A non-perforated embedded part suitable for a rotational molding process
By combining pre-embedded metal parts with low thermal conductivity heat insulation heads in the rotational molding process, the problem of slow cooling speed of traditional pre-embedded parts is solved by utilizing a self-melting film, achieving the effect of eliminating the need for drilling and cleaning debris, thus simplifying the production process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG JIUDI INTELLIGENT MFG TECH CO LTD
- Filing Date
- 2025-07-12
- Publication Date
- 2026-07-14
AI Technical Summary
In the rotational molding process, the traditional copper embedded parts have good thermal conductivity, which results in a slow cooling rate. During the cooling process, the product tends to accumulate at the inlet and outlet of the embedded parts, requiring drilling to clean up the debris, which increases the production difficulty.
It adopts a combination of pre-embedded metal parts and heat insulation head. The heat insulation head is made of polyetheretherketone, polytetrafluoroethylene or polyethylene material, and the surface is covered with a self-melting film. Utilizing its low thermal conductivity, it avoids the product from accumulating during the cooling process. The self-melting film melts on the surface of the heat insulation head, achieving the goal of eliminating the need for drilling and cleaning.
This technology prevents the product from accumulating at the inlet and outlet of the embedded parts during the cooling process, reduces the need for drilling and cleaning debris, and simplifies the production process.
Smart Images
Figure CN224489780U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of rotomolded box embedded parts, and in particular to a hole-free embedded part suitable for rotomolding process. Background Technology
[0002] Some water tanks, oil tanks, or irregularly shaped tanks are made using rotational molding. Rotational molding is mainly used to make hollow products. Plastic powder is placed into a hollow mold, which is then closed and rotated on multiple axes while being heated. After repeated heating and rotation, the powder melts into a liquid and accumulates evenly on the inner wall of the mold. After cooling and solidification, the mold is opened to obtain a hollow product.
[0003] Some hollow box-shaped products require water pipe connections. The traditional method involves directly fixing a ring-shaped copper embedded part into the mold before rotational molding. The drawback of this method is that the copper embedded part has good thermal conductivity and a slow cooling rate. During the cooling process, the part of the product in contact with the copper embedded part will remain molten for a longer period of time. This causes the material to flow and accumulate at the tail end of the copper embedded part during cooling, partially blocking the inlet and outlet of the copper embedded part. At this point, it is necessary to drill through the inlet and outlet of the copper embedded part with a drilling tool. During the drilling process, debris will fall into the product, and after drilling, the debris needs to be cleaned up, which is very troublesome. Against this background, the applicant is committed to developing a hole-free embedded part suitable for rotational molding. This would prevent the product from accumulating at the inlet and outlet of the embedded part during cooling when using rotational molding, thus eliminating the need for drilling and debris cleaning, and further facilitating production operations. Summary of the Invention
[0004] The purpose of this invention is to prevent the product from accumulating at the inlet and outlet of the embedded part during the cooling process when using rotational molding, thereby eliminating the need for drilling and cleaning debris, and further facilitating production operations.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A hole-free embedded part suitable for rotational molding process includes an embedded metal part, a heat insulation head, and a self-melting film. The heat insulation head is fixedly sleeved on one end of the embedded metal part, and the self-melting film is sleeved on the surface of the heat insulation head.
[0007] Furthermore, the embedded metal parts and the heat insulation head are all ring-shaped.
[0008] Furthermore, the heat insulation head is made of polyetheretherketone, polytetrafluoroethylene, or polyethylene.
[0009] Furthermore, the self-melting film is made of PE material.
[0010] Furthermore, a fixing groove is provided at one end of the pre-embedded metal part, and the heat insulation head is fixedly installed in the fixing groove.
[0011] Furthermore, an annular groove is provided on the outer side of the end of the pre-embedded metal part away from the heat insulation head.
[0012] Furthermore, a barb is fixedly provided on the outer side of the pre-embedded metal part.
[0013] Furthermore, a step is provided on the outer surface of the heat insulation head.
[0014] Furthermore, it also includes a sealing ring, and an installation groove is provided on the outer side of the heat insulation head, and the sealing ring is fitted into the installation groove.
[0015] Furthermore, an assembly hole is provided at the end of the embedded metal part away from the heat insulation head.
[0016] The beneficial effects of this utility model are as follows: By fixing a heat insulation head on a pre-embedded metal part and covering the surface of the heat insulation head with a self-melting film, before rotational molding, the end of the pre-embedded metal part away from the heat insulation head is pressed against the mold. When the product is completed in rotational molding, the self-melting film melts on the surface of the heat insulation head. During the cooling process, although the cooling speed of the part in contact with the pre-embedded metal part is slow, the part in contact with the heat insulation head will cool faster due to the poor thermal conductivity of the heat insulation head. This avoids the continuous flow and accumulation of the product at the inlet and outlet of the heat insulation head and prevents the inlet and outlet of the pre-embedded metal part and the heat insulation head from being blocked by the product. Compared with traditional technology, this utility model achieves the purpose of eliminating the need for drilling and cleaning debris, thereby reducing the operation process and further facilitating people's production operations. Attached Figure Description
[0017] Figure 1 This is one of the structural diagrams of the present invention when it is embedded inside the product;
[0018] Figure 2 This is the second structural schematic diagram of the present invention when it is embedded inside the product;
[0019] Figure 3 This is a cross-sectional view of the present invention when it is embedded inside the product;
[0020] Figure 4 This is a structural cross-sectional view of the embedded metal part of this utility model;
[0021] Figure 5 This is a cross-sectional view of the structure of the heat insulation head of this utility model;
[0022] Figure 6 This is an exploded view of the embedded metal parts, heat insulation head, and sealing ring of this utility model;
[0023] The attached figures are labeled as follows:
[0024] Embedded metal parts 1, fixing groove 11, annular groove 12, barb 13, assembly hole 14,
[0025] Insulation head 2, step 21, mounting groove 22,
[0026] 3. Self-melting membrane; 4. Sealing ring. Detailed Implementation
[0027] The present invention will be further described below with reference to the accompanying drawings.
[0028] like Figures 1 to 6 The diagram shows a hole-free embedded part suitable for rotational molding process, including an embedded metal part 1, a heat insulation head 2, a self-melting film 3, and a sealing ring 4.
[0029] Both the embedded metal part 1 and the heat insulation head 2 are ring-shaped. The hollow part in the middle of the embedded metal part 1 is the inlet and outlet of the embedded metal part 1, and the hollow part in the middle of the heat insulation head 2 is the inlet and outlet of the heat insulation head 2. When the water tank or oil tank is manufactured by rotational molding, the embedded metal part 1 and the heat insulation head 2 are embedded in the water tank or oil tank. Water pipes can be connected through the inlet and outlet of the embedded metal part 1 and the heat insulation head 2 to draw out water or oil.
[0030] The heat insulation head 2 is fixedly sleeved on one end of the embedded metal part 1. The inlet and outlet of the embedded metal part 1 are connected to the inlet and outlet of the heat insulation head 2. More specifically, the structure is as follows: a fixing groove 11 is opened at one end of the embedded metal part 1, and the heat insulation head 2 is fixedly installed in the fixing groove 11. More specifically, the connection structure is as follows: the heat insulation head 2 is fixedly installed in the fixing groove 11 by thread, tight fitting or bonding. The heat insulation head 2 and the embedded part have airtight requirements.
[0031] The self-melting film 3 is applied to the surface of the heat insulation head 2. The self-melting film 3 is made of PE material. When the product is rotomolded, the self-melting film 3 will melt along with the plastic powder and adhere to the surface of the heat insulation head 2.
[0032] The heat insulation head 2 is made of polyetheretherketone, polytetrafluoroethylene or polyethylene, which makes full use of the characteristics of polyetheretherketone, polytetrafluoroethylene or polyethylene, such as high temperature resistance, high mechanical strength, strong chemical stability and poor thermal conductivity; the embedded metal part 1 is made of copper.
[0033] An annular groove 12 is provided on the outer side of the end of the embedded metal part 1 away from the heat insulation head 2, and a barb 13 is fixedly provided on the outer side of the embedded metal part 1. The design of the annular groove 12 and the barb 13 can make the embedded metal part 1 more tightly connected to the rotationally molded product and less likely to come off the product.
[0034] A step 21 is provided on the outer surface of the heat insulation head 2; the design of the step 21 can make the heat insulation head 2 more tightly connected to the rotationally molded product, and it is not easy to detach from the product or leak.
[0035] An installation groove 22 is provided on the outer side of the heat insulation head 2. The sealing ring 4 is inserted into the installation groove 22 and is squeezed between the product and the heat insulation head 2. When the product expands and contracts with temperature changes, the sealing ring 4 can effectively prevent the risk of leakage between the product and the heat insulation head 2.
[0036] An assembly hole 14 is provided at the end of the embedded metal part 1 away from the heat insulation head 2. The assembly hole 14 is used for assembly and connection with other structures.
[0037] The working principle of this utility model is as follows: During rotational molding, the end of the pre-embedded metal part 1 away from the heat insulation head 2 is placed against the mold. Plastic powder is put into the hollow mold. After the mold is closed, it is rotated on multiple axes and heated. After repeated heating and rotation, the plastic powder melts into a liquid state and is evenly accumulated on the inner wall of the mold. At this time, the self-melting film 3 also melts and adheres to the surface of the heat insulation head 2. During the cooling process, due to the poor thermal conductivity of the heat insulation head 2, the part of the product in contact with the heat insulation head 2 will cool down faster, thereby avoiding the continuous flow and accumulation of the product at the inlet and outlet of the heat insulation head 2. This also prevents the pre-embedded metal part 1 and the inlet and outlet of the heat insulation head 2 from being blocked by the product, thus achieving the purpose of eliminating the need for drilling and cleaning debris.
[0038] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of protection of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the patent application of the present utility model shall still fall within the scope of the present utility model. The above does not constitute any limitation on the technical scope of the present utility model. Any modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.
Claims
1. A hole-free embedded part suitable for rotational molding process, characterized in that: It includes a pre-embedded metal part, a heat insulation head, and a self-melting film. The heat insulation head is fixedly sleeved on one end of the pre-embedded metal part, and the self-melting film is sleeved on the surface of the heat insulation head.
2. The hole-free embedded part suitable for rotational molding process according to claim 1, characterized in that: The embedded metal parts and the heat insulation head are all ring-shaped.
3. A hole-free embedded part suitable for rotational molding process according to claim 1, characterized in that: The heat insulation head is made of polyetheretherketone, polytetrafluoroethylene, or polyethylene.
4. A hole-free embedded part suitable for rotational molding process according to claim 1, characterized in that: The self-melting film is made of PE material.
5. A hole-free embedded part suitable for rotational molding process according to claim 1, characterized in that: One end of the embedded metal part is provided with a fixing groove, and the heat insulation head is fixedly installed in the fixing groove.
6. A hole-free embedded part suitable for rotational molding process according to claim 1, characterized in that: An annular groove is provided on the outer side of the end of the pre-embedded metal part away from the heat insulation head.
7. A hole-free embedded part suitable for rotational molding process according to claim 1, characterized in that: The outer side of the embedded metal part is fixedly provided with barbs.
8. A hole-free embedded part suitable for rotational molding process according to claim 1, characterized in that: A step is provided on the outer surface of the heat insulation head.
9. A hole-free embedded part suitable for rotational molding process according to claim 1, characterized in that: It also includes a sealing ring, and an installation groove is provided on the outer side of the heat insulation head, and the sealing ring is stuck in the installation groove.
10. A hole-free embedded part suitable for rotational molding process according to any one of claims 1-9, characterized in that: An assembly hole is provided at the end of the embedded metal part away from the heat insulation head.