Injection molding equipment for plastic cover of printer

Abstract

The invention discloses printer plastic cover injection molding equipment, and particularly relates to the technical field of injection molding machines, the printer plastic cover injection molding equipment comprises an equipment base, an equipment box body is fixed at the upper end of the equipment base, a storage box body is further fixed at the rear part of the upper end of the equipment base, and a lower mold assembly is further arranged at the upper end of the equipment box body; an upper die assembly matched with the lower die assembly is arranged at the upper end of the storage box body. According to the injection molding equipment for the plastic cover of the printer, the design of the upper mold assembly is adopted, an upper mold can rotate during mold splitting, at the moment, a formed part is further located in a forming cavity of the lower mold, a water gap can be broken off, due to the inverted-cone-shaped design of a water gap groove, hot-melt plastic can enter the forming cavity, and the injection molding efficiency of the plastic cover of the printer is improved. And the cross sectional area of the bottom of the inverted cone is small, so that the water gap is more convenient to break, the water gap can be automatically removed when the lower mold and the upper mold are split, and the device is convenient to operate.

Description

Technical Field

[0001] The invention relates to the technical field of injection molding machines, in particular to a printer plastic cover injection molding device. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into parts with complex shapes. Injection molding is suitable for mass production and molding processing fields such as products with complex shapes. At a certain temperature, the completely molten plastic material is stirred by a screw, injected into the mold cavity with high pressure, and cooled and solidified to obtain a molded product. This method is suitable for mass production of parts with complex shapes and is one of the important processing methods.

[0003] Chinese patent document CN118082139A discloses a bottle cap injection molding device, which belongs to the field of injection molding machines. The bottle cap injection molding device comprises: a bed, and also comprises: a cooling box, which is arranged in the bed; a water baffle, which is fixed on one side of the cooling box; a reflux box, which is arranged on the side of the cooling box close to the water baffle; a first hydraulic cylinder, which is fixed on the side of the cooling box away from the water baffle; a second hydraulic cylinder, which is arranged on the side of the cooling box away from the first hydraulic cylinder; a first mounting plate, which is fixed on the output end of the first hydraulic cylinder; a main mold, which is arranged on the first mounting plate; a second mounting plate, which is fixed on the output end of the second hydraulic cylinder; the present invention effectively prevents the bottle cap after injection molding from being damaged when it is directly demolded and falls, and effectively improves the cooling efficiency of the bottle cap and the mold, and can also clean the bottle cap after injection molding, which can effectively reduce the odor emitted by the bottle cap due to the residual heat.

[0004] However, the device cannot automatically remove the injection nozzle during actual use, and the nozzle of the bottle cap needs to be scraped off separately, which is inconvenient to operate the device. Summary of the invention

[0005] The main purpose of the present invention is to provide a printer plastic cover injection molding device, which can effectively solve the problem that the device cannot automatically remove the water outlet when in use.

[0006] To achieve the above object, the technical solution adopted by the present invention is:

[0007] A printer plastic cover injection molding device comprises a device base, wherein a device box is fixed on the upper end of the device base, a storage box is also fixed to the rear of the upper end of the device base, a lower mold assembly is also arranged on the upper end of the device box, and an upper mold assembly matched with the lower mold assembly is arranged on the upper end of the storage box.

[0008] Preferably, the lower mold assembly includes a mounting base, sliding rods are fixed at the four corners of the upper end of the mounting base, the lower mold is slidably mounted on the outer surface of the sliding rods, two limit blocks for limiting the lower mold are also fixed to the upper end of the mounting base, a plurality of first return springs are also fixed to the upper end of the mounting base, and the lower mold is fixedly connected to the plurality of first return springs.

[0009] Preferably, mounting holes are provided in the multiple mold cavities of the lower mold, a second return spring is fixed to the inner surface of the mounting hole, an extension rod sliding in the mounting hole is fixed to the upper end of the second return spring, an inverted frustum-shaped push rod is fixed to the upper end of the extension rod, and an inverted frustum-shaped groove matching the inverted frustum-shaped push rod is also provided on the upper portion of the outer surface of the mounting hole.

[0010] Preferably, the upper mold assembly includes a first mounting bracket fixed to the front end of the vertical part of the equipment box, two hydraulic cylinders are fixed to the front end of the first mounting bracket, the output ends of the two hydraulic cylinders are commonly fixed with a first mounting plate, the upper end of the first mounting plate is also fixed with a diverter pipe, the upper end of the diverter pipe is fixed with a hot melt extruder, and a plurality of extrusion tubes are fixed to the output end of the diverter pipe, and an upper mold is arranged at the lower end of the first mounting bracket.

[0011] Preferably, a plurality of water outlet grooves are opened at the upper end of the upper mold, and two vibration motors are fixed at the front of the upper end of the upper mold. Mounting rods are arranged at the front of the left and right ends of the upper mold, and guide rods are fixed at the ends of the two mounting rods away from each other, and a guide assembly is also fixed at the upper end of the mounting base.

[0012] Preferably, the nozzle groove is arranged in an inverted cone shape, and the nozzle groove is located directly above the forming cavity.

[0013] Preferably, the guide rod is made of a soft and elastic material.

[0014] Preferably, the guide assembly includes second mounting brackets fixed at both ends of the mounting base, and second mounting plates are fixed to ends of the two second mounting brackets close to each other, and through grooves are formed at ends of the two second mounting plates close to each other.

[0015] Preferably, the upper portion of the through slot is inclined forward.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. This injection molding equipment adopts the design of the upper mold assembly. Through the mutual cooperation between the guide rod and the through groove, the upper mold will rotate when the mold is parted. At this time, the molded part is still in the forming cavity of the lower mold, which will cause the sprue to break. Due to the inverted cone design of the sprue groove, the hot melt plastic can enter the forming cavity. Since the bottom cross-sectional area of ​​the inverted cone is small, it is more convenient to break the sprue, so that the sprue can be automatically removed when the lower mold and the upper mold are parted, which facilitates the operation of the device.

[0018] 2. The injection molding equipment adopts the design of the lower mold assembly. Through the mutual cooperation between the second return spring and the inverted truncated cone push rod, the inverted truncated cone push rod can push out the molded part after the lower mold and the upper mold are separated, which is convenient for removing the molded part. At the same time, the inverted truncated cone push rod adopts an inverted truncated cone design, so that during injection molding, a small amount of molten plastic will enter the gap between the inverted truncated cone push rod and the inverted truncated cone groove one, and no water outlet will appear, which is convenient for removal.

[0019] 3. This injection molding equipment adopts the design of vibration motor, and cooperates with the inclination of the mold, so that the sprue in the sprue groove can be vibrated out, so that the sprue is automatically discharged, which is convenient for the next injection molding of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 The structure of the lower mold assembly of the present invention is schematically shown in FIG. Figure 1 ;

[0022] Figure 3 The structure of the lower mold assembly of the present invention is schematically shown in FIG. Figure 2 ;

[0023] Figure 4 It is a structural schematic diagram of the upper mold assembly of the present invention;

[0024] Figure 5 It is a cross-sectional view of the mold of the present invention when the mold is closed;

[0025] Figure 6 It is a structural schematic diagram of the guide assembly of the present invention;

[0026] Figure 7 For the present invention Figure 1 Enlarged view of point A in the middle.

[0027] In the figure: 1. Equipment base; 2. Lower mold assembly; 3. Upper mold assembly; 4. Guide assembly; 11. Equipment box; 12. Storage box; 21. Mounting base; 22. Slide rod; 23. Lower mold; 24. Limit block; 25. First return spring; 26. Mounting hole; 27. Second return spring; 28. Extension rod; 29. ​​Inverted frustum cone push rod; 31. First mounting bracket; 32. Hydraulic cylinder; 33. First mounting plate; 34. Diverter pipe; 35. Upper mold; 36. Water inlet groove; 37. Vibration motor; 38. Mounting rod; 39. Guide rod; 41. Second mounting bracket; 42. Second mounting plate; 43. Through groove. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0029] Embodiment 1

[0030] like Figure 1 As shown, a printer plastic cover injection molding device includes a device base 1, a device box 11 is fixed on the upper end of the device base 1, a storage box 12 for storing materials is also fixed at the rear of the upper end of the device base 1, a conveying mechanism is also arranged in the storage box 12, and the conveying mechanism can convey plastic particles to the upper mold assembly 3, a lower mold assembly 2 is also arranged on the upper end of the device box 11, and an upper mold assembly 3 adapted to the lower mold assembly 2 is arranged on the upper end of the storage box 12.

[0031] like Figure 2 and Figure 3 As shown, the lower mold assembly 2 includes a mounting base 21, which is fixed to the upper end of the equipment box 11 and fixedly connected by multiple bolts, so as to facilitate the replacement of the lower mold assembly 2. At the same time, it is also necessary to prevent the mounting base 21 from shifting relative to the equipment box 11 when the device is in use, thereby affecting the normal mold closing of the device. Slide bars 22 are fixed to the four corners of the upper end of the mounting base 21, and the lower mold 23 is slidably mounted on the outer surface of the slide bars 22. The slide bars 22 are used to limit the lower mold 23, so that the lower mold 23 can slide up and down on the outer surfaces of multiple slide bars 22. Two limit blocks 24 for limiting the lower mold 23 are also fixed on the upper end of the mounting base 21. A plurality of first return springs 25 are also fixed on the upper end of the mounting base 21, and the lower mold 23 is fixedly connected to the plurality of first return springs 25. The limit blocks 24 can form a gap between the mounting base 21 and the lower mold 23 to facilitate the installation of the first return springs 25, and are used for the installation of the first return springs 25. At the same time, the limit blocks 24 can also prevent the first return springs 25 from being crushed when the mold is closed, thereby affecting the normal use of the first return springs 25.

[0032] Due to the design of multiple first return springs 25, when the upper mold 35 fits with the lower mold 23 and continues to move downward, the first return springs 25 can contract. When the device is demolded, the first return springs 25 can be released, which will cause the lower mold 23 to move upward, facilitating the drainage operation of the device.

[0033] In addition, in order to facilitate the device to take out the molded part when in use, Figure 3 As shown, multiple mold cavities of the lower mold 23 are provided with mounting holes 26, and a second return spring 27 is fixed to the inner cavity floor of the mounting hole 26, wherein the mounting hole 26 is used for installing the second return spring 27, and an extension rod 28 sliding in the mounting hole 26 is fixed to the upper end of the second return spring 27, and an inverted truncated cone-shaped push rod 29 is fixed to the upper end of the extension rod 28. Due to the design of the extension rod 28, the inverted truncated cone-shaped push rod 29 can only move upward or downward relative to the lower mold 23 and will not tilt. It is convenient for the inverted truncated cone-shaped push rod 29 to enter the inverted truncated cone-shaped groove 1, and an inverted truncated cone-shaped groove 1 adapted to the inverted truncated cone-shaped push rod 29 is also provided on the upper portion of the outer surface of the mounting hole 26, so that the top surface of the inverted truncated cone-shaped push rod 29 and the top surface of the forming cavity of the lower mold 23 are at the same horizontal plane when the device is installed. At the same time, due to the inverted truncated cone-shaped design of the inverted truncated cone-shaped push rod 29, a small amount of molten plastic will enter the gap between the inverted truncated cone-shaped push rod 29 and the inverted truncated cone-shaped groove 1 during injection molding, and no water outlet will appear, which is convenient for removal;

[0034] The second return spring 27 is designed so that when the mold is closed, the injection pressure will push the inverted truncated cone push rod 29 downward, thereby contracting the second return spring 27. When the mold is opened, the second return spring 27 is released, allowing the inverted truncated cone push rod 29 to push up the molded part, making it easier to remove the molded part.

[0035] The specific implementation of this embodiment is as follows: when the device is in use, the plastic particles to be used are added into the storage box 12, and then the plastic particles are transferred through the conveying mechanism. When the mold is closed, when the upper mold 35 contacts the lower mold 23 and continues to move downward, the lower mold 23 can be moved downward, and the inverted truncated cone push rod 29 will also move downward, which is convenient for injection molding. When the hot melt plastic is injected into the forming cavity, due to the pressure during injection molding, the inverted truncated cone push rod 29 will move downward until the top surface is at the same level as the top surface of the lower mold 23. After the injection molding is completed, the mold can be separated after cooling and molding.

[0036] When the molds are separated, due to the elastic design of the first return spring 25, it can push the lower mold 23 upward, and then cooperate with the upper mold assembly 3 to remove the sprue of the molded part. Due to the setting of the second return spring 27, the inverted frustum-shaped push rod 29 can lift the molded part to facilitate the removal of the molded part.

[0037] Embodiment 2

[0038] This embodiment further improves the upper mold assembly 3 on the basis of the first embodiment, so that the device can automatically remove the nozzle when in use.

[0039] like Figure 4-Figure 7 As shown, the upper mold assembly 3 includes a first mounting bracket 31 fixed to the front end of the vertical portion of the equipment box 11, and two hydraulic cylinders 32 are fixed to the front end of the first mounting bracket 31. The output ends of the two hydraulic cylinders 32 are commonly fixed with a first mounting plate 33, so that when the output ends of the two hydraulic cylinders 32 are extended or retracted at the same time, the first mounting plate 33 can be driven to move upward or downward at the same time. The two hydraulic cylinders 32 are used to make the mold more stable when the mold is closed. If the mold is small, a single hydraulic cylinder 32 can be used. The present invention will not be repeated in detail. The upper end of the first mounting plate 33 A shunt pipe 34 is also fixed, and a hot melt extruder is fixed at the upper end of the shunt pipe 34. The hot melt extruder is used to heat the plastic particles and extrude the hot melt particles. The output end of the hot melt extruder is connected to the inside of the shunt pipe 34, and the input end of the hot melt extruder is connected to the storage box 12 through a pipeline, so that the plastic particles in the storage box 12 can be transmitted to the hot melt extruder, and a plurality of extrusion tubes are fixed to the output end of the shunt pipe 34. An upper mold 35 is provided at the lower end of the first mounting bracket 31, and the first mounting bracket 31 is rotatably connected to the upper mold 35.

[0040] In addition, a plurality of nozzle grooves 36 are provided at the upper end of the upper mold 35. Figure 5 As shown, the sprue groove 36 is set in an inverted cone shape, so that the hot melt plastic can enter the forming cavity, and because the bottom cross-sectional area of ​​the inverted cone is small, it is more convenient to break at the sprue. The sprue groove 36 is located directly above the forming cavity, which can make the injection molding more uniform and improve the injection molding effect. The injection pressure during injection molding can also push the inverted frustum-shaped push rod 29 to move downward. Two vibration motors 37 are also fixed to the front of the upper end of the upper mold 35. The vibration motor 37 is a prior art that can make the upper mold 35 vibrate, thereby vibrating the sprue inside the sprue groove 36 to facilitate the collection of the sprue. The front of the left and right ends of the upper mold 35 are provided with mounting rods 38, and the ends of the two mounting rods 38 away from each other are fixed with guide rods 39, and the upper end of the mounting base 21 is also fixed with a guide assembly 4.

[0041] When the upper mold 35 is in a horizontal state, the extrusion tube is communicated with the inside of the nozzle groove 36, so that the hot melt plastic can be squeezed into the forming cavity, which facilitates the molding of the material.

[0042] like Figure 6 and Figure 7As shown, the guide assembly 4 includes second mounting brackets 41 fixed at both ends of the mounting base 21, and the second mounting plates 42 are fixed at the ends of the two second mounting brackets 41 close to each other. The second mounting brackets 41 are used for mounting the second mounting plates 42, and the ends of the two second mounting plates 42 close to each other are provided with through grooves 43 adapted to the guide rods 39, and the guide rods 39 slide in the through grooves 43, and the upper part of the through grooves 43 is inclined upward. When the first mounting plate 33 moves upward, the guide rods 39 will slide in the through grooves 43, so that the upper mold 35 can rotate relative to the first mounting plate 33, and due to the design of the first return spring 25, the lower mold 23 will move upward. At this time, the molded part is still in the groove of the forming cavity of the lower mold 23, so that the molded part is tilted. At the same time, due to the design of the water outlet groove 36, the molded part and the water outlet will be broken apart (i.e., broken), thereby completing the water outlet operation. The guide rod 39 is made of an elastic soft material. Since the vibration motor 37 will make the upper mold 35 slide when working, the guide rod 39 will shake relative to the second mounting plate 42. When the guide rod 39 collides with the side wall of the through groove 43, the gap between the guide rod 39 and the through groove 43 will become larger, thereby reducing the accuracy of the device during operation. Therefore, the guide rod 39 is made of an elastic soft material to reduce the rigid contact between the guide rod 39 and the through groove 43 and improve the accuracy of the device during operation.

[0043] The specific implementation of this embodiment is as follows: when the mold needs to be closed, the output ends of the two hydraulic cylinders 32 extend, so that the first mounting plate 33 moves downward, and at the same time, due to the design of the through groove 43, the upper mold 35 changes from an inclined state to a horizontal state, and the first mounting plate 33 continues to move downward, thereby completing the mold closing. At the same time, due to the design of the first return spring 25, the upper mold 35 pushes the lower mold 23 to move downward until the lower mold 23 fits the limit block 24, and then the hot melt extruder is started to inject into the forming cavity, and after the molten plastic in the forming cavity is cooled, the mold separation operation is started;

[0044] When the mold is separated, the output ends of the two hydraulic cylinders 32 are controlled to contract, so that the first mounting plate 33 moves upward. When the first mounting plate 33 moves upward, due to the design of the guide rod 39 and the through groove 43, the upper mold 35 rotates relative to the first mounting plate 33, so that the first mounting plate 33 rotates from a horizontal state to an inclined state. Since most of the molded part is still stuck in the forming cavity of the lower mold 23, the molded part will be tilted relative to the upper mold 35. Due to the design of the water outlet groove 36, the water outlet of the molded part will be broken. Then, due to the design of the second return spring 27, the inverted truncated cone push rod 29 pushes the molded part out of the forming cavity, which is convenient for taking out the molded part.

[0045] When the output end of the hydraulic cylinder 32 moves upward for a certain distance (i.e., after the upper mold 35 rotates a certain angle), the sprue of the molded part is separated from the molded part, and the molded part is placed on the inverted frustum-shaped push rod 29 and is completely separated from the upper mold 35. Then the vibration motor 37 is started. When the vibration motor 37 is working, the upper mold 35 can vibrate. Due to the inclined design of the upper mold 35, the sprue in the sprue groove 36 can be vibrated out, thereby automatically discharging the sprue, which is convenient for the next injection molding of the equipment.

[0046] It should be noted that the specific installation method, circuit connection method and control method of the storage box 12, hydraulic cylinder 32 and vibration motor 37 in the present invention are all conventional designs and will not be elaborated in detail in the present invention.

[0047] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A printer plastic cover injection molding device, comprising a device base (1), characterized in that: A device box (11) is fixed to the upper end of the device base (1), a storage box (12) is also fixed to the rear of the upper end of the device base (1), a lower mold assembly (2) is also arranged at the upper end of the device box (11), and an upper mold assembly (3) adapted to the lower mold assembly (2) is arranged at the upper end of the storage box (12).

2. The printer plastic cover injection molding device according to claim 1, characterized in that: The lower mold assembly (2) comprises a mounting base (21), and sliding rods (22) are fixed at the four corners of the upper end of the mounting base (21), and the lower mold (23) is slidably mounted on the outer surface of the sliding rods (22). Two limit blocks (24) for limiting the lower mold (23) are also fixed at the upper end of the mounting base (21), and a plurality of first return springs (25) are also fixed at the upper end of the mounting base (21), and the lower mold (23) is fixedly connected to the plurality of first return springs (25).

3. The printer plastic cover injection molding device according to claim 2, characterized in that: The multiple mold cavities of the lower mold (23) are each provided with a mounting hole (26), a second return spring (27) is fixed to the inner surface of the mounting hole (26), an extension rod (28) sliding in the mounting hole (26) is fixed to the upper end of the second return spring (27), an inverted truncated cone-shaped push rod (29) is fixed to the upper end of the extension rod (28), and an inverted truncated cone-shaped groove matching the inverted truncated cone-shaped push rod (29) is also provided on the upper portion of the outer surface of the mounting hole (26).

4. The printer plastic cover injection molding device according to claim 3, characterized in that: The upper mold assembly (3) includes a first mounting bracket (31) fixed to the front end of the vertical portion of the equipment box (11), two hydraulic cylinders (32) are fixed to the front end of the first mounting bracket (31), the output ends of the two hydraulic cylinders (32) are commonly fixed with a first mounting plate (33), a shunt pipe (34) is also fixed to the upper end of the first mounting plate (33), a hot melt extruder is fixed to the upper end of the shunt pipe (34), and a plurality of extrusion pipes are fixed to the output end of the shunt pipe (34), and an upper mold (35) is arranged at the lower end of the first mounting bracket (31).

5. The printer plastic cover injection molding device according to claim 4, characterized in that: A plurality of nozzle grooves (36) are provided at the upper end of the upper mold (35); two vibration motors (37) are fixed at the front of the upper end of the upper mold (35); mounting rods (38) are provided at the front of the left and right ends of the upper mold (35); guide rods (39) are fixed at the ends of the two mounting rods (38) that are away from each other; and a guide assembly (4) is also fixed at the upper end of the mounting base (21).

6. The printer plastic cover injection molding device according to claim 5, characterized in that: The nozzle groove (36) is arranged in an inverted cone shape, and the nozzle groove (36) is located directly above the forming cavity.

7. The printer plastic cover injection molding device according to claim 5, characterized in that: The guide rod (39) is made of a soft material with elasticity.

8. The printer plastic cover injection molding device according to claim 5, characterized in that: The guide assembly (4) comprises second mounting brackets (41) fixed at both ends of the mounting base (21); a second mounting plate (42) is fixed to each end of the two second mounting brackets (41) close to each other; and a through groove (43) is formed at each end of the two second mounting plates (42) close to each other.

9. The printer plastic cover injection molding device according to claim 8, characterized in that: The upper portion of the through slot (43) is inclined forward.

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