A mold structure for injection molding and assembly, in-mold assembly method

Abstract

A mold structure for injection molding and assembly and a method for in-mold assembly include: a fixed mold plate fixed with a fixed mold insert and a slider guide groove; a movable mold plate fixed with a movable mold insert; a floating plate floatingly assembled between the movable mold plate and the fixed mold plate through a guide column guide sleeve, the movable mold plate and the fixed mold plate pressing the floating plate when the mold is closed to make the fixed mold insert, the movable mold insert and the slider insert on the floating plate form a closed cavity; the slider insert drives the injection molded part formed in the closed cavity to move to the middle after the movable mold insert is avoided when the mold is opened to make the injection molded part snap assembly. The mold structure uses a movable mold floating core-pulling demolding mode after injection molding, drives the slider insert to move by using the mold opening force of an injection molding machine to realize the in-mold assembly of the injection molded part, forms an automatic circulation processing mode for the injection molding, in-mold assembly, ejection resetting and mold closing and injection molding processes, cancels the manual + tooling operation process and realizes the purpose of saving labor cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of injection mold, in particular to an injection molding and assembly mold structure and an in-mold assembly method. BACKGROUND

[0002] The wall pipe part is used for connecting the pipe and the through hole of the line between the indoor unit and the outdoor unit of the air conditioner during the installation of the air conditioner, and the through hole causes damage to the wall surface. At present, the part produced by the mold is in the form of two half-circular surfaces, and the two half-circular surfaces are spliced before leaving the factory. In order to avoid deformation during transportation and ensure the correct number of accessories, manual assembly is required before the part can be shipped and used. The existing injection mold can only produce single half-circular surface parts, and the assembly process requires one manual labor and one pneumatic tool, which wastes labor.

[0003] Chinese patent CN 110039273 A discloses an automatic assembly machine for a wall pipe assembly of an air conditioner, which comprises a moving assembly device, an auxiliary assembly device, a rotating feeding mechanism and a control device, and can realize full-automatic stacking, assembly and feeding, improve assembly efficiency, and improve factory efficiency and release labor cost. The patent is an automatic assembly machine, which belongs to the peripheral equipment of an injection molding machine. The wall pipe part is still produced by the original mold, and an external automatic assembly device is additionally added, which has high investment and operation cost.

[0004] Chinese patent CN 107639783 A discloses an injection mold and an in-mold assembly method. The injection mold comprises a movable mold assembly, a fixed mold assembly and an in-mold assembly assembly. The injection mold can assemble the first injection part and the second injection part in the mold, avoid the common warping deformation or shrinkage of secondary operation, and eliminate the waste caused by error processing, abnormal processing and other reasons. The patent is an air conditioner baffle part, and the in-mold assembly structure needs to use an oil cylinder as an external power source. During the mold opening and closing process, the mold needs to stop in order to complete the assembly and reset actions of the oil cylinder, which is low in efficiency. SUMMARY

[0005] In view of the high investment and operation cost and low efficiency of the mold in the prior art, the present application provides an injection molding and assembly mold structure and an in-mold assembly method. The opening force of the injection molding machine is used to drive the movement of the slider insert and the injection part, so that the assembly of the injection part in the mold is completed, and the injection molding and assembly processes are combined in one mold without the need for an external power source such as an oil cylinder.

[0006] To achieve the above-mentioned purpose, the present application selects the following technical scheme: an injection molding and assembly mold structure, comprising:

[0007] a fixed mold plate fixed with a fixed mold insert and a slider guide groove;

[0008] The movable die plate is fixed with a movable die insert;

[0009] The floating plate is movably assembled between the movable die plate and the fixed die plate by the guide column guide sleeve, and the movable die plate and the fixed die plate press the floating plate when the mold is closed to make the fixed die insert, the movable die insert and the slider insert on the floating plate form a closed cavity.

[0010] The slider insert drives the injection molded part formed in the closed cavity to move to the middle part after the movable die insert is avoided when the mold is opened to make the injection molded part snap-fit assembled.

[0011] Preferably, the two sides of the slider insert extend outwardly with a limiting boss, the floating plate is fixed with a pressing strip on both sides of the slider insert, a limiting step is arranged below the pressing strip and overlaps the limiting boss, and the two sides of the slider insert are further provided with a pressing rod and a roller arranged at the end of the pressing rod, the pressing rod is arranged on the pressing strip so that the pressing strip is between the limiting boss and the pressing rod.

[0012] Preferably, the slider insert moves to the middle part in the direction of mutual sliding of the limiting boss and the limiting step and is attached to the movable die insert when the mold is closed, and the movable die insert and the fixed die insert and the slider inserts on both sides form a first closed cavity and a second closed cavity when the mold is closed, and the first closed cavity and the second closed cavity are used for injection molding of the first injection molded part and the second injection molded part which can be assembled.

[0013] Preferably, the end of the slider insert away from the movable die insert is provided with an inclined pushing surface, and the fixed die plate is provided with an inclined pushing limiting block corresponding to the inclined pushing surface, so that the inclined pushing limiting block abuts against the inclined pushing surface to push the slider insert and the movable die insert and the fixed die insert to close to form a closed cavity when the mold is closed.

[0014] Preferably, the slider guide groove is arranged in the floating plate, one end of the slider guide groove is fixed on the fixed die plate, the other end of the slider guide groove extends towards the movable die plate and the end of the slider guide groove is inclined towards the middle part.

[0015] Preferably, the limiting pull rod is further included, one end of the limiting pull rod is fixed on the movable die plate or a movable die seat behind the movable die plate, the other end of the limiting pull rod is a limiting block, the floating plate is provided with a limiting groove corresponding to the position of the limiting block, and the limiting block and the limiting groove reserve a floating space for relative movement between the floating plate and the movable die plate in the movement direction of the floating plate.

[0016] Preferably, the floating elastic member is further included, the floating elastic member is assembled on the floating plate and makes the floating plate move away from or close to the fixed die plate under the pushing force of the floating elastic member or the external compression force in the floating space.

[0017] Preferably, the movable mold insert is provided with a ejector rod, one end of the ejector rod is connected with the fixed mold plate and the top plate, the other end of the ejector rod is used to be pushed out from the movable mold insert and abuts against the assembled injection molded part to make the injection molded part fall off from the slider insert.

[0018] In another aspect, the present application selects the following technical solution: an in-mold assembly method, which is realized by using the injection and assembly mold structure, comprising:

[0019] After the mold structure is closed, injection molded and cooled, an opening action is performed;

[0020] The movable mold plate retreats, the floating plate is kept close to the fixed mold plate by the pushing force of the floating elastic member and the reserved floating space, so that the slider insert and the fixed mold insert are not moved, and the movable mold insert retreats with the movable mold plate to make the bottom of the injection molded part avoid the space;

[0021] When the limiting block compresses the floating space to the limit, the floating plate is pulled back, the slider insert that retreats with the floating plate starts to move along the slider guide groove, the injection molded part moves away from the fixed mold insert with the slider insert, and the two injection molded parts start to move towards the middle part when the rollers of the slider insert slide to the inclined section of the slider guide groove;

[0022] When the rollers of the slider insert slide out of the slider guide groove, the two injection molded parts are assembled into an integral injection molded part by buckle assembly at the middle part, at this time, the top plate drives the ejector rod to eject from the fixed mold insert to the injection molded part and makes the injection molded part fall off from the slider insert;

[0023] After the ejector rod completes the ejection action, it is reset by the spring to prepare for the next closing action.

[0024] Preferably, the closing, injection molding and cooling forming comprises:

[0025] The injection molding machine starts the injection action, the mold structure is closed to form the first closed cavity and the second closed cavity and complete the injection molding and cooling forming, and the first injection molded part and the second injection molded part are obtained, the end parts of the first injection molded part and the second injection molded part that are close to each other are respectively provided with a clamping or buckling unit, the clamping or buckling unit is clamped or buckled when close to each other to make the two injection molded parts assembled into an integral injection molded part.

[0026] Preferably, in the opening action, the fixed mold plate retreats to drive the movable mold insert, the ejector rod and the limiting pull rod to retreat, the retreat of the limiting pull rod makes the limiting block compress the floating space in the limiting groove of the floating plate, when the limiting block compresses the floating space to the limit, the pulling force acting on the floating plate will overcome the pushing force of the floating elastic member to make the floating plate start to retreat with the movable mold plate;

[0027] The two side slider inserts on the floating plate and the two injection molded parts attached to the slider inserts start to separate from the fixed mold insert as the floating plate retreats, and the top of the injection molded parts is exposed from the fixed mold insert;

[0028] During the retreat of the left and right slider inserts, the rollers slide to the inclined section of the slider guide groove, and the left and right slider inserts move towards the middle in the floating plate and drive the first injection molded part and the second injection molded part to move towards each other. When the rollers slide to the bottom end of the slider guide groove or slide out, the first injection molded part and the second injection molded part are buckled and assembled in the middle, forming an integral injection molded part. Then, the top plate drives the ejector rod to eject from the fixed mold insert to the injection molded part and makes the injection molded part fall off from the slider insert.

[0029] Preferably, the spring resets the ejector rod after the ejection action is completed to prepare for the next mold closing, which includes:

[0030] After the top plate drives the ejector rod to complete the ejection action, the spring returns, and the injection molding machine starts the mold closing action again. As the movable mold plate starts to move towards the fixed mold plate, the rollers enter the slider guide groove and drive the slider insert to reset. The floating plate is pressed back to its original position by the fixed mold plate and stops at the movable mold plate. The movable mold insert forms a closed cavity with the slider insert and the fixed mold insert, completing the preparation work before the next injection molding.

[0031] Compared with the prior art, the present application has the following beneficial effects:

[0032] The present application uses mold opening action to complete assembly, and forms an automatic cycle processing mode for injection molding, in-mold assembly, ejection reset, mold closing and re-injection molding. The manual and tooling operation process is cancelled, achieving the purpose of saving labor costs. Compared with traditional technology, no additional peripheral machine equipment is needed, and the cost is lower. No oil cylinder is needed as a power source. The mold does not need to stop during the normal mold opening and closing action of the injection molding machine, and the in-mold assembly and reset can be completed. The mold cost is low and the efficiency is high.

[0033] The present application uses movable mold floating core pulling demolding mode after injection molding, uses the injection molding machine mold opening force to drive the slider insert to move and drive the injection molded part to complete the assembly of the injection molded part in the mold, achieving the effect of combining injection molding and assembly process in one mold without the need for additional external power sources such as oil cylinders. The entire production process adopts a recyclable mode of injection molding-in-mold assembly-resetting and re-mold production, which does not need the assistance of manual, robot, and tooling, realizes fully automatic closed-loop production, and achieves the purpose of saving space, labor, auxiliary machine, etc.

[0034] The application does not need external power source such as oil cylinder, the power source comes from the opening and closing mold force of injection molding machine, which can drive the movement of each part in the mold to complete the assembly of wall pipe parts and the reset of each part of the mold, and saves the cost. The full mechanical structure is used to optimize the oil cylinder and other structures, and the opening and closing mold assembly and reset action are not stopped, and the production efficiency is high. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0036] Figure 1 The structure diagram of the mold structure is expanded.

[0037] Figure 2 The structure diagram of the injection molded part is shown.

[0038] Figure 3 The structure diagram of the key part of the mold structure is shown.

[0039] Figure 4 The state diagram of the floating plate after injection molding without assembly is shown.

[0040] Figure 5 The state diagram of the floating plate when assembling the injection molded part is shown.

[0041] Figure 6 The state diagram of the key part of the mold structure after closing is shown.

[0042] Figure 7 The state diagram of the moving die insert separated from the bottom of the injection molded part is shown.

[0043] Figure 8 The state diagram of the injection molded part assembly is shown.

[0044] Figure 9 The state diagram of the ejector rod ejecting the injection molded part is shown.

[0045] The reference signs in the drawings represent:

[0046] 100: fixed mold plate, 110: fixed mold insert, 120: slider guide groove;

[0047] 200: moving mold plate, 210: moving mold insert; 220: limit pull rod, 230: moving mold base, 221: limit block;

[0048] 300: floating plate, 310: slider insert, 311: inclined pushing surface, 312: pressing rod, 313: roller, 314: limiting boss; 320: limiting column; 330: pressing strip; 331: limiting step; 340: limiting groove;

[0049] 400: top plate, 410: top rod;

[0050] 50: injection molded part, 51: first injection molded part, 52: second injection molded part, 53: clamping or buckling unit. DETAILED DESCRIPTION

[0051] In order to enable a clear, complete understanding of the technical solutions, the present application will be further described in conjunction with the embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the present application, and all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0052] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0053] It should also be understood that the terms used in the present application specification are only for the purpose of describing specific embodiments and are not intended to limit the present application. As used in the present application specification and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0054] It should be further understood that the term "and / or" used in the present application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0055] As Figures 1-9 shown, an injection molding and assembly mold structure comprises:

[0056] The fixed mold plate 100 is fixed with the fixed mold insert 110 and the slider guide groove 120;

[0057] The movable mold plate 200 is fixed with the movable mold insert 210;

[0058] The floating plate 300 is assembled between the movable die plate 200 and the fixed die plate 100 in a floating manner through the guide column guide sleeve, and the movable die plate 200 and the fixed die plate 100 press the floating plate 300 when the mold is closed to form a closed cavity on the fixed die insert 110, the movable die insert 210 and the floating plate 300; the slider insert 310 moves to the middle part after the molded part in the closed cavity is formed and the movable die insert 210 is avoided to make the molded part snap-fit assembled.

[0059] Specifically, the slider insert 310 is arranged in the floating plate 300, and the bottom of both sides extends outward to form a limiting boss 314, the floating plate 300 is fixed with a pressing strip 330 on both sides of the slider insert 310, the pressing strip 330 is provided with a limiting step 331 below and overlaps the limiting boss 314, the slider insert 310 is further provided with a pressing rod 312 and a roller 313 arranged at the end of the pressing rod 312, the pressing rod 312 is arranged on the pressing strip 330 so that the pressing strip 330 is between the limiting boss 314 and the pressing rod 312, the pressing strip 330 can effectively support the slider insert 310, and the limiting step 331 and the limiting boss 314 slide with each other to limit the movement of the slider insert 310, so that the slider insert only makes linear reciprocating motion on a horizontal plane of the floating plate.

[0060] The slider insert 310 slides to the middle part when the mold is closed and is attached to the movable die insert 210, and the movable die insert 210, the fixed die insert 110 and the slider inserts 310 on both sides form a first closed cavity and a second closed cavity when the mold is closed, and the first closed cavity and the second closed cavity are used for injection molding of the first injection molded part and the second injection molded part which can be assembled, as shown in the figure, the end of the first injection molded part 51 and the second injection molded part 52 is respectively provided with a clamping or buckling unit 53, and the clamping or buckling unit is clamped and buckled when they are close to each other to make the two injection molded parts assembled to form an integral injection molded part 50. The injection molded part of the embodiment is a wall pipe part which is used to connect the pipe and the line between the indoor unit and the outdoor unit of the air conditioner and to prevent the damage of the wall surface caused by the through hole, and after injection molding, the first injection molded part and the second injection molded part are obtained, which are two halves of semicircular surfaces and are buckled through the middle part to form an integral wall pipe whole circle part. Figure 2

[0061] ​The end of the sliding insert 310 away from the movable die insert 210 is provided with a inclined pushing surface 311, and the fixed die plate 100 is provided with a inclined pushing limiting block 130 corresponding to the inclined pushing surface 311, so that the inclined pushing limiting block 130 abuts against the inclined pushing surface 311 when the mold is closed, and the sliding insert 310 is pushed against the movable die insert 210 by the action of the inclined pushing surface 311, and the sliding insert 310 is pushed to always adhere to the end of the movable die insert 210, and then the fixed die plate 110 is closed to form a closed cavity. When the mold is closed, the floating plate 300 moves towards the fixed die plate 100, effectively pushing the sliding insert 310 towards the fixed die plate 110, and pressing the sliding insert 310 and the fixed die plate 110. The present embodiment further limits the adhesion of the sliding insert 310 and the movable die insert 210 by the inclined pushing limiting block 130, and further limits the adhesion of the sliding insert 310 and the fixed die plate 110 by the pressing strip 330, which effectively guarantees the sealing of the closed cavity when the mold is closed.

[0062] The sliding block guide groove 120 is arranged in the floating plate 300, one end is fixed on the fixed die plate 100, and the other end extends towards the movable die plate 200 and is inclined at the end towards the middle. The sliding insert 310 rolls in the sliding block guide groove 120 through the roller 313, and when the roller 313 moves to the inclined section of the sliding block guide groove 120, it drives the sliding insert 310 to move towards the middle on the floating plate. The floating plate is also provided with a limiting column 320 at the end of the movement direction of the sliding insert, which is used to limit the stroke of the sliding insert. The bottom of the sliding insert is also provided with a positioning groove and an elastic limiting steel ball (not shown in the figure), which has a positioning function when the sliding insert moves towards the middle for assembling injection molded parts. Specifically, when the roller 313 slides to the bottom end of the sliding block guide groove 120 or slides out of the sliding block guide groove 120, the positions of the two sliding inserts 310 are just moved to make the first injection molded part 51 and the second injection molded part 52 assembled to form an integral injection molded part 50. At this time, the positioning groove is located at the position of the elastic limiting steel ball and makes the elastic limiting steel ball pop up, so that the sliding insert 310 is positioned at this position. When the next mold closing action is completed, the roller of the sliding insert enters the sliding block guide groove and makes the sliding insert move towards both sides, the bottom surface of the sliding insert starts to press the spherical surface of the elastic limiting steel ball to make it out of the positioning groove, thereby releasing the positioning at this position. It should be noted that the hemispherical groove and the elastic limiting steel ball arranged at the bottom of the sliding insert are standard parts and conventional technology of the mold.

[0063] The mold structure further comprises a limiting pull rod 220, one end of which is fixed on the movable die holder 230 behind the movable die plate 200, and the other end is a limiting protrusion 221, the floating plate 300 is provided with a limiting groove 340 corresponding to the position of the limiting protrusion 221, and the limiting protrusion 221 and the limiting groove 340 reserve a floating space between the floating plate 300 and the movable die plate 200 in the movement direction of the floating plate 300.

[0064] The mold structure further comprises a floating elastic member (not shown in the figure), which is assembled on the floating plate 300 and makes the floating plate 300 move away from or close to the fixed die plate 20 in the floating space under the pushing force of the floating elastic member or the external compression force.

[0065] The movable die insert 210 is provided with a ejector rod 410 in the middle, one end of which passes through the fixed die plate 200 and is connected with the top plate 400, and the other end is used to be pushed by the top plate 400 to extend from the movable die insert 210 and abut against the assembled injection molded part to make the injection molded part fall off from the slider insert 310.

[0066] The embodiment utilizes mold opening action to complete assembly, and forms an automatic circulation processing mode for injection molding, in-mold assembly, ejection reset, mold closing and re-injection molding, cancels the operation process of manual + tooling, and realizes the purpose of saving labor cost. Compared with the traditional technology, no additional peripheral machine equipment is needed, the cost is low; no oil cylinder is needed as power source, only the mold opening and closing actions of the conventional injection molding machine are needed, and the mold does not need to stop during the process to complete the in-mold assembly and reset, so that the mold cost is low and the efficiency is high.

[0067] The embodiment also provides an in-mold assembly method, which comprises:

[0068] The injection molding machine starts the injection molding action, the mold structure is closed to form a first closed cavity and a second closed cavity, and the injection molding and cooling molding are completed, so that a first injection molded part and a second injection molded part are obtained, the ends of the first injection molded part and the second injection molded part close to each other are respectively provided with a clamping or buckling unit, and the clamping or buckling unit is clamped and buckled to combine when close to each other, so that two injection molded parts are assembled to form an integral injection molded part. Figure 6 The mold structure in the state of the key part after mold closing is shown, and the mold opening action is performed after the mold structure is closed, injection molded and cooled.

[0069] In the mold opening action, the movable die plate retreats, the fixed die plate retreats to drive the movable die insert 210, the ejector rod 410 and the limiting pull rod to retreat, the floating plate keeps close to the fixed die plate under the pushing force of the floating elastic member and the reserved floating space, so that the slider insert 310 and the fixed die insert 110 are not moved, as shown in Figure 7The moving mold insert of the mold structure shown is separated from the bottom of the injection molded part, and the moving mold plate retreats to make the bottom of the injection molded part empty.

[0070] The limiting pull rod retreats with the fixed mold plate to make the limiting block compress the floating space in the limiting slot of the floating plate. When the limiting block compresses the floating space to the limit, the pulling force acting on the floating plate will overcome the pushing force of the floating elastic member, and then make the floating plate retreat with the fixed mold plate. The pulling of the floating plate starts to retreat, and the two side slider inserts on the floating plate and the two injection molded parts adsorbed on the slider inserts start to separate from the fixed mold insert as the floating plate retreats, and the top of the injection molded part is separated from the fixed mold insert and exposed.

[0071] The slider insert starts to move along the slider guide slot as the floating plate retreats. In the process of the left and right slider inserts retreating, the rollers slide to the inclined section of the slider guide slot, and the left and right slider inserts 310 move towards the middle in the floating plate and drive the first injection molded part and the second injection molded part to move towards each other. At this time, the two slider inserts are always kept in relative motion in the floating plate due to the limiting boss and the limiting step. As shown in Figure 8 The assembled state of the injection molded parts. When the roller 313 slides to the bottom end of the slider guide slot 120 or slides out, the first injection molded part and the second injection molded part are buckled and assembled at the middle, and an integral injection molded part 50 is assembled. At this time, the slider insert is positioned at this position due to the positioning slot and the elastic limiting ball. As shown in Figure 9 The state of the ejector rod ejecting the injection molded part. The ejection force is provided by the injection molding machine, the top plate drives the ejector rod 410 to eject from the fixed mold insert 210 to the injection molded part and make the injection molded part 50 fall off from the slider insert 310. After the ejector rod completes the ejection action, it is reset by the spring.

[0072] Prepare for the next clamping action. After the top plate drives the ejector rod to complete the ejection action, it is returned by the spring. The injection molding machine starts the clamping action again. As the moving mold plate starts to move towards the fixed mold plate, the roller always remains at the end or outlet of the slider guide slot due to the positioning of the slider insert in the positioning slot and the elastic limiting ball. When the floating plate moves towards the fixed mold plate, the roller enters the slider guide slot and drives the slider insert to move. The slider insert compresses the elastic limiting ball when moving towards the two sides to make it disengage from the positioning slot. The slider insert is reset, the floating plate is pressed back to the original position by the fixed mold plate, and the moving mold insert, the slider insert and the fixed mold insert form a closed cavity to complete the preparation work before the next injection molding.

[0073] The embodiment adopts a movable mold floating core-pulling demolding mode after injection molding, uses the mold opening force of an injection molding machine to drive the movement of a slider insert and the injection molded part to realize the assembly of the injection molded part in the mold, and achieves the effect that injection molding and assembly process are combined in one mold and can be completed without increasing external power sources such as oil cylinders and gas cylinders. The whole production process adopts a recyclable mode of injection molding-in-mold assembly-resetting-remodeling production, does not need the assistance of manual work, robots, and tooling, realizes fully automatic closed-loop production, and achieves the purpose of saving costs such as site, labor, and auxiliary machines.

[0074] The embodiment does not need external power sources such as oil cylinders and gas cylinders, the power source comes from the mold opening and closing force of the injection molding machine, can drive the movement of each part in the mold to complete the assembly of the wall pipe part and the resetting of each part of the mold, and achieves the purpose of saving costs. The all-mechanical structure optimizes the structure of oil cylinders and gas cylinders, realizes uninterrupted mold opening, assembly, and resetting actions, and has high production efficiency.

[0075] The above disclosure is only one or more of the preferred embodiments of the present application, which is used to help understand the inventive concept of the technical solution, and does not limit the present application in other forms. According to the limited features of the present application, the skilled in the art can make other equivalent or conventional means of replacement scheme, which still belongs to the scope covered by the present application.

Claims

1. An injection molding and assembly mold structure characterized by The utility model relates to a kind of injection and assembly mould structure, including: Fixed die plate, fixed with fixed die insert and slider guide groove; Movable die plate, fixed with movable die insert; Floating plate, floatingly assembled between the movable die plate and the fixed die plate by guide column guide sleeve, the movable die plate and fixed die plate press the floating plate when clamping to make the fixed die insert, movable die insert and slider insert on the floating plate form closed cavity;The slider guide groove is placed in the floating plate, one end is fixed on the fixed die plate, the other end extends towards the movable die plate and the end is inclinedly arranged towards the middle; The slider insert drives the injection molded part formed in closed cavity to move towards the middle after movable die insert avoids when mold is opened to make injection molded part snap-fit assembly; The bottom of the slider insert extends outwardly to limit boss on both sides, the floating plate is fixed with pressing strip on both sides of the slider insert, the pressing strip is provided with limit step below and overlaps on the limit boss, the slider insert is also provided with pressing rod and roller arranged at the end of the pressing rod, the pressing rod is arranged on the pressing strip so that the pressing strip is between the limit boss and the pressing rod.

2. A molded and assembled mold structure according to claim 1, characterized in that: The slider insert moves towards the middle in the direction that limit boss and limit step slide mutually when the mould is closed and fits with the movable die insert, the movable die insert and fixed die insert and slider insert on both sides form first closed cavity and second closed cavity when clamping, and the first closed cavity and the second closed cavity are used for injection molding first injection molded part and second injection molded part that can be assembled.

3. A molded and assembled mold structure according to claim 1, wherein: The end of the slider insert away from the movable die insert is provided with a inclined pushing surface, and the fixed die plate is provided with a inclined pushing limiting block corresponding to the inclined pushing surface, so that the inclined pushing limiting block abuts against the inclined pushing surface to push the slider insert, the movable die insert and the fixed die insert to close and form the closed cavity when the mould is closed.

4. The injection molded and assembled mold structure of claim 1, wherein: It also includes a limiting pull rod, one end of the limiting pull rod is fixed on the movable die plate or the movable die seat behind the movable die plate, and the other end is a limiting protrusion, the floating plate is provided with a limiting groove corresponding to the position of the limiting protrusion, and the limiting protrusion and the limiting groove reserve a floating space for the relative movement between the floating plate and the movable die plate in the movement direction of the floating plate.

5. A mould structure for injection moulding and assembly according to claim 4, characterised in that: It also includes a floating elastic member, the floating elastic member is arranged on the floating plate and makes the floating plate move away from or close to the fixed die plate under the pushing force of the floating elastic member or external compression force in the floating space.

6. The injection molded and assembled mold structure of claim 1, wherein: The movable die insert is provided with a ejector rod in the middle, one end of the ejector rod penetrates through the fixed die plate and is connected with the ejector plate, and the other end is used to be pushed out of the movable die insert by the ejector plate and abuts against the assembled injection molded part to make the injection molded part fall off from the slider insert.

7. A method of in-mold assembly, characterized by: The in-mould assembly method is realized by using the injection and assembly mould structure of any one of claims 1 to 6, including: After the mould structure is clamped, injection is cooled and formed, the mold opening action is performed; The movable die plate retreats, the floating plate keeps close to the fixed die plate under the pushing force of the floating elastic member and the reserved floating space, so that the slider insert and the fixed die insert do not move, and the movable die insert retreats with the movable die plate to make the bottom of the injection molded part avoid; When the limit bump compresses the floating space to the limit, pull the floating plate back, the slider insert begins to move along the slider guide groove, the injection parts move away from the fixed mold insert with the slider insert, the two injection parts begin to move towards the middle when the roller of the slider insert slides to the inclined section of the slider guide groove; When the roller of the slider insert slides out of the slider guide groove, the two injection parts complete the buckle assembly at the middle to form an integral injection part, at this time the top plate drives the ejector rod to eject from the fixed mold insert to the injection part and makes the injection part fall off from the slider insert; The ejector rod completes the ejecting action and is reset by the spring to prepare for the next clamping action.

8. A method of in-mold assembly according to claim 7, wherein, The clamping injection cooling forming includes: The injection machine starts the injection action, the mold structure is clamped to form the first closed cavity and the second closed cavity and complete the injection cooling forming, and the first injection part and the second injection part are obtained, the end of the first injection part and the second injection part is respectively provided with a clamping or buckling unit, and the clamping or buckling unit is clamped or buckled when it is close to each other to make the two injection parts assembled to form an integral injection part.

9. The in-mold assembly method of claim 7, wherein: In the opening action, the fixed mold plate retreats to drive the movable mold insert, the ejector rod and the limit pull rod to retreat, the limit pull rod retreats to make the limit bump compress the floating space in the limit groove of the floating plate, when the limit bump compresses the floating space to the limit, the pulling force acting on the floating plate will overcome the pushing force of the floating elastic element to make the floating plate retreat with the movable mold plate; The two slider inserts on the floating plate and the two injection parts adsorbed on the slider inserts begin to separate from the fixed mold insert when the floating plate retreats, and the top of the injection part is separated from the fixed mold insert to be exposed; In the process of the retreat of the left and right slider inserts, the roller slides to the inclined section of the slider guide groove, the left and right slider inserts move towards the middle in the floating plate and drive the first injection part and the second injection part to move towards each other, when the roller slides to the bottom end of the slider guide groove or slides out, the first injection part and the second injection part are clamped and assembled at the middle to form an integral injection part, and then the top plate drives the ejector rod to eject from the fixed mold insert to the injection part and makes the injection part fall off from the slider insert.

10. The method of in-mold assembly of claim 7, wherein, The ejector rod completes the ejecting action and is reset by the spring to prepare for the next clamping includes: The top plate drives the ejector rod to complete the ejecting action and is reset by the spring, the injection machine starts the clamping action again, the roller enters the slider guide groove with the movement of the movable mold plate to the fixed mold plate, the slider insert is reset, the floating plate is pressed back to the original position by the clamping action of the fixed mold plate, the movable mold insert, the slider insert and the fixed mold insert form a closed cavity, and the preparation work before the next injection forming is completed.

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