JPS62109619A - Deflashing mold for blow molder - Google Patents

Abstract

PURPOSE:To eliminate the hours required for finishing operation and produce the blow molding products effectively by deflashing just after the clamping stroke of blow molding cycle. CONSTITUTION:After blow molding by the male mold 2 and the female mold 3, the cutting blade 4 at the point for the deflashing frame-shaped mold 1 thimbled at the rear of male mold 2 is slightly moved from the X-X line to the Y-Y line, pushed down to the shoulder 10 of the female cavity 6 and cut the flash 5 of the circumference face 9' of molded product 9. Further, at the same time of cutting, the flash 5 is divided into two portions 5 and 5' with the intermediate blade 4' at a stroke, and released together with the molded product at the time of demolding. The molding product thus produced requires the finish processing and enhances productivity remarkably.

Description

Detailed Description of the Invention [Field of Application of the Invention] The present invention relates to a burr cutting mold device C1 for a blow molding machine that cuts and removes burrs generated around a molded product during blow molding in a mold clamping step C: It is.

[Prior art]

Conventionally, during blow molding, burrs are produced on large products (C), where the weight of the molded product is 20 to 50%, and burrs are formed around the cavity on the parting line, and these can be removed using small blades,
Cutting by hand with various work tools such as cutters,
It was finished with paper polishing. Therefore, the deburring time was about three times longer than the molding operation time.

[Purpose of the invention]

The object of the present invention is to eliminate the above-mentioned drawbacks, perform one double cut immediately after the mold clamping step of the blow molding cycle, eliminate finishing work time, and efficiently produce inexpensive blow molded products.

[Summary of the invention]

In the present invention, a frame-shaped mold for deburring is placed behind one of the male and female molds used in a blow molding machine, and oil and oil are placed behind the male mold.
The frame-shaped mold is movably fitted through the pneumatic engagement 42, and after mold clamping is completed on the parting line, the frame-shaped mold is movably fitted through the engagement 4-2 using oil, air pressure, etc. A burr cutting mold device that can cut a burr by strongly contacting the wall surface of the outer peripheral shoulder of a female mold slightly beyond the cutting line by the thickness of the burr.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a front view of the overall appearance of a blow molding machine equipped with the mold device of the present invention, and FIG. 2 is an enlarged vertical cross-sectional view of the mold clamping section shown in FIG. 1.

A frame-shaped mold l for deburring corresponding to the shape of the cavity is placed between the male mold 2 and the female mold 3. Immediately after the male mold 2, oil is applied.

The frame-shaped mold 1 shown in FIG.
When the tip blade 4 is slightly advanced from the parning line XX line to the Y-Y line, the burr 5 is temporarily advanced to the X-X line by injecting female air, and immediately after that, it is separated into the pressurizing chamber 8. The high pressure pump 13 is used to apply pressure and move the machine up to the 4Y-Y line.

That is, in the present invention, when molding is completed, the male die 2, which has been advanced to the The shoulder part 10 of the cavity 6 is tightly and precisely fitted to cut the burr 5 on the circumferential surface of the molded product 9. Similarly, if the intermediate blade 4' is used to remove the burr 5 for 1 minute at the same time as cutting, even large products can be automatically formed.

〔Effect of the invention〕

In the present invention, the tip blade and the intermediate blade of the frame-shaped mold for deburring are advanced to the Y-Y line slightly beyond the parting line, and are brought into strong contact with the shoulder of the female mold, thereby cutting around the molded product at once. At the same time as cutting the burr, it is divided into two parts, the mold is opened, and air is blown onto the mold. Productivity can be significantly improved without the need for finishing.

[Brief explanation of drawings]

Fig. 1 showing an embodiment of the present invention is a front view of the entire Pro-14 type machine, Fig. 2 is an enlarged view of the mold clamping part in Fig. 1 in a clamped state, and Fig. 3 is a frame-shaped metal plate for deburring. The cross-sectional view of the mold, FIG. 4, shows the state in which the molded product is divided into two parts without burring. l...Frame-shaped mold for burring 2...Male die 3...Female die 4...Cutting blade 4'...Intermediate blade 5.5...Burr lO...Female die shoulder x-x −・Parting line

Claims (1)

[Claims] In a blow molding machine that has a pair of male and female molds, a hydraulically movable frame mold for deburring is fitted behind the male mold, and the male and female molds are placed on the parting line. At the same time as mold clamping is completed, the frame-shaped mold is temporarily stopped at the parting line by hydraulic engagement, and then advanced to a position slightly beyond the parting line, where it touches the shoulder of the female mold. A burr cutting mold device for blow molding machines that cuts burrs by strongly contacting the frame-shaped mold.