JPS6347457Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a nest insertion device for an injection molding machine.

(Problems of the prior art that should be solved by the invention) Conventionally, when changing the molding setup of an injection molding machine, the entire mold is generally replaced. However, if a part of the surface of the molded product is different, the mold can be easily replaced by replacing only that part instead of the entire mold, and the advantage is that the manufacturing cost of the mold can be significantly reduced. There is. On the other hand, the part of the mold to be replaced (hereinafter referred to as the insert) must be positioned with extremely high precision (up to several tens of microns) relative to other mold parts (hereinafter referred to as the mold body). Therefore, the problem that the insert cannot be easily inserted into the insert mounting portion formed in the mold body cannot be avoided.

(Purpose of the invention) The present invention was devised to solve the above-mentioned conventional problems, and it adopts a method of inserting the insert into the mold body from the side, and also facilitates insertion of the insert. The purpose is to

(Structure of the invention) The invention has a mold body attached to a platen.
A nest mounting part opened on the side is formed, a nest insertion guide whose inner surface matches the mounting part is installed adjacent to the nest mounting part, and a nest guide of this nest insertion guide. It is characterized in that a sloped surface capable of receiving and guiding the tip of the insert is formed at the entry side end of the surface.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings. In the drawing, 1 is a fixed platen of an injection molding machine, and a mold body 2 is mounted on the punch surface of the platen. The mold 3 is made by inserting and assembling the insert 4 into the mold body 2. The mold main body 2 is provided with an insert mounting portion 5 having a lip groove-shaped cross section.
has an open upper end on the insert insertion side, a stopper 6 is formed at the lower end, and a guide rail 7 is formed in the opposing groove. On both sides of nest 4,
A protruding strip 8 is formed with narrowed upper and lower ends.The insert 4 is inserted into the insert mounting portion 5 by sliding the protruding strip 8 on the guide rail 7, and the insert tip 9 is inserted into the insert mounting portion 5.
By pressing the mold body 2 against the stopper 6, the mold body 2 and the insert 4 can be combined to form a surface molding part of an injection molded product.

In order to easily and reliably insert the insert 4 into the mold body 2, a hanging fitting 12 is provided at the upper end of the insert 4 so that the insert 4 can be suspended in the insertion position by a chuck 11 of the insert inserter 10. At the same time, a nest insertion guide 13 located directly above the nest mounting portion 5 is mounted on the upper end of the fixed platen 1. The insert insertion guide 13 is inserted into the insert mounting portion 5 of the mold body 2.
It has a lip groove-shaped cross section with a nest guide surface 14 that matches the inner surface of the insert 4, and a sloped surface 15 that can receive and guide the protrusion 8 of the insert 4 is formed at the upper end of the insert guide surface 14. ing.

(Function) The chuck 11 of the nest insertion device 10 causes the nest 4 to
The insertion guide 13 is suspended and placed directly above the insertion guide 13 by traversing or the like, and then lowered. At this time, if there is misalignment between the insert 4 and the insert mounting portion 5 of the mold body 2, the lower end of the protrusion 8 of the insert 4 will be at the upper end of the insert guide surface of the insert insertion guide 13. It is pressed against the sloped surface 15 of and inserted into the nest insertion guide 13. At that time, the nest insertion device 10
Since the insert 4 and the chuck 11 receive force such as traversal force as a reaction force, the insert inserting device 10 performs an automatic correction operation, and the insert 4 is inserted into the insert inserting guide 13. It descends along the child guide surface 14 and is inserted into the insert mounting portion 5 of the mold body 2 by its guide positioning action. Therefore, positioning of the insert 4 by the insert inserting device 10 can be done with rough accuracy. The inserted insert 4 may be held in pressure contact with the stopper 6 using a clamper 16 or the like provided on the mold body 2.

As described above, the present invention adopts a method in which the insert is inserted from one side into the insert mounting part of the mold body, and the insert is configured to be accepted with rough precision and positioned with high precision using the insertion guide. Therefore, the insert of the injection molding machine can be replaced easily and reliably by hand or with a simple insert inserter. In addition, by adopting the above-mentioned insert insertion method, there is no need to connect the mold temperature control piping, wiring, Coretra hydraulic piping, etc., which are essential in the case of the entire mold replacement method, and the insert can be quickly attached and removed. , the efficiency of mold replacement work can be greatly improved.

[Brief explanation of the drawing]

Figure 1 is a front view showing one embodiment of the present invention;
The figure is a partially enlarged view of FIG. 1, FIG. 3 is a plan view of FIG. 2, and FIG. 4 is a front view of the insert. 1...Fixed platen, 2...Mold body, 3...
Mold, 4... Insert, 5... Insert mounting part, 6... Stopper, 7... Guide rail, 8... Projection part,
9...Insert tip, 10...Insert insertion device, 11...
...chuck, 12... hanging fitting, 13... nest insertion guide, 14... nest guide surface, 15... slope surface.

Claims (1)

[Scope of utility model registration request] A mold body mounted on a platen is formed with a nest mounting part that is open to the side, and a nest insertion guide whose inner surface matches the mounting part is installed adjacent to this nest mounting part. A nest insertion device for an injection molding machine, characterized in that a sloped surface capable of receiving and guiding a tip of the insert is formed at the entry side end of the insert guide surface of the insert insertion guide.