A laminated mold adopting single hot runner one-way injection

Abstract

The utility model discloses a laminated mould of single set hot runner one-way glue injection, including front mould plate, middle mould plate, back mould plate, hot runner system and cooling mechanism, and hot runner system includes shunt plate, hot nozzle and runner pipe, and the front and rear layers of middle mould plate are equipped with front cavity and rear cavity respectively, and the one side of front mould plate to middle mould plate and the one side of back mould plate to middle mould plate are equipped with cavity respectively, short hot nozzle extends to front cavity, and long hot nozzle extends to rear cavity, and is used for forming front row product and rear row product respectively, and realizes the pre -locking of front mould plate and middle mould plate through pre -lock mould mechanism between runner mounting panel and middle mould plate. Like this can ensure that only after back mould plate and middle mould plate open mould, middle mould plate can be with front mould plate mould, thereby realize laminated mould's stable and orderly opening mould. Not only has saved the complex connection of using rack gear etc. as transmission structure, has simplified mould structure, and hot runner system does not need activity, will not produce abrasion, has increased the life.

Description

Technical Field

[0001] This utility model relates to the field of mold product technology, and in particular to a stacked mold for molding products with hollowed-out structures. Background Technology

[0002] Stacked molds are a relatively advanced mold technology. Unlike ordinary injection molds, they can mold multiple products simultaneously, with the cavities of these products distributed across two or more layers in an overlapping arrangement. Existing stacked molds are typically divided into three independent parts: the A-type core mold is fixed to the fixed mold platen of the injection molding machine by a locking module, and the B-type core mold is fixed to the moving mold platen of the injection molding machine by a locking module, as illustrated by the self-supporting precision stacked mold disclosed in Chinese Utility Model Patent CN113601795A. However, existing stacked molds of this type usually employ a structure where the middle section and the two side sections can move relative to each other to achieve mold opening and closing. The side sections and the middle section often use a rack and pinion gear mechanism to achieve this relative movement, resulting in a complex structure. Furthermore, the hot runner must enter the mold from one side, be introduced into the middle section, and then pass through the middle section to reach each layer for injection. Because the middle section and the two side sections must be able to move relative to each other, the hot runner must be designed as a separate structure; that is, the hot runner introduced from one side and the hot runner in the middle section must be designed as separate structures to meet the mold opening requirements of the stacked mold. The hot runner of this traditional stacked mold needs to be opened and closed frequently during the mold opening and closing process, which can easily lead to wear and leakage of glue over time. Utility Model Content

[0003] This utility model addresses the shortcomings of existing technologies by providing a stacked mold with a single hot runner unidirectional injection, which features a simpler structure, a more reasonable design, no need for opening and closing of the hot runner, no wear, and a longer service life. It is mainly used for molding products with hollow structures.

[0004] To solve the above technical problems, this utility model adopts the following technical solution: a stacked mold using a single set of hot runner unidirectional injection molding, comprising a front mold plate, a middle mold plate, a rear mold plate, a hot runner system, and a cooling mechanism. The hot runner system includes a manifold, hot nozzles, and runner pipes. The middle mold plate is movably installed behind the front mold plate, and the rear mold plate is movably installed behind the middle mold plate. The front and rear layers of the middle mold plate are respectively provided with a front cavity and a rear cavity, and the hollowed-out parts of the corresponding products in the front cavity and the rear cavity are staggered. The side of the front mold plate facing the middle mold plate is provided with a cavity that matches the front cavity. The rear template has a cavity that matches the rear cavity on the side facing the middle template. The hot runner system is combined with the front template through the runner mounting plate. The hot nozzles include hot nozzles of different lengths. The shorter hot nozzles extend through the front template to the front cavity, and the longer hot nozzles extend through the front template and the middle template to the rear cavity. The front cavity and the cavity of the front template form the front row of products, and the rear cavity and the cavity of the rear template form the rear row of products. A pre-locking mechanism is provided between the runner mounting plate and the middle template to achieve pre-locking of the front template and the middle template.

[0005] Furthermore, the pre-locking mechanism includes several mold-opening locks, each including a locking rod, a locking seat, and a locking hook. The locking seat is assembled and fixed to the runner mounting plate, the locking rod is assembled and fixed to the middle template, and the locking hook is movably installed in the locking hole of the locking seat. The locking head of the locking rod is inserted into the locking hole of the locking seat and engages with the hook of the locking hook to achieve pre-locking of the middle template. The part where the locking head and the hook of the locking hook cooperate is an arc-shaped edge. By pulling the locking rod through the middle template, the arc-shaped edge of the locking head is disengaged from the hook of the locking hook to unlock the middle template.

[0006] Furthermore, it also includes a guide pull limiting mechanism, which includes a limiting pull rod and a limiting post. The limiting pull rod is assembled and fixed with the rear template. A limiting slot is provided in the limiting pull rod along the mold opening direction. The limiting post is fixed on the middle template and extends outward and is inserted into the limiting slot of the limiting pull rod. When the rear template opens the mold, it pulls the limiting pull rod backward and pulls the middle template backward to open the mold when the limiting post enters the front end of the limiting slot.

[0007] Furthermore, a cylinder mounting plate is provided in front of the runner mounting plate for mounting the runner cylinder of the hot runner system. The runner pipe passes through the cylinder mounting plate and extends out of the mold. A limit clamp is fixed on the inner side of the front end of the limit tie rod. A limit base is provided on the side wall of the middle template in front of the limit post. Slots matching the limit clamp are respectively provided on the outer side wall of the cylinder mounting plate and the limit base. The limit clamp is snapped into the slots on the cylinder mounting plate or the limit base to achieve mold closing positioning or mold opening positioning.

[0008] Furthermore, the pre-locking mechanism includes several opening and closing devices, each of which is installed on the middle template. When the mold is closed, the opening and closing devices are inserted into the front template to achieve auxiliary pre-locking of the middle template and the front template.

[0009] Furthermore, the rear mold plate is installed and fixed on a rear mold fixing plate, and the rear mold fixing plate is equipped with a rear air ejector mechanism, which is connected to the cavity of the rear mold plate to form a demolding structure for the rear products; an air vent screw is provided in the rear mold plate, which passes through the rear mold plate and is connected to the cavity of the rear mold plate, and a groove is provided on the back of the rear mold plate to connect the air vent screw to the outside; a front air ejector mechanism is installed in the middle mold plate, which is connected to the front cavity of the middle mold plate to form a demolding structure for the front products.

[0010] Furthermore, cooling mechanisms are provided in the front template, middle template, rear template, and cylinder mounting plate, with the cooling mechanisms of the front template and middle template including at least two rows of cooling water channels.

[0011] Furthermore, the front template, middle template, rear template, rear mold fixing plate, runner mounting plate, and cylinder mounting plate are connected together by several guide post sleeve assemblies. The rear mold fixing plate is fixedly connected to the guide posts of the guide post sleeve assembly, and the front template, middle template, rear template, runner mounting plate, and cylinder mounting plate are respectively connected to the corresponding sleeves of the guide post sleeve assembly. Several guide rods are fixed in the front template, and the middle template is movably assembled with the guide rods through guide sleeves.

[0012] Furthermore, a hot nozzle hole is provided in the front cavity of the middle template corresponding to the hollow part of the front row of products for a longer hot nozzle to pass through; the longer hot nozzle is connected to an air blowing pipe, which is led out from the middle template.

[0013] Furthermore, detachable mold buckles are fixed on the outer walls of the front and rear templates, and the front, middle and rear templates are locked by installing the mold buckles; a positioning ring is provided on the cylinder mounting plate.

[0014] This invention utilizes the cooperation of a front template, a middle template, and a rear template. The front template is assembled with the hot runner system to form a fixed component structure, while the middle and rear templates are movable structures. A pre-locking mechanism pre-locks them with the front template, ensuring that the middle template can only engage with the front template after the rear and middle templates have opened. This achieves smooth and orderly mold opening of the stacked mold. Firstly, this eliminates the need for complex connections using racks and pinions as transmission structures, significantly simplifying the mold structure. Secondly, the hot runner system does not require movement; hot nozzles of different lengths separately inject glue into the front and rear rows of products. It does not require a split structure and is similar to the hot runner system of ordinary molds, thus preventing wear and increasing the mold's service life. Attached Figure Description

[0015] Figure 1This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the overall structure of this utility model from another angle;

[0017] Figure 3 This is a schematic diagram of the structure of this utility model after the cylinder mounting plate has been removed;

[0018] Figure 4 This is a schematic diagram of the structure of this utility model after the removal of the rear mold fixing plate;

[0019] Figure 5 This is a schematic diagram of the structure of this utility model after the rear mold fixing plate and rear template are removed;

[0020] Figure 6 This is a schematic diagram of the structure of this utility model after the rear mold fixing plate, rear template and middle template are removed;

[0021] Figure 7 This is a schematic diagram of the structure of this utility model after the template has been removed;

[0022] Figure 8 This is a schematic diagram of the structure of this utility model after the template has been removed;

[0023] Figure 9 This is a schematic diagram of the structure of the product after the hot runner system has been molded.

[0024] Figure 10 This is a schematic diagram of the hot runner system.

[0025] Figure 11 This is a structural diagram of the template.

[0026] Figure 12 This is a structural diagram of the template from another angle;

[0027] Figure 13 This is a schematic diagram of the mold opening lock structure;

[0028] Figure 14 This is an exploded view of the mold opening lock.

[0029] Figure 15 For guide and limit mechanism.

[0030] In the diagram, A represents the front row of products, B represents the rear row of products, 1 is the front mold plate, 2 is the middle mold plate, 21 is the front cavity, 22 is the rear cavity, 23 is the hot runner nozzle, 24 is the clearance groove, 25 is the opening / closing device, 26 is the guide rod, 27 is the guide sleeve, 28 is the front air ejector mechanism, 3 is the rear mold plate, 31 is the rear mold fixing plate, 32 is the rear air ejector mechanism, 33 is the vent screw, 4 is the hot runner system, 41 is the manifold plate, 42 is the runner cylinder, 43 is the runner pipe, and 44 is the short... 45 is a long hot nozzle, 46 is an air blowing pipe, 47 is a runner mounting plate, 48 is a cylinder mounting plate, 5 is a mold opening lock, 51 is a locking rod, 52 is a lock head, 53 is a lock seat, 54 is a lock hole, 55 is a lock hook, 56 is a hook part, 6 is a guide pull limiting mechanism, 61 is a limiting pull rod, 62 is a limiting clamp, 63 is a limiting base, 64 is a limiting post, 65 is a limiting slot, 7 is a cooling water channel, 8 is a guide post sleeve assembly, 9 is a positioning ring, and 10 is a mold buckle. Detailed Implementation

[0031] In this embodiment, refer to Figures 1-15 The stacked mold employing a single-set hot runner unidirectional injection system includes a front mold plate 1, a middle mold plate 2, a rear mold plate 3, a hot runner system 4, and a cooling mechanism. The hot runner system 4 includes a manifold plate 41, hot nozzles, and runner pipes 43. The middle mold plate 2 is movably installed behind the front mold plate 1, and the rear mold plate 3 is movably installed behind the middle mold plate 2. The front and rear surfaces of the middle mold plate 2 are respectively provided with a front cavity 21 and a rear cavity 22. The cutout parts of corresponding products (such as carrier tape trays) in the front cavity 21 and the rear cavity 22 are staggered. The side of the front mold plate 1 facing the middle mold plate 2 is provided with a cavity that matches the front cavity 21, and the side of the rear mold plate 3 facing the middle mold plate 2 is provided with a cavity that matches the rear cavity 22. The hot runner system 4 is connected to the front mold plate 1 via a runner mounting plate 47. Together, they form an integral component. The hot nozzles include nozzles of different lengths. The shorter nozzle (i.e., short nozzle 44) extends through the front template 1 to the front cavity 21, used to mold the front row of products A. The longer nozzle (i.e., long nozzle 45) extends sequentially through the front template 1 and the middle template 2 to the rear cavity 22, used to mold the rear row of products B. The front cavity 21 and the cavity of the front template 1 are used to mold the front row of products A, and the rear cavity 22 and the cavity of the rear template 3 are used to mold the rear row of products B. A pre-locking mechanism is provided between the runner mounting plate 47 and the middle template 2. The pre-locking mechanism achieves pre-locking of the front template 1 and the middle template 2 to realize the orderly mold opening process, that is, the rear template 3 is opened first, and the middle template 2 and the front template 1 remain temporarily stationary. After the rear template 3 is opened, the middle template 2 is pulled to open the mold, while the front template 1 remains stationary.

[0032] Reference Figure 1 , Figure 13 and Figure 14The pre-locking mechanism includes four sets of mold-opening locks 5. Each mold-opening lock 5 includes a locking rod 51, a locking seat 53, and a locking hook 55. The locking seat 53 is assembled and fixed to the outer wall of the flow channel mounting plate 47. The locking rod 51 is fixed in the clearance groove 24 of the middle template 2. The locking hook 55 is movably installed in the locking hole 54 of the locking seat 53. The locking head 52 of the locking rod 51 is inserted into the locking hole 54 of the locking seat 53 and engages with the hook part 56 of the locking hook 55 to achieve pre-locking of the middle template 2, so that the middle template 2 will not retract and open the mold after being slightly pulled. The part where the locking head 52 and the hook part 56 of the locking hook 55 cooperate is an arc edge. This allows the arc edge of the locking head 52 to disengage more smoothly from the hook part 56 of the locking hook 55 when the middle template 2 pulls the locking rod 51, thereby unlocking the middle template 2. At this time, the middle template 2 can retract and open the mold.

[0033] Reference Figure 1 and Figure 15 It also includes a guide pull limiting mechanism 6, which includes a limiting pull rod 61 and a limiting post 64. The limiting pull rod 61 is assembled and fixed with the rear template 3. A limiting slot 65 is provided in the limiting pull rod 61 along the mold opening direction. The limiting post 64 is fixed on the middle template 2 and extends outward and is inserted into the limiting slot 65 of the limiting pull rod 61. When the rear template 3 opens the mold, it pulls the limiting pull rod 61 backward and when the limiting post 64 enters the front end of the limiting slot 65, it will pull the middle template 2 backward as well, thereby realizing the mold opening.

[0034] Reference Figure 1 , Figure 2 and Figure 3 A cylinder mounting plate 48 is provided in front of the runner mounting plate 47 for mounting the runner cylinder 42 of the hot runner system 4. The runner pipe 43 passes through the cylinder mounting plate 48 and extends out of the mold. A limit clamp 62 is fixed on the inner side of the front end of the limit rod 61. A limit base 63 is provided on the side wall of the middle template 2 in front of the limit post 64. Slots matching the limit clamp 62 are respectively provided on the outer side wall of the cylinder mounting plate 48 and the limit base 63. When the mold is closed, the limit clamp 62 is engaged in the slot of the cylinder mounting plate 48 for auxiliary positioning. When the mold is opened, the limit clamp 62 moves to be opposite to the limit base 63 and engages in the slot on the limit base 63 to achieve auxiliary positioning after the mold is opened.

[0035] Reference Figure 7 and Figure 8The pre-locking mechanism includes four opening / closing devices 25, each mounted on the middle mold plate 2. In the closed mold state, the opening / closing devices 25 are inserted into the front mold plate 1. The friction of the opening / closing devices 25 assists in pre-locking the middle mold plate 2 and the front mold plate 2. This, in conjunction with the mold opening lock 5, ensures that the rear mold plate 3 opens first, followed by the middle mold plate 2; otherwise, mold opening would be impossible. After the rear mold plate 3 has opened, the middle mold plate 2 is pulled back by the limiting rod 61. This overcomes the friction of the opening / closing devices 25 and the pulling force of the locking hook 55 on the locking head 52, thus separating the middle mold plate 2 from the front mold plate 1.

[0036] Reference Figure 1 , Figure 2 , Figures 4-6 The rear mold plate 3 is fixedly mounted on a rear mold fixing plate 31. A rear air ejector mechanism 32 is installed in the rear mold fixing plate 31, and the rear air ejector mechanism 32 is connected to the cavity of the rear mold plate 3 for demolding the rear product B. An exhaust screw 33 is provided in the rear mold plate 3, passing through the rear mold plate 3 and connecting to its cavity. A groove is provided on the back of the rear mold plate 3 to connect the exhaust screw 33 to the outside, for venting gas from the cavity. A front air ejector mechanism 28 is installed in the middle mold plate 2, and the front air ejector mechanism 28 is connected to the front cavity 21 of the middle mold plate 2 for demolding the front product A. After the rear mold plate 3 and the middle mold plate 2 are opened, a robot arm extends into the mold to pick up the front product A and the rear product B respectively. Compressed air is introduced through the front air ejector mechanism 28 and the rear air ejector mechanism 32 to blow the products out of the cavity, thus achieving demolding. The robot arm then lifts up and removes the products.

[0037] Reference Figure 1 , Figure 3 and Figure 4 Cooling mechanisms are provided in the front template 1, middle template 2, rear template 3 and cylinder mounting plate 48. The cooling mechanisms of the front template 1 and middle template 2 include two rows of cooling water channels 7 to ensure cooling effect.

[0038] Reference Figures 3-6 The front mold plate 1, middle mold plate 2, rear mold plate 3, rear mold fixing plate 31, runner mounting plate 47, and cylinder mounting plate 48 are connected together by four sets of guide post sleeve assemblies 8. The rear mold fixing plate 31 is fixedly connected to the guide posts of the guide post sleeve assembly 8, and the guide posts can move synchronously with the rear mold fixing plate 31. The front mold plate 1, middle mold plate 2, rear mold plate 3, runner mounting plate 47, and cylinder mounting plate 48 are respectively connected to the corresponding sleeves of the guide post sleeve assembly 8, so that they can move relative to the guide posts. Several guide rods 26 are fixed in the front mold plate 1, and the middle mold plate 2 is movably assembled with the guide rods 26 through guide sleeves 27. This can play a stable guiding role when the middle mold plate 2 is opened, so that the two can maintain stable opening for a long time.

[0039] Reference Figure 11 and Figure 12In the front cavity 21 of the middle template 2, a hot nozzle hole 23 is provided for the hollow part corresponding to the front row product A to pass through the long hot nozzle 45; the long hot nozzle 45 is also connected to an air blowing pipe 46, which is led out from the middle template 2 to clean foreign objects from the sheath of the long hot nozzle 45, ensuring that the inside is clean and avoiding damage to the mold.

[0040] Reference Figure 2 A detachable mold buckle 10 is fixed on the outer side wall of the front template 1 and the rear template 3. The front template 1, the middle template 2 and the rear template 3 are locked by installing the mold buckle 10 to prevent the mold from being accidentally separated and damaged during transportation and hoisting. The mold buckle 10 is removed when in use. A positioning ring 9 is set on the cylinder mounting plate 48 to ensure accurate mold positioning.

[0041] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A laminated mold using a single hot runner one-way injection, comprising a front mold plate, a middle mold plate, a back mold plate, a hot runner system and a cooling mechanism, the hot runner system comprising a flow distribution plate, a hot nozzle and a flow channel pipe, characterized in that: The middle mold plate is movably installed behind the front mold plate, and the rear mold plate is movably installed behind the middle mold plate, the front and rear surfaces of the middle mold plate are respectively provided with a front cavity and a rear cavity, and the hollow parts corresponding to the products in the front cavity and the rear cavity are staggered with each other; one surface of the front mold plate facing the middle mold plate is provided with a cavity matched with the front cavity, and one surface of the rear mold plate facing the middle mold plate is provided with a cavity matched with the rear cavity; the hot runner system is combined with the front mold plate through a runner installation plate, the hot nozzle includes hot nozzles with different lengths, the hot nozzle with a smaller length extends to the front cavity through the front mold plate, and the hot nozzle with a larger length extends to the rear cavity through the front mold plate and the middle mold plate in turn; the front cavity and the cavity of the front mold plate form a front row of products, and the rear cavity and the cavity of the rear mold plate form a rear row of products; a pre-locking mechanism is arranged between the runner installation plate and the middle mold plate, and the pre-locking mechanism is used for pre-locking the front mold plate and the middle mold plate.

2. The laminated mold using a single hot runner one-way injection of claim 1, wherein: The pre-locking mechanism includes a plurality of mold opening locks, the mold opening lock includes a lock rod, a lock seat and a lock hook, the lock seat is assembled and fixed with the runner installation plate, the lock rod is assembled and fixed with the middle mold plate, the lock hook is movably installed in the lock hole of the lock seat, the lock head at the head of the lock rod is inserted into the lock hole of the lock seat and buckled with the hook part of the lock hook to pre-lock the middle mold plate; the part matched with the hook part of the lock head and the lock hook is an arc-shaped edge, and the arc-shaped edge of the lock head is separated from the hook part of the lock hook by pulling the lock rod through the middle mold plate to unlock the middle mold plate.

3. The laminated mold using a single hot runner one-way injection according to claim 1 or 2, characterized in that: The guide-pulling limiting mechanism includes a limiting pulling rod and a limiting column, the limiting pulling rod is assembled and fixed with the rear mold plate; the limiting slot hole is arranged in the limiting pulling rod in the mold opening direction, the limiting column is fixed on the middle mold plate and outwardly extends and is inserted into the limiting slot hole of the limiting pulling rod, and the rear mold plate pulls back the limiting pulling rod to retreat and pulls back the middle mold plate to open the mold when the limiting column enters the front end of the limiting slot hole.

4. The stack mold using a single hot runner one-way injection of claim 3, wherein: A cylinder installation plate is arranged in front of the runner installation plate and is used for installing the runner cylinder of the hot runner system, the runner pipe passes through the cylinder installation plate and leads out of the mold, a limiting clamp is fixed on the inner side of the front end of the limiting pulling rod, a limiting base is arranged on the sidewall of the middle mold plate at a position in front of the limiting column, and a groove matched with the limiting clamp is arranged on the outer sidewall of the cylinder installation plate and the limiting base respectively, the limiting clamp is buckled into the groove on the cylinder installation plate or the limiting base respectively to realize the clamping positioning or the mold opening positioning.

5. The stack mold with single hot runner and single injection of claim 2, wherein: The pre-locking mechanism includes a plurality of openers, each opener is installed on the middle mold plate, and the opener is inserted into the front mold plate in the clamped state to pre-lock the middle mold plate and the front mold plate.

6. The stack mold with single hot runner and single injection of claim 4, wherein: The rear mold plate is installed and fixed on a rear mold fixed plate, the rear mold fixed plate is provided with a rear air ejector mechanism, the rear air ejector mechanism is communicated to the cavity of the rear mold plate to form a demolding structure for the rear row of products; an exhaust screw is arranged in the rear mold plate, the exhaust screw penetrates through the rear mold plate and is communicated to the cavity of the rear mold plate, and a groove is arranged on the back surface of the rear mold plate to communicate the exhaust screw with the outside; a front air ejector mechanism is arranged in the middle mold plate, and the front air ejector mechanism is communicated to the front cavity of the middle mold plate to form a demolding structure for the front row of products.

7. The stack mold with single hot runner unidirectional injection of claim 6, wherein: Cooling mechanisms are arranged in the front mold plate, the middle mold plate, the rear mold plate and the cylinder mounting plate, wherein the cooling mechanisms of the front mold plate and the middle mold plate comprise at least two rows of cooling water paths.

8. The stack mold with single hot runner and single injection of claim 6, wherein: The front mold plate, the middle mold plate, the rear mold plate, the rear mold fixing plate, the flow channel mounting plate and the cylinder mounting plate are connected together through a plurality of guide column sleeve groups, wherein the rear mold fixing plate is fixedly connected with guide columns of the guide column sleeve group, and the front mold plate, the middle mold plate, the rear mold plate, the flow channel mounting plate and the cylinder mounting plate are respectively connected with corresponding sleeves of the guide column sleeve group; a plurality of guide rods are fixed in the front mold plate, and the middle mold plate is movably assembled with the guide rods through guide sleeves.

9. The stack mold with single hot runner one way injection of claim 1, wherein: A hot nozzle hole for a hot nozzle with a greater length to pass through is arranged in the front cavity of the middle mold plate and corresponds to a front row of product hollow parts; the hot nozzle with the greater length is connected with a blowing pipe, and the blowing pipe is led out from the middle mold plate.

10. The stack mold with single hot runner and single injection of claim 4, wherein: A detachable mold buckle is fixed on the outer side wall of the front mold plate and the rear mold plate, and the front mold plate, the middle mold plate and the rear mold plate are locked by mounting the mold buckle; a positioning ring is arranged on the cylinder mounting plate.

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