JP-7855769-B2 - injection molding machine
Inventors
- 木村 淳一郎
Assignees
- 芝浦機械株式会社
Dates
- Publication Date
- 20260508
- Application Date
- 20250708
Claims (3)
- An injection device that melts a resin material in an injection cylinder in which a screw is positioned inside, and injects the molten resin material from a nozzle, A pivot pin is provided to connect the injection device to the base on which the injection device is mounted, so as to allow the injection device to rotate. A fixed die to which a mold for molding the resin material injected from the nozzle is attached, A plurality of nozzle touch rods are arranged parallel to the extending direction of the injection cylinder in the state in which the resin material is injected from the nozzle into the mold, and one end of each is connected to the surface of the fixed die on the injection device side. A housing is provided, which is positioned spaced apart from the fixed die and to which a plurality of nozzle touch rods are connected at a position away from the fixed die, and to which the injection device is rotatably connected by a connecting pin positioned on the axis of the pivot pin, Equipped with, An injection molding machine characterized in that the multiple nozzle touch rods are arranged at positions above and below the injection cylinder.
- Each of the multiple nozzle touch rods has a threaded portion formed on it, Multiple nuts are screwed onto the threaded portion of the nozzle touch rod and are rotatably supported by the housing, and move in the axial direction of the nozzle touch rod together with the housing by rotating relative to the threaded portion, A plurality of pulleys are attached to each of the plurality of nuts so as to be rotatable together with the nut, A drive motor mounted on the housing, A transmission belt is wrapped around a plurality of the aforementioned pulleys and rotates the pulleys by transmitting driving force from the drive motor to each of the aforementioned pulleys, The injection molding machine according to claim 1, comprising:
- The nozzle touch rod is connected to the fixed die so as to be movable relative to the nozzle touch rod in the extending direction, The injection molding machine according to claim 1 or 2, wherein the rod connecting portion has a biasing member that applies a biasing force to the nozzle touch rod from the side where the injection device is located to the side where the fixed die is located in the extending direction of the nozzle touch rod.
Description
This invention relates to an injection molding machine. Some injection molding machines, which perform molding by injecting molten resin from an injection cylinder into a mold, are equipped with a nozzle touch mechanism that ensures the nozzle, the part that injects the molten resin into the mold, makes proper contact with the mold. For example, the injection molding machine described in Patent Document 1 uses multiple nozzle touch guide rods, which support the injection unit, mounted on the rear platen via air cylinders. The air cylinders then perform nozzle touch and sprue break operations. Furthermore, while some injection molding machines have injection cylinders that extend horizontally, some injection molding machines are designed with high maintainability in mind. For example, the injection molding machine described in Patent Document 2 allows the injection device to be rotated around a support pin connecting the base and the injection device. This allows the injection device to be rotated when checking or maintaining the nozzle that injects the molten resin. Japanese Patent Application Publication No. 10-100199Japanese Patent Publication No. 2010-111020 Figure 1 is a perspective view of the main parts of an injection molding machine according to an embodiment.Figure 2 is a side view of the main parts of an injection molding machine according to an embodiment.Figure 3 is a plan view of the main parts of an injection molding machine according to an embodiment.Figure 4 is a cross-sectional view taken along line A-A in Figure 3.Figure 5 is a detailed view of the area around the injection bracket shown in Figure 4.Figure 6 is a cross-sectional view taken along line B-B in Figure 5.Figure 7 is a cross-sectional view taken along line C-C in Figure 5.Figure 8 is a cross-sectional view taken along line D-D in Figure 5.Figure 9 is an explanatory diagram showing the injection device shown in Figure 4 in an advanced position.Figure 10 is a plan view showing the injection device rotated around the pivot pin and connecting pin. The embodiments of the injection molding machine according to this disclosure will be described in detail below with reference to the drawings. However, this embodiment does not limit the invention. Furthermore, the components in the following embodiments include those that are substituted and readily conceivable by those skilled in the art, or that are substantially identical. [Embodiment] Figure 1 is a perspective view of the main part of the injection molding machine 1 according to the embodiment. Figure 2 is a side view of the main part of the injection molding machine 1 according to the embodiment. Figure 3 is a plan view of the main part of the injection molding machine 1 according to the embodiment. In the following description, the vertical direction in the normal operating state of the injection molding machine 1 will be described as the vertical direction Z in the injection molding machine 1, the upper side in the normal operating state of the injection molding machine 1 will be described as the upper side in the injection molding machine 1, and the lower side in the normal operating state of the injection molding machine 1 will be described as the lower side in the injection molding machine 1. In the following description, the longitudinal direction Y of the injection molding machine 1 will also be described as the longitudinal direction Y in each part having the injection molding machine 1, and the direction perpendicular to both the vertical direction Z and the longitudinal direction Y of the injection molding machine 1 will be described as the width direction X in the injection molding machine 1. <Injection molding machine 1> The injection molding machine 1 according to this embodiment is configured to include a base 5, an injection device 10 and a mold clamping device 60, etc., which are arranged on the base 5. The base 5 is formed in the shape of a substantially rectangular parallelepiped, with its longitudinal direction being the longitudinal direction Y of the injection molding machine 1, and a first rail 6 is arranged on the upper surface of the base 5. Two first rails 6 are arranged on the base 5 spaced apart in the width direction X, and both first rails 6 are formed to extend along the longitudinal direction of the base 5. The injection device 10 is mounted on the first rails 6 so as to be movable along the extending direction of the first rails 6, thereby allowing the injection device 10 to move in the longitudinal direction Y. The clamping device 60 is positioned on the base 5, on one side of the injection device 10 in the longitudinal direction Y. The clamping device 60 includes a clamping mechanism that opens and closes the mold 63 assembled to the clamping mechanism. A servo motor drive system is preferred for the clamping device 60, but a hydraulic drive system may also be used. <Injection device 10> In the following description, the side in the longitudinal dir