JPH0553908U - Multi-component synthetic resin mist type mixing and injection machine - Google Patents

Abstract

(57) [Abstract] [Purpose] Proposal of a mist-like mixing and injection machine for multi-component synthetic resins that can evenly inject foamed materials into narrow and narrow overflows without causing molding defects such as defective filling. To do. [Composition] Respective inlets 2 for a plurality of resin components
2, 24 and an inlet 26 for mixed air, a thin and wide diffusion passage 35 provided through the inlets and inlets 30 for the respective resin components, and communicates with the diffusion passage. A plurality of radial flow paths 40, a mist mixing chamber 45 which is provided at the tip of the radial flow path and which communicates with the inlet of the mixed air, and a mist discharge part 50 formed in the front part of the mist mixing chamber. Have.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a mixing device for multi-component synthetic resins, and more particularly to an injector for mixing a relatively small amount of resin material in a mist form.

[0002]

[Prior Art]

 For example, when molding polyurethane resin, multiple resin components that react with each other are supplied to the mixing part together with the mix air from the respective inflow parts, and mixed, and the foamy mixed liquid component is injected into a predetermined molding die or the like. A so-called froth type mixing and injection machine is used.

An example of this type of conventional froth type mixing and injecting machine 100 will be described with reference to FIG. 8. Reference numeral 111 in the figure is a head block, 112 is a flow mixer, and 113 is a tightening block. It flows into the inflow part 130 from each inflow port 122,124 via each inflow path 121,123 formed in the head block 111. At this time, the inflow path 123 is provided with the inflow port 126 for the mix air, and the mix air flows into the inflow part 130 together with the resin component. A flow mixer 112 is provided in the inflow section 130 as shown in the figure, and each resin component and mixed air flow into the mixing chamber 145 from the radial flow path 140 of the flow mixer 112 and are mixed in the form of bubbles.

The mixed components mixed in the form of foam are injected into a predetermined mold or the like from the discharge passage 151 of the discharge unit 150 mounted at the tip of the mixing chamber 145.

By the way, in recent years, for example, when molding a foamed panel or the like, both side ends of the panel may be bent inward to form a fitting step or a convex / concave portion for connecting the panel bodies. In such a foamed panel, both side ends of a face material such as a metal plate are bent inward in advance to form a narrow overflow portion, and the foam material is introduced onto the face material and into the narrow overflow portion. It is molded integrally.

However, in the narrow overflow portion, it is difficult to reliably spread the material to the inside when introducing the foamed material, and when a conventional mixing and injection machine is used, there is a lack of wall thickness in the narrow overflow portion. In some cases, defective filling such as parts and air pockets may occur, resulting in defective products.

Therefore, in order to solve the poor filling of the foamed material, it has been proposed to introduce a large amount of foamed material and fill the narrow overflow portion by the foaming pressure, but this method reduces the amount of resin consumed. Not only the cost becomes higher, but there is a problem that the foam material overflows to the outside of the face material and the flow into the narrow overflow portion becomes uneven.

[0008]

[Problems to be solved by the device]

 In consideration of such a situation, the present invention can evenly inject a foam material into a narrow and narrow overflow portion, and does not cause molding defects such as poor filling, and is a mist-like mixture injection machine for multi-component synthetic resin. Is to be proposed.

[0009]

[Means for Solving the Problems]

 That is, the multi-component synthetic resin mist-like mixing / injecting machine mixing device proposed here comprises an inlet for each of a plurality of resin components and an inlet for mixed air, and an inlet for each of the resin components. A thin and wide diffusion channel provided through an inlet and an inflow portion, a plurality of radial channels communicating with the diffusion channel, and a plurality of radial channels communicating with the inlet of the mixed air and at the tip of the radial channel. The present invention relates to a mist-shaped mixing and injecting machine for a multi-component synthetic resin, which has a mist mixing chamber provided and a mist discharge part formed in the front part of the mist mixing chamber.

[0010]

【Example】

 Embodiments will be described below with reference to the accompanying drawings. FIG. 1 is a cross-sectional view showing an embodiment of a mist-like mixing and injecting machine for a multi-component synthetic resin according to the present invention, FIG. 2 is a vertical cross-sectional view showing the main part thereof, and FIG. 3 is a cross-sectional view taken along line 3-3 of FIG. FIG. 4 is a sectional view taken along line 4-4 of FIG. 2, FIG. 5 is a sectional view taken along line 5-5 of FIG. 1, and FIG. 6 is a schematic side view showing an example of manufacturing a foam panel using the device of the present invention. FIG. 7 is an enlarged cross-sectional view of the relevant part.

The mixing and injecting machine 10 of the present invention is one of the flow type mixing devices for polyurethane resin, and it relates to a mist-like mixing and injecting machine which discharges a relatively small amount of foamy mixed components, and its main part is a head block 11 A flow mixer 12 mounted inside the head block and a tightening block 13 for fixing the flow mixer 12 to the head block 11 are included. Reference numerals 61 and 62 are supply conduits for a plurality of reactive resin components A and B, which are raw material components of the polyurethane resin, 63 is a supply conduit for mixing air, and 64 is a connecting portion of each conduit.

As shown in FIGS. 2 and 3, the multi-component synthetic resin mixing and injecting machine 10 of the present invention includes respective inlets 22 and 24 for a plurality of resin components and an inlet 26 for mixed air. It has a diffusion channel 35, a radial channel 40, a mist mixing chamber 45, and a mist discharge part 50.

The head block 11 includes resin flow paths 21 and 23 for the resin components A and B and an air flow path 25 for mixing air C.

Inflow ports 22 and 24 are formed at the tips of the flow paths 21 and 23 and the air flow path 25, and open to the inflow portion 30. The inflow portion 30 communicates with a thin and wide diffusion channel 35 formed between the head block 11 and the flow mixer 12. The diffusion channel 35 is effective in producing a small amount of resin component in the form of mist, and its clearance is formed to 0.5 mm. Reference numeral 31 is a packing such as an O-ring.

The diffusion channel 35 communicates with the radial channel 40. As shown in FIG. 4, a plurality of radial flow paths 40 are provided radially in the flow mixer 12, and are concentrated and open in a mist mixing chamber 45 formed in the center of the flow mixer 12.

In this example, the radial flow passages 40 are composed of four first radial flow passages 40A formed on the upper side of the flow mixer 12 and four second radial flow passages 40B formed on the lower side. It is configured. The resin components A and B are efficiently mixed through the radial flow passages 40A and 40B.

The mist mixing chamber 45 is connected to the air inlet 26 as well as the radial passage 40, and mixes the resin component introduced from the diffusion passage 35 with air to generate a mist-like mixed component. To do.

The discharge part 50 is attached to the tightening block 13 and has a discharge passage 51 communicating with the mist mixing chamber 45. The mist-like mixed components produced in the mist mixing chamber 45 are ejected from the ejection unit 50 into a predetermined mold. As shown in FIG. 5, the discharge part 50 is formed in an elongated nozzle shape in order to reliably fill the resin component in the narrow overflow part, and the bent part 55 is formed at the tip thereof. .. By forming such a nozzle shape, the injection machine 10 is preferably used as a preliminary injection machine for filling the synthetic resin foam material into the narrow overflow portion in the foam panel manufacturing.

An example of manufacturing a foamed resin panel using the device of the present invention will be described with reference to FIGS. 6 and 7. In the figure, reference numerals 70 and 70 denote an injector according to the present invention, 71 a known main injector for main injection, R1 a lower coil that sends a lower side material 72, R2 an upper coil that sends an upper side material 73, and 90. Is a lower conveyor, 91 is an upper conveyor, and P is a synthetic resin foam material. The manufacturing example of the foamed panel shown here includes a pre-injection process using the injection machine of the present invention and a main injection process.

As shown in the figure, the lower side material 72 is continuously supplied from the lower coil R 1 by the lower conveyor 90, and the upper side material 73 is continuously supplied from the upper coil R 2 by the upper conveyor 91. As can be better understood from FIG. 7, the end portions 74 and 75 of the face members 72 and 73 each have a narrow overflow portion 76 that is bent inward.

A mist-shaped mixing and pouring machine 70 according to the present invention for performing preliminary injection is provided between the face materials 72 and 73, and the face materials 72 and 73 are continuously fed out. The synthetic resin foam material P and air are mixed in advance into the narrow overflow portion 76 in the form of mist and injected. At this time, the supply pressure of the synthetic resin foam material P is set to, for example, 3 to 4 kg / cm ² . Then, the mixed air is less than the supply pressure of the synthetic resin foam material P by 0. It is preferable to set it higher by about 5 kg / cm ² .

As can be seen from the figure, in this embodiment, since the discharge part 77 of the mixing and injecting machine 70 has the bent part 78 which enters the narrow overflow part 76 of the face material 72, the synthetic resin foaming is performed. The material P can be evenly injected all the way to the narrow overflow portion 76. Reference numeral 80 in the figure is a bracket for fixing the injection position of the mixing and injection machine.

[0023]

[Effect of the device]

 As shown and described above, according to the mixing and injecting machine of the present invention, the resin component can be sprayed in a mist form, so that it is possible to evenly inject the foamed material even into a narrow narrow overflow portion. Instead, it can be injected in any direction such as sideways or upward, and does not cause defective filling of resin material in foam panel manufacturing or defective adhesion due to formation of air pockets. Therefore, it is not necessary to inject an extra resin material, the increase in manufacturing cost can be suppressed, and it is extremely effective in quality control.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a mist-shaped mixing / injecting machine for multi-component synthetic resin according to the present invention.

FIG. 2 is a vertical sectional view showing the main part thereof.

3 is a sectional view taken along line 3-3 of FIG.

FIG. 4 is a sectional view taken along line 4-4 of FIG.

5 is a cross-sectional view taken along line 5-5 of FIG.

FIG. 6 is a schematic side view showing an example of manufacturing a foam panel using the device of the present invention.

FIG. 7 is an enlarged cross-sectional view of the relevant part.

FIG. 8 is a vertical cross-sectional view showing a main part of a conventional flow type mixing and injection machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Mixing device 11 Head block 12 Flow mixer 13 Clamping block 21 Resin component flow path 22 Inflow port 23 Resin component flow path 24 Inflow port 25 Air flow path 26 Inflow port 30 Inflow part 35 Diffusion flow path 40 Radial flow path 45 Mist mixing chamber 50 Discharge part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Haruki Castle Fujii, 3-2-1, Hakaseminamishinmachi, Amagasaki City, Hyogo Prefecture Daido Steel Sheet Co., Ltd. No. Daido Steel Plate Co., Ltd. (72) Inventor: Hideyoshi Nishikori 32-1 No. 3-Kanze Minamishinmachi, Amagasaki City, Hyogo Prefecture Daido Steel Plate Co., Ltd.

Claims (3)

[Scope of utility model registration request] 1. An inlet (22, 24) for each of a plurality of resin components and an inlet (2 for mixed air).
6), and an inlet and an inlet (3) for each resin component
0) and a wide and wide diffusion channel (3
5) and a plurality of radial flow paths (4
0), a mist mixing chamber (45) communicating with the inlet of the mixed air and provided at the tip of the radial flow path, and a mist discharge part (50) formed in the front part of the mist mixing chamber.
A mist-like mixing and injecting machine of multi-component synthetic resin, characterized by having. 2. The mist-shaped mixing and injecting machine according to claim 1, wherein the mist discharge part has a slender nozzle shape. 3. The mist-like mixing and injecting machine according to claim 2, wherein the tip of the mist discharge portion is bent.