CN-118876342-B - Die convenient for die sinking and used for producing and processing desk lamp shade

CN118876342BCN 118876342 BCN118876342 BCN 118876342BCN-118876342-B

Abstract

The invention discloses a die for producing and processing a desk lamp lampshade convenient for die opening, which relates to the technical field of lampshade injection molding production and comprises a female die and a male die, wherein the female die and the male die adopt a vertical separation mode, the female die and the male die are composed of an outer metal shell and an inner breathable steel, a cavity is formed between the metal shell and the breathable steel, the cavity in the female die and the cavity in the male die are communicated, an injection pipe is arranged in the middle of the male die and above the inner part of the male die, one side of the male die is provided with an air injection pipe, one end of the air injection pipe is communicated with an air pump, the air injection pipe is communicated with the cavity, and an electric heating system and a water cooling system are arranged in the female die and the male die. According to the invention, the breathable steel is adopted as the forming cavity, and the negative pressure mechanism and the pressure maintaining mechanism are matched, so that the molten plastic can be ensured to fill the whole forming cavity during the forming process of the molten plastic, and the yield of the lampshade production is improved.

Inventors

WANG ZHIFEI
HUANG XU
XU JIAN
DING KE

Assignees

江苏旭耀光电技术有限公司

Dates

Publication Date: 20260505
Application Date: 20240717

Claims (3)

1. The die is characterized by comprising a female die (1) and a male die (2), wherein the female die (1) and the male die (2) adopt a vertical separation mode, the female die (1) and the male die (2) are composed of an outer metal shell and an inner breathable steel, a cavity (3) is formed between the metal shell and the breathable steel, the cavity (3) in the female die (1) and the male die (2) are communicated, an injection molding pipe (4) is arranged in the middle of the male die (2), and the injection molding pipe (4) is arranged above the inner part of the male die (2); one side of the male die (2) is provided with an air injection pipe (5), one end of the air injection pipe (5) is communicated with an air pump, the air injection pipe (5) is communicated with the cavity (3), and an electric heating system and a water cooling system are arranged inside the female die (1) and the male die (2); the water cooling system comprises a water pump and a control valve (7), the control valve (7) is positioned below one side of the male die (2), and the control valve (7) is communicated with the cavity (3); A communicating pipe (8) is arranged in the cavity (3), the communicating pipe (8) is U-shaped, and the communicating pipe (8) is communicated with the water pump through an annular guide rail (801); The number of the communicating pipes (8) is several, an annular guide rail (801) is arranged between the communicating pipes (8) and the lower inner wall of the male die (2), the communicating pipes (8) are in sliding connection with the annular guide rail (801), and a water outlet is formed in one side of each communicating pipe (8); Two blades (802) are arranged on the outer side of each communicating pipe (8), the blades (802) on the outer side are connected with the communicating pipes (8) through spring shafts, limiting grooves are formed in the connecting positions of the blades (802) and the communicating pipes (8), and the limiting grooves are used for limiting deflection angles of the blades (802) relative to the communicating pipes (8); A movable telescopic sleeve (9) is arranged above two ends of the communicating pipe (8), a floating plate (901) is arranged at the upper end of the sleeve (9), an opening is formed in one side of the floating plate (901), and the floating plate (901) is connected with the communicating pipe (8) through the sleeve (9); The air pump is communicated with the annular guide rail (801) through the air injection pipe (5), and the air pump is electrically connected with the control valve (7).
2. The die for producing and processing the desk lamp shade convenient to open the die is characterized in that a circular through hole is formed in the middle of the male die (2), the injection molding pipe (4) is located in the middle of the through hole, a piston plate (6) is arranged on the outer side of the injection molding pipe (4), a round hole matched with the injection molding pipe (4) is formed in the middle of the piston plate (6), the piston plate (6) is connected with the male die (2) in a sliding mode, the piston plate (6) is connected with the male die (2) through a driving rod, and a pressure monitoring element is arranged in the output end of the driving rod.
3. The die for producing and processing the desk lamp shade convenient to open the die, which is characterized in that a stop plate (601) is arranged above the middle part of the piston plate (6), the stop plate (601) is connected with the injection molding pipe (4) through a spring, the stop plate (601) is in an inverted truncated cone shape, and the lower end surface structure of the stop plate (601) is matched with the inner wall surface structure of the round hole.

Description

Die convenient for die sinking and used for producing and processing desk lamp shade Technical Field The invention relates to the technical field of lamp shade injection molding production, in particular to a die for producing and processing a desk lamp shade, which is convenient to open. Background The desk lamp is used as a common lighting tool in daily life, and has practicability and certain decoration. The design and manufacture of desk lamps involves several aspects, wherein the design of the injection mold of the lamp housing is an important link to ensure product quality and production efficiency. With the development of manufacturing technology, mold manufacturing has shifted from traditional manual manufacturing to numerical control machining and rapid prototyping techniques. The application of these techniques greatly improves the manufacturing accuracy and production efficiency of the mold. During the injection molding production of the lampshade, because the molten plastic or air in the molding cavity cannot be taken out in time, internal bubbles are compressed during the pressure-maintaining molding process, and after the molding, the bubbles expand at normal temperature, so that the surface of an injection molding part is sunken, and the yield is reduced. Disclosure of Invention The invention aims to provide a die for producing and processing a desk lamp shade, which is convenient for die opening, so as to solve the problems in the background technology. In order to solve the technical problems, the invention provides the technical scheme that the die for producing and processing the desk lamp shade is convenient to open, the die comprises a female die and a male die, the female die and the male die adopt a vertical separation mode, the female die and the male die are composed of an outer metal shell and an inner breathable steel, a cavity is arranged between the metal shell and the breathable steel, the cavity in the female die and the cavity in the male die are communicated, an injection pipe is arranged in the middle of the male die, and the injection pipe is arranged above the inner part of the male die; an air injection pipe is arranged at one side of the male die, one end of the air injection pipe is communicated with an air pump, the air injection pipe is communicated with the cavity, and an electric heating system and a water cooling system are arranged inside the female die and the male die; The female die and the male die are matched under the action of a hydraulic mechanism of the injection molding machine, the male die is fixedly connected with the injection molding machine, the female die is connected with the output end of the hydraulic mechanism, the female die moves from top to bottom until the female die and the male die are tightly connected under the action of the hydraulic mechanism, the inner layers of the female die and the male die are formed into a cavity by air-permeable steel, a cavity is formed between the outer layer metal shell and the air-permeable steel, the cavity is connected with a water cooling system, the connection part of the cavity inside the female die and the male die is in meshed connection, and a sealing rubber strip is arranged on a contact surface; After the female die and the male die are combined, the injection molding machine injects heated and melted plastic into a molding cavity through an injection molding pipe, and as the injection molding pipe is arranged above the inner part of the female die, the molten plastic is filled in the molding cavity under the action of gravity and injection molding pressure, an air pump at one side of the mold is synchronously started during injection molding of the molten plastic, the air pump is communicated with a cavity through a pipeline, and the cavity is in a low-pressure state during the working period of the air pump; During injection of molten plastic, since the output end of the injection molding pipe is positioned above the inside of the molding cavity, bubbles in the molten plastic enter the cavity through the breathable steel under the action of negative pressure during filling of the molten plastic into the molding cavity, and finally leave under the action of the air pump, meanwhile, the position of the output port of the injection molding pipe is set, after the molten plastic initially enters the molding cavity, the bubbles in the molten plastic directly overflow under the action of the negative pressure and flow around under the action of gravity and injection pressure, and the position of the output port of the injection molding pipe is set, so that the bubbles in the molten plastic do not need to move upwards from the bottom of the molding cavity, and after the molten plastic enters the molding cavity, the bubbles are rapidly removed under the action of the negative pressure, so that the movement path of the bubbles is shortened; The electric heating system is synchronously started during inj