Double-injection injection mold capable of eliminating parting line on surface of sound box shell
By setting movable row positions in the dual injection mold, the parting line on the speaker shell surface is eliminated, and the problem of parting line during the molding of traditional molds is solved, which improves product consistency and production efficiency and reduces costs.
Patent Information
- Application Number
- CN202422392562.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-09-30
AI Technical Summary
When forming the speaker shell in a traditional double injection mold, there are a large number of parting lines on the surface of the second shell, which affects the consistency of the product appearance. The subsequent removal of the parting lines requires time and effort, resulting in low production efficiency and high cost.
A double injection mold that can eliminate the parting line on the surface of the speaker housing is designed, and the displacement is carried out by setting a movable first row position to adapt to the size of the first fixed model cavity or the second fixed model cavity to ensure smooth transition injection molding of the first and second layer shells.
It effectively eliminates the parting line on the surface of the speaker housing, improves the consistency of the product surface, shortens the production cycle, improves production efficiency and reduces costs.
Smart Images
Figure CN223223785U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of injection molds, in particular to a double-shot injection mold capable of eliminating parting lines on the surface of a speaker shell. Background Art
[0002] Molds are various dies and tools used in industrial production to produce desired products through methods such as injection molding, blow molding, extrusion, die casting, forging, smelting, and stamping. They are the tools that, under the action of external forces, transform a blank into a part with a specific shape and size. They are widely used in blanking, die forging, cold heading, extrusion, powder metallurgy compaction, pressure casting, and compression or injection molding of products such as engineering plastics, rubber, and ceramics. Molds have a specific contour or internal cavity shape. Using a contour with a cutting edge allows the blank to be separated (blanked) along the contour line. The internal cavity shape can also be used to give the blank a specific three-dimensional shape.
[0003] The mold generally consists of two parts: a movable mold and a fixed mold (or a male mold and a female mold), which can be separated or combined. When separated, the workpiece is taken out, and when combined, the blank is injected into the mold cavity to form. In the prior art, some speaker shells need to be set with two different materials according to the manufacturer's requirements, so a double-shot injection mold is required to mold the speaker shell; when this double-shot injection mold is used for molding, a slide is set on the movable mold, and the position of the slide is moved to cooperate with the fixed mold to injection-mold the first layer of the shell, and then the slide is moved outward to increase the cavity of the movable mold to continue injection-mold the second layer of the shell; however, when injection-mold the second layer of the shell, the cavity of the movable mold is larger than the cavity of the fixed mold due to the outward movement of the slide, resulting in a large number of parting lines on the surface of the second layer of the shell when injection-molding the second layer of the shell, affecting the appearance consistency of the product; and subsequent de-cloaking is required to eliminate the parting lines, which is time-consuming and labor-intensive, with low production efficiency and high production costs.
[0004] Therefore, it is necessary to study a new technical solution to solve the above problems. Utility Model Content
[0005] In view of this, the present invention aims to address the shortcomings of the existing technology, and its main purpose is to provide a double-shot injection mold that can eliminate the parting lines on the surface of the speaker shell, effectively solving the technical defect in the existing technology that a large number of parting lines exist on the surface of the speaker shell during injection molding when the double-shot injection mold is used.
[0006] To achieve the above-mentioned object, the present invention adopts the following technical solution: a double-shot injection mold capable of eliminating parting lines on the surface of a speaker housing, comprising a first mold located at a first station and a second mold located at a second station; the first mold is provided with a first fixed mold, which is provided with a first fixed mold cavity; the second mold is provided with a second fixed mold, which is provided with a second fixed mold cavity, and the second fixed mold cavity is larger than the first fixed mold cavity; the first mold and the second mold both include a first movable mold having the same structure, the first movable mold including a first convex mold portion and a plurality of first slides provided on the circumference of the first convex mold portion, the plurality of first slides being capable of moving closer to or farther from the first convex mold portion to enclose the movable mold cavity;
[0007] When the first movable mold is joined to the first fixed mold, the first fixed mold cavity can be injection molded with the movable mold cavity to form the first layer of the shell; when the first movable mold is joined to the second fixed mold, the second fixed mold cavity can be injection molded with the movable mold cavity to form the second layer of the shell.
[0008] The beneficial effect of the double-shot injection mold provided by the present application that can eliminate the parting line on the surface of the speaker shell is that: compared with the existing technology, by setting the first row position, it can adapt to the size of the first fixed mold cavity or the second fixed mold cavity for adaptive displacement, thereby solving the technical defect in the traditional technology that a large number of parting lines exist on the surface of the second layer of shell when the double-shot injection mold is used to mold the first layer of shell and the second layer of shell, thereby improving the consistency of the outer surface of the product; at the same time, there is no need for subsequent cloaking operations, which shortens the production cycle, improves production efficiency and reduces production costs.
[0009] As a preferred solution: there are four first rows, and the four first rows are arranged one by one corresponding to the four sides of the first male mold part;
[0010] When the first fixed mold or the second fixed mold is clamped with the first movable mold, the first slide can be pushed to move closer to the first punch portion.
[0011] As a preferred solution: the first slide includes a first movable seat movably mounted on the first movable mold and a first forming block fixedly mounted on a side of the first movable seat facing the first male mold portion;
[0012] When the first fixed mold or the second fixed mold is clamped with the first movable mold, the first fixed mold or the second fixed mold can act on the first movable seat to move and change the distance between the first forming block and the first male mold part.
[0013] As a preferred solution: the first movable mold is equipped with a plurality of first limiting blocks, two first limiting blocks can enclose a first limiting channel, and the first movable seat can be movably installed in the first limiting channel.
[0014] As a preferred solution: a first inclined surface is provided on a side of the first movable seat facing away from the first forming block; a first lower pressing plate is provided at the bottom of the first fixed mold and the second fixed mold; and the first lower pressing plate is provided with a second inclined surface adapted to the first inclined surface;
[0015] When the first fixed mold or the second fixed mold is clamped with the first movable mold, the second inclined surface abuts against the first inclined surface and acts on the first movable seat to move so as to adjust the distance between the first forming block and the first convex mold part.
[0016] As a preferred solution: both the first inclined surface and the second inclined surface are provided with slip-increasing pads.
[0017] As a preferred solution, the inclination of the second inclined surface of the first lower pressing plate installed on the first fixed mold is greater than the inclination of the second inclined surface of the first lower pressing plate installed on the second fixed mold.
[0018] As a preferred solution: the first fixed mold and the second fixed mold are provided with pouring gates, and the upper surface of the first male mold part is provided with multiple glue feed channels, one end of the glue feed channel is connected to the pouring gate, and the other end of the glue feed channel is connected to the dynamic model cavity.
[0019] As a preferred solution, a first notch is provided at one end of the glue inlet channel that is in conduction connection with the dynamic mold cavity.
[0020] As a preferred solution: the first movable mold can be moved up and down and is equipped with an ejector plate, the ejector plate is equipped with a first ejector and a second ejector, the top of the first ejector can be telescopically inserted into the movable mold cavity, and the top of the second ejector can be telescopically inserted into the first gap. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0022] Figure 1 3D schematic diagram of a double-shot injection mold capable of eliminating parting lines on the surface of a speaker housing, provided in an embodiment of the present application;
[0023] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of two first movable molds in a double-shot injection mold capable of eliminating the parting line on the surface of a speaker housing;
[0024] Figure 3 yes Figure 2 A partial enlarged view of point A of the double-shot injection mold that can eliminate the parting line on the surface of the speaker housing;
[0025] Figure 4 yes Figure 2 A partial enlarged view of point B of a two-shot injection mold that can eliminate the parting line on the surface of the speaker housing;
[0026] Figure 5 yes Figure 2 A cross-sectional view of the first lower pressing plate and the first row position in the double-shot injection mold that can eliminate the parting line on the surface of the speaker housing;
[0027] Figure 6 yes Figure 1 A first cross-sectional view of a first mold in a two-shot injection mold capable of eliminating parting lines on the surface of a speaker housing;
[0028] Figure 7 yes Figure 6 A partial enlarged view of point A of the double-shot injection mold that can eliminate the parting line on the surface of the speaker housing;
[0029] Figure 8 yes Figure 1 A first cross-sectional view of a second mold in a two-shot injection mold capable of eliminating parting lines on the surface of a speaker housing;
[0030] Figure 9 yes Figure 8 The enlarged view of the part A of the double-shot injection mold that can eliminate the parting line on the surface of the speaker shell is shown.
[0031] Among them, the reference numerals in the figures are:
[0032] 10. Double-shot injection mold capable of eliminating parting lines on the surface of the speaker housing; 101. First station; 102. Second station;
[0033] 11. First mold; 111. First fixed mold; 112. First fixed mold cavity; 113. First lower pressing plate; 1131. Second inclined surface; 1132. Slip pad; 114. Pouring gate;
[0034] 12. Second mold; 121. Second fixed mold; 122. Second fixed mold cavity;
[0035] 13. First movable mold; 131. First punch part; 1311. Glue inlet channel; 1312. First notch; 132. First slide; 1321. First movable seat; 1322. First molding block; 1323. First inclined surface; 133. Movable mold cavity; 134. First limit block; 135. Ejector plate. DETAILED DESCRIPTION
[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0037] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.
[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.
[0040] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
[0041] Please also refer to Figures 1 to 9 The double-shot injection mold for eliminating the parting line on the surface of the speaker housing provided by the embodiment of the present application is now described. The double-shot injection mold for eliminating the parting line on the surface of the speaker housing includes: a first mold 11 and a second mold 12.
[0042] The first mold 11 and the second mold 12 are installed one by one corresponding to the first station 101 and the second station 102 of the injection molding machine. The first mold 11 is provided with a first fixed mold 111, and the first fixed mold 111 is provided with a first fixed mold cavity 112; the second mold 12 is provided with a second fixed mold 121, and the second fixed mold 121 is provided with a second fixed mold cavity 122, and the second fixed mold cavity 122 is larger than the first fixed mold cavity 112; the first fixed mold cavity 112 is used to form the first layer of the shell, and the second fixed mold cavity 122 is used to form the second layer of the shell. The first mold 11 and the second mold 12 both include a first movable mold 13 with the same structure. The first movable mold 13 includes a first punch portion 131 and a plurality of first slide positions 132 arranged on the periphery of the first punch portion 131. The plurality of first slide positions 132 can be displaced closer to or farther from the first punch portion 131 to enclose a movable mold cavity 133. When the first movable mold 13 is clamped with the first fixed mold 111, the first fixed mold cavity 112 can be injection molded with the movable mold cavity 133 to form the first layer of the outer shell 100. When the first movable mold 13 is clamped with the second fixed mold 121, the second fixed mold cavity 122 can be injection molded with the movable mold cavity 133 to form the second layer of the outer shell 200.
[0043] During operation, first, the first fixed mold 111 and the first movable mold 13 are closed, and the first layer of the shell is injection molded using the first fixed mold cavity 112 and the movable mold cavity 133; then the first fixed mold 111 and the first movable mold 13 are opened, and at this time the first layer of the shell is attached to the first movable mold 13; then the first movable mold 13 containing the first layer of the shell is rotated and switched to the second workstation 102, and the first movable mold 13 and the second fixed mold are closed. After the first movable mold 13 and the second fixed mold are closed, the first slide 132 will be moved a certain distance away from the first convex mold part 131, so that the surface of the first slide 132 and the second fixed mold cavity 122 have a smooth transition, and the second layer of the shell is injection molded and the second layer of the shell is molded together with the first layer of the shell to obtain a speaker shell.
[0044] Specifically, by setting the first row position 132, it can adapt to the size of the first fixed mold cavity 112 or the second fixed mold cavity 122 for adaptive displacement, so that the surface of the first row position 132 can be smoothly transitioned with the surface of the first fixed mold cavity 112 or the second fixed mold cavity 122 respectively, without the problem of clamping lines; thereby solving the technical defect of the traditional technology that a large number of parting lines exist on the surface of the second layer of shell when the double-shot injection mold is used to mold the first layer of shell and the second layer of shell, thereby improving the consistency of the outer surface of the product; at the same time, there is no need for subsequent cloaking operations, which shortens the production cycle, improves production efficiency and reduces production costs.
[0045] In some embodiments of the present application, there are four first slides 132, and the four first slides 132 are arranged one by one corresponding to the four sides of the first punch portion 131; when the first fixed mold 111 or the second fixed mold 121 is closed with the first movable mold 13, the first slides 132 can be pushed to move closer to the first punch portion 131.
[0046] Preferably, the first row 132 includes a first movable seat 1321 movably mounted on the first movable mold 13 and a first forming block 1322 fixedly mounted on the side of the first movable seat 1321 facing the first punch part 131; when the first fixed mold 111 or the second fixed mold 121 is clamped with the first movable mold 13, the first fixed mold 111 or the second fixed mold 121 can act on the first movable seat 1321 to move and change the distance between the first forming block 1322 and the first punch part 131.
[0047] It can be understood that by driving the first movable seat 1321 to move, the surface of the first molding block 1322 can be smoothly transitioned with the surface of the first fixed mold cavity or the surface of the second fixed mold cavity 122, so as to solve the technical defect of the traditional technology that causes the surface of the speaker shell to be clamped when the speaker shell is injection molded.
[0048] It should be noted that the first movable seat is provided with an elastic member such as a spring or elastic rubber, so that the first movable seat can automatically return to its initial state after the force acting on the first movable seat is cancelled.
[0049] Furthermore, the first movable mold 13 is equipped with a plurality of first limiting blocks 134, two of which can enclose a first limiting channel, and the first movable seat 1321 is movably installed in the first limiting channel. The first movable seat 1321 has a first inclined surface 1323 on the side facing away from the first forming block 1322. The first fixed mold 111 and the second fixed mold 112 are provided with a first lower pressing plate 113 at the bottom, and the first lower pressing plate 113 is provided with a second inclined surface 1131 adapted to the first inclined surface 1323. When the first fixed mold 111 or the second fixed mold 112 is closed with the first movable mold 13, the second inclined surface 1131 abuts against the first inclined surface 1323 and causes the first movable seat 1321 to move to adjust the distance between the first forming block 1322 and the first punch portion 131.
[0050] Preferably, the first inclined surface 1323 and the second inclined surface 1131 are both provided with a slip pad 1132, and the slip pad 1132 is made of Teflon material; the slip pad 1132 can be set to reduce the problem of friction caused by the first inclined surface 1323 and the second inclined surface abutting against each other, which is beneficial to control the smooth transition setting between the surface of the first molding block 1322 and the surface of the first fixed mold cavity or the second fixed mold cavity 122, thereby ensuring the yield of the injection molding of the speaker shell.
[0051] In more detail, the slope of the second inclined surface 1131 of the first lower pressing plate 113 installed on the first fixed mold 111 is greater than the slope of the second inclined surface 1131 of the first lower pressing plate 113 installed on the second fixed mold 121 .
[0052] For example, with the vertical plane as a reference, the second inclined surface 1131 of the first lower pressing plate 113 of the first fixed mold is tilted between 40 and 75 degrees relative to the vertical plane, so that the second inclined surface 1131 of the first lower pressing plate 113 of the first fixed mold abuts against the corresponding first inclined surface 1323 and drives the corresponding first movable seat 1321 to move 15 mm to 25 mm toward the first punch portion 131, thereby causing the first fixed mold cavity and the movable mold cavity 133 to injection mold the first layer of the shell. The second inclined surface 1131 of the first lower pressing plate 113 of the second fixed mold is tilted between 10 and 35 degrees relative to the vertical plane, so that the second inclined surface 1131 of the first lower pressing plate 113 of the second fixed mold abuts against the corresponding first inclined surface 1323 and drives the corresponding first movable seat 1321 to move 5 mm to 10 mm toward the first punch portion 131, thereby increasing the space of the movable mold cavity 133 to injection mold the second layer of the shell.
[0053] Furthermore, the first fixed mold 111 and the second fixed mold 112 are provided with a pouring port 114. The upper surface of the first male mold portion 131 is provided with multiple glue feed channels 1311. One end of the glue feed channel 1311 is electrically connected to the pouring port 114, and the other end is electrically connected to the movable mold cavity 133. A first notch 1312 is provided at one end of the glue feed channel 1311 that is electrically connected to the movable mold cavity 133. The first movable mold 13 is mounted with an ejector plate 135 that can be moved up and down. The ejector plate 135 is mounted with a first ejector and a second ejector. The top of the first ejector can be extended and retracted into the movable mold cavity 133, and the top of the second ejector can be extended and retracted into the first notch 1312.
[0054] Specifically, the first notch 1312 is provided to form a rubber block, and the first notch 1312 is formed by extending and retracting the second ejector pin, so as to assist in blanking the speaker housing by ejecting the molded rubber block.
[0055] It should be noted that the structure of the first and second ejector pins is concealed due to their excessive number, making them difficult to display. Furthermore, their placement is a common design practice for those skilled in the art. The specific ejection order for the first and second ejector pins is as follows: the second ejector pin is ejected first, followed by the first ejector pin.
[0056] The above is merely a preferred embodiment of the present invention and only specifically describes the technical principles of the present invention. These descriptions are intended only to explain the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention, as well as other specific embodiments of the present invention that can be imagined by those skilled in the art without inventive effort, shall be included within the scope of protection of the present invention.
Claims
1. A double-shot injection mold capable of eliminating parting lines on the surface of a speaker housing, characterized by: It includes a first mold (11) located at a first workstation (101) and a second mold (12) located at a second workstation (102); The first mold (11) is provided with a first fixed mold (111), and the first fixed mold (111) is provided with a first fixed mold cavity (112); the second mold (12) is provided with a second fixed mold (121), and the second fixed mold (121) is provided with a second fixed mold cavity (122), and the second fixed mold cavity (122) is larger than the first fixed mold cavity (112); The first mold (11) and the second mold (12) both include a first movable mold (13) having the same structure, the first movable mold (13) including a first convex mold portion (131) and a plurality of first sliding positions (132) arranged around the first convex mold portion (131), the plurality of first sliding positions (132) being capable of moving closer to or farther from the first convex mold portion (131) to enclose a movable mold cavity (133); When the first movable mold (13) and the first fixed mold (111) are closed, the first fixed mold cavity (112) and the movable mold cavity (133) can be injection molded to form the first layer of the shell (100); When the first movable mold (13) and the second fixed mold (121) are closed, the second fixed mold cavity (122) and the movable mold cavity (133) can be injection molded to form the second shell (200).
2. The double-shot injection mold capable of eliminating the parting line on the surface of the speaker housing according to claim 1, characterized in that: There are four first rows (132), and the four first rows (132) are arranged one by one corresponding to the four sides of the first male mold part (131); When the first fixed mold (111) or the second fixed mold (121) is clamped with the first movable mold (13), the first slide (132) can be pushed to move closer to the first punch portion (131).
3. The double-shot injection mold capable of eliminating the parting line on the surface of the speaker housing according to claim 1 or 2, characterized in that: The first row position (132) comprises a first movable seat (1321) movably mounted on the first movable mold (13) and a first forming block (1322) fixedly mounted on the first movable seat (1321) facing the first male mold portion (131); When the first fixed mold (111) or the second fixed mold (121) is clamped with the first movable mold (13), the first fixed mold (111) or the second fixed mold (121) can act on the first movable seat (1321) to move and change the distance between the first molding block (1322) and the first punch portion (131).
4. The double-shot injection mold capable of eliminating the parting line on the surface of the speaker housing according to claim 3, characterized in that: The first movable mold (13) is equipped with a plurality of first limiting blocks (134), two of the first limiting blocks (134) are capable of surrounding a first limiting channel, and the first movable seat (1321) is movably installed in the first limiting channel.
5. The double-shot injection mold capable of eliminating the parting line on the surface of the speaker housing according to claim 3, characterized in that: A first inclined surface (1323) is provided on a side of the first movable seat (1321) facing away from the first forming block (1322); a first lower pressing plate (113) is provided at the bottom of the first fixed mold (111) and the second fixed mold (121); and the first lower pressing plate (113) is provided with a second inclined surface (1131) adapted to the first inclined surface (1323); When the first fixed mold (111) or the second fixed mold (121) is closed with the first movable mold (13), the second inclined surface (1131) abuts against the first inclined surface (1323) and acts on the first movable seat (1321) to move to adjust the distance between the first molding block (1322) and the first punch portion (131).
6. The double-shot injection mold capable of eliminating parting lines on the surface of a speaker housing according to claim 5, characterized in that: The first inclined surface (1323) and the second inclined surface (1131) are both provided with a slip-increasing pad (1132).
7. The double-shot injection mold capable of eliminating the parting line on the surface of the speaker housing according to claim 5 or 6, characterized in that: The inclination of the second inclined surface (1131) of the first lower pressing plate (113) installed on the first fixed mold (111) is greater than the inclination of the second inclined surface (1131) of the first lower pressing plate (113) installed on the second fixed mold (121).
8. The double-shot injection mold capable of eliminating parting lines on the surface of a speaker housing according to claim 1, characterized in that: The first fixed mold (111) and the second fixed mold (121) are provided with a pouring port (114), and the upper surface of the first convex mold portion (131) is provided with a plurality of glue feed channels (1311), one end of the glue feed channel (1311) is connected to the pouring port (114), and the other end of the glue feed channel (1311) is connected to the dynamic mold cavity (133).
9. The double-shot injection mold capable of eliminating parting lines on the surface of a speaker housing according to claim 8, characterized in that: A first notch (1312) is provided at one end of the glue inlet channel (1311) that is in conductive connection with the dynamic model cavity (133).
10. The double-shot injection mold capable of eliminating parting lines on the surface of a speaker housing according to claim 9, characterized in that: The first movable mold (13) is movable up and down and is equipped with an ejector plate (135). The ejector plate (135) is equipped with a first ejector and a second ejector. The top of the first ejector can be telescoped into the movable mold cavity (133), and the top of the second ejector can be telescoped into the first notch (1312).