JPS6251400B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for manufacturing a tube for toy fireworks, in which a large number of inner plugs for sealing off explosives are mechanically attached to the inside of the tube for toy fireworks at the same time. be.

Conventionally, when manufacturing the tubes for toy fireworks, paper, red clay, sand, cement, etc. had to be manually filled in to attach the inner plug to seal off the gunpowder inside the tube, resulting in poor production efficiency and It was difficult to make the product uniform, such as the position of the stopper, the thickness, etc. being non-uniform.

In view of these drawbacks, the present invention provides a metering device in which a number of cylinders are fitted into a lower mold having a protrusion corresponding to a hole for attaching a fuse on the upper surface, and which is then positioned at an opposing position above the lower mold so as to be openable and closable. The filling material is filled into the measuring hole of the container, and then the upper mold corresponding to the lower mold is lowered to push the filling material in the measuring hole into the cylindrical body and compressed between it and the lower mold to form the inner stopper. An attempt was made to solve the above-mentioned drawbacks by opening the measuring device after forming and raising the upper mold, and lifting the receiving plate, which is movable up and down with respect to the lower mold, using a knock pin to release the cylindrical body from the mold. An embodiment of the present invention will be described below based on the drawings. 1, 1'... are made of paper and have a round, triangular, square,
It is a cylinder formed with an appropriate cross-sectional shape such as a polygon,
The cylindrical bodies 1, 1', . . . are configured so that a predetermined number of them can be grouped together when the inner stopper 2 is attached.

Reference numeral 3 denotes a press device, in which a die head 5 is placed and fixed on a table 4, and has an outer diameter corresponding to the inner diameter of the cylinders 1, 1', etc. on the upper surface of the die head 5, and an inner plug on the upper surface. The fuse 6 to be installed through the center of 2
The cylindrical body 1 to be fitted with the lower mold 9, 9', which has a protrusion 8 corresponding to the mounting hole 7 of the cylindrical body 1,
1'... are arranged corresponding to the arrangement state.

10 is a receiving plate placed on the upper surface of the die head 5, and the receiving plate 10 has holes 11, 11'... corresponding to the outer diameters of the lower molds 9, 9'... formed therethrough at corresponding positions. The lower molds 9, 9', etc. are configured to protrude upward by a predetermined height from the punched holes 11, 11', and are mounted on the lower surface of the receiving plate 10 so that they can be raised and lowered by appropriate lifting means. Knock pins 12, 12', . . . are opposed to each other, and the action of the knock pins 12, 12' causes the receiving plate 10 to be controlled to move up and down relative to the lower molds 9, 9', . Note that 13, 13'... are guide plates for positioning the cylindrical bodies 1, 1'... placed on the receiving plate 10.

Further, a fixed frame 14 having approximately the same height as the cylindrical bodies 1, 1', etc. placed from the upper end thereof is erected on the receiving plate 10, and lower molds 9, 9',... are mounted on the fixed frame 14. A measuring instrument 16 having measuring holes 15, 15', .

Reference numeral 18 denotes a board mounted on the lower surface of the press ram 19 which is controlled to move up and down, and on the lower surface of the board 18, an outer shape corresponding to the inner diameter of the cylinder bodies 1, 1' is formed at a position opposite to the lower dies 9, 9'. The upper molds 20, 20'... are made to hang down.

Next, to explain the method for manufacturing the toy firework cylinder according to the present invention, first, a predetermined number of cylinders 1, 1', etc. are grouped together and each cylinder 1, 1',... is placed on the receiving plate 10.
1' are placed along the guide plates 13, 13' so that they fit into the lower molds 9, 9', respectively, and then the measuring instrument 16 is placed closed on the fixed frame 14, and the measuring instrument Each metering hole 15, 15' in 16
A filler 21 is filled inside to form the inner plug 2. The filler 21 used is a mixture of 5-15% wood flour, 60-95% white cement, 2-10% glue and colored powder, mixed with a small amount of water.

After that, when the upper molds 20, 20'... are lowered, the filler material 21 in each measuring hole 15, 15'... is pushed into the cylindrical bodies 1, 1'... by the upper molds 20, 20', and the lower mold 9, 9'... is compressed to form the inner plug 2, and at the center of the inner plug 2 there is provided a fuse 6 for mounting in correspondence with the protrusion 8 of the lower mold 9, 9'... A hole 7 is formed.

Subsequently, after the molding is complete, the upper molds 20, 20'... are raised and returned, and the measuring instrument 16 is opened outward and reversed, and the dowel pins 12, 12' are made to protrude upward, so that the receiving plate 10 rises and the cylindrical body 1, 1'... rise together with the receiving plate 10 and are released from the lower molds 9, 9'.... Filler material 2 is added to the molded inner plug.
The adhesive in component 1 completely fixes the material to the cylinders 1 and 1', and exhibits sufficient strength after drying.

In short, the present invention involves fitting a number of cylindrical bodies 1, 1', etc. into a lower mold 9, 9', which has a protrusion 8 corresponding to a hole 7 for attaching a fuse 6 on the upper surface, and then fitting the lower mold 9, 9', etc. Since the filling material 21 is filled into the measuring holes 15, 15'... of the measuring instrument 16, which are positioned above and opposite to each other in a freely openable/closable manner, the filling material 21 is pushed into each cylinder 1, 1'... The amount of the filler 21 can be made uniform in advance, so that the amount of the filler 21 can be made uniform in advance.
The diameter and thickness of the inner stopper 2 formed by 1 can be made uniform, and the upper molds 20, 20' corresponding to the lower molds 9, 9' are then lowered to form the measuring holes 15, 15. Since the filling material 21 in the cylinders 1, 1', etc. is pushed into the cylinders 1, 1', and compressed between the lower molds 9, 9', to form the inner plug 2, a large number of cylinders 1. , 1'... At the same time, the inner plug 2 can be molded at a predetermined position, and the hole 7 for attaching the fuse 6 can also be formed through the hole 7 at the same time.
Also, after raising the upper molds 20, 20'..., the measuring instrument 1
6 is opened, and the receiving plate 10, which is arranged so as to be able to rise and fall freely relative to the lower molds 9, 9', is raised by the dowel pins 12, 12' to release the cylindrical bodies 1, 1', so that the filler material can be removed. The process from molding the inner plug 2 with the mold 21 to releasing the cylinders 1, 1', etc. can be performed mechanically, and compared to the conventional manual attachment of the inner plug 2, the work efficiency is significantly improved. It has great practical effects, such as being able to improve product quality and ensuring uniformity of product quality.

[Brief explanation of the drawing]

The figure shows one embodiment of the present invention.
The figures are a front view of the apparatus for producing a tube for toy fireworks according to the present invention, FIG. 2 is a plan view of the lower mold, FIG. 3 is a plan view of the receiving plate, FIG. FIG. 5 is an enlarged sectional view of the main part, and FIG. 6 is a sectional view of the cylindrical body. 1, 1'... cylinder body, 2... inner plug, 6... fuse, 7...
Hole, 8...Protrusion, 9,9'...Lower mold, 10...Socket plate, 1
2, 12'... Knock pin, 15, 15'... Measuring hole,
16... Measuring instrument, 20, 20'... Upper mold, 21... Filling material.

Claims (1)

[Scope of Claims] 1. A measuring instrument in which a number of cylinders are fitted into a lower mold having a projection corresponding to a hole for attaching a fuse on the upper surface, and then positioned oppositely above the lower mold so as to be freely openable and closable. The filling material is filled into the measuring hole of the cylinder, and then the upper mold corresponding to the lower mold is lowered to push the filling material in the measuring hole into the cylinder and compressed between it and the lower mold to form an inner plug. A squirt firework for a toy, characterized in that after the upper mold is raised, the measuring device is opened, and the receiving plate, which is arranged so as to be able to rise and fall freely relative to the lower mold, is raised by means of a knock pin to release the cylindrical body. How to make a tube. 2. A plurality of lower molds each having a protrusion corresponding to a fuse attachment hole formed on the upper surface thereof are arranged so as to protrude a predetermined height from the upper surface of the receiving plate which is controlled to raise and lower by means of a knock pin, and the lower molds are arranged in positions opposite to each other above the lower molds. An apparatus for producing a tube for a toy firework, characterized in that an upper mold corresponding to a lower mold is arranged so as to be freely raised and lowered.