JPS61285046A - Forming method for flat motor - Google Patents

Abstract

PURPOSE:To relax restrictions in use to pot life and shorten a setting time, by a method wherein the main agent and the reaction accelerator of thermosetting resin for molding are arranged to be separately stored in the respective vessels, and wherein they are quantitatively mixed together immediately before molding, and wherein they are injected into a metallic mold. CONSTITUTION:When the armature windings of a flat motor 17 are molded with thermosetting resin, then the thermosetting resin is divided into the main agent 11 and the reaction accelerator 12, and they are arranged to be separately stored in the respective vessels 1 and 2. Immediately before molding, the main agent 11 and the reaction accelerator 12 are quantitatively fed to a mixer 6, and molded resin 19 is produced by mixing them together, and the resin 19 is injected into a molding space 16 in a heated metallic mold 20. By this method, the reaction accelerator can be used without worrying about the pot life, and so the setting time can be extremely shortened.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The invention relates to a method for molding an armature winding of a flat motor using a thermosetting resin. [Prior Art] Conventional , thermosetting resins used for molding flat electric motors are disclosed in Japanese Patent Application Laid-open No. 52-23601 and Japanese Patent Application Laid-open No. 56-916.
Epoxy resins are often used in the constructions shown in Japanese Patent Application Laid-open No. 60 and Japanese Patent Application Laid-Open No. 56-44359. Again 1
．． When used, a transfer molding method is generally used in which epoxy resin, curing agent 9 reaction accelerator, mold release agent, filler, etc. are mixed in advance, and this is pumped into a heated mold during molding and hardened. .

To be more specific, the conventional flat type 1! As a transfer molding material for molding the armature winding of the machine, an epoxy resin such as Fresol Nozerac type epoxy tree IJi & EOcN103 (product of a certain Nippon Ka Co., Ltd.) is used.
0 parts by weight and phenol gelatin PSF as a hardening agent.
4300 (product of Gunei Chemical Co., Ltd.) as 50 parts by weight and 1 reaction accelerator as 2-functional methyl-4-methylimidazole of amines.
1 part by weight of E4MZt-1, 2 parts by weight of zinc stearate as a mold release agent, and 250 parts by weight of fused silica Fuselex RD8 (product of Tatsumorisha) as a filler at 80°C.
Mix for 10 minutes, cool, and then crush. This is then weighed and pressed again into a tablet shape, and stored at a low temperature of 10° C. or lower to prevent the reaction from proceeding as much as possible until it is used for molding. When used, the resin is heated and softened again to about 80 DEG C., a pressure of 70 to 100 KV- is applied using a transfer molding machine, and the resin is hardened in a mold at 180 DEG C. for about 5 minutes.

After curing, the molded product is taken out.

[Problem that the invention seeks to solve]

As described above, conventional molding materials contain an amine-based reaction accelerator that can be transferred to a mold and cured in a short time.

For this reason, the reaction progresses gradually even around room temperature, and eventually the product becomes unusable (hereinafter, this is referred to as pot life).

). Also, for this reason, despite its excellent properties as a molding material, it could not be used in practice, and the use of the material was restricted.

The present invention was developed in order to eliminate the above-mentioned problems, and provides a method for molding a flat electric motor that can be cured in a short time in a mold and that can suppress usage restrictions due to pot life. The purpose is to obtain.

[Means for solving problems]

In the method for molding a flat type electric motor according to the present invention, the base material and the reaction accelerator are placed in separate storage containers, and the mixture is quantitatively mixed before being poured into a mold.

[For production]

In the method for molding a flat electric motor according to the present invention, the main ingredient and the reaction accelerator are separated during storage, so reactions during storage are prevented and restrictions on the use of materials due to pot life are suppressed.

〔Example〕

Hereinafter, embodiments of the invention will be described with reference to the drawings.

In the figure, 1 is a main agent container for storing the main agent 11 of the molding material, 2 is an accelerator container for storing the reaction accelerator 12 that accelerates the reaction and improves the curing rate, and 3 is for pumping the main agent 11 into the mold 20. The main agent side inlet port 4 was provided in the main agent container 1 to supply pressurized air, and the inlet 4 was provided in the accelerator container 2 to supply pressurized air for pumping the reaction accelerator 12. Accelerator side introduction port, 5, main agent 11 and reaction accelerator, 1
2 is an injection port that connects the mixture to the mold 20, 6 is a mixer that mixes the base agent 11 and the reaction accelerator 12, and 7 is the base agent 1.
1 and the reaction accelerator] A fixed protrusion fixed to the inner part of the mixer 6 in order to efficiently mix 2; 8 is a rotating protrusion fixed to the rotating shaft 9 for the same purpose; It is rotatably inserted from the opposite side of the inlet 5. 10 is the mixing space% in the mixer 6 for mixing the main agent 11 and the reaction accelerator 12
13 is an accelerator outlet for injecting the reaction accelerator 12 into the mixing space 10, 14 is an upper mold of the mold 20 to be molded, 15 is a lower mold thereof, and 16 is a molded flat electric motor 17 (armature winding of the same). A molding space, 18 is a resin thickness inlet for injecting a molding resin 19 into a mold 20, and 19 is a molding resin in which a base resin 11 and a reaction accelerator 12 are mixed.

Next, a method of forming (the armature winding of) the flat electric wJ iso 17 will be described. As the main agent 11, bisfelt type epoxy resin Epicoat 828 (product of Shell Chemical Co., Ltd.) was used.
80 parts by weight of methylhexahydrophthalic anhydride HN3500E (manufactured by Hitachi Kaji Co., Ltd.) as a hardening agent, and 400 parts by weight of fused silica Fuselex RD 8 (manufactured by N Mori Co., Ltd.) as a filler. Weigh the whole thing and
After vacuum degassing and mixing at 40° C. for 10 minutes, this base ingredient 11 is placed in the base ingredient container 1. Since the main ingredient 11 is not mixed with the reaction accelerator 12, the reaction does not proceed gradually during the storage of the sea urchin, and the usable time is not limited. while 1 reaction accelerator 12 1 benzyl 2 methylimidazole IB
2Pour IviZ (Shikoku Kayakusha product) into accelerator container 2. Next, a flat electric motor 17 is mounted on a hydraulic press (not shown) to open the heated upper mold 14 and lower mold 15 and to perform molding therebetween. Then, close the upper mold 14 and lower mold 15,
The injection port 5 and the resin introduction port 18 are connected and waited in this state until the resin is injected. Next, pressurized air is added to the inlet port 3 on the second agent 11 side and the inlet port 4 on the accelerator 12 side. The main agent 11 and the reaction accelerator 12 are the main agent 100? Each container 1.2 is adjusted so that 0.32 L of the reaction accelerator 12 flows out, and a predetermined amount flows into the mixing space 10 in the mixer 6. Here, in order to uniformly mix the base agent 11 and the reaction accelerator 12ft, the rotating shaft 9 is rotated at 500 revolutions per minute using an electric motor or the like (not shown). The rotating protrusion 8 attached to the rotating shaft 9 rotates while keeping a small distance from the fixed protrusion 7, and mixes the base agent 11 and the reaction accelerator 12. The molded resin 19 formed by this mixing has high reactivity, and there may be a pot life problem, but since the volume of the mixing space 10 is almost equal to the volume of the molding space 16, the molded resin 19 after mixing can be used immediately for molding without any problems. For example, if the molding cycle is 5 minutes, the time used for molding after the base material 11 and reaction accelerator 12 are mixed is within 5 minutes. Next, the molded resin 19 is applied to the resin inlet 1 by the pressure of the pressurized base resin container 1.
8 and flows into the molding space 16. Since the upper mold 14 and the lower mold 15 of the mold are heated to 180° C., the molding resin 19 therein hardens in 3 to 5 seconds. When the molded resin 19 hardens, the pressurization of the base agent container 1 and the accelerator container 2 is stopped, and
The injection port 5 is moved backward and separated from the mold 20. Since the molding resin 19 becomes hard in 30 to 60 seconds, the upper mold 14 and the lower mold 1
5 and take out the molded flat electric motor 17.

In the above embodiment, pressurized air was used as a means for pushing out the base agent 11 and the reaction accelerator 12, but the method is not limited to this, and for example, a cylinder such as a syringe may be used to discharge the liquid in a fixed amount. Also good.

〔Effect of the invention〕

According to the present invention, the main component of the thermosetting resin and the reaction accelerator are stored separately, and these liquids are mixed in a quantitative manner just before use, so that the mold during molding is Not only does it have quick curing properties in the mold, resulting in excellent productivity, but it also allows for ideal molding, since the use of resin is greatly restricted due to pot life.

[Brief explanation of the drawing]

The figure is a sectional view of an apparatus according to the method of the present invention. DESCRIPTION OF SYMBOLS 1... Main agent container, 2... Accelerator container %5... Inlet, 6... Mixer, 11... Main agent, 12... Reaction accelerator. 16... Molding space, 17... Flat electric motor, 18.
... Resin inlet % 19... Molding resin % 20... Mold. Agent Masu Oiwa 32o: Showa year month day 3. Relationship with the case of the person making the amendment Patent Applicant Address 2-2-3 Marunouchi, Chiyoda-ku, Tokyo Name (601) Mitsubishi Electric Corporation Representative Kajishi:
==t: Part 4, Agent: 5, Date of amendment order (shipment date) 6, Column for brief explanation of drawings of the specification to be amended, and drawings. 7. Contents of the amendment (complete) "Diagram" on page 8, line 17 is amended to "Figure 1". 1. Procedural amendment (voluntary) 3. Person making the amendment 5. Detailed description of the invention of the specification to be amended. Correct “Figure” to “#!1 Figure”.

Claims (2)

[Claims] (1) In a method of molding a flat motor in which the armature winding of a flat motor is molded using a thermosetting resin, the main component of the thermosetting resin and the reaction accelerator are stored separately in separate containers, and immediately before molding. A method for molding a flat motor, characterized in that these two liquids are mixed in quantitative quantities and injected into a heating mold in which an armature winding is arranged. (2) Claim 1, characterized in that the base material is formed by mixing an epoxy resin, an acid anhydride curing agent, and an inorganic filler, and the reaction accelerator is formed from a liquid imidazole compound. A method of forming a flat type electric motor.