Plastic mold with automatic demolding function

Abstract

The utility model relates to the technical field of plastic molds, in particular to a plastic mold with an automatic demolding function, which comprises a lower mold main body, an upper connecting groove, a lower mold main body and a lower connecting groove, a plurality of clamping blocks are arranged on the upper mold main body; the die has the beneficial effects that the upper die body moves upwards to be separated from the lower die body, the spring is loosened to push the lower die body and the limiting rod to move upwards along the limiting hole, a baffle fixedly connected to the top plate is separated from the through hole, and an air cavity formed by a sealing gasket, a connecting plate and a lower connecting groove communicates with the through hole; gas in a gas cavity formed by the sealing gasket, the connecting plate and the lower connecting groove upwards pushes a workpiece attached to the lower mold body through the through hole to eject the workpiece out, and in the whole demolding process, demolding of the workpiece is achieved only in a gas pushing mode, and metal structures such as an ejector pin are not used as an ejection mechanism. The workpiece is prevented from being scratched in the demolding process, the percent of pass of products produced by the device is increased, and the production efficiency of a production line is improved.

Description

Technical Field

[0001] The utility model relates to the field of plastic molds, in particular to a plastic mold with an automatic demoulding function. Background Art

[0002] Plastic molds are tools for producing plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and then cooling and solidifying to obtain a molded product.

[0003] In the prior art, a plastic product produced by a plastic mold is solidified and attached to the plastic mold. An automatic demoulding structure on the mold is required to eject the plastic product, and then a worker takes out the plastic product.

[0004] However, plastic molds with automatic demoulding functions usually use nail pins to eject plastic products in the mold. The nail pins are easy to scratch the surface of the plastic products during the ejection process, causing scratches on the surface of the plastic products, reducing the product qualification rate and affecting the production efficiency of the production line. Utility Model Content

[0005] The purpose of the utility model is to provide a plastic mold with an automatic demoulding function to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solutions: a plastic mold with an automatic demoulding function, the plastic mold with an automatic demoulding function comprises: a lower mold body, an upper connecting groove is provided on the lower mold body, a lower connecting groove is provided on the bottom surface of the lower mold body, and a plurality of limit rods are provided on the lower mold body;

[0007] The upper mold body is provided with a plurality of clamping blocks.

[0008] Preferably, a ventilation plate is provided in the upper connecting groove, the ventilation plate is fixedly connected to the outer heat dissipation ring, and heat dissipation holes are opened on the outer heat dissipation ring.

[0009] Preferably, the other end of the limit rod is arranged in a limit hole opened on the base, the limit rod can move up and down along the limit hole, the limit rod is fixedly connected to the lower mold body, a spring is sleeved on the limit rod, one end of the spring is fixedly connected to the lower mold body, and the other end of the spring is fixedly connected to the base.

[0010] Preferably, the card block is in a square plate-like structure, the card block is fixedly connected to the upper mold body, and the card block can be inserted into a card slot provided on the outer heat dissipation ring, and the card slot is in a square groove-like structure.

[0011] Preferably, a connecting plate is fixedly connected to the base, a top plate is fixedly connected to the base, a sealing gasket is fixedly connected to the side of the connecting plate, one end of the connecting plate and the sealing gasket is stuck in a lower connecting groove opened at the bottom of the lower mold body, and the connecting plate and the sealing gasket can move up and down along the lower connecting groove.

[0012] Preferably, the top plate is a square plate structure, and the baffle fixedly connected to the top plate can be inserted into the through hole opened on the lower mold body. The top plate is fixedly connected to the connecting plate, and an exhaust hole is opened on the connecting plate. The exhaust hole is communicated with the air cavity in the connecting plate, and the air cavity in the connecting plate is connected to an external air pump through a tube.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a plastic mold with automatic demoulding function. When the plastic product between the lower mold body and the upper mold body is cooled and formed, the upper mold body moves upward and separates from the lower mold body. The spring relaxes and pushes the lower mold body and the limiting rod to move upward along the limiting hole, so that the baffle fixedly connected on the top plate is separated from the through hole, so that the air cavity formed by the sealing gasket, the connecting plate and the lower connecting groove is communicated with the through hole, and the gas flows into the air cavity in the outer heat dissipation ring through the through hole to the hole opened on the upper connecting groove. The flowing gas cools the outer heat dissipation ring and then cools the workpiece on the lower mold body. The above structures cooperate with each other to accelerate the cooling of the workpiece and facilitate demoulding of the workpiece. The gas in the air cavity formed by the sealing gasket, the connecting plate and the lower connecting groove pushes the workpiece attached to the lower mold body upward through the through hole, and the workpiece is ejected from the lower mold body. In the entire demoulding process, the demoulding of the workpiece is achieved only by gas pushing, and no metal structure such as an ejector pin is used as an ejection mechanism, so that the workpiece is prevented from being scratched during the demoulding process, and the qualified rate of the product produced by the device is improved, and the practicability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0017] Figure 3 It is a schematic diagram of the local structure of the utility model;

[0018] Figure 4 for Figure 3 The enlarged structural diagram at B in the middle;

[0019] Figure 5 It is a partial structural schematic diagram of the utility model;

[0020] Figure 6 It is a schematic diagram of the internal structure of the utility model.

[0021] In the figure: 1. lower mold body; 2. upper mold body; 3. limit rod; 4. outer heat dissipation ring; 5. upper connecting groove; 6. through hole; 7. lower connecting groove; 8. clamping block; 9. clamping slot; 10. heat dissipation hole; 11. ventilation plate; 12. connecting plate; 13. base; 14. sealing gasket; 15. spring; 16. top plate; 17. baffle; 18. exhaust hole; 19. limit hole. DETAILED DESCRIPTION

[0022] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1

[0024] See also Figure 1-Figure 6 The utility model provides a technical solution: a plastic mold with an automatic demoulding function, the plastic mold with an automatic demoulding function comprises: a lower mold body 1, an upper connecting groove 5 is opened on the lower mold body 1, a lower connecting groove 7 is opened on the bottom surface of the lower mold body 1, and a plurality of limit rods 3 are arranged on the lower mold body 1; an upper mold body 2, and a plurality of clamping blocks 8 are arranged on the upper mold body 2;

[0025] During specific use, after the lower mold body 1 is separated from the upper mold body 2, the gas in the air cavity formed by the sealing gasket 14, the connecting plate 12 and the lower connecting groove 7 pushes the workpiece attached to the lower mold body 1 upward through the through hole 6, and ejects the workpiece from the lower mold body 1.

[0026] Embodiment 2

[0027] On the basis of the first embodiment, in order to improve the demoulding efficiency of the device, a limiting rod 3 is provided, the other end of the limiting rod 3 is provided in a limiting hole 19 provided on the base 13, the limiting rod 3 can move up and down along the limiting hole 19, the limiting rod 3 is fixedly connected to the lower mold body 1, a spring 15 is sleeved on the limiting rod 3, one end of the spring 15 is fixedly connected to the lower mold body 1, and the other end of the spring 15 is fixedly connected to the base 13. When the plastic product between the lower mold body 1 and the upper mold body 2 is cooled and formed, the upper mold body 2 moves upward to separate from the lower mold body 1. The mold body 1, the spring 15 is relaxed to push the lower mold body 1 and the limiting rod 3 to move upward along the limiting hole 19, the base 13 is fixedly connected with a connecting plate 12, the base 13 is fixedly connected with a top plate 16, the side of the connecting plate 12 is fixedly connected with a sealing gasket 14, and one end of the connecting plate 12 and the sealing gasket 14 is stuck in the lower connecting groove 7 opened at the bottom of the lower mold body 1, and the connecting plate 12 and the sealing gasket 14 can move up and down along the lower connecting groove 7, so that the baffle 17 fixedly connected to the top plate 16 fixedly connected to the connecting plate 12 is separated from the lower mold body 1 The through hole 6 provided on the mold body 1 enables the air cavity formed by the sealing gasket 14, the connecting plate 12 and the lower connecting groove 7 to communicate with the through hole 6. The top plate 16 is a square plate-shaped structure. The baffle 17 fixedly connected to the top plate 16 can be inserted into the through hole 6 provided on the lower mold body 1. The top plate 16 is fixedly connected to the connecting plate 12. The connecting plate 12 is provided with an exhaust hole 18, which is communicated with the air cavity in the connecting plate 12. The air cavity in the connecting plate 12 is connected to an external air pump through a tube, and the external air pump injects air into the cavity in the connecting plate 12 through the tube. The gas, the exhaust hole 18 is a circular hole structure, the gas enters the air cavity formed by the sealing gasket 14, the connecting plate 12 and the lower connecting groove 7 through the exhaust hole 18, and then pushes the workpiece attached to the lower mold body 1 outward through the through hole 6 opened on the lower mold body 1, so that the workpiece is automatically demolded without manual demolding, and the workpiece is demolded only by pneumatic means in the entire demolding process, and no metal structure such as a ejector pin is used to eject the workpiece, which avoids the workpiece from being scratched during the demolding process, thereby improving the qualified rate of the products produced by the device.

[0028] Embodiment 3

[0029] On the basis of the second embodiment, in order to improve the use effect of the device, a card block 8 is provided. The card block 8 is in a square plate-like structure. The card block 8 is fixedly connected to the upper mold body 2. The card block 8 can be inserted into the card slot 9 provided on the outer heat dissipation ring 4. The card slot 9 is in a square groove-like structure. When the upper mold body 2 is pressed down onto the lower mold body 1, the card block 8 is just stuck in the card slot 9 to block the heat dissipation hole 10, thereby preventing the material in the flowing state in the mold cavity between the upper mold body 2 and the lower mold body 1 from flowing into the heat dissipation hole 10. A ventilation plate 11 is provided in the upper connecting groove 5. The ventilation plate 11 is fixedly connected to the outer heat dissipation ring 4. The outer heat dissipation ring 4 is provided with heat dissipation holes 10. A circular hole is provided at one end of the ventilation plate 11 close to the through hole 6, and the circular hole is communicated with the inner cavity of the outer heat dissipation ring 4. The heat dissipation hole 10 is communicated with the inner cavity of the outer heat dissipation ring 4. When the upper mold body 2 is separated from the lower mold body 1, the spring 15 pushes the lower mold body 1 to move upward. The baffle 17 is a circular plate-like structure, and the through hole 6 is a circular groove-like structure, so that the baffle 17 is separated from the through hole 6, so that the air cavity formed by the sealing gasket 14, the connecting plate 12 and the lower connecting groove 7 is communicated with the through hole 6. The gas can flow into the air cavity in the outer heat dissipation ring 4 through the hole opened on the upper connecting groove 5. The outer heat dissipation ring 4 is made of metal and can absorb the heat generated by the workpiece. The flowing gas can take away the heat on the outer heat dissipation ring 4, thereby cooling the workpiece on the lower mold body 1. The hot gas can eventually flow out through the heat dissipation hole 10. The above structures cooperate with each other to accelerate the cooling of the workpiece and facilitate the demolding of the workpiece.

[0030] In actual use, when the plastic product between the lower mold body 1 and the upper mold body 2 is cooled and formed, the upper mold body 2 moves upward and separates from the lower mold body 1, and the spring 15 relaxes to push the lower mold body 1 and the limiting rod 3 to move upward along the limiting hole 19, so that the baffle 17 fixedly connected to the top plate 16 is separated from the through hole 6, so that the air cavity formed by the sealing gasket 14, the connecting plate 12 and the lower connecting groove 7 is connected to the through hole 6, and the gas flows through the through hole 6 to the hole opened on the upper connecting groove 5 and then flows into the air cavity in the outer heat dissipation ring 4, and the flowing gas cools the outer heat dissipation ring 4 , and then the workpiece on the lower mold body 1 is cooled down. The above structures cooperate with each other to accelerate the cooling of the workpiece and facilitate demoulding of the workpiece. The gas in the air cavity formed by the sealing gasket 14, the connecting plate 12 and the lower connecting groove 7 pushes the workpiece attached to the lower mold body 1 upward through the through hole 6, and the workpiece is ejected from the lower mold body 1. During the entire demoulding process, the demoulding of the workpiece is achieved only by gas pushing, and no metal structure such as an ejector pin is used as an ejection mechanism, which avoids the workpiece from being scratched during the demoulding process, improves the qualified rate of the products produced by the device, and has high practicality.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic mold with automatic demoulding function, characterized in that: The plastic mold with automatic demoulding function comprises: a lower mold body (1), an upper connecting groove (5) is provided on the lower mold body (1), a lower connecting groove (7) is provided on the bottom surface of the lower mold body (1), and a plurality of limit rods (3) are provided on the lower mold body (1); An upper mold body (2), wherein a plurality of clamping blocks (8) are arranged on the upper mold body (2); The top plate (16) is in a square plate-shaped structure. A baffle (17) fixedly connected to the top plate (16) can be inserted into a through hole (6) provided on the lower mold body (1). The top plate (16) is fixedly connected to the connecting plate (12). An exhaust hole (18) is provided on the connecting plate (12). The exhaust hole (18) is communicated with an air cavity in the connecting plate (12). The air cavity in the connecting plate (12) is connected to an external air pump through a tube.

2. The plastic mold with automatic demoulding function according to claim 1, characterized in that: A ventilation plate (11) is arranged in the upper connection groove (5), and the ventilation plate (11) is fixedly connected to the outer heat dissipation ring (4), and the outer heat dissipation ring (4) is provided with a heat dissipation hole (10).

3. The plastic mold with automatic demoulding function according to claim 1, characterized in that: The other end of the limiting rod (3) is arranged in a limiting hole (19) provided on the base (13); the limiting rod (3) can move up and down along the limiting hole (19); the limiting rod (3) is fixedly connected to the lower mold body (1); a spring (15) is sleeved on the limiting rod (3); one end of the spring (15) is fixedly connected to the lower mold body (1), and the other end of the spring (15) is fixedly connected to the base (13).

4. The plastic mold with automatic demoulding function according to claim 1, characterized in that: The clamping block (8) is in the form of a square plate. The clamping block (8) is fixedly connected to the upper mold body (2). The clamping block (8) can be clamped into a clamping groove (9) provided on the outer heat dissipation ring (4). The clamping groove (9) is in the form of a square groove.

5. The plastic mold with automatic demoulding function according to claim 3, characterized in that: The base (13) is fixedly connected to a connecting plate (12), the base (13) is fixedly connected to a top plate (16), the side of the connecting plate (12) is fixedly connected to a sealing gasket (14), one end of the connecting plate (12) and the sealing gasket (14) are clamped in a lower connecting groove (7) provided at the bottom of the lower mold body (1), and the connecting plate (12) and the sealing gasket (14) can move up and down along the lower connecting groove (7).

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