CN-120170989-B - Double-colored injection mold for plastic goods

Abstract

The invention relates to the technical field of injection molds, in particular to a double-color injection mold for plastic products, which comprises a right mold and a left mold, wherein the right mold comprises a right seat plate, a right cover plate is fixedly connected to one side wall of the right seat plate, a yielding groove is formed in one side wall of the right cover plate, and two half molds are arranged in the yielding groove. According to the invention, through arranging the two half molds and pushing the connecting assembly to be matched with each other, the inner walls of the two half molds can be provided with the grooves or the connecting convex blocks, so that the outer wall of a product subjected to primary injection molding has the grooves and the convex blocks, and the convex blocks matched with the grooves or the grooves matched with the convex blocks are formed on the inner wall of the product subjected to secondary injection molding when the product is subjected to secondary injection molding, so that even if the connection between the primary injection molding and the secondary injection molding of the product is unstable, a stable wedge can be formed between the grooves and the convex blocks, the materials subjected to primary injection molding and the secondary injection molding can be stably connected, the limitation on the materials during double-shot injection molding is avoided, and the practicability of double-shot injection molding is improved.

Inventors

• LI YAFENG

Assignees

• 深圳市天兴恒塑胶电子科技有限公司

Dates

Publication Date

20260512

Application Date

20250520

Claims (1)

1. 1. The double-shot injection mold for the plastic product comprises a right mold (101) and a left mold (102), and is characterized in that; The right die (101) comprises a right seat plate (1), a right cover plate (2) is fixedly connected to one side wall of the right seat plate (1), a yielding groove (3) is formed in one side wall of the right cover plate (2), two half dies (4) are arranged in the yielding groove (3), connecting rods (5) are fixedly connected to one side wall of each half die (4), one end of each connecting rod (5) penetrates through the right cover plate (2) and extends to one side of the right cover plate (2), a pushing connecting assembly is arranged on one side of each connecting rod (5) on one side of the right cover plate (2), a spring piece (6) is fixedly connected to one side wall of each half die (4), a fixing plate (7) is fixedly connected with the inner wall of the yielding groove (3), and a die cavity (8) is formed in one side wall of each right cover plate (2). The pushing connection assembly comprises a push rod fixing rod (9) penetrating through the right seat plate (1), one end of the push rod fixing rod (9) is fixedly connected with a wedge block (10), one end of the connecting rod (5) is fixedly connected with a connecting block (11), one side wall of the connecting block (11) is rotatably connected with a rotary rod (12), and the rotary rod (12) is arranged at one side of the wedge block (10); The left die (102) comprises a left seat plate (13), a left cover plate (14) is fixedly connected to one side wall of the left seat plate (13), four fixing holes (15) are formed in one side wall of the left cover plate (14), a pin die (16) is fixedly connected to the inner wall of each fixing hole (15), a blanking ejector rod (17) is slidably connected to the inner wall of each pin die (16), a compression spring (18) is sleeved on the outer wall of each blanking ejector rod (17), one end of each compression spring (18) is fixedly connected with the corresponding blanking ejector rod (17), the other end of each compression spring (18) is fixedly connected with the corresponding pin die (16), a fixing seat (19) is rotationally connected to one side wall of each left seat plate (13), a guide block (20) is fixedly connected to one side wall of each fixing seat (19), one end of each blanking ejector rod (17) penetrates through the left seat plate (13) and extends to one side of the fixing seat (19), and a driving mechanism is arranged on one side of each fixing seat (19); the driving mechanism comprises a motor (21) fixedly connected with the fixing seat (19), a driving end of the motor (21) is fixedly connected with a gear (22), a ring tooth slot (23) is formed in one side wall of the left seat plate (13), and the ring tooth slot (23) is meshed with the gear (22); a connecting plate (24) is fixedly connected to one side wall of the right cover plate (2), a groove (25) is formed in one side wall of the connecting plate (24), and an edge trimming knife (26) is detachably connected to the inner wall of the groove (25); a connecting shaft (27) is fixedly connected to one side wall of the fixed seat (19), a bearing (28) is fixedly sleeved on the outer wall of the connecting shaft (27), and the outer wall of the bearing (28) is fixedly connected with the left seat plate (13); a clamping groove is formed in one end of the blanking ejector rod (17), and a ball (29) is arranged in the clamping groove; a fixing through hole (30) is formed in the side wall of one side of the fixing seat (19); Before the injection molding machine is used, a left die (102) is fixed on one side of the injection molding machine by using a bolt and a fixing through hole (30), a push rod of the injection molding machine for pushing a right die (101) to move and be clamped is connected with a push rod fixing rod (9), when the push rod pushes the right die (101) to move and be clamped, the push rod firstly pushes the push rod fixing rod (9) to move, the moving push rod fixing rod (9) pushes a wedge block (10) to move, after the wedge block (10) moves to a certain position, the wedge block (10) is contacted with a rotary rod (12) so that the wedge block (10) pushes the rotary rod (12) to move, and the moving rotary rod (12) drives a connecting rod (5) to move with two half dies (4) so that the two half dies (4) can synthesize a complete cavity; Then the push rod pushes the right die (101) to approach the left die (102), after die assembly is completed, injection molding and cooling can be carried out in the two half dies (4) to process a product which is injected once, then the push rod pulls the push rod fixing rod (9) to reset with the right die (101), when the push rod fixing rod (9) resets, the reset push rod fixing rod (9) firstly drives the wedge block (10) to reset, when the wedge block (10) resets, the spring piece (6) pushes the two half dies (4) to separate, and after the two half dies (4) are separated, the push rod fixing rod (9) continues to pull the right die (101) to reset; after the right die (101) is reset, the product subjected to primary injection molding is sleeved on the outer wall of one of the pin dies (16); The inner walls of the two half molds (4) can be provided with grooves or connecting convex blocks, so that grooves and convex blocks are formed on the outer walls of products obtained by one-time injection molding, and when the secondary injection molding is carried out, the convex blocks matched with the grooves or the grooves matched with the convex blocks are formed on the inner walls of products obtained by the secondary injection molding, so that a stable wedge can be formed between the grooves and the convex blocks even if the connection between materials is unstable during one-time injection molding and the secondary injection molding of the products, and the materials obtained by one-time injection molding and the secondary injection molding can be stably connected, thereby avoiding the limitation on the materials during the double-shot injection molding and improving the practicability of the double-shot injection molding; After the right die (101) is reset, the motor (21) is started, the motor (21) drives the gear (22) to rotate, the rotating gear (22) drives the left seat plate (13), the left cover plate (14), the pin dies (16) and the blanking ejector rod (17) to rotate ninety degrees through the annular tooth grooves (23), when the pin dies (16) rotate by 90 degrees, one pin die (16) rotates to one side of two half dies (4), a product which is just injected and finished is sleeved on the pin dies is rotated to one side of the connecting plate (24), then the die is clamped again for the next injection, and when the die is clamped at this time, the trimming knife (26) approaches to the product which is just injected and finished, so that the trimming knife (26) can trim the product which is just injected, even if overflow edges occur between the two half dies (4), the trimming knife (26) can trim the edges, and the overflow edges are prevented from influencing the second injection; After trimming, the right die (101) and the left die (102) are separated, a motor (21) is started after the die separation, so that the motor (21) drives a gear (22) to rotate, the rotating gear (22) drives a left seat plate (13), a left cover plate (14), a pin die (16) and a blanking ejector rod (17) to rotate ninety degrees again through a ring tooth slot (23), at the moment, a product just subjected to trimming is rotated to one side of a die cavity (8), and when the right die (101) and the left die (102) are clamped, the product subjected to trimming is inserted into the slot die cavity (8) for secondary injection molding; After the secondary injection molding is finished, the mold is separated again, then the motor (21) drives the product after the secondary injection molding to rotate, and one end of the blanking ejector rod (17) is in contact with the guide block (20) when the motor rotates, so that the guide block (20) pushes the blanking ejector rod (17) to move, and the moving blanking ejector rod (17) pushes the product after the secondary injection molding to finish the blanking of the product.

Description

Double-colored injection mold for plastic goods Technical Field The invention relates to the technical field of injection molds, in particular to a double-color injection mold for plastic products. Background The double-color injection mold is a special mold technology for manufacturing plastic products composed of two different colors or different materials, and is used for injecting different materials (or different colors of the same material) twice on the same injection molding machine to finally form a part with a composite structure. The one side grinding apparatus of double-shot mold installs on rotatable template, after the membrane is divided to the first time moulding plastics, the template drives the membrane utensil and rotates 180, carry out the secondary and mould plastics, after the membrane is divided to the first time moulding plastics like this, when the membrane is divided to the template, in order to make the product of moulding plastics for the first time can smooth drawing of patterns, the product outer wall of moulding plastics for the first time can not have protruding or recess, the material of moulding plastics for the first time just receives certain restriction with the material of moulding plastics for the second time like this, only two kinds of materials have certain cohesiveness, just can be used for double-shot molding, the material of moulding plastics for the two times otherwise just has the possibility of coming off the separation, this very big practicality that has restricted double-shot molding. Disclosure of Invention Aiming at the defects of the prior art, the invention provides a double-color injection mold for plastic products. In order to achieve the aim, the invention provides the technical scheme that the double-color injection mold for the plastic product comprises a right mold and a left mold; The right mould includes right bedplate, and one side lateral wall fixedly connected with right apron of right bedplate, the groove of stepping down has been seted up to one side lateral wall of right apron, and the inslot of stepping down is provided with two half moulds, one side lateral wall of half mould is equal fixedly connected with connecting rod, and the one end of connecting rod runs through right apron and extends to right apron one side setting, and connecting rod one side that is located right apron one side is provided with promotes coupling assembling, one side lateral wall fixedly connected with spring leaf of half mould, and the one end fixedly connected with fixed plate of spring leaf, fixed plate and the inslot wall fixedly connected of stepping down, the die cavity has been seted up to one side lateral wall of right apron. Preferably, the pushing connection assembly comprises a push rod fixing rod penetrating through the right seat plate, one end of the push rod fixing rod is fixedly connected with a wedge block, one end of the connecting rod is fixedly connected with a connecting block, a rotary rod is rotatably connected to one side wall of the connecting block, and the rotary rod is arranged on one side of the wedge block. Preferably, the left side mould includes left bedplate, and one side lateral wall fixedly connected with left apron of left side bedplate, four fixed orificess have been seted up to one side lateral wall of left side apron, and the inner wall fixedly connected with round pin mould of fixed orificess, the inner wall sliding connection of round pin mould has the unloading ejector pin, and the outer wall cover of unloading ejector pin is equipped with compression spring, compression spring's one end and unloading ejector pin fixed connection, and compression spring's the other end and round pin mould fixed connection, one side lateral wall rotation of left side bedplate is connected with the fixing base, and one side lateral wall fixedly connected with guide block of fixing base, the one end of unloading ejector pin runs through left bedplate and extends to fixing base one side setting, one side of fixing base is provided with actuating mechanism. Preferably, the driving mechanism comprises a motor fixedly connected with the fixing seat, the driving end of the motor is fixedly connected with a gear, a ring tooth slot is formed in one side wall of the left seat plate, and the ring tooth slot is meshed with the gear. Preferably, a connecting plate is fixedly connected to one side wall of the right cover plate, a groove is formed in one side wall of the connecting plate, and an edge trimming knife is detachably connected to the inner wall of the groove. Preferably, a connecting shaft is fixedly connected to one side wall of the fixing seat, a bearing is fixedly sleeved on the outer wall of the connecting shaft, and the outer wall of the bearing is fixedly connected with the left seat plate. Preferably, a clamping groove is formed in one end of the blanking ejector rod, and a ball is arranged in the clamping groove. Preferably, a fixing