JPS6082754A - Method and apparatus for molding nozzle section in solar water heater - Google Patents

Abstract

PURPOSE:To eliminate the need for a cutting work process, and to reduce the cost of the manufacture and assembly of a solar water heater by piercing a parison by using an inserting bar immediately before mold clamping after the parison is descended and molding a nozzle. CONSTITUTION:A box 16, which can be retreated, is projected and mounted by a spring shaft 15 having a fulcrum on a plate 14 on a split mold 4, an inserting bar 7 or an inner-surface regulating bar 8 vertically moved by a cylinder mechanism 17 is fitted into the box, a parison is descended between split molds 4, 4' from a die 1, and the split molds 4, 4' are brought close and moved and hold- down plates 13, 13 are butted immediately before the split molds are butted and the parison is held and held down. The inserting bar 7, etc. are descended and intruded at that time, and the parison is mold-clamped. With the inner-surface regulating bar 8, a step expanding section 8a is formed on the base section side, and it gives the inner surface of the nose section of a nozzle 5' to be molded an inclined plane, a nose thereof is expanded, or a step expanded surface 5a. Accordingly, no post-working is needed after molding in the nozzle 5', and a part 9 for connection can be inserted and pressure-bonded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a nozzle portion when a hot water storage tank and a heat collecting plate of a solar water heater are blow-molded using a synthetic resin material.

Solar water heaters mainly consist of a hot water storage tank and a heat collection plate that is a hollow Rin-shaped body that allows the entire stored water to flow through. Depending on the model, this heat collection plate and hot water storage tank have one on the bottom, left and right sides, and one on the top. Several nozzles are provided and are connected to each other by rubber hoses and to rubber hoses for water supply and drainage. During hollow molding, the nozzle installed on the bottom surface can be regulated internally with a mandrill or the like that is inserted smoothly into the butt-closed position (closed position) of the open/close mold, or insert molded connecting parts. However, because the nozzles installed on the left and right sides and the top cannot be inserted with a mandrill, conventionally, after molding, they are sent to a parallel line of a special machine, and the inner and outer surfaces of the nozzles are cut into perfect circles to create connection parts. This prevents water from leaking from the nozzle.

In the present invention, connection parts are insert-molded for the left and right side nozzles and the top nozzle, and the inner surface can be regulated to make it easy to insert.This eliminates the need for any cutting process and provides a nozzle that does not leak water. The company developed hot water storage tanks and heat collecting plates, which helped mass production of solar water heaters and reduced manufacturing and assembly costs.

To explain the drawings in detail below, the opening/closing side m4,4"i for hollow molding of the hot water storage tank 2 or heat collecting plate 3 is arranged under the parison feeding die 1. Figure 3 shows nozzle molding on the left and right abutting surfaces of the split mold. In the case where part 5 is provided, in this case, a support 6.6'f is erected on the outside of the butt side surface position of the split mold,
An insert rod 7 or an inner surface regulating rod 8 that moves forward and backward by a cylinder mechanism or the like is attached to the support column, and this rod is inserted into the nozzle forming section 5 through the parison immediately before the mold is clamped after the parison is lowered, and the nozzle 5' is formed. The next one is

A connecting part 9 is insert-molded into the nozzle 5', or is molded with its inner surface regulated so that it can be easily press-fitted after molding.

The same molding as described above can be achieved by attaching a support stand to one of the split molds and moving the insert rod etc. forward and backward, instead of having the pillars 6, 6' stand upright.

When insert molding the connecting part 9, use the nozzle 5'
Since paris adheres to the more protruding parts and its removal becomes a big problem, the present invention covers the protruding parts of the connecting parts in advance with a covering tube 10 before inserting the insert rod. In addition, as shown in FIG. 9, pinch-off 11'fr:
It is designed to make it easier to remove the stain without allowing it to accumulate.

Further, the insert rod 7 or the inner surface regulating frame 8 has an acute angle at its tip to facilitate the penetration of the descending parison.

Furthermore, a parison holding plate 1:l, which is movable by a cylinder mechanism or a spring 12, is attached to correspond to the nozzle molding part 5 of the opening/closing side panel 4.4', and clamps the descending parison just before the butt of the 10-piece mold 4.4'. The insert rod 7 or the inner surface regulating frame 8 is allowed to enter the nozzle forming part 5 while being held down.

Since the descending parison is clamped and held down by the holding plates 13, the insert rod 7, etc. that enters the descending parison will not dent or escape even if it pushes the descending parison, so there is no possibility of mis-explosion caused by the movement of the parison into a dent as shown in Fig. 7. In addition to being able to solve this problem, it also makes it extremely easy to mold the nozzle on the top surface, which was considered difficult especially when molding hot water storage tanks and heat collecting plates.

FIG. 17 shows the nozzle molding part on the upper surface. A box 16 that can be retracted by a spring shaft 15 having a fulcrum is attached to the plate 14 on one of the split molds 4, and a cylinder mechanism 17 is installed inside this box. An insert rod 7 or an inner surface regulating frame 8 is provided which moves up and down, and after the parison is lowered from the die 1 between the split molds 4 and 4', the split molds 4 and 4' are moved closer to each other until they are just about to butt together. The press plates 13 and 13 abut against each other to sandwich the parison, and the insert rod 7 and the like are lowered into the parison using nine press points, and then the parison is tightened. The above work is carried out in a flowing manner without interrupting the movement of the split molds.

After the deafening is done, the p-insert rod 7 and the like are pulled out by the cylinder mechanism. One to several nozzles 5' can be obtained by inserting connecting parts 9 or by restricting the inner surface of the removed hot water storage tank or the like. The connecting part 9 is pipe-shaped, and has an acute angle ring 9a attached to the outer surface of the part that protrudes from the nozzle 5', and a protruding ring 9b provided on the outer periphery of the part into which the tyt is inserted. I try to fit it tightly.

When the connecting part 9 is made of synthetic resin, the protruding ring 9b is melted during insert molding, and the integrated insertion of the part 9 can be made even stronger.

The inner surface regulating frame 8 is provided with a stepped enlarged portion 8a on the base side, so that a tapered slope or stepped enlarged surface 5a is attached to the inner surface of the tip end of the nozzle 5' to be molded. In this way, after the nozzle 5' is molded, the connecting part 9 can be inserted and crimped without the need for post-cutting processing.

Thus, according to the present invention, when hollow-molding a hot water storage tank and a heat collecting plate, the nozzles on the bottom surface, left and right side surfaces, and the top surface are molded by inserting the connecting part 9 or regulating the inner surface. This has the effect of completely eliminating the need for the process of cutting the inner and outer surfaces of the nozzle portion and its equipment line, and has the effect of further reducing the cost of the solar water heater.

[Brief explanation of drawings]

Fig. 1 is a front view of the hot water storage tank, Fig. 2 is a plan view of the heat collecting plate, and Fig. 5 is a front view showing an example of inserting an inner regulating rod into the nozzle molding part provided on the abutting side surfaces of the open/close split mold. Figure, 4th
The figure is a partially enlarged cross-sectional view when entering, Figure 5 is a cross-sectional view when the mold is clamped, Figure 6 is a cross-sectional view showing an example of inserting the connecting parts, and Figure 7 is the same, inner surface regulation Figure 8 is a cross-sectional view showing a defective example, Figure 8 is a cross-sectional plan view showing an example of preventing flakes during insert molding, Figure 9 is a longitudinal cross-sectional view showing an example of flaking separation, Figure 10 is a mold clamping example. 11 is a cross-sectional view showing the state in which the descending parison is held in the front; FIG. 11 is the same; a partial side view;
The figures are the same, a partial cross-sectional view showing an example of entry of the insert rod or the inner surface regulating rod, Fig. 13 is the same, a cross-sectional view showing the mold clamping state, Fig. 14 is the same, a side view, and Fig. 15 is the 10th 16 is a cross-sectional view showing the second example, FIG. 16 is a partial side view, FIG. 17 is a longitudinal sectional front view showing an example of molding the upper nozzle, FIG. 18 is a partial plan view, 1 is a die, 2 is a hot water storage tank, 3 is a heat collecting plate, 4, 4' is an open/close split mold, 5U nozzle molding part, 6, 6
' is a column, 7 is an insert rod, 8 is an inner surface regulating rod, 9 is a connecting part, 1O is a covering tube, 11 is a pinch-off %, 12 is a spring. 13 is a holding plate, 14 is a plate, 15 is a spring shaft,
16 is a box, and 17 is a cylinder mechanism. Patent applicant Yoji Araki

Claims (1)

[Scope of Claims] 1o When hollow-molding the hot water storage tank and heat collection plate of a solar water heater using synthetic resin material, the hot water storage tank is formed on the left and right sides and during the butt of the opening and closing split mold for forming the heat collection plate. An insert rod or inner surface regulating rod that penetrates the descending parison and enters the nozzle molding part provided on the upper surface or a part thereof,
Insert molding the connecting parts on the inner surface of the nozzle, or molding the connecting parts after molding by regulating the inner surface in a shape that makes it easy to press fit,
A method for forming a nozzle part in a solar water heater, characterized by forming a nozzle part in a solar water heater, or a combination thereof. 2. The method according to claim 1, characterized in that the insert rod or the inner surface regulating rod sandwiches and holds down the descending parison, and then penetrates and enters. 3. Nozzle molding provided on the left and right sides and the top surface or a part thereof between the butts of the opening/closing mold for molding in equipment for blow-molding hot water storage tanks and heat collecting plates of solar water heaters using synthetic resin materials. A molding device for a nozzle part in a solar water heater, which is characterized in that an insert rod or an inner surface regulating rod and its support mechanism are installed to break through a descending parison to the outside and enter a nozzle molding part, corresponding to the part. 4. A mechanism to clamp and hold down the falling parison before the opening and closing molds are brought together is installed on the left and right side surfaces of the hot water storage tank and the heat collecting plate, which are completely hollow-formed, and on the outer surface corresponding to the nozzle molding part on the top surface. An apparatus according to claim 3, characterized in that: 5. The insert rod has a covering tube that prevents debris from adhering to the connecting parts protruding from the insert molding nozzle, and the opening/closing part corresponding to the covering tube facilitates cutting off the debris. 5. The device according to claim 3, further comprising a pinch-off mechanism for the purpose of the invention.