JPH0442102Y2 - - Google Patents

Description

[Detailed description of the invention] <Technical field> This invention relates to a filling device for measuring pre-foamed granules, and when measuring the expansion ratio or specific gravity of pre-foamed granules used in foam molding, the pre-foamed granules are placed in a measuring cup. It relates to a device used to fill a certain amount of

<Prior art> The above-mentioned pre-expanded granules are obtained by heat-expanding expandable thermoplastic resin particles in a pre-expanding machine and pre-expanding them to a certain expansion magnification, and feeding the pre-expanded granules to a mold, A molded product is produced by heat-sealing within the mold cavity of a mold. In other words, at the stage of feeding the pre-expanded granules to the mold, the foam magnification is measured and adjusted within a certain numerical range, thereby accurately setting the foam magnification of the final molded product. This stabilizes the quality of the product. Therefore, the measurement and adjustment of the expansion ratio of pre-expanded granules is extremely important in the production of foam molded products.

Conventionally, in order to measure the expansion ratio of pre-expanded granules, a certain weight of pre-expanded granules that have been pre-expanded is packed into a measuring cup, and the volume is measured by reading the scale formed on the measuring cup. As a result, the specific gravity of the pre-expanded granules can be calculated, and by comparing that value with the specific gravity of the resin particles before pre-expanded, the expansion ratio of the pre-expanded granules can be measured.

However, when filling the measuring cup with the pre-expanded granules, if there is a gap between the pre-explosive granules, the apparent specific gravity becomes small, making it impossible to accurately measure the specific gravity. Therefore, the bottom of the measuring cup filled with pre-expanded granules was tapped or shaken to prevent gaps between the pre-explosive granules.

However, in the past, the above-mentioned work was done manually, so there were differences in the packing method depending on the working time, the skill of the worker, and the working method, resulting in large variations in the measurement results, and the firing magnification. There was a problem that made accurate adjustment difficult.

<Purpose> Therefore, the purpose of this invention is to solve the above-mentioned problems of the prior art, and to provide a filling device that can fill measuring cups with pre-expanded granules quickly and always with a constant degree of clogging. It provides:

<Structure> And, as a structure for achieving the above object, a vibration table formed with a fixing jig capable of installing and fixing a cup for measuring pre-exploded grains is installed on the upper surface of the foundation frame via a vibration isolating member, The vibration table is characterized in that a part thereof is equipped with a vibration mechanism that forcibly vibrates the vibration table.

<Example> Next, an example of this invention will be described below with reference to the drawings.

The figure shows the entire filling device, and 1 is a vibration table, which is installed on the upper surface of a base frame 2 via a vibration isolating rubber 3 so that it can elastically move or vibrate. Reference numeral 4 denotes a vibration generating mechanism, which is attached to a part of the vibration table 1 and forcibly vibrates the vibration table 1. As the vibration generating mechanism 4, a normal electromagnetic or air type vibrator can be used, and it is preferable that the operating time and the strength of vibration can be freely set.

Next, 5 is a measuring cup, a metal container,
Alternatively, it is made of a cup molded from synthetic resin such as polyethylene, and can accommodate a certain volume of pre-expanded grains B, and usually a cup with a capacity of about 2000 c.c. is used. Further, the measuring cup 5 is provided with a scale for measuring the filling volume of the pre-expanded granules B.

The measuring cup 5 can be placed and fixed on the vibrating table 1 by means of a fixing jig 6 formed on the top surface of the vibrating table 1. The fixing jig 6 may be one that has a recess into which the lower part of the measuring cup 5 can be fitted, as shown in the figure, or one that has protrusions that come into contact with appropriate places on the outer periphery of the measuring cup 5. When the measuring cup 5 is placed on the table 1 and the vibrating table 1 is vibrated, it is sufficient that the measuring cup 5 can be fixed so that it does not move or fall over. It can be freely changed according to the external shape of 5, etc.

To use the above-described filling device, a pre-expanded granule B that has been subjected to pre-exposure is filled into a measuring cup 5 by a certain weight, and then placed and fixed on a fixture 6 on a vibrating table 1. Then, actuate the vibration mechanism 4,
The vibration table 1 is forcibly vibrated to pack the preliminary foam particles B so that there are no gaps between them. At this time,
By appropriately setting the vibration time and strength of the vibration of the vibration generating mechanism 4, the degree of clogging of the preliminary foam particles B is always kept constant. That is, preliminary foam grain B
The degree of the gap between the pre-expanded grains B and the way the gap gets clogged due to vibration will vary depending on the type and size of the particles, so the vibration time and strength of the vibration should be adjusted. .

In this way, after filling the pre-foamed granules B with a constant degree of clogging, if the volume of the pre-foamed granules B is measured using the scale formed on the measuring cup 5, the specific gravity of the pre-foamed granules B is determined. Or firing magnification can be measured accurately.

<Effects> According to the filling device of this invention configured as described above, the filling work between the preliminary foam particles B in the measuring cup 5, which was conventionally performed manually, can be done by vibration. Since this is done by forcibly and mechanically vibrating the vibration table 1 by the mechanism 4, there is no variation in the degree of clogging due to changes in the operator or working conditions, unlike in the case of manual work, and the degree of clogging is always constant. The pre-expanded granules B can be filled with. In addition, since the vibration table 1 is placed on the upper surface of the foundation frame 2 via the vibration isolating rubber 3, the foundation frame 2 is not vibrated, and the vibration excitation mechanism 4 can freely control the vibration time and the strength of the vibration. Since it can be set, it can easily accommodate differences in the type and particle size of the pre-exploded grain B.
It also has excellent flexibility.

In addition, since the vibrating table 1 is equipped with a fixing jig 6 that can place and fix the measuring cup 5, even if a conventional measuring cup 5 is used,
It can be securely fixed on the vibration table 1, does not move or fall during vibration, and is easy to handle.

By being able to accurately set the degree of clogging of the pre-expanded granules B, the specific gravity or expansion magnification of the pre-expanded granules B can be measured very accurately, which is extremely effective in stabilizing and improving the quality of molded products. It is something that can contribute and has great practical value.

[Brief description of the drawings]

The figure is a schematic structural diagram of the entire device showing an embodiment of this invention. 1... Vibration table, 2... Foundation frame, 3... Anti-vibration rubber, 4... Vibration mechanism, 5... Measuring cup,
6...Fixing jig, B...Preliminary foam particles.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A vibration table formed with a fixing jig capable of mounting and fixing a cup for measuring preliminary foam particles is installed on the upper surface of the foundation frame via a vibration isolating member, and a part of the vibration table is is a filling device for measuring preliminary foam particles, characterized in that it is equipped with a vibration mechanism that forcibly vibrates a vibration table. 2. The filling device for measuring preliminary foam granules according to claim 1 of the above-mentioned utility model registration, wherein the fixing jig has a recess into which a lightweight cup can be inserted.