CN200977715Y - Straight driving injection machine liftout attachment - Google Patents

Abstract

The utility model relates to a direct-drive injection molding machine ejector device, which includes a thimble guide plate; and is characterized in that: it also includes more than two guide rods with one end fixed on the template, and the other end of the guide rods passes through the thimble guide plate and fits in a gap; It includes more than two thimble rods with one end fixed on the thimble guide plate, and the other end of the thimble rod passes through the template and is clearance-fitted; it also includes a screw pair and a motor that drives the movement of the thimble guide plate; the motor includes a motor housing, a motor back cover, The motor rotor, the motor winding and the sliding device set outside the motor rotor; the screw pair passes through the motor rotor and fits with its thread, and one end of the screw pair is fixedly connected with the thimble guide plate; it also includes a bracket fixed on the template, and The casing is fixed on the support. The power of the utility model is directly transmitted to the thimble plate through the screw pair, the energy loss is small, the transmission efficiency is high, the transmission links are few, the power transmission response is fast, the motion precision is high, the control is more sensitive, the structure is simplified, the space is saved, and the number of parts is small , the manufacturing cost is reduced, and the maintenance is convenient.

Description

Direct Drive Injection Molding Machine Ejection Device

technical field

The utility model relates to a direct-drive injection molding machine ejector, which belongs to the technical field of plastic injection molding equipment, and can also be applied to metal die-casting equipment, rubber molding equipment, presses or other equipment with mold clamping mechanism ejectors. middle.

Background technique:

Existing ejection devices for electric injection molding machines transmit the rotational motion of the motor to the screw pair through a pulley drive or a gear transmission mechanism, and the screw pair converts the rotational motion into a linear motion and then drives the ejector plate forward or backward. Complete ejection and retraction actions. The disadvantages of this type of ejection device are:

(1) The transmission of power has undergone several conversions, resulting in large energy loss and low transmission efficiency.

(2) There must be a certain distance between the driving and driven wheels of the pulley drive or gear drive mechanism, the size of the mechanism is large and the space is tight.

(3) Many transmission links lead to many movable joints, and the motion precision and rigidity are all affected.

(4), complex structure, many parts and components, high manufacturing cost and difficult maintenance.

Utility model content

The purpose of the utility model is to provide a high transmission efficiency, good mechanism rigidity; high control accuracy, good sensitivity, suitable for precision injection molding; simplified structure, less parts, cost reduction; clean and tidy, no oil leakage pollution The direct drive injection molding machine ejector device.

In order to achieve the above-mentioned purpose, the utility model is realized in the following way, which is a direct-drive injection molding machine ejector device, including a thimble guide plate; The other end of the rod passes through the thimble guide plate and is clearance fit; it also includes more than two thimble rods with one end fixed on the thimble guide plate, and the other end of the thimble rod passes through the template and is clearance fit; it also includes the screw pair and the motor that drive the movement of the thimble guide plate ;The motor includes a motor housing, a motor back cover, a motor rotor, a motor winding and a sliding device set outside the motor rotor; the screw pair passes through the motor rotor and fits with its thread, and one end of the screw pair is fixed to the thimble guide plate connection; it also includes a bracket fixed on the formwork, and the motor casing is fixed on the bracket.

The sliding aid device includes a thrust bearing sleeved on one end of the motor rotor, a radial bearing and a tapered roller bearing sleeved on the other end of the motor rotor.

The screw pair is an ordinary screw pair or a ball screw pair.

Compared with the prior art, the utility model has the following advantages:

1. The power is directly transmitted to the ejector plate through the screw pair, with small energy loss and high transmission efficiency.

2. Fewer transmission links, fast power transmission response, high motion precision, and more sensitive control.

3. The structure is simplified, the space is saved, the number of parts is small, the manufacturing cost is reduced, and the maintenance is convenient.

Description of drawings

Fig. 1 is the structural representation of the utility model moving forward;

Fig. 2 is a structural schematic diagram of the utility model moving backward.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

As shown in Figures 1 and 2, it is a direct-drive injection molding machine ejector device, including an ejector pin guide plate 1, one end of which is fixed on the template 3, and the other end passes through the ejector pin guide plate 1 and two guide rods 2 with clearance fit, one end Two thimble rods 4 that are fixed on the other end of the thimble guide plate and pass through the formwork and are gap-fitted, the screw pair 9 that drives the movement of the thimble guide plate, the bracket 13 and the motor fixed on the formwork. The motor includes a motor housing 8, a motor back cover 5, a motor rotor 6, a motor winding 7 and a sliding aid device sleeved outside the motor rotor; the sliding aid device includes a thrust bearing 11 sleeved at one end of the motor rotor and a The radial bearing 12 and the tapered roller bearing 10 at the other end of the motor rotor; the motor housing is fixed on the bracket. The screw pair 9 passes through the motor rotor 6 and is threadedly matched with it. One end of the screw pair is fixedly connected with the thimble guide plate 1. The screw pair 9 is a common screw pair or a ball screw pair.

It combines the function of the motor rotor 6 and the screw nut in the screw pair 9 into one, and converts the rotary motion into a linear motion through the screw pair meshing with the motor rotor, and directly drives the thimble guide plate 1 to complete ejection and retraction. Control the positive and negative rotation of the motor to realize the conversion of ejection and retraction, control the speed of the motor to adjust the ejection and retraction speed, control the number of revolutions of the motor to realize the adjustment of the ejection and retraction distance, and control the torque of the motor to realize the ejection force adjustment. The position is maintained through the self-locking function of the screw pair or the braking function of the motor.

During production, the motor housing 8 is fixed on the template 3, the inner hole of the motor rotor 6 is processed into a screw nut to engage with the screw groove section of the lead screw pair 9, and the other end of the lead screw pair is fixedly connected to the thimble guide plate 1; One end of the rod 2 is fixed on the template 3, and the other end passes through the hole on the thimble plate and provides guidance for the sliding of the thimble plate; wear-resistant parts are installed between the thimble guide plate and the relative sliding surface of the guide rod, so that the thimble guide plate can move along the axis of the guide rod. Slide smoothly; one end of the thimble rod 4 is fixed on the thimble guide plate and can move together with it.

When working, when the motor rotor 6 rotates in the counterclockwise direction (as shown in Figure 1), the inner helical groove on the motor rotor and the outer helical edge of the lead screw pair mesh with each other, so that the lead screw pair moves linearly to the right end relative to the template, driving the thimble guide plate Slide to the right along the guide rod to complete the thimble ejection action.

When the motor rotates in the clockwise direction, the lead screw pair moves linearly to the left end relative to the template, and drives the thimble guide plate to slide to the left along the guide rod to complete the return action of the thimble.

To sum up, it can be seen that this is a brand new ejector device for electric direct-drive injection molding machines.

Claims (3)

1. An ejector device for a direct-drive injection molding machine, including a thimble guide plate; it is characterized in that it also includes more than two guide rods (2) with one end fixed on the template (3), and the other end of the guide rod passes through the thimble guide plate (1) and clearance fit; it also includes more than two thimble rods (4) with one end fixed on the thimble guide plate, and the other end of the thimble rod passes through the formwork and is clearance fit; it also includes a screw pair (9) that drives the movement of the thimble guide plate and the motor; the motor includes a motor housing (8), a motor back cover (5), a motor rotor (6), a motor winding (7) and a sliding device set outside the motor rotor; the screw pair (9) wears Pass the motor rotor (6) and thread it, and one end of the screw pair is fixedly connected with the thimble guide plate (1); it also includes a bracket (13) fixed on the template, and the motor housing is fixed on the bracket. 2. The ejector device of a direct drive injection molding machine according to claim 1, characterized in that: said slip aid device includes a thrust bearing (11) sleeved on one end of the motor rotor and a thrust bearing (11) sleeved on the other end of the motor rotor. Radial bearing (12) and tapered roller bearing (10). 3. The ejector device for a direct drive injection molding machine according to claim 1, characterized in that the screw pair (9) is a common screw pair or a ball screw pair.

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