Plastic product injection molding equipment

Abstract

The invention relates to the technical field of injection molding, in particular to plastic product injection molding equipment which comprises a rack, a mold closing mechanism for injection molding of plastic products is arranged on the rack, the mold closing mechanism comprises an upper mold sliding on the rack, and a lower mold for mold closing with the upper mold is arranged below the upper mold. The plastic product injection molding equipment comprises a rack, an upper mold and a lower mold are arranged on the rack, a vibrator is arranged below the lower mold, a limiting column penetrating through the rack is arranged at the bottom of the lower mold, and a stand column is fixed to the rack. By means of the structure, it can be guaranteed that the upper mold and the lower mold are assembled more completely, and it is avoided that in the process that one mold is fixed and the other mold needs to move to the mold, the moving distance is interfered or errors are generated, the mold assembly accuracy is affected, and then certain defects are generated during injection molding of plastic products, and cost is increased.

Description

Technical Field

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

[0002] Injection molding equipment is the main equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. In the process of plastic injection molding, the mold needs to be closed first, and then injection is performed. After the injection molding of the plastic product is completed, the cooling system is also required to accelerate the cooling to ensure that the product can be quickly shaped and smoothly removed from the mold.

[0003] However, when the current molds are closed, usually one of the molds is fixed and the other mold needs to be moved toward it for closing. During the movement, the distance the mold moves is easily disturbed or errors occur, which will affect the accuracy of the mold closing, thereby causing certain defects in the injection molding of plastic products and increasing costs. Summary of the invention

[0004] The object of the present invention is to provide a plastic product injection molding device, which utilizes the same direction pressure to make the upper mold and the lower mold move synchronously and stabilize at a certain position, thereby ensuring that the upper mold and the lower mold are more completely closed, and avoiding the situation in which one of them is fixed and the other needs to move toward it for closing. In the process, the moving distance is disturbed or an error occurs, which will affect the accuracy of closing the mold, thereby causing certain defects during the injection molding of plastic products and increasing costs.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a plastic product injection molding device, comprising a frame, the frame is provided with a clamping mechanism for injection molding of plastic products, the clamping mechanism comprises an upper mold sliding on the frame, a lower mold for clamping with the upper mold is provided below the upper mold, a vibrator is provided below the lower mold, a limiting column penetrating the frame is provided at the bottom of the lower mold, a column is fixed on the frame, a telescopic spring with one end connected to the bottom of the lower mold is fixed above the column, when the upper mold moves close to the lower mold and contacts with the lower mold for clamping, The upper mold and the lower mold are molded together and continue to move downward. At the same time, the lower mold is driven by the upper mold to move downward, squeezing the telescopic spring and moving to a certain position; a feeding mechanism for cooperating with the mold clamping mechanism to feed materials is provided on one side of the lower mold, and the feeding mechanism includes an adjusting column that follows the movement of the upper mold, a storage barrel sleeved on the adjusting column is fixed on one side of the frame, and a second hydraulic push rod with an output end extending into the storage barrel is provided at the bottom of the storage barrel, a feeding pipe is connected to the storage barrel, and one end of the feeding pipe is connected to an injection pipe for injecting raw materials into the lower mold, and the upper mold drives the adjusting column to move to a During the process of determining the position, one end of the adjusting column moves inside the material storage barrel and compresses the internal space of the material storage barrel. After the upper mold and the lower mold are molded together, the raw material is filled into the material storage barrel, and then the output end of the second hydraulic push rod drives the raw material inside the material storage barrel to be injected into the upper mold through the injection tube; the other side of the lower mold is provided with a pretreatment mechanism for pretreatment before the lower mold and the upper mold are molded together, and the pretreatment mechanism includes a piston rod that moves with the upper mold, and a piston cylinder sleeved on the piston rod is fixed on the other side of the frame, and one side of the piston cylinder is connected to the first An air outlet pipe; the first air outlet pipe is connected to a material storage pipe, one end of the material storage pipe is connected to a discharge pipe and a feeding cylinder, and one end of the discharge pipe is equipped with a limiting ring sleeved on the outside of the limiting column; when the upper mold moves, one end of the piston rod is driven to move inside the piston cylinder, and the gas inside the piston cylinder is driven to be discharged through the first air outlet pipe to clean the lower mold; at the same time, a part of the gas inside the first air outlet pipe flows into the material storage pipe, and after the gas flows into the material storage pipe, it pushes the lubricating oil inside the pipe to move, so that the lubricating oil is sprayed out to the inside of the limiting ring through the discharge pipe and flows to the outside of the limiting column.

[0006] Preferably, a first hydraulic push rod is fixed on the frame, and an output end of the first hydraulic push rod is connected to the upper mold.

[0007] Preferably, guide rods are fixed on both sides of the frame, and both sides of the upper mold slide along the guide rods.

[0008] Preferably, the columns are fixedly mounted on the frame in four groups, and the telescopic springs are also four groups with two ends respectively fixed to the columns and the lower mold.

[0009] Preferably, the limiting columns are fixed at the bottom of the lower mold in four groups, and the four groups of limiting columns are all connected to the frame through the frame.

[0010] Preferably, a first connecting plate connected to the upper mold is fixed on the top of the adjusting column, a feeding pipe is connected to the storage barrel, and the injection tube is designed as a hose.

[0011] Preferably, a second connecting plate connected to the upper mold is fixed to the top of the piston rod, and the top of the first air outlet pipe is connected to multiple groups of air outlets located on one side of the lower mold.

[0012] Preferably, a feed pipe with a one-way valve a is provided at one end of the feeding cylinder, and one end of the feed pipe is connected to the material storage pipe.

[0013] Preferably, a one-way valve b is provided on the discharge pipe.

[0014] Preferably, the limiting ring is fixedly arranged on the frame, and the limiting column slides on the limiting ring.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention allows the upper mold to approach the lower mold along the guide rod. After the upper mold and the lower mold are in contact and molded, the upper mold continues to move downward. At this time, the upper mold and the lower mold are molded and move downward together. The downward movement of the lower mold will squeeze the telescopic spring, and at the same time, the lower mold drives the limiting column to move. The limiting column penetrates the frame. After the upper mold and the lower mold are moved to a certain position, the mold closing work is completed. After the upper mold and the lower mold are pre-molded, the upper mold and the lower mold are moved synchronously and stabilized at a certain position by using the same direction pressure. On the one hand, it can ensure that the upper mold and the lower mold are molded more completely, and avoid that one of them is fixed and the other needs to move to it. During the process of mold closing, the moving distance is disturbed or an error is generated, which will affect the accuracy of mold closing, and then cause certain defects during the injection molding of plastic products, increasing the cost; on the other hand, two dynamic molds are used, and the same direction pressure is applied after the mold closing, which can further improve the accuracy of the upper mold and the lower mold.

[0017] 2. The present invention drives the lower mold to vibrate through a vibrator. Since the bottom of the lower mold is connected to the column through a telescopic spring, the telescopic spring can play a buffering role when the lower mold vibrates. At the same time, when the lower mold vibrates, since the limiting column at the bottom of the lower mold is connected with the frame, it is restricted by the limiting column. During the vibration of the lower mold, the telescopic spring is used for buffering, and the limiting column moves up and down on the frame to drive the plastic product inside the lower mold to vibrate. On the one hand, the vibration of the lower mold can demold the plastic product inside, making it convenient for the staff to take it. On the other hand, the vibration causes a slight collision between the plastic product and the lower mold, which can detect the quality of the plastic product and improve the quality of the plastic product. In addition, the vibration amplitude of the vibrator can be adjusted according to actual conditions, thereby controlling the vibration degree of the lower mold to avoid excessive vibration of the plastic product, which affects the quality of the plastic product and the life of the lower mold.

[0018] 3. In the present invention, when the second connecting plate moves, the second connecting plate drives the piston rod to move inside the piston cylinder. During the movement of the piston rod inside the piston cylinder, the gas inside the piston cylinder is squeezed into the first air outlet pipe and discharged through the air outlet. Since the air outlet is located on one side of the lower mold, the lower mold can be automatically cleaned to prevent dust from affecting the injection molding of the plastic product of the lower mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a partial cross-sectional view of the present invention;

[0021] Figure 3 It is the second partial cross-sectional view of the present invention;

[0022] Figure 4 The second schematic diagram of the overall structure of the present invention;

[0023] Figure 5 The third is a partial cross-sectional view of the present invention;

[0024] Figure 6 It is a partial structural schematic diagram of the present invention;

[0025] Figure 7 It is a fourth partial cross-sectional view of the present invention;

[0026] Figure 8 Partial structural diagram of the present invention

[0027] Fig. 9 The third is a partial structural schematic diagram of the present invention.

[0028] In the figure: 1. frame; 2. clamping mechanism; 21. first hydraulic push rod; 22. upper mold; 23. lower mold; 24. guide rod; 25. column; 26. limiting column; 27. telescopic spring; 3. feeding mechanism; 31. first connecting plate; 32. adjusting column; 33. storage barrel; 34. second hydraulic push rod; 35. feeding pipe; 36. injection pipe; 4. pretreatment mechanism; 41. second connecting plate; 42. piston rod; 43. piston barrel; 44. first air outlet pipe; 45. air outlet; 46. second air outlet pipe; 47. storage pipe; 48. limiting ring; 49. feeding barrel; 410. feeding pipe; 411. discharge pipe. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The present invention provides a plastic product injection molding device, comprising a frame 1, on which a clamping mechanism 2 for injection molding of plastic products is arranged, the clamping mechanism 2 comprises an upper mold 22 sliding on the frame 1, a lower mold 23 for clamping with the upper mold 22 is arranged below the upper mold 22, a vibrator is arranged below the lower mold 23, a limiting column 26 penetrating the frame 1 is arranged at the bottom of the lower mold 23, a column 25 is fixed on the frame 1, a telescopic spring 27 having one end connected to the bottom of the lower mold 23 is fixed above the column 25, when the upper mold 22 moves close to the lower mold 23 and contacts with the lower mold 23 for clamping, the upper mold 22 and the lower mold 23 are clamped together. The mold 23 continues to move downward after the mold is closed. At the same time, the lower mold 23 is driven by the upper mold 22 to move downward, squeezing the telescopic spring 27 and moving to a certain position; a first hydraulic push rod 21 is fixed on the frame 1, and the output end of the first hydraulic push rod 21 is connected to the upper mold 22. Guide rods 24 are fixed on both sides of the frame 1. Both sides of the upper mold 22 slide along the guide rods 24. Four groups of columns 25 are fixedly installed on the frame 1. The telescopic spring 27 is also four groups and the two ends are respectively fixed to the columns 25 and the lower mold 23. Four groups of limiting columns 26 are fixed at the bottom of the lower mold 23, and the four groups of limiting columns 26 are all connected to the frame 1;

[0031] See also Figures 1 to 6As shown, during the injection molding of the plastic product, the first hydraulic push rod 21 is started, and the output end of the first hydraulic push rod 21 drives the upper mold 22 to move, and the upper mold 22 moves toward the lower mold 23 along the guide rod 24. After the upper mold 22 and the lower mold 23 are in contact and molded, the upper mold 22 continues to move downward. At this time, the upper mold 22 and the lower mold 23 are molded and move downward together. The downward movement of the lower mold 23 will squeeze the telescopic spring 27. At the same time, the lower mold 23 drives the limiting column 26 to move. The limiting column 26 penetrates the frame 1. After the upper mold 22 and the lower mold 23 move to a certain position, the mold closing work is completed. The upper mold 22 is used. After the upper mold 22 and the lower mold 23 are pre-molded, the unidirectional pressure is used to make the upper mold 22 and the lower mold 23 move synchronously and stabilize at a certain position. On the one hand, it can ensure that the upper mold 22 and the lower mold 23 are molded more completely, and avoid that one of them is fixed and the other needs to move toward it. During the mold closing process, the moving distance is disturbed or an error occurs, which will affect the accuracy of the mold closing, and then cause certain defects during the injection molding of the plastic product, increasing the cost; on the other hand, two dynamic molds are used, and the unidirectional pressure is applied after the mold closing, which can further improve the accuracy of the mold closing of the upper mold 22 and the lower mold 23.

[0032] In addition, after the plastic product is injection molded, during the process of the upper mold 22 moving upward to reset, after the upper mold 22 and the lower mold 23 cancel contact and extrusion, the lower mold 23 is reset by the elastic force of the telescopic spring 27. At this time, after the plastic product is cooled, the vibrator at the bottom of the lower mold 23 is started, and the vibrator drives the lower mold 23 to vibrate. Since the bottom of the lower mold 23 is connected to the column 25 through the telescopic spring 27, the telescopic spring 27 can play a buffering role when the lower mold 23 vibrates. At the same time, when the lower mold 23 vibrates, since the limiting column 26 at the bottom of the lower mold 23 is connected to the frame 1 through and through, the lower mold 23 is restricted by the limiting column 26. During the vibration process, the telescopic spring 27 is used for buffering, while the limiting column 26 moves up and down on the frame 1, thereby driving the plastic product inside the lower mold 23 to vibrate. On the one hand, the vibration of the lower mold 23 can demould the internal plastic product, making it convenient for the staff to take it out. On the other hand, the vibration causes a slight collision between the plastic product and the lower mold 23, which can detect the quality of the plastic product and improve the quality of the plastic product. In addition, the vibration amplitude of the vibrator can be adjusted according to actual conditions, thereby controlling the vibration degree of the lower mold 23 to avoid excessive vibration of the plastic product, which affects the quality of the plastic product and the life of the lower mold 23.

[0033] A feeding mechanism 3 for cooperating with the mold clamping mechanism 2 to feed materials is provided on one side of the lower mold 23. The feeding mechanism 3 includes an adjusting column 32 that moves with the upper mold 22. A storage barrel 33 sleeved on the adjusting column 32 is fixed on one side of the frame 1. A second hydraulic push rod 34 with an output end extending into the storage barrel 33 is provided at the bottom of the storage barrel 33. A feeding pipe 35 is connected to the storage barrel 33. One end of the feeding pipe 35 is connected to an injection pipe 36 for injecting raw materials into the lower mold 23. The upper mold 22 drives the adjusting column 32 to move to a During the process of positioning, one end of the adjusting column 32 moves inside the material storage barrel 33 and compresses the internal space of the material storage barrel 33. After the upper mold 22 and the lower mold 23 are molded together, the material is filled into the material storage barrel 33, and then the output end of the second hydraulic push rod 34 drives the material inside the material storage barrel 33 to be injected into the upper mold 22 through the injection tube 36; the top of the adjusting column 32 is fixed with a first connecting plate 31 connected to the upper mold 22, and the material storage barrel 33 is connected with a feeding tube, and the injection tube 36 is designed as a hose;

[0034] See also Figures 3 to 7 As shown, in the process of the upper mold 22 moving down and approaching the lower mold 23 for mold closing, the upper mold 22 synchronously drives the adjusting column 32 to move, and one end of the adjusting column 32 moves inside the storage barrel 33. After the upper mold 22 and the lower mold 23 complete the mold closing work, one end of the adjusting column 32 stays at a position inside the storage barrel 33. At this time, the raw material is injected into the storage barrel 33 through the feeding pipe connected to the storage barrel 33, and then the second hydraulic push rod 34 is started. The output end of the second hydraulic push rod 34 squeezes the raw material inside the storage barrel 33 into the feeding pipe 35, and then the feeding pipe 35 inputs it into the injection pipe 36, and then the injection pipe 36 injects it into the upper mold 22 and the lower mold. The molding is performed inside the mold 23; thus, after the upper mold 22 and the lower mold 23 are molded together, the position of one end of the adjusting column 32 inside the storage barrel 33 can be used to automatically control the internal volume of the storage barrel 33, thereby automatically controlling the amount of raw material to be injected; the amount of injection molding can be accurately controlled to save costs; in addition, the initial position of the adjusting column 32 can be adjusted according to actual conditions, thereby controlling the moving distance of one end of the adjusting column 32 inside the storage barrel 33, thereby controlling the internal volume of the storage barrel 33 and improving its flexibility; in addition, the storage barrel 33 is transparently designed and has scales on the outside, so that the amount of raw material inside the storage barrel 33 can be intuitively viewed, which is convenient for staff to view and record.

[0035] The other side of the lower mold 23 is provided with a pretreatment mechanism 4 for pretreatment before the lower mold 23 and the upper mold 22 are molded together. The pretreatment mechanism 4 includes a piston rod 42 that moves with the upper mold 22. A piston cylinder 43 that is sleeved on the piston rod 42 is fixed on the other side of the frame 1. One side of the piston cylinder 43 is connected to a first air outlet pipe 44 located on one side of the lower mold 23; the first air outlet pipe 44 is connected to a storage pipe 47, one end of the storage pipe 47 is connected to a discharge pipe 411 and a feeding cylinder 49, and one end of the discharge pipe 411 is installed with a limiting ring 48 sleeved on the outside of the limiting column 26; when the upper mold 22 moves, one end of the piston rod 42 is driven to move inside the piston cylinder 43, and the internal gas of the piston cylinder 43 is driven to be discharged through the first air outlet pipe 44 to the lower mold 23 is cleaned; at the same time, a part of the gas inside the first air outlet pipe 44 flows into the interior of the storage pipe 47. After the gas flows into the storage pipe 47, it pushes the lubricating oil inside it to move, so that the lubricating oil is sprayed to the inside of the limiting ring 48 through the discharge pipe 411 and flows to the outside of the limiting column 26. The top of the piston rod 42 is fixed with a second connecting plate 41 connected to the upper mold 22. The top of the first air outlet pipe 44 is connected to multiple groups of air outlets 45 located on one side of the lower mold 23. One end of the feeding cylinder 49 is provided with a feeding pipe 410 with a one-way valve a. One end of the feeding pipe 410 is connected to the storage pipe 47. The discharge pipe 411 is provided with a one-way valve b. The limiting ring 48 is fixedly arranged on the frame 1, and the limiting column 26 slides on the limiting ring 48.

[0036] See also Figures 4 to 8 As shown, in addition, when the upper mold 22 moves down and approaches the lower mold 23 for mold closing, the upper mold 22 drives the second connecting plate 41 to move, and the second connecting plate 41 drives the piston rod 42 to move inside the piston cylinder 43. During the movement of the piston rod 42 inside the piston cylinder 43, the internal gas of the piston cylinder 43 is squeezed into the first air outlet pipe 44 and discharged through the air outlet 45. Since the air outlet 45 is located on one side of the lower mold 23, the lower mold 23 can be automatically cleaned to prevent dust from affecting the injection molding of the plastic product of the lower mold 23.

[0037] In addition, during the process of the gas inside the first air outlet pipe 44 being discharged through the air outlet 45, a part of the wind inside the first air outlet pipe 44 enters into the storage pipe 47. After the wind enters into the storage pipe 47, it squeezes the lubricating oil inside the storage pipe 47 to move. The lubricating oil is sprayed to the inner side of the limiting ring 48 through the discharge pipe 411, and then flows to the outer side of the limiting column 26. During the vibration of the lower mold 23, the limiting column 26 plays a lubricating role when it moves on the limiting ring 48, thereby improving the smoothness of the vibration of the lower mold 23 and avoiding damage caused by long-term sliding friction between the limiting column 26 and the limiting ring 48, which affects the vibration of the lower mold 23.

[0038] See also Figure 8 as well as Fig. 9As shown, the second air outlet pipe 46 is used to allow the wind inside the first air outlet pipe 44 to flow into another group of storage pipes 47, thereby lubricating the four groups of limiting columns 26; in addition, the lubricant is added to the storage pipe 47 through the feeding cylinder 49.

[0039] Working principle: When performing injection molding of plastic products, start the first hydraulic push rod 21, and the output end of the first hydraulic push rod 21 drives the upper mold 22 to move, and the upper mold 22 approaches the lower mold 23 along the guide rod 24. After the upper mold 22 and the lower mold 23 are in contact and molded, the upper mold 22 continues to move downward. At this time, the upper mold 22 and the lower mold 23 are molded and move downward together. The downward movement of the lower mold 23 will squeeze the telescopic spring 27. At the same time, the lower mold 23 drives the limiting column 26 to move. The limiting column 26 passes through the frame 1. After the upper mold 22 and the lower mold 23 move to a certain position, the mold closing work is completed. After the upper mold 22 and the lower mold 23 are pre-closed, the upper mold 22 and the lower mold 23 are moved synchronously and stabilized at a certain position using the same direction pressure.

[0040] When the upper mold 22 moves down and approaches the lower mold 23 for mold closing, the upper mold 22 synchronously drives the adjusting column 32 to move, and one end of the adjusting column 32 moves inside the storage barrel 33. After the upper mold 22 and the lower mold 23 complete the mold closing work, one end of the adjusting column 32 stays at a position inside the storage barrel 33. At this time, raw materials are injected into the storage barrel 33 through the feeding pipe connected to the storage barrel 33, and then the second hydraulic push rod 34 is started. The output end of the second hydraulic push rod 34 squeezes the raw materials inside the storage barrel 33 into the feeding pipe 35, and then the feeding pipe 35 inputs it into the injection tube 36, and then the injection tube 36 injects it into the upper mold 22 and the lower mold 23 for molding.

[0041] When the upper mold 22 moves down and approaches the lower mold 23 for mold closing, the upper mold 22 drives the second connecting plate 41 to move, and the second connecting plate 41 drives the piston rod 42 to move inside the piston cylinder 43. When the piston rod 42 moves inside the piston cylinder 43, the internal gas of the piston cylinder 43 is squeezed into the first air outlet pipe 44 and discharged through the air outlet 45. Since the air outlet 45 is located on one side of the lower mold 23, the lower mold 23 can be automatically cleaned to prevent dust from affecting the injection molding of the plastic product of the lower mold 23.

[0042] During the process of the gas inside the first air outlet pipe 44 being discharged through the air outlet 45, a part of the wind inside the first air outlet pipe 44 enters into the storage pipe 47. After entering into the storage pipe 47, the wind squeezes the lubricating oil inside the storage pipe 47 and moves it. The lubricating oil is sprayed to the inner side of the limiting ring 48 through the discharge pipe 411, and then flows to the outer side of the limiting column 26. During the vibration of the lower mold 23, the limiting column 26 plays a lubricating role when moving on the limiting ring 48, thereby improving the smoothness of the vibration of the lower mold 23.

[0043] After the plastic product is injection molded, during the process of the upper mold 22 moving upward and resetting, after the upper mold 22 and the lower mold 23 cancel contact and extrusion, the lower mold 23 is reset by the elastic force of the telescopic spring 27. At this time, after the plastic product is cooled, the vibrator at the bottom of the lower mold 23 is started, and the vibrator drives the lower mold 23 to vibrate. Since the bottom of the lower mold 23 is connected to the column 25 through the telescopic spring 27, the telescopic spring 27 can play a buffering role when the lower mold 23 vibrates. At the same time, when the lower mold 23 vibrates, since the limiting column 26 at the bottom of the lower mold 23 is connected with the frame 1 through and through, it is restricted by the limiting column 26. During the vibration of the lower mold 23, while the telescopic spring 27 is used for buffering, the limiting column 26 reciprocates up and down on the frame 1, thereby driving the plastic product inside the lower mold 23 to vibrate. On the one hand, the vibration of the lower mold 23 can demould the internal plastic product, which is convenient for the staff to take it. On the other hand, the vibration causes a slight collision between the plastic product and the lower mold 23, which can detect the quality of the plastic product and improve the quality of the plastic product.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic product injection molding device, comprising a frame (1), characterized in that: The frame (1) is provided with a clamping mechanism (2) for injection molding of plastic products, the clamping mechanism (2) comprising an upper mold (22) sliding on the frame (1), a lower mold (23) for clamping with the upper mold (22) being provided below the upper mold (22), a vibrator being provided below the lower mold (23), a limiting column (26) penetrating the frame (1) being provided at the bottom of the lower mold (23), a column (25) being fixed on the frame (1), a telescopic spring (27) having one end connected to the bottom of the lower mold (23) being fixed above the column (25), when the upper mold (22) moves close to the lower mold (23) and contacts with the lower mold (23) for clamping, the upper mold (22) and the lower mold (23) continue to move downward after clamping, and at the same time, when the lower mold (23) is driven by the upper mold (22) to move downward, it squeezes the telescopic spring (27) and moves to a certain position; A feeding mechanism (3) for cooperating with the mold clamping mechanism (2) for feeding is arranged on one side of the lower mold (23), and the feeding mechanism (3) includes an adjusting column (32) that moves following the upper mold (22). A storage barrel (33) sleeved on the adjusting column (32) is fixed on one side of the frame (1), and a second hydraulic push rod (34) with an output end extending into the storage barrel (33) is arranged at the bottom of the storage barrel (33). A feeding pipe (35) is connected to the storage barrel (33), and one end of the feeding pipe (35) is connected to the lower mold. (23) an injection tube (36) for injecting raw materials, in the process of the upper mold (22) driving the adjusting column (32) to move to a certain position, one end of the adjusting column (32) moves inside the storage barrel (33) and compresses the internal space of the storage barrel (33), after the upper mold (22) and the lower mold (23) are molded together, the raw materials are filled into the storage barrel (33), and then the output end of the second hydraulic push rod (34) drives the raw materials inside the storage barrel (33) to be injected into the upper mold (22) through the injection tube (36); The other side of the lower mold (23) is provided with a pretreatment mechanism (4) for pretreatment before the lower mold (23) and the upper mold (22) are molded together. The pretreatment mechanism (4) includes a piston rod (42) that moves following the upper mold (22). The other side of the frame (1) is fixed with a piston cylinder (43) sleeved on the piston rod (42). One side of the piston cylinder (43) is connected to a first air outlet pipe (44) located on one side of the lower mold (23); the first air outlet pipe (44) is connected to a material storage pipe (47), one end of the material storage pipe (47) is connected to a discharge pipe (411) and a feeding cylinder (49), and the discharge pipe (411) is connected to the feeding cylinder (49). 11) is provided with a limiting ring (48) sleeved on the outside of the limiting column (26); when the upper mold (22) moves, one end of the piston rod (42) is driven to move inside the piston cylinder (43), and the internal gas of the piston cylinder (43) is driven to be discharged through the first air outlet pipe (44) to clean the lower mold (23); at the same time, a part of the gas inside the first air outlet pipe (44) flows into the inside of the storage pipe (47), and after the gas flows into the inside of the storage pipe (47), it pushes the lubricating oil inside the storage pipe (47) to move, so that the lubricating oil is sprayed out to the inside of the limiting ring (48) through the discharge pipe (411) and flows to the outside of the limiting column (26).

2. A plastic product injection molding device according to claim 1, characterized in that: A first hydraulic push rod (21) is fixed on the frame (1), and an output end of the first hydraulic push rod (21) is connected to an upper mold (22).

3. The plastic product injection molding equipment according to claim 1, characterized in that: Guide rods (24) are fixed on both sides of the frame (1), and both sides of the upper mold (22) slide along the guide rods (24).

4. The plastic product injection molding equipment according to claim 1, characterized in that: The columns (25) are fixedly mounted on the frame (1) in four groups, and the telescopic springs (27) are also fixed on the columns (25) and the lower mold (23) at both ends thereof.

5. The plastic product injection molding equipment according to claim 1, characterized in that: The limiting columns (26) are four groups fixed on the bottom of the lower mold (23), and the four groups of limiting columns (26) are all connected to the frame (1) through the connection.

6. The plastic product injection molding equipment according to claim 1, characterized in that: A first connecting plate (31) connected to the upper mold (22) is fixed on the top of the adjusting column (32), a feeding pipe is connected to the storage cylinder (33), and the injection tube (36) is designed as a hose.

7. The plastic product injection molding equipment according to claim 1, characterized in that: A second connecting plate (41) connected to the upper mold (22) is fixed on the top of the piston rod (42), and the top of the first air outlet pipe (44) is connected to a plurality of groups of air outlets (45) located on one side of the lower mold (23).

8. The plastic product injection molding equipment according to claim 1, characterized in that: One end of the feeding cylinder (49) is provided with a feeding pipe (410) with a one-way valve a, and one end of the feeding pipe (410) is connected to the material storage pipe (47).

9. The plastic product injection molding equipment according to claim 1, characterized in that: The discharge pipe (411) is provided with a one-way valve b.

10. The plastic product injection molding equipment according to claim 1, characterized in that: The limiting ring (48) is fixedly arranged on the frame (1), and the limiting column (26) slides on the limiting ring (48).

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