DE1808899U - MULTI-NEST BLOW MOLD FOR THE MANUFACTURING OF HOLLOW BODIES FROM THERMOPLASTIC PLASTICS. - Google Patents

Description

PArBI 2 9 3 01 * - 11.5 9

Berlin-LankwitZjderi September 3, 195 Alt-Lankwitz No. 1oo

Gottfried Jü e h η e r t,

Berlin - Lankwitz, Alt ~ Lankwitz Mr. 1oo

Multi-nest blow mold for the production of hollow bodies from thermoplastics

The present innovation has a multi-nest blow molding for the simultaneous production "of several Hollow bodies aue thermoplastics in one operation using a hose-like Blow molding preforms, such as ampoules, bottles and others with diner sin fill " Opened containers, to the object.

Bs is already known, several Hohlkör; "ar made of thermoplastics in the blown version: ...?;.! using a plasticized ear oc: .r tube-like preforms at the same time in a box. i Production process by means of Uehrnest blow molding.

For example, at d3r manufacturing Plasticized tube made of synthetic material is inserted from shaving brush handles into a double nest, one lower end of the tube in each of the Bl: * s-

Blow mold closed and after introduction of each blow nozzle into the two open ends of the tube, clis both tubular parts located in the double nest form inflated by means of the blown compressed air to the desired shape of the shaving brush handle.

In another known device stir simultaneous production of several hollow bodies made of thermoplastics in one operation Xlehrnest blow molds have also already been made in the blow molding process using a tube-like preform used.

Here, the sehlauchartine preform became placed in a two- or three-nest mold, after the blow mold had flowed it was in the blow mold The preform is divided into two or three sections by means of small pistons penetrating the mold walls divided by squeezing the plasticized material at these points and these Peat or railings then divide into the desired hollow body shape by means of a blow nozzle inserted into the blow mold inflated.

The multiple blow mold of the present fire for the simultaneous production of several hollow bodies made of thermoplastics in a blow molding process using a Smart preform brings an essential Improvement compared to the previously known multi-nest blow molds and enables easier and more precise work.

The new version in the well-known «ise 3.: · ■ *. · The split blow mold is divided into several lower insn the lying mold cavities divided, with a blow space between each two mold cavities, which after the introduction of the tubular preform ^ into the blow mold when the two bite mold halves are brought together by means of two dividing walls provided in the middle of the blowing chamber in the two blowing holes is divided into two blow chambers, one of which each each facing a Hestform.

Furthermore, at each end of the blow chamber facing the mold cavity there is a cutting plate for cutting off of the inflated. Hollow body in the two Pormnestern from the useless hollow body created in the two blow chambers during inflation - into the blow mold let in, the cutting plates corresponding to the hollow body diameter at their cutting edges Have separating cutouts.

The plasticized sohlauch-like preform emerging from the extrusion nozzle is introduced into the multiple cavity blow mold, which is divided into two in the vertical axis in the known manner, and the two mold halves of the still open mold are brought together closing firm by de :: - en. Edges are squeezed together and closed at these two Err-i-sn.

The middle parts lying in the inflation chambers of the tube-like Yorformling are at Bringing the two blow mold halves together through the The two fafennwamiteile, located in the middle of the blowing chamber, collide here, being squeezed together the preform part lying in each mold is then closed at both ends. By the Squeezing the material of the preform part together on both of its bands, the molded part is preserved in a lormnest a tension acting in the longitudinal axis.

To inflate the preform parts, a hollow air needle is inserted into each blow molding chamber and the material wall of the preform parts is pierced in the process. When the material wall of the preform part is pierced with the hollow air needle, the preformed wall in the blowing chamber cannot escape because the preformed parts are kept under tension in the two preformed molds.
In the accompanying drawings, for example, a two-nest mold for the production of hollow bodies made of thermoplastic material and provided with a filling opening is shown

Fig. 1 one half of a two-nest blow mold divided into two in the vertical plane with the preform inserted in a top view, Fig. 2

Fig. 2 a section according to Fig.1 in aer

Line A-B,

Fig. 3 one half of one in the vertical Level two-part two-nest blower Yes made with dee from the gate molding both of them see in a top view and

Fig. 4 a cutting lead. The two-nest blow mold, which is divided into two in the vertical plane in a known manner, has an ormnest a and b, which lie one below the other, between which a blow mold is arranged, which by means of the two blow mold parts in the middle of the blow chamber is frennwänd * «41 * nd? when the two halves of the pom are brought together and closed, it is divided into two blow chambers d and e, the blow chamber d being assigned to the loran nest a and the blowing chamber e being assigned to the mold cavity b. At each of the forianest a and b facing Blasraumende, a respective cutting plate f for separating the lalsiJffnung the inflated hollow bodies and cavities h \ in the two. Let a and b sing from the two useless hollow bodies k and \ that arose in the two blow chambers d and e during inflation into the blow mold-MIf tea. Both of the cutting sheets are provided with 3 runners η on their cutting edge, which correspond to the diameter of the neck opening of the! £>& * £ bodies.

for

For inflating the two-nest form m Yorformlings brought in ο will be in each of the two Blowing chambers d and e;) e an air hollow needle ρ and r introduced here, the material wall in the blow chamber pierce the existing rope of the Yorformlings that not when piercing the hollow air needle can evade, since when the two halves are brought together and closed, the material of the preform squeezed together on the Äiden in a known manner is closed and here, while the middle part of the Yorformling located in the bias space ο here through the Collision of the two partition parts c squeezed together so that both ends of the gate molding parts located in the two foraineatures a and b are now closed and therefore have received a tension acting in the longitudinal axis, which is from Importance for the production of flawless Is hollow bodies. By means of the teaching nest blow molding according to the invention, hollow bodies other than those mentioned can also be used getting produced.

gchutzanaprüohe:

Claims (2)

PÄ-B129301 * -3.1lbO damage claims. 1.) Multi-nest fora divided into two parts in the tertiary socket for the simultaneous lerstellong of several hollow bodies made of thermoplastics in one operation, such as ampoules, tubes, bottles, Container KLt a bin filling opening,! Egg figures, dolls, Balls and the like in the needle punching process using a cunning Yorformling, characterized in that there is a bubble space between each iwei lorana star, which after the Introduction of the tubular shaped preform into the blow mold when the two blow molds are brought together ten with ^ aiia. two in the center of the blow mold halves In the blow room -provided partition walls in two blow chambers is divided, each of which has a * JorÄ-nest is facing " 2.) Multi-nest form divided into two in the vertical axis for the simultaneous production of several hollow bodies from thermoplastic plastics in an operation according to claim 1, characterized in that at each a em formest facing At the end of the blower chamber, a metal sheet for separating the ! inflated / hollow body located in the foranesters, of the useless hollow body that was created in each blow chamber during inflation, let into the blow molding body is embedded and the cutting edges of the cutting oils before irennal recesses are made. 3 ·) Multi-nest divided in two along the vertical axis © 3Pm for the simultaneous production of several hollow bodies aas thermoplastics in a "work step according to the" claims 1 and 2, characterized in that the individual in the Lorffinester introduced Yorformling parts between the one formest end and the Blaskamaert partition be kept in tension. ■ ι'— teiitimi