A PVC tee pipe injection molding die

Abstract

This utility model discloses a PVC tee pipe injection molding die, specifically relating to the field of injection molding die technology. It includes a base plate, a first template fixed to the side wall of the base plate, multiple fixing plates fixed to the side wall of the base plate, an electric push rod mounted on the side of the fixing plates, a top plate fixed to the end of the electric push rod, a first mold fixed to the side wall of the top plate, a cavity in the middle of the first mold, a water pipe fixed to the side wall of the fixing plates, and the water pipe communicating with the cavity in the middle of the first mold; a second mold mounted on the side wall of the first template; and a second template mounted on the side wall of the first template. The water pipe allows for cooling of the middle of the first mold, and combined with multiple cooling mechanisms such as heat dissipation fins and a fan, the heat dissipation fins first conduct heat from the surface of the first template, and then the fan carries away the heat from the surface of the heat dissipation fins, achieving uniform heat dissipation of the first template and preventing the PVC pipe from sticking to the mold surface due to excessive mold temperature.

Description

Technical Field

[0001] This utility model relates to the field of injection molding mold technology, and more specifically, to a PVC tee pipe injection molding mold. Background Technology

[0002] A PVC tee is a pipe fitting made of polyvinyl chloride plastic, with a "T" or "Y" shaped structure and three openings. It is used in piping systems to branch, merge, or change the flow direction. In water supply and drainage systems, it is used to branch or merge liquids, such as in building drainage and agricultural irrigation. In chemical pipelines, it is used to transport corrosive media because PVC is resistant to acid and alkali corrosion. In electrical engineering, it is used as a branch connection for cable protection conduits. PVC tees have advantages such as light weight, easy installation, corrosion resistance, and low cost, and are widely used in construction, municipal engineering, chemical industry, and other fields, making them an important component of modern piping systems.

[0003] Existing publication number CN214491387U discloses an injection mold for PVC tee pipes, including a box body. A partition is fixedly installed inside the box body. A first mold is fixedly installed on the top of the partition. A second mold is slidably installed on the top of the partition and in front of the first mold. Each of the first and second molds has a tee groove, an injection groove, a partition groove, and an air guide groove on opposite sides. In this injection mold for PVC tee pipes, raw material is injected into the first and second molds through the injection groove. As the raw material enters the tee groove, it compresses the air in the tee groove upwards. The compressed air is discharged to the outside through the partition groove and the air guide hole. When the tee groove is full of raw material, an electric telescopic rod moves the partition and air guide plate to the right, forming a sealed space to prevent raw material overflow. This allows for rapid air discharge from the mold, avoiding material shortages in the product. The inventors discovered the following problems with the existing technology during the development of this utility model:

[0004] Existing PVC tee injection molding molds often result in the molded PVC pipe sticking to the mold surface after molding because the mold surface is not cooled in time. This leads to excessive shrinkage or deformation of the PVC pipe inside, affecting the product qualification rate.

[0005] Therefore, a PVC tee injection molding die is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a PVC tee pipe injection molding die to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a PVC tee pipe injection molding die, comprising a base plate, a first template fixedly connected to the side wall of the base plate; multiple fixing plates fixedly connected to the side wall of the base plate; an electric push rod installed on the side of the fixing plate; a top plate fixedly connected to the end of the electric push rod; a first mold fixedly connected to the side wall of the top plate; a cavity opened in the middle of the first mold; the first mold sliding in a groove opened on the surface of the first template; a water supply pipe fixedly connected to the side wall of the fixing plate; the water supply pipe communicating with the cavity in the middle of the first mold; a second mold installed on the side wall of the first template; and a second template installed on the side wall of the first template.

[0008] Preferably, one of the first molds has a concave groove on its side wall; the other first mold has a protrusion fixed to its side wall.

[0009] Preferably, an elastic cloth is fixedly connected to the side wall of the fixing plate; the end of the elastic cloth is fixedly connected to the fixing plate; and the elastic cloth is wrapped around the middle of the electric actuator.

[0010] Preferably, the first template sidewall is fixed with multiple connecting blocks; the second template surface is provided with multiple square grooves.

[0011] Preferably, the connecting block has multiple pins in the middle; the square groove has multiple slots fixed in the middle.

[0012] Preferably, a first magnetic block is fixedly connected to the end of the slot; and a second magnetic block is fixedly connected to the middle of the ejector pin.

[0013] Preferably, the bottom plate has a deep groove on its side wall; multiple heat dissipation fins are installed in the middle of the deep groove; the heat dissipation fins are fixedly connected to the first template.

[0014] Preferably, a plurality of support plates are fixedly connected to the side wall of the base plate; a fan is installed on the side wall of the support plate.

[0015] The technical effects and advantages of this utility model are as follows:

[0016] 1. Compared with the prior art, this PVC tee pipe injection molding die can achieve cooling of the middle part of the first mold by providing a water supply pipe. At the same time, with the help of heat dissipation fins, fans and other multiple cooling settings, the surface temperature of the first mold plate is first discharged by the heat dissipation fins, and then the heat is carried away by the fan, so as to achieve uniform heat dissipation of the first mold plate and avoid the problem of PVC pipe sticking to the mold surface due to excessive mold temperature.

[0017] 2. Compared with the existing technology, this PVC tee pipe injection molding die is equipped with a connecting block, a square groove, an ejector pin, and a first magnetic block. When the first and second templates are combined, the connecting block slides into the middle of the square groove, while the slot is embedded in the middle of the ejector pin. The first and second magnetic blocks attract each other to form an engagement, which prevents the molten material from overflowing during injection molding, reduces the occurrence of flash and burrs on the product, and further improves the quality and pass rate of the product. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the first template of this utility model.

[0020] Figure 3 This is a schematic diagram of the structure of the second template of this utility model.

[0021] Figure 4 This is a schematic diagram of the heat dissipation fins of this utility model.

[0022] The attached figures are labeled as follows: 1. Base plate; 11. First template; 12. Fixing plate; 13. Electric push rod; 14. Top plate; 15. First mold; 16. Water pipe; 17. Second mold; 18. Second template; 2. Concave groove; 21. Protrusion; 3. Elastic cloth; 4. Connecting block; 41. Square groove; 5. Ejector pin; 51. Slot; 6. First magnet; 61. Second magnet; 7. Deep groove; 71. Heat dissipation fins; 8. Support plate; 81. Fan. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1

[0025] As attached Figures 1 to 4The PVC T-shaped pipe injection molding die shown includes a base plate 1, a first template 11 fixedly connected to the side wall of the base plate 1; multiple fixing plates 12 fixedly connected to the side wall of the base plate 1; electric push rods 13 installed on the side of the fixing plates 12; a top plate 14 fixedly connected to the end of the electric push rods 13; a first mold 15 fixedly connected to the side wall of the top plate 14; a cavity opened in the middle of the first mold 15; the first mold 15 slides in a groove opened on the surface of the first template 11; a water supply pipe 16 fixedly connected to the side wall of the fixing plates 12; the water supply pipe 16 communicates with the cavity in the middle of the first mold 15; a second mold 17 and a second template 18 are installed on the side wall of the first template 11.

[0026] When the PVC pipe is injection molded, the end of the water supply pipe 16 is first connected to the water pump. Then, the water pump transmits the liquid through the water supply pipe 16 to the middle of the first mold 15. Then, the electric push rod 13 is activated to extend and retract, pushing the two first molds 15 to merge. Then, the second mold 17 merges with the first mold 15. At this time, the second template 18 is moved towards the base plate 1 through the sliding device. When the second template 18 is attached to the surface of the first template 11, it stops moving, forming a sealed space. Then, the melt is injected into the closed mold cavity through the injection system. The first mold 15 and the second mold 17 form three branches, and the balanced flow channel ensures that each part is evenly filled. At this time, the cooling liquid transmitted by the water supply pipe 16 can quickly cool the first mold 15. The PVC pipe cools down rapidly after contacting the surface of the first mold 15, avoiding the first mold 15 and the PVC pipe from adhering and sticking together.

[0027] Example 2

[0028] Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:

[0029] In a preferred embodiment, one of the first molds 15 has a concave groove 2 on its side wall; when the two first molds 15 are joined together, the other first mold 15 has a protrusion 21 fixedly connected to its side wall; the protrusion 21 is embedded into the middle of the concave groove 2 to form an engagement.

[0030] In a preferred embodiment, an elastic cloth 3 is fixedly attached to the side wall of the fixing plate 12; when the electric push rod 13 is extended or retracted, the elastic cloth 3 is stretched and moves together; the end of the elastic cloth 3 is fixedly attached to the fixing plate 12; the elastic cloth 3 is wrapped around the middle of the electric push rod 13; the elastic cloth 3 can prevent dust, water stains and other debris from entering the middle of the electric push rod 13.

[0031] In a preferred embodiment, a plurality of connecting blocks 4 are fixedly connected to the side wall of the first template 11; when the first template 11 and the second template 18 are combined, the connecting blocks 4 slide into the middle of the square groove 41; a plurality of square grooves 41 are opened on the surface of the second template 18; and the first template 11 and the second template 18 are engaged with the square grooves 41 to improve the sealing performance of the first template 11 and the second template 18.

[0032] In a preferred embodiment, the connecting block 4 has a plurality of ejector pins 5 in the middle; when the connecting block 4 and the square groove 41 are combined, the slot 51 enters the middle of the ejector pin 5; the square groove 41 has a plurality of slots 51 fixedly connected in the middle; the conical surface of the slot 51 is tightly fitted to the inner wall of the ejector pin 5.

[0033] In a preferred embodiment, a first magnetic block 6 is fixedly connected to the end of the slot 51; a second magnetic block 61 is fixedly connected to the middle of the ejector pin 5; the first magnetic block 6 and the second magnetic block 61 attract each other to achieve precise positioning and auxiliary sealing.

[0034] In a preferred embodiment, a deep groove 7 is provided on the side wall of the base plate 1; a plurality of heat dissipation fins 71 are installed in the middle of the deep groove 7; the plurality of heat dissipation fins 71 can evenly dissipate heat from the surface of the first template 11; the heat dissipation fins 71 are fixedly connected to the first template 11; the heat dissipation fins 71 form convective heat exchange with the flowing air, and the heat is carried away by the flow of air.

[0035] In a preferred embodiment, a plurality of support plates 8 are fixedly connected to the side wall of the base plate 1; the fan 81 can blow air onto the surface of the heat dissipation fins 71 when the fan is turned on; the fan 81 is installed on the side wall of the support plate 8; it can quickly dissipate heat from the surface of the heat dissipation fins 71.

[0036] In this embodiment, the electric actuator 13, fan 81, etc. are all commercially available devices known to those skilled in the art. They can be customized or selected according to actual needs. Here, we are only using them without making any structural or functional improvements, and we will not go into detail here.

[0037] The working process of this utility model is as follows: When the PVC pipe is injection molded, the end of the water supply pipe 16 is first connected to the water pump. Then the water pump transmits the liquid through the water supply pipe 16 to the middle of the first mold 15. Then the electric push rod 13 is activated to extend and retract. When the electric push rod 13 extends and retracts, the elastic cloth 3 is stretched and moves together. Then the two first molds 15 are pushed to merge. When the two first molds 15 merge, the protrusion 21 is embedded into the middle of the concave groove 2. Then the second mold 17 is merged with the first mold 15. At this time, the second template 18 is moved towards the base plate 1 through the sliding device. When the second template 18 is attached to the surface of the first template 11, it stops moving, forming a sealed space. At this time, when the first template 11 and the second template 18 merge, the connecting block 4 slides into the square groove 41. Simultaneously, the first magnetic block 6 and the second magnetic block 61 in the middle of the ejector pin 5 enter the slot 51 and attract each other to form an engagement. Then, the melt is injected into the closed mold cavity through the injection system. The first mold 15 and the second mold 17 form three branches, and the balanced flow channel ensures that each part is evenly filled. At this time, the cooling liquid transmitted by the water pipe 16 can quickly cool the first mold 15. After the PVC pipe comes into contact with the surface of the first mold 15, it cools down quickly. At this time, multiple heat dissipation fins 71 can evenly dissipate the heat from the surface of the first mold plate 11. The fan 81 can blow air on the surface of the heat dissipation fins 71 to quickly dissipate heat from the surface of the heat dissipation fins 71, avoiding the situation where the first mold 15 and the PVC pipe are attracted and stuck together. The above is the working principle of this PVC tee pipe injection molding mold.

Claims

1. A PVC tee pipe injection molding die, comprising a base plate (1), characterized in that: The base plate (1) has a first template (11) fixed to its side wall; the base plate (1) has a plurality of fixing plates (12) fixed to its side wall; an electric push rod (13) is installed on the side of the fixing plate (12); a top plate (14) is fixed to the end of the electric push rod (13); a first mold (15) is fixed to the side wall of the top plate (14); a cavity is opened in the middle of the first mold (15); the first mold (15) slides in the groove opened on the surface of the first template (11); a water supply pipe (16) is fixed to the side wall of the fixing plate (12); the water supply pipe (16) is connected to the cavity in the middle of the first mold (15); a second mold (17) is installed on the side wall of the first template (11); a second template (18) is installed on the side wall of the first template (11).

2. The PVC tee injection molding die according to claim 1, characterized in that: One of the first molds (15) has a concave groove (2) on its side wall; the other first mold (15) has a protrusion (21) fixed to its side wall.

3. The PVC tee injection molding die according to claim 1, characterized in that: The side wall of the fixed plate (12) is fixed with an elastic cloth (3); the end of the elastic cloth (3) is fixed with the fixed plate (12); the elastic cloth (3) is wrapped around the middle of the electric push rod (13).

4. The PVC tee injection molding die according to claim 1, characterized in that: The first template (11) has multiple connecting blocks (4) fixed to its side wall; the second template (18) has multiple square grooves (41) on its surface.

5. The PVC tee injection molding die according to claim 4, characterized in that: The connecting block (4) has multiple pins (5) in the middle; the square groove (41) has multiple slots (51) fixed in the middle.

6. The PVC tee injection molding die according to claim 5, characterized in that: The first magnetic block (6) is fixed to the end of the slot (51); the second magnetic block (61) is fixed to the middle of the ejector pin (5).

7. The PVC tee injection molding die according to claim 1, characterized in that: The bottom plate (1) has a deep groove (7) on its side wall; a plurality of heat dissipation fins (71) are installed in the middle of the deep groove (7); the heat dissipation fins (71) are fixedly connected to the first template (11).

8. The PVC tee injection molding die according to claim 7, characterized in that: The base plate (1) has multiple support plates (8) fixed to its side wall; a fan (81) is installed on the side wall of the support plate (8).

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