Injection mold for upper and lower rings of a bathtub

Abstract

The utility model relates to a kind of injection mould of bath barrel upper and lower ring, belong to injection mould technical field.It includes top plate, upper mould, middle mould, lower mould and foot plate in turn, and upper mould and middle mould are longitudinally slidably connected, and middle mould is annular structure, and the inside of middle mould is equipped with inner mould, and inner mould bottom is detachably connected with lower mould, and the bottom of upper mould is equipped with annular partition block extending downward, and partition block can be slidably inserted between middle mould and inner mould, and first forming cavity is formed between middle mould and partition block, and second forming cavity is formed between inner mould and partition block;In the scheme, partition block is inserted between middle mould and inner mould, so that first forming cavity and second forming cavity are formed in the inside of mould, and two forming cavities are not communicated with each other, and first forming cavity is arranged on the outside of second forming cavity, so that the product of upper and lower barrel ring can be cooled and formed in first forming cavity and second forming cavity respectively in the process of once injection molding, and production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, and relates to an injection mold for the upper and lower rings of a bathtub. Background Technology

[0002] As living standards improve, people are paying more and more attention to comfort. Some people take a bath before bed to relieve the day's fatigue, leading to the increasing popularity of bathtubs. One existing technology involves a folding bathtub composed of upper and lower tub rings connected by an elastic material, giving the tub a folding function for easy storage. Since the upper and lower tub rings are made of plastic, it can be manufactured using injection molding.

[0003] Injection molds are devices used to produce plastic products. Plastic raw materials are heated to a molten state and then injected into the molding cavity inside the mold. After the molding cavity is filled, the mold is rapidly cooled, and the molten plastic raw materials cool and solidify to form the desired plastic parts. Using injection molds to produce plastic products has advantages such as high precision and high efficiency.

[0004] Since the upper and lower barrel rings are two separate components, the current technology typically uses two sets of molds to manufacture them separately. However, using two sets of molds increases production costs and requires more manpower, thus reducing production efficiency. Summary of the Invention

[0005] The purpose of this utility model is to address the problems existing in the current technology by proposing an injection mold for the upper and lower rings of a bathtub. The technical problem to be solved by this utility model is: how to produce the upper and lower rings of the tub simultaneously in one mold.

[0006] The objective of this utility model can be achieved through the following technical solution: An injection mold for the upper and lower rings of a bathtub, comprising a top plate, an upper mold, a middle mold, a lower mold, and a foot plate arranged in sequence. The upper mold and the middle mold are longitudinally slidably connected. The middle mold has an annular structure. An inner mold is provided on the inner side of the middle mold. The bottom of the inner mold is detachably connected to the lower mold. An annular dividing block extending downward is provided at the bottom of the upper mold. The dividing block can be slidably inserted between the middle mold and the inner mold. The middle mold and the dividing block enclose a first molding cavity, and the inner mold and the dividing block enclose a second molding cavity.

[0007] In this design, the mold has two separate molding cavities: a first molding cavity and a second molding cavity. After the plastic raw material is heated to a molten state, it fills both cavities. Once both cavities are full, the mold is cooled to allow the molten plastic to cool and solidify rapidly. Finally, the mold is moved to open, ejecting the plastic product. A ring-shaped intermediate mold is placed outside the inner mold, with a separator inserted between them, creating a closed space between the first and second molding cavities. These cavities are not interconnected. The first molding cavity surrounds the second molding cavity, allowing the upper and lower barrel rings to cool and solidify separately in the first and second molding cavities during a single injection molding process, thus improving production efficiency.

[0008] In the injection mold for the upper and lower rings of the bathtub described above, the first molding cavity has an annular structure, and the upper ring shell is formed by cooling inside the first molding cavity. The lower ring shell is formed by cooling inside the second molding cavity. Since the first molding cavity is arranged around the outside of the second molding cavity, a larger radius upper ring shell can be formed inside the first molding cavity. The upper ring shell has an annular structure, and the lower ring shell, which is formed by cooling inside the second molding cavity, has a barrel-shaped structure and is used to form the bottom of the bathtub.

[0009] In the injection mold for the upper and lower rings of the bathtub, a slidingly connected push plate is provided on the inner side of the foot plate. The push plate has several fixed ejector pins that slide through the lower and middle molds and extend to the bottom of the first molding cavity. After the mold cools and forms, and the mold opens, the push plate is pushed towards the side closer to the lower mold, causing the ejector pins to extend from the bottom of the first molding cavity and eject the product from inside the first molding cavity.

[0010] In the aforementioned injection mold for the upper and lower rings of the bathtub, the push plate is provided with several fixed ejector rods, and the top of the lower mold is provided with several slidably connected ejector blocks. The ejector blocks are located at the bottom of the first and second molding cavities, and the bottom of the ejector blocks is fixedly connected to the top of the ejector rods. The push plate can drive the ejector rods to move, and the ejector rods can push the ejector blocks out of the lower mold. Since the ejector blocks are located at the bottom of the first and second molding cavities, the ejector blocks can simultaneously push the products formed inside the two molding cavities to demold.

[0011] In the injection mold of the upper and lower rings of the bathtub, the foot plate has several fixed guide posts inside. The guide posts are arranged longitudinally, and the push plate is slidably connected to the guide posts. The guide posts serve a guiding function, causing the push plate to slide along the direction of the guide posts and preventing the push plate from deviating during movement.

[0012] In the injection mold for the upper and lower rings of the aforementioned bathtub, the top plate is provided with a feed inlet, and the bottom of the feed inlet is provided with a connected flow channel. The bottom of the flow channel is provided with several connected nozzles, and the bottom of each nozzle is connected to either the first or second molding cavity. After the plastic raw material is heated to a molten state, it is injected through the feed inlet and flows into the connected flow channel at the bottom. After being diverted by the flow channel, it flows into each of the nozzles at the bottom, and then into the first and second molding cavities.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. In this solution, an annular middle mold is set on the outside of the inner mold, and a separator is inserted between the two to form a first molding cavity and a second molding cavity inside the mold. The two molding cavities are not connected to each other. The first molding cavity is arranged around the outside of the second molding cavity, so that the upper and lower barrel ring products can be cooled and formed in the first molding cavity and the second molding cavity respectively during one injection molding process, thereby improving production efficiency. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a frontal half-sectional view of the structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the right-side cross-sectional structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the upper and lower shell structures of this utility model.

[0019] In the diagram, 1 is the top plate; 1a is the feed inlet; 1b is the flow channel; 1c is the nozzle; 2 is the upper mold; 2a is the separator block; 3 is the middle mold; 3a is the inner mold; 4 is the lower mold; 4a is the top block; 5 is the foot plate; 5a is the push plate; 5a1 is the ejector pin; 5a2 is the ejector rod; 5b is the guide post; 6 is the first molding cavity; 6a is the upper ring shell; 7 is the second molding cavity; 7a is the lower ring shell. Detailed Implementation

[0020] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0021] Example

[0022] like Figure 1As shown, the injection mold for the upper and lower rings of the bathtub includes a top plate 1, an upper mold 2, a middle mold 3, a lower mold 4, and a foot plate 5 arranged in sequence. The top plate 1 is provided with a feed port 1a. The upper mold 2 and the middle mold 3 are longitudinally slidably connected. The foot plate 5 is provided with a reciprocating push plate 5a on its inner side.

[0023] like Figure 2 As shown, the inner side of the middle mold 3 is provided with an inner mold 3a. The bottom of the inner mold 3a is detachably connected to the lower mold 4. The bottom of the upper mold 2 is provided with a downwardly extending annular partition block 2a. The partition block 2a can be slidably inserted between the middle mold 3 and the inner mold 3a. The middle mold 3 and the partition block 2a enclose a first molding cavity 6. The inner mold 3a and the partition block 2a enclose a second molding cavity 7. The bottom of the feed port 1a is provided with a connected flow channel 1b. The bottom of the flow channel 1b is provided with a plurality of connected nozzles 1c. The bottom of a portion of the nozzles 1c is connected to the second molding cavity 7. The push plate 5a is provided with a plurality of fixed ejector pins 5a1. The ejector pins 5a1 slide through the lower mold 4 and the middle mold 3 and extend to the bottom of the first molding cavity 6.

[0024] like Figure 3 Combination Figure 4 As shown, the bottom of the other part of the nozzle 1c is connected to the first molding cavity 6. The first molding cavity 6 is provided with a cooled and formed upper ring shell 6a, and the second molding cavity 7 is provided with a cooled and formed lower ring shell 7a. The push plate 5a is provided with a plurality of fixedly connected push rods 5a2. The top of the lower mold 4 is provided with a plurality of slidably connected top blocks 4a. The top blocks 4a are located at the bottom of the first molding cavity 6 and the second molding cavity 7. The bottom of the top blocks 4a is fixedly connected to the top of the push rods 5a2. The foot plate 5 is provided with a plurality of fixedly connected guide pillars 5b. The guide pillars 5b are arranged longitudinally, and the push plate 5a is slidably connected to the guide pillars 5b.

[0025] The working principle of this solution is as follows: Figure 1-4 As shown, after the plastic raw material is heated to a molten state, it is injected from the inlet 1a and flows into the bottom-connected branch channel 1b. After being divided by the branch channel 1b, it flows into each nozzle 1c at the bottom and then into the first molding cavity 6 and the second molding cavity 7. When the two molding cavities are filled with molten liquid, an upper ring shell 6a is formed inside the first molding cavity 6 and a lower ring shell 7a is formed inside the second molding cavity 7. After cooling and solidification, the moving middle mold 3 separates from the upper mold 2, and pushes the push plate 5a to the side closer to the lower mold 4, so that the ejector pin 5a1 extends from the bottom of the first molding cavity 6 and ejects the product inside the first molding cavity 6. At the same time, the ejector rod 5a2 can push the ejector block 4a to extend from the lower mold 4. Since the ejector block 4a is located at the bottom of the first molding cavity 6 and the second molding cavity 7, the ejector block 4a pushes the product formed inside the two molding cavities to demold.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0027] Although this document frequently uses terms such as 1. top plate; 1a. feed inlet; 1b. runner; 1c. nozzle; 2. upper mold; 2a. separator block; 3. middle mold; 3a. inner mold; 4. lower mold; 4a. top block; 5. foot plate; 5a. push plate; 5a1. ejector pin; 5a2. ejector rod; 5b. guide post; 6. first molding cavity; 6a. upper ring shell; 7. second molding cavity; 7a. lower ring shell, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any kind of additional limitation would contradict the spirit of this utility model.

Claims

1. An injection mold for the upper and lower rings of a bathtub, comprising a top plate (1), an upper mold (2), a middle mold (3), a lower mold (4), and a foot plate (5) arranged sequentially, wherein the upper mold (2) and the middle mold (3) are longitudinally slidably connected, characterized in that, The middle mold (3) has an annular structure. The inner side of the middle mold (3) is provided with an inner mold (3a). The bottom of the inner mold (3a) is detachably connected to the lower mold (4). The bottom of the upper mold (2) is provided with a downwardly extending annular partition block (2a). The partition block (2a) can be slidably inserted between the middle mold (3) and the inner mold (3a). The middle mold (3) and the partition block (2a) enclose each other to form a first molding cavity (6). The inner mold (3a) and the partition block (2a) enclose each other to form a second molding cavity (7).

2. The injection mold for the upper and lower rings of a bathtub according to claim 1, characterized in that, The first molding cavity (6) has an annular structure. The first molding cavity (6) is provided with a cooled and formed upper ring shell (6a). The second molding cavity (7) is provided with a cooled and formed lower ring shell (7a).

3. The injection mold for the upper and lower rings of a bathtub according to claim 1, characterized in that, The foot plate (5) has a slidingly connected push plate (5a) on its inner side. The push plate (5a) has several fixed ejector pins (5a1) that slide through the lower mold (4) and the middle mold (3) and extend to the bottom of the first molding cavity (6).

4. The injection mold for the upper and lower rings of a bathtub according to claim 3, characterized in that, The push plate (5a) is provided with several fixed push rods (5a2), and the top of the lower mold (4) is provided with several slidingly connected top blocks (4a). The top blocks (4a) are located at the bottom of the first molding cavity (6) and the second molding cavity (7), and the bottom of the top blocks (4a) is fixedly connected to the top of the push rods (5a2).

5. The injection mold for the upper and lower rings of a bathtub according to claim 3, characterized in that, The foot plate (5) is provided with several fixed guide posts (5b) inside. The guide posts (5b) are arranged longitudinally, and the push plate (5a) is slidably connected to the guide posts (5b).

6. The injection mold for the upper and lower rings of a bathtub according to claim 1, characterized in that, The top plate (1) is provided with a feed inlet (1a), and the bottom of the feed inlet (1a) is provided with a connected diversion channel (1b). The bottom of the diversion channel (1b) is provided with a plurality of connected nozzles (1c), and the bottom of the nozzles (1c) is connected to the first molding cavity (6) or the second molding cavity (7).

Images