A material feeding structure and feeding method for preventing material shortage

Abstract

The present invention provides a silo feeding structure that prevents material interruption, including a silo and an injection molding machine body, the silo is fixedly mounted on the injection molding machine body, a feeding pipe and an exhaust pipe are provided on the silo, the feeding pipe is passed through the side wall of the silo, the exhaust pipe is passed through the upper cover of the silo, an electromagnetic valve is provided at the discharge port at the bottom of the silo, a first sensor is provided on the inner wall of the silo above the electromagnetic valve, and a second sensor is provided in the feed channel of the injection molding machine body. The present invention also provides a feeding method for a silo feeding structure that prevents material interruption. Compared with the prior art, the present invention effectively solves the problem of frequent material interruptions in the production process of the injection molding machine, stabilizes production, and ensures injection molding quality.

Description

Technical Field

[0001] The invention relates to a silo feeding structure of an injection molding machine, and in particular to a silo feeding structure and a feeding method for preventing material interruption. Background Art

[0002] Injection molding machine, also known as injection molding machine or injection machine, is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. Injection molding machines can be divided into vertical, horizontal and vertical-horizontal composite types according to the arrangement of the injection device and the clamping device.

[0003] As the silo that provides raw materials to the injection device, its feeding capacity directly affects the production efficiency and quality of the injection molding machine. At present, the silo capacity of the injection molding machine is small. When producing large products, the silo supply is insufficient, and the material is easily cut off during the production process, resulting in the quality of the products produced cannot be guaranteed. Special personnel are required to add materials, which increases labor costs. Summary of the invention

[0004] In view of this, the present invention provides a silo feeding structure and feeding method for preventing material shortage, which effectively solves the problem of frequent material shortage during the production process of the injection molding machine.

[0005] To this end, the present invention provides a silo feeding structure for preventing material interruption, including a silo and an injection molding machine body, the silo is fixedly mounted on the injection molding machine body, a feeding pipe and an exhaust pipe are provided on the silo, the feeding pipe is passed through the side wall of the silo, the exhaust pipe is passed through the upper cover of the silo, an electromagnetic valve is provided at the discharge port at the bottom of the silo, a first sensor is provided on the inner wall of the silo above the electromagnetic valve, and a second sensor is provided in the feed channel of the injection molding machine body.

[0006] Furthermore, the upper cover is detachably mounted on the silo.

[0007] Furthermore, a plurality of connecting plates are arranged circumferentially on the upper cover, and a locking mechanism corresponding to the connecting plates is arranged on the silo, and the upper cover is fixedly mounted on the silo through the cooperation between the connecting plates and the locking mechanism.

[0008] Furthermore, the number of connecting plates is 4.

[0009] Furthermore, the connecting plates are arranged equidistantly along the circumference of the upper cover.

[0010] Furthermore, the feeding pipe and the exhaust pipe are corrugated pipes.

[0011] Furthermore, the feeding pipe and the exhaust pipe are made of transparent material.

[0012] Furthermore, the first sensor and the second sensor are photoelectric sensors.

[0013] Furthermore, an extension tube is provided between the silo and the injection molding machine body, one end of the extension tube is fixedly mounted on the bottom of the silo, and the other end of the extension tube is fixedly mounted on the injection molding machine body.

[0014] On the other hand, the present invention provides a feeding method of a silo feeding structure for preventing material interruption, comprising the following steps:

[0015] 1) In the initial state, the solenoid valve in the silo is closed, the exhaust pipe is vacuumed, and the feeding pipe sucks the material;

[0016] 2) When the hopper suction time reaches the set value, the control mechanism opens the solenoid valve and the material flows to the injection molding machine body;

[0017] 3) When the material drops to the first sensor in the silo, the control mechanism receives the signal and controls the solenoid valve to close, the silo sucks the material, and the material under the solenoid valve continues to flow to the injection molding machine body;

[0018] 4) When the material drops to the second sensor in the injection molding machine body, the control mechanism receives the signal, controls the silo to stop sucking the material, the solenoid valve opens, and the material in the silo flows to the injection molding machine body;

[0019] 5) Repeat the above steps 3)-4) to continuously feed the injection molding machine body.

[0020] In a material silo feeding structure and feeding method for preventing material interruption provided by the present invention, PLC is used to automatically control the feeding of the silo. In the initial state, the solenoid valve in the silo is closed, the exhaust pipe is vacuumed, and the feeding pipe sucks the material; when the silo sucking time reaches the set value, the injection molding machine body is fed; when the material drops to the first sensor in the silo, the solenoid valve is closed and the material is sucked again. At this time, the material under the solenoid valve continues to flow to the injection molding machine body and the material will not be interrupted; when the material drops to the second sensor in the injection molding machine body, the material is about to be used up, and the solenoid valve is opened in time to feed the material to avoid the occurrence of material interruption. The injection molding machine production process will not be interrupted, the product quality is guaranteed, and there is no need to use additional manual material addition, which saves costs. The feeding pipe and the exhaust pipe are corrugated pipes to facilitate the arrangement of pipelines, and the transparent feeding pipe and exhaust pipe are used to facilitate the monitoring of the suction of the silo. The first sensor and the second sensor use photoelectric sensors to ensure the accuracy of material consumption status monitoring.

[0021] Compared with the prior art, the present invention effectively solves the problem of frequent material breaks during the production process of the injection molding machine, ensures stable production and guarantees the quality of injection molding. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0023] Figure 1 A schematic structural diagram of a silo feeding structure for preventing material interruption provided by an embodiment of the present invention;

[0024] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0025] Figure 3 A schematic diagram of the internal structure of a silo feeding structure that prevents material interruption provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0026] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0027] Embodiment 1:

[0028] See also Figures 1 to 3 The figure shows a material feeding structure for preventing material interruption provided by the first embodiment of the present invention, including a material silo 1 and an injection molding machine body 2. The material silo 1 is fixedly mounted on the injection molding machine body 2. A feeding pipe 11 and an exhaust pipe 12 are provided on the material silo 1. The feeding pipe 11 is passed through the side wall of the material silo 1, and the exhaust pipe 12 is passed through the upper cover 13 of the material silo 1. A solenoid valve 3 is provided at the discharge port at the bottom of the material silo 1, a first sensor 4 is provided on the inner wall of the material silo 1 above the solenoid valve 3, and a second sensor 5 is provided in the feed channel 21 of the injection molding machine body 2.

[0029] For details, see Figures 1 to 3 The feeding pipe 11 and the exhaust pipe 12 are corrugated pipes.

[0030] For details, see Figures 1 to 3 The feeding pipe 11 and the exhaust pipe 12 are made of transparent materials.

[0031] For details, see Figures 1 to 3 , the first sensor 4 and the second sensor 5 are photoelectric sensors.

[0032] On the other hand, the present invention provides a feeding method of a silo feeding structure for preventing material interruption, comprising the following steps:

[0033] 1) In the initial state, the solenoid valve 3 in the silo 1 is closed, the exhaust pipe 12 is evacuated, and the feeding pipe 11 sucks the material;

[0034] 2) When the material absorbing time of the silo 1 reaches the set value, the control mechanism opens the solenoid valve 3, and the material flows to the injection molding machine body 2;

[0035] 3) When the material drops to the first sensor 4 in the silo 1, the control mechanism receives the signal and controls the solenoid valve 3 to close, the silo 1 sucks the material, and the material under the solenoid valve 3 continues to flow to the injection molding machine body 2;

[0036] 4) When the material drops to the second sensor 5 in the injection molding machine body 2, the control mechanism receives the signal, controls the silo 1 to stop sucking the material, and the solenoid valve 3 opens, and the material in the silo 1 flows to the injection molding machine body 2;

[0037] 5) Repeat the above steps 3)-4) to continuously feed the injection molding machine body 2.

[0038] In a material silo feeding structure and feeding method for preventing material interruption provided by the present invention, PLC is used to automatically control the feeding of the silo. In the initial state, the solenoid valve in the silo is closed, the exhaust pipe is vacuumed, and the feeding pipe sucks the material; when the silo sucking time reaches the set value, the injection molding machine body is fed; when the material drops to the first sensor in the silo, the solenoid valve is closed and the material is sucked again. At this time, the material under the solenoid valve continues to flow to the injection molding machine body and the material will not be interrupted; when the material drops to the second sensor in the injection molding machine body, the material is about to be used up, and the solenoid valve is opened in time to feed the material to avoid the occurrence of material interruption. The injection molding machine production process will not be interrupted, the product quality is guaranteed, and there is no need to use additional manual material addition, which saves costs. The feeding pipe and the exhaust pipe are corrugated pipes to facilitate the arrangement of pipelines, and the transparent feeding pipe and exhaust pipe are used to facilitate the monitoring of the suction of the silo. The first sensor and the second sensor use photoelectric sensors to ensure the accuracy of material consumption status monitoring.

[0039] Compared with the prior art, the present invention effectively solves the problem of frequent material breaks during the production process of the injection molding machine, ensures stable production and guarantees the quality of injection molding.

[0040] Embodiment 2:

[0041] See also Figures 1 to 3, the figure shows a silo feeding structure for preventing material interruption provided by embodiment 2 of the present invention. Based on the above embodiment, this embodiment further makes the following improved technical solutions: the upper cover 13 is detachably mounted on the silo 1; the upper cover 13 is circumferentially provided with a plurality of connecting plates 131, and the silo 1 is provided with a locking mechanism 14 corresponding to the connecting plates 131, and the upper cover 13 is fixedly mounted on the silo 1 through the cooperation between the connecting plates 131 and the locking mechanism 14; the number of connecting plates 131 is 4; the connecting plates 131 are equidistantly arranged along the circumference of the upper cover 13.

[0042] The upper cover is detachably mounted on the silo through the connecting plate and the locking mechanism, which is convenient for inspection and repair of the internal structure of the silo. The four connecting plates arranged equidistantly on the upper cover ensure the airtightness of the detachable structure and the vacuum degree when the silo sucks materials.

[0043] Embodiment three:

[0044] See also Figures 1 to 3 The figure shows a silo feeding structure for preventing material interruption provided by embodiment 3 of the present invention. This embodiment further makes the following improved technical scheme on the basis of the above embodiment: an extension tube 6 is arranged between the silo 1 and the injection molding machine body 2, and one end of the extension tube 6 is fixedly installed at the bottom of the silo 1, and the other end is fixedly installed on the injection molding machine body 2.

[0045] The material flowing out of the silo enters the injection molding machine body through the extension tube. The extension tube can increase the distance between the solenoid valve and the second sensor, increase the amount of material flowing to the injection molding machine body after the solenoid valve is closed, extend the time when the silo cycles to absorb material, increase the amount of material absorbed, and avoid frequent starting of the absorption process.

[0046] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A feeding method for a silo feeding structure that prevents material interruption, characterized in that , based on a silo feeding structure, the silo feeding structure comprises a silo (1) and an injection molding machine body (2), the silo (1) is fixedly mounted on the injection molding machine body (2), the silo (1) is provided with a feeding pipe (11) and an exhaust pipe (12), the feeding pipe (11) is passed through the side wall of the silo (1), the exhaust pipe (12) is passed through the upper cover (13) of the silo (1), an electromagnetic valve (3) is provided at the bottom discharge port of the silo (1), a first sensor (4) is provided on the inner wall of the silo (1) above the electromagnetic valve (3), and a second sensor (5) is provided in the feed channel (21) of the injection molding machine body (2); An extension tube (6) is provided between the silo (1) and the injection molding machine body (2), one end of the extension tube (6) being fixedly mounted on the bottom of the silo (1) and the other end being fixedly mounted on the injection molding machine body (2); The feeding method comprises the following steps: 1) In the initial state, the electromagnetic valve (3) in the silo (1) is closed, the exhaust pipe (12) is evacuated, and the feeding pipe (11) sucks the material; 2) When the material absorbing time of the silo (1) reaches a set value, the control mechanism opens the solenoid valve (3) and the material flows to the injection molding machine body (2); 3) When the material in the silo (1) drops to the first sensor (4), the control mechanism receives a signal and controls the electromagnetic valve (3) to close, the silo (1) sucks the material, and the material below the electromagnetic valve (3) continues to flow toward the injection molding machine body (2); 4) When the material drops to the second sensor (5) in the injection molding machine body (2), the control mechanism receives a signal and controls the silo (1) to stop sucking the material, the solenoid valve (3) opens, and the material in the silo (1) flows to the injection molding machine body (2); 5) Repeat the above steps 3)-4) to continuously supply materials to the injection molding machine body (2).

2. The feeding method of the silo feeding structure for preventing material interruption according to claim 1 is characterized in that: The upper cover (13) is detachably mounted on the silo (1).

3. The feeding method of the silo feeding structure for preventing material interruption according to claim 2 is characterized in that: The upper cover (13) is provided with a plurality of connecting plates (131) in the circumferential direction, the material bin (1) is provided with a locking mechanism (14) corresponding to the connecting plates (131), and the upper cover (13) is fixedly mounted on the material bin (1) through the cooperation between the connecting plates (131) and the locking mechanism (14).

4. The feeding method of the silo feeding structure for preventing material interruption according to claim 3 is characterized in that: The number of the connecting plates (131) is 4.

5. The feeding method of the silo feeding structure for preventing material interruption according to claim 4 is characterized in that: The four connecting plates (131) are arranged equidistantly along the circumference of the upper cover (13).

6. The feeding method of the silo feeding structure for preventing material interruption according to claim 1, characterized in that: The feeding pipe (11) and the exhaust pipe (12) are corrugated pipes.

7. A feeding method for a silo feeding structure to prevent material interruption according to claim 1 or 6, characterized in that: The feeding pipe (11) and the exhaust pipe (12) are made of transparent material.

8. The feeding method of the silo feeding structure for preventing material interruption according to claim 1, characterized in that: The first sensor (4) and the second sensor (5) are photoelectric sensors.

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