Sprue cutting mechanism of injection molding machine

Abstract

The utility model provides a sprue cut-off mechanism of an injection molding machine, which relates to the technical field of injection molding processing, and comprises a platform plate, a mold is arranged above the platform plate, the mold comprises an upper mold plate and a lower mold plate, a cut-off device is arranged on the upper surface of the platform plate, the cut-off device comprises a vertical plate fixed on the upper surface of the platform plate, and the vertical plate is fixed on the upper surface of the platform plate. A notch is formed in the side face of the vertical plate, a lifting plate is arranged on the left side of the vertical plate, the lifting plate is slidably connected with the vertical plate through the notch, and a first electric push rod is fixed to the left side of the lifting plate. According to the sprue cut-off mechanism of the injection molding machine, by arranging the upper mold plate and the lower mold plate, during cut-off operation, the upper mold plate and the lower mold plate are kept still so as to maintain the stability of a finished product, meanwhile, a cutter is arranged to cut off an injection molding opening, and meanwhile, the cutter is in close contact with a groove through the elastic force of an auxiliary spring; the stability of injection molding melt is not affected while the injection molding sprue is cut off.

Description

Technical Field

[0001] The utility model relates to a gate truncation mechanism, in particular to a gate truncation mechanism of an injection molding machine, and belongs to the technical field of injection molding processing. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. Injection molding is a processing method used when mass-producing some parts with complex shapes. Specifically, it means injecting the heat-melted material into the mold cavity under high pressure, and after cooling and solidifying, the molded product is obtained. The advantages of the injection molding method are fast production speed and high efficiency, and it is suitable for mass production and molding processing fields of products with complex shapes. After injection molding, it is necessary to truncate the injection gate to facilitate the aesthetics of the product during subsequent demolding.

[0003] An injection mold with a gate truncation mechanism disclosed in the Chinese Patent Application Publication Specification CN216400415U truncates the injection port by driving a truncation knife through the movement of the upper mold on the upper surface of the lower mold. It has a good truncation effect. However, in order to make the molten plastic injected into the lower mold fit the bottom of the upper mold, enough molten plastic needs to be injected into the lower mold. At this time, when the upper mold seals the lower mold and drives the truncation knife to truncate the injection port, the front surface of the upper mold will push the molten plastic in the lower mold, causing some molten plastic to overflow and resulting in waste of the molten plastic.

[0004] When the above patent is in use, during the movement of the upper mold on the upper surface of the lower mold, the truncation knife is driven to truncate the injection port, which has a good truncation effect. However, in order to make the molten plastic injected into the lower mold fit the bottom of the upper mold, enough molten plastic needs to be injected into the lower mold. At this time, when the upper mold seals the lower mold and drives the truncation knife to truncate the injection port, the front surface of the upper mold will push the molten plastic in the lower mold, causing some molten plastic to overflow and resulting in waste of the molten plastic. Summary of the Utility Model

[0005] The utility model provides a gate truncation mechanism of an injection molding machine, which can complete the truncation of the injection gate without affecting the stability of the injection melt.

[0006] The utility model is realized through the following technical solutions: A gate truncation mechanism of an injection molding machine includes a platform plate, a mold is arranged above the platform plate, the mold includes an upper template and a lower template, and a truncation device is arranged on the upper surface of the platform plate;

[0007] The truncating device includes a vertical plate fixed to the upper surface of the platform plate. A notch is formed on the side surface of the vertical plate. A lifting plate is arranged on the left side of the vertical plate. The lifting plate is slidably connected to the vertical plate through the notch. A first electric push rod is fixed to the left side of the lifting plate. A baffle is fixed to the output end of the first electric push rod. A groove is formed on the upper surface of the upper template. An injection port is formed on the inner bottom wall of the groove. A cutting knife corresponding to the groove is installed on the left side surface of the baffle.

[0008] The length of the cutting knife is less than the length of the groove, and the size of the baffle is larger than the size of the groove. The baffle can block the cutting knife to prevent the cutting knife from continuously penetrating into the groove and touching the upper template, causing damage to the upper template and the cutting knife.

[0009] The truncating device further includes two track plates arranged on the upper surface of the upper template. Two inserting plates are hinged to the side surface of the baffle. The inserting plates are slidably connected to the track plates. The movement of the inserting plates is limited by the track plates, so as to prevent the cutting knife from rubbing against the side wall of the groove when entering the groove, thereby avoiding damage to the upper template or the cutting knife.

[0010] An auxiliary spring is installed on the bottom surface of the lifting plate. The bottom end of the auxiliary spring is fixed to the platform plate. The elastic force of the auxiliary spring can push the lifting plate to move and make the cutting knife closely contact the groove, preventing the cut surface from being uneven when the cutting knife performs the truncating operation.

[0011] A chamber is formed on the upper surface of the platform plate. A gear is rotatably connected to the inner bottom wall of the chamber. Two toothed plates are slidably connected to the side wall of the chamber. The toothed plates are meshed with the gear. A second electric push rod is installed on the inner wall of the chamber. The output end of the second electric push rod is fixed to the toothed plate through a connecting block. A clamping plate is fixed to the upper surface of the toothed plate. The movement of the toothed plate drives the clamping plate to move, and the lower template is clamped and fixed by the clamping plate.

[0012] A connecting plate is fixed to the side surface of the upper template. A sliding plate is slidably connected to the bottom surface of the platform plate. The sliding plate is fixed to the connecting plate. The movement of the sliding plate drives the connecting plate to move, and then drives the upper template to move.

[0013] A fixing plate is fixed to the bottom surface of the platform plate. The connecting plate penetrates through the fixing plate. A motor is installed on the bottom surface of the platform plate. The output end of the motor is installed with a threaded rod. The other end of the threaded rod is rotatably connected to the fixing plate. The threaded rod penetrates through the sliding plate and is threadedly connected to the sliding plate.

[0014] The present utility model provides a gate truncating mechanism for an injection molding machine, and the beneficial effects thereof are as follows:

[0015] 1. The gate cutting mechanism of this injection molding machine sets an upper template and a lower template. During the cutting operation, the upper template and the lower template remain stationary to maintain the stability of the finished product. At the same time, a cutter is set to cut the injection gate, and the cutter is tightly in contact with the groove by relying on the elastic force of the auxiliary spring, achieving the injection gate cutting without affecting the stability of the injection melt.

[0016] 2. The gate cutting mechanism of this injection molding machine drives a toothed plate to move by setting a gear, so that the toothed plate can drive a clamping plate to move, and the clamping plate can clamp the mold. The position of the clamping plate can be adjusted by the rotation of the gear, maintaining the stability of molds of different sizes during the injection process. Description of the Drawings

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 2 It is a top view of the injection gate of the present utility model;

[0019] Figure 3 It is a structural schematic diagram at the position of the toothed plate of the present utility model;

[0020] Figure 4 It is a side view of the sliding plate of the present utility model;

[0021] Figure 5 It is an unfolded effect diagram of the upper template of the present utility model.

[0022] Description of the Reference Numerals

[0023] 1. Platform plate; 2. Mold; 3. Cutting device;

[0024] 201. Upper template; 202. Lower template;

[0025] 301. Vertical plate; 302. Lifting plate; 303. First electric push rod; 304. Baffle; 305. Injection gate; 306. Cutter; 307. Track plate; 308. Insert plate; 309. Auxiliary spring;

[0026] 4. Gear; 5. Toothed plate; 6. Second electric push rod; 7. Clamping plate; 8. Connecting plate; 9. Sliding plate; 10. Fixed plate; 11. Motor; 12. Threaded rod. Detailed Embodiment

[0027] Please refer to Figures 1 to 5 , an embodiment of the present utility model provides a gate cutting mechanism for an injection molding machine, including a platform plate 1, a mold 2 is arranged above the platform plate 1, the mold 2 includes an upper template 201 and a lower template 202, and a cutting device 3 is arranged on the upper surface of the platform plate 1.

[0028] The truncating device 3 includes a vertical plate 301 fixed to the upper surface of the platform plate 1. A notch is provided on the side surface of the vertical plate 301. A lifting plate 302 is arranged on the left side of the vertical plate 301. The lifting plate 302 is slidably connected to the vertical plate 301 through the notch. A first electric push rod 303 is fixed to the left side of the lifting plate 302. The output end of the first electric push rod 303 is fixed with a baffle 304. A groove is provided on the upper surface of the upper template 201. An injection port 305 is provided on the inner bottom wall of the groove. A cutter 306 corresponding to the groove is installed on the left side surface of the baffle 304.

[0029] Please refer particularly to Figure 1 、 Figure 2 and Figure 4 that the length of the cutter 306 is less than the length of the groove, and the size of the baffle 304 is greater than the size of the groove. The baffle 304 can block the cutter 306 to prevent the cutter 306 from continuously penetrating into the groove and touching the upper template 201, causing damage to the upper template 201 and the cutter 306. The truncating device 3 further includes two track plates 307 arranged on the upper surface of the upper template 201. Two insertion plates 308 are hinged to the side surface of the baffle 304. The insertion plates 308 are slidably connected to the track plates 307. The movement of the insertion plates 308 is limited by the track plates 307, so as to prevent the cutter 306 from rubbing against the side wall of the groove when advancing in the groove, thus avoiding damage to the upper template 201 or the cutter 306.

[0030] Please refer particularly to Figure 2 、 Figure 3 and Figure 4 that an auxiliary spring 309 is installed on the bottom surface of the lifting plate 302. The bottom end of the auxiliary spring 309 is fixed to the platform plate 1. The elastic force of the auxiliary spring 309 can push the lifting plate 302 to move and make the cutter 306 closely contact the groove, preventing the cut surface from being uneven when the cutter 306 performs the truncating operation. A chamber is provided on the upper surface of the platform plate 1. A gear 4 is rotatably connected to the inner bottom wall of the chamber. Two toothed plates 5 are slidably connected to the side wall of the chamber. The toothed plates 5 are meshed with the gear 4. A second electric push rod 6 is installed on the inner wall of the chamber. The output end of the second electric push rod 6 is fixed to the toothed plate 5 through a connecting block. A clamping plate 7 is fixed to the upper surface of the toothed plate 5. The clamping plate 7 is driven to move by the movement of the toothed plate 5, and the lower template 202 is clamped and fixed by the clamping plate 7.

[0031] Please refer particularly to Figure 2 、 Figure 3 and Figure 4, a connecting plate 8 is fixed to the side of the upper template 201, a sliding plate 9 is slidably connected to the bottom surface of the platform plate 1, the sliding plate 9 is fixed to the connecting plate 8, the movement of the sliding plate 9 drives the connecting plate 8 to move, thereby driving the upper template 201 to move. A fixing plate 10 is fixed to the bottom surface of the platform plate 1, the connecting plate 8 penetrates through the fixing plate 10, a motor 11 is installed on the bottom surface of the platform plate 1, an output end of the motor 11 is provided with a threaded rod 12, the other end of the threaded rod 12 is rotatably connected to the fixing plate 10, and the threaded rod 12 penetrates through the sliding plate 9 and is threadedly connected to the sliding plate 9.

[0032] Working principle: First, place the mold 2 on the platform plate 1, start the second electric push rod 6, the output end of the second electric push rod 6 drives the toothed plate 5 to move, the movement of the toothed plate 5 drives the gear 4 to rotate, the rotation of the gear 4 drives another toothed plate 5 to move synchronously, and the movement of the two toothed plates 5 drives the clamping plate 7 to move, completing the clamping of molds 2 of different sizes and preventing the mold 2 from shaking during the cutting operation, which affects the cutting effect.

[0033] Then pull the lifting plate 302 upward. After the lifting plate 302 rises, rotate the insertion plate 308 to align the insertion plate 308 with the track plate 307. Then start the first electric push rod 303. Due to the diversion of the insertion plate 308 by the track plate 307, when the electric push rod drives the baffle 304 to move, the cutting knife 306 always aligns with the groove. Driven by the first electric push rod 303, the cutting knife 306 enters the groove and reaches the position of the injection port 305, completing the cutting operation.

[0034] During the cutting operation, the upper template 201 and the lower template 202 remain stationary to maintain the stability of the finished product. Relying on the elastic force of the auxiliary spring 309, the cutting knife 306 is in close contact with the groove, realizing the cutting of the injection gate without affecting the stability of the injection melt.

[0035] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A gate cutting mechanism for an injection molding machine, comprising a platform plate (1), characterized in that: Above the platform plate (1), there is a mold (2). The mold (2) includes an upper template (201) and a lower template (202). On the upper surface of the platform plate (1), there is a cutting device (3). The cutting device (3) includes a vertical plate (301) fixed on the upper surface of the platform plate (1). A notch is formed on the side surface of the vertical plate (301). On the left side of the vertical plate (301), there is a lifting plate (302). The lifting plate (302) is slidably connected to the vertical plate (301) through the notch. A first electric push rod (303) is fixed on the left side of the lifting plate (302). The output end of the first electric push rod (303) is fixed with a baffle (304). A groove is formed on the upper surface of the upper template (201), and an injection port (305) is formed on the inner bottom wall of the groove. A cutting knife (306) corresponding to the groove is installed on the left side surface of the baffle (304).

2. The gate truncation mechanism of an injection molding machine according to claim 1, wherein: The length of the cutting knife (306) is less than the length of the groove, and the size of the baffle (304) is greater than the size of the groove.

3. The gate cutting mechanism of an injection molding machine according to claim 1, wherein: The cutting device (3) further includes two track plates (307) arranged on the upper surface of the upper template (201). Two insertion plates (308) are hinged to the side surface of the baffle (304). The insertion plates (308) are slidably connected to the track plates (307).

4. The gate cutting mechanism of an injection molding machine according to claim 1, characterized in that: An auxiliary spring (309) is installed on the bottom surface of the lifting plate (302). The bottom end of the auxiliary spring (309) is fixed to the platform plate (1).

5. The gate cutting mechanism of an injection molding machine according to claim 1, characterized in that: A chamber is formed on the upper surface of the platform plate (1). A gear (4) is rotatably connected to the inner bottom wall of the chamber. Two toothed plates (5) are slidably connected to the side wall of the chamber. The toothed plates (5) are meshed with the gear (4). A second electric push rod (6) is installed on the inner wall of the chamber. The output end of the second electric push rod (6) is fixed to the toothed plate (5) through a connecting block. A clamping plate (7) is fixed on the upper surface of the toothed plate (5).

6. The gate cutting mechanism of an injection molding machine according to claim 1, characterized in that: A connecting plate (8) is fixed to the side surface of the upper template (201). A sliding plate (9) is slidably connected to the bottom surface of the platform plate (1). The sliding plate (9) is fixed to the connecting plate (8).

7. The gate cutting mechanism of an injection molding machine according to claim 6, characterized in that: A fixing plate (10) is fixed to the bottom surface of the platform plate (1). The connecting plate (8) passes through the fixing plate (10). A motor (11) is installed on the bottom surface of the platform plate (1). The output end of the motor (11) is installed with a threaded rod (12). The other end of the threaded rod (12) is rotatably connected to the fixing plate (10). The threaded rod (12) passes through the sliding plate (9) and is threadedly connected to the sliding plate (9).

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