JPS6014564Y2 - Synthetic resin blow molding equipment - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an apparatus for simultaneously hollow-molding a plurality of small bottles and the like.

The purpose of this is to speed up the molding cycle and dramatically increase the amount of molding per hour.

Conventional 1. This type of molding equipment fixes a blow bin at a predetermined position below a parison extrusion die, facing upward, and closes the opening/closing mold at the point where the lower end of the parison that has descended from the extrusion die covers the blow bin, forming the molded product. While the parison is opened in the blow bin, the molded product is removed from the blow bin after removing the parison around the molded product. During this time, the parison is stopped lowering and the mold is left open. There was a problem that the molding cycle could not be accelerated because of the unavoidable problems.

The present invention aims to solve this problem and increase the amount of molding.The feature is that the opening/closing mold is installed under the parison extrusion die so as to move up and down, and the mold is alternately moved laterally into and out of the downward position of the mold. Two sets of blowbins are provided to carry out the deburring process, and the molded product opened on the blowbin by molding is deburred and taken out from the blowbin at the lateral movement retreat position of the blowbin, and during this deburring, the parison is removed. This eliminates the need to stop the descent and wait with the mold open, thereby speeding up the molding cycle and increasing the amount of molding as much as possible.

To explain the drawings in detail below, the same number of molds 2aw2b are installed and supported on the inner surface of the extrusion dies 1, and an opening/closing plate 2.2' is arranged to move up and down. , 2b are provided with blowbin groups 3, 3' that move laterally in and out alternately, and the parison descending from the extrusion die is sandwiched between the molds 2 at 2 b and closed and lowered, thereby allowing each of the molds 2a, 2b to close and descend. The molds 2a and 2b are pierced by the blow bin group 3 which has moved laterally directly under the mold 2b, and the air injected from the blow bin group 3 molds a plurality of small bottles etc. at the same time, and when the molded products have solidified, the molds 2a and 2b are opened. The blow bin group 3 moves upward and moves on to the next molding, but during this time the blow bin group 3 that has opened the molded product moves laterally and retreats from the descending path of the mold 2a92b, where it removes burrs and takes out the molded product.
Another blowbin group 3' is moved laterally into the mold 2at2b and is placed on standby.

Reference numeral 4 denotes an opening/closing cylinder for opening/closing the opening/closing plates 2, 2', and the tip of the upward rod 5 is pivotally attached to the middle of the branching rods 6, 6', so that the rod 5 protrudes as shown in FIG. The plates 2, 2' are opened by the actuation and closed by the contraction operation.

Reference numerals 8 and 8' are its driven rods, and 9 is a U-shaped frame for holding.

10.10' is the vertical movement axis of the opening/closing plate 2.2',
It penetrates the fixed base 11 from below the bottom surface of the U-shaped frame 9 and is attached to the lower vertical movable base 12.

A rotating cylinder 13 is built on the vertical movement table 12, and an L-shaped drive lever 1 is mounted on a lever 15 that extends laterally from the rotating shaft 14.
6 is attached at one end, and the other end hangs down and is pivotally connected to the lower stand 17.

Reference numeral 18 denotes a cylinder for lateral movement of the blowbin groups 3, 3', and the tips of rods 19, 19' protruding from both sides are attached to U-shaped legs 21, 21' communicating with the lower side of the binding frame 20.

Reference numerals 22 and 22' designate two plates each for pulling out the molding tool from the blow bin group, and are provided on both sides of the opening/closing plates 2, 2' at the lateral movement retracted position of the blow bin groups 3, 3'.

23 is a cylinder for vertical movement, and 24 is an opening/closing cylinder. One plate is opened and closed by moving the rod 25 back and forth, and the plate on the other side is opened and closed by the see-saw action of driven rods 26 and 27. (6th
28 is two support shafts whose lower portions are fitted into the holding cylinder 30 of the stand leg 29 and whose upper ends are secured to the support frame 31 with nuts.

32 and 32' are cylinders for rotating the blowbin groups 3 and 3', and a projection group 34 is provided on a rod 33, which is sandwiched between U-shaped pieces 35 extending laterally from each blowbin.

36 and 36' are a group of deburring rollers such as runners generated during molding, and are arranged in parallel on the upper inner surface of the drawing plate 22 and 22'.

One group of rollers 36 has a knurl 38 attached to a rotating shaft 37 so that the other group of rollers 36' is transmitted and rotated.

39 is a pressing spring, 40 is a rotation motor, 41.4
1' is a meshing bevel gear.

42 and 42' are air nozzles for side discharge during molding.

43 is a guide roll for horizontal vertical movement, 44 is the same, a pedestal,
45.45' is a guide for lateral movement of the blowbin group.

With the above configuration, when the tip of the parison a extruded from the extrusion die 1 reaches the bottom of the open molds 2a and 2b, extrusion is stopped and the opening/closing plates 2 and 2'
By closing and lowering the molds 2a and 2b, the molds 2a and 2b are lowered with the parison a sandwiched between them, so that the molds 2a and 2b are pierced by the waiting blowbin group 3, and molded by air injection from the blowbin group 3. It is.

After 3 or 4 seconds, it solidifies, so the molds 2a and 2b are opened, and then the molding die (not shown) is pierced by the blowbin group and then moved laterally and retracted, where the plate 22 for extraction is inserted.
．． 22', and is held by the closing of the plate, and after being deburred by the rotation of the blow bin group and the convection rotation of the deburring roller group, the plates 22, 22' are moved upward. By: being pulled out from the rib blow pin group and opening the plates 22° and 22' and the air nozzle 42.
The air is discharged to the outside by air blown from 42'.

In this way, the present invention allows the deburring and ejecting processes to be performed at a position laterally retracted from the vertical movement position of the mold, making the mold clamping cycle of this type of molding equipment as much as possible than before. According to actual measurements, the amount of molding per hour has been reduced from 200 to 350.
K has an increasing effect.

In addition, the parison can be cut by the descending movement of the mold.
This eliminates the need for cutting the parison using a conventional knife or hot cutter, and has the effect of further speeding up the molding cycle.

[Brief explanation of drawings]

Figure 1 is a front view, Figure 2 is an enlarged side view of the opening/closing mechanism and vertical movement mechanism of the opening/closing plate, Figure 3 is an enlarged front view of the vertical movement mechanism, and Figure 4 is the molded product drawing plate and its An enlarged side view showing the opening/closing and vertical movement mechanism, FIG. 5 is a side view showing the opening/closing mechanism of the opening/closing plate, FIG. 6 is a plan view showing the opening/closing mechanism of the extraction plate, and FIG. 7 is the top surface including the runner. FIG. 8 is a plan view showing the deburring roller mechanism, and FIG. 8 is a plan view showing the rotating mechanism of the blowbin group. 1 is an extrusion die group, 2, 2' is a plate for opening and closing the mold group, 3.3' is a blowbin group, 4 is a cylinder for opening and closing plates 2, 2', 5 is a rod, and 6.6' is a branch rod. , 8
, 8' is a driven rod, 9 is a U-shaped frame body, 10 and 10' are vertical movement shafts of the opening/closing plate, 11 is a fixed base, 12 is a vertical movement base,
13 is a rotating cylinder, 14 is a rotating shaft, 15 is a lever,
16 is a drive lever, 18 is a cylinder for lateral movement of the blow pin group, 19, 19' is a rod, 20 is a frame for binding,
21, 21' are U-shaped legs.

Claims (1)

[Scope of utility model registration request] Multiple parison extrusion dies arranged in parallel 1 Underneath the same number of molds 2
A blowbin group 3, 3' with a rotating mechanism is attached to open/close and move up and down with opening/closing plates 2, 2' of the molds 2a, 2b, and can be moved laterally into and out of the lower position of the molds 2a, 2b alternately. A plate 22 is provided with a vertical movement mechanism for removing burr and pulling out the molded product by sandwiching the molded product at the lateral movement retreat position of the blow bin group.
1. A synthetic resin blow molding apparatus characterized in that a 22' is provided.