Injection mold of flat plate shell

Abstract

The utility model discloses an injection mold for a flat plate shell, which comprises an upper mold and a lower mold, the upper mold is arranged on the top side of the lower mold, a cooling mechanism is arranged in the upper mold, a demolding assembly is arranged on the peripheral side of the cooling mechanism, and the demolding assembly comprises a plurality of round holes with T-shaped cross sections. After cooling and shaping of the flat plate shell injection molding part are completed through the cooling mechanism, injection of water in the upper mold is stopped, a negative pressure cavity can be formed in an opening in the bottom end of the round hole, and therefore the flat plate shell injection molding part is adsorbed and fixed to the upper mold from multiple positions on the top side of the flat plate shell injection molding part; the flat plate shell injection molding part is taken out of the lower mold through separation of the upper mold and the lower mold, and due to the fact that the flat plate shell injection molding part abuts against the lower mold shell and the opening area of the bottom end of the round hole is small, the flat plate shell injection molding part cannot deform to cause damage to the flat plate shell injection molding part.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold for a flat shell. Background Art

[0002] Injection molds are important tools in the plastic processing industry. They are used to manufacture various plastic products. They have the characteristics of high precision, high efficiency and high degree of automation. The principle is generally to inject molten plastic into the mold, and then obtain plastic products of the desired shape after cooling and solidification.

[0003] For example, an injection mold for a flat shell with a publication number of CN213035229U includes an injection mold body, a drive motor and a servo motor, the side of the injection mold body is fixedly connected to a limited slide groove, the side of the injection mold body is fixedly connected to a dust shielding plate, the surface of the first internal threaded sleeve is fixedly connected to a sixth bevel gear, the interior of the mold base is inserted with a second internal threaded sleeve, and the surface of the second internal threaded sleeve is fixedly connected to a seventh bevel gear. The utility model is provided with a pick-up pallet and a servo motor, and the first threaded rod and the second threaded rod can be extended and retracted by the rotation of the servo motor, so that the pick-up pallet can be raised and lowered, and the flat shell in the injection mold body can be lifted up, and the airflow generated by the rotation of the cooling fan is blown onto the inner wall of the injection mold body, which can accelerate the cooling of the injection mold body.

[0004] The demolding of the existing injection mold is generally carried out by pushing the injection molded part out of the mold through the push rod arranged inside. However, when the upper shell of the tablet shell is injection molded, since the upper shell is hollow inside and the thickness is often thin, when the push rod is used to push the upper shell out, part of the upper shell is subjected to greater force, which may cause deformation and damage to part of the upper shell. Utility Model Content

[0005] The purpose of the utility model is to provide an injection mold for a flat shell, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an injection mold for a flat shell, comprising an upper mold and a lower mold, the upper mold being arranged on the top side of the lower mold, a cooling mechanism being provided in the upper mold, a demolding assembly being provided on the outer peripheral side of the cooling mechanism, the demolding assembly comprising a plurality of circular holes with a T-shaped cross-section, the plurality of circular holes being relatively opened at positions in the upper mold corresponding to the top opening of the lower mold, and a connecting hole being opened at the position in the upper mold corresponding to the circular hole, the interior of the opening at one end of the connecting hole being communicated with the interior of the corresponding circular hole, and a sealing mechanism being provided in the circular hole.

[0007] Preferably, the center of the lower mold is hollow, the bottom of the upper mold is inserted into the inner hole of the lower mold and contacts the inner hole wall of the lower mold, and the bottom corners of the upper mold are arc-shaped.

[0008] Preferably, the cooling mechanism includes a plurality of heat-conducting mesh plates, a rectangular groove is opened in the upper mold, and the rectangular groove is located between a plurality of circular holes, the plurality of heat-conducting mesh plates are divided into two groups and are relatively arranged in the rectangular groove, and the spacing between two adjacent heat-conducting mesh plates in each group is equal, the upper and lower sides of the heat-conducting mesh plates are fixedly connected to the inner wall of the rectangular groove, the top side of the upper mold is relatively connected and equipped with two water inlet pipes, and the two water inlet pipes are relatively arranged on both sides of the two groups of heat-conducting mesh plates, the top side of the upper mold is connected and equipped with a drain pipe, and the drain pipe is located between the two groups of heat-conducting mesh plates.

[0009] Preferably, the sealing mechanism includes a piston plate, which is arranged in the corresponding circular hole, and the outer peripheral wall of the piston plate is in contact with the inner wall of the corresponding circular hole, one end of the connecting hole is located on the top side of the corresponding piston plate, the interior of the opening at the other end of the connecting hole is communicated with the interior of the rectangular groove, and a round rod is fixedly installed on the bottom side of the piston plate, and the outer peripheral wall of the round rod is in contact with the inner wall of the bottom end opening of the corresponding circular hole.

[0010] Preferably, a spring is provided between the piston plate and the inner wall of the corresponding circular hole, and two ends of the spring are fixedly connected to the bottom side of the corresponding piston plate and the inner wall of the corresponding circular hole respectively.

[0011] Preferably, a limiting ring is sleeved on the outer peripheral side of the spring, and the outer peripheral wall of the limiting ring is fixedly connected to the inner wall of the corresponding circular hole, and the limiting ring is located below the corresponding piston plate.

[0012] The utility model has at least the following beneficial effects:

[0013] 1. When the injection mold of the improved flat shell is used, water is continuously injected into the upper mold through the cooling mechanism, so that a large amount of flowing water is stored in the upper mold, and then the raw material is quickly cooled and shaped through heat conduction between the raw material, the lower mold, the upper mold and the water flow, and the raw material cooling rate is relatively fast;

[0014] 2. According to the above, after the cooling and shaping of the flat-panel shell injection molded part is completed by the cooling mechanism, the injection of water in the upper mold is stopped, so that a negative pressure cavity can be formed in the opening at the bottom end of the circular hole, so that the flat-panel shell injection molded part is adsorbed and fixed on the upper mold from multiple positions on the top side of the flat-panel shell injection molded part, so that the flat-panel shell injection molded part is brought out of the lower mold through the separation between the upper mold and the lower mold, and because the flat-panel shell injection molded part and the lower mold shell are in conflict with each other, and the opening area at the bottom end of the circular hole is small, the flat-panel shell injection molded part will not be deformed, resulting in damage to the flat-panel shell injection molded part. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is an overall schematic diagram of the utility model;

[0017] Figure 2 For this utility model Figure 1 Schematic diagram of the overall structure when the middle and upper mold is inverted;

[0018] Figure 3 It is a front view of the internal structure of the upper mold of the utility model;

[0019] Figure 4 For this utility model Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0020] In the figure: 1. upper mold; 2. lower mold; 3. cooling mechanism; 31. rectangular groove; 32. heat-conducting mesh plate; 33. water inlet pipe; 34. drain pipe; 4. demoulding assembly; 41. round hole; 42. connecting hole; 43. blocking mechanism; 431. piston plate; 432. round rod; 433. limit ring; 434. spring. DETAILED DESCRIPTION

[0021] In order to make the technical solution and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0022] The utility model provides a technical solution: Figure 1-4 The utility model discloses an injection mold for a flat shell, comprising an upper mold 1 and a lower mold 2, the upper mold 1 is arranged on the top side of the lower mold 2, a cooling mechanism 3 is arranged in the upper mold 1, a demoulding component 4 is arranged on the outer peripheral side of the cooling mechanism 3, the demoulding component 4 comprises a plurality of circular holes 41 with a T-shaped cross-section, the plurality of circular holes 41 are relatively opened at positions corresponding to the top opening of the lower mold 2 in the upper mold 1, and a connecting hole 42 is opened at the position corresponding to the circular hole 41 in the upper mold 1, the interior of the opening at one end of the connecting hole 42 is communicated with the interior of the corresponding circular hole 41, and a blocking mechanism 43 is arranged in the circular hole 41.

[0023] In this embodiment, when the injection mold of the improved flat shell is used, water flow is continuously injected into the upper mold 1 through the cooling mechanism 3, so that a large amount of flowing water is stored in the upper mold 1, and the blocking mechanism 43 is synchronously driven to block the bottom opening of the circular hole 41, and then the external raw material injection device injects a specific amount of raw material into the injection mold through the injection interface of the lower mold 2. At this time, due to the blocking of the bottom opening of the circular hole 41, the raw material will not flow into the circular hole 41. At the same time, the raw material is quickly cooled and shaped through heat conduction between the raw material, the lower mold 2, the upper mold 1 and the water flow. Then, the injection of water into the upper mold 1 is stopped, and a negative pressure cavity is automatically formed in the opening at the bottom end of the circular hole 41, so that the flat-panel shell injection molded part is adsorbed and fixed on the upper mold 1 at multiple positions on the top side of the flat-panel shell injection molded part, and then the flat-panel shell injection molded part is directly brought out of the lower mold 2 through the separation between the upper mold 1 and the lower mold 2. Since the flat-panel shell injection molded part and the outer shell of the lower mold 2 are in mutual conflict, and the opening area at the bottom end of the circular hole 41 is small, the flat-panel shell injection molded part will not be deformed to cause damage to the flat-panel shell injection molded part. At this time, the operator can directly remove the flat-panel shell injection molded part from the upper mold 1.

[0024] In a further preferred embodiment of the present invention, Figure 2 and Figure 3 As shown, the center of the lower mold 2 is hollow, and the bottom of the upper mold 1 is inserted into the inner hole of the lower mold 2 and contacts the inner hole wall of the lower mold 2, and the bottom corners of the upper mold 1 are arc-shaped;

[0025] In this embodiment, after the upper mold 1 and the lower mold 2 are closed, the bottom of the upper mold 1 is directly inserted into the lower mold 2, thereby greatly increasing the contact surface between the upper mold 1 and the lower mold 2, so that heat conduction between the upper mold 1 and the lower mold 2 can be carried out more quickly.

[0026] In a further preferred embodiment of the present invention, Figure 3 As shown, the cooling mechanism 3 includes a plurality of heat-conducting mesh plates 32, a rectangular groove 31 is opened in the upper mold 1, and the rectangular groove 31 is located between the plurality of circular holes 41, the plurality of heat-conducting mesh plates 32 are divided into two groups and are relatively arranged in the rectangular groove 31, and the spacing between two adjacent heat-conducting mesh plates 32 in each group is equal, the upper and lower sides of the heat-conducting mesh plates 32 are fixedly connected to the inner wall of the rectangular groove 31, the top side of the upper mold 1 is relatively connected and equipped with two water inlet pipes 33, and the two water inlet pipes 33 are relatively arranged on both sides of the two groups of heat-conducting mesh plates 32, and the top side of the upper mold 1 is connected and equipped with a drain pipe 34, and the drain pipe 34 is located between the two groups of heat-conducting mesh plates 32;

[0027] In this embodiment, after the upper mold 1 and the lower mold 2 form an injection mold, the external water cooling device continuously injects water into the rectangular groove 31 through the water inlet pipe 33, and then returns to the water cooling device through the drain pipe 34, and the heat conduction between the water flow and the heat conductive mesh plate 32, the upper mold 1 and the lower mold 2 can continuously cool the injection mold, and at this time, due to the limited water flow passing through the holes of the heat conductive mesh plate 32, high-pressure chambers are formed at both ends of the rectangular groove 31;

[0028] The provision of the heat-conducting mesh plate 32 can greatly increase the contact area between the water flow and the upper mold 1, so that the heat conduction between the water flow and the upper mold 1 can be carried out more quickly;

[0029] It should be noted that the water inlet end of the water inlet pipe 33 is connected to the water outlet end of the external water cooling device, and the water outlet end of the water outlet pipe 34 is connected to the water inlet end of the external water cooling device.

[0030] In a further preferred embodiment of the present invention, Figure 3 and Figure 4 As shown, the blocking mechanism 43 includes a piston plate 431, which is arranged in the corresponding circular hole 41, and the outer peripheral wall of the piston plate 431 contacts the inner wall of the corresponding circular hole 41, one end of the connecting hole 42 is located at the top side of the corresponding piston plate 431, and the interior of the opening at the other end of the connecting hole 42 is communicated with the interior of the rectangular groove 31, and a round rod 432 is fixedly installed on the bottom side of the piston plate 431, and the outer peripheral wall of the round rod 432 contacts the inner wall of the bottom end opening of the corresponding circular hole 41;

[0031] In this embodiment, after high-pressure cavities are formed at both ends of the above-mentioned rectangular groove 31, part of the water flows into the circular hole 41 through the connecting hole 42, thereby pushing the piston plate 431 downward, and then automatically adjusting the position of the round rod 432, so that the round rod 432 automatically completes the sealing of the bottom opening of the circular hole 41, so that a completed plane is formed on the bottom side of the upper mold 1, and the operator does not need to perform other operations.

[0032] In a further preferred embodiment of the present invention, Figure 4 As shown, a spring 434 is provided between the piston plate 431 and the inner wall of the corresponding circular hole 41, and the two ends of the spring 434 are fixedly connected to the bottom side of the corresponding piston plate 431 and the inner wall of the corresponding circular hole 41 respectively;

[0033] In this embodiment, when the piston plate 431 moves downward, the compression of the spring 434 can be completed synchronously. When the water injection into the rectangular groove 31 is stopped, the high pressure state at both ends of the rectangular groove 31 gradually disappears due to the discharge of water. At this time, due to the push of the piston plate 431 by the spring 434, the piston plate 431 automatically moves up and resets, and pushes the water in the circular hole 41 back into the rectangular groove 31. In the process of moving upward, the piston plate 431 will synchronously pull the round rod 432 to move up and retract into the circular hole 41, thereby forming a negative pressure cavity in the bottom opening of the circular hole 41, and an adsorption force is applied by various positions on the top side of the flat-panel shell injection molded part, thereby pulling the flat-panel shell injection molded part to be adsorbed and fixed on the upper mold 1, and the operator does not need to perform other operations.

[0034] In a further preferred embodiment of the present invention, Figure 4 As shown, a limiting ring 433 is sleeved on the outer peripheral side of the spring 434, and the outer peripheral wall of the limiting ring 433 is fixedly connected to the inner wall of the corresponding circular hole 41, and the limiting ring 433 is located below the corresponding piston plate 431;

[0035] In this embodiment, when the piston plate 431 moves downward, the round rod 432 is driven to move downward synchronously with the piston rod until the piston plate 431 and the limiting ring 433 collide with each other. After the piston plate 431 and the limiting ring 433 collide with each other, the piston plate 431 will not continue to move downward due to the constraint of the limiting ring 433, and at this time the round rod 432 just fills the bottom opening of the circular hole 41, so that the bottom side of the upper mold 1 forms a completed plane, avoiding the round rod 432 from extending out of the circular groove to affect the use of the injection mold.

[0036] Working principle: When the injection mold of the improved flat shell is used, first, the external water cooling device continuously injects water into the rectangular groove 31 from the water inlet pipe 33, and then returns to the water cooling device from the drain pipe 34, and the heat conduction between the water flow and the heat conductive mesh plate 32, the upper mold 1 and the lower mold 2 can continuously cool the injection mold. At this time, due to the limited water flow through the mesh plate holes, high-pressure chambers are formed at both ends of the rectangular groove 31, and part of the water flows into the circular hole 41 from the connecting hole 42, so that a high-pressure chamber is formed in the circular hole 41 at the same time, and the piston plate 431 is pushed downward to compress the spring 434, and the round rod 432 is driven to follow the piston rod synchronously. Move downward, after the piston plate 431 and the limiting ring 433 collide with each other, the piston plate 431 will not continue to move downward due to the constraint of the limiting ring 433, and at this time the round rod 432 just fills the bottom opening of the round hole 41, so that the bottom side of the upper mold 1 forms a complete plane, and then the upper mold 1 and the lower mold 2 are closed to form a complete injection mold. The operator injects a specific amount of raw material into the injection mold through the injection interface of the lower mold 2 according to the existing injection mold usage method, that is, an external raw material injection device, and then quickly cools and shapes the raw material through heat conduction between the raw material and the upper mold 1 and the lower mold 2, thereby forming a flat shell injection molded part;

[0037] After the raw material is cooled and shaped, the amount of water injected into the rectangular groove 31 is gradually reduced until the water injection into the rectangular groove 31 stops. At this time, the high pressure state at both ends of the rectangular groove 31 is released, and due to the push of the spring 434 on the piston plate 431, the piston plate 431 automatically moves up and resets, and pushes the water in the circular hole 41 back into the rectangular groove 31. In the process of moving up, the piston plate 431 will simultaneously pull the round rod 432 up and retract into the circular hole 41, so that a negative pressure cavity is formed in the bottom opening of the circular hole 41, and the various positions on the top side of the flat shell injection molded part are The upper mold 1 is provided with an adsorption force, thereby pulling the flat shell injection molded part to be adsorbed and fixed on the upper mold 1. Subsequently, when the upper mold 1 is separated from the lower mold 2, the flat shell injection molded part is directly pulled out of the lower mold 2. At this time, the external water cooling device re-injects water into the rectangular groove 31, thereby releasing the negative pressure state in the bottom opening of the circular hole 41 through the downward movement of the round rod 432. At this time, the operator can directly remove the flat shell injection molded part from the upper mold 1, and then re-close the upper mold 1 and the lower mold 2. According to the above repeated operations, the flat shell injection molded part can be continuously manufactured;

[0038] It should be noted that before closing the upper mold 1 and the lower mold 2 , a release agent is applied to the inner wall of the groove of the lower mold 2 and the corresponding position on the bottom side of the upper mold 1 to make it easier for the injection molded part to be separated from the upper mold 1 and the lower mold 2 .

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. The utility model may be subject to various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An injection mold for a flat housing, comprising an upper mold (1) and a lower mold (2), characterized in that: The upper mold (1) is arranged on the top side of the lower mold (2), a cooling mechanism (3) is arranged in the upper mold (1), a demoulding assembly (4) is arranged on the outer peripheral side of the cooling mechanism (3), and the demoulding assembly (4) comprises a plurality of circular holes (41) with a T-shaped cross-section, the plurality of circular holes (41) are relatively opened at positions in the upper mold (1) corresponding to the top openings of the lower mold (2), and a connecting hole (42) is opened at a position in the upper mold (1) corresponding to the circular hole (41), the interior of one end opening of the connecting hole (42) is communicated with the interior of the corresponding circular hole (41), and a blocking mechanism (43) is arranged in the circular hole (41).

2. The injection mold for a tablet housing according to claim 1, characterized in that: The center of the lower mold (2) is hollow, and the bottom of the upper mold (1) is inserted into the inner hole of the lower mold (2) and contacts the inner hole wall of the lower mold (2), and the bottom corners of the upper mold (1) are arc-shaped.

3. The injection mold for a tablet housing according to claim 2, characterized in that: The cooling mechanism (3) comprises a plurality of heat-conducting mesh plates (32). A rectangular groove (31) is provided in the upper mold (1), and the rectangular groove (31) is located between the plurality of circular holes (41). The plurality of heat-conducting mesh plates (32) are divided into two groups and are arranged in the rectangular groove (31) in a relative manner, and the spacing between two adjacent heat-conducting mesh plates (32) in each group is equal. The upper and lower sides of the heat-conducting mesh plates (32) are fixedly connected to the inner wall of the rectangular groove (31). Two water inlet pipes (33) are relatively connected and installed on the top side of the upper mold (1), and the two water inlet pipes (33) are relatively arranged on the two sides of the two groups of heat-conducting mesh plates (32). A drainage pipe (34) is connected and installed on the top side of the upper mold (1), and the drainage pipe (34) is located between the two groups of heat-conducting mesh plates (32).

4. The injection mold for a tablet housing according to claim 3, characterized in that: The blocking mechanism (43) comprises a piston plate (431), wherein the piston plate (431) is arranged in the corresponding circular hole (41), and the outer peripheral wall of the piston plate (431) contacts the inner wall of the corresponding circular hole (41); one end of the connecting hole (42) is located on the top side of the corresponding piston plate (431), and the interior of the opening at the other end of the connecting hole (42) is communicated with the interior of the rectangular groove (31); a round rod (432) is fixedly mounted on the bottom side of the piston plate (431), and the outer peripheral wall of the round rod (432) contacts the inner wall of the bottom end opening of the corresponding circular hole (41).

5. The injection mold for a tablet housing according to claim 4, characterized in that: A spring (434) is provided between the piston plate (431) and the inner wall of the corresponding circular hole (41), and two ends of the spring (434) are respectively fixedly connected to the bottom side of the corresponding piston plate (431) and the inner wall of the corresponding circular hole (41).

6. The injection mold for a tablet housing according to claim 5, characterized in that: A limiting ring (433) is sleeved on the outer peripheral side of the spring (434), and the outer peripheral wall of the limiting ring (433) is fixedly connected to the inner wall of the corresponding circular hole (41), and the limiting ring (433) is located below the corresponding piston plate (431).

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