JPS6013619Y2 - Polyurethane mold - Google Patents

Description

【考案の詳細な説明】 本考案はポリウレタン成形用金型に関するものであって
、合せ精度が高く、しかもパリの発生が少なく、かつ、
パリ量のバラツキも少なく、製品貴重のバラツキの少な
い安定な成形面を得ることができるポリウレタン成形用
金型を提供するにある。[Detailed description of the invention] The present invention relates to a mold for molding polyurethane, which has high fitting accuracy, less occurrence of flash, and
To provide a polyurethane molding die capable of obtaining a stable molding surface with little variation in the amount of paris and less variation in product quality.

一般に、ポリウレタン成形用金型、例えば自動車等のウ
レタンバンパのアブソーバを成形する金型は第１図、第
２図に示すように、下側金型１が２．２’、２″等に分
割されており、その上部に上側金型３が前記分割された
下側金型２．２’。Generally, in a mold for molding polyurethane, for example, a mold for molding absorbers for urethane bumpers for automobiles, the lower mold 1 is divided into 2.2', 2", etc., as shown in Figures 1 and 2. The upper mold 3 is placed on top of the divided lower mold 2.2'.

２″にまたがって載置され、前記下側金型１と上側金型
３とで形成されるキャビティ内に材料を流入して成形面
４を成形するようになっている（下側金型２′は固定さ
れている）。2'', and material is flowed into the cavity formed by the lower mold 1 and the upper mold 3 to form the molding surface 4 (lower mold 2 ’ is fixed).

上述の如く成形金型を分割構造にすることによって、成
形面の成形完了後、上型３を上方へ開き、下型２，２″
を側方へ開けば、成形面４は下側金型１の中央分割部た
る下側金型２′上に載置された状態として取出されるか
ら、該成形面４を下側金型２′から取外すことができる
ため、脱型性が良好であると云う利点がある。By making the molding die into a split structure as described above, after completing the molding of the molding surface, the upper mold 3 is opened upward, and the lower molds 2, 2''
When the molding surface 4 is opened laterally, the molding surface 4 is taken out while being placed on the lower mold 2' which is the central dividing part of the lower mold 1. Since it can be removed from ', it has the advantage of good demoldability.

しかし、上述のように成形金型を分割構造にすると、上
型３と下型２，２’、２”の型締力は紙面上下方向より
働らき、下型２，２’、２″を締める力は紙面左右方向
より働らく。However, when the molding die has a split structure as described above, the clamping force of the upper mold 3 and the lower molds 2, 2', 2'' acts from the vertical direction in the paper, and the lower molds 2, 2', 2'' The tightening force is applied from the left and right directions on the page.

下型２，２″を２′に対して開閉及び締めつける機構は
図示していないが、この機能が少しでも狂うと、下型２
′と２及び２″の上下方向のズレが生じ、上型３との合
せ面及び下側金型２．２’、２″の金型の合せ目にパリ
の発生を生じ、しかもその際のパリ量にもバラツキを生
じ、ひいては製品重量にもバラツキを生ずる欠点がある
。The mechanism for opening, closing, and tightening the lower molds 2, 2'' with respect to 2' is not shown, but if this function goes out of order, the lower mold 2
', 2' and 2'' are misaligned in the vertical direction, causing a crack to occur at the mating surface with the upper mold 3 and at the joint between the lower molds 2, 2' and 2'', and at that time. There is a drawback that the amount of paris varies, which in turn causes variations in the weight of the product.

本考案は実用新案登録請求の範囲に記載した構成とする
ことにより、脱溶が容易で、かつ、金型の合せ度が高く
、パリの発生が少なく、従って一定重量の成形面を安定
して製造できるポリウレタン成形用金型を得ることがで
た。By adopting the structure described in the claims for utility model registration, the present invention facilitates de-melting, has a high degree of mold fit, reduces the occurrence of flakes, and therefore stabilizes the molding surface of a constant weight. We were able to obtain a polyurethane mold that can be manufactured.

第３図及び第４図は本考案の一実施例を示したものであ
るが、つぎにこれら図面に基づいて本考案を説明する。3 and 4 show an embodiment of the present invention, and the present invention will now be explained based on these drawings.

下側金型が、中金型５及び左右の金型５′及び５＃の３
つに分割されており、該３つの金型５，５’、５″が組
付けられて下側金型を形成している。The lower mold is the middle mold 5 and the left and right molds 5' and 5#3.
The three molds 5, 5', and 5'' are assembled to form a lower mold.

（中金型５は固定されている）。もつとも下側金型は図
示の如く３つに分割する必要はなく適宜の数に分割して
もよい。(The middle mold 5 is fixed). Of course, the lower mold does not need to be divided into three parts as shown, and may be divided into an appropriate number of parts.

中金型５の左右の金型５′、５″との垂直方向の合せ面
６′、６″の下側において、該中金型５は、下方に向っ
て夫々拡開する斜面７，７′を有するよう形成されてお
り、前記左右の金型５′及び５″は前記中金型５の合せ
面６，６′及び斜面７，７′に夫々密接できる合せ面８
，８′が形成されている。Below the vertical mating surfaces 6', 6'' of the middle mold 5 with the left and right molds 5', 5'', the middle mold 5 has slopes 7, 7 that expand downward, respectively. The left and right molds 5' and 5'' have mating surfaces 8 that can be brought into close contact with the mating surfaces 6, 6' and slopes 7, 7' of the middle mold 5, respectively.
, 8' are formed.

また、前記左右の金型５′及び５″の夫々外側上部端縁
に切込段部９及び９′が形成されており、該切込段部９
及び９′より上方の側面１０及び１０′は、上方になる
に従って、中食５側に近接して行く斜面に形成されてい
る。Furthermore, cut steps 9 and 9' are formed on the outer upper edges of the left and right molds 5' and 5'', respectively.
The side surfaces 10 and 10' above 9' and 9' are formed into slopes that approach the inner part 5 side as they move upward.

他方、前述の中金型５、左右の金型５′及び５″の上部
に、上側金型１１が載置されており、該上側金型１１の
両側端下側に、前記下側金型を形成する左右の金型５′
及び５″の外側上端縁の切込段部９及び９′並びに斜面
を形成する側面１０及び１０’に密接する下面及び内側
面を有する突出部１２及び１２′が形成されている。On the other hand, an upper mold 11 is placed above the middle mold 5 and the left and right molds 5' and 5'', and the lower mold 11 is placed on the lower side of both ends of the upper mold 11. The left and right molds 5' form the
and protrusions 12 and 12' having lower and inner surfaces that are in close contact with the cut steps 9 and 9' and the side surfaces 10 and 10' forming slopes are formed on the outer upper edge of the 5''.

尚、第３図、第４図中符号１３は成形品である。Note that the reference numeral 13 in FIGS. 3 and 4 is a molded product.

本考案は以上の如き構成になるものであって、成形時上
側金型１１と、下側金型５，５′及び５″の型締力（紙
面上下方向）が働らくと、上側金型１１に形成されてい
る突出部１２．１２’の内側面により下側金型の左右の
金型５′及び５″の斜面たる側面１０及び１０′に力が
働らき、前記左右の金型５′及び５″は中金型５に密着
させられる。The present invention has the above-described structure, and when the clamping force (in the vertical direction in the paper) of the upper mold 11 and the lower molds 5, 5', and 5'' is applied during molding, the upper mold The inner surfaces of the protrusions 12 and 12' formed in the lower mold apply force to the sloped side surfaces 10 and 10' of the left and right molds 5' and 5'' of the lower mold, and the left and right molds 5 ' and 5'' are brought into close contact with the middle mold 5.

このとき、前記左右の金型５′及び５″は、中金型５に
対し、下へずれようとする力が働らくが、中金型５の合
せ面７，７′と前記左右の金型５′及び５″の合せ面８
及び８′が当り、この合せ面７と８及び７′と８′には
下型形締力（紙面左右方向の力）が働らいているので、
左右の金型５′及び５“が中金型５からズレるのを防ぐ
ことができる。At this time, the left and right molds 5' and 5'' exert a downward force on the middle mold 5, but the mating surfaces 7, 7' of the middle mold 5 and the left and right molds Mating surface 8 of molds 5' and 5''
and 8' are in contact, and a lower mold clamping force (force in the left-right direction in the paper) is acting on these mating surfaces 7 and 8 and 7' and 8', so
It is possible to prevent the left and right molds 5' and 5'' from shifting from the middle mold 5.

即ち、成形する際第３図中矢印のように影線め圧がかか
り、中金型５の合せ面６及び６′の下側に形成されてい
る斜面７及び７′並びに上側金型１１の突出部１２．１
２’の内側面に働らく力は成形品１３方向へ作用するた
め、上側金型１１と下側金型の３つに分割されている中
金型５及び左右の金型５′、５″とは密着され、パリの
発生はなく、また不良品の発生は皆無である。That is, during molding, shadow line pressure is applied as shown by the arrow in FIG. Projection 12.1
Since the force acting on the inner surface of the mold 2' acts in the direction of the molded product 13, the middle mold 5 is divided into three parts: the upper mold 11 and the lower mold, and the left and right molds 5', 5''. The company is in close contact with the manufacturer, and there are no defects or defective products.

さらに、本考案に係る金型で底形された成形品は、第４
図のように上側金型を取外し、下側金型を取外し、下側
金型の左右の金型５′及び５″を取外すことによって、
中金型５上に載置された状態として取出されるから、該
中金型５から簡単に取外すことができる。Furthermore, the molded product whose bottom is shaped by the mold according to the present invention has a fourth
As shown in the figure, by removing the upper mold, removing the lower mold, and removing the left and right molds 5' and 5'' of the lower mold,
Since it is taken out while being placed on the middle mold 5, it can be easily removed from the middle mold 5.

以上の如く本考案は下側金型を分割構造とし、該下側金
型の各分割された金型の合せ面に斜面を形成すると共に
、上側金型との合せ面にも、夫々密着できる切込段部及
び斜面たる側面を形成することによって、下側金型の各
分割金型を異なる角度の２つの面で互に密接できるから
、正確に組付けることができると共に、上側金型も同様
に異なる角度の２つの面で下側金型に密接でるから正確
に組付けることができ、また影線めの際前記下側金型の
各分割金型の合せ面に形成した斜面によって影線の際の
力を成形品側へ集中できるから、各金型は相隣接する他
の金型と密着することができ、パリの発生は全くなく、
また成形品の不良率を大巾に減少することができる。As described above, the present invention has a divided structure for the lower mold, and forms slopes on the mating surfaces of each of the divided molds of the lower mold, and can also be closely attached to the mating surfaces with the upper mold. By forming the cut step and the sloped side surface, each of the divided molds of the lower mold can be brought into close contact with each other on two surfaces at different angles, so that accurate assembly is possible, and the upper mold can also be easily assembled. Similarly, since the two surfaces at different angles protrude closely to the lower mold, accurate assembly is possible, and when shading, the slopes formed on the mating surfaces of each split mold of the lower mold allow shadows to be drawn. Since the force at the line can be concentrated on the molded product side, each mold can be in close contact with other adjacent molds, and there is no occurrence of flaking.
Moreover, the defect rate of molded products can be greatly reduced.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は従来の分割金型を形閉めした状態の略示断面図
、第２図は第１図の金型を形開きした状態を示す略示断
面図、第３図は本考案の一実施例の形閉めした状態の略
示断面図、第４図は第３図の金型を形開きした状態の略
示断面図である５：下側金型の中金型、５′、５″二下
側金型の左右の金型、６． ６’：合せ面、７．７’：
斜面、８．８’：左右の金型の合せ面、９．９’：切込
段部、１０．１０’：切込段部を形成する側面、１１：
上側金型、１２．１２’：上側金型両側端の突出部、１
３：成形品。Fig. 1 is a schematic cross-sectional view of a conventional split mold in a closed state, Fig. 2 is a schematic cross-sectional view of the mold shown in Fig. 1 in an opened state, and Fig. 3 is a schematic cross-sectional view of a conventional split mold in a closed state. FIG. 4 is a schematic cross-sectional view of the mold shown in FIG. 3 in an opened state. 5: Middle mold of the lower mold, 5', 5 ``Left and right molds of the two lower molds, 6. 6': mating surface, 7.7':
Slope, 8.8': mating surface of left and right molds, 9.9': cut step, 10.10': side surface forming cut step, 11:
Upper mold, 12.12': Projections at both ends of the upper mold, 1
3: Molded product.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 下側金型が中金型を含む複数個に分割されており、該分
割された部分の合せ面に、垂直方向の面と下側に向って
外側方へ拡開する斜面との二面が形成されており、また
下側金型の左右両側の分割されいる金型外部上端縁に切
込段部と、中央寄りに近接して行く先すぼまりの斜面た
る側面が形成されており、他方上側金型両側端に前記切
込段部及び斜面たる側面に密接する突出部が形成されて
いることを特徴とするポリウレタン成形用金型。The lower mold is divided into a plurality of parts including the middle mold, and the mating surfaces of the divided parts have two surfaces: a vertical surface and a slope that expands outward toward the bottom. In addition, a cut step is formed on the upper edge of the outside of the mold that is divided on both the left and right sides of the lower mold, and a side surface that is a slope that tapers toward the center, and A mold for polyurethane molding, characterized in that protrusions are formed at both ends of the upper mold in close contact with the cut step and the sloped side surface.