Injection mold capable of automatically cutting water gap in mold

Abstract

The utility model discloses an in-mold automatic water gap cutting injection mold which comprises an upper mold and a lower mold, the opposite surfaces of the upper mold and the lower mold are respectively provided with an upper mold cavity and a lower mold cavity, the upper mold cavity and the lower mold cavity jointly form an injection mold cavity, the middle part of the upper mold is provided with a fixed tool apron, and the middle part of the lower mold is provided with a movable tool apron corresponding to the fixed tool apron. A cutter is arranged on the side portion of the movable cutter holder, an inserting piece is arranged on the fixed cutter holder, an inserting hole is formed in the movable cutter holder, and after the upper die and the lower die are assembled, the inserting piece of the fixed cutter holder can be inserted into the inserting hole of the movable cutter holder. According to the in-mold automatic water gap cutting injection mold disclosed by the utility model, during injection molding, the upper mold and the lower mold are closed, the plug connector can be inserted into the plug hole, and when the injection molding is completed and the mold is opened, the upper mold drives the fixed tool apron to move, the fixed tool apron drives the movable tool apron to move through the plug connector, and the water gap can be cut off during displacement, so that the water gap can be automatically cut off in the mold; therefore, the water gap cutting efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with automatic water inlet cutting. Background Art

[0002] Nowadays, most plastics are made by injection molding. During the injection molding process, a glue inlet needs to be opened on the mold. The glue inlet is connected to the mold cavity and is used to inject molten plastic material into the mold cavity. The molten plastic material enters the mold cavity to form a product. In order to ensure the efficiency of injection molding and save production costs, multiple cavities are generally designed on the injection mold. This makes the injection molded product have a sprue after the injection molding is completed. In order to get the product, the sprue needs to be cut off.

[0003] In the prior art, when performing nozzle cutting, the nozzle is usually trimmed manually or by a robot. If manual trimming is used, the labor intensity is high, the trimming is inconsistent, the cut surface is uneven, or the product is accidentally damaged during trimming, which easily increases the defective rate and affects work efficiency. If a robot is used, the cost and maintenance fee are high, and there are safety hazards. Workers need to be educated on safety knowledge and operating procedures, which increases management costs. Utility Model Content

[0004] The utility model aims to provide an in-mold automatic water-cutting injection mold which can improve efficiency and reduce cost.

[0005] In order to solve the above technical problems, the present invention can be implemented by adopting the following technical solutions:

[0006] An in-mold automatic water gate cutting injection mold comprises an upper mold and a lower mold, and the upper mold cavity and the lower mold cavity are respectively provided on the opposite surfaces of the upper mold and the lower mold, and the upper mold cavity and the lower mold cavity together form an injection mold cavity, a fixed knife seat is provided in the middle of the upper mold, a movable knife seat corresponding to the fixed knife seat is provided in the middle of the lower mold, and a cutting knife is arranged on the side of the movable knife seat, a plug-in piece is provided on the fixed knife seat, and a plug-in hole is opened on the movable knife seat. When the upper mold and the lower mold are closed, the plug-in piece of the fixed knife seat will be inserted into the plug-in hole of the movable knife seat.

[0007] In one embodiment, the side of the movable knife seat is provided with a mortise and tenon groove, and the cutter is provided with a mortise and tenon protrusion. The mortise and tenon protrusion is inserted into the mortise and tenon groove to connect the cutter to the movable knife seat, and after the connection, a fixing pin is inserted.

[0008] In one embodiment, the fixed tool holder is provided with an upper water inlet groove and a runner, and the movable tool holder is provided with a lower water inlet groove. The upper water inlet groove and the lower water inlet groove together form a water cavity, and the water cavity is respectively connected to the runner and the injection mold cavity.

[0009] In one embodiment, the upper mold includes an upper mold base, an upper mold plate and an upper mold core. The upper mold plate is connected to the upper mold base, the upper mold core is embedded in the upper mold plate, and the upper mold cavity is arranged in the upper mold core. The fixed knife seat passes through the upper mold core and the upper mold plate is connected to the upper mold base.

[0010] In one of the embodiments, the upper mold base is provided with a gate connected to the runner.

[0011] In one embodiment, the lower mold includes a lower mold base, a lower mold plate and a lower mold core, the lower mold plate is connected to the lower mold base, the lower mold core is embedded in the lower mold plate, the lower mold cavity is arranged in the lower mold core, and the movable knife seat is connected to the lower mold core.

[0012] In one of the embodiments, the lower mold core is provided with a first limiting step, and the movable knife seat is provided with a second limiting step, and the movable knife seat is connected to the lower mold core through the first limiting step and the second limiting step.

[0013] In one embodiment, a movable gap is formed between the first limiting step and the second limiting step.

[0014] In one of the embodiments, the lower mold further includes a top plate, and a plurality of ejector pins are arranged on the top plate, and ends of the plurality of ejector pins are respectively placed in the injection mold cavity and the water cavity.

[0015] In one embodiment, the connector is made of plastic. Beneficial Effects

[0016] The utility model discloses an automatic in-mold water nozzle cutting injection mold, a fixed knife seat is arranged in the middle of the upper mold, and a movable knife seat corresponding to the fixed knife seat is arranged in the middle of the lower mold. During injection molding, the upper mold and the lower mold are molded together, and the connector of the fixed knife seat is inserted into the connector hole of the movable knife seat. When the injection molding is completed and the mold is opened, the upper mold moves with the fixed knife seat. During the movement, the fixed knife seat will move the movable knife seat with a set distance through the connector. When the movable knife seat is moved, the water nozzle will be cut off, and the upper mold will continue to move with the fixed knife seat and separate from the movable knife seat until the mold is opened. Finally, the movable knife seat is used to cut off the water nozzle when the mold is opened, so that automatic water nozzle cutting can be realized in the mold without manual cutting, thereby improving the water nozzle cutting efficiency and reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of an automatic in-mold water-cutting injection mold of the utility model;

[0018] Figure 2 It is a cross-sectional view of the automatic water inlet cutting injection mold of the utility model;

[0019] Figure 3It is a schematic diagram of the upper mold structure of the automatic water-cutting injection mold in the mold of the utility model;

[0020] Figure 4 This is a schematic diagram of the lower mold structure of the automatic water inlet cutting injection mold of the utility model;

[0021] Figure 5 The utility model is a schematic diagram of the installation of the cutter and the movable knife seat of the in-mold automatic water inlet cutting injection mold.

[0022] As shown in the attached figure:

[0023] 100, upper mold; 110, upper mold base; 111, gate; 120, upper mold plate; 130, upper mold core; 140, upper mold cavity;

[0024] 200, lower die; 210, lower die seat; 220, lower die plate; 230, lower die core; 231, first limiting step; 240, lower die cavity; 250, ejector plate; 251, ejector pin;

[0025] 300, fixed knife seat; 310, connector; 320, upper water inlet groove; 330, pouring channel;

[0026] 400, movable knife seat; 410, plug hole; 420, drain slot; 430, mortise and tenon slot; 440, second limit step;

[0027] 500, cutting knife; 510, mortise and tenon protrusion; 520, fixing pin;

[0028] 600, Activity spacing. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only."

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] See also Figures 1 to 4 , an in-mold automatic water gate cutting injection mold, including an upper mold 100 and a lower mold 200, and the upper mold cavity 140 and the lower mold cavity 240 are respectively provided on the opposite surfaces of the upper mold 100 and the lower mold 200, and the upper mold cavity 140 and the lower mold cavity 240 together form an injection mold cavity, a fixed knife seat 300 is provided in the middle of the upper mold 100, and a movable knife seat 400 corresponding to the fixed knife seat 300 is provided in the middle of the lower mold 400, and a cutter 500 is arranged on the side of the movable knife seat 400, a plug-in component 310 is provided on the fixed knife seat 300, and a plug-in hole 410 is opened on the movable knife seat 400. When the upper mold 100 and the lower mold 200 are molded together, the plug-in component 310 of the fixed knife seat 300 will be inserted into the plug-in hole 410 of the movable knife seat 400.

[0033] Specifically, in this embodiment, a fixed knife seat 300 is provided in the middle of the upper mold 100, and a movable knife seat 400 is provided in the middle of the lower mold 200, and a cutter 500 is provided on the side of the movable knife seat 400, and a plug-in piece 310 is provided on the fixed knife seat 300, and a plug-in hole 410 is provided on the movable knife seat 400. When the product is injection-molded, the upper mold 100 and the lower mold 200 are molded together. When the molds are closed, the plug-in piece 310 on the fixed knife seat 300 is inserted into the plug-in hole 410 of the movable knife seat 400. When the product is injection-molded, the upper mold 100 and the lower mold 200 are opened. During the mold opening process, the upper mold 100 drives the fixed knife seat 300 to move, and the fixed knife seat 300 is opened. 0 will move the movable knife holder 400 to the set position through the connector 310. During the movement, the movable knife holder 400 will move with the cutter 500, and the cutter 500 will cut off the sprue first when it moves. The upper mold 100 and the lower mold 200 will continue to open the mold, and the connector 310 of the fixed knife holder 300 will be separated from the plug hole 410 of the movable knife holder 400, so that the movable knife holder 400 will no longer move. The upper mold 100 and the lower mold 200 will complete the mold opening action. Finally, the movable knife holder 400 and the cutter 500 will be used to cut the sprue when opening the mold, so that the automatic sprue cutting can be realized in the mold without manual cutting, thereby improving the sprue cutting efficiency and reducing costs.

[0034] In order to ensure that the connector 310 can move with the movable knife holder 400 after being inserted into the plug hole 410, the connector 310 in this embodiment is made of plastic material, and the diameter of the connector 310 is larger than the inner diameter of the plug hole 410. When the mold is closed, the connector 310 is inserted into the plug hole 410, and the friction force is enhanced by the elasticity of the plastic material, thereby ensuring that the connector 310 can move with the movable knife holder 400.

[0035] Also, see Figure 5 In order to realize the installation between the cutter 500 and the movable knife seat 400, a mortise and tenon groove 430 is provided on the side of the movable knife seat 400, and the cutter 500 is provided with a mortise and tenon protrusion 510. During assembly, the mortise and tenon protrusion 510 on one side of the cutter 500 is inserted into the mortise and tenon groove 430 on the side of the movable knife seat 400, so that the cutter 500 and the movable knife seat 400 form a mortise and tenon connection. After the cutter 500 and the movable knife seat 400 are connected, the fixing pin 520 is inserted horizontally, and the cutter 500 and the movable knife seat 400 are fixed by the fixing pin 520. When the cutter 500 needs to be replaced, the fixing pin 520 only needs to be taken out to replace the cutter 500, so that the assembly between the cutter 500 and the movable knife seat 400 is simple and convenient for disassembly and assembly.

[0036] See also Figures 2 to 4 In order to realize the injection molding of the product, the present embodiment is provided with a runner 330 and an upper water inlet groove 320 on the fixed knife seat 300, and a lower water inlet groove 420 is provided on the movable knife seat 400. The upper water inlet groove 320 and the lower water inlet groove 420 together form a water cavity, and the water cavity is respectively connected with the runner 330 and the injection mold cavity, and the upper mold 100 includes an upper mold seat 110, an upper mold plate 120 and an upper mold core 130, the upper mold plate 120 is connected to the upper mold seat 110, the upper mold core 130 is embedded in the upper mold plate 120, and the upper mold cavity 140 is provided in the upper mold core 130, and the fixed knife seat 300 passes through the upper mold core 130 and The upper mold plate 120 is connected to the upper mold base 110, and a gate 111 connected to the runner 330 is provided on the upper mold base 110. The lower mold 200 includes a lower mold base 210, a lower mold plate 220 and a lower mold core 230. The lower mold plate 220 is connected to the lower mold base 210, the lower mold core 230 is embedded in the lower mold plate 220, and the lower mold cavity 240 is provided in the lower mold core 230. The movable knife seat 400 is connected to the lower mold core 230. During injection molding, the molten material is injected through the gate 111 of the upper mold base 110, and through the runner 330 to the water mouth cavity, and then from the water mouth cavity to the injection mold cavity, thereby forming a molding injection of the product.

[0037] See also Figure 2When the nozzle is cut, the connector 310 of the fixed knife seat 300 will be inserted into the plug hole 410 of the movable knife seat 400, and the movable knife seat 400 will be moved by the connector 310 to achieve nozzle cutting. In order to prevent the fixed knife seat 300 from completely taking out the movable knife seat 400 through the connector 310, it is necessary to limit the movable knife seat 400. Therefore, the lower mold core 230 is provided with a first limiting step 231, and the movable knife seat 400 is provided with a second limiting step 440. The movable knife seat 400 is moved by the connector 310. The first limiting step 231 and the second limiting step 440 are limitedly connected to the lower mold core 230, and a movable spacing 600 is formed between the first limiting step 231 and the second limiting step 440. The limiting of the first limiting step 231 and the second limiting step 440 can prevent the fixed tool holder 300 from completely bringing out the movable tool holder 400 when the mold is opened, and the movable spacing 600 can make the movable tool holder 400 separate from the fixed tool holder 300 after moving a set distance, thereby realizing the in-mold cutting of the water outlet and the mold opening action.

[0038] Finally, in order to facilitate the removal of the molded product in the injection mold cavity and the sprue in the sprue mouth cavity from the mold, the lower mold in this embodiment also includes a top plate 250, and a plurality of ejector pins 251 are arranged on the top plate 250, and the ends of the plurality of ejector pins 251 are respectively placed in the injection mold cavity and the sprue mouth cavity. After the mold is opened, the molded product and the sprue in the injection mold cavity and the sprue mouth cavity can be directly ejected by the ejector pins 251, thereby facilitating product discharge.

[0039] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Any technician in the industry can smoothly implement the utility model according to the drawings shown in the specification and the above description; however, any equivalent changes, modifications and evolutions made by any technician familiar with the profession without departing from the scope of the technical solution of the utility model using the technical content disclosed above are all equivalent embodiments of the utility model; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the utility model are still within the scope of protection of the technical solution of the utility model.

Claims

1. An in-mold automatic water gate cutting injection mold, characterized in that: The upper mold and the lower mold are respectively provided with an upper mold cavity and a lower mold cavity on the opposite surfaces of the upper mold and the lower mold, and the upper mold cavity and the lower mold cavity together form an injection mold cavity; A fixed knife seat is provided in the middle of the upper die, a movable knife seat corresponding to the fixed knife seat is provided in the middle of the lower die, and a cutting knife is provided on the side of the movable knife seat; The fixed knife seat is provided with a plug-in piece, and the movable knife seat is provided with a plug-in hole. When the upper mold and the lower mold are closed, the plug-in piece of the fixed knife seat will be inserted into the plug-in hole of the movable knife seat.

2. The automatic in-mold water gate injection mold according to claim 1, characterized in that: The side of the movable knife seat is provided with a mortise and tenon groove, and the cutter is provided with a mortise and tenon protrusion. The mortise and tenon protrusion is inserted into the mortise and tenon groove to connect the cutter and the movable knife seat. After the connection, a fixing pin is inserted.

3. The automatic in-mold water gate injection mold according to claim 1, characterized in that: The fixed knife seat is provided with an upper water inlet groove and a runner, and the movable knife seat is provided with a lower water inlet groove. The upper water inlet groove and the lower water inlet groove together form a water cavity, which is respectively connected with the runner and the injection mold cavity.

4. The automatic in-mold water gate injection mold according to claim 1, characterized in that: The upper die comprises an upper die seat, an upper die plate and an upper die core, the upper die plate is connected to the upper die seat, the upper die core is embedded in the upper die plate, and the upper die cavity is arranged in the upper die core, and the fixed knife seat passes through the upper die core and the upper die plate and is connected to the upper die seat.

5. The automatic in-mold water gate injection mold according to claim 4, characterized in that: The upper mold base is provided with a gate communicated with the runner.

6. The in-mold automatic water gate cutting injection mold according to claim 1, characterized in that: The lower die comprises a lower die base, a lower die plate and a lower die core. The lower die plate is connected to the lower die base, the lower die core is embedded in the lower die plate, the lower die cavity is arranged in the lower die core, and the movable knife seat is connected to the lower die core.

7. The in-mold automatic water gate cutting injection mold according to claim 6, characterized in that: The lower die core is provided with a first limiting step, and the movable knife seat is provided with a second limiting step. The movable knife seat is connected to the lower die core in a limiting manner via the first limiting step and the second limiting step.

8. The in-mold automatic water gate cutting injection mold according to claim 7, characterized in that: A movable gap is formed between the first limiting step and the second limiting step.

9. The automatic in-mold water gate cutting injection mold according to claim 3, characterized in that: The lower mold also includes a top plate, and a plurality of ejector pins are arranged on the top plate, and the ends of the plurality of ejector pins are respectively placed in the injection mold cavity and the water cavity.

10. The in-mold automatic water gate cutting injection mold according to claim 1, characterized in that: The plug connector is made of plastic material.

Images