Injection mold for demolding by using gas cap

Abstract

The utility model discloses an injection mold for demolding by using a gas cap, and belongs to the field of injection molds. The utility model relates to an injection mold for demolding by utilizing a gas cap, which comprises a top plate, an upper mold, a lower mold and a gas cap, the lower mold is arranged on the lower side of the upper mold; the bottom plate is arranged on the lower side of the lower mold; the core mold is arranged on the lower mold; the air supply pipe is arranged on the core mold and the lower mold; the air supply valve is arranged in the air supply pipe; an ejector rod is arranged in the air supply pipe in the core mold in a sliding manner; the ejector head is fixedly arranged at the upper end of the ejector rod; the limiting plate is fixedly arranged on the ejector rod; the mounting disc is arranged on the lower mold; the tension spring is fixedly arranged between the mounting disc and the limiting plate; ejection pressure is dispersed through uniform acting force provided by the gas cap, so that traces caused by overlarge local stress of an injection molding part are avoided, the surface quality of the injection molding part is improved, and the injection molding part is effectively prevented from being damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field especially utilizes the injection mold of air top demoulding. BACKGROUND

[0002] Injection mold is a kind of tool for producing plastic parts and plastic products, and is also the tool for giving plastic parts and plastic products complete structure and accurate size, and injection molding is a kind of processing method used when mass producing some complex parts, and in the field of injection molding, the demolding process of injection mold is very important.

[0003] At present, many injection molds simply adopt the mode of ejector rod demolding when demolding, and this traditional demolding mode has obvious defects, since the force of ejector rod on injection part is concentrated in local position when ejector rod demolding, which can easily cause damage to injection part, produce ejector rod marks on the surface of injection part, affect the appearance quality and quality of product, and reduce the market competitiveness of product. UTILITY MODEL CONTENT

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of prior art, and provide an injection mold utilizing air top demolding, which can overcome the above problems or at least partially solve the above problems.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An injection mold utilizing air top demolding, comprising: a top plate, further comprising: an upper mold arranged on the top plate; a lower mold arranged on the lower side of the upper mold; a bottom plate arranged on the lower side of the lower mold; a core mold arranged on the lower mold; a gas supply pipe arranged on the core mold and the lower mold; a gas supply valve arranged in the gas supply pipe; a top rod slidingly arranged in the gas supply pipe in the core mold; a top head fixedly arranged on the upper end of the top rod; a limiting plate fixedly arranged on the top rod; a mounting disc arranged on the lower mold; and a tension spring fixedly arranged between the mounting disc and the limiting plate.

[0007] In order to discharge hot gas, further, an exhaust pipe is arranged in the lower mold and the core mold, a second electric telescopic rod is fixedly connected in the exhaust pipe in the core mold, and a sealing head is fixedly connected to the top of the second electric telescopic rod.

[0008] In order to prevent the action force of the top rod from being too large, further, a sealing groove is arranged on one side of the lower mold, a sealing rod matched with the limiting plate is sealingly and slidingly connected in the sealing groove, a first electric telescopic rod is fixedly connected on one side of the lower mold, and the output end of the first electric telescopic rod is fixedly connected with the sealing rod.

[0009] In order to facilitate the improvement of its sealing effect, further, the mounting disc is detachably connected with the lower mold through a third bolt, and a sealing gasket is fixedly connected on the mounting disc.

[0010] Preferably, the lower mold is fixedly connected with the bottom plate through a first bolt.

[0011] Further, the core mold is fixedly connected with the lower mold through a second bolt.

[0012] Compared with the prior art, the injection mold provided by the utility model has the following beneficial effects:

[0013] 1. The injection mold using gas top demolding, through the gas supply pipe to the core mold, the gas pressure pushes the ejector rod to slide upward in the gas supply pipe, the ejector rod drives the ejector head to lift the injection part upward, and when the ejector rod rises, the gas in the gas supply pipe enters between the injection part and the core mold, so that the demolding can be completed under the action of the gas pressure, the traces of the injection part are prevented, and the processing quality of the injection part is effectively improved.

[0014] 2. The injection mold using gas top demolding, through the gas top combined with the ejector rod, compared with the simple ejector rod demolding, the uniform force provided by the gas top disperses the ejection pressure, avoids the traces of the injection part caused by the local excessive force, and improves the surface quality of the injection part.

[0015] 3. The injection mold using gas top demolding, through the first electric telescopic rod to push the sealing rod to slide in the sealing groove, the limiting plate is limited, when the ejector rod rises to a certain position, the limiting plate contacts the sealing rod, the limiting plate is clamped, and the ejector rod is kept at the current position, so that the damage of the injection part caused by excessive lifting is prevented, after the first electric telescopic rod is stretched out, the second electric telescopic rod is controlled to drive the sealing head to shrink, at this time, the gas between the injection part and the core mold is discharged through the exhaust pipe, so that the injection part is effectively cooled, after the set time is opened, the second electric telescopic rod is controlled to stretch out and drive the sealing head to block the exhaust pipe, the first electric telescopic rod is controlled to drive the sealing rod to reset, at this time, the demolding is completed, and the damage of the injection part is further effectively prevented.

[0016] The parts not involved in the device are the same as or can be realized by the prior art, the utility model provides the uniform force dispersed by the gas top, avoids the traces of the injection part caused by the local excessive force, improves the surface quality of the injection part, and effectively prevents the damage of the injection part. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The utility model provides a kind of injection mold using gas top demolding of structure schematic view for the utility model;

[0018] Figure 2 A cross section of the injection mold using gas top demolding is shown in the utility model Figure One ;

[0019] Figure 3 The injection mold using gas top demolding is shown in the utility model Figure 2 An enlarged view of position A in the injection mold using gas top demolding is shown in the utility model

[0020] Figure 4 A cross section of the injection mold using gas top demolding is shown in the utility model Figure Two ;

[0021] Figure 5 The injection mold using gas top demolding is shown in the utility model Figure 4 An enlarged view of position B in the injection mold using gas top demolding is shown in the utility model

[0022] In the figure: 1, top plate; 101, upper mold; 2, bottom plate; 201, lower mold; 202, first bolt; 203, gas supply pipe; 204, gas supply valve; 205, sealing gasket; 3, core mold; 301, second bolt; 302, ejector pin; 303, ejector head; 304, limit plate; 305, mounting disc; 306, third bolt; 307, tension spring; 308, sealing groove; 309, sealing rod; 310, first electric telescopic rod; 4, exhaust pipe; 401, second electric telescopic rod; 402, sealing head. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0024] Embodiment 1: refer to Figures 1-5 An injection mold using gas top demolding, comprising: a top plate (1), further comprising: an upper mold (101) arranged on the top plate (1); a lower mold (201) arranged on the lower side of the upper mold (101); a bottom plate (2) arranged on the lower side of the lower mold (201); a core mold (3) arranged on the lower mold (201); a gas supply pipe (203) arranged on the core mold (3) and the lower mold (201); a gas supply valve (204) arranged in the gas supply pipe (203); an ejector pin (302) arranged in the gas supply pipe (203) in the core mold (3) in a sliding manner; an ejector head (303) fixedly arranged on the upper end of the ejector pin (302); a limit plate (304) fixedly arranged on the ejector pin (302); a mounting disc (305) arranged on the lower mold (201); and a tension spring (307) fixedly arranged between the mounting disc (305) and the limit plate (304).

[0025] When the injection molding is performed, the upper mold (101) and the lower mold (201) are closed, and then the injection material is injected into the mold cavity, and the core mold (3) is used for molding, wherein the injection pipe is not shown in the figure.

[0026] When the injection molding is performed, the upper mold (101) and the lower mold (201) are closed, and then the injection material is injected into the mold cavity, and the core mold (3) is used for molding, wherein the injection pipe is not shown in the figure.

[0027] It should be noted that the external gas supply mechanism is connected with the gas supply pipe (203).

[0028] The gas top combined with the ejector rod (302) is used for demolding, compared with the ejector rod (302) demolding, the uniform force provided by the gas top disperses the ejection pressure, avoids the traces caused by the local excessive force of the injection molding, and improves the surface quality of the injection molding.

[0029] Embodiment 2: Refer to Figures 1-5 An injection mold using gas top demolding, basically the same as embodiment 1, further, the lower mold 201 and the core mold 3 are provided with the exhaust pipe 4, the second electric telescopic rod 401 is fixedly connected in the exhaust pipe 4 in the core mold 3, and the sealing head 402 is fixedly connected at the top of the second electric telescopic rod 401.

[0030] One side of the lower mold 201 is provided with a sealing groove 308, the sealing rod 309 matched with the limiting plate 304 is sealingly and slidably connected in the sealing groove 308, the first electric telescopic rod 310 is fixedly connected on one side of the lower mold 201, and the output end of the first electric telescopic rod 310 is fixedly connected with the sealing rod 309.

[0031] When the ejector rod 302 moves upward, the sealing rod 309 is pushed to slide in the sealing groove 308 by the first electric telescopic rod 310, and the limiting plate 304 is limited, when the ejector rod 302 rises to a certain position, the limiting plate 304 contacts with the sealing rod 309, the limiting plate 304 is clamped, and the ejector rod 302 is kept at the current position, so as to prevent the damage caused by excessive lifting of the injection molding.

[0032] After the first electric telescopic rod 310 is stretched out, the second electric telescopic rod 401 is controlled to drive the sealing head 402 to shrink, at this time, the gas entering between the injection molding part and the core mold 3 is discharged through the exhaust pipe 4, thereby effectively cooling the injection molding part, after the set time is opened, the second electric telescopic rod 401 is controlled to stretch out and drive the sealing head 402 to block the exhaust pipe 4, the first electric telescopic rod 310 is controlled to drive the sealing rod 309 to reset, at this time, the demolding is completed, and the injection molding part is further effectively prevented from being damaged.

[0033] The mounting disc 305 is detachably connected with the lower mold 201 through the third bolt 306, and the sealing gasket 205 is fixedly connected on the mounting disc 305.

[0034] The lower mold 201 is fixedly connected with the bottom plate 2 through the first bolt 202.

[0035] The core mold 3 is fixedly connected with the lower mold 201 through the second bolt 301.

[0036] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An injection mold utilizing gas knockout, comprising: A top plate (1), characterized in that it further comprises: An upper die (101) arranged on the top plate (1); A lower die (201) arranged on the lower side of the upper die (101); A bottom plate (2) arranged on the lower side of the lower die (201); A core mold (3) arranged on the lower die (201); A gas supply pipe (203) arranged on the core mold (3) and the lower die (201); A gas supply valve (204) arranged in the gas supply pipe (203); A top rod (302) slidingly arranged in the gas supply pipe (203) in the core mold (3); A top head (303) fixedly arranged on the upper end of the top rod (302); A limiting plate (304) fixedly arranged on the top rod (302); A mounting disc (305) arranged on the lower die (201); A tension spring (307) fixedly arranged between the mounting disc (305) and the limiting plate (304).

2. An injection mold utilizing gas knockout according to claim 1, wherein An exhaust pipe (4) is arranged in the lower die (201) and the core mold (3), a second electric telescopic rod (401) is fixedly connected in the exhaust pipe (4) in the core mold (3), and a sealing head (402) is fixedly connected to the top of the second electric telescopic rod (401).

3. An injection mold utilizing gas knockout according to claim 2, wherein A sealing groove (308) is arranged on one side of the lower die (201), a sealing rod (309) matched with the limiting plate (304) is sealingly and slidingly connected in the sealing groove (308), a first electric telescopic rod (310) is fixedly connected to one side of the lower die (201), and the output end of the first electric telescopic rod (310) is fixedly connected with the sealing rod (309).

4. An injection mold utilizing gas knockout according to claim 1, wherein The mounting disc (305) is detachably connected with the lower die (201) through a third bolt (306), and a sealing gasket (205) is fixedly connected to the mounting disc (305).

5. An injection mold utilizing gas knockout according to claim 1, wherein The lower die (201) is fixedly connected with the bottom plate (2) through a first bolt (202).

6. An injection mold utilizing gas knockout according to claim 1, wherein The core mold (3) is fixedly connected with the lower die (201) through a second bolt (301).

Images