Injection molding machine for producing low-voltage electrical component housing

Abstract

The utility model relates to injection moulding technical field discloses a kind of injection moulding machines for low-voltage electrical component shell production, including injection moulding machine body, the injection moulding machine body is provided with barrel, the barrel top end is sealed arrangement, barrel side is provided with feeding opening, and the feeding opening is connected with material guiding portion in conduction;The bottom of barrel is provided with discharge port, and the bottom of discharge port extends downward to form discharge channel;The size of discharge channel is greater than the size of discharge port;Sealing plate is provided at the discharge port, and the sealing plate is connected with linear drive unit arranged at the top of barrel by connecting rod;The utility model is not influenced by material weight change, and the structure is stable, reliable, can effectively solve the problem of plastic particle irritant smell leakage, guarantee the health of operator, improve the safety of production environment.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and in particular to an injection molding machine for producing housings of low-voltage electrical components. Background Technology

[0002] With the rapid development of the low-voltage electrical appliance industry, the manufacturing process of low-voltage electrical component housings, as core protective components of electrical equipment, has attracted much attention. Currently, most low-voltage electrical component housings use nylon PA6 as raw material and are mass-produced through injection molding. The injection molding machine, as a key piece of equipment in this production process, works by feeding plastic particles into the feeding structure, melting them inside the machine, injecting them into a closed mold cavity, and then cooling and solidifying them to form the desired housing shape.

[0003] In existing technologies, most injection molding machines have only one open hopper for feeding, where plastic particles are directly fed into the hopper and then into the machine. However, during the injection molding process, plastic particles such as nylon PA6 may produce odors due to the addition of additives or moisture absorption by the raw materials. These odors continuously diffuse from the open hopper, permeating the production environment, and long-term exposure can adversely affect the health of operators.

[0004] To alleviate the aforementioned odor emission problem, utility model patent CN208584731U discloses a feeding mechanism for an injection molding machine. Its core design involves a packing cylinder with a storage chamber detachably connected to the receiving hopper. Plastic particles are pushed into the receiving hopper by a pusher plate within the storage chamber. A split-type baffle, driven by a torsion spring and a magnet, is installed at the outlet of the packing cylinder to achieve a seal. While this solution reduces odor leakage to some extent, it still has significant drawbacks in practical application: Firstly, the sealing and resetting of the baffle relies solely on the elastic force of the torsion spring and the attraction force of the magnet. When the weight of the material in the storage chamber changes, the sealing strength is prone to fluctuation, making it difficult to guarantee a stable sealing effect, and some irritating odor will still leak from the sealing gap. Secondly, when material remains in the barrel, the split-type baffle structure can easily become stuck between the two baffles, causing the baffles to jam and further damaging the sealing performance. Therefore, it cannot fundamentally solve the problem of odor emission affecting the health of workers.

[0005] Therefore, there is an urgent need for an injection molding machine for producing low-voltage electrical component housings that is structurally stable, reliably sealed, and unaffected by changes in material weight, in order to solve the problem of irritating odor leakage from plastic particles, protect the health of operators, and improve the safety of the production environment. Utility Model Content

[0006] The purpose of this invention is to provide an injection molding machine for producing housings of low-voltage electrical components. It is unaffected by changes in material weight, has a stable structure, and is reliably sealed. It can effectively solve the problem of leakage of irritating odors from plastic particles, protect the health of operators, and improve the safety of the production environment.

[0007] The present invention adopts the following technical solution:

[0008] An injection molding machine for producing housings of low-voltage electrical components includes a machine body, a barrel on the machine body, a sealed top of the barrel, a feeding port on one side of the barrel, and a guide connected to the feeding port; a discharge port at the bottom of the barrel, with a discharge channel extending downward from the bottom of the discharge port; the size of the discharge channel is larger than the size of the discharge port; a sealing plate at the discharge port is connected to a linear drive unit located at the top of the barrel via a connecting rod.

[0009] Preferably, a flow guide platform is coaxially arranged on the top of the sealing plate, the flow guide platform has a frustum-shaped structure, and the connecting rod is arranged on the top of the flow guide platform.

[0010] Preferably, the bottom area of ​​the flow guide platform is the same as the top surface area of ​​the sealing plate.

[0011] Preferably, the top area of ​​the guide platform is the same as the area of ​​the end of the connecting rod that it contacts.

[0012] Preferably, a sealing plate is slidably provided at the feeding port, and the sealing plate is connected to the connecting rod.

[0013] Preferably, the sealing plate is located at the top of the inner side of the material cylinder and is inclined downward with a guide plate. The guide plate is fixedly connected to the connecting rod, and the sealing plate establishes a connection with the connecting rod through the guide plate.

[0014] Preferably, the width of the guide plate is smaller than the width of the feeding plate.

[0015] Preferably, the top of the material cylinder is detachably provided with a top plate, the top plate is provided with an air pressure balance hole, and the linear drive unit is disposed on the top plate.

[0016] Preferably, the material guiding section includes a guide pipe communicating with the feeding port, the guide pipe being arranged at an inclination relative to the feeding port, a vertically arranged storage pipe being connected to the guide pipe, and a feeding hopper being provided at the top of the storage pipe.

[0017] Preferably, the bottom wall of the guide tube is provided with a motor-driven feeding rod.

[0018] Compared with the prior art, the advantages of this utility model are as follows: This utility model directly connects the sealing plate to the linear drive unit at the top of the material cylinder via a connecting rod, and uses an active drive method to control the opening and closing of the sealing plate. The driving force is stable and controllable, completely eliminating the limitations of the elastic force of the torsion spring and the attraction force of the magnet in the prior art. Even if the weight of the material in the storage chamber changes, the sealing between the sealing plate and the discharge port can still be guaranteed, avoiding odor leakage caused by fluctuations in sealing force, and also avoiding the problem of sealing plate resetting and jamming, ensuring continuous sealing. At the same time, the sealing control structure of this application does not rely on easily worn or easily interfered components such as torsion springs and magnets. The opening and closing of the sealing plate can be accurately controlled by the linear drive unit alone. The structure is simple, has a low failure rate, and is easy to install and maintain. Attached Figure Description

[0019] Figure 1 This is a front view of an embodiment of this application;

[0020] Figure 2 This is a cross-sectional view of the material cylinder according to an embodiment of this application;

[0021] Figure 3 This is a schematic diagram of the structure of the guide plate in an embodiment of this application. Detailed Implementation

[0022] The present invention will now be described clearly and completely with reference to the accompanying drawings and embodiments:

[0023] like Figures 1 to 3As shown, the injection molding machine for producing low-voltage electrical component housings according to this utility model includes an injection molding machine body 1. A material cylinder 2 is provided on the feeding mechanism of the injection molding machine body 1. The top of the material cylinder 2 is sealed, and a feeding port 3 is provided on one side of the material cylinder 2. A guide part is conductively connected to the feeding port 3 for adding raw materials into the material cylinder 2 through the guide part. A discharge port is provided at the bottom of the material cylinder 2, and a discharge channel 4 is formed by extending downward from the bottom of the discharge port. The size of the discharge channel 4 is larger than the size of the discharge port. This design can guide the material and prevent the material from accumulating and blocking at the discharge port, ensuring the smoothness of the feeding process and improving production efficiency. On the other hand, the expansion design of the discharge channel 4 will not affect the sealing effect of the sealing plate 5 at the discharge port, achieving a balance between sealing reliability and feeding efficiency. A sealing plate 5 is provided at the discharge port, and the sealing plate 5 is connected to a linear drive unit 23 provided at the top of the material cylinder 2 through a connecting rod 7. The linear drive unit 23 pushes the sealing plate 5 into the discharge channel 4, opening the discharge port at the bottom of the material cylinder 2 and facilitating the smooth discharge of raw materials. Compared to torsion springs and magnetic adsorption, the linear drive unit 23 provides a stable and controllable driving force. Even if the weight of the material in the storage chamber changes, it ensures a tight seal between the sealing plate 5 and the discharge port, preventing odor leakage due to fluctuations in sealing force and avoiding the problem of the sealing plate 5 getting stuck during reset, thus ensuring continuous sealing. The linear drive unit 23 is a linearly movable mechanism, preferably using a cylinder, with readily available parts and convenient installation and use.

[0024] Furthermore, a guide platform 6 is coaxially arranged on the top of the sealing plate 5. The guide platform 6 has a frustum-shaped structure, and the connecting rod 7 is located on the top of the guide platform 6. The guide platform 6 is designed to assist in material discharge during the discharge process by utilizing its inclined surface, thus preventing material accumulation on the top of the sealing plate 5. Preferably, the bottom area of ​​the guide platform 6 is the same as the top surface area of ​​the sealing plate 5, and the top area of ​​the guide platform 6 is the same as the end area of ​​the connecting rod 7 it contacts, so as to prevent material from accumulating between the guide platform 6 and the sealing plate 5, and between the guide platform 6 and the connecting rod 7, thereby achieving smooth material flow and discharge. In this embodiment, the discharge port at the bottom of the material cylinder 2 is designed as a constricted inverted cone structure to facilitate material collection and discharge, and the side wall of the sealing plate 5 matches the inner wall of the discharge port.

[0025] Furthermore, a sealing plate 8 is slidably installed at the feeding port 3, and the sealing plate 8 is connected to the connecting rod 7. When the sealing plate 5 seals the discharge port, the sealing plate 8 seals the feeding port 3; as the sealing plate 5 moves down and the discharge port opens, the sealing plate 8 moves down synchronously, the feeding port 3 opens, and the material in the guiding section will then be replenished into the material cylinder 2 to assist in the descent. Preferably, a limiting slide rail 9 is protruding on the inner wall of the material cylinder 2 below the feeding port 3, and a limiting slide groove 10 is provided on the sealing plate 8. The sliding connection between the limiting slide groove 10 and the limiting slide rail 9 can ensure the stability of the up-and-down movement of the sealing plate 8.

[0026] Furthermore, a guide plate 11 is inclined downwards at the top of the sealing plate 8 on one side inside the material cylinder 2. The guide plate 11 is fixedly connected to the connecting rod 7. Specifically, the guide plate 11 has an installation hole 12 for the connecting rod 7 to pass through, and a connecting hole 13 through the installation hole 12 on the side wall of the guide plate 11. The connecting bolt passes through the connecting hole 13 into the installation hole 12 and connects with the screw hole 14 on the connecting rod 7. The sealing plate 8 establishes a connection with the connecting rod 7 through the guide plate 11. A reinforcing plate 15 is provided between the guide plate 11 and the sealing plate 8 to ensure its structural strength. The guide plate 11 can guide the material to move away from the feeding port 3 when the material is fed into the material cylinder 2 by the guiding part, avoiding the material from accumulating near the feeding port 3. This not only helps with uniform feeding but also facilitates the opening and closing of the sealing plate 8. Preferably, the width of the guide plate 11 is smaller than the width of the feeding port 3, that is, smaller than the width of the sealing plate 8. With this setting, some material can be guided to the side of the material cylinder 2 away from the feeding port 3, while some material falls into the material cylinder 2 on the side closer to the feeding port 3 along both sides of the guide plate 11, so as to achieve uniform feeding.

[0027] Furthermore, a top plate 16 is detachably mounted on the top of the material cylinder 2 via bolts. The top plate 16 has an air pressure balance hole 17 to balance the internal and external pressures of the material cylinder 2, enabling the smooth opening and closing of the sealing plate 5. A linear drive unit 23 is mounted on the top plate 16. Specifically, an annular mounting groove is provided on the top of the material cylinder 2, and the top plate 16 is fixed to the mounting groove with bolts.

[0028] Furthermore, the material guiding section includes a guide pipe 18 that communicates with the feeding port 3. The guide pipe 18 is arranged at an angle upward relative to the feeding port 3 to facilitate the flow of materials. A vertically arranged storage pipe 19 is connected to the guide pipe 18. The storage pipe 19 is connected to the material cylinder 2 through a connecting plate to provide some support for the storage pipe and to temporarily store materials. A feeding hopper 20 is provided at the top of the storage pipe 19. A sealing cover can be provided at the top of the feeding hopper 20 for sealing. The sealing cover can be slidably set at the top of the feeding hopper 20, or the sliding of the sealing cover at the top of the feeding hopper 20 can be controlled by a horizontally set cylinder to realize the automatic opening and closing of the top of the feeding hopper 20. Preferably, a material feeding rod 22 driven by a motor 21 is provided on the bottom wall of the guide pipe 18. The motor 21 is located on the outer side of the bottom of the guide pipe 18. The material feeding rod 22 can be activated when feeding material to assist the material in pushing into the material cylinder 2, avoiding the accumulation and blockage of material in the guide pipe 18, and ensuring smooth feeding.

[0029] In this invention, materials can be added via the feeding hopper 20 without disassembling the material cylinder 2. When discharge is required, the linear drive unit 23 is controlled to move downwards, pushing the sealing plate 5 downwards and opening the discharge port to achieve the discharge operation. Simultaneously, the sealing plate 8 moves downwards, and the feeding port 3 opens synchronously, completing the replenishment operation into the material cylinder 2. After feeding is completed, the linear drive unit 23 is controlled to reset. The linear drive unit 23 uses a cylinder, providing stable and controllable driving force, avoiding the limitations of torsion spring elasticity and magnetic attraction in existing technologies. Even if the weight of the material in the storage chamber changes, the sealing plate 5 and the discharge port can still be kept in a tight seal, preventing odor leakage due to fluctuations in sealing force and avoiding the problem of the sealing plate 5 getting stuck during reset, thus ensuring continuous sealing.

Claims

1. An injection molding machine for producing housings of low-voltage electrical components, comprising an injection molding machine body, wherein a material cylinder is provided on the injection molding machine body, characterized in that: The top of the material cylinder is sealed, and a feeding port is provided on one side of the material cylinder, with a guiding part connected to the feeding port. A discharge port is provided at the bottom of the material cylinder, and a discharge channel extends downward from the bottom of the discharge port. The size of the discharge channel is larger than the size of the discharge port. A sealing plate is provided at the discharge port, and the sealing plate is connected to a linear drive unit located at the top of the material cylinder via a connecting rod.

2. The injection molding machine for producing low-voltage electrical component housings according to claim 1, characterized in that: The sealing plate is coaxially provided with a flow guide platform on its top. The flow guide platform has a frustum-shaped structure, and the connecting rod is provided on the top of the flow guide platform.

3. The injection molding machine for producing low-voltage electrical component housings according to claim 2, characterized in that: The bottom area of ​​the flow guide platform is the same as the top surface area of ​​the sealing plate.

4. The injection molding machine for producing low-voltage electrical component housings according to claim 3, characterized in that: The top area of ​​the flow guide platform is the same as the area of ​​the end of the connecting rod it contacts.

5. The injection molding machine for producing housings of low-voltage electrical components according to any one of claims 1-4, characterized in that: A sealing plate is slidably installed at the feeding port, and the sealing plate is connected to the connecting rod.

6. The injection molding machine for producing low-voltage electrical component housings according to claim 5, characterized in that: The sealing plate is located at the top of the inner side of the material cylinder, with a guide plate inclined downward. The guide plate is fixedly connected to the connecting rod, and the sealing plate establishes a connection with the connecting rod through the guide plate.

7. The injection molding machine for producing low-voltage electrical component housings according to claim 6, characterized in that: The width of the guide plate is smaller than the width of the feeding plate.

8. The injection molding machine for producing low-voltage electrical component housings according to claim 1, characterized in that: The top of the material cylinder is detachably provided with a top plate, and the top plate is provided with an air pressure balance hole. The linear drive unit is disposed on the top plate.

9. The injection molding machine for producing housings of low-voltage electrical components according to claim 1, characterized in that: The material guiding section includes a guide pipe that communicates with the feeding port. The guide pipe is arranged at an inclination relative to the feeding port. A vertically arranged storage pipe is connected to the guide pipe, and a feeding hopper is provided at the top of the storage pipe.

10. The injection molding machine for producing housings of low-voltage electrical components according to claim 9, characterized in that: The bottom wall of the guide tube is equipped with a motor-driven feeding rod.

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