Plastic tray injection mold

Abstract

The utility model belongs to injection mold field, concretely relates to a kind of plastic tray injection mold, including fixed mould duplicate board and movable mould duplicate board, fixed mould duplicate board is set down fixed mould plate, movable mould duplicate board is set two groups of mould foot, two groups of mould foot are set movable mould plate, movable mould plate is set movable mould insert and sliding block, movable mould plate, movable mould insert and sliding block are matched with fixed mould plate and form mould cavity, mould cavity is injected plastic tray, and tray ejection structure is set between the two groups of mould foot, and tray ejection structure is set rolling support structure between one group of mould foot or two groups of mould foot.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and specifically relates to an injection mold for a plastic pallet. Background Technology

[0002] Plastic pallets are used in warehousing, logistics, and transportation, and are typically manufactured using injection molds. Injection molds are generally mounted sideways on the injection molding machine, with the top side facing upwards and the bottom side downwards, suspended from the machine's mounting plate. Therefore, the mold components on the bottom side bear a greater weight. The ejection mechanism of an injection mold generally consists of an ejector base plate, an ejector plate, and ejector pins. The ejector base plate and ejector plate are positioned between the two sets of mold feet but do not contact them; they rely on guide pillars for support. These guide pillars pass through the ejector base plate and ejector plate, with their ends fixed to the moving mold platen and moving mold platen, respectively. During ejection, they also guide the ejector base plate and ejector platen. Injection molds for plastic pallets are relatively large and heavy, resulting in a correspondingly heavy ejector base plate and ejector face plate. Therefore, traditional plastic pallet injection molds typically use a large number of guide pillars (usually 8-10) to distribute the weight and prevent the ejector base plate and face plate from bending or breaking them. However, having more guide pillars increases material costs; it may interfere with the installation of other ejection components (such as angled ejector pins); and the guide pillars are more prone to wear during the guiding process due to their load-bearing capacity, requiring frequent downtime for replacement and reducing production efficiency. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a new type of plastic pallet injection mold that uses roller contact for load bearing and ejection guidance, thereby reducing the number of guide pillars, saving costs, and improving production and assembly efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A plastic pallet injection mold includes a fixed mold plate and a movable mold plate. A fixed template is provided under the fixed mold plate, and two sets of mold feet are provided on the movable mold plate. A movable template is provided on the two sets of mold feet, and a movable mold insert and a slider are provided on the movable template. The movable template, the movable mold insert and the slider cooperate with the fixed template to form a mold cavity. A plastic pallet is injected into the mold cavity. A pallet ejection structure is provided between the two sets of mold feet, and a rolling support structure is provided between the pallet ejection structure and one or both sets of mold feet.

[0005] Furthermore, the tray ejection mechanism includes an ejector base plate and an ejector panel between two sets of mold feet, with ejector pins connected to the ejector panel. The ejector pins pass through the moving mold plate and the moving mold insert and abut against the plastic tray. The rolling support structure is set on one or both sides of the ejector base plate and the ejector panel and contacts one or both sets of mold feet.

[0006] Furthermore, the rolling support structure includes support rollers provided on one or both sides of the ejector base plate and ejector panel, and guide grooves provided on the corresponding walls of one or both sets of mold feet, with the support rollers cooperating with the guide grooves.

[0007] Furthermore, guide strips are provided on the corresponding wall surfaces of one or both sets of mold feet, and the guide grooves are formed on the guide strips.

[0008] Furthermore, two or four guide posts are inserted in the ejector base plate and ejector panel, and a return spring is sleeved on each guide post. The upper end of the return spring abuts against the bottom surface of the moving template, and the lower end of the return spring abuts against the ejector panel.

[0009] This utility model discloses a plastic pallet injection mold, which has the following advantages compared with traditional pallet molds: The support rollers contact the guide grooves on the mold base, providing support (load bearing) for the ejector pin base plate and ejector pin panel, reducing the number of guide pins to 2 or 4, saving costs. Furthermore, a return spring is installed on each guide pin, so that the ejector pin base plate and ejector pin panel automatically return to their original positions after ejection. With fewer guide pillars, there is more space to install other ejection components (such as angled ejector seats and angled ejector rods), which facilitates the assembly of plastic tray ejection components. The support rollers work in conjunction with the guide grooves to guide the ejector pins during the ejection process from the ejector pin base plate and ejector pin panel. The rollers provide rolling guidance, which reduces friction, improves guiding accuracy, reduces downtime for maintenance, and increases production efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the tray ejection structure of this utility model and the rolling support structure between one of the mold feet; Figure 2 yes Figure 1 A magnified view of part A; Figure 3 This is a schematic diagram of the tray ejection structure and the rolling support structure between the two sets of mold feet of this utility model. Detailed Implementation

[0011] The present invention will be described in detail below with reference to specific implementation examples. The following implementation examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way.

[0012] like Figure 1 — Figure 3As shown, this utility model relates to a plastic pallet injection mold, including a fixed mold plate 1 and a movable mold plate 2. A fixed template 3 is provided under the fixed mold plate, and two sets of mold feet 4 are provided on the movable mold plate. A movable template 5 is provided on the two sets of mold feet, and a movable mold insert 6 and a slider 7 are provided on the movable template 5. The movable template 5, the movable mold insert 6, and the slider 7 cooperate with the fixed template 3 to form a mold cavity, in which a plastic pallet 8 is injected. A pallet ejection structure is provided between the two sets of mold feet 4, and a rolling support structure is provided between the pallet ejection structure and one or both sets of mold feet. The pallet ejection mechanism includes an ejector base plate 10 and an ejector panel 11 provided between the two sets of mold feet 4. An ejector pin 12 is connected to the ejector panel 11. The ejector pin 12 passes through the movable template 5 and the movable mold insert 6 and abuts against the plastic pallet 8. The rolling support structure is provided on one or both sides of the ejector base plate 10 and the ejector panel 11 and contacts one or both sets of mold feet. The rolling support structure includes support rollers 15 on one or both sides of the ejector base plate 10 and ejector panel 11, and guide grooves 16 on the corresponding wall surfaces of one or two sets of mold feet 4, with the support rollers 15 cooperating with the guide grooves 16.

[0013] Furthermore, guide strips 19 are provided on the corresponding wall surfaces of one or both sets of mold feet 4, and guide grooves 16 are formed on the guide strips 19.

[0014] In actual production, the injection mold is horizontally mounted on the mounting plate of the injection molding machine. The upward side is the top side, and the downward side is the bottom side. The bottom side bears the weight. Therefore, the rolling support structure can be set only between the ejector base plate 10 and ejector panel 11 on the bottom side and a set of mold feet 4 on the bottom side to provide support. However, rolling support structures can also be set on both the bottom and top sides for greater stability during the ejection process of the ejector panel 10 and ejector base plate 11. The support rollers 15 and guide strips 19 can be nitrogen-hardened to increase hardness, wear resistance, and service life.

[0015] Furthermore, two or four guide posts 17 are inserted into the ejector base plate 10 and the ejector panel 11. A reset spring 18 is sleeved on each guide post 17. The upper end of the reset spring abuts against the bottom surface of the moving template 5, and the lower end of the reset spring abuts against the ejector panel 11. With the reset spring, when the ejector base plate and the ejector panel are pushed up, the spring force of the reset spring can automatically reset.

[0016] The above specific embodiments are used to explain and illustrate the present utility model, and are not intended to limit the present utility model. Any modifications and changes made to the present utility model within the spirit and scope of the claims shall fall within the protection scope of the present utility model.

Claims

1. A plastic pallet injection mold characterized by: It includes a fixed mold plate (1) and a moving mold plate (2). A fixed template (3) is set under the fixed mold plate. Two sets of mold feet (4) are set on the moving mold plate. A moving template (5) is set on the two sets of mold feet. A moving mold insert (6) and a slider (7) are set on the moving template (5). The moving template (5), the moving mold insert (6) and the slider (7) cooperate with the fixed template (3) to form a mold cavity. A plastic tray (8) is injected into the mold cavity. A tray ejection structure is set between the two sets of mold feet (4). A rolling support structure is set between the tray ejection structure and one or both sets of mold feet.

2. A plastic pallet injection mold as claimed in claim 1, wherein The tray ejection mechanism includes an ejector base plate (10) and an ejector panel (11) disposed between two sets of mold feet (4). An ejector pin (12) is connected to the ejector panel (11). The ejector pin (12) passes through the moving template (5) and the moving mold insert (6) and abuts against the plastic tray (8). The rolling support structure is disposed on one or both sides of the ejector base plate (10) and the ejector panel (11) and contacts one or both sets of mold feet.

3. A plastic pallet injection mold as claimed in claim 2, wherein The rolling support structure includes a support roller (15) on one or both sides of the ejector base plate (10) and ejector panel (11), and a guide groove (16) on the corresponding wall of one or two sets of mold feet (4), with the support roller (15) cooperating with the guide groove (16).

4. A plastic pallet injection mold as claimed in claim 3, wherein Guide strips (19) are provided on the corresponding wall surfaces of one or two sets of mold feet (4), and guide grooves (16) are formed on the guide strips (19).

5. A plastic pallet injection mold as claimed in claim 2, wherein Two or four guide pins (17) are inserted in the ejector base plate (10) and ejector panel (11). Each guide pin (17) is fitted with a reset spring (18). The upper end of the reset spring abuts against the bottom surface of the moving template (5), and the lower end of the reset spring abuts against the ejector panel (11).

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