Building block toy injection mold convenient to demold

Abstract

The utility model belongs to the technical field of building block toys, and particularly relates to a building block toy injection mold convenient to demold, which comprises a fixed plate, first hydraulic telescopic rods are symmetrically arranged on one side of the fixed plate, a push plate is arranged at the output ends of the first hydraulic telescopic rods, and a mold base is arranged on one side, far away from the fixed plate, of the push plate. A male die is arranged on the side, away from the push plate, of the die holder, ejector rods are arranged on the four side edges, corresponding to the male die, of the side, close to the push plate, of the fixing plate and penetrate through the push plate and the die holder, and a cylindrical cavity is formed in the inner side of the male die. Meanwhile, when the output end of a second hydraulic telescopic rod retracts, a top ring jacks a ball towards the outer side, the ball jacks a top block through a movable rod, the top block jacks the building block outwards, a gap is formed between the building block and the male die, the gas rapidly spreads through the gap, and therefore negative pressure is eliminated; at the moment, the first hydraulic telescopic rod drives the push plate to retract, the ejector rod ejects out relative to the mold base, the building blocks are ejected off, and certain damage to the building blocks caused by powerful ejection of the ejector rod is effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of building block toys, and in particular relates to an injection mold for building block toys which is convenient for demoulding. Background Art

[0002] Some Lego building block toys are made by injection molding. Common Lego building blocks have a main body block with a plug-in column on one side of the main body block and a cavity on the side of the main body block away from the plug-in column. When assembling, the plug-in column and the cavity are plugged together. When this type of Lego building blocks are injection molded, after the plastic melt is formed, the building blocks are quickly cooled down by a cooling device, and then the punch takes the building blocks away from the die, and then the building blocks are ejected by the ejector pin. However, the punch generally passes through the cavity all the way to the inside of the plug-in column. After rapid cooling, the building blocks will tightly wrap the punch, and due to the extrusion of air, there is negative pressure on the contact surface between the punch and the building blocks. Directly ejecting with the ejector pin can easily cause deformation of the building blocks, especially when the building blocks are relatively thin. Forceful ejection may even cause the plug-in columns of the building blocks to be negatively sucked, depressed, or even broken. Utility Model Content

[0003] In view of the above problems, the purpose of the utility model is to provide an injection mold for building block toys which is easy to demold, so as to solve the problem that after the plastic melt is formed, the building blocks are quickly cooled by a cooling device, and then the punch takes the building blocks away from the die, and then the building blocks are ejected by the ejector pin. However, the punch generally pushes through the cavity to the inside of the plug-in column. After the rapid cooling, the building blocks will tightly wrap the punch. In addition, due to the extrusion of air, there is a negative pressure on the contact surface between the punch and the building blocks. The building blocks are easily deformed by being ejected directly by the ejector pin. Especially when the building blocks are relatively thin, the strong ejection may even cause the plug-in columns of the building blocks to be negatively sucked, depressed or even broken.

[0004] To achieve the above objectives, the utility model adopts the following technical solution: an injection mold for building block toys that is convenient for demolding, comprising a fixed plate, a hydraulic telescopic rod 1 is symmetrically arranged on one side of the fixed plate, a push plate is arranged on the output end of the hydraulic telescopic rod 1, a mold base is arranged on the side of the push plate away from the fixed plate, a punch is arranged on the side of the mold base away from the push plate, a push rod is arranged on the four side edges of the punch corresponding to the side of the fixed plate close to the push plate, the push rod passes through the push plate and the mold base, a cylindrical cavity is provided on the inner side of the punch, an air outlet groove is provided at the center of the side of the punch away from the push plate, the air outlet groove is connected to the cylindrical cavity, a hydraulic telescopic rod 2 is provided on the side of the fixed plate close to the push plate corresponding to the punch, the output end of the hydraulic telescopic rod 2 passes through the punch to the inner side of the cylindrical cavity, and the output end of the hydraulic telescopic rod 2 passes through the center line of the cylindrical cavity and is connected to the cylindrical cavity. The air outlet groove is plugged in, and an air guide pipe is arranged in the middle part of one side of the push plate close to the fixed plate, and the air guide pipe is connected with the output end of the hydraulic telescopic rod 2, and an air port is opened on the side of the output end of the hydraulic telescopic rod 2 close to the end head. The outer side of the punch is equidistantly and surroundingly plugged with a top block corresponding to the cylindrical cavity position, and a movable groove is opened on the inner side of the cylindrical cavity corresponding to the top block. A spring is arranged on the inner side of the movable groove, and a movable rod is plugged in the inner side of the spring, and the movable rod passes through the punch and is connected with the top block. A ball is arranged at the end of the movable rod away from the top block, and a baffle is arranged on the side of the spring close to the ball, and the baffle is fixedly connected to the movable rod, and the baffle is plugged in the movable groove. The output end of the hydraulic telescopic rod 2 is sleeved with a top ring corresponding to the ball, and the diameter of the top ring gradually decreases toward the side away from the air outlet groove, and the outer side of the top ring is arranged close to the ball.

[0005] The beneficial effects of the utility model are as follows: the gas is discharged from the gas outlet groove into the inner side of the building block, and at the same time, when the output end of the hydraulic telescopic rod is retracted, the top ring pushes the ball outward, the ball lifts the top block through the movable rod, and the top block pushes the building block outward, so that a gap is generated between the building block and the punch, and the gas spreads rapidly through the gap, thereby eliminating the negative pressure. At this time, the hydraulic telescopic rod drives the push plate to be retracted, and the push rod is pushed out relative to the mold base to push the building block off, effectively avoiding certain damage to the building block caused by the strong push of the push rod.

[0006] In order to reduce the impact on injection molding;

[0007] As a further improvement of the above technical solution: the output end of the second hydraulic telescopic rod is matched with the air outlet groove with high precision, and the top block is matched with the punch with high precision.

[0008] The beneficial effects of this improvement are: the output end of the second hydraulic telescopic rod is matched with the air outlet groove with high precision, the top block is matched with the punch with high precision, the gap is reduced, and the influence on injection molding is reduced as much as possible.

[0009] In order to facilitate the production of multiple blocks at the same time;

[0010] As a further improvement of the above technical solution: the number of the mold base and the punch is multiple, and the mold base and the punch are evenly arranged on the side of the push plate away from the fixed plate.

[0011] The beneficial effect of this improvement is that the number of mold bases and punches is multiple, which is convenient for producing multiple building blocks at the same time.

[0012] In order to cool down the die base and the punch;

[0013] As a further improvement of the above technical solution: a water cooling box is provided in the middle of the push plate, a cavity is provided on the inner side of the mold base, the input end and the output end of the cavity are both connected to the water cooling box, a heat exchanger is provided on the side of the fixed plate, a liquid pump is provided on the lower side of the fixed plate, the output end of the liquid pump is connected to the input end of the heat exchanger, the output end of the heat exchanger is connected to the water cooling box, and the input end of the liquid pump is connected to the water cooling box.

[0014] The beneficial effect of this improvement is that when the punch works repeatedly, the temperature is easily accumulated, which leads to a certain adverse effect on the rapid cooling and molding of the building blocks. By setting up a water cooling box to connect the cavity of the mold base and forming a complete water cooling process through a heat exchanger and a liquid pump, the mold base and the punch can be cooled.

[0015] In order to speed up the heat exchange efficiency of the liquid in the water cooling box;

[0016] As a further improvement of the above technical solution: the number of the heat exchanger and the liquid pump are both two, and they are symmetrically arranged on both sides of the push plate.

[0017] The beneficial effect of this improvement is that two heat exchangers are provided to accelerate the heat exchange efficiency of the liquid in the water cooling box.

[0018] In order to absorb bad gases;

[0019] As a further improvement of the above technical solution: an air suction fan is arranged on the upper side of the push plate, an exhaust pipe is arranged on the upper side of the air suction fan, and the input end of the air suction fan is arranged opposite to the lower punch.

[0020] The beneficial effect of this improvement is that when the punch takes out the building blocks, the release agent and the like volatilize, and harmful gases will be produced, which will cause certain damage to the human body. An air suction fan is provided to absorb the harmful gases and discharge them to the outdoor pipeline through the exhaust pipe.

[0021] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the utility model;

[0023] Figure 2 The structure side view of the utility model Figure 1 ;

[0024] Figure 3 The structure side view of the utility model Figure 2 ;

[0025] Figure 4 It is a top view of the structure of the utility model;

[0026] Figure 5 It is a cross-sectional view of the inner structure of the punch in the utility model;

[0027] In the figure: 1. fixed plate; 2. hydraulic telescopic rod 1; 3. push plate; 4. die base; 5. punch; 51. cylindrical cavity; 52. air outlet groove; 53. ejector block; 54. movable groove; 55. spring; 56. movable rod; 57. ball; 58. baffle; 6. ejector rod; 7. hydraulic telescopic rod 2; 8. air guide pipe; 9. air supply pipe; 10. suction fan; 11. exhaust pipe; 12. water cooling box; 13. heat exchanger; 14. liquid pump; 15. ejector ring. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is described in detail below in conjunction with the accompanying drawings. The description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the present invention.

[0029] like Figure 1As shown in FIG. 5 , a mold for a building block toy convenient for demoulding comprises a fixed plate 1, a hydraulic telescopic rod 2 is symmetrically arranged on one side of the fixed plate 1, a push plate 3 is arranged at the output end of the hydraulic telescopic rod 2, a mold base 4 is arranged on the side of the push plate 3 away from the fixed plate 1, a punch 5 is arranged on the side of the mold base 4 away from the push plate 3, a push rod 6 is arranged on the four side edges of the punch 5 corresponding to the side of the fixed plate 1 close to the push plate 3, the push rod 6 passes through the push plate 3 and the mold base 4, and a cylindrical The center of the side of the punch 5 away from the push plate 3 is provided with an air outlet groove 52, and the air outlet groove 52 is connected with the cylindrical cavity 51. The side of the fixed plate 1 close to the push plate 3 is provided with a hydraulic telescopic rod 2 7 corresponding to the punch 5. The output end of the hydraulic telescopic rod 2 7 passes through the punch 5 to the inside of the cylindrical cavity 51. The output end of the hydraulic telescopic rod 2 7 passes through the center line of the cylindrical cavity 51 and is plugged into the air outlet groove 52. The middle part of the side of the push plate 3 close to the fixed plate 1 is provided with an air guide pipe 8, and the air guide pipe 8 is connected with the hydraulic telescopic rod 2 The output end of the hydraulic telescopic rod 7 is connected, an air port is provided on one side of the output end of the hydraulic telescopic rod 7 near the end, a top block 53 is equidistantly inserted in a surrounding manner at the outer side of the punch 5 corresponding to the cylindrical cavity 51, a movable groove 54 is provided on the inner side of the cylindrical cavity 51 corresponding to the top block 53, a spring 55 is provided on the inner side of the movable groove 54, a movable rod 56 is inserted on the inner side of the spring 55, the movable rod 56 penetrates the punch 5 and is connected with the top block 53, a ball 57 is provided on the end of the movable rod 56 away from the top block 53, the movable groove 54 is provided with a spring 55, a movable rod 56 is inserted on the inner side of the spring 55, the movable rod 56 penetrates the punch 5 and is connected with the top block 53, and a ball 57 is provided on the end of the movable rod 56 away from the top block 53. A baffle 58 is provided on the side of the spring 55 close to the ball 57, and the baffle 58 is fixedly connected to the movable rod 56, and the baffle 58 is plugged into the movable groove 54. The output end of the hydraulic telescopic rod 27 is sleeved with a top ring 15 corresponding to the ball 57, and the diameter of the top ring 15 gradually decreases toward the side away from the air outlet groove 52. The outer side of the top ring 15 is arranged close to the ball 57, and the gas is discharged from the air outlet groove 52 into the inner side of the building block. At the same time, when the output end of the hydraulic telescopic rod 27 is retracted, the top ring 15 pushes the ball 57 outward.The ball 57 lifts the ejector block 53 through the movable rod 56, and the ejector block 53 pushes the building block outward, so that a gap is generated between the building block and the punch 5, and the gas spreads rapidly through the gap, thereby eliminating the negative pressure. At this time, the hydraulic telescopic rod 1 2 drives the push plate 3 to retract, and the ejector rod 6 is ejected relative to the mold base 4 to eject the building block, effectively avoiding certain damage to the building block caused by the strong ejection of the ejector rod 6. The output end of the hydraulic telescopic rod 2 7 is matched with the air outlet groove 52 with high precision, and the ejector block 53 is matched with the punch 5 with high precision. The output end of the hydraulic telescopic rod 2 7 is matched with the air outlet groove 52 with high precision, and the ejector block 53 is matched with the punch 5 with high precision. The block 53 is matched with the punch 5 with high precision to reduce the gap and minimize the influence on injection molding. The number of the mold base 4 and the punch 5 is multiple, and the mold base 4 and the punch 5 are evenly arranged on the side of the push plate 3 away from the fixed plate 1. The number of the mold base 4 and the punch 5 is multiple, which is convenient for producing multiple building blocks at the same time. A water cooling box 12 is arranged in the middle of the push plate 3, and a cavity is arranged on the inner side of the mold base 4. The input end and the output end of the cavity are both connected to the water cooling box 12. A heat exchanger 13 is arranged on the side of the fixed plate 1. The fixed plate 1 A liquid pump 14 is provided at the lower side, the output end of the liquid pump 14 is connected to the input end of the heat exchanger 13, the output end of the heat exchanger 13 is connected to the water cooling box 12, and the input end of the liquid pump 14 is connected to the water cooling box 12. When the punch 5 works repeatedly, it is easy to accumulate temperature, resulting in a certain adverse effect on the rapid cooling and molding of the building block. By providing a water cooling box 12 to connect the cavity of the mold base 4, and forming a complete water cooling process through the heat exchanger 13 and the liquid pump 14, the mold base 4 and the punch 5 can be cooled. The heat exchanger 13 and the liquid There are two pumps 14, which are symmetrically arranged on both sides of the push plate 3. Two heat exchangers 13 are arranged to speed up the heat exchange efficiency of the liquid in the water cooling box 12. An air suction fan 10 is arranged on the upper side of the push plate 3. An exhaust pipe 11 is arranged on the upper side of the air suction fan 10. The input end of the air suction fan 10 is arranged opposite to the lower punch 5. When the punch 5 takes out the building blocks, the release agent and the like volatilize, and there will be bad gases, which will cause certain damage to the human body. The air suction fan 10 can absorb the bad gases and discharge them to the outdoor pipeline through the exhaust pipe 11.

[0030] The working principle and use process of this utility model:

[0031] When in use, after the building block is injection molded and quickly cooled, the hydraulic telescopic rod 2 is started, the hydraulic telescopic rod 2 drives the heat exchanger 13 to move, and the heat exchanger 13 drives the punch 5 to be retracted from the die through the mold base 4, and the building block is sleeved on the outside of the punch. At this time, the air guide pipe 8 is externally connected to the pump, and the air guide pipe 8 supplies air to the output end of the hydraulic telescopic rod 2 7 through the air supply pipe 9, and then puts it into the inner side of the cylindrical cavity 51 through the air port. At the same time, the output end of the hydraulic telescopic rod 2 7 contracts, and the output end of the hydraulic telescopic rod 2 7 is retracted into the cylindrical cavity 51, and the gas inside the cylindrical cavity 51 is discharged from the air outlet groove 52. The top ring 15 pushes the ball 57 outwards, and the ball 57 pushes up the top block 53 through the movable rod 56. The top block 53 pushes up the building block outwards, so that a gap is generated between the building block and the punch 5. The inclination of the top ring 15 is controlled so that when the output end of the hydraulic telescopic rod 27 is retracted into the cylindrical cavity 51, the top block 53 is slightly lifted up, so that the building block is slightly lifted up and deformed, so that an irreversible state will not occur. The gap generated can be used for gas to pass through. After passing through the gas outlet groove 52, the gas passes through the gap between the building block and the punch 5. The gap between the two blocks spreads rapidly, thereby eliminating the negative pressure. At this time, the hydraulic telescopic rod 2 drives the push plate 3 to retract, and the ejector rod 6 is ejected relative to the mold base 4 to eject the block, effectively avoiding certain damage to the block caused by the strong ejection of the ejector rod 6. In addition, when in use, the output end of the hydraulic telescopic rod 2 7 is matched with the air outlet groove 52 with high precision, and the ejector block 53 is matched with the punch 5 with high precision to reduce the gap and minimize the impact on injection molding. In addition, the mold base 4 and the punch 5 are both multiple in number, which is convenient for the simultaneous production of multiple blocks. In addition, when the punch 5 works repeatedly, it is easy to accumulate temperature. The temperature of the mold base 4 and the punch 5 are cooled by the water cooling box 12, and the heat exchanger 13 and the liquid pump 14 form a complete water cooling process. The two heat exchangers 13 are provided to accelerate the heat exchange efficiency of the liquid in the water cooling box 12. In addition, when the punch 5 takes out the building blocks, the release agent and the like are volatilized, and there will be bad gases, which will cause certain damage to the human body. The suction fan 10 is provided to absorb the bad gases and discharge them to the outdoor pipeline through the exhaust pipe 11.

[0032] It should be noted that, in this article, the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0033] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. The above is only a preferred implementation of the present invention. It should be pointed out that due to the limitations of textual expression, there are objectively infinite specific structures. For ordinary technicians in this technical field, without departing from the principles of the present invention, they can make several improvements, modifications or changes, and can also combine the above technical features in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the inventive concept and technical solution to other occasions without improvement, should be regarded as the protection scope of the present invention.

Claims

1. An injection mold for building block toys that is easy to demould, characterized in that: The invention comprises a fixed plate (1), one side of the fixed plate (1) is symmetrically provided with a hydraulic telescopic rod (2), the output end of the hydraulic telescopic rod (2) is provided with a push plate (3), the side of the push plate (3) away from the fixed plate (1) is provided with a die seat (4), the side of the die seat (4) away from the push plate (3) is provided with a punch (5), the side of the fixed plate (1) close to the push plate (3) is provided with a push rod (6) corresponding to the four side edges of the punch (5), the push rod (6) passes through the push plate (3) and the die seat (4), and the inner side of the punch (5) is provided with a cylindrical cavity (51), a gas outlet groove (52) is provided in the center of one side of the punch (5) away from the push plate (3), and the gas outlet groove (52) is communicated with the cylindrical cavity (51). A hydraulic telescopic rod (7) is provided corresponding to the punch (5) on the side of the fixed plate (1) close to the push plate (3), and the output end of the hydraulic telescopic rod (7) passes through the punch (5) to the inside of the cylindrical cavity (51). The output end of the hydraulic telescopic rod (7) passes through the center line of the cylindrical cavity (51) and is plugged into the gas outlet groove (52). A guide is provided in the middle of one side of the push plate (3) close to the fixed plate (1). An air pipe (8) is connected to the output end of the hydraulic telescopic rod (7), and an air port is provided on one side of the output end of the hydraulic telescopic rod (7) near the end. A top block (53) is equidistantly inserted in a surrounding manner at a position corresponding to the cylindrical cavity (51) on the outer side of the punch (5), and a movable groove (54) is provided on the inner side of the cylindrical cavity (51) corresponding to the top block (53). A spring (55) is provided on the inner side of the movable groove (54), and a movable rod (56) is inserted on the inner side of the spring (55). The movable rod (56) passes through the punch (5) and the top block. (53), a round ball (57) is arranged at one end of the movable rod (56) away from the top block (53), a baffle (58) is arranged on the side of the spring (55) close to the round ball (57), the baffle (58) is fixedly connected to the movable rod (56), the baffle (58) is plugged into the movable groove (54), the output end of the hydraulic telescopic rod (7) corresponds to the round ball (57) and is sleeved with a top ring (15), the diameter of the top ring (15) gradually decreases towards the side away from the air outlet groove (52), and the outer side of the top ring (15) is arranged close to the round ball (57).

2. The easy-to-demold building block toy injection mold according to claim 1, characterized in that: The output end of the second hydraulic telescopic rod (7) is matched with the air outlet groove (52) with high precision, and the top block (53) is matched with the punch (5) with high precision.

3. The easy-to-demold injection mold for building block toys according to claim 1, characterized in that: The mold base (4) and the punch (5) are both provided in plural numbers, and the mold base (4) and the punch (5) are evenly arranged on a side of the push plate (3) away from the fixed plate (1).

4. The easy-to-demold building block toy injection mold according to claim 1, characterized in that: A water cooling box (12) is arranged in the middle of the push plate (3), a cavity is arranged on the inner side of the mold base (4), the input end and the output end of the cavity are both connected to the water cooling box (12), a heat exchanger (13) is arranged on the side of the fixed plate (1), a liquid pump (14) is arranged on the lower side of the fixed plate (1), the output end of the liquid pump (14) is connected to the input end of the heat exchanger (13), the output end of the heat exchanger (13) is connected to the water cooling box (12), and the input end of the liquid pump (14) is connected to the water cooling box (12).

5. The easy-to-demold injection mold for building block toys according to claim 4, characterized in that: The number of the heat exchangers (13) and the number of the liquid pumps (14) are both two, and they are symmetrically arranged on both sides of the push plate (3).

6. The easy-to-demold injection mold for building block toys according to claim 1, characterized in that: An air suction fan (10) is arranged on the upper side of the push plate (3), an exhaust pipe (11) is arranged on the upper side of the air suction fan (10), and the input end of the air suction fan (10) is arranged opposite to the lower punch (5).

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