CN-116038993-B - Plastic product vertical injection frame used on hydraulic press and injection molding method

CN116038993BCN 116038993 BCN116038993 BCN 116038993BCN-116038993-B

Abstract

The invention belongs to the technical field of injection molding production equipment, and particularly relates to a plastic product vertical injection frame used on a hydraulic press and an injection molding method. The vertical injection frame for plastic products used on the hydraulic press comprises a pressurizing mechanism, a material containing mechanism and a supporting mechanism, wherein the bottom of the pressurizing mechanism can be connected to the material containing mechanism in an up-and-down movable mode, and the material containing mechanism can be connected to the supporting mechanism in an up-and-down movable mode. According to the invention, the vertical injection frame of the plastic product used on the hydraulic machine is connected and fixed with one hydraulic machine, so that the common hydraulic machine can be transformed into vertical injection equipment to realize vertical injection, and after the vertical injection frame of the plastic product is removed, the normal use of the hydraulic machine is not affected, so that one machine of the common hydraulic machine is multipurpose. The invention has simple structure, convenient disassembly and operation, small occupied area and easy transportation, and is particularly suitable for producing small multi-insert injection molding products.

Inventors

ZHANG CHANGAN
NIU DEYU
XU YAOLI
MA WEIPING
LIU JUANLI
WANG FENG
LI HAIJIAN
ZHANG MEI

Assignees

中船重工西安东仪科工集团有限公司

Dates

Publication Date: 20260508
Application Date: 20221116

Claims (7)

1. The vertical injection frame for the plastic products, which is used on the hydraulic machine, is at least characterized by further comprising a pressurizing mechanism, a material containing mechanism and a supporting mechanism, wherein the bottom of the pressurizing mechanism can be connected to the material containing mechanism in an up-and-down moving way, and the material containing mechanism can be connected to the supporting mechanism in an up-and-down moving way; The pressurizing mechanism comprises an upper fixing plate (1), an upper base plate (2), a long pressure rod (4), upper support rods (5) and copper pressure heads (6), wherein the length of the long pressure rod (4) is smaller than that of the upper support rods (5), the top end of the long pressure rod (4) is connected to the central position of the upper surface of the upper base plate (2), the bottom end of the long pressure rod (4) vertically penetrates through the upper base plate (2) to be arranged below the upper base plate (2), the bottom ends of the long pressure rods (4) are detachably connected with the copper pressure heads (6), the upper support rods (5) are provided with two upper support rods (5) which are symmetrically arranged on two sides of the long pressure rod (4), the top end of each upper support rod (5) is connected to the upper surface of the upper base plate (2), the bottom end of each upper support rod (5) vertically penetrates through the upper base plate (2) to be connected to a material containing mechanism, and the bottom end of each upper support rod (5) is connected with a nut for fixing with the material containing mechanism; the feeding mechanism comprises a supporting plate (8), a feeding barrel (12) and an injection nozzle (13), wherein the upper part of the feeding barrel (12) is detachably connected to the supporting plate (8), the bottom end of the feeding barrel (12) is detachably connected with the injection nozzle (13), and the outer side wall of the feeding barrel (12) is connected with a heating mechanism; The supporting mechanism comprises four lower supporting rods (9), a lower base plate (14) and lower fixing plates (15), wherein the four lower supporting rods (9) are vertically connected to the lower base plate (14), the lower fixing plates (15) are detachably connected to the lower surface of the lower base plate (14), the material containing mechanism can be connected to the four lower supporting rods (9) in an up-down moving mode, and nuts (7) penetrate through the material containing mechanism at the top ends of the four lower supporting rods (9).
2. The vertical injection frame for plastic products used on the hydraulic press as set forth in claim 1, characterized in that the long pressing rod (4) is an integral structure formed by three cylinders with sequentially reduced outer diameters, namely an upper cylinder, a middle cylinder and a lower cylinder, the upper cylinder is lapped on the upper surface of the upper base plate (2), the outer side wall of the lower cylinder is provided with threads connected with the copper pressing head (6), the outer diameter of the middle cylinder is smaller than the outer diameter of the copper pressing head (6), the upper supporting rod (5) is cylindrical, the top end of the upper supporting rod is provided with a boss, and the side wall of the bottom end of the upper supporting rod is provided with threads for connecting nuts.
3. A plastic vertical injection frame for a hydraulic press according to claim 2 is characterized in that the upper base plate (2) and the upper fixing plate (1) are rectangular steel plates, a first shoulder hole (18) for connecting a long pressing rod (4) is formed in the center of the upper base plate (2), four first threaded holes (19) for connecting the upper base plate (2) and the upper fixing plate (1) are formed in the center of the first shoulder hole (18), the four first threaded holes (19) are located on four corners of a square with the first shoulder hole (18) as the center, second shoulder holes (20) for connecting an upper supporting rod (5) are symmetrically formed in the left and right positions of the first shoulder hole (18), two first U-shaped grooves (22) are formed in the opposite side edges of the upper base plate (2) and correspond to each other, the first U-shaped grooves (22) are formed in the upper fixing plate (1) and the upper base plate (2) in the same size, the first U-shaped grooves (21) are formed in the positions of the upper fixing plate (1) and correspond to the four first threaded holes (19), and the second U-shaped grooves (23) are formed in the positions of the upper fixing plate (1) and correspond to the second U-shaped grooves (23) when bolts pass through the first U-shaped grooves and the second U-shaped grooves (22) and pass through the first U-shaped grooves.
4. A plastic vertical injection frame for a hydraulic press according to claim 1, wherein the copper pressure head (6) is a copper cylinder, a circular groove with an open upper end is arranged at the center of the upper part of the copper pressure head, and threads for connecting with the bottom end of the long pressure rod (4) are arranged on the inner side wall of the groove.
5. A plastic vertical injection frame used on a hydraulic press as set forth in claim 1 is characterized in that the charging barrel (12) is a cylinder with hollow inside and open top and bottom, a convex ring (25) used for being connected with a supporting plate (8) is arranged on the outer side wall of the upper end of the charging barrel (12), a first connecting hole (26) is formed in the convex ring (25), a shoulder (27) is arranged on the inner side wall of the lower end of the charging barrel (12), threads connected with an injection nozzle (13) are arranged on the side wall of the shoulder (27), the heating mechanism is an electric heating ring (11), the electric heating ring (11) is connected onto the charging barrel (12) along the circumferential direction, six second connecting holes (30) which are symmetrical in the center of the charging barrel connecting holes (29), two upper holes (17) which are symmetrical in the left-right direction and four lower supporting rod holes (16) which are symmetrical in the center are formed in the center of the charging barrel connecting holes (29).
6. A plastic product vertical injection frame used on a hydraulic machine is characterized in that an injection nozzle (13) is of an integrated structure formed by cylinders with different outer diameters at upper, middle and lower sections and hemispheres arranged at the lower end, the outer diameter of a middle section cylinder is larger than that of a lower section cylinder, the outer diameter of the lower section cylinder is larger than that of the upper section cylinder, the diameter of a hemispheroid is smaller than that of the upper section cylinder, threads connected with a charging barrel (12) are arranged on the outer side wall of the upper section cylinder, the upper part of an inner cavity of the injection nozzle (13) is a circular cavity, the lower part of the inner cavity is a round table-shaped cavity with the upper part being large and the lower part being small, and the bottom end of the round table-shaped cavity is a discharge hole (28).
7. An injection molding method of a plastic vertical injection frame used on a hydraulic press is characterized in that the plastic vertical injection frame used on the hydraulic press according to any one of claims 1-6 is adopted, comprising the following steps, The method comprises the steps that firstly, a plastic product vertical injection frame used on a hydraulic machine is integrally placed on a table top of the hydraulic machine, and after the position is adjusted, an upper fixing plate (1) on a pressurizing mechanism is fixed with the table top of a movable cross beam of the hydraulic machine; Starting the hydraulic press to enable the long pressing rod (4) on the pressurizing mechanism and the copper pressing head (6) to move freely up and down in the charging barrel (12) of the material containing mechanism; Step three, the lower fixing plate (15) in the supporting mechanism is fixed with the table top of the hydraulic press when the copper pressure head (6) is adjusted to enter the charging barrel (12) and the height is 1/2; starting the hydraulic press, lifting the pressurizing mechanism, adding plastic raw materials into a charging barrel (12) in the supporting mechanism, and starting a power supply of the electric heating ring (11) to start heating; placing a mold to be injection molded under an injection nozzle (13) in the material containing mechanism, and aligning the injection mold to a glue inlet; Operating a hydraulic press to enable a pressurizing mechanism to move downwards, enabling a copper pressure head (6) on the pressurizing mechanism to enter a charging barrel (12), pressurizing heated molten state plastic in the charging barrel (12), and injecting the pressurized molten state plastic into a die through a discharge hole (28) at the bottom of an injection nozzle (13); And step seven, after the pressure maintaining is carried out for a preset time, operating the hydraulic press to enable the pressurizing mechanism to ascend and drive the copper pressure head (6) to be pulled out of the charging barrel (12), and then enabling the upper supporting rod (5) in the pressurizing mechanism to pull the material containing mechanism to ascend so as to drive the supporting plate (8) in the material containing mechanism and the charging barrel (12) to ascend and take out the die, thus completing injection molding.

Description

Plastic product vertical injection frame used on hydraulic press and injection molding method Technical Field The invention belongs to the technical field of injection molding production equipment, and particularly relates to a plastic product vertical injection frame used on a hydraulic press and an injection molding method. Background A commonly used apparatus for injection molding of plastic articles is an injection molding machine. The injection molding machine is divided into a horizontal injection molding machine and a vertical injection molding machine. In the practical production, some small-sized or microminiature plastic products, especially small-sized insert plastic products with the required positioning, are very convenient to use a vertical injection molding machine for production, because the surface of a mold is upward, the insert is easier to put into and position, and the horizontal injection molding machine cannot surpass. However, when a certain very small amount of products with micro inserts are required to be produced by injection molding, the existing horizontal injection molding machine cannot realize production, the operation site lacks a vertical injection molding machine, but the production site is provided with a surplus three-beam four-column hydraulic machine in a waiting state, which is a common device for the compression molding of plastic products, and is about 45 tons. How to fully utilize the existing resources of the hydraulic press in the waiting state to replace the vertical injection molding machine to realize the vertical injection molding function, and to complete the injection molding production of a very small amount of products with micro inserts has certain necessity. Disclosure of Invention The invention provides a vertical injection frame of a plastic product and an injection molding method used on a hydraulic machine, and aims to provide a device and a method capable of realizing a vertical injection molding function by matching with the hydraulic machine. In order to achieve the above purpose, the invention adopts the following technical scheme: The vertical injection frame for the plastic products comprises a hydraulic machine, a pressurizing mechanism, a material containing mechanism and a supporting mechanism, wherein the bottom of the pressurizing mechanism is connected to the material containing mechanism in a vertically movable mode, the material containing mechanism is connected to the supporting mechanism in a vertically movable mode, the top of the pressurizing mechanism is detachably connected with a movable cross beam table top on the hydraulic machine, the supporting mechanism is detachably connected to the table top of the hydraulic machine, and a heating mechanism is arranged on the material containing mechanism. The pressurizing mechanism comprises an upper fixing plate, an upper base plate, long pressure rods, upper support rods and copper pressure heads, wherein the length of each long pressure rod is smaller than that of each upper support rod, the top ends of the long pressure rods are connected to the central position of the upper surface of the upper base plate, the bottom ends of the long pressure rods vertically penetrate through the upper base plate and are arranged below the upper base plate, the copper pressure heads are detachably connected to the bottom ends of the long pressure rods, the two upper support rods are symmetrically arranged on two sides of the long pressure rods, the top ends of each upper support rod are connected to the upper surface of the upper base plate, the bottom ends of each upper support rod vertically penetrate through the upper base plate and are connected to the material containing mechanism in a movable mode, nuts used for being fixed with the material containing mechanism are connected to the bottom ends of each upper support rod, and the upper fixing plate is detachably connected to the upper surface of the upper base plate. The long pressure rod is of an integrated structure formed by cylinders with sequentially reduced outer diameters, namely an upper cylinder, a middle cylinder and a lower cylinder, wherein the upper cylinder is lapped on the upper surface of an upper base plate, the outer side wall of the lower cylinder is provided with threads connected with a copper pressure head, the outer diameter of the middle cylinder is smaller than the outer diameter of the copper pressure head, the upper support rod is cylindrical, the top end of the upper support rod is provided with a boss, and the bottom end side wall of the upper support rod is provided with threads for connecting nuts. The upper base plate and the upper fixing plate are rectangular steel plates, a first shoulder hole for connecting a long pressing rod is formed in the center of the upper base plate, four first threaded holes for connecting the upper base plate and the upper fixing plate are formed in the first shoulder hole, the four