Automatic water gap cutting mold

Abstract

The utility model belongs to the technical field of injection molds, and discloses an automatic water gap cutting mold. The mold comprises a first mold, a second mold and a cutter, the first mold is provided with a slide way, one of the first mold and the second mold is provided with a glue inlet, and the glue inlet is communicated with the slide way; the cutter is slidably arranged in the sliding way in a limited mode, a runner used for forming a water gap is formed in the cutter, a product cavity is formed in the first mold and communicates with the runner through the inner wall of the sliding way, and after the first mold is opened and the cutter slides, the runner and the product cavity can be arranged in a relatively staggered mode. And the cutter can stably and accurately cut and separate the water gap from the product along the joint, so that the cutting precision of the water gap is further improved. Besides, when the cutter moves downwards, the side cutting surface of the cutter can continuously grind the cutting surface of the product so as to ensure that no water gap is left on the cutting surface of the product, so that the water gap cutting effect is better, the cutting surface of the product is smoother, and the production quality of the product is higher.

Description

Technical Field

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

[0002] The mold is an indispensable and important tool in the injection molding process. Injection molding is the process of injecting hot melt plastic into a mold cavity with the desired shape through the sprue. This injection method will cause the injected product to be connected to the sprue and cannot be automatically disconnected and separated. The manual removal of the sprue is required, which is not only labor-intensive and time-consuming, but also inefficient. In addition, a certain proportion of products will be defective, and the quality uniformity cannot be guaranteed.

[0003] To address the aforementioned issues, existing technologies offer an automatic nozzle cutting mold, comprising an upper mold, a lower mold, a product ejector, and a cutter. After the product is formed within the mold cavity, the ejector extends from the mold cavity, allowing the product to be ejected by the ejector. At this point, the cutter located on the nozzle cuts off the nozzle, eliminating the need for manual removal after demolding. This improves efficiency and yields a higher product yield. However, during the process of the ejector extending from the mold cavity, the ejector cannot accurately eject the product in a straight line, preventing the cutter from precisely separating the product and nozzle at their junction, thus still impacting the overall product quality. Utility Model Content

[0004] The purpose of the utility model is to provide an automatic water nozzle cutting mold, which can further improve the cutting accuracy of the product water nozzle, thereby further improving the production quality of the product.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] An automatic water nozzle cutting mold includes a first mold, a second mold and a cutting knife, wherein:

[0007] A slideway is formed on the first mold, and one of the first mold and the second mold has a glue inlet, and the glue inlet is connected to the slideway;

[0008] The cutter is slidably limited and disposed in the slideway, and a flow channel for forming a nozzle is provided on the cutter. A product cavity is provided on the first mold, and the product cavity is connected to the flow channel through the inner wall of the slideway.

[0009] When the first mold is opened and the cutter slides, the flow channel and the product cavity can be relatively staggered so that the nozzle and the product are cut and separated.

[0010] Preferably, the automatic watertightness cutting mold includes a first direction and a second direction perpendicular to each other;

[0011] The product cavity is formed on the die-matching surface of the first mold in a depression along the first direction, the flow channel is formed on the blade surface of the cutter in a depression along the first direction, and the slideway is extended along the second direction.

[0012] Preferably, a draft opening is formed on the interface between the product cavity and the slideway, and a plane where the draft opening is located forms an acute angle with the bottom surface of the slideway.

[0013] Preferably, the automatic watertightness cutting mold further comprises a product ejector pin, which is arranged relative to the product cavity and can extend from the product cavity to eject the product.

[0014] Preferably, the automatic nozzle cutting mold further includes a nozzle ejector pin, which is arranged relative to the flow channel and can be extended in the flow channel to eject the nozzle.

[0015] Preferably, the automatic sprue cutting mold further comprises a top plate, which is transmission-connected to the product ejector and the sprue ejector, and can control the product ejector to extend into the product cavity, and control the sprue ejector to extend into the runner.

[0016] Preferably, the cutter has a stepped structure and includes a cutter body and a limit block. The cutter body can be slidably arranged in the slide and is provided with the flow channel. A limit step surface is formed between the cutter body and the limit block. The limit step surface is set to have a preset distance from the first mold. When the limit step surface is in contact with the first mold, the cutter body can move to a set position in the slide.

[0017] Preferably, the second direction is parallel to the vertical direction, so that the slide is extended along the vertical direction, and a discharge port connected to the outside is provided at the bottom of the slide.

[0018] Preferably, a plurality of the product cavities are arranged around the slide, and each of the product cavities is connected to the slide via a flow channel.

[0019] Preferably, the flow channel includes a converging channel and a branching flow channel, the converging channel is connected to the glue inlet and a plurality of the branching flow channels, and the branching flow channels are connected to the product cavity in a one-to-one correspondence.

[0020] Beneficial effects of the utility model:

[0021] This embodiment provides an automatic sprue cutting mold. When in use, after the first mold is opened, the cutter can move downward along a slide relative to the first mold. This allows the runner on the cutter to be vertically offset from the product cavity on the first mold. This allows the cutter to stably and accurately separate the sprue and product along the connection, further improving the precision of the product's sprue removal. Furthermore, as the cutter moves downward, its side cut surface continuously grinds the product's cut surface to ensure that no sprue residue remains on the product's cut surface. This results in better sprue removal, a smoother product cut surface, and higher product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of an automatic water-cutting die provided by an embodiment of the present utility model;

[0023] Figure 2 An exploded view of the automatic water nozzle mold provided by an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the assembly of the automatic watertightness mold provided by an embodiment of the present utility model, in which the runner and the product cavity are in a misaligned state;

[0025] Figure 4 A front view of a portion of the structure of the automatic water-cutting die provided by an embodiment of the present utility model;

[0026] Figure 5 A rear view of the automatic water-cutting die provided by an embodiment of the present utility model;

[0027] Figure 6 An exploded view of the cutter and the first mold in the automatic water nozzle cutting mold provided by an embodiment of the utility model;

[0028] Figure 7 A cross-sectional view of the assembled cutter and the first mold in the automatic water gate mold provided by an embodiment of the present utility model;

[0029] Figure 8 This is a schematic structural diagram of the first mold provided in an embodiment of the present utility model.

[0030] In the picture:

[0031] 100. Products;

[0032] 1. First mold; 101. Slideway; 1011. Second perforation; 1012. First channel; 1013. Second channel; 102. Product cavity; 1021. First perforation; 1022. Draft opening; 11. Mold base; 12. Mold core;

[0033] 2. Second mold; 21. Glue inlet;

[0034] 3. Cutter; 301. Cutter body; 302. Limit block; 303. Limit step surface; 31. Inlet; 32. Flow channel; 321. Converging channel; 322. Branching channel; 323. Third perforation;

[0035] 4. Driving parts;

[0036] 5. Product ejector;

[0037] 6. Nozzle ejector pin. DETAILED DESCRIPTION

[0038] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0039] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0041] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0042] The technical solution provided by the present invention is described below with reference to the accompanying drawings and specific embodiments.

[0043] Combine Figures 1 to 3 As shown, this embodiment provides an automatic water gate cutting mold that can be used on an injection molding machine, which mainly includes a first mold 1, a second mold 2, a cutter 3 and a driving member 4. Among them, a slide 101 is formed on the first mold 1, and one of the first mold 1 and the second mold 2 has a glue inlet 21. In this embodiment, the glue inlet 21 is opened through the second mold 2, and the glue inlet 21 is connected to the slide 101. The cutter 3 is slidably limited in the slide 101, and the cutter 3 is provided with a flow channel 32 for forming the water gate 31. The first mold 1 is provided with a product cavity 102, and the product cavity 102 is connected to the flow channel 32 through the inner wall of the above-mentioned slide 101. The driving member 4 is a prior art, and can adopt an oil cylinder or an air cylinder. The output end of the driving member 4 is transmission-connected to the cutter 3 to drive the cutter 3 to slide in the slide 101. One implementation of this embodiment is to set the first mold 1 as a dynamic mold and the second mold 2 as a static mold. After the first mold 1 is opened, the cutter 3 can relatively stagger the runner 32 and the product cavity 102 in space, so that the sprue 31 and the product 100 can be cut and separated.

[0044] It should be noted in advance that in the drawings of this application, the X-axis is set to represent the first direction and the Y-axis is set to represent the second direction. In this embodiment, the first mold 1 performs mold opening movement along the X-axis, the Y-axis corresponds to the vertical direction, and the mating surfaces of the first mold 1 and the second mold 2 are arranged vertically. One implementation of this embodiment is that the mating surface of the first mold 1 is recessed along the first direction to form a product cavity 102, the blade surface of the cutter 3 is recessed along the first direction to form a flow channel 32, and the slide 101 is extended along the second direction so that the slide 101 extends in the vertical direction.

[0045] When the above-mentioned automatic sprue cutting mold is in use, after the first mold 1 is separated from the second mold 2, the driving member 4 is started, and the cutter 3 moves downward along the slide 101 relative to the first mold 1 under the thrust of the driving member 4, so that the flow channel 32 on the cutter 3 can be offset in the vertical direction with the product cavity 102 on the first mold 1, so that the cutter 3 can stably and accurately cut and separate the sprue 31 and the product 100 along the connection, thereby further improving the cutting accuracy of the sprue 31 on the product 100. In addition, while the cutter 3 moves downward, the side section of the cutter 3 can also continuously grind the cut surface of the product 100 to ensure that there will be no sprue 31 residue on the cut surface of the product 100, thereby making the cutting effect of the sprue 31 better, the cut surface of the product 100 smoother, and the production quality of the product 100 higher.

[0046] Furthermore, in this embodiment, referring to Figure 3 A discharge port connected to the outside world is provided at the bottom of the slide 101. The debris of the nozzle 31 generated during the cutting process of the cutter 3 can fall freely onto the machine through the discharge port, thereby ensuring that the slide 101 is clean and tidy, preventing the debris of the nozzle 31 from accumulating in the slide 101 and affecting the normal operation of the cutter 3, thereby reducing the risk of failure.

[0047] The first mold 1 can be used for injection molding a plurality of products 100 at one time. Figure 3 On the first mold 1, two product cavities 102 are arranged at intervals on opposite sides of the slide 101. Each product cavity 102 is connected to the slide 101 through a flow channel 32. In this way, when the cutter 3 moves downward, each product cavity 102 and the corresponding flow channel 32 can be staggered, so that multiple products 100 can be separated from multiple sprues 31 at one time, and the side section of the cutter 3 can also grind the cross-section of multiple products 100 at the same time, thereby greatly enhancing the production efficiency of the automatic sprue cutting mold and ensuring the quality uniformity of the products 100.

[0048] In order to further improve the injection molding efficiency, refer to Figure 4 In this embodiment, the above-mentioned flow channel 32 includes a converging channel 321 and four branching flow channels 322. The converging channel 321 is connected to the glue inlet 21 and the four branching flow channels 322. The four branching flow channels 322 are connected to the four product cavities 102 in a one-to-one correspondence. Therefore, the automatic water cutting mold only needs to set one glue inlet 21 on the second mold 2 to inject glue into multiple product cavities 102, thereby effectively improving the efficiency of the injection molding process, simplifying the structure of the second mold 2, and further ensuring that each product cavity 102 can obtain molten plastic evenly and quickly.

[0049] Optionally, refer to Figure 4 、 Figure 5 The automatic watertightness cutting mold provided in this embodiment also includes a product ejector pin 5, which is relatively arranged in the product cavity 102 and can extend from the product cavity 102 to eject the product 100. One implementation method of this embodiment is to provide two first perforations 1021 through the bottom of each product cavity 102, and the two first perforations 1021 correspond to two product ejectors 5. The two product ejectors 5 can eject the product 100 located in the product cavity 102 through the two first perforations 1021. By pushing the surface of the product 100, the product ejector pin 5 can effectively eject the molded product 100 from the first mold 1, thereby preventing the product 100 from sticking in the product cavity 102 and solving the problem of the product 100 automatically falling out of the product cavity 102.

[0050] Optionally, continue with reference to Figure 4、 Figure 5 The automatic sprue cutting mold provided in this embodiment also includes a sprue ejector 6, which is arranged relative to the flow channel 32 and can extend from the flow channel 32 to push out the sprue 31. One of the methods of this embodiment is that, referring to the product ejector 5, three second perforations 1011 arranged at intervals in the vertical direction are provided through the bottom surface of the slide 101, and three third perforations 323 are provided through the corresponding positions on the flow channel 32. The third perforations 323 are provided in a one-to-one correspondence with the second perforations 1011, and the three second perforations 1011 correspond to the three sprue ejectors 6, so that the sprue ejector 6 can pass through the second perforations 1011 and the third perforations 323 in sequence and then push out the sprue 31 located in the flow channel 32. In this way, by pushing the outer wall of the sprue 31, the sprue ejector 6 can effectively push out the sprue 31, thereby preventing the sprue 31 from sticking in the flow channel 32 and reducing damage to the cutter 3.

[0051] In this embodiment, in order to further improve the injection molding efficiency, the automatic sprue cutting mold also includes a top plate, which is connected to the tail ends of the product ejector pin 5 and the sprue ejector pin 6, and is connected to the drive system on the injection molding machine. The top plate can simultaneously control the product ejector pin 5 to extend into the product cavity 102, and control the sprue ejector pin 6 to extend into the runner 32, thereby ejecting the product 100 and the sprue 31 at the same time.

[0052] Of course, it is understandable that in some other parallel embodiments, in order to effectively control the demolding order of the product 100 and the sprue 31, two top plates can also be provided, one of which is connected to the product ejector pin 5, and the other is connected to the sprue ejector pin 6, and both top plates are connected to the drive system on the injection molding machine, so that the drive system can control the product ejector pin 5 and the sprue ejector pin 6 to extend successively, thereby effectively controlling the demolding order of the product 100 and the sprue 31, which helps the staff to manage and control it.

[0053] To ensure precise alignment of the nozzle ejector pin 6 with the second through-hole 1011 and the third through-hole 323, in this embodiment, the cutter 3 has a stepped structure and includes a cutter body 301 and a stopper 302. The cutter body 301 is slidably disposed within the slideway 101, and the flow channel 32 is provided on the cutting surface of the cutter 3. It is understood that a limited stepped surface 303 is formed between the cutter body 301 and the stopper 302.

[0054] One implementation of this embodiment is that the first mold 1 includes a mold base 11 and a mold core 12, and the slide 101 includes a first channel 1012 and a second channel 1013, wherein the mold base 11 is provided with a first channel 1012 vertically through it, and a mounting groove connected to the first channel 1012 is provided on the surface, the mold core 12 is embedded in the mounting groove, and a product cavity 102 is provided on the surface of the mold core 12, and a second channel 1013 is provided vertically through it, and the first through hole 1021 is provided on both the mold base 11 and the mold core 12. The mold core 12, the second through hole 1011 is simultaneously penetrated in the first channel 1012 and the second channel 1013, the second channel 1013 is connected to the first channel 1012, and the opening depth of the second channel 1013 is smaller than that of the first channel 1012, and the width is equal to that of the first channel 1012, so that the cutter body 301 can be slidably set in the first channel 1012 and the second channel 1013, and the limit block 302 can be slidably set in the first channel 1012, so that the limit step surface 303 is arranged relative to the top surface of the mold core 12.

[0055] Reference Figure 7 When the runner 32 and the product cavity 102 are not misaligned, there is a preset distance between the limiting step surface 303 and the top surface of the mold core 12. When the cutter 3 moves downward, so that the limiting step surface 303 is in contact with the top surface of the mold core 12, the cutter body 301 can move to the set position in the second channel 1013. The three third through-holes 323 can be aligned with the corresponding second through-holes 1011 at this time, so that the three sprue ejector pins 6 can accurately pass through the corresponding second through-holes 1011 and the third through-holes 323, thereby reducing the possibility of decreased injection molding efficiency due to inaccurate positioning of the sprue ejector pins 6.

[0056] It can be understood that the interface between the product cavity 102 and the slide 101 forms a draft port 1022. In the process of the product 100 being separated from the product cavity 102, in order to facilitate the smooth removal of the product 100 from the product cavity 102, in this embodiment, the draft port 1022 is formed by referring to FIG. Figure 8 The plane where the demoulding opening 1022 is located is set at an acute angle to the bottom surface of the slide 101. For example, the angle between the demoulding opening 1022 and the bottom surface of the slide 101 is 87°. In this way, the product 100 can be better demoulded and the product 100 can be prevented from being stretched.

[0057] Throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0058] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Automatic water nozzle cutting mold, characterized by: It comprises a first mold (1), a second mold (2) and a cutter (3), wherein: A slideway (101) is formed on the first mold (1), and one of the first mold (1) and the second mold (2) has a glue inlet (21), and the glue inlet (21) is connected to the slideway (101); The cutter (3) is slidably limited and arranged in the slideway (101), and a flow channel (32) for forming a water nozzle (31) is provided on the cutter (3). A product cavity (102) is provided on the first mold (1), and the product cavity (102) is connected to the flow channel (32) through the inner wall of the slideway (101). After the first mold (1) is opened and the cutter (3) slides, the flow channel (32) and the product cavity (102) can be relatively offset so that the sprue (31) and the product (100) are cut and separated.

2. The automatic water cutting mold according to claim 1, characterized in that: The automatic water-cutting die includes a first direction and a second direction perpendicular to each other; The product cavity (102) is formed on the die surface of the first mold (1) by being recessed along the first direction, the flow channel (32) is formed on the blade surface of the cutter (3) by being recessed along the first direction, and the slideway (101) is extended along the second direction.

3. The automatic water cutting mold according to claim 2, characterized in that: A draft opening (1022) is formed on the interface between the product cavity (102) and the slideway (101), and the plane where the draft opening (1022) is located forms an acute angle with the bottom surface of the slideway (101).

4. The automatic water cutting mold according to claim 2, characterized in that: The automatic water-cutting die further comprises a product ejector pin (5), which is arranged relative to the product cavity (102) and can extend from the product cavity (102) to eject the product (100).

5. The automatic water cutting die according to claim 4, characterized in that: The automatic sprue cutting mold further comprises a sprue ejector pin (6), which is arranged relative to the flow channel (32) and can extend from the flow channel (32) to eject the sprue (31).

6. The automatic water cutting die according to claim 5, characterized in that: The automatic sprue cutting mold also includes a top plate, which is transmission-connected to the product ejector pin (5) and the sprue ejector pin (6), and can control the product ejector pin (5) to extend into the product cavity (102), and control the sprue ejector pin (6) to extend into the flow channel (32).

7. The automatic water cutting die according to claim 5, characterized in that: The cutter (3) has a stepped structure and comprises a cutter body (301) and a limiting block (302). The cutter body (301) is slidably arranged in the slideway (101) and is provided with the flow channel (32). A limiting stepped surface (303) is formed between the cutter body (301) and the limiting block (302). The limiting stepped surface (303) is arranged to have a preset distance from the first mold (1). When the limiting stepped surface (303) is in contact with the first mold (1), the cutter body (301) can move to a set position in the slideway (101).

8. The automatic water cutting die according to claim 2, characterized in that: The second direction is parallel to the vertical direction, so that the slideway (101) is extended in the vertical direction, and a discharge port connected to the outside is provided at the bottom of the slideway (101).

9. The automatic water cutting die according to claim 1, characterized in that: A plurality of product cavities (102) are arranged in the circumferential direction of the slideway (101), and each of the product cavities (102) is connected to the slideway (101) through a flow channel (32).

10. The automatic water cutting die according to claim 9, characterized in that: The flow channel (32) includes a converging channel (321) and branching flow channels (322), the converging channel (321) is connected to the glue inlet (21) and a plurality of branching flow channels (322), and the branching flow channels (322) are connected to the product cavity (102) in a one-to-one correspondence.

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