Injection molding mold core structure of automobile horn cover

Abstract

The utility model relates to the technical field of injection mold manufacturing, in particular to an injection molding mold core structure of an automobile horn cover. Comprising a fixed mold plate and a movable mold plate which correspond to each other, a first forming cavity and a second forming cavity which are matched with the horn cover are formed in the close faces of the fixed mold plate and the movable mold plate respectively, and the first forming cavity is matched with one side, corresponding to a decorative counter bore, of a plate body in shape and corresponds to the decorative counter bore; a group of counter bore forming convex parts are arranged on the forming surface of the first forming cavity; a perforating forming block is embedded in the area, corresponding to the second forming cavity, of the movable mold plate, a set of perforating forming protruding parts are arranged on the forming face of the perforating forming block, and the forming face of the perforating forming block corresponds to the perforating area in shape. And the latticed forming piece can be effectively prevented from deforming in the mold opening process.

Description

Technical Field

[0001] The utility model relates to the technical field of injection mold manufacturing, in particular to an injection molding mold core structure for an automobile horn cover. Background Art

[0002] The automobile horn cover discussed in this application is as follows Figure 1 and 2 As shown: the speaker cover 1 includes a plate body 11, one side of the plate body 11 is provided with decorative countersunk holes 111 of a preset depth in a grid shape, and a perforated area 12 is provided on the plate body 11, and the decorative countersunk holes 111 corresponding to the perforated area 12 penetrate the plate body 11. The side of the plate body 11 corresponding to the decorative countersunk holes 111 is the outer surface of the speaker cover. In injection molding, the molding cavity on the fixed mold core usually corresponds to this side, and the perforations in the perforated area 12 are also consistent with the shape of the decorative countersunk holes 111. When designing the mold, a group of convex parts adapted to the decorative countersunk holes 111 will be set on the molding cavity of the fixed mold core, and convex parts with deeper depths will be set corresponding to the perforations in the perforated area 12. However, during the mold opening process, the movable mold plate needs to move the molded product away from the fixed mold plate simultaneously. Since the convex part and the perforated side wall will generate friction, when the perforation density is too large, the fixed mold plate will generate an outward pulling force on the molded product, causing the shape of the perforated area 12 to deform during this process. In severe cases, it may cause the grid-like molded part in the perforated area 12 to break. Utility Model Content

[0003] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a mold core structure for injection molding of an automobile horn cover, which can effectively prevent the grid-shaped molded part from being deformed during the mold opening process.

[0004] A mold core structure for injection molding of a car horn cover, used for injection molding of the horn cover, the horn cover comprises a plate body, one side of the plate body is provided with decorative countersunk holes of preset depth in a grid shape, a perforated area is provided on the plate body, and the decorative countersunk holes corresponding to the perforated area penetrate the plate body;

[0005] It comprises a fixed mold plate and a movable mold plate corresponding to each other, wherein the fixed mold plate and the movable mold plate are respectively provided with a first molding cavity and a second molding cavity adapted to the horn cover on adjacent surfaces, wherein the first molding cavity is adapted to the shape of one side of the plate body corresponding to the decorative countersunk hole, and a group of countersunk hole molding convex parts are provided on the molding surface of the first molding cavity corresponding to the decorative countersunk hole;

[0006] A perforation forming block is embedded in the second forming cavity area corresponding to the movable template, a group of perforation forming protrusions are provided on the forming surface of the perforation forming block, the forming surface of the perforation forming block corresponds to the shape of the perforation area, and the perforation forming protrusions are adapted to the shape of the perforations in the perforation area; a first plug-in is provided on the perforation forming block, a first forming protrusion is provided at the front end of the first plug-in, the first plug-in is penetrated on the perforation forming block, the first forming protrusion extends out of the forming surface of the perforation forming block, the first forming protrusion is adapted to the shape of the perforations in the perforation area, and resistance lines are provided on the side of the first forming protrusion.

[0007] Based on the above structure, the principle of the injection molding mold core structure of the automobile horn cover is as follows: a perforation molding block is set on the second molding cavity, and the perforation molding protrusion is set to cooperate with the countersunk molding protrusion to complete the molding of the perforations in the perforation area, which can reduce the contact area between the countersunk molding protrusion and the perforated side wall of the molded part in the perforation area, thereby reducing the pulling force of the first molding cavity on the product in the perforation area during the mold opening process. In addition, a first plug-in is also set, and the shape of the first molding protrusion is consistent with the perforation molding protrusion. By setting a resistance pattern on the side wall of the first molding protrusion, the pulling force of the perforation molding block on the molded product in the perforation area during the mold opening process can be increased, ensuring that the molded product in the perforation area fits the perforation molding block and moves synchronously with the moving template in the mold opening direction. It should be noted that after the mold opening, the molded product as a whole is ejected from the second molding cavity by the ejector plate of the mold driving the ejector, which belongs to conventional technology and will not be described in detail.

[0008] Furthermore, in the mold core structure for injection molding of a car horn cover described in the present application, the number of the first molding protrusions is less than or equal to 10, and they are arranged at intervals from each other. As a preferred embodiment of the present application, it should be noted that the number of the first molding protrusions is based on the ability to pull the molded product out of the corresponding perforated area from the first molding cavity as a whole. If too many are set, on the one hand, the manufacturing cost will increase, and on the other hand, the first molding protrusions will cause the molded product to be pulled out of shape by the ejector pin during the demolding process.

[0009] Furthermore, in the mold core structure for injection molding of a car horn cover described in the present application, the movable mold plate is provided with a mounting groove adapted to the shape of the perforated molding block, the perforated molding block is installed in the mounting groove, the perforated molding block is provided with a water tank on one side near the bottom of the mounting groove, and the mounting groove is provided with a water hole connected to the water tank. As a preferred embodiment of the present application, during demoulding, cooling water is introduced from the water hole to the water tank to cool the molded part in the corresponding perforated area, and the molded part shrinks after cooling, resulting in an enlarged perforated aperture in the corresponding perforated area, so that the ejector pin can eject the molded part from the second molding cavity.

[0010] Furthermore, in the injection molding mold core structure of a car horn cover described in the present application, the water tank is C-shaped as a whole, the water holes are arranged in pairs at both ends of the water tank, and the first plug-in is distributed on both sides of the water tank.

[0011] Furthermore, in the injection molding mold core structure of a car horn cover described in the present application, specifically, the first plug-in is in the shape of a rod and is inserted into the perforated molding block from the bottom of the perforated molding block, and the perforated molding block is provided with a slot of a corresponding shape, and the first plug-in is provided with a limiting protrusion at one end away from the first molding protrusion. As a preferred solution of the present application, the limiting protrusion can realize the axial limitation of the first plug-in when the perforated molding block is installed on the mounting groove.

[0012] Furthermore, in the injection molding mold core structure of a car horn cover described in the present application, a mounting protrusion is provided on the side of the plate body away from the decorative countersunk hole, a slot is provided on the side of the mounting protrusion, a connecting platform is provided on the upper end of the mounting protrusion, the connecting platform includes a vertical plate parallel to the extending direction of the slot, and a through hole is provided on the vertical plate;

[0013] The movable template is provided with a sliding plug-in adapted to the slot, and the sliding plug-in can slide in a direction parallel to the extension direction of the slot through a driving member. The sliding plug-in is provided with a pin adapted to the thickness of the vertical plate, and the side shape of the pin is adapted to the projection shape of the perforation as a whole; a socket is provided on the connecting platform corresponding to the pin. As a preferred solution of the present application, in the process of injection molding, the molded part is provided with a concave and convex shape on the side, which often requires the use of a slider plug-in to achieve molding. When the mold is opened, the slider plug-in is opened laterally by a driver to separate the plug-in from the molded product. The driving member is usually a cylinder or an inclined guide rod. In the present application, since the vertical plate and the slot extend in the same direction, the perforation is orthogonal to the extension direction of the slot, so it is generally necessary to set two plug-ins in orthogonal directions to achieve the molding of the slot and the perforation. However, since the perforation and the slot are arranged compactly, it is difficult to have space on the movable template to set two plug-ins at the same time. In order to solve the above problems, the present application sets a pin on the sliding plug-in corresponding to the slot, and the thickness of the pin is adapted to the thickness of the vertical plate. During injection molding, the pin enters the connecting platform from the extension direction of the slot and penetrates the side of the vertical plate. Since the thickness of the pin and the vertical plate are adapted, a perforation can be formed on the side of the vertical plate, thereby realizing the simultaneous molding of the slot and the jack with orthogonal extension directions through a sliding plug-in. The jack on the connecting platform is a molding process hole and has nothing to do with the actual function of the product.

[0014] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0015] It can be seen from the above technical solution that the utility model has the following beneficial effects:

[0016] 1. The utility model provides a mold core structure for injection molding of an automobile horn cover, wherein a perforation molding block is arranged on the second molding cavity, and the molding of the perforations in the perforation area is completed by arranging a perforation molding convex portion and a countersunk hole molding convex portion to cooperate with each other, thereby reducing the contact area between the countersunk hole molding convex portion and the perforated side wall of the molded part in the perforation area, thereby reducing the pulling force of the first molding cavity on the product in the perforation area during the mold opening process.

[0017] 2. The utility model provides an injection molding mold core structure for a car horn cover, and also provides a first plug-in. The shape of the first molding protrusion is consistent with the perforation molding protrusion. By providing a resistance pattern on the side wall of the first molding protrusion, the pulling force of the perforation molding block on the molded product in the perforation area during the mold opening process can be increased, ensuring that the molded product in the perforation area fits the perforation molding block and moves synchronously with the movable template in the mold opening direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view schematic diagram of the speaker cover described in the embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the back side of the speaker cover described in the embodiment of the present application;

[0020] Figure 3 for Figure 2 A partial enlarged view of the area A in the middle circle;

[0021] Figure 4 This is a schematic diagram of the fixed template structure described in an embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the structure of the movable template described in the embodiment of the present application;

[0023] Figure 6 This is a schematic diagram of a perforated forming block according to an embodiment of the present application;

[0024] Figure 7 This is an exploded view of the perforated forming block component described in an embodiment of the present application;

[0025] Figure 8 A diagram showing the position relationship between the sliding plug-in and the molded part described in an embodiment of the present application;

[0026] Fig. 9 This is a schematic diagram of the positional relationship between the plug pin and the molded part described in the embodiment of the present application;

[0027] Fig.10 for Fig. 9 A partial enlarged view of the area in the middle circle B.

[0028] In the figure: 1-speaker cover; 11-plate body; 111-decorative countersunk hole; 112-mounting protrusion; 1121-slot; 113-connecting platform; 1131-vertical plate; 1132-perforation; 1133-plug hole; 12-perforation area; 2-fixed template; 3-movable template; 31-installation slot; 311-water hole; 4-first molding cavity; 41-counter-hole molding protrusion; 5-second molding cavity; 6-perforation molding block; 61-perforation molding protrusion; 62-first plug-in; 621-first molding protrusion; 63-water tank; 7-sliding plug-in; 71-pin. DETAILED DESCRIPTION Example

[0029] A car horn cover injection molding mold core structure, used for Figures 1 to 2 The speaker cover 1 is injection molded, and the speaker cover 1 includes a plate body 11, and one side of the plate body 11 is provided with decorative countersunk holes 111 of preset depth in a grid shape. The plate body 11 is provided with a perforated area 12, and the decorative countersunk holes 111 corresponding to the perforated area 12 pass through the plate body 11.

[0030] Combination Figures 4 to 7 As shown, it includes a fixed mold plate 2 and a movable mold plate 3 corresponding to each other, and the fixed mold plate 2 and the movable mold plate 3 are respectively provided with a first molding cavity 4 and a second molding cavity 5 adapted to the speaker cover 1 on their adjacent surfaces, and the first molding cavity 4 is adapted to the shape of one side of the decorative countersunk hole 111 of the plate body 11, and a group of countersunk molding protrusions 41 are provided on the molding surface of the first molding cavity 4 corresponding to the decorative countersunk hole 111; a perforated molding block 6 is embedded in the area of ​​the movable mold plate 3 corresponding to the second molding cavity 5, and a group of perforated molding protrusions 61 are provided on the molding surface of the perforated molding block 6, The molding surface of the perforation molding block 6 corresponds to the shape of the perforation area 12, and the perforation molding protrusion 61 is adapted to the shape of the perforation in the perforation area 12; a first plug-in 62 is provided on the perforation molding block 6, and a first molding protrusion 621 is provided at the front end of the first plug-in 62. The first plug-in 62 is penetrated on the perforation molding block 6, and the first molding protrusion 621 extends out of the molding surface of the perforation molding block 6. The first molding protrusion 621 is adapted to the shape of the perforation in the perforation area 12, and resistance lines are provided on the side of the first molding protrusion 621.

[0031] Based on the above structure, the principle of the injection molding mold core structure of the automobile horn cover is as follows: a perforation molding block 6 is set on the second molding cavity 5, and the perforation molding protrusion 61 is set to cooperate with the countersunk molding protrusion 41 to complete the molding of the perforation in the perforation area 12, which can reduce the contact area between the countersunk molding protrusion 41 in the perforation area 12 and the perforated side wall of the molded part, thereby reducing the pulling force of the first molding cavity 4 on the product in the perforation area 12 during the mold opening process. In addition, a first plug-in 62 is also set, and the shape of the first molding protrusion 621 is consistent with the perforation molding protrusion 61. By setting a resistance pattern on the side wall of the first molding protrusion 621, the pulling force of the perforation molding block 6 on the molded product in the perforation area 12 during the mold opening process can be increased, ensuring that the molded product in the perforation area 12 is attached to the perforation molding block 6 and the follower template 3 moves synchronously in the mold opening direction. It should be noted that after the mold opening, the molded product as a whole is driven by the ejector plate of the mold to eject the product from the second molding cavity 5, which belongs to conventional technology and will not be described in detail. In this embodiment, the perforated area 12 is circular, and the decorative countersunk holes 111 are honeycomb-shaped.

[0032] In this embodiment, the number of the first molding protrusions 621 is less than or equal to 10, and they are arranged at intervals. Figure 7 As shown, specifically, the number of the first molding protrusions 621 is 5, which are respectively arranged on the 5 first plug-ins 62, and the perforated molding block 6 is provided with a slot adapted to the first plug-in 62. It should be noted that the number of the first molding protrusions 621 is based on the ability to pull the molded product out of the corresponding perforated area 12 from the first molding cavity 4 as a whole. If too many are arranged, on the one hand, the manufacturing cost is increased, and on the other hand, the first molding protrusions 621 will cause the molded product to be pulled out of the mold by the ejector pin during the demoulding process, and the molded product will be deformed.

[0033] Combination Figure 5 As shown, in this embodiment, the movable template 3 is provided with a mounting groove 31 adapted to the shape of the perforated forming block 6, the perforated forming block 6 is installed in the mounting groove 31, the perforated forming block 6 is provided with a water tank 63 on one side near the bottom surface of the mounting groove 31, and the mounting groove 31 is provided with a water hole 311 connected with the water tank 63. Specifically, the perforated forming block 6 is fixed in the mounting groove 31 by screws inserted from the bottom of the mounting groove 31. During demolding, cooling water is passed from the water hole 311 to the water tank 63 to cool the molded part corresponding to the perforated area 12. The molded part shrinks after cooling, resulting in an enlarged perforation aperture of the corresponding perforated area 12, so that the ejector pin can eject the molded part from the second molding cavity 5.

[0034] Combination Figure 5As shown, in this embodiment, the water tank 63 is C-shaped as a whole, the water holes 311 are arranged in pairs at both ends of the water tank 63, and the first plug-in 62 is distributed on both sides of the water tank 63. In this embodiment, specifically, the first plug-in 62 is rod-shaped and inserted into the perforated forming block 6 from the bottom of the perforated forming block 6, and the perforated forming block 6 is correspondingly provided with a slot of a corresponding shape, and the first plug-in 62 is provided with a limiting convex portion at one end away from the first forming convex portion 621. Through the limiting convex portion, the axial position of the first plug-in 62 is limited when the perforated forming block 6 is installed on the mounting groove 31.

[0035] Combination Figure 3 As shown, in this embodiment, a mounting protrusion 112 is provided on the side of the plate body 11 away from the decorative countersunk hole 111, a slot 1121 is provided on the side of the mounting protrusion 112, a connecting platform 113 is provided on the upper end of the mounting protrusion 112, and the connecting platform 113 includes a vertical plate 1131 parallel to the extension direction of the slot 1121, and a through hole 1132 is provided on the vertical plate 1131.

[0036] In the process of injection molding, the molded part with concave and convex shapes on the side often needs to use a slider plug-in to achieve molding. When opening the mold, the slider plug-in is opened laterally by a driver to separate the plug-in from the molded product. The driver is usually a cylinder or an inclined guide rod. In the present application, since the vertical plate 1131 and the slot 1121 extend in the same direction, the perforation 1132 is orthogonal to the extension direction of the slot 1121. Therefore, it is generally necessary to set two plug-ins in orthogonal directions to achieve the molding of the slot 1121 and the perforation 1132. However, since the perforation 1132 and the slot 1121 are compactly arranged, it is difficult to have space on the movable template 3 to set two plug-ins at the same time.

[0037] In order to solve the above problems, combined Figure 8-10As shown, in this embodiment, the movable plate 3 is provided with a sliding plug-in 7 adapted to the slot 1121, and the sliding plug-in 7 can slide in a direction parallel to the extension direction of the slot 1121 through a driving member. The sliding plug-in 7 is provided with a pin 71 adapted to the thickness of the vertical plate 1131, and the side shape of the pin 71 is adapted to the projection shape of the through hole 1132 as a whole; and the connecting platform 113 is provided with a plug hole 1133 corresponding to the pin 71. By providing the pin 71 on the sliding plug-in 7 corresponding to the slot 1121, the thickness of the pin 71 is adapted to the thickness of the vertical plate 1131. During injection molding, the pin 71 enters the connecting platform 113 from the extension direction of the slot 1121 and penetrates the side of the vertical plate 1131. Since the thickness of the pin 71 and the vertical plate 1131 are adapted, a through hole can be formed on the side of the vertical plate 1131, thereby realizing the simultaneous molding of the slot 1121 and the plug hole 1133 with orthogonal extension directions through a sliding plug-in. The insertion hole 1133 on the connecting platform 113 is a molding process hole and has nothing to do with the actual function of the product. In this embodiment, the through hole 1132 is rectangular.

[0038] The technical principle of the present invention is described above in combination with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the protection scope of the present invention in any way. Based on the explanation here, technicians in this field can think of other specific implementation methods of the present invention without creative work, and these methods will fall within the protection scope of the present invention.

Claims

1. A mold core structure for injection molding of a car horn cover, used for injection molding a horn cover (1), the horn cover (1) comprising a plate body (11), one side of the plate body (11) being provided with decorative countersunk holes (111) of a preset depth in a grid-like manner, the plate body (11) being provided with a perforated area (12), and the decorative countersunk holes (111) corresponding to the perforated area (12) passing through the plate body (11); the characteristics are: It comprises a fixed mold plate (2) and a movable mold plate (3) corresponding to each other, wherein a first molding cavity (4) and a second molding cavity (5) adapted to the speaker cover (1) are respectively provided on adjacent surfaces of the fixed mold plate (2) and the movable mold plate (3), wherein the first molding cavity (4) is adapted to the shape of one side of a decorative countersunk hole (111) of a plate body (11), and a group of countersunk hole molding protrusions (41) are provided on the molding surface of the first molding cavity (4) corresponding to the decorative countersunk hole (111); A perforation forming block (6) is embedded in the region of the movable template (3) corresponding to the second forming cavity (5); a group of perforation forming protrusions (61) are provided on the forming surface of the perforation forming block (6); the forming surface of the perforation forming block (6) corresponds to the shape of the perforation region (12); and the perforation forming protrusions (61) are adapted to the shape of the perforations in the perforation region (12); The perforated forming block (6) is provided with a first plug-in (62), a first forming protrusion (621) is provided at the front end of the first plug-in (62), the first plug-in (62) is penetrated by the perforated forming block (6), the first forming protrusion (621) extends out of the forming surface of the perforated forming block (6), the first forming protrusion (621) is adapted to the shape of the perforations in the perforated area (12), and a resistance pattern is provided on the side surface of the first forming protrusion (621).

2. The mold core structure for injection molding of a car horn cover according to claim 1, characterized in that: The number of the first molding protrusions (621) is less than or equal to 10, and they are arranged at intervals from each other.

3. The mold core structure for injection molding of a car horn cover according to claim 1, characterized in that: The movable template (3) is provided with a mounting groove (31) adapted to the shape of the perforated forming block (6); the perforated forming block (6) is installed in the mounting groove (31); a water groove (63) is provided on one side of the perforated forming block (6) near the bottom surface of the mounting groove (31); and a water through hole (311) communicating with the water groove (63) is provided on the mounting groove (31).

4. The mold core structure for injection molding of a car horn cover according to claim 3, characterized in that: The water trough (63) is C-shaped as a whole, the water holes (311) are arranged in pairs at both ends of the water trough (63), and the first plug-in units (62) are distributed on both sides of the water trough (63).

5. The mold core structure for injection molding of a car horn cover according to claim 3, characterized in that: Specifically, the first plug-in (62) is in the shape of a rod and is inserted into the perforated forming block (6) from the bottom of the perforated forming block (6); a slot of a corresponding shape is correspondingly provided on the perforated forming block (6); and a limiting protrusion is provided at one end of the first plug-in (62) away from the first forming protrusion (621).

6. The mold core structure for injection molding of a car horn cover according to claim 1, characterized in that: A mounting protrusion (112) is provided on the plate body (11) at a side away from the decorative countersunk hole (111), a slot (1121) is provided on the side of the mounting protrusion (112), a connecting platform (113) is provided at the upper end of the mounting protrusion (112), the connecting platform (113) comprises a vertical plate (1131) parallel to the extending direction of the slot (1121), and a through hole (1132) is provided on the vertical plate (1131); The movable plate (3) is provided with a sliding plug-in (7) adapted to the slot (1121); the sliding plug-in (7) can slide in a direction parallel to the extension direction of the slot (1121) through a driving member; the sliding plug-in (7) is provided with a plug pin (71) adapted to the thickness of the vertical plate (1131); the side shape of the plug pin (71) is adapted to the projected shape of the through hole (1132); and a plug hole (1133) is provided on the connecting platform (113) corresponding to the plug pin (71).

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