Injection mold and mold forming apparatus

Abstract

The application provides an injection mold and a mold forming device. The injection mold comprises a front mold assembly and a rear mold assembly. The front mold assembly comprises a first front mold piece and a second front mold piece connected with each other, the first front mold piece is formed with at least one first front cavity, and the second front mold piece is formed with at least one second front cavity. The rear mold assembly is connected with the front mold assembly, the rear mold assembly is formed with at least one rear cavity, the rear cavity is communicated with the first front cavity, the rear cavity is used for fixing a semi-finished product formed in the first front cavity, and the rear mold assembly is used for making the semi-finished product formed in the first front cavity enter the second front cavity to perform secondary injection molding when being separated from the front mold assembly. The injection mold makes the precision between the molded parts formed by twice injection better and the combination better.

Description

Technical Field

[0001] This invention relates to the technical field of mold forming equipment, and in particular to an injection mold and mold forming equipment. Background Technology

[0002] Mold forming equipment is an industrial device that uses molds to produce various shaped blanks or parts. It is widely used in industry and manufacturing. Common mold forming equipment includes hydraulic presses, die-casting machines, and plastic injection molding machines. Among these, a plastic injection molding machine is a molding device that uses injection molds to produce plastic products of various shapes.

[0003] In existing technology, injection molding of ultra-thin products is carried out by step injection molding. First, the glue is injected through the injection port and enters the cavity along the runner. The first curing and molding takes place in the cavity. Then, the molded part after the first curing is removed from the mold. The molded part after the first curing is then transferred to another new mold and injection molded again to obtain a new molded product.

[0004] However, during the removal of the first-cured molded part, due to the thinness of the ultra-thin product, the first-cured molded part is more susceptible to deformation under external forces. This results in poorer precision between the second-injection molded part and the first-injection molded part. Furthermore, the first-cured molded part requires cooling before removal, leading to a prolonged waiting time. This causes the first-cured part to harden, resulting in poor adhesion between the adhesive and the first-cured part during the second injection molding process, leading to a weaker bond between the two molded parts. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an injection mold and mold forming equipment that enables the molded parts formed by two injection molding processes to have better precision and better bonding.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] An injection mold, comprising:

[0008] A front mold assembly, comprising a first front mold part and a second front mold part connected to each other, the first front mold part and the second front mold part being arranged side by side, the first front mold part forming at least one first front cavity for the first injection molding of the product to form a semi-finished product; the second front mold part forming at least one second front cavity for the second injection molding of the product; and

[0009] A rear mold assembly is connected to the front mold assembly. The rear mold assembly forms at least one rear cavity, which communicates with the first front cavity. The rear cavity is used to fix the semi-finished product formed in the first front cavity.

[0010] The rear mold assembly is used to allow the semi-finished product formed in the first front cavity to enter the second front cavity for the second injection molding when it is rotated and separated from the front mold assembly.

[0011] In one embodiment, the first front mold includes a first mold base and a plurality of connecting posts, each of the connecting posts being connected to the first mold base and each of the connecting posts being connected to the rear mold assembly. The first mold base has a snap-fit ​​groove and includes at least one first mold cavity, at least one first snap-fit ​​portion, and at least one second snap-fit ​​portion. The first mold cavity, the first snap-fit ​​portion, and the second snap-fit ​​portion are all located in the snap-fit ​​groove and connected to the first mold base. The first mold cavity is also connected to the first snap-fit ​​portion and the second snap-fit ​​portion, respectively. The first front cavity is formed in the first mold cavity.

[0012] In one embodiment, there are two of each of the first mold cavity, the first snap-fit ​​part, the second snap-fit ​​part, and the first front cavity, and the first mold cavity, the first snap-fit ​​part, the second snap-fit ​​part, and the first front cavity are arranged in a one-to-one correspondence.

[0013] In one embodiment, the second front mold includes a second mold base and a plurality of connecting posts, each of the connecting posts being connected to the second mold base. The second mold base forms a receiving cavity. The second mold base includes at least one second mold cavity portion and a plurality of fixing portions. The plurality of fixing portions are arranged at intervals around the second mold cavity portion. Each fixing portion is connected to the second mold cavity portion. The second mold cavity portion and each fixing portion are located within the receiving cavity and connected to the second mold base. The second front cavity is formed in the second mold cavity portion.

[0014] In one embodiment, there are two of each of the second mold cavity and the second front cavity, and the second mold cavity and the second front cavity are arranged in a one-to-one correspondence.

[0015] In one embodiment, the rear mold assembly includes a rear mold base and a plurality of clearance rings. The plurality of clearance rings are disposed on one outer wall of the rear mold base. The rear mold base has a plurality of connecting holes. The connecting post passes through the connecting holes and is connected to the rear mold base. The connecting post and the connecting hole are arranged in a one-to-one correspondence.

[0016] In one embodiment, the rear mold base includes at least one rear mold cavity and a plurality of fastening portions. The rear mold cavity forms a plurality of fastening channels. Each of the fastening portions passes through the fastening channel and is connected to the rear mold cavity. The fastening portions and the fastening channels are arranged in a one-to-one correspondence. The plurality of fastening portions are arranged at intervals around the rear mold cavity. The rear mold cavity and the plurality of fastening portions are all connected to the rear mold base. The rear cavity is formed in the rear mold cavity. The rear mold cavity and the rear cavity are arranged in a one-to-one correspondence.

[0017] In one embodiment, the rear mold base is provided with an engraving assembly, which includes an engraving insert, a connecting rod, an elastic portion, and an insertion portion. The engraving insert is connected to one end of the connecting rod, the elastic portion is connected to the end of the connecting rod away from the engraving insert, and the insertion portion abuts against the end of the connecting rod near the elastic portion. The rear mold base forms a receiving groove, a connecting channel, and an insertion channel. The engraving insert is located in the receiving groove and connected to the rear mold base. The connecting rod passes through the connecting channel and is connected to the rear mold base. A portion of the elastic portion is located in the connecting channel and is connected to the rear mold base. The insertion portion passes through the insertion channel and is connected to the rear mold base.

[0018] In one embodiment, the angle between the extending direction of the connection channel and the extending direction of the plug channel is 90°.

[0019] A mold forming device includes the injection mold described in any of the above embodiments.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] 1. Since the rear mold assembly is connected to the front mold assembly, the rear mold assembly is used to allow the semi-finished product formed in the first front cavity to enter the second front cavity for a second injection molding when it rotates and separates from the front mold assembly. During this process, it is not necessary to remove the semi-finished product formed in the first front cavity from the injection mold. By rotating the rear mold assembly with tools, the semi-finished product formed in the first front cavity is less likely to be deformed by external forces when rotating, thus resulting in better precision between the products formed after the two injection molding processes.

[0022] 2. As the semi-finished product formed in the first front cavity rotates with the rear cavity, it enters the second front cavity. During this process, there is no need to wait for the semi-finished product formed in the first front cavity to cool down before operation. This allows the semi-finished product formed in the first front cavity to undergo the second injection molding more quickly. As a result, the semi-finished product formed in the first front cavity is not hardened during the second injection molding, resulting in better adhesion between the adhesive used in the second injection molding and the semi-finished product formed in the first front cavity. Consequently, the products formed after the two injection molding processes have better bonding. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of an injection mold according to one embodiment;

[0025] Figure 2 for Figure 1 The diagram shows the structure of the front mold assembly of the injection mold.

[0026] Figure 3 for Figure 1 A schematic diagram of the rear mold assembly of the injection mold shown;

[0027] Figure 4 for Figure 3 A cross-sectional view (AA) of one state of the engraving assembly of the rear mold base of the rear mold assembly shown;

[0028] Figure 5 for Figure 3 A cross-sectional view (AA) of another state of the lettering assembly of the rear mold base of the rear mold assembly shown. Detailed Implementation

[0029] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] This invention provides an injection mold, including a front mold assembly and a rear mold assembly. The front mold assembly includes a first front mold part and a second front mold part connected to each other and arranged side-by-side. The first front mold part forms at least one first front cavity for the first injection molding of the product to form a semi-finished product. The second front mold part forms at least one second front cavity for the second injection molding of the product. The rear mold assembly is connected to the front mold assembly and forms at least one rear cavity that communicates with the first front cavity. The rear cavity is used to fix the semi-finished product formed in the first front cavity. When the rear mold assembly rotates and separates from the front mold assembly, the semi-finished product formed in the first front cavity enters the second front cavity for the second injection molding.

[0033] In the aforementioned injection mold, the rear mold assembly is connected to the front mold assembly. When the rear mold assembly rotates and separates from the front mold assembly, the semi-finished product formed in the first front cavity enters the second front cavity for a second injection molding. During this process, it is not necessary to remove the semi-finished product from the injection mold. By rotating the rear mold assembly with a tool, the semi-finished product in the first front cavity is less susceptible to deformation under external forces during rotation, resulting in better precision between the products formed after the two injection molding processes. Since the semi-finished product in the first front cavity rotates with the rear mold cavity to enter the second front cavity, there is no need to wait for the semi-finished product in the first front cavity to cool down before operation. This allows the semi-finished product in the first front cavity to undergo the second injection molding more quickly, preventing it from hardening during the second injection molding. This results in better adhesion between the second injection molding adhesive and the semi-finished product in the first front cavity, ultimately leading to better bonding between the products formed after the two injection molding processes.

[0034] To better understand the technical solution and beneficial effects of the present invention, the present invention will be further described in detail below with reference to specific embodiments:

[0035] like Figures 1 to 3 As shown, an injection mold 10 of one embodiment includes a front mold assembly 100 and a rear mold assembly 200. The front mold assembly 100 includes a first front mold member 110 and a second front mold member 120 connected to each other, arranged side-by-side. The first front mold member 110 forms at least one first front cavity 1112a, which is used for the first injection molding of the product to form a semi-finished product. The second front mold member 120 forms at least one second front cavity 1212a, which is used for the second injection molding of the product. The rear mold assembly 200 is connected to the front mold assembly 100 and forms at least one rear cavity 2122, which communicates with the first front cavity 1112a and is used to fix the semi-finished product formed within the first front cavity 1112a.

[0036] The rear mold assembly 200 is used to allow the semi-finished product formed in the first front cavity 1112a to enter the second front cavity 1212a for a second injection molding when it is rotated and separated from the front mold assembly 100. That is, when the rear mold assembly 200 is separated from the front mold assembly 100, the rear mold assembly 200 is rotated, causing the semi-finished product formed in the first front cavity 1112a to rotate with the rear cavity 2122, so that the semi-finished product enters the second front cavity 1212a for a second injection molding. In other words, when the rear mold assembly 200 is separated from the front mold assembly 100, the rear mold assembly 200 is rotated, causing the semi-finished product formed after injection molding in the first front cavity 1112a to rotate with the rear cavity 2122, so that the semi-finished product formed after injection molding in the first front cavity 1112a enters the second front cavity 1212a, and the semi-finished product formed after injection molding in the first front cavity 1112a is subjected to a second injection molding, ultimately forming the product. In this embodiment, the rear mold assembly 200 can be rotated manually, driven by a rotary cylinder / rotary electric cylinder, or driven by a robotic arm or other driving mechanism.

[0037] In this embodiment, when the rear mold assembly 200 separates from the front mold assembly 100, there is a large gap between the separated rear mold assembly 200 and the front mold assembly 100, so that the semi-finished product formed in the first front cavity 1112a cannot collide with the front mold assembly 100 when rotating. The semi-finished product detaches from the first front cavity 1112a and is fixed in the rear cavity 2122. When the rear mold assembly 200 is rotated, the semi-finished product rotates with the rear mold assembly 200, so that the semi-finished product comes to the top of the second front cavity 1212a. The rear mold assembly 200 and the front mold assembly 100 are merged, so that the semi-finished product enters the second front cavity 1212a for a second injection molding, and finally the product is formed. After the product cools down, the front mold assembly 100 and the rear mold assembly 200 are separated again, the product detaches from the second front cavity 1212a, the product is fixed in the rear cavity 2122, and the product is taken out from the rear cavity 2122.

[0038] Furthermore, the first front mold 110 and the second front mold 120 are spaced apart. The first front mold 110 and the second front mold 120 are symmetrically distributed along the central axis of the front mold assembly 100. During the second injection molding, the rear cavity 2122 is also connected to the second front cavity 1212a. The first front cavity 1112a and the second front cavity 1212a are arranged in a one-to-one correspondence. The number of rear cavities 2122 is equal to the sum of the number of first front cavities 1112a and the number of second front cavities 1212a. For example, if the number of rear cavities 2122 is (m+n), where m and n are integers, then the number of first front cavities 1112a is m, and the number of second front cavities 1212a is n.

[0039] The aforementioned injection mold 10, since the rear mold assembly 200 is connected to the front mold assembly 100, is used to allow the semi-finished product formed in the first front cavity 1112a to enter the second front cavity 1212a for a second injection molding when it rotates and separates from the front mold assembly 100. That is, when the rear mold assembly 200 separates from the front mold assembly 100, rotating the rear mold assembly 200 causes the semi-finished product formed after injection molding in the first front cavity 1112a to rotate with the rear cavity 2122, so that the first front cavity 1112a is injected with... The semi-finished product formed after molding enters the second front cavity 1212a. The semi-finished product formed after injection molding in the first front cavity 1112a is subjected to a second injection molding to finally form the product. During this process, it is not necessary to remove the semi-finished product formed in the first front cavity 1112a from the injection mold 10. By rotating the rear mold assembly 200 with a tool, the semi-finished product formed in the first front cavity 1112a is less likely to be deformed by external force when rotating, thus resulting in better precision between the products formed after the two injection molding processes. As the semi-finished product formed in the first front cavity 1112a rotates with the rear cavity 2122, it enters the second front cavity 1212a. During this process, there is no need to wait for the semi-finished product formed in the first front cavity 1112a to cool down before operation. This allows the semi-finished product formed in the first front cavity 1112a to be injection molded more quickly in the second injection molding. As a result, the semi-finished product formed in the first front cavity 1112a is not hardened during the second injection molding. This results in better adhesion between the adhesive used in the second injection molding and the semi-finished product formed in the first front cavity 1112a, and consequently, better bonding between the products formed after the two injection molding processes.

[0040] like Figure 2As shown, in one embodiment, the first front mold 110 includes a first mold base 111 and a plurality of connecting posts 112. Each connecting post 112 is connected to the first mold base 111 and each connecting post 112 is also connected to the rear mold assembly 200. The first mold base 111 has a snap-fit ​​groove 1111. The first mold base 111 includes at least one first mold cavity portion 1112, at least one first snap-fit ​​portion 1113 and at least one second snap-fit ​​portion 1114. The first mold cavity portion 1112, the first snap-fit ​​portion 1113 and the second snap-fit ​​portion 1114 are all located in the snap-fit ​​groove 1111 and connected to the first mold base 111. The first mold cavity portion 1112 is also connected to the first snap-fit ​​portion 1113 and the second snap-fit ​​portion 1114 respectively. The first front cavity 1112a is formed in the first mold cavity portion 1112. In this embodiment, the first mold cavity 1112 is located in the middle region of the first mold base 111, so that the force acting on the first mold base 111 decreases continuously as it acts along the first mold base 111. This reduces the force acting on the first mold cavity 1112 under the buffer of the first mold base 111, thereby reducing the external force on the first front cavity 1112a. This reduces the deformation of the first front cavity 1112a during injection molding, resulting in better precision between the products formed after two injection molding processes.

[0041] like Figure 2 As shown, in one embodiment, there are two of each of the first mold cavity portion 1112, the first snap-fit ​​portion 1113, the second snap-fit ​​portion 1114, and the first front cavity 1112a, and the first mold cavity portion 1112, the first snap-fit ​​portion 1113, the second snap-fit ​​portion 1114 and the first front cavity 1112a are arranged in a one-to-one correspondence. In this embodiment, two first mold cavities 1112 are spaced apart, two first snap-fit ​​parts 1113 are spaced apart, and two second snap-fit ​​parts 1114 are spaced apart. The two first mold cavities 1112, the two first snap-fit ​​parts 1113, and the two second snap-fit ​​parts 1114 are all symmetrically distributed about the central axis of the first mold base 111, so that the external force on the first mold cavity 1112, the first snap-fit ​​parts 1113, and the second snap-fit ​​parts 1114 is more uniform, that is, the external force on the first front cavity 1112a is more uniform, so that the external force on the first front cavity 1112a during the first injection molding is more uniform, thereby making the precision of the product formed after the first injection molding better, and thus making the precision between the product formed after the first injection molding and the product formed after the second injection molding better.

[0042] like Figure 2As shown, in one embodiment, the second front module 120 includes a second mold base 121 and a plurality of connecting posts 112. Each connecting post 112 is connected to the second mold base 121. The second mold base 121 forms a receiving cavity 1211. The second mold base 121 includes at least one second mold cavity portion 1212 and a plurality of fixing portions 1213. The plurality of fixing portions 1213 are arranged at intervals around the second mold cavity portion 1212. Each fixing portion 1213 is connected to the second mold cavity portion 1212. The second mold cavity portion 1212 and each fixing portion 1213 are located in the receiving cavity 1211 and connected to the second mold base 121. The second front cavity 1212a is formed in the second mold cavity portion 1212. In this embodiment, multiple fixing parts 1213 are used to fix the position of the product during the second injection molding, so that the position of the product formed after the first injection molding is less likely to be shaken during the second injection molding, so that the adhesion between the adhesive and the product formed after the first injection molding is better during the second injection molding, thereby making the bonding between the products formed after the two injection moldings better.

[0043] like Figure 2 As shown, in one embodiment, there are two second mold cavities 1212 and two second front cavities 1212a. The second mold cavities 1212 and the second front cavities 1212a are arranged in a one-to-one correspondence, that is, the second front mold 120 can simultaneously perform a second injection molding on two products formed after the first injection molding. The two second front cavities 1212a are arranged at intervals, so that the products formed after the first injection molding do not affect each other during the second injection molding, thereby making the products formed after the two injection moldings have better precision.

[0044] like Figure 3 As shown, in one embodiment, the rear mold assembly 200 includes a rear mold base 210 and multiple clearance rings 220. The clearance rings 220 are all disposed on one outer wall of the rear mold base 210. The rear mold base 210 has multiple connecting holes 211. Connecting posts 112 pass through the connecting holes 211 and connect to the rear mold base 210. The connecting posts 112 and connecting holes 211 are arranged in a one-to-one correspondence. In this embodiment, the front mold assembly 100 and the rear mold assembly 200 are connected by connecting posts 112, making the connection structure between the front mold assembly 100 and the rear mold assembly 200 relatively simple. This allows the rear mold assembly 200 to be easily separated from the front mold assembly 100, thereby facilitating the transfer of the product formed after the first injection molding from the first front cavity 1112a to the second front cavity 1212a. This improves the ease of transfer of the product formed after the first injection molding.

[0045] like Figure 3As shown, in one embodiment, the rear mold base 210 includes at least one rear mold cavity 212 and a plurality of fastening portions 217. The rear mold cavity 212 forms a plurality of fastening channels 2121. Each fastening portion 217 passes through the fastening channel 2121 and is connected to the rear mold cavity 212. The fastening portions 217 and the fastening channels 2121 are arranged in a one-to-one correspondence. The plurality of fastening portions 217 are arranged at intervals around the rear mold cavity 212. The rear mold cavity 212 and the plurality of fastening portions 217 are all connected to the rear mold base 210. The rear cavity 2122 is formed in the rear mold cavity 212. The rear mold cavity 212 and the rear cavity 2122 are arranged in a one-to-one correspondence. In this embodiment, each fastening part 217 passes through the fastening channel 2121 and abuts against the cavity wall of the rear cavity 2122, so that each fastening part 217 abuts against the outer surface of the semi-finished product, and the position of the semi-finished product is fixed by each fastening part 217, thereby fixing the semi-finished product in the rear cavity 2122 after it is detached from the first front cavity 1112a. Furthermore, the fastening part 217 includes a fastening body 2171 and a fastening switch 2172. The fastening switch 2172 is connected to one end of the fastening body 2171 and is fastened to the rear mold cavity 212. The fastening body 2171 passes through the fastening channel 2121, and one end of the fastening body 2171 abuts against the outer surface of the semi-finished product. Before the injection mold 10 completes two injection molding processes, the fastening switch 2172 is always fastened to the rear mold cavity 212, so that one end of the fastening body 2171 abuts against the outer surface of the semi-finished product, thereby fixing the semi-finished product in the rear cavity 2122. When the final finished product is obtained after the injection mold 10 completes two injection molding processes, the fastening switch 2172 is separated from the rear mold cavity 212, and the fastening body 2171 is pulled out from the fastening channel 2121 to release the product's position. Then, the product is removed from the rear cavity 2122.

[0046] like Figure 3 As shown, in one embodiment, there are four rear cavities 2122, which are spaced apart on the rear mold base 210 so that there is a certain distance between the multiple rear cavities 2122. This makes it difficult for the multiple rear cavities 2122 to interfere with each other when they are being injection molded at the same time, thereby making the injection mold 10 more efficient.

[0047] like Figures 4 to 5As shown, in one embodiment, the rear mold base 210 is provided with an engraving assembly 213. The engraving assembly 213 includes an engraving insert 2131, a connecting rod 2132, an elastic part 2133, and an insertion part 2134. The engraving insert 2131 is connected to one end of the connecting rod 2132, the elastic part 2133 is connected to the end of the connecting rod 2132 away from the engraving insert 2131, and the insertion part 2134 is connected to the end of the connecting rod 2132 near the elastic part 2133. The rear mold base 210 has a receiving groove 214, a connecting channel 215, and an insertion channel 216. The engraved insert 2131 is located in the receiving groove 214 and connected to the rear mold base 210. The connecting rod 2132 passes through the connecting channel 215 and is connected to the rear mold base 210. A portion of the elastic part 2133 is located in the connecting channel 215 and is connected to the rear mold base 210. The insertion part 2134 passes through the insertion channel 216 and is connected to the rear mold base 210. In this embodiment, the elastic part 2133 is a spring structure; the engraved insert 2131 is connected to one end of the connecting rod 2132, and the insertion part 2134 abuts against the end of the connecting rod 2132 near the elastic part 2133. Pulling out the insertion part 2134 separates it from the connecting rod 2132, and the connecting rod 2132 pops outward under the action of the elastic part 2133, causing the engraved insert 2131 to disengage from the receiving groove 214, thus removing the engraved insert 2131 from the receiving groove 214. Replace the new lettering insert 2131 on the connecting rod 2132 by removing it from the connecting rod 2132 and pressing it into the receiving groove 214. At this time, the elastic part 2133 is in a compressed state, and the insertion part 2134 abuts against the connecting rod 2132 to fix the position of the connecting rod 2132. This allows for quick replacement of the lettering insert 2131 without disassembling the mold, making the injection mold 10 more convenient to use.

[0048] like Figures 4 to 5 As shown, in one embodiment, the angle between the extending direction of the connecting channel 215 and the extending direction of the insertion channel 216 is 90°. In this embodiment, the extending direction of the connecting channel 215 and the extending direction of the insertion channel 216 are perpendicular to each other, that is, the insertion part 2134 is perpendicularly connected to the connecting rod 2132, so that the insertion part 2134 fixes the position of the connecting rod 2132 by insertion, thereby making the connection between the insertion part 2134 and the connecting rod 2132 simpler and thus making the connection between the insertion part 2134 and the connecting rod 2132 more convenient.

[0049] The present invention also provides a mold forming device, including the injection mold 10 described in any of the above embodiments.

[0050] Compared with the prior art, the present invention has at least the following advantages:

[0051] 1. Since the rear mold assembly 200 is connected to the front mold assembly 100, the rear mold assembly 200 is used to allow the semi-finished product formed in the first front cavity 1112a to enter the second front cavity 1212a for a second injection molding when it is rotated and separated from the front mold assembly 100. During this process, it is not necessary to remove the semi-finished product formed in the first front cavity 1112a from the injection mold 10. By rotating the rear mold assembly 200 with a tool, the semi-finished product formed in the first front cavity 1112a is less likely to be deformed by external force when rotating, thereby making the precision between the products formed after the two injection moldings better.

[0052] 2. As the semi-finished product formed in the first front cavity 1112a rotates with the rear cavity 2122, it enters the second front cavity 1212a. During this process, there is no need to wait for the semi-finished product formed in the first front cavity 1112a to cool down before operation. This allows the semi-finished product formed in the first front cavity 1112a to be injection molded more quickly in the second injection molding. As a result, the semi-finished product formed in the first front cavity 1112a is not hardened during the second injection molding. This results in better adhesion between the second injection molding adhesive and the semi-finished product formed in the first front cavity 1112a, and consequently, better bonding between the products formed after the two injection molding processes.

[0053] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. An injection mold, characterized in that, include: A front mold assembly includes a first front mold part and a second front mold part connected to each other. The first front mold part and the second front mold part are arranged side by side. The first front mold part forms at least one first front cavity, which is used for the first injection molding of the product to form a semi-finished product. The second front mold part forms at least one second front cavity, which is used for the second injection molding of the product. as well as A rear mold assembly is connected to the front mold assembly. The rear mold assembly forms at least one rear cavity, which communicates with the first front cavity. The rear cavity is used to fix the semi-finished product formed in the first front cavity. The rear mold assembly is used to allow the semi-finished product formed in the first front cavity to enter the second front cavity for the second injection molding when it is rotated and separated from the front mold assembly; The first front mold includes a first mold base and a plurality of connecting posts. Each connecting post is connected to the first mold base and each connecting post is also connected to the rear mold assembly. The first mold base has a snap-fit ​​groove. The first mold base includes at least one first mold cavity, at least one first snap-fit ​​part, and at least one second snap-fit ​​part. The first mold cavity, the first snap-fit ​​part, and the second snap-fit ​​part are all located in the snap-fit ​​groove and connected to the first mold base. The first mold cavity is also connected to the first snap-fit ​​part and the second snap-fit ​​part respectively. The first front cavity is formed in the first mold cavity. The second front mold includes a second mold base and a plurality of connecting posts. Each connecting post is connected to the second mold base. The second mold base forms a receiving cavity. The second mold base includes at least one second mold cavity portion and a plurality of fixing portions. The plurality of fixing portions are arranged at intervals around the second mold cavity portion. Each fixing portion is connected to the second mold cavity portion. The second mold cavity portion and each fixing portion are located in the receiving cavity and connected to the second mold base. The second front cavity is formed in the second mold cavity portion. The rear mold assembly includes a rear mold base and multiple clearance rings. The multiple clearance rings are all disposed on one outer wall of the rear mold base. The rear mold base has multiple connecting holes. The connecting post passes through the connecting holes and is connected to the rear mold base. The connecting post and the connecting hole are arranged in a one-to-one correspondence. The rear mold base includes at least one rear mold cavity and multiple fastening parts. The rear mold cavity forms multiple fastening channels. Each fastening part passes through the fastening channel and is connected to the rear mold cavity. The fastening parts and the fastening channels are arranged in a one-to-one correspondence. The multiple fastening parts are arranged at intervals around the rear mold cavity. The rear mold cavity and the multiple fastening parts are all connected to the rear mold base. The rear cavity is formed in the rear mold cavity. The rear mold cavity and the rear cavity are arranged in a one-to-one correspondence. Each of the aforementioned fastening parts includes a fastening body and a fastening switch. The fastening switch is connected to one end of the fastening body and fastens to the rear mold cavity. The fastening body passes through the fastening channel and is connected to the rear mold cavity. One end of the fastening body abuts against the outer surface of the semi-finished product. The rear mold base is provided with an engraving assembly, which includes an engraving insert, a connecting rod, an elastic part, and an insertion part. The engraving insert is connected to one end of the connecting rod, the elastic part is connected to the end of the connecting rod away from the engraving insert, and the insertion part abuts against the end of the connecting rod near the elastic part. The rear mold base forms a receiving groove, a connecting channel, and an insertion channel. The engraving insert is located in the receiving groove and connected to the rear mold base. The connecting rod passes through the connecting channel and is connected to the rear mold base. A portion of the elastic part is located in the connecting channel and is connected to the rear mold base. The insertion part passes through the insertion channel and is connected to the rear mold base.

2. The injection mold according to claim 1, characterized in that, The number of the first mold cavity, the first snap-fit ​​part, the second snap-fit ​​part, and the first front cavity are all two, and the first mold cavity, the first snap-fit ​​part, the second snap-fit ​​part and the first front cavity are arranged in a one-to-one correspondence.

3. The injection mold according to claim 1, characterized in that, There are two of each of the second mold cavity and the second front cavity, and the second mold cavity and the second front cavity are arranged in a one-to-one correspondence.

4. The injection mold according to claim 1, characterized in that, The angle between the extending direction of the connecting channel and the extending direction of the plugging channel is 90°.

5. A mold forming device, characterized in that, Including the injection mold according to any one of claims 1 to 4.

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