A rubber buckle mold

Abstract

The present invention provides a rubber buckle mold, which includes a plunger plate, an upper template, a middle mold lifting frame, and a lower template arranged in sequence from top to bottom; wherein: a plurality of middle mold grooves are formed by sinking the top end of the middle template, middle mold pieces are arranged in the middle mold grooves, and a plurality of middle mold cavities are formed by sinking the middle mold pieces; upper mold cavities are arranged at positions corresponding to each middle mold cavity at the bottom of the upper template, and glue injection holes communicating with the upper mold cavities are formed on the upper template; in the closed mold state, a plurality of upper mold cavities cooperate with a plurality of middle mold cavities to form a plurality of cavities. The present invention solves the problems of easy deformation of the cavities, mold pressing on the skeleton, and difficult product demolding existing in the current rubber buckle mold.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and particularly to a rubber buckle mold. Background Art

[0002] The rubber buckle product has a skeleton, with a thickness of about 2.8 mm and a special-shaped structure. The existing rubber buckle mold adopts a casting structure with 3 rows of cavity layouts. Due to the relatively thin and long middle mold cavity part of the mold, deformation of the middle mold cavity will occur during mold processing and product production, and the phenomenon of pressing the skeleton is relatively common. Among the original cavities numbered 1 - 24, only a few cavities are in production at present. The product qualification rate is low, the mold cost is high, and the existing mold product is very difficult to demold, and the ejection structure is unreasonable, resulting in cavity deformation. There is an urgent need for a rubber buckle mold with higher productivity. Summary of the Invention

[0003] Based on the technical problems existing in the background art, the present invention proposes a rubber buckle mold.

[0004] A rubber buckle mold proposed by the present invention includes a plunger plate, an upper template, a middle mold lifting frame, and a lower template arranged in sequence from top to bottom; wherein: a plurality of middle mold grooves are formed by sinking the top end of the middle template, middle mold pieces are arranged in each middle mold groove, and a plurality of middle mold cavities are formed by sinking the middle mold pieces up and down; upper mold cavities are arranged at positions corresponding to each middle mold cavity at the bottom of the upper template, and glue injection holes communicating with the upper mold cavities are opened on the upper template; in the closed mold state, a plurality of upper mold cavities cooperate with a plurality of middle mold cavities to form a plurality of cavities.

[0005] Preferably, it further includes an ejection plate. The ejection plate is arranged between the middle mold lifting frame and the lower template and is connected to the middle mold lifting frame through a plurality of shoulder bolts. A through groove is opened at the bottom of the middle mold groove, the ejection plate is provided with ejection blocks extending into the through groove, through holes for ejection are formed through the bottom of each middle mold cavity, sliding holes coaxially arranged with the through holes for ejection are opened at positions corresponding to each ejection block, and a plurality of mounting holes are opened on the side of the ejection block away from the middle mold piece and the plurality of mounting holes communicate with the plurality of sliding holes respectively. Ejection rods are arranged in the mounting holes and the ejection rods pass through the sliding holes and extend into the through holes for ejection, and the top surface of the ejection rod is in the same plane as the bottom surface of the middle mold cavity. Springs sleeved on the ejection rods are arranged in the mounting holes, and gaskets and nuts are connected to the ends of the ejection rods away from the middle mold piece.

[0006] Preferably, a groove is formed by recessing the bottom of the middle mold piece.

[0007] Preferably, in the closed mold state, the top surface of the lower template is in contact with the bottom surface of the middle mold lifting frame, and the top surface of the ejection plate has a clearance fit with the bottom surface of the middle mold lifting frame.

[0008] Preferably, bumps extending into the through grooves are provided at positions corresponding to the through grooves at the top end of the lower template. The top ends of the bumps extend into the grooves and the top surfaces of the bumps are in contact with the bottom surfaces of the grooves. There is a clearance fit between the ejector block and the bumps.

[0009] Preferably, a cover plate pressing against the ejector rod is fixed to the side of the ejector block away from the middle die plate.

[0010] Preferably, the ejector rod includes a cylindrical rod. A screw rod is connected to the bottom end of the cylindrical rod, and a gasket and a nut are connected to the screw rod. A tapered rod is connected to the top end of the cylindrical rod, and the diameter of the tapered rod gradually increases from the end close to the cylindrical rod to the end away from the cylindrical rod.

[0011] Preferably, the ejection hole includes a first tapered hole section, a cylindrical hole section, and a second tapered hole section arranged in sequence from top to bottom. The diameter of the first tapered hole section gradually decreases from the end away from the cylindrical hole section to the end close to the cylindrical hole section. The diameter of the second tapered hole section gradually decreases from the end away from the cylindrical hole section to the end close to the cylindrical hole section. The tapered rod of the ejector rod is arranged in the first tapered hole section, and there is a clearance fit between the cylindrical rod and the cylindrical hole section and the second tapered hole section.

[0012] Preferably, the number of middle die plates is four. Six middle die cavities are provided on each middle die plate. Three ejection holes are opened at the bottom of the middle die cavity, and the three ejection holes are evenly distributed at the bottom of the middle die cavity.

[0013] Preferably, in the closed mold state, the bottom surface of the upper template is in contact with the top surface of the middle die lifting frame and the top surface of the middle die plate.

[0014] A rubber lock mold proposed by the present invention improves the deformation of the template caused by the thin and long middle die cavity by arranging middle die plates on the middle die lifting frame and evenly arranging middle die cavities on the middle die plates. The even distribution of the middle die cavities also takes into account the balance of pressure and injection material during injection molding; the middle die plates and the middle die lifting frame are connected by bolts, so that the middle die can be replaced in time when the cavity is damaged, saving the material of the middle die, reducing the mold cost, improving the production efficiency, and not affecting the production.

[0015] Furthermore, the middle die plate and the middle die lifting frame are connected by bolts, and the ejector plate and the middle die lifting frame are connected by shoulder bolts, so that the middle die plate, the middle die lifting frame, and the ejector plate are integrated; when closing the mold, the upper plane of the lower template coincides with the lower plane of the middle die plate, the top surface of the ejector rod is flush with the bottom surface of the middle die cavity, and the outer peripheral upper plane of the lower template coincides with the lower plane of the middle die lifting frame, so that a 5 mm gap is formed between the ejector plate and the middle die lifting frame; when ejecting the mold, the middle die lifting frame is lifted and separated from the lower template, the middle die lifting frame moves downward, driving the ejector plate to move upward through the shoulder bolts to eject the product; when the downward force disappears, under the action of the spring, the ejector rod and the ejector plate return to their original positions, thereby realizing automatic demolding and ensuring that the product is not deformed.

[0016] In summary, the present invention solves the problems existing in the current rubber buckle mold, such as easy deformation of the cavity, difficulty in pressing the skeleton by the mold, and difficulty in product demolding. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is a schematic structural diagram of a rubber buckle mold proposed by the present invention;

[0018] Figure 2 is Figure 1 a partially enlarged view in;

[0019] Figure 3 FIG. is a schematic structural diagram of a middle mold piece in a rubber buckle mold proposed by the present invention;

[0020] Figure 4 FIG. is a cross-sectional view of a middle mold piece in a rubber buckle mold proposed by the present invention;

[0021] Figure 5 is Figure 4 a partially enlarged view in;

[0022] Figure 6 FIG. is a schematic structural diagram of an upper template in a rubber buckle mold proposed by the present invention;

[0023] Figure 7 FIG. is a schematic structural diagram of a middle mold lifting frame in a rubber buckle mold proposed by the present invention;

[0024] Figure 8 FIG. is a schematic structural diagram of an ejector rod in a rubber buckle mold proposed by the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific embodiments of the present invention will be made with reference to the accompanying drawings of the specification. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0026] Referring to Figures 1-8 , the present invention proposes a rubber buckle mold, which includes a plunger plate 1, an upper template 2, a middle mold lifting frame 3, and a lower template 4 arranged in sequence from top to bottom; wherein:

[0027] Four middle mold grooves 3-1 are formed by sinking at the top of the middle template, and a middle mold piece 5 is connected to each middle mold groove 3-1 by bolts. Six middle mold cavities 5-1 are evenly formed by sinking on the middle mold piece 5;

[0028] At the positions corresponding to each middle mold cavity 5-1 at the bottom of the upper template 2, upper mold cavities 2-1 are provided, and glue injection holes 2-2 communicating with the upper mold cavities 2-1 are formed on the upper template 2;

[0029] In the mold closing state, the bottom surface of the upper template 2 is attached to the top surface of the middle mold lifting frame 3 and the top surface of the middle mold piece 5, the top surface of the lower template 4 is attached to the bottom surface of the middle mold lifting frame 3, and a plurality of upper mold cavities 2-1 cooperate with a plurality of middle mold cavities 5-1 to form a plurality of cavities 6.

[0030] In this embodiment, by arranging the middle mold piece 5 on the middle mold lifting frame 3 and uniformly arranging the middle mold cavities 5-1 on the middle mold piece 5, the template deformation caused by the thin and long middle mold cavities 5-1 is improved, and the uniform distribution of the middle mold cavities 5-1 also takes into account the balance of pressure and injection material during pressure injection; the middle mold piece 5 is connected to the middle mold lifting frame 3 with bolts, and the bolt connection enables timely replacement when the cavity is damaged, saving the material of the middle mold, reducing the mold cost, improving the production efficiency, and not affecting the production.

[0031] Refer to Figure 1 、 Figure 2 In a further embodiment, a ejector plate 7 is further included. The ejector plate 7 is arranged between the middle mold lifting frame 3 and the lower template 4, and the ejector plate 7 is connected to the middle mold lifting frame 3 through a plurality of shoulder bolts. A through groove 3-2 is formed at the bottom of the middle mold groove 3-1. The ejector plate 7 is provided with ejector blocks 7-1 extending into the through groove 3-2. Three ejector holes 5-2 are formed through the bottom of each middle mold cavity 5-1, and the three ejector holes 5-2 are uniformly distributed at the bottom of the middle mold cavity 5-1; at the positions corresponding to each ejector hole 5-2, the ejector blocks 7-1 are provided with sliding holes 7-2 coaxially arranged with the ejector holes 5-2, and a plurality of mounting holes 7-3 are formed on the side of the ejector blocks 7-1 away from the middle mold piece 5, and the plurality of mounting holes 7-3 are respectively communicated with the plurality of sliding holes 7-2. Ejector rods 8 are arranged in the mounting holes 7-3, and the ejector rods 8 pass through the sliding holes 7-2 and extend into the ejector holes 5-2, and the top surfaces of the ejector rods 8 are in the same plane as the bottom surface of the middle mold cavity 5-1. Springs 9 sleeved on the ejector rods 8 are arranged in the mounting holes 7-3, and gaskets 10 and nuts 11 are connected to one end of the ejector rods 8 away from the middle mold piece 5; a cover plate 12 pressing against the ejector rods 8 is fixed on the side of the ejector blocks 7-1 away from the middle mold piece 5.

[0032] Refer to Figure 1 、 Figure 2 、 Figure 4 A groove 5-3 is formed by the depression at the bottom of the middle mold piece 5; in the mold closing state, the top surface of the ejector plate 7 is in clearance fit with the bottom surface of the middle mold lifting frame 3; at the positions corresponding to each through groove 3-2 at the top of the lower template 4, convex blocks 4-1 extending into the through groove 3-2 are provided, the top ends of the convex blocks 4-1 extend into the groove 5-3, and the top surfaces of the convex blocks 4-1 are attached to the bottom surface of the groove 5-3, and the ejector blocks 7-1 are in clearance fit with the convex blocks 4-1;

[0033] The ejector plate 7 and the lower template 4 are in clearance fit. The convex block 4-1 of the lower template 4 is 5 mm higher than the ejector plate 7. The top surface of the convex block 4-1 is in contact with the bottom surface of the middle die plate 5. The ejector rod 8 is in fit with the ejector hole 5-2 of the middle die plate 5. During assembly, the nut 11 is tightened and should not be higher than the bottom plane of the ejector plate 7. Finally, the cover plate 12 is installed by bolt connection.

[0034] The middle die plate 5 and the middle die lifting frame 3 are connected by bolts. The ejector plate 7 and the middle die lifting frame 3 are connected by shoulder bolts. In this way, the middle die plate 5, the middle die lifting frame 3, and the ejector plate 7 are integrated into one body. When the mold is closed, the upper plane of the lower template 4 coincides with the lower plane of the middle die plate 5. The top surface of the ejector rod 8 is flush with the bottom surface of the middle die cavity 5-1. The peripheral upper plane of the lower template 4 coincides with the lower plane of the middle die lifting frame 3. In this way, a 5-mm clearance is formed between the ejector plate 7 and the middle die lifting frame 3. When ejecting the mold, the middle die lifting frame 3 is lifted and separated from the lower template 4. The middle die lifting frame 3 moves downward, driving the ejector plate 7 to move upward through the shoulder bolts. The ejector rod 8 ejects the product. When the downward force disappears, under the action of the spring 10, the ejector rod 8 and the ejector plate 7 return to their original positions, thus realizing automatic demolding and ensuring that the product does not deform.

[0035] Refer to Figure 5 、 Figure 8 In a further embodiment, the ejector rod 8 includes a cylindrical rod. A screw rod is connected to the bottom end of the cylindrical rod, and a gasket 10 and a nut 11 are connected to the screw rod. A tapered rod is connected to the top end of the cylindrical rod, and the diameter of the tapered rod gradually increases from the end close to the cylindrical rod to the end far from the cylindrical rod. The ejector hole 5-2 includes a first tapered hole section, a cylindrical hole section, and a second tapered hole section arranged in sequence from top to bottom. The diameter of the first tapered hole section gradually decreases from the end far from the cylindrical hole section to the end close to the cylindrical hole section. The diameter of the second tapered hole section gradually decreases from the end far from the cylindrical hole section to the end close to the cylindrical hole section. The tapered rod of the ejector rod 8 is arranged in the first tapered hole section, and the cylindrical rod is in clearance fit with the cylindrical hole section and the second tapered hole section.

[0036] The top end of the ejector rod 8 is designed as a tapered rod, and a small clearance fit is adopted between the cylindrical rod and the middle die plate. In this way, the overflow of the rubber material can be effectively reduced. The tapered rod can make the up-and-down movement fit more closely and easily. The method of covering the ejector rod 8 with a cover plate is adopted, which is convenient for the replacement of the ejector rod 8. Since the diameter of the ejector rod 8 is relatively thin, the length of the ejector rod 8 should be shortened as much as possible during design to ensure the coaxiality and perpendicularity of the ejector rod 8 and is also convenient for processing.

[0037] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A rubber snap-lock mold, characterized in that, It includes a plugging plate (1), an upper template (2), a middle mold lifting frame (3), and a lower template (4) arranged in sequence from top to bottom; Among them: a number of middle mold grooves (3-1) are formed by sinking at the top end of the middle template. Middle mold pieces (5) are arranged in each middle mold groove (3-1). Multiple middle mold cavities (5-1) are formed by sinking in the middle mold pieces (5); upper mold cavities (2-1) are arranged at positions corresponding to each middle mold cavity (5-1) at the bottom of the upper template (2). Glue injection holes (2-2) communicating with the upper mold cavities (2-1) are opened on the upper template (2); in the mold closing state, multiple upper mold cavities (2-1) cooperate with multiple middle mold cavities (5-1) to form multiple cavities (6); It also includes an ejector plate (7). The ejector plate (7) is arranged between the middle mold lifting frame (3) and the lower template (4), and the ejector plate (7) is connected to the middle mold lifting frame (3) through a number of shoulder bolts. A through groove (3-2) is opened at the bottom of the middle mold groove (3-1). The ejector plate (7) is provided with ejector blocks (7-1) extending into the through groove (3-2). Ejector holes (5-2) are penetrated and opened at the bottom of each middle mold cavity (5-1). Slide holes (7-2) coaxially arranged with the ejector holes (5-2) are opened at positions corresponding to each ejector hole (5-2) on the ejector blocks (7-1). Multiple mounting holes (7-3) are opened on the side of the ejector blocks (7-1) away from the middle mold pieces (5), and the multiple mounting holes (7-3) are respectively communicated with the multiple slide holes (7-2). Ejector rods (8) are arranged in the mounting holes (7-3), and the ejector rods (8) pass through the slide holes (7-2) and extend into the ejector holes (5-2). And the top surface of the ejector rods (8) is in the same plane as the bottom surface of the middle mold cavity (5-1). Springs (9) sleeved on the ejector rods (8) are arranged in the mounting holes (7-3), and gaskets (10) and nuts (11) are connected to one end of the ejector rods (8) away from the middle mold pieces (5).

2. The rubber snap-lock mold according to claim 1, characterized in that, A groove (5-3) is formed by depression at the bottom of the middle mold piece (5).

3. The rubber snap-lock mold according to claim 1 or 2, characterized in that, In the mold closing state, the top surface of the lower template (4) is attached to the bottom surface of the middle mold lifting frame (3), and the top surface of the ejector plate (7) is in clearance fit with the bottom surface of the middle mold lifting frame (3).

4. The rubber snap-lock mold according to claim 2, characterized in that, Convex blocks (4-1) extending into the through grooves (3-2) are arranged at positions corresponding to each through groove (3-2) at the top end of the lower template (4). The top ends of the convex blocks (4-1) extend into the grooves (5-3), and the top surfaces of the convex blocks (4-1) are attached to the bottom surfaces of the grooves (5-3). The ejector blocks (7-1) are in clearance fit with the convex blocks (4-1).

5. The rubber snap-lock mold according to claim 1 or 2, characterized in that, A cover plate (12) pressing against the ejector rod (8) is fixed on the side of the ejector block (7-1) away from the middle mold piece (5).

6. The rubber snap-lock mold according to claim 1, characterized in that, The ejector rod (8) includes a cylindrical rod. A screw rod is connected to the bottom end of the cylindrical rod, and a gasket (10) and a nut (11) are connected. A conical rod is connected to the top end of the cylindrical rod, and the diameter of the conical rod gradually increases from the end close to the cylindrical rod to the end away from the cylindrical rod.

7. The rubber snap-lock mold according to claim 6, characterized in that, The ejection hole (5-2) includes a first tapered hole section, a cylindrical hole section, and a second tapered hole section that are arranged in sequence from top to bottom. The diameter of the first tapered hole section gradually decreases from the end far away from the cylindrical hole section to the end close to the cylindrical hole section. The diameter of the second tapered hole section gradually decreases from the end far away from the cylindrical hole section to the end close to the cylindrical hole section. The tapered rod of the ejection rod (8) is arranged in the first tapered hole section, and the cylindrical rod has a clearance fit with the cylindrical hole section and the second tapered hole section.

8. The rubber snap-lock mold according to claim 1 or 2, characterized in that, The number of the middle die plates (5) is set to four, and 6 middle die cavities (5-1) are arranged on each middle die plate (5). Three ejection holes (5-2) are opened at the bottom of the middle die cavity (5-1), and the three ejection holes (5-2) are evenly distributed at the bottom of the middle die cavity (5-1).

9. The rubber snap-lock mold according to any one of claims 1-2, characterized in that, In the mold closing state, the bottom surface of the upper template (2) is attached to the top surface of the middle mold lifting frame (3) and the top surface of the middle die plate (5).

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