JPS61121912A - Highly efficient molding machine - Google Patents

Abstract

PURPOSE:To obtain the highly efficient molding machine capable of injecting products of two colors simultaneously by a method wherein a direct pressure type mold clamping device, equipped with respective two sets of left and right multi-stage molds, and two sets of injection units, injecting plasticized materials of same or different colors simultaneously or alternately, are provided in the molding machine. CONSTITUTION:Platens 6 for hot runner are provided at the left and right sides of a central fixed platen 1 on a base table 2 and the left and right injection units C are arranged on the slanted surface thereof. The mold clamping devices A, B are equipped with four sets of molds consisting of male mold 13 and female mold 12 between the fixed platen 1, fixed to a diver 10, and left and right movable platen 11. In case of injection, the nozzles 9 of the unit C are brought into nozzle touch 5, the plasticized materials of same or different colors, injected on a hot runner 6a, are injected into the cavity 4 through tips 3 abutted against a manifold 16 to mold them. According to this method, the highly efficient molding machine, capable of simultaneous injection of two colored products, may be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a molding apparatus that can injection mold two-color products with a high efficiency of at least two to four times that of conventional machines through one shot injection.

[Prior art]

Conventionally, molding machines using multi-stage molds are known from Japanese Patent Publications Nos. 48-41.016, 50-8109, and 5, which I previously provided.
There were various types such as No. 0-18023, but all of them were made of the same material, that is, molded products compatible with mold clamping force could only be injected in one molded product of one color. There was also an injection molding machine that used multiple nozzles, but it was not possible to mold two colors at the same time.

[Purpose of the invention]

In order to solve the above-mentioned drawbacks of the conventional molding machine, the present invention is capable of simultaneously or alternately injecting plasticized materials of the same color or two colors to the left and right mold clamps C, and also enables side injection, that is, injection of the molding machine, as in the conventional machine. Since the configuration is not T-shaped, the installation area can be reduced, and it has the molding function of four machines, but it can also be used as a linked multiple molding function, making it not only easy to operate and manage. The object of the present invention is to provide a molding machine which has a simple construction and can be made inexpensive, and the production cost of molded products can be reduced to a few fractions of a second.

[Outline of the invention]

In the present invention, injection units are arranged in two sets of left and right molds, and plasticized products of the same color or different colors can be injected simultaneously or alternately.In addition, the installation area of the molding machine can be reduced and the molded product can be produced with high efficiency (
= Something that can be molded.

[Embodiments of the invention]

Embodiments of the present invention will be explained in detail below with reference to the drawings.

FIG. 1 shows the implementation of the invention in plan view.

Both ends of the base 2 protrude 2', and the injection unit C9 is placed here.
C (hereinafter the same symbol will refer to only one side) are arranged on the slope from the left and right. The tip nozzle 9 of the injection unit C touches the hot runner surface plate 6 and injects. Mold clamping device brackets A and B are provided, and each of the molds 12 and 13 is opened into a cavity 4 through a chip 3 that is in contact with a manifold 16 provided on a surface plate 6 for a hot runner 6a. .

The above mold clamping device brackets A and B indicate a direct pressure mold clamping device consisting of a movable platen 11 connected to a direct pressure cylinder 14 and a ram 15, but a torque mechanism may also be used.
The operation is carried out by the hydraulic pump 7 on the part 2' that protrudes from the base on both sides.
Opening and closing of mold clamping by valve group 8, injection force, etc. are performed automatically, semi-automatically, etc., using timers, relays, limit switches, etc., as in the past.

〔Effect of the invention〕

The molding machine of the present invention includes a mold clamping device A having a four-stage multi-stage mold;
Since two units (B and injection unit with corresponding capacity) C are operated simultaneously or alternately, the minimum power source is utilized and the molding capacity is comparable to that of four conventional machines. In addition to being able to use two different materials, such as the same color or different colors for the left and right injection units, it also has the feature that the left and right mold clamping and injection can be used simultaneously or alternately.

[Brief explanation of drawings]

FIG. 1 shows a plan view showing the overall appearance of the molding machine of the present invention. ■...Central fixed plate, 2...Base 3...Tip, 5...Nozzle touch part 6-...
Surface plate for hot runner,

Claims (1)

[Claims] Hot runner surface plates are arranged on the left and right sides of the central fixed plate on the base, and the injection units are fixed to the slopes from the left and right toward these, and the same or different plasticized materials can be injected to the left and right sides of the hot runner surface plates. As shown, two sets of multi-stage molds and two injection units are respectively arranged, and the nozzles of the injection units touch each end of the hot runner surface plate, and each set of molds has two sets of multistage molds and two injection units on the left and right under the chips on the left and right sides of the manifold. The nozzle is touched to the assembled mold, and the plasticized material of the same color or different color is injected into the multi-stage mold all at once or alternately from the injection unit toward the multi-stage mold, which is clamped by operating under the intervention of a hydraulic pump and a group of valves. A high-efficiency molding machine that can inject.