In-mold tangent runner and runner rod ejection structure and ejection method

Abstract

The invention discloses an in-mold tangent runner and runner rod ejection structure and an ejection method, and belongs to the technical field of injection molds. The mold comprises a cutting and ejecting integrated assembly, a press plate, an insert fixing block compound plate and an insert fixing block, wherein the press plate, the insert fixing block compound plate and the insert fixing block are sequentially arranged from bottom to top; the cutting and ejecting integrated assembly comprises a cutter and an ejecting oil cylinder, the bottom of the cutter is connected with the output end of the ejecting oil cylinder, and the upper end of the cutter penetrates through the insert fixing block and the insert. Based on the integrated structural design of the cutting-off and ejection integrated assembly, cutting-off of the pouring gate and ejection of the pouring gate can be achieved through two times of ejection, and due to the integrated structural design, on one hand, the mold space is saved, and the processes of designing, machining, assembling and the like of the mold and equipment corresponding to the mold are simplified; and on the other hand, the action process of the mold is reduced, the automatic production process is simplified, the time period of mold injection molding is shortened, and the production efficiency is effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of injection molds, and in particular relates to an in-mold cut runner and runner rod ejection structure and an ejection method. Background Art

[0002] During the process of pipe injection molding, it is necessary to remove the gates and runners formed by injection molding on the product. Manual removal is easy to damage the product structure itself, and the removal effect is poor and the removal efficiency is low; there are also structural designs for removing the gates and ejector runners separately inside the mold, but the independent functional module design increases the overall space usage of the mold and increases the setting of the power output device, which brings inconvenience to processing, assembly, subsequent use, and maintenance. Summary of the invention

[0003] In view of the above-mentioned problems existing in the prior art, the object of the present invention is to provide an in-mold cut runner and runner rod ejection structure and ejection method, which is based on the integrated structural design of the cutting and ejecting integrated components, and can respectively realize the cutting of the gate and the ejection of the runner through a two-stage ejection action setting.

[0004] The present invention provides the following technical solutions: an in-mold runner cutting and runner rod ejection structure, comprising a cutting and ejecting integrated component and a press plate, an insert fixing block double plate, and an insert fixing block arranged in sequence from bottom to top, and an insert is arranged on the insert fixing block; the cutting and ejecting integrated component comprises an upper cutter and a lower ejection cylinder, the bottom of the cutter is connected to the output end of the ejection cylinder, and the upper end passes through the insert fixing block and the insert arrangement, and can be moved up in two stages under the drive of the ejection cylinder to respectively realize the cutting of the product gate and the ejection of the runner.

[0005] Furthermore, the integrated cutting and ejecting assembly comprises a cutter fixing plate and a cutter reclosing plate, the cutter is fixed on the cutter fixing plate, the cutter fixing plate is fixed on the cutter reclosing plate, and the output end of the ejecting oil cylinder is connected to the cutter reclosing plate.

[0006] Furthermore, the cutter fixing plate is provided with a limit rod for preventing the cutter from contacting the fixed mold, a push rod for ejecting the runner, and a guide pin.

[0007] Furthermore, the insert fixing block and the insert fixing block double plate are respectively provided with a sinking groove structure for facilitating the placement of the cutter fixing plate and the cutter double plate.

[0008] Furthermore, the insert fixing block is provided with a through hole for the cutter and the limit rod to pass through; the insert fixing block is provided with a guide hole matching with the guide pin; the insert fixing block and the insert are both provided with a through hole for the push rod to pass through.

[0009] The invention discloses an ejection method of an in-mold cut runner and runner rod ejection structure. Based on the ejection structure of a cutting and ejecting integrated component, a gate is cut in the mold through a first-level ejection, and after the mold is opened, the runner is ejected out of the mold through a second-level ejection.

[0010] Further, the specific steps of the ejection method are as follows:

[0011] S1. The ejection cylinder is started, and the cutter is driven upward through the cutter plate and the cutter fixing plate to cut off the gate;

[0012] S2. After the cutting is completed, when the cutter moves upward, the limit rod contacts the fixed die. At this time, the oil cylinder is closed to prevent the cutter from colliding with the fixed die.

[0013] S3, the mold is opened. After the mold is opened, the ejector cylinder is started again, and the ejector rod is driven to move through the cutter plate and the cutter fixing plate to eject the runner.

[0014] By adopting the above technology, compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] The present invention is based on an integrated structural design of a cutting and ejecting integrated component, and can realize the cutting of the gate and the ejection of the runner respectively through two jackings. Its integrated structural design, on the one hand, saves mold space and simplifies the design, processing, assembly and other processes of the mold and the corresponding equipment of the mold; on the other hand, it reduces the movement process of the mold, simplifies the automated production process, shortens the time cycle of mold injection, and effectively improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an exploded schematic diagram of the overall structure of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the cutting and ejecting integrated component of the present invention;

[0018] Figure 3 3a is a schematic diagram of the structure of the insert fixing block of the present invention; wherein 3a is a schematic diagram of the front structure, and 3b is a schematic diagram of the back structure;

[0019] Figure 4 4a is a schematic diagram of the structure of the insert fixing block doubler of the present invention; wherein 4a is a schematic diagram of the front structure, and 4b is a schematic diagram of the back structure. DETAILED DESCRIPTION

[0020] 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 of the specification. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0021] On the contrary, the present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the detailed description of the present invention below. Those skilled in the art can fully understand the present invention without the description of these details.

[0022] See also Figure 1-4 An in-mold cutting runner and runner rod ejection structure includes a cutting and ejection integrated component A, an insert 1, an insert fixing block 3, an insert fixing block composite plate 4 and a press plate 5.

[0023] Specifically, the press plate 5 is fixedly mounted on the mold equipment by bolts, the insert fixing block double plate 4 is fixedly mounted on the press plate 5 by bolts, and a plurality of double plate sink grooves 401 are opened on the upper part of the insert fixing block double plate 4.

[0024] The insert fixing block 3 is fixedly mounted on the insert fixing block double plate 4 by bolts, and a plurality of fixing block sink grooves 301 are provided at the bottom of the insert fixing block 3, and the fixing block sink grooves 301 are arranged one by one with the double plate sink grooves 401, and are combined to form a space for placing the cutting and ejecting integrated component A. An installation sink groove is provided at the upper part of the insert fixing block 3, and the insert 1 is installed in the installation sink groove.

[0025] The upper part of the insert 1 is the fixed mold structure of the mold (which is a conventional structure and is not the technical point of the present embodiment, and is not specifically described in this embodiment). The fixed mold is provided with a fixed mold insert that matches the insert 1, and the combination forms a molding structure of the product 2. In this embodiment, the number of molded products 2 on the insert 1 is two.

[0026] Specifically, there are three groups of integrated cutting and ejection components A, which are respectively arranged on both sides of two products and between two products 2, and are used to cut off the gate on the product 2 and eject the runner.

[0027] The cutting and ejection integrated assembly A comprises a cutter plate 11, on the upper end surface of which a cutter fixing plate 10 is fixedly mounted, and on the lower end surface of which two ejection oil cylinders 12 are arranged, and the ejection oil cylinders 12 are controlled by an external oil cylinder controller to drive the cutter plate 11 and the cutter fixing plate 10 to move up and down. An oil nozzle 6 is arranged on the press plate 5, and the oil nozzle 6 is connected to the external controller and communicated with the ejection oil cylinder 12 through a pipeline.

[0028] The cutter reattachment plate 11 and the cutter fixing plate 10 are provided with guide pins 9 , a cutter 15 , a limit rod 14 , a push rod 16 and a spring 13 .

[0029] The cutter 15 is used to cut off the gate on the product when the ejection cylinder 12 is lifted for the first time. The cutter 15 includes a rod body and a cutter head at the end, and the cutter head corresponds to the position of the gate to be cut. The number of cutters 15 in the two-side cutting and ejection integrated component A is one, and the number of cutters 15 in the middle cutting and ejection integrated component A is two.

[0030] There are two limit rods 14 , which are used to contact the fixed mold during the lifting process of the cutting and ejecting integrated component A, so that the surface cutter 15 collides with the fixed mold and damages the cutter 15 .

[0031] The ejector rod 16 is used to lift the runner as a whole and separate it from the mold when the ejector cylinder 12 is lifted for the second time.

[0032] Specifically, the insert fixing block 3 is provided with a through hole for the cutter 15 and the limit rod 14 to pass through; the insert fixing block 3 is provided with a guide hole that cooperates with the guide pin 9; the insert fixing block 3 and the insert 1 are both provided with a through hole for the push rod 16 to pass through.

[0033] This embodiment is based on the ejection structure of the integrated cutting and ejecting component A, which cuts off the gate in the mold through a first-level ejection, and after the mold is opened, the runner is ejected out of the mold through a second-level ejection.

[0034] The specific working steps are as follows:

[0035] S1. The controller controls the ejection cylinder 12 to move. The output end of the ejection cylinder 12 drives the cutter plate 11 and the cutter fixing plate 10 to move upward, thereby driving the cutter 15 to move upward to cut off the gate on the product 2.

[0036] S2. During the process of gate cutting, the cutter 15 moves up to the limit rod 14 and contacts the fixed mold. At this time, the cylinder 12 is closed to prevent the cutter 15 from colliding with the fixed mold; and the spring 13 contacts the groove wall of the fixed block groove 301 to avoid rigid contact between the components.

[0037] S3, the mold is opened. After the mold is opened, the controller controls the ejection cylinder 12 to start again, and the ejector rod 16 is driven to move through the cutter plate 11 and the cutter fixing plate 10 to eject the runner.

[0038] 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 principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mold-cut runner and runner rod ejection structure, characterized in that: The invention comprises a cutting and ejecting integrated component (A) and a press plate (5), an insert fixing block double plate (4), and an insert fixing block (3) which are arranged in sequence from bottom to top, and an insert (1) is arranged on the insert fixing block (3); the cutting and ejecting integrated component (A) comprises an upper cutter (15) and a lower ejecting cylinder (12); the bottom of the cutter (15) is connected to the output end of the ejecting cylinder (12), and the upper end is arranged through the insert fixing block (3) and the insert (1); the cutter (15) can be moved upward in two stages under the drive of the ejecting cylinder (12), so as to respectively realize the cutting of the product gate and the ejection of the runner.

2. The in-mold cut runner and runner rod ejection structure according to claim 1, characterized in that: The cutting and ejecting integrated component (A) comprises a cutter fixing plate (10) and a cutter reclosing plate (11), the cutter (15) is fixed on the cutter fixing plate (10), the cutter fixing plate (10) is fixed on the cutter reclosing plate (11), and the output end of the ejecting oil cylinder (12) is connected to the cutter reclosing plate (11).

3. The in-mold cut runner and runner rod ejection structure according to claim 2, characterized in that: The cutter fixing plate (10) is provided with a limit rod (14) for preventing the cutter (15) from contacting the fixed mold, a push rod (16) for ejecting the runner, and a guide pin (9).

4. The in-mold cut runner and runner rod ejection structure according to claim 3, characterized in that: The insert fixing block (3) and the insert fixing block backing plate (4) are respectively provided with a sink structure for facilitating the placement of the cutter fixing plate (10) and the cutter backing plate (11).

5. The in-mold cut runner and runner rod ejection structure according to claim 4, characterized in that: The insert fixing block (3) is provided with a through hole for the cutter (15) and the limit rod (14) to pass through; the insert fixing block (3) is provided with a guide hole that matches the guide pin (9); and the insert fixing block (3) and the insert (1) are both provided with a through hole for the push rod (16) to pass through.

6. The method for ejecting an in-mold cut runner and a runner rod ejection structure according to claim 1, characterized in that: Based on the ejection structure of the cutting and ejection integrated component (A), the gate is cut off in the mold by the first-stage ejection, and after the mold is opened, the runner is ejected out of the mold by the second-stage ejection.

7. The method for ejecting the in-mold cut runner and runner rod ejection structure according to claim 6, characterized in that: The specific steps of the ejection method are as follows: S1, the ejection oil cylinder (12) is started, and the cutter (15) is driven to move upwards via the cutter plate (11) and the cutter fixing plate (10) to cut off the gate; S2, after the cutting is completed, during the upward movement of the cutter (15), the limit rod (14) contacts the fixed die, and at this time, the oil cylinder (12) is closed to prevent the cutter (15) from colliding with the fixed die; S3, the mold is opened. After the mold opening is completed, the ejector oil cylinder (12) is started again, and the ejector rod (16) is driven to move through the cutter plate (11) and the cutter fixing plate (10) to eject the runner.

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