Vertical electric injection molding machine

Abstract

The utility model discloses a vertical electric injection molding machine which comprises a base, an injection molding machine body consisting of a pushing and shooting mechanism and a material storage mechanism is arranged on the base, a screw rod driven by a first servo motor is arranged in the pushing and shooting mechanism, and a screw rod nut is arranged on the screw rod. A pressure sensor in signal connection with the first servo motor is installed on the end face of the lead screw nut, the pressure sensor is connected with the rear end of the material storage mechanism, injection time can be accurately controlled, a servo encoder detects and calculates the position, the position is fed back to a driver to be controlled, repeated precision operation within 0.01 mm can be maintained for a long time, and the injection efficiency is improved. A storage screw driven by a second servo motor is mounted in the storage mechanism, a storage cavity is formed in the front end of the storage mechanism, a nozzle is further mounted at the front end of the storage mechanism and communicated with the storage cavity, and compared with a hydraulic motor and a servo motor used by a conventional injection molding machine, the injection molding machine is higher in rotating speed, more suitable for molding of products with long runners and thin walls, more environmentally friendly and higher in practicability. And the method is environment-friendly and suitable for forming various medical products.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molding machine equipment, in particular to a vertical electric injection molding machine. Background Art

[0002] Traditional injection molding machines operate at constant pressure and flow rate during the entire working cycle, regardless of the stage. When high pressure and large flow rate are not required, the hydraulic oil will flow back to the oil tank through the relief valve and pressure valve without reactive power, resulting in energy waste. Moreover, the continuous circulation of the hydraulic oil will increase the oil temperature, reduce the viscosity of the pressure oil, and thus shorten the service life of the pressure oil. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a vertical electric injection molding machine.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A vertical electric injection molding machine comprises a base, on which an injection molding machine body is mounted, the injection molding machine body consisting of a pushing mechanism and a storage mechanism, a screw driven by a first servo motor is mounted in the pushing mechanism, a screw nut is mounted on the screw, a pressure sensor connected to the signal of the first servo motor is mounted on the end face of the screw nut, and the pressure sensor is connected to the rear end of the storage mechanism; a storage screw driven by a second servo motor is mounted in the storage mechanism, a storage cavity is provided at the front end of the storage mechanism, the storage screw pushes the material into the storage cavity, a nozzle is also mounted at the front end of the storage mechanism, and the nozzle is connected to the storage cavity.

[0006] A connecting ring is installed at the end of the lead screw nut, and the pressure sensor is fixed on the lead screw nut through the connecting ring.

[0007] The ejection mechanism also includes a screw seat, the screw rod is installed on the screw seat through a first bearing, the rear end of the screw rod extends out of the outside of the screw seat, a first driving wheel is installed on the output shaft of the first servo motor, a first driven wheel is installed at the rear end of the screw rod corresponding to the first driving wheel, and the first driving wheel and the first driven wheel are connected by a first transmission belt.

[0008] The material storage mechanism also includes a hollow barrel, the material storage screw is inserted into the barrel, and a feed port is provided on the side wall of the barrel at the rear end of the threaded structure of the material storage screw; the nozzle is installed at the front end of the barrel, and the inner cavity of the nozzle and the front end of the barrel together form the material storage cavity.

[0009] The material storage mechanism also includes a bearing seat, in which a transmission shaft is installed via a second bearing, and the transmission shaft is fixedly connected to the material storage screw.

[0010] The output shaft of the second servo motor is equipped with a second driving wheel, and the transmission shaft is equipped with a second driven wheel corresponding to the second driving wheel. The second driving wheel is connected to the second driven wheel through a second transmission belt.

[0011] The diameter of the second driven wheel is greater than the diameter of the second driving wheel.

[0012] The beneficial effects of the utility model are:

[0013] 1. The utility model has a screw driven by a first servo motor installed in the push-injection mechanism, a screw nut installed on the screw, a pressure sensor connected to the signal of the first servo motor installed on the end face of the screw nut, and the pressure sensor is connected to the rear end of the storage mechanism, which can accurately control the injection time of the material. The servo encoder detects and calculates the position of the nozzle, and feeds back to the driver for control, thereby improving the repetition accuracy during injection, and can maintain the repetition accuracy within 0.01mm for a long time. The overall transmission accuracy is high, the noise is low, and the structure is relatively simple and easy to install.

[0014] 2. Compared with the hydraulic motor used in conventional injection molding machines, the servo motor has a higher speed and is more suitable for the molding of long flow channels and thin-walled products. It is also more environmentally friendly and pollution-free, making it suitable for the molding of various medical products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a cross-sectional view of the utility model;

[0017] Figure 2 It is a structural diagram of the ejection mechanism;

[0018] Figure 3 is a cross-sectional view of the ejection mechanism;

[0019] Figure 4 is a cross-sectional view of the storage mechanism;

[0020] Figure 5 It is a cross-sectional view of the storage mechanism. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention.

[0023] Some embodiments of the present invention are described below in conjunction with the accompanying drawings.

[0024] Reference Figure 1-5 A vertical electric injection molding machine comprises a base 1, on which an injection molding machine body is mounted, and the injection molding machine body is composed of a push mechanism 22 and a storage mechanism 23, wherein a screw 3 driven by a first servo motor 2 is mounted in the push mechanism 22, and a screw nut 4 is mounted on the screw 3, and a pressure sensor 5 connected to the signal of the first servo motor 2 is mounted on the end surface of the screw nut 4, and the pressure sensor 5 is connected to the rear end of the storage mechanism 23; a storage screw 7 driven by a second servo motor 6 is mounted in the storage mechanism 23, and a storage cavity is arranged at the front end of the storage mechanism 23, and the storage screw 7 is controlled by the second servo motor to push the material into the storage cavity, and a nozzle 8 is also mounted at the front end of the storage mechanism 23, and the nozzle 8 is connected to the storage cavity. Compared with the hydraulic motor used in the conventional injection molding machine, the servo motor has a higher speed and is more suitable for the molding of products with long flow channels and thin walls. At the same time, it is more environmentally friendly and pollution-free, and is suitable for the molding of various medical products.

[0025] This product also includes a driver connected to the first servo motor 2 and the second servo motor 6 signals. The driver signal is connected to a servo encoder connected to the pressure sensor 5 signal, which can accurately control the injection time of the material. The servo encoder detects and calculates the position of the nozzle and feeds it back to the driver for control, thereby improving the repetition accuracy during injection. The repetition accuracy can be maintained within 0.01mm for a long time. The overall transmission accuracy is high, the noise is low, and the structure is relatively simple and easy to install.

[0026] When the product is started, the second servo motor 6 is started first to control the storage screw 7 to rotate and push the material into the storage chamber. When the volume of the material in the storage chamber reaches the volume of the product, the second servo motor stops, and the first servo motor pushes the storage mechanism 23 as a whole through the lead screw and the lead screw nut, so that the material in the storage chamber is injected into the mold cavity through the nozzle. At this time, the nozzle 8 will be opened in conjunction. When the second servo motor 6 is started, the nozzle 8 is closed, which belongs to the prior art. When the material cools, due to the physical characteristics of thermal expansion and contraction, it will shrink, and the pressure detected by the pressure sensor 5 will decrease, thereby controlling the first servo motor 2 to continue to rotate, so that the pressure detected by the pressure sensor 5 remains stable and the pressure is accurately maintained.

[0027] The first servo motor 2 and the second servo motor 6 have a wide adjustable speed range, and different speeds can be set according to different materials. For example, for materials with stronger fluidity, the speed of the second servo motor 6 can be increased accordingly to speed up the pushing of materials, thereby reducing production time and increasing production efficiency.

[0028] A connecting ring 14 is installed at the end of the screw nut 4 , and the pressure sensor 5 is fixed on the screw nut 4 through the connecting ring 14 .

[0029] The ejection mechanism 22 also includes a screw seat 9, the screw rod 3 is installed on the screw seat 9 through a first bearing 10, the rear end of the screw rod 3 extends out of the outside of the screw seat 9, a first driving wheel 11 is installed on the output shaft of the first servo motor 2, a first driven wheel 12 is installed at the rear end of the screw rod 3 corresponding to the first driving wheel 11, and the first driving wheel 11 and the first driven wheel 12 are connected through a first transmission belt 13.

[0030] The storage mechanism 23 also includes a hollow barrel 15, the storage screw 7 is inserted into the barrel 15, and the side wall of the barrel 15 is provided with a feed port 16 at the rear end of the threaded structure of the storage screw 7. After the external material passes through the heating device and becomes liquid, it enters the barrel 15 through the feed port 16 and is then pushed into the storage cavity through the storage screw 7; the nozzle 8 is installed at the front end of the barrel 15, and the inner cavity of the nozzle 8 and the front end of the barrel 15 together form the storage cavity.

[0031] The material storage mechanism 23 further includes a bearing seat 24 , in which a transmission shaft 18 is installed via a second bearing 17 , and the transmission shaft 18 is fixedly connected to the material storage screw 7 .

[0032] A second driving wheel 19 is installed on the output shaft of the second servo motor 6 , a second driven wheel 20 is installed on the transmission shaft 18 corresponding to the second driving wheel 19 , and the second driving wheel 19 and the second driven wheel 20 are connected via a second transmission belt 21 .

[0033] The diameter of the second driven wheel 20 is greater than the diameter of the second driving wheel 19 , so as to achieve the effect of reducing speed and increasing torque, thereby ensuring the force of the storage screw 7 in pushing the material.

[0034] This product can also be connected to an automatic lubrication system, which can effectively ensure the service life of the parts that need lubrication by regularly injecting lubricating oil into the parts that need lubrication, such as various bearings, through the driving equipment.

[0035] In the present invention, the term "plurality" means two or more, unless otherwise clearly defined. The term "and / or" used herein includes any and all combinations of one or more related listed items. The terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "connect" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0036] It should be noted that when an element is referred to as being "assembled on", "installed on", "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0037] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0038] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A vertical electric injection molding machine, comprising a base (1), on which an injection molding machine body is mounted, characterized in that The injection molding machine body is composed of a push mechanism (22) and a material storage mechanism (23). A screw (3) driven by a first servo motor (2) is installed in the push mechanism (22). A screw nut (4) is installed on the screw (3). A pressure sensor (5) connected to the signal of the first servo motor (2) is installed on the end surface of the screw nut (4). The pressure sensor (5) is connected to the rear end of the material storage mechanism (23). A material storage screw (7) driven by a second servo motor (6) is installed in the material storage mechanism (23). A material storage cavity is arranged at the front end of the material storage mechanism (23). The material storage screw (7) pushes the material into the material storage cavity. A nozzle (8) is also installed at the front end of the material storage mechanism (23). The nozzle (8) is connected to the material storage cavity.

2. The vertical electric injection molding machine according to claim 1, characterized in that A connecting ring (14) is mounted on the end of the lead screw nut (4), and the pressure sensor (5) is fixed to the lead screw nut (4) via the connecting ring (14).

3. The vertical electric injection molding machine according to claim 1, characterized in that The ejection mechanism (22) further comprises a screw seat (9), the screw rod (3) being mounted on the screw seat (9) via a first bearing (10), the rear end of the screw rod (3) extending out of the outside of the screw seat (9), a first driving wheel (11) being mounted on the output shaft of the first servo motor (2), a first driven wheel (12) being mounted at the rear end of the screw rod (3) corresponding to the first driving wheel (11), and the first driving wheel (11) and the first driven wheel (12) being connected in transmission via a first transmission belt (13).

4. The vertical electric injection molding machine according to claim 1, characterized in that The material storage mechanism (23) further comprises a hollow barrel (15), the material storage screw (7) being inserted into the barrel (15), and a feed port (16) being arranged on the side wall of the barrel (15) at the rear end of the threaded structure of the material storage screw (7); the nozzle (8) being mounted at the front end of the barrel (15), and the inner cavity of the nozzle (8) and the front end of the barrel (15) forming the material storage cavity.

5. The vertical electric injection molding machine according to claim 4, characterized in that The material storage mechanism (23) further comprises a bearing seat (24), a transmission shaft (18) being mounted in the bearing seat (24) via a second bearing (17), and the transmission shaft (18) being fixedly connected to the material storage screw (7).

6. The vertical electric injection molding machine according to claim 5, characterized in that The output shaft of the second servo motor (6) is mounted with a second driving wheel (19), the transmission shaft (18) is mounted with a second driven wheel (20) corresponding to the second driving wheel (19), and the second driving wheel (19) and the second driven wheel (20) are connected via a second transmission belt (21).

7. The vertical electric injection molding machine according to claim 6, characterized in that The diameter of the second driven wheel (20) is greater than the diameter of the second driving wheel (19).

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