A mold positioning device and processing technology for injection molding

Abstract

The present invention relates to the field of injection mold positioning technology, specifically a mold positioning device and processing technology for injection molding, including: a positioning device body, the positioning device body includes a base, a fixed mold frame is fixedly installed on the top surface of the base, a fixed mold is installed on the side wall of the fixed mold frame, a movable mold frame is installed on the left side of the fixed mold frame, a slide groove is provided on the side wall of the movable mold frame, a slide cavity is provided on one side of the slide groove, a movable mold is installed on the side wall of the movable mold frame, and a guide rod is fixedly installed on the side wall of the fixed mold frame. The positioning device of the present invention can regularize the position of the mold on the mold frame when closing the mold, so that the position of the two groups of molds is fixed, and the front end of the mold is supported by the support rod to keep the two groups of molds aligned, so as to ensure that the guide column can be smoothly inserted into the guide sleeve, so as to keep the fitting surfaces of the two groups of molds aligned and improve the quality of the product.

Description

Technical Field

[0001] The invention relates to the technical field of injection mold positioning, in particular to a mold positioning device for injection molding and a processing technology. Background Art

[0002] Injection molds are tools for producing plastic products; they are also tools that give plastic products a complete structure and precise dimensions. Injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and then cooling and solidifying to obtain a molded product.

[0003] The mold is installed on the mold frame by bolts. The guide pins and guide sleeves are provided by the mold. The guide pins play a role in positioning and guiding when the mold is closed. However, there is a radial temperature difference on the surface of the mold when it is in use, which causes different thermal expansion and contraction, making the installation of the mold unstable. In addition, the mold will be affected by gravity for a long time and will tilt and sag, causing the guide pins and guide sleeves to be misaligned with each other, which will break the surface of the mold when the mold is closed.

[0004] Therefore, in order to solve the above problems, a mold positioning device and a processing technology for injection molding are proposed. Summary of the invention

[0005] The object of the present invention is to provide a mold positioning device and processing technology for injection molding, so as to solve the problem proposed in the above background technology that the mold is installed on the mold frame by bolts, the guide pins and guide sleeves are provided by the mold, and the guide pins play a positioning and guiding role when the mold is closed. When the mold is in use, there is a radial temperature difference on the surface, which leads to different thermal expansion and contraction, making the installation of the mold unstable. In addition, the mold will be affected by gravity for a long time and will tilt and sag, causing the guide pins and guide sleeves to be misaligned with each other, which will break the surface of the mold when the mold is closed.

[0006] To achieve the above object, the present invention provides the following technical solution: a mold positioning device for injection molding, comprising:

[0007] A positioning device body, the positioning device body comprising a base, a fixed mold frame is fixedly installed on the top surface of the base, a fixed mold is installed on the side wall of the fixed mold frame, a movable mold frame is installed on the left side of the fixed mold frame, a slide groove is opened on the side wall of the movable mold frame, a slide cavity is opened on one side of the slide groove, a movable mold is installed on the side wall of the movable mold frame, and a guide rod is fixedly installed on the side wall of the fixed mold frame;

[0008] A positioning structure, wherein the positioning structure comprises a tooth column, the tooth column is fixedly mounted on the side wall of the fixed mold frame, a first gear is movably mounted inside the movable mold frame, a second gear is movably mounted on one side of the first gear, a toothed disc is movably mounted inside the movable mold frame, a through hole is provided on the side wall of the toothed disc, a sliding column is movably mounted inside the through hole, a positioning claw is fixedly connected to the top end of the sliding column, a through groove is provided on the top surface of the positioning claw, a fixing block is fixedly mounted on the top surface of the positioning claw, a first coil spring is fixedly connected to the inner side of the fixing block, a support rod is movably mounted on the inner side of the fixing block, a roller is movably mounted on the top end of the support rod, and a guide groove is provided on the side wall of the positioning claw;

[0009] When the positioning claws fit with the fixed mold and the movable mold, the bottom surface of the fitting block fits with the side walls of the fixed mold and the movable mold, so that the iron column is aligned with the iron ring, and as the movable mold frame approaches the fixed mold frame, the iron column is inserted into the inside of the iron ring, the iron column and the iron ring do not contact, and there is no electricity between the iron column and the iron ring. If the front end of the fixed mold and the movable mold is tilted, the fitting block will deflect with the side walls of the fixed mold and the movable mold when fitting with the fixed mold and the movable mold, so that the iron column and the iron ring on the top surface of the fitting block are misaligned. When the mold is closed, the iron column and the iron ring are in contact, and electricity is passed between the iron column and the iron ring, and the cylinder stops running.

[0010] The present invention also provides a mold positioning process for injection molding, comprising the following steps:

[0011] S1. The cylinder pushes the movable mold frame to slide on the guide rod, and the movable mold frame approaches the fixed mold frame. The two sets of gear columns move inside the fixed mold frame and the movable mold frame. The gear column meshes with the first gear to drive the first gear to rotate. The first gear meshes with the second gear to drive the second gear to rotate. The second gear meshes with the gear plate to drive the gear plate to rotate. The gear plate drives the slide column to slide inside the slide groove. The positioning claws approach the fixed mold and the movable mold. The fixed mold and the movable mold are located in the center of the fixed mold frame and the movable mold frame.

[0012] S2. The movable mold frame approaches the fixed mold frame, the roller contacts the side walls of the fixed mold frame and the movable mold frame, the roller rolls, the support rod deflects, and the bottom end of the support rod pushes the top of the fixed mold and the movable mold, and the fixed mold and the movable mold remain flush;

[0013] S3. The positioning claw drives the sliding plate to slide inside the sliding cavity, the fitting block fits with the side walls of the fixed mold and the movable mold, the iron column is aligned with the iron ring, the iron column is inserted into the iron ring, the iron column and the iron ring do not contact, and the sound and light alarm does not start.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The positioning device of the present invention can regularize the position of the mold on the mold frame when closing the mold, so that the positions of the two sets of molds are fixed, and the front end of the mold is supported by the support rod to keep the two sets of molds aligned, so as to ensure that the guide column can be smoothly inserted into the guide sleeve, so as to keep the fitting surfaces of the two sets of molds aligned, thereby improving the quality of the product.

[0016] 2. The present invention provides a tooth column and a positioning claw. When the movable mold frame approaches the fixed mold frame, the tooth column moves inside the fixed mold frame and the movable mold frame, and the tooth column drives the first gear and the second gear to rotate. The second gear engages with the toothed disc to drive the toothed disc to rotate. The toothed disc drives the slide column to slide inside the slide groove through the through hole, so that the positioning claw approaches the fixed mold and the movable mold, and can push the fixed mold and the movable mold so that the fixed mold and the movable mold are respectively located in the middle of the side walls of the fixed mold frame and the movable mold frame, so as to achieve the regularization of the positions of the fixed mold and the movable mold.

[0017] 3. The present invention sets rollers and support rods, and when the movable mold frame approaches the fixed mold frame, the rollers are pre-fitted with the side walls of the fixed mold frame and the movable mold frame, and as the distance between the fixed mold frame and the movable mold frame continues to decrease, the rollers will roll on the side walls of the fixed mold frame and the movable mold frame, and at the same time, the angle of the support rods will be deflected, so that the bottom ends of the support rods are fitted with the side walls of the fixed mold and the movable mold, and the front ends of the fixed mold and the movable mold can be supported, so that the fixed mold and the movable mold are kept horizontal and aligned with each other, so that when closing the mold, the guide column can be smoothly inserted into the guide sleeve to keep the fitting surfaces of the two sets of molds aligned, thereby improving the quality of the product.

[0018] 4. The present invention provides a sliding plate, an iron column and an iron ring. When the positioning claw moves, it will drive the sliding plate to slide inside the sliding cavity, so that the sliding plate approaches the side walls of the fixed mold and the movable mold. When the positioning claw fits with the fixed mold and the movable mold, the bottom surface of the fitting block fits with the side walls of the fixed mold and the movable mold, so that the iron column and the iron ring are aligned, and as the movable mold frame approaches the fixed mold frame, the iron column is inserted into the iron ring, the iron column and the iron ring are not in contact, there is no electricity between the iron column and the iron ring, and the sound and light alarm does not operate. If the front end of the fixed mold and the movable mold is tilted, when the fitting block fits with the fixed mold and the movable mold, the fitting block will deflect with the side walls of the fixed mold and the movable mold, so that the iron column and the iron ring on the top surface of the fitting block are misaligned. When the mold is closed, the iron column and the iron ring are in contact, there is electricity between the iron column and the iron ring, the sound and light alarm operates, and the cylinder stops running to remind the user to check the positioning device body. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic front view of the structure of the positioning device body of the present invention;

[0020] Figure 2 It is a schematic front view of the structure of the fixed mold frame of the present invention;

[0021] Figure 3 It is a schematic side view of the structure of the movable mold frame of the present invention;

[0022] Figure 4 It is a schematic side view of the exploded structure of the toothed disc of the present invention;

[0023] Figure 5 It is a schematic side view of the structure of the slide cavity of the present invention;

[0024] Figure 6 It is a schematic front view of the structure of the support rod of the present invention;

[0025] Figure 7 It is a schematic diagram of the explosion structure of the support rod of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the movable mold frame of the present invention in a moving state;

[0027] Fig. 9 It is a schematic front cross-sectional view of the structure of the slot of the present invention.

[0028] In the figure: 1. Positioning device body; 11. Base; 12. Fixed mold frame; 13. Fixed mold; 14. Moving mold frame; 15. Slide groove; 16. Slide cavity; 17. Moving mold; 18. Guide rod; 2. Positioning structure; 21. Tooth column; 22. First gear; 23. Second gear; 24. Tooth plate; 25. Through hole; 26. Slide column; 27. Positioning claw; 28. Through groove; 29. ​​Fixed block; 210. First coil spring; 211. Support rod; 212. Roller; 213. Guide groove; 3. Alarm structure; 31. Sliding plate; 32. Fixed column; 33. Slot; 34. Fitting block; 35. Iron column; 36. Iron ring. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] See also Figure 1-9 The present invention provides an embodiment: a mold positioning device for injection molding, comprising a positioning device body 1, the positioning device body 1 comprising a base 11, a fixed mold frame 12 is fixedly installed on the top surface of the base 11, a fixed mold 13 is installed on the side wall of the fixed mold frame 12, a movable mold frame 14 is installed on the left side of the fixed mold frame 12, a slide groove 15 is provided on the side wall of the movable mold frame 14, a slide cavity 16 is provided on one side of the slide groove 15, a movable mold 17 is installed on the side wall of the movable mold frame 14, and a guide rod 18 is fixedly installed on the side wall of the fixed mold frame 12;

[0032] The positioning structure 2 includes a tooth column 21, which is fixedly mounted on the side wall of the fixed mold frame 12, a first gear 22 is movably mounted inside the movable mold frame 14, a second gear 23 is movably mounted on one side of the first gear 22, a toothed disc 24 is movably mounted inside the movable mold frame 14, a through hole 25 is provided on the side wall of the toothed disc 24, a slide column 26 is movably mounted inside the through hole 25, a positioning claw 27 is fixedly connected to the top of the slide column 26, a through groove 28 is provided on the top surface of the positioning claw 27, a fixed block 29 is fixedly mounted on the top surface of the positioning claw 27, a first coil spring 210 is fixedly connected to the inner side of the fixed block 29, and the inner side of the fixed block 29 is fixedly connected to the inner side of the fixed block 29. A support rod 211 is movably installed on the side, and a roller 212 is movably installed on the top of the support rod 211. A guide groove 213 is opened on the side wall of the positioning claw 27, so that when the fixed mold frame 12 and the movable mold frame 14 are closed, the positions of the fixed mold 13 and the movable mold 17 on the fixed mold frame 12 and the movable mold frame 14 are regularized to fix the positions of the fixed mold 13 and the movable mold 17, and the front ends of the fixed mold 13 and the movable mold 17 are supported by the support rod 211 to keep the fixed mold 13 and the movable mold 17 aligned to ensure that the guide column can be smoothly inserted into the guide sleeve to keep the fitting surfaces of the fixed mold 13 and the movable mold 17 aligned, thereby improving the quality of the product.

[0033] The alarm structure 3 includes a sliding plate 31, which is movably installed inside the sliding cavity 16. A fixed column 32 is fixedly connected to the side wall of the sliding plate 31. A slot 33 is opened at the top of the sliding plate 31. A fitting block 34 is movably installed inside the slot 33. An iron column 35 is fixedly installed on the top surface of the sliding plate 31. An iron ring 36 is installed at the right end of the iron column 35. The angles of the iron column 35 and the iron ring 36 can be adjusted by the fitting block 34, so that the iron column 35 and the iron ring 36 can be parallel to the side walls of the movable mold 17 and the fixed mold 13 respectively, so as to ensure that the inclination angles of the iron column 35 and the iron ring 36 are consistent with the inclination angles of the movable mold 17 and the fixed mold 13, so as to judge whether the fixed mold 13 and the movable mold 17 are tilted through the positional relationship between the iron column 35 and the iron ring 36.

[0034] Furthermore, an audible and visual alarm is installed on the base 11, a cylinder is fixedly connected to the left wall of the movable mold frame 14, the fixed mold 13 and the movable mold 17 are installed on the fixed mold frame 12 and the movable mold frame 14 by bolts, a guide sleeve is fixedly installed on the side wall of the fixed mold 13, and a guide column is fixedly installed on the side wall of the movable mold 17, so that the user needs to check the positioning device body 1 through the audible and visual alarm to avoid damage to the fixed mold 13 or the movable mold 17.

[0035] Furthermore, there are two groups of gear columns 21, which are fixedly mounted on the side walls of the fixed mold frame 12 and the movable mold frame 14, respectively, and the top ends of the two groups of gear columns 21 penetrate the fixed mold frame 12 and the movable mold frame 14, respectively. The gear columns 21 are meshed with the first gear 22, the first gear 22 is meshed with the second gear 23, and the second gear 23 is meshed with the toothed disc 24, so that when the fixed mold frame 12 and the movable mold frame 14 are close, the gear columns 21 can be driven to move inside the fixed mold frame 12 and the movable mold frame 14, so that the toothed disc 24 can rotate, which can drive the positioning claws 27 to clamp the fixed mold 13 and the movable mold 17.

[0036] Furthermore, the slide column 26 is slidably installed inside the slide groove 15, and the positioning claws 27 are located on the side wall of the movable mold frame 14. There are four groups of positioning claws 27, and the four groups of positioning claws 27 are distributed in a circle around the movable mold 17. The positioning claws 27 are of "L" shape, so that the slide column 26 can slide inside the slide groove 15 to drive the positioning claws 27 to adjust the positions of the fixed mold 13 and the movable mold 17 to ensure that the fixed mold 13 and the movable mold 17 are aligned.

[0037] Furthermore, the support rod 211 is installed in an inclined manner, and the top end of the first coil spring 210 is fixedly connected to the side wall of the support rod 211. The structures on the fixed mold frame 12 and the movable mold frame 14 are the same, so that when the roller 212 contacts the side walls of the fixed mold frame 12 and the movable mold frame 14, it can push the support rod 211 to deflect, so that the bottom end of the support rod 211 is close to the fixed mold 13 and the movable mold 17, which is convenient for supporting and fixing the front ends of the fixed mold 13 and the movable mold 17 to keep the fixed mold 13 and the movable mold 17 horizontally aligned.

[0038] Furthermore, the two groups of sliding plates 31 are respectively located on the upper and lower sides of the movable mold 17, the fixed column 32 passes through the positioning claw 27 via the guide groove 213, and a second coil spring is installed at the connection between the fitting block 34 and the inner wall of the slot 33. The iron ring 36 is installed on the top surface of the sliding plate 31 on the side wall of the fixed mold frame 12. The iron column 35 and the iron ring 36 are both electrically connected to the sound and light alarm, so that the angles of the iron column 35 and the iron ring 36 can be consistent with the inclination angles of the fixed mold 13 and the movable mold 17, so that when the mold is closed, it is convenient to judge whether the fixed mold 13 and the movable mold 17 are aligned by whether the iron column 35 is in contact with the iron ring 36, thereby reducing production losses and further improving the safety of the positioning device body 1.

[0039] Example 2

[0040] On the basis of Example 1, the cylinder pushes the movable mold frame 14 to approach the fixed mold frame 12, the movable mold frame 14 slides on the guide rod 18, the tooth column 21 moves inside the fixed mold frame 12 and the movable mold frame 14, the tooth column 21 drives the first gear 22 and the second gear 23 to rotate, the second gear 23 engages with the toothed disc 24, drives the toothed disc 24 to rotate, and the toothed disc 24 drives the slide column 26 to slide inside the slide groove 15, so that the positioning claws 27 on the fixed mold frame 12 and the movable mold frame 14 approach the fixed mold 13 and the movable mold 17 respectively, and push the fixed mold 13 and the movable mold 17, so that the fixed mold 13 and the movable mold 17 are respectively located in the middle of the side walls of the fixed mold frame 12 and the movable mold frame 14, so as to realize the regularization of the positions of the fixed mold 13 and the movable mold 17;

[0041] Then the roller 212 fits with the side walls of the fixed mold frame 12 and the movable mold frame 14, and as the distance between the fixed mold frame 12 and the movable mold frame 14 continues to decrease, the roller 212 will roll on the side walls of the fixed mold frame 12 and the movable mold frame 14, and the angle of the support rod 211 will deflect, so that the bottom end of the support rod 211 fits with the side walls of the fixed mold 13 and the movable mold 17, which can support the front ends of the fixed mold 13 and the movable mold 17, so that the fixed mold 13 and the movable mold 17 remain horizontal and aligned with each other, so that when closing the mold, the guide column can be smoothly inserted into the guide sleeve to keep the fitting surfaces of the two sets of molds aligned, thereby improving the quality of the product.

[0042] At the same time, the positioning claw 27 drives the sliding plate 31 to slide inside the sliding cavity 16 through the fixed column 32, so that the sliding plate 31 approaches the side walls of the fixed mold 13 and the movable mold 17. When the positioning claw 27 fits with the fixed mold 13 and the movable mold 17, the bottom surface of the fitting block 34 fits with the side walls of the fixed mold 13 and the movable mold 17, so that the iron column 35 is aligned with the iron ring 36, and as the movable mold frame 14 approaches the fixed mold frame 12, the iron column 35 is inserted into the iron ring 36, and the iron column 35 does not contact the iron ring 36. There is no electricity between 35 and the iron ring 36, and the sound and light alarm does not work. If the front ends of the fixed mold 13 and the movable mold 17 are tilted, the bonding block 34 will deflect with the side walls of the fixed mold 13 and the movable mold 17 when bonding with the fixed mold 13 and the movable mold 17, so that the iron column 35 and the iron ring 36 on the top surface of the bonding block 34 are misaligned. When the mold is closed, the iron column 35 contacts with the iron ring 36, and electricity is supplied between the iron column 35 and the iron ring 36, the sound and light alarm works, and the cylinder stops running to remind the user to check the positioning device body 1.

[0043] Example 3

[0044] The present invention also provides a mold positioning process for injection molding, and the specific steps are as follows:

[0045] S1. The cylinder pushes the movable mold frame 14 to slide on the guide rod 18, and the movable mold frame 14 approaches the fixed mold frame 12. The two sets of tooth columns 21 move inside the fixed mold frame 12 and the movable mold frame 14. The tooth column 21 meshes with the first gear 22, driving the first gear 22 to rotate. The first gear 22 meshes with the second gear 23, driving the second gear 23 to rotate. The second gear 23 meshes with the toothed disc 24, driving the toothed disc 24 to rotate. The toothed disc 24 drives the slide column 26 to slide inside the slide groove 15. The positioning claw 27 approaches the fixed mold 13 and the movable mold 17. The fixed mold 13 and the movable mold 17 are located at the center of the fixed mold frame 12 and the movable mold frame 14.

[0046] S2. The movable mold frame 14 is close to the fixed mold frame 12, the roller 212 contacts the side walls of the fixed mold frame 12 and the movable mold frame 14, the roller 212 rolls, the support rod 211 deflects, and the bottom end of the support rod 211 pushes the top of the fixed mold 13 and the movable mold 17, and the fixed mold 13 and the movable mold 17 remain flush;

[0047] S3. The positioning claw 27 drives the sliding plate 31 to slide inside the sliding cavity 16, the fitting block 34 fits with the fixed mold 13 and the movable mold 17, the iron column 35 is aligned with the iron ring 36, the iron column 35 is inserted into the iron ring 36, the iron column 35 does not contact the iron ring 36, and the sound and light alarm is not activated.

[0048] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A mold positioning device for injection molding, characterized in that: include: A positioning device body, the positioning device body comprising a base, a fixed mold frame is fixedly installed on the top surface of the base, a fixed mold is installed on the side wall of the fixed mold frame, a movable mold frame is installed on the left side of the fixed mold frame, a slide groove is opened on the side wall of the movable mold frame, a slide cavity is opened on one side of the slide groove, a movable mold is installed on the side wall of the movable mold frame, and a guide rod is fixedly installed on the side wall of the fixed mold frame; The positioning structure includes a gear column, and the gear column has two groups. The two groups of gear columns are fixedly mounted on the side walls of the fixed mold frame and the movable mold frame respectively, and the top ends of the two groups of gear columns penetrate the fixed mold frame and the movable mold frame respectively. The gear column is meshed with a first gear, the first gear is meshed with a second gear, and the second gear is meshed with a toothed disc. The first gear is movably mounted inside the movable mold frame, and the second gear is movably mounted on one side of the first gear. The toothed disc is movably mounted inside the movable mold frame, and a through hole is provided on the side wall of the toothed disc. A sliding column is movably mounted inside the through hole, and a positioning claw is fixedly connected to the top end of the sliding column. The positioning claw A through groove is provided on the top surface, a fixed block is fixedly installed on the top surface of the positioning claw, a first coil spring is fixedly connected to the inner side of the fixing block, a support rod is movably installed on the inner side of the fixing block, a roller is movably installed on the top end of the support rod, a guide groove is provided on the side wall of the positioning claw, the support rod is installed in an inclined manner, the top end of the first coil spring is fixedly connected to the side wall of the support rod, the fixed mold frame and the movable mold frame have the same structure, the slide column is slidably installed inside the slide groove, the positioning claw is located on the side wall of the movable mold frame, there are four groups of positioning claws, and the four groups of positioning claws are circularly distributed around the movable mold, and the positioning claw is an "L" shaped structure; It also includes an alarm structure, which includes a sliding plate, which is movably installed inside the sliding cavity, a fixed column is fixedly connected to the side wall of the sliding plate, a slot is opened on the top of the sliding plate, a fitting block is movably installed inside the slot, an iron column is fixedly installed on the top surface of the sliding plate, and an iron ring is installed on the right end of the iron column; When the positioning claws fit with the fixed mold and the movable mold, the bottom surface of the fitting block fits with the side walls of the fixed mold and the movable mold, so that the iron column is aligned with the iron ring, and as the movable mold frame approaches the fixed mold frame, the iron column is inserted into the inside of the iron ring, the iron column and the iron ring do not contact, and there is no electricity between the iron column and the iron ring. If the front end of the fixed mold and the movable mold is tilted, the fitting block will deflect with the side walls of the fixed mold and the movable mold when fitting with the fixed mold and the movable mold, so that the iron column and the iron ring on the top surface of the fitting block are misaligned. When the mold is closed, the iron column and the iron ring are in contact, and electricity is passed between the iron column and the iron ring, and the cylinder stops running.

2. The mold positioning device for injection molding according to claim 1, characterized in that: An audible and visual alarm is installed on the base, a cylinder is fixedly connected to the left side wall of the movable mold frame, the fixed mold and the movable mold are installed on the fixed mold frame and the movable mold frame by bolts, a guide sleeve is fixedly installed on the side wall of the fixed mold, and a guide column is fixedly installed on the side wall of the movable mold.

3. The mold positioning device for injection molding according to claim 2, characterized in that: The two groups of sliding plates are respectively located on the upper and lower sides of the movable mold, the fixed column passes through the positioning claw via a guide groove, a second coil spring is installed at the connection between the fitting block and the inner wall of the slot, the iron ring is installed on the top surface of the sliding plate on the side wall of the fixed mold frame, and the iron column and the iron ring are both electrically connected to the sound and light alarm.

4. A mold positioning process for injection molding, using the mold positioning device for injection molding according to claim 3, characterized in that: The following steps are involved: S1. The cylinder pushes the movable mold frame to slide on the guide rod, and the movable mold frame approaches the fixed mold frame. The two sets of gear columns move inside the fixed mold frame and the movable mold frame. The gear column meshes with the first gear to drive the first gear to rotate. The first gear meshes with the second gear to drive the second gear to rotate. The second gear meshes with the gear plate to drive the gear plate to rotate. The gear plate drives the slide column to slide inside the slide groove. The positioning claws approach the fixed mold and the movable mold. The fixed mold and the movable mold are located in the center of the fixed mold frame and the movable mold frame. S2. The movable mold frame approaches the fixed mold frame, the roller contacts the side walls of the fixed mold frame and the movable mold frame, the roller rolls, the support rod deflects, and the bottom end of the support rod pushes the top of the fixed mold and the movable mold, and the fixed mold and the movable mold remain flush; S3. The positioning claw drives the sliding plate to slide inside the sliding cavity, the fitting block fits with the side walls of the fixed mold and the movable mold, the iron column is aligned with the iron ring, the iron column is inserted into the iron ring, the iron column and the iron ring do not contact, and the sound and light alarm does not start.

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