Moving mold assembly for injection molding

Abstract

The utility model discloses a movable mold assembly for injection molding, which comprises a fixed plate, a material pulling plate, a nut, a spring, pull rods and a movable mold plate, the material pulling plate is arranged below the fixed plate, the movable mold plate is arranged below the material pulling plate, the pull rods are arranged on two sides of the material pulling plate, first guide holes are symmetrically arranged in the movable mold plate, and the first guide holes are communicated with the first guide holes. A guide column is arranged in the first guide hole, a connecting rod which upwards penetrates through the material pulling plate and extends into the fixing plate is arranged at the top of the guide column, the nut is arranged on the connecting rod, a groove located above the nut is formed in the bottom face of the material pulling plate in an inwards-concave mode, and a limiting sleeve which upwards extends into the groove is arranged on the nut. And the spring is arranged in the limiting sleeve. Through the mode, the movable mold assembly for injection molding can be used for separating a material head from a plastic part and separating the material head from a pouring gate, and the downward moving distance of the material pulling plate relative to the fixed plate can be adjusted.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to a movable mold component for injection molding. Background Art

[0002] In the process of plastic injection molding, injection molds are indispensable. The injection mold consists of a fixed mold and a movable mold. After the molds are closed, the molten plastic is input into the mold cavity composed of the fixed mold and the movable mold, and the plastic parts are cooled and solidified. Finally, the mold is opened to take out the plastic parts.

[0003] In fact, what is cooled and solidified in the mold cavity of the injection mold is the slug and the plastic part connected to the slug, and the slug needs to be separated from the plastic part. To this end, the injection mold can limit the movable mold plate through a pull rod. When opening the mold, the relative movement between the movable mold plate and the pull plate is used to separate the slug from the plastic part, and then the relative movement between the pull plate and the fixed plate is used to separate the slug from the gate. The relative movement distance between the movable mold plate and the pull plate can be determined by the design of the pull rod, but the relative movement distance between the movable mold plate and the pull plate is difficult to control or adjust, and needs to be improved. Utility Model Content

[0004] The main technical problem solved by the utility model is to provide a movable mold assembly for injection molding, which can realize the separation of the material head and the plastic part, and can adjust the relative moving distance between the movable mold plate and the material pulling plate when opening the mold.

[0005] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a movable mold assembly for injection molding, including: a fixed plate, a pulling plate, a nut, a spring, a pull rod and a movable mold plate, the pulling plate is arranged below the fixed plate, the movable mold plate is arranged below the pulling plate, the pull rod is arranged on both sides of the pulling plate, and the bottom of the pull rod extends downward to both sides of the movable mold plate, the movable mold plate is symmetrically provided with a first guide hole, a guide column is arranged in the first guide hole, a connecting rod that passes through the pulling plate upward and extends to the fixed plate is arranged on the top of the guide column, the nut is arranged on the connecting rod, the bottom surface of the pulling plate is concavely provided with a groove located above the nut, the nut is provided with a limit sleeve that extends upward into the groove, the spring is arranged in the limit sleeve, and the top of the spring extends upward to the top surface of the groove.

[0006] In a preferred embodiment of the present utility model, the pull rod is provided with a first screw connected to the pulling plate.

[0007] In a preferred embodiment of the utility model, the pull rod is provided with a vertically extending waist hole, and a second screw connected to the movable template is provided in the waist hole.

[0008] In a preferred embodiment of the present invention, the diameter of the connecting rod is smaller than the diameter of the guide column to form a stepped shaft.

[0009] In a preferred embodiment of the utility model, a socket corresponding to the connecting rod is provided at the bottom of the fixing plate, a mounting hole connected to the socket is provided at the top of the fixing plate, and a third screw connected to the connecting rod is provided in the mounting hole.

[0010] In a preferred embodiment of the present invention, the diameter of the mounting hole is larger than the diameter of the insertion hole to form a stepped hole.

[0011] In a preferred embodiment of the present invention, the connecting rod is provided with an external thread corresponding to the nut.

[0012] In a preferred embodiment of the present invention, a second guide hole corresponding to the connecting rod and extending to the top surface of the pulling plate is provided on the top of the groove.

[0013] In a preferred embodiment of the present invention, the spring is concentric with the connecting rod.

[0014] In a preferred embodiment of the present invention, the nut and the limiting sleeve adopt an integrated steel structure.

[0015] The beneficial effects of the utility model are as follows: the utility model points out a movable mold assembly for injection molding, after the mold is closed, the fixed plate, the pulling plate and the movable mold plate are tightly stacked up and down, which is conducive to the molten plastic entering the movable mold plate through the pulling plate, and cooperating with the fixed mold to form the injection molded parts. When the mold is opened, the fixed plate drives the pulling plate to move up, first maintaining the contact between the movable mold plate and the fixed mold, prolonging the cooling time, and using the relative movement between the movable mold plate and the pulling plate to achieve the separation of the material head in the pulling plate and the plastic part under the movable mold plate, and then using the pull rod to pull the pulling plate down, so as to achieve the downward movement of the pulling plate relative to the fixed plate and the separation of the material head from the gate. The spacing between the limit sleeve and the top surface of the groove can also be adjusted by rotating the nut, so as to change the downward movement distance of the pulling plate relative to the fixed plate, and ensure the complete separation of the material head from the gate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a structural schematic diagram of a preferred embodiment of a movable mold assembly for injection molding of the utility model;

[0018] Figure 2yes Figure 1 Schematic diagram of the structure in which the pulling plate and the movable template move downward relative to the fixed plate. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1~Figure 2 , the utility model embodiment includes:

[0021] like Figure 1 and Figure 2 The movable mold assembly for injection molding shown in FIG. 1 includes: a fixed plate 1, a material pulling plate 2, a nut 18, a spring 15, a pull rod 4 and a movable mold plate 3. The material pulling plate 2 is arranged below the fixed plate 1, and the movable mold plate 3 is arranged below the material pulling plate 2. After the mold is closed, as shown in FIG. Figure 1 As shown, the fixed plate 1, the drawing plate 2 and the movable mold plate 3 are closely stacked up and down, which is conducive to the molten plastic entering the movable mold plate 3 through the drawing plate 2 and cooperating with the fixed mold to form the injection molded part.

[0022] The tie rod 4 is arranged on both sides of the drawing plate 2, and the bottom of the tie rod 4 extends downward to both sides of the movable plate 3. In this embodiment, the tie rod 4 is provided with a first screw 12 connected to the drawing plate 2, and the structure is firm. The tie rod 4 is provided with a vertically extending waist hole 14, and a second screw 13 connected to the movable plate 3 is arranged in the waist hole 14. Through the cooperation of the waist hole 14 and the second screw 13, the travel limit of the movable plate 3 moving downward relative to the drawing plate 2 after the mold is opened is realized.

[0023] A first guide hole 6 is symmetrically arranged in the movable template 3, a guide column 5 is arranged in the first guide hole 6, a connecting rod 8 is arranged on the top of the guide column 5, which passes through the drawing plate 2 upward and extends to the fixed plate 1. In this embodiment, a plug hole 9 corresponding to the connecting rod 8 is arranged at the bottom of the fixed plate 1, and a mounting hole 11 connected to the plug hole 9 is arranged at the top of the fixed plate 1. A third screw 10 connected to the connecting rod 8 is arranged in the mounting hole 11 to fix the connecting rod 8. The diameter of the mounting hole 11 is larger than the diameter of the plug hole 9 to form a stepped hole, and the head of the third screw 10 is hidden through the mounting hole 11.

[0024] like Figure 2As shown, the nut 18 is arranged on the connecting rod 8, and the diameter of the connecting rod 8 is smaller than the diameter of the guide column 5 to form a stepped shaft to avoid contact between the nut 18 and the first guide hole 6. In this embodiment, the connecting rod 8 is provided with an external thread corresponding to the nut 18, so as to facilitate axial adjustment by rotating the nut 18.

[0025] A groove 7 is concavely arranged on the bottom surface of the pulling plate 2 and is located above the nut 18. A second guide hole 16 corresponding to the connecting rod 8 and extending to the top surface of the pulling plate 2 is arranged on the top of the groove 7 to guide the lifting and lowering of the pulling plate 2.

[0026] The nut 18 is provided with a limit sleeve 17 extending upward into the groove 7, and the gap between the top of the limit sleeve 17 and the top of the groove 7 is the distance that the drawing plate 2 is allowed to move downward relative to the fixed plate 1. The nut 18 and the limit sleeve 17 adopt an integrated steel structure, and the gap between the top of the limit sleeve 17 and the top of the groove 7 is changed by rotating the nut 18, so as to adjust the distance that the drawing plate 2 moves downward relative to the fixed plate 1 after the mold is opened.

[0027] The spring 15 is arranged in the limiting sleeve 17, and the top of the spring 15 extends upward to the top surface of the groove 7. The spring 1 is used to elastically support the drawing plate 2, so as to keep the drawing plate 2 and the fixing plate 1 in the initial stage of mold opening. In this embodiment, the spring 15 is concentric with the connecting rod 8, so that the spring 15 is sleeved on the connecting rod 8, and the stability during the expansion and contraction process is high.

[0028] When opening the mold, the fixed plate 1 drives the pulling plate 2 to move upward, first maintaining the contact between the movable mold plate 3 and the fixed mold to extend the cooling time, and utilizing the relative movement between the movable mold plate 3 and the pulling plate 2 to realize the separation of the material head in the pulling plate 2 and the plastic part under the movable mold plate 3, and then utilizing the pull rod 4 to pull the pulling plate 2 downward, the spring 15 is compressed, and the pulling plate 2 moves downward relative to the fixed plate 1 to separate the material head from the gate. The distance between the limit sleeve 17 and the top surface of the groove can also be adjusted by rotating the nut 18 to change the downward movement distance of the pulling plate 2 relative to the fixed plate 1 to ensure the complete separation of the material head from the gate.

[0029] In summary, the utility model discloses a movable mold assembly for injection molding, which realizes the separation of the sprue and the plastic part as well as the sprue and the gate during the mold opening process, and is convenient for adjustment.

[0030] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A movable mold assembly for injection molding, characterized in that: include: A fixed plate, a pulling plate, a nut, a spring, a pulling rod and a movable template, wherein the pulling plate is arranged below the fixed plate, the movable template is arranged below the pulling plate, the pulling rod is arranged on both sides of the pulling plate, and the bottom of the pulling rod extends downward to both sides of the movable template, a first guide hole is symmetrically arranged in the movable template, a guide column is arranged in the first guide hole, a connecting rod is arranged on the top of the guide column, which passes through the pulling plate upward and extends to the fixed plate, the nut is arranged on the connecting rod, a groove is concavely arranged on the bottom surface of the pulling plate and is located above the nut, a limiting sleeve is arranged on the nut and extends upward into the groove, the spring is arranged in the limiting sleeve, and the top of the spring extends upward to the top surface of the groove.

2. The movable mold assembly for injection molding according to claim 1, characterized in that: The pull rod is provided with a first screw connected with the pulling plate.

3. The movable mold assembly for injection molding according to claim 1, characterized in that: The pull rod is provided with a vertically extending waist hole, and a second screw connected with the movable template is provided in the waist hole.

4. The movable mold assembly for injection molding according to claim 1, characterized in that: The diameter of the connecting rod is smaller than the diameter of the guide column to form a stepped shaft.

5. The movable mold assembly for injection molding according to claim 1, characterized in that: The bottom of the fixing plate is provided with a socket corresponding to the connecting rod, the top of the fixing plate is provided with a mounting hole connected with the socket, and the mounting hole is provided with a third screw connected with the connecting rod.

6. The movable mold assembly for injection molding according to claim 5, characterized in that: The diameter of the mounting hole is larger than the diameter of the insertion hole to form a stepped hole.

7. The movable mold assembly for injection molding according to claim 1, characterized in that: The connecting rod is provided with an external thread corresponding to the nut.

8. The movable mold assembly for injection molding according to claim 1, characterized in that: The top of the groove is provided with a second guide hole corresponding to the connecting rod and extending to the top surface of the pulling plate.

9. The movable mold assembly for injection molding according to claim 1, characterized in that: The spring is concentric with the connecting rod.

10. The movable mold assembly for injection molding according to claim 1, characterized in that: The nut and the limiting sleeve adopt an integrated steel structure.

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