN (1) CN1114608A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103097622A (en) * 2010-09-10 2013-05-08 Bsh博世和西门子家用电器有限公司 Thermal insulation element and method for producing same
CN106239883A (en) * 2016-09-07 2016-12-21 滁州市鑫鼎机械模具制造有限公司 A kind of vacuum forming mould for refrigerator inner container of improvement

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2794314B1 (en) 1999-05-31 2004-12-24 Korea Electronics Telecomm DEVICE AND METHOD FOR MODULATING A DATA MESSAGE USING ORTHOGONAL VARIABLE SPREADING FACTOR (OVSF) CODES IN A MOBILE SERVICE TELECOMMUNICATIONS SYSTEM

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103097622A (en) * 2010-09-10 2013-05-08 Bsh博世和西门子家用电器有限公司 Thermal insulation element and method for producing same
CN103097622B (en) * 2010-09-10 2016-07-06 Bsh家用电器有限公司 Thermal insulation element and the manufacture method for this thermal insulation element
CN106239883A (en) * 2016-09-07 2016-12-21 滁州市鑫鼎机械模具制造有限公司 A kind of vacuum forming mould for refrigerator inner container of improvement

Also Published As

Publication number Publication date
KR960000460A (en) 1996-01-25
JPH0852794A (en) 1996-02-27

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