TPU product injection mold

Abstract

The utility model relates to the technical field of molds, in particular to a TPU (thermoplastic polyurethane) product injection mold. The TPU product injection mold comprises an upper mold base and a lower mold base, a first forming groove is formed in the bottom of the upper die base, and a second forming groove is formed in the position, corresponding to the first forming groove, of the top of the lower die base. And anti-sticking layers are plated on the groove walls of the first forming groove and the second forming groove. The anti-sticking structure solves the problems that an existing anti-sticking structure of the TPU product injection mold is high in cost, large in occupied space and poor in applicability.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an injection mold for a TPU product. Background Art

[0002] TPU is thermoplastic polyurethane, an environmentally friendly high molecular polymer that is non-toxic, wear-resistant, oil-resistant, transparent, and elastic. It also meets environmental protection requirements. It overcomes many defects of PVC and PU, and not only has most of the characteristics of rubber and ordinary plastics, but also has excellent comprehensive physical and chemical properties. Therefore, it is also called the material of the future. TPU hot melt adhesive film is made of TPU hot melt adhesive pellets through a special process.

[0003] It should be understood that products made of TPU materials tend to stick to the upper mold base when demolding, making demolding difficult and the products easily damaged after demolding. To solve this problem, the utility model patent with publication number CN208305649U discloses an anti-sticking injection mold, on which a clamping mechanism is provided. When the mold is opened, the clamping mechanism is used to clamp the product to prevent the TPU product from sticking to the upper mold base; however, the addition of the clamping mechanism is not only costly, but also occupies a large space and has poor applicability.

[0004] Therefore, it is necessary to provide a technical solution to solve the above problems. Utility Model Content

[0005] The utility model provides a TPU product injection mold, aiming to solve the problems that the anti-sticking structure of the existing TPU product injection mold has high cost, occupies a large space and has poor applicability.

[0006] To achieve the above object, the utility model provides a TPU product injection mold, including an upper mold base and a lower mold base, wherein:

[0007] A first molding groove is provided at the bottom of the upper mold base, and a second molding groove is provided at the top of the lower mold base at a position corresponding to the first molding groove; the groove walls of the first molding groove and the second molding groove are both plated with an anti-sticking layer.

[0008] More specifically, the anti-sticking layer is made of Teflon material.

[0009] More specifically, a pouring port and a plurality of water inlet channels are provided on the upper mold base, the plurality of water inlet channels are all connected to the pouring port, and each of the water inlet channels is connected to the corresponding first molding groove; an anti-sticking layer is plated inside the water inlet channel.

[0010] More specifically, a first positioning seat is detachably installed on the top of the lower mold base, and the first positioning seat is located on the outside of the second molding groove. The first positioning seat is provided with a positioning hole at a position corresponding to the second molding groove, and a mold strip is inserted in the positioning hole, and one end of the mold strip is arranged in the second molding groove.

[0011] More specifically, a receiving groove is provided at the end of the mold strip, and a first positioning strip is provided in the receiving groove.

[0012] More specifically, a positioning slot is provided on the outside of the mold strip, and the first positioning seat is provided with a second positioning strip extending into the positioning hole, and the second positioning strip is placed in the positioning slot.

[0013] More specifically, a spring sheet is installed on the second positioning strip, and the spring sheet is placed in the positioning slot and in contact with the mold strip.

[0014] More specifically, a second positioning seat is provided on the top of the lower mold seat, the second positioning seat is located on a side of the second molding groove away from the first positioning seat, and the second positioning seat is provided with a clamping groove at a position corresponding to the second molding groove.

[0015] More specifically, cooling water channels are provided in both the upper die base and the lower die base.

[0016] More specifically, a plurality of positioning guide pillars are disposed at the bottom of the upper die base, and positioning guide holes are disposed at positions of the lower die base corresponding to the positioning guide pillars.

[0017] The technical effects of a TPU product injection mold involved in the utility model are:

[0018] The first molding groove of the present invention is plated with an anti-sticking layer, which can prevent the TPU product from sticking to the upper mold base, and the second molding groove is also plated with an anti-sticking layer, so that the TPU product will not stick to the lower mold base, thereby reducing the difficulty of demoulding and the risk of product damage. The anti-sticking design of the present invention is not only low-cost, but also does not occupy additional mold space, and is highly applicable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a TPU product injection mold involved in the utility model;

[0020] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0021] Figure 3 This is a structural schematic diagram of an upper mold base in a TPU product injection mold involved in the utility model;

[0022] Figure 4 It is a cross-sectional schematic diagram of a lower mold base in a TPU product injection mold involved in the utility model;

[0023] Figure 5 for Figure 4 The enlarged schematic diagram of point B in the middle;

[0024] Figure 6 The utility model is a schematic diagram of the structure of a mold strip in a TPU product injection mold.

[0025] Markings in the figure:

[0026] 1. Upper die base; 2. Lower die base;

[0027] 11. First molding groove; 12. Pouring gate; 13. Water inlet flow channel; 14. Cooling water channel; 15. Positioning guide column;

[0028] 21. second molding groove; 22. first positioning seat; 221. second positioning strip; 222. spring piece; 23. mold strip; 231. accommodating groove; 232. first positioning strip; 233. positioning slot; 24. second positioning seat; 241. card slot; 25. positioning guide hole. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0030] It should be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be a central element at the same time; when an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the description of the embodiments of the present invention, it should be understood that the directions or positional relationships indicated by “up”, “down”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside”, etc., are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0033] In order to more clearly illustrate the technical solution of the utility model, a preferred embodiment is provided below. Figure 1 to Figure 6 , a TPU product injection mold, comprising an upper mold base 1 and a lower mold base 2, wherein:

[0034] The bottom of the upper die base 1 is provided with a first molding groove 11 , and the top of the lower die base 2 is provided with a second molding groove 21 at a position corresponding to the first molding groove 11 ; the groove walls of the first molding groove 11 and the second molding groove 21 are both plated with an anti-sticking layer.

[0035] Compared with the prior art, the TPU product injection mold involved in the utility model is different in that the first molding groove 11 is plated with an anti-sticking layer, which can prevent the TPU product from sticking to the upper mold base 1, and the second molding groove 21 is also plated with an anti-sticking layer, so that the TPU product will not stick to the lower mold base 2, thereby reducing the demoulding difficulty and the risk of product damage. The anti-sticking design of the application is not only low-cost, but also does not occupy additional mold space, and is highly applicable.

[0036] Preferably, the anti-sticking layer is made of Teflon material. Teflon not only has high lubricity and non-stick coating, which makes it difficult for TPU material to adhere, but also has the characteristics of high temperature resistance and corrosion resistance, and has a long service life when used in molds.

[0037] In this embodiment, a pouring port 12 and a plurality of nozzle channels 13 are provided on the upper mold base 1. The plurality of nozzle channels 13 are all connected to the pouring port 12, and each nozzle channel 13 is connected to the corresponding first molding groove 11; an anti-sticking layer is plated in the nozzle channel 13. With the above design, the nozzle part can also be easily demoulded to avoid clogging of the nozzle channel 13.

[0038] In this embodiment, a first positioning seat 22 is detachably mounted on the top of the lower mold base 2. The first positioning seat 22 is located outside the second molding groove 21. The first positioning seat 22 is provided with a positioning hole at a position corresponding to the second molding groove 21. A mold bar 23 is inserted into the positioning hole. One end of the mold bar 23 is arranged in the second molding groove 21. In practical applications, the mold bar 23 can be used to fix a certain component, and then secondary injection molding can be performed on the component; for example, in the injection molding of the outer shell of the connector, the mold bar 23 is used to fix the connector body, and then the outer shell is injection molded outside the connector body.

[0039] In this embodiment, a receiving groove 231 is provided at the end of the mold strip 23, and a first positioning strip 232 is provided in the receiving groove 231. It should be understood that a foolproof notch is provided on the connector body, and after the connector body is inserted into the receiving groove 231, the first positioning strip 232 cooperates with the foolproof notch to achieve the positioning of the connector body, thereby improving the yield rate of the injection molded product.

[0040] In this embodiment, a positioning slot 233 is provided on the outside of the mold strip 23, and the first positioning seat 22 is provided with a second positioning strip 221 extending into the positioning hole, and the second positioning strip 221 is placed in the positioning slot 233. The above design can prevent the mold strip 23 from rotating relative to the first positioning seat 22, thereby improving the yield rate of the injection molded product.

[0041] In this embodiment, a spring piece 222 is installed on the second positioning bar 221, and the spring piece 222 is placed in the positioning slot 233 and in contact with the mold bar 23. With the above design, the spring piece 222 applies pressure to the mold bar 23, thereby increasing the friction between the mold bar 23 and the first positioning seat 22, and preventing the mold bar 23 from sliding relative to the first positioning seat 22 during the injection molding process, thereby improving the yield rate of the injection molded product.

[0042] In this embodiment, a second positioning seat 24 is provided on the top of the lower mold base 2. The second positioning seat 24 is located on the side of the second molding groove 21 away from the first positioning seat 22. The second positioning seat 24 is provided with a card slot 241 at a position corresponding to the second molding groove 21. In practical applications, the wire of the connector body can be placed in the card slot 241 to achieve positioning. Preferably, the width of the card slot 241 is smaller than the diameter of the wire, so that the wire can be fixed by friction to prevent the wire from moving during the injection molding process, thereby improving the yield rate of the injection molded product.

[0043] In this embodiment, cooling water channels 14 are provided in both the upper mold base 1 and the lower mold base 2. During the product injection molding process, condensed water can be introduced into the cooling water channels 14 to improve the molding efficiency of the product.

[0044] In this embodiment, a plurality of positioning guide posts 15 are provided at the bottom of the upper mold base 1, and a positioning guide hole 25 is provided at the position corresponding to the positioning guide post 15 of the lower mold base 2. In practical applications, the upper mold base 1 and the lower mold base 2 are precisely aligned through the cooperation of the positioning guide posts 15 and the positioning guide holes 25, thereby improving the yield rate of the injection molded product.

[0045] The above description is only a preferred embodiment of the present invention, and its structure is not limited to the shapes listed above. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A TPU product injection mold, characterized in that: It comprises an upper die base and a lower die base, wherein: a first molding groove is provided at the bottom of the upper die base, and a second molding groove is provided at the top of the lower die base at a position corresponding to the first molding groove; the groove walls of the first molding groove and the second molding groove are both coated with an anti-sticking layer; a pouring gate and a plurality of water inlet flow channels are provided on the upper die base, and the plurality of water inlet flow channels are all connected with the pouring gate, and each of the water inlet flow channels is connected with the corresponding first molding groove; an anti-sticking layer is coated inside the water inlet flow channel.

2. According to claim 1, a TPU product injection mold, characterized in that: The anti-sticking layer is made of Teflon material.

3. According to claim 1, a TPU product injection mold, characterized in that: A first positioning seat is detachably installed on the top of the lower mold base, and the first positioning seat is located on the outside of the second molding groove. The first positioning seat is provided with a positioning hole at a position corresponding to the second molding groove, and a mold strip is inserted in the positioning hole, and one end of the mold strip is arranged in the second molding groove.

4. A TPU product injection mold according to claim 3, characterized in that: An accommodating groove is arranged at the end of the mold bar, and a first positioning strip is arranged in the accommodating groove.

5. A TPU product injection mold according to claim 4, characterized in that: A positioning slot is provided on the outside of the mold bar, and the first positioning seat is provided with a second positioning strip extending into the positioning hole, and the second positioning strip is placed in the positioning slot.

6. A TPU product injection mold according to claim 5, characterized in that: The second positioning strip is provided with an elastic sheet, which is placed in the positioning slot and in contact with the mold strip.

7. The TPU product injection mold according to claim 3, characterized in that: A second positioning seat is arranged on the top of the lower die seat, the second positioning seat is located at a side of the second molding groove away from the first positioning seat, and the second positioning seat is provided with a clamping groove at a position corresponding to the second molding groove.

8. The TPU product injection mold according to claim 1, characterized in that: Cooling water channels are provided in the upper die seat and the lower die seat.

9. The TPU product injection mold according to claim 1, characterized in that: A plurality of positioning guide pillars are arranged at the bottom of the upper die seat, and a positioning guide hole is arranged at the position of the lower die seat corresponding to the positioning guide pillars.

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