A device for preventing material from leaking when opening and closing mold

Abstract

The present invention is applicable to the field of injection molds, and provides a device for preventing material leakage when opening and closing a mold, comprising a mold, a material inlet is arranged on the top of the mold, a receiving groove is arranged on one side of a guide plate that is in contact with the mold, a material feed pipe is installed in the receiving groove, a material feed end of the material feed pipe is fixedly connected to a material injection nozzle, a material discharge end of the material feed pipe is fixedly connected to an inlet end of a material feed nozzle for entering the mold, an outlet end of the material feed nozzle for entering the mold is communicated with the material inlet, a guide plate is fixed above the mold, an upper cover is fixed above the guide plate, a mold material nozzle lifting shaft is arranged above the material feed nozzle for entering the mold, a mounting groove is arranged at the lower end of the mold material nozzle lifting shaft, the material feed nozzle for entering the mold is installed in the mounting groove of the mold material nozzle lifting shaft, a fixing plate of the material feed nozzle for entering the mold is installed at the top position of the upper cover by means of a plurality of screws, a buffer device is arranged between the plurality of screws and the fixing plate of the material feed nozzle for entering the mold, and the buffer device is used to make the material feed nozzle for entering the mold in contact with the upper mold of the mold, so as to prevent material from leaking out from between the material feed nozzle for entering the mold and the mold.

Description

Technical Field

[0001] The invention belongs to the field of injection molds, and in particular relates to a device that prevents material from leaking when opening and closing a mold. Background Art

[0002] An injection mold is a tool for producing plastic or rubber products; it is also a tool that gives plastic or rubber products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the high-pressure injection of heated and melted (or solidified) plastic or rubber into the mold cavity by an injection machine, and after cooling or heating and solidification, a molded product is obtained. The injection mold consists of a movable mold and a fixed mold. The movable mold is installed on the movable mold of the injection molding machine, and the fixed mold is installed on the fixed mold of the injection molding machine. During injection molding, the movable mold and the fixed mold are closed to form a pouring system and a cavity. When the mold is opened, the movable mold and the fixed mold are separated to remove the plastic or rubber product.

[0003] The existing injection mold has material leakage when opening and closing the mold, which will cause inaccurate dosage of raw materials reaching the mold cavity. Summary of the invention

[0004] The invention provides a device for preventing material leakage when opening and closing a mold, aiming to solve the problem of material leakage when opening and closing a mold in an existing injection mold.

[0005] The present invention is implemented as follows: a device for preventing material leakage when opening and closing a mold comprises a mold, wherein a feed port is arranged on the top of the mold, the mold is clamped in a fixed groove of a guide plate, a receiving groove is arranged on a surface of the guide plate that is in contact with the mold, a feed pipe is installed in the receiving groove, a feed end of the feed pipe is fixedly connected to a material injection nozzle, the material injection nozzle is installed on one side of the guide plate, a discharge end of the feed pipe is fixedly connected to an inlet end of a material injection nozzle, an outlet end of the material injection nozzle corresponds to a feed port on the top of the mold and the outlet end is connected to the feed port, the guide plate is fixed above the mold, and an upper top is fixed above the guide plate A cover, a mold nozzle lifting shaft is provided above the mold nozzle, a mounting groove is opened at the lower end of the mold nozzle lifting shaft, the mold nozzle is installed in the mounting groove of the mold nozzle lifting shaft, the mold nozzle lifting shaft passes through the guide plate and the upper top cover, and the upper end of the mold nozzle lifting shaft is threadedly connected with an up and down adjusting nut, the mold nozzle fixing plate is installed on the top of the upper top cover through a plurality of screws, the upper and lower adjusting nuts are engaged between the mold nozzle fixing plate and the upper top cover, the mold nozzle fixing plate is installed at the top position of the upper top cover through a plurality of screws, and a buffer device is arranged between the plurality of screws and the mold nozzle fixing plate.

[0006] Furthermore, a heat insulation plate is arranged between the guide plate and the upper cover, and the heat insulation plate is fixed to the top of the guide plate by screws.

[0007] Furthermore, the inlet end and the outlet end of the mold feeding nozzle form a certain angle.

[0008] Furthermore, an up and down adjustment handle is provided on the up and down adjustment nut.

[0009] Furthermore, a mounting plate is provided on one side of the upper cover close to the shooting nozzle, a stop cylinder is fixedly connected to the upper part of the mounting plate, the stop cylinder is driven by a hydraulic power device and a stop core shaft is connected to the output end of the stop cylinder, a through hole is opened at the lower end of the stop core shaft, and a through hole is provided on the shooting nozzle corresponding to the stop core shaft.

[0010] Furthermore, a mounting plate is provided on one side of the upper cover close to the shooting nozzle, a cylinder is fixedly connected to the upper part of the mounting plate, the cylinder is driven by a pneumatic device and a stop core shaft is connected to the output end of the cylinder, a through hole is opened at the lower end of the stop core shaft, and a through hole is provided on the shooting nozzle corresponding to the stop core shaft.

[0011] Furthermore, a plurality of mounting holes are provided on both sides of the upper cover.

[0012] The inlet and outlet ends of the mold feed nozzle of the present invention are in the shape of elbows, which can buffer the impact force of the material shot from the feed pipe. The mold feed nozzle lifting shaft and the upper and lower adjustment nuts on the mold feed nozzle can be used to fine-tune the mold feed nozzle, thereby achieving the purpose of adjusting the relative position of the mold feed nozzle and the feed port, that is, adjusting the size of the gap between the mold feed nozzle and the feed port. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The present invention is a schematic structural diagram of a device for preventing material leakage during mold opening and closing.

[0014] Figure 2 The present invention is a cross-sectional view of a device for preventing material leakage during mold opening and closing.

[0015] Figure 3 It is a schematic diagram of a third embodiment of a device for preventing material leakage when opening and closing a mold provided by the invention.

[0016] Figure 4 The invention provides a schematic diagram of the bottom of a guide plate of a device that does not leak material when opening and closing a mold.

[0017] Figure 5 The invention provides a schematic diagram of the cooperation between a mold nozzle and a mold nozzle lifting shaft for preventing material leakage when opening and closing a mold. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0019] Embodiment 1

[0020] like Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, this embodiment provides a device for preventing material leakage when opening and closing a mold, comprising a mold 1, wherein a feed port is arranged at the top of the mold 1, the feed port is communicated with the mold cavity, the mold 1 is clamped in the fixing groove 16 of the guide plate 2, a receiving groove is arranged on the side of the guide plate 2 that is in contact with the mold 1, a feed pipe 13 is installed in the receiving groove, the feed end of the feed pipe 13 is fixedly connected to the injection nozzle 5, the injection nozzle is installed on one side of the guide plate 2, and the discharge end of the feed pipe 13 is fixedly connected to the mold injection nozzle 1 4, the outlet end 18 of the mold inlet nozzle 14 corresponds to the inlet port on the top of the mold 1 and the outlet end 18 is connected to the inlet port, the guide plate 2 is fixed above the mold 1, and the upper cover 4 is fixed above the guide plate 2, and a mold nozzle lifting shaft 12 is provided above the mold inlet nozzle 14, and a mounting groove is opened at the lower end of the mold nozzle lifting shaft 12, and the mold inlet nozzle 14 is installed in the mounting groove of the mold nozzle lifting shaft 12, and the mold nozzle lifting shaft 12 passes through the guide plate 2 and the upper cover 4 and the upper end of the mold nozzle lifting shaft 12 is connected with an up-and-down adjusting nut 11 through a thread, the mold nozzle fixing plate 9 is installed on the top of the upper cover 4 through a plurality of screws, the up-and-down adjusting nut 11 is engaged between the mold nozzle fixing plate 9 and the upper cover 4 (a certain gap is left at the installation position of the up-and-down adjusting nut 11), the mold nozzle fixing plate 9 is installed at the top position of the upper cover 4 through a plurality of screws 20, and a buffer device 19 is provided between the plurality of screws 20 and the mold nozzle fixing plate 9. The buffer device 19 can be a spring, a cylinder or other. The buffer device 19 always has a downward force on the mold nozzle fixing plate 9, so that when the mold is opened, the mold nozzle 14 has a downward force. When the mold is opened, the upper mold of the mold is loose, and the downward force makes the mold nozzle 14 fit the mold upper mold, filling the gap between the mold nozzle 14 and the mold 1 to prevent the material from leaking from the mold nozzle 14 and the feed port on the mold 1. When the mold is closed, the buffer device 19 can also buffer the impact force generated when the mold is closed.

[0021] Working principle of the present invention: material is injected from the injection nozzle 5 by an external injection device (not shown), and enters the mold cavity through the feed pipe 13 from the outlet end 18 of the mold feed nozzle 14 and the feed port of the mold 1, and a product is formed in the mold cavity of the mold 1. Through the buffer device 19, the mold feed nozzle 14 and the feed port on the mold 1 are tightly attached when the mold is opened and closed.

[0022] The present invention has a buffer device 19 installed between the screw 20 and the mold nozzle fixing plate 9. The buffer device 19 always has a downward force on the mold nozzle fixing plate 9. The buffer device 19 makes the mold nozzle 14 always have a downward force. When the mold is opened, the upper mold of the mold is loosened, and the downward force makes the mold nozzle 14 fit the upper mold of the mold, filling the gap between the mold nozzle 14 and the mold 1, preventing the material from leaking from between the mold nozzle 14 and the mold 1.

[0023] Embodiment 2

[0024] Based on the first embodiment, Figure 1 As shown, a heat insulation plate 3 is arranged between the guide plate 2 and the upper top cover 4, and the heat insulation plate 3 is fixed to the top of the guide plate 2 by screws. When the injection nozzle 5 injects material, a large amount of heat will be introduced, which will affect the normal operation of the components on the upper top cover 4. By arranging the heat insulation plate 3 between the guide plate 2 and the upper top cover 4, the heat of the guide plate 2 can be isolated to prevent the heat from being transferred from the guide plate 2 to the upper top cover 4.

[0025] Embodiment 3

[0026] Based on the first embodiment, Figure 3 As shown, the inlet end 17 and the outlet end 18 of the mold feeding nozzle 14 are at a certain angle and can be elbow-shaped or flat. When the material is injected from the injection nozzle 5, it passes through a certain angle between the inlet end 17 and the outlet end 18, which can buffer the impact force of the material injected from the feed pipe 13.

[0027] Embodiment 4

[0028] Based on the first embodiment, Figure 1 As shown, the up and down adjustment nut 11 is provided with an up and down adjustment handle 10. By rotating the up and down adjustment handle 10, the up and down adjustment nut 11 is driven to rotate, thereby fine-tuning the mold nozzle lifting shaft 12, and then fine-tuning the position of the mold nozzle 14.

[0029] Embodiment 5

[0030] Based on the first embodiment, Figure 1As shown, a mounting plate is provided on one side of the upper cover 4 close to the shooting nozzle 5, and a stop cylinder 8 is fixedly connected to the upper portion of the mounting plate. The stop cylinder 8 is driven by a hydraulic power device (not shown in the figure) and a stop mandrel 6 is connected to the output end of the stop cylinder 8. A through hole is provided at the lower end of the stop mandrel 6, and a through hole is provided at a position corresponding to the stop mandrel 6 on the shooting nozzle 5 for inserting the stop mandrel 6. When the through hole at the lower end of the stop mandrel 6 is connected to the feed pipe opening of the shooting nozzle 5, material can be fed. The output of the stop cylinder 8 is controlled by the hydraulic power device, and the stop mandrel 6 at the output end of the stop cylinder 8 extends. When the through hole at the lower end of the stop mandrel 6 is not connected to the feed pipe opening of the shooting nozzle 5, the shooting can be stopped and the backflow of material can be prevented.

[0031] Embodiment 6

[0032] Based on the first embodiment, the difference from the fifth embodiment is that Figure 1 As shown, a mounting plate is provided on one side of the upper cover 4 close to the shooting nozzle 5, and a cylinder 8 is fixedly connected to the upper portion of the mounting plate. The cylinder 8 is driven by a pneumatic device (not shown in the figure) and a stop core shaft 6 is connected to the output end of the cylinder. A through hole is provided at the lower end of the stop core shaft 6, and a through hole is provided at a position corresponding to the stop core shaft 6 on the shooting nozzle 5 for inserting the stop core shaft 6. When the through hole at the lower end of the stop core shaft 6 is connected to the feed pipe opening of the shooting nozzle 5, material can be fed. The output of the cylinder 8 is controlled by a hydraulic power device, and the stop core shaft 6 at the output end of the cylinder 8 is extended. When the through hole at the lower end of the stop core shaft 6 is not connected to the feed pipe opening of the shooting nozzle 5, the shooting can be stopped and the backflow of the material can be prevented.

[0033] Embodiment 7

[0034] Based on the first embodiment, Figure 1 As shown, a plurality of mounting holes are provided on both sides of the upper cover 4, and the feed nozzle device can be connected to the machine through the mounting holes on both sides of the upper cover.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for preventing material leakage when opening and closing a mold, characterized in that: The present invention comprises a mold, wherein a material inlet is arranged on the top of the mold, the mold is engaged in the fixing groove of the guide plate, a containing groove is provided on the side of the guide plate which is in contact with the mold, a material inlet pipe is installed in the containing groove, a material inlet end of the material inlet pipe is fixedly connected to a material injection nozzle, the material injection nozzle is installed on one side of the guide plate, a material inlet end of the material inlet pipe is fixedly connected to an inlet end of a material inlet nozzle, an outlet end of the material inlet nozzle corresponds to the material inlet on the top of the mold and the outlet end is communicated with the material inlet, the guide plate is fixed above the mold, an upper cover is fixed above the guide plate, a mold nozzle lifting shaft is provided above the material inlet nozzle, a mounting groove is provided at the lower end of the mold nozzle lifting shaft, the mold nozzle is installed in the mounting groove of the mold nozzle lifting shaft, the mold nozzle lifting shaft passes through the guide plate and the upper cover, and an upper end of the mold nozzle lifting shaft is threadedly connected with an upper and lower adjusting nut, and the mold nozzle fixing plate is connected by several The screw is installed on the top of the upper cover, and the upper and lower adjusting nuts are clamped between the mold nozzle fixing plate and the upper cover, and the mold nozzle fixing plate is installed at the top position of the upper cover through a plurality of screws, and a buffer device is arranged between the screws and the mold nozzle fixing plate, and a heat insulation plate is arranged between the guide plate and the upper cover, and the heat insulation plate is fixed to the top of the guide plate by screws. A mounting plate is provided on the side of the upper cover close to the injection nozzle, and a stop cylinder is fixedly connected to the upper part of the mounting plate, and the stop cylinder is driven by a hydraulic power device and a stop spindle is connected to the output end of the stop cylinder, a through hole is opened at the lower end of the stop spindle, and a through hole is arranged on the injection nozzle corresponding to the stop spindle; or, a cylinder is fixedly connected to the upper part of the mounting plate, and the cylinder is driven by a pneumatic device and a stop spindle is connected to the output end of the cylinder, a through hole is opened at the lower end of the stop spindle, and a through hole is arranged on the injection nozzle corresponding to the stop spindle.

2. A device for preventing material leakage during mold opening and closing as claimed in claim 1, characterized in that: The inlet end and the outlet end of the mold feeding nozzle are at a certain angle.

3. A device for preventing material leakage during mold opening and closing as claimed in claim 1, characterized in that: The up and down adjusting nut is provided with an up and down adjusting handle.

4. A device for preventing material leakage during mold opening and closing as claimed in claim 1, characterized in that: A plurality of mounting holes are provided on both sides of the upper cover.

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