Structure for eliminating water clamping line of injection mold

Abstract

The utility model discloses a structure for eliminating a water clamping line of an injection mold, which is characterized in that a plate A, a plate B, a base and a cutter component are arranged in a matched manner, a forming groove is formed in one surface, close to the plate A, of the plate B, a cutter accommodating groove is formed in the plate B, a cutter accommodating hole is formed in a position, communicated with the cutter accommodating groove in the vertical direction, of the forming groove, and the cutter component comprises a cutter. The shape and size of the top of the cutter are matched with the shape and size of the cutter containing hole, the cutter is jointly matched with the cutter containing hole and the forming groove to form a drainage groove when the cutter is located at the initial position, a sizing material enters the forming groove through the feeding port, then enters the drainage groove midway and then enters the forming groove, and a drainage material is formed in the position of the drainage groove after a product is formed. When the water clamping line is located in the drainage material, the drainage material is cut off through the cutter, and therefore the water clamping line is removed from the machined and formed plastic product, the appearance of the plastic product is free of the water clamping line, the water clamping line is removed under the condition that the shape of the product is not changed, and the overall quality of the product is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic molds, in particular to a structure for eliminating water lines in an injection mold. Background Art

[0002] A plastic mold is a modular mold used for compression molding, extrusion molding, injection molding, blow molding, and low-foaming molding. By coordinating the die and auxiliary molding systems, a wide range of plastic parts can be produced. These molds primarily include a female mold with a variable cavity, consisting of a female mold assembly base, a female mold component, and a female mold assembly plate; and a male mold with a variable core, consisting of a male mold assembly base, a male mold component, a male mold assembly plate, a cavity truncation component, and a side truncation plate.

[0003] However, conventional plastic products currently have water lines wherever there is a through hole and the plastic meets, causing the injection molded plastic product to fail to meet appearance requirements. An additional process is required to remove the water lines, reducing processing efficiency. Utility Model Content

[0004] The purpose of the present invention is to provide a structure for eliminating water lines in an injection mold, so as to solve the problem in the background art that plastic products with through holes have water lines, resulting in unsatisfactory appearance.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A structure for eliminating waterline in an injection mold, comprising an A plate, a B plate, a base, and a cutter assembly, wherein the A plate is mounted on the B plate, and the B plate is mounted on the base;

[0007] A feed port is provided on the top surface of plate A, a forming groove is provided on a side of plate B close to plate A, the feed port is connected to the forming groove, a cutter accommodating groove is provided on plate B, a cutter accommodating hole is provided on the forming groove at a position vertically connected to the cutter accommodating groove, the cutter assembly is installed at a position on the base that is adapted to the cutter accommodating groove in the vertical direction, the cutter assembly includes a cutter, and the cutter moves vertically in the cutter accommodating hole through the cutter accommodating groove under the action of external power, and the shape and size of the top of the cutter are adapted to the shape and size of the cutter accommodating hole.

[0008] In one embodiment, the cutter assembly also includes an in-mold multi-layer boost cylinder, a top column, a cutter seat, and a return spring. The in-mold multi-layer boost cylinder is fixedly mounted on the base, the top column is mounted on the in-mold multi-layer boost cylinder, and the in-mold multi-layer boost cylinder drives the top column to move in the vertical direction. The cutter seat is mounted on the top column, the cutter is mounted on the cutter seat, and the return spring is mounted on the cutter seat and abuts against the bottom surface of the forming groove.

[0009] In one embodiment, there are two return springs, which are symmetrically arranged at both ends of the cutter seat.

[0010] In one embodiment, when the cutter is in the initial position, it cooperates with the cutter receiving hole and the forming groove to form a drainage groove.

[0011] In one embodiment, the cutter seat is adapted to the shape and size of the cutter receiving groove.

[0012] In one embodiment, the in-mold multi-layer booster cylinder is connected to a hydraulic control system.

[0013] In one embodiment, a glue flow groove is provided on the A plate, and the glue flow groove is connected to the feed port and the molding groove respectively.

[0014] In one embodiment, a glue inlet is provided on the molding groove, and the glue inlet is connected to the bottom of the glue flow groove and the drainage groove respectively.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The above-mentioned structure of the injection mold for eliminating water lines is arranged by cooperating with the A plate, the B plate and the base, and the cutter assembly. A molding groove is provided on the side of the B plate close to the A plate, and a cutter accommodating groove is provided on the B plate. A cutter accommodating hole is provided on the molding groove at a position connected to the cutter accommodating groove in the vertical direction. The cutter assembly includes a cutter, and the shape and size of the top of the cutter are adapted to the shape and size of the cutter accommodating hole. When the cutter is in the initial position, it cooperates with the cutter accommodating hole and the molding groove to form a drainage groove. After the rubber material enters the molding groove through the feed port, it enters the drainage groove midway and then enters the molding groove. After the product is molded, drainage material is formed at the position of the drainage groove. At this time, the water line is in the drainage material. At this time, the drainage material is cut off by the cutter, thereby removing the water line from the processed and molded plastic product, so that the appearance of the plastic product has no water line, and the water line is solved without changing the shape of the product, thereby improving the overall quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1This is a schematic diagram of the assembly structure of a structure for eliminating water lines in an injection mold according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A schematic cross-sectional view of a structure for eliminating waterline in an injection mold according to an embodiment of the present invention;

[0019] Figure 3 for Figure 1 A schematic diagram of the assembly structure of the B plate and the base of an injection mold structure for eliminating the waterline in one embodiment of the present invention;

[0020] Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A of a structure for eliminating waterline in an injection mold according to an embodiment of the present invention;

[0021] Figure 5 for Figure 1 A schematic diagram of the assembly structure of the B plate, base, and cutter assembly of an injection mold structure for eliminating the waterline in one embodiment of the present invention;

[0022] Figure 6 for Figure 1 A product of a structure for eliminating waterline in an injection mold according to an embodiment of the present invention includes a schematic diagram of a waterline state;

[0023] Figure 7 for Figure 1 A schematic structural diagram of a cutter assembly for eliminating waterline in an injection mold according to an embodiment of the present invention;

[0024] Figure 8 for Figure 1 A diagram showing a state of a product after the waterline of an injection mold structure is eliminated in one embodiment of the present invention. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] It should be noted that when an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element. In contrast, when an element is said to be "directly" connected to another element, there are no intermediate elements.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended only to describe specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] See also Figure 1 、 Figure 2 : A structure for eliminating waterline in an injection mold, comprising an A plate 1, a B plate 2, a base 3, and a cutter assembly 4, wherein the A plate 1 is mounted on the B plate 2, and the B plate 2 is mounted on the base 3;

[0029] A feed port 11 is provided on the top surface of the A plate 1, and a molding groove 21 is provided on the side of the B plate 2 close to the A plate 1. The feed port 11 is connected to the molding groove 21. A cutter accommodating groove 22 is provided on the B plate 2, and a cutter accommodating hole 23 is provided on the molding groove 21 at a position vertically connected to the cutter accommodating groove 22. The cutter assembly 4 is installed on the base 3 at a position vertically matched with the cutter accommodating groove 22. The cutter assembly 4 includes a cutter 41. The cutter 41 moves vertically in the cutter accommodating hole 23 through the cutter accommodating groove 22 under the action of external power. The shape and size of the top of the cutter 41 are matched with the shape and size of the cutter accommodating hole 23.

[0030] See also Figure 3 、 Figure 4 : When the cutter 41 is in the initial position, it cooperates with the cutter accommodating hole 23 and the molding groove 21 to form a drainage groove 24. A glue flow groove 12 is provided on the A plate 1, and the glue flow groove 12 is respectively connected to the feed port 11 and the molding groove 21. A glue inlet 211 is provided on the molding groove 21, and the glue inlet 211 is respectively connected to the bottom of the glue flow groove 12 and the drainage groove 24.

[0031] See also Figure 5 、 Figure 6: When injection molding begins, the cutter 41 is in the initial position, the rubber enters the rubber flow groove 12 through the feed port 11, and then enters the rubber flow groove 12 into the rubber inlet 211, and the rubber enters the drainage groove 24 through the rubber inlet 211. After the drainage groove 24 is filled with rubber, the molding groove 21 is filled with rubber. In this embodiment, a product 5 with two through holes is initially injection molded on a plastic plate. If there is a water clamp at the position where the through hole and the plastic are combined, then a water clamp will appear at the position of the drainage groove 24. After the product 5 is formed, drainage material 6 will appear at the position of the drainage groove 24. At this time, the drainage material 6 is on the cutter 41. At this time, the A plate 1 squeezes the product 5, and the cutter 41 moves toward the A plate 1 under the action of external force, cutting the drainage material 6 from the product 5, and thus cutting off the water clamp.

[0032] In this way, an injection mold structure for eliminating the waterline is provided, through the cooperation of the A plate 1, the B plate 2 and the base 3, and the cutter assembly 4. The B plate 2 has a molding groove 21 on the side close to the A plate 1, and a cutter receiving groove 22 is provided on the B plate 2. A cutter receiving hole 23 is provided on the molding groove 21 at a position connected to the cutter receiving groove 22 in the vertical direction. The cutter assembly 4 includes a cutter 41. The shape and size of the top of the cutter 41 are adapted to the shape and size of the cutter receiving hole 23. When the cutter 41 is in the initial position, it is in contact with the cutter. The knife accommodating hole 23 and the molding groove 21 cooperate to form a drainage groove 24. The rubber material enters the drainage groove 24 through the feed port 11 and then enters the molding groove 21. After the product is formed, a drainage material 6 is formed at the position of the drainage groove 24. At this time, the waterline is in the drainage material 6. At this time, the drainage material 6 is cut off by the cutter 41, thereby removing the waterline from the processed and molded plastic product, so that the appearance of the plastic product has no waterline, and the waterline is solved without changing the shape of the product, thereby improving the overall quality and efficiency of the product.

[0033] See also Figure 7 In one embodiment, the cutter assembly 4 also includes an in-mold multi-layer boosting cylinder 42, a top column 43, a cutter seat 44, and a return spring 45. The in-mold multi-layer boosting cylinder 42 is fixedly mounted on the base 3, and the top column 43 is mounted on the in-mold multi-layer boosting cylinder 42. The in-mold multi-layer boosting cylinder 42 drives the top column 43 to move in the vertical direction. The cutter seat 44 is mounted on the top column 43, and the cutter 41 is mounted on the cutter seat 44. The return spring 45 is mounted on the cutter seat 44 and abuts against the bottom surface of the forming groove 21.

[0034] There are two return springs 45 symmetrically arranged at both ends of the cutter seat 44. The cutter seat 44 is adapted to the shape and size of the cutter receiving groove 22. The in-mold multi-layer booster cylinder 42 is connected to a hydraulic control system.

[0035] Thus, when the drainage material 6 needs to be cut, the hydraulic control system activates the in-mold multi-layer pressurizing cylinder 42. The in-mold multi-layer pressurizing cylinder 42, via the top column 43, controls the cutter seat 44 and the cutter 41 to move toward the A plate 1 until the drainage material 6 is cut from the product 5. At this time, the return spring 45 is in a compressed state. When the hydraulic control system stops the in-mold multi-layer pressurizing cylinder 42, the return spring 45 returns the cutter 41 to its initial position via the cutter seat 44 during the deformation recovery process.

[0036] Finally, it should be noted that the in-mold multi-layer booster cylinder 42 is patent number 2023231541728. The in-mold multi-layer booster cylinder recorded in the patent number can generate greater thrust without changing its own width, so that it can be assembled on a mold with a smaller internal space, so that the mold as a whole has a higher hydraulic cutting ability, which can be adapted to the use of molds of more products, and can cut plastic sprues and water lines generated during the injection molding of plastic products.

[0037] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A structure for eliminating waterline in an injection mold, characterized by: It includes an A plate, a B plate, a base, and a cutter assembly, wherein the A plate is mounted on the B plate, and the B plate is mounted on the base; A feed port is provided on the top surface of plate A, a forming groove is provided on a side of plate B close to plate A, the feed port is connected to the forming groove, a cutter accommodating groove is provided on plate B, a cutter accommodating hole is provided on the forming groove at a position vertically connected to the cutter accommodating groove, the cutter assembly is installed at a position on the base that is adapted to the cutter accommodating groove in the vertical direction, the cutter assembly includes a cutter, and the cutter moves vertically in the cutter accommodating hole through the cutter accommodating groove under the action of external power, and the shape and size of the top of the cutter are adapted to the shape and size of the cutter accommodating hole.

2. The structure for eliminating waterline in an injection mold according to claim 1, characterized in that: The cutter assembly also includes an in-mold multi-layer pressurized oil cylinder, a top column, a cutter seat, and a return spring. The in-mold multi-layer pressurized oil cylinder is fixedly mounted on the base, the top column is mounted on the in-mold multi-layer pressurized oil cylinder, and the in-mold multi-layer pressurized oil cylinder drives the top column to move in the vertical direction. The cutter seat is mounted on the top column, the cutter is mounted on the cutter seat, and the return spring is mounted on the cutter seat and abuts against the bottom surface of the forming groove.

3. The structure for eliminating waterline in an injection mold according to claim 2, characterized in that: There are two return springs, which are symmetrically arranged at both ends of the cutter seat.

4. The structure for eliminating waterline in an injection mold according to claim 3, characterized in that: When the cutter is in the initial position, it cooperates with the cutter accommodating hole and the forming groove to form a drainage groove.

5. The structure for eliminating waterline in an injection mold according to claim 3, characterized in that: The shape and size of the cutter seat are adapted to the cutter accommodating groove.

6. The structure for eliminating waterline in an injection mold according to claim 3, characterized in that: The in-mold multi-layer pressurized oil cylinder is connected to a hydraulic control system.

7. The structure for eliminating waterline in an injection mold according to claim 4, characterized in that: The A plate is provided with a glue flow groove, which is connected to the feed port and the molding groove respectively.

8. The structure for eliminating waterline in an injection mold according to claim 7, characterized in that: The molding groove is provided with a glue inlet, and the glue inlet is communicated with the bottom of the glue flow groove and the drainage groove respectively.

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