Head plate of injection molding machine

Abstract

The utility model discloses an injection molding machine head plate which is characterized by comprising a head plate main body, mounting seats are integrally formed at four corners of the head plate main body, first through holes are formed in the mounting seats, first supporting legs are symmetrically arranged on the two mounting seats at the lower part, a plurality of first mounting holes are formed in the first supporting legs, and a plurality of second through holes are formed in the second supporting legs. The head plate body comprises a front plate part, a rear plate part and a middle reinforcing part, the middle reinforcing part comprises a center ring section, four first supporting sections are arranged on the side face of the center ring section, and the front plate part is provided with two rows of pre-fixing grooves which are symmetrically distributed and used for the heads of positioning bolts to slide in. According to the utility model, the positioning bolts can be aligned only by moving left and right after entering the T-shaped grooves, and can be finely adjusted left and right after being centered, so that the three-dimensional fine adjustment difficulty is obviously reduced, the penetration and pre-tightening operation of a plurality of groups of bolts can be more stable and safer, and the situation that local gaps exist on the binding surface of the fixed mold and the head plate is avoided; and the mold closing precision is improved.

Description

Technical Field

[0001] The utility model relates to a component of a mold clamping mechanism of an injection molding machine, and more particularly to a head plate of an injection molding machine. Background Art

[0002] The head plate of the injection molding machine is the core load-bearing component of the mold clamping system. The fixed mold mounting surface on its front side must withstand periodic high-tonnage clamping forces. Traditional head plates mostly use a uniformly distributed threaded hole array design. When installing the fixed mold, the mold positioning ring needs to be aligned with the center hole of the head plate. The operator uses more than ten sets of high-strength bolts to sequentially penetrate the mold fixing plate and the threaded holes of the head plate to tighten. Although this structure can ensure the reliability of the connection, there are the following problems in the actual assembly process: Due to the large weight of the mold, the mold needs to be suspended by a crane and kept in a suspended state during installation. Workers need to simultaneously perform three-dimensional position fine-tuning. Under these dynamic conditions, the insertion and pre-tightening of multiple sets of bolts can easily lead to local gaps between the mold and the head plate fitting surface, affecting the mold clamping accuracy. Utility Model Content

[0003] The purpose of the present utility model is to provide an injection molding machine head plate in order to solve the above-mentioned problems.

[0004] The above technical objectives of the present utility model are achieved through the following technical solutions: a head plate of an injection molding machine, including a head plate body, mounting seats integrally formed on the four corners of the head plate body, a first through hole for the pull rod to pass through is provided on the mounting seat, and first support legs are symmetrically provided on the two lower mounting seats, and a plurality of first mounting holes are provided on the first support legs. An injection molding hole is provided at the center position of the head plate body, and the head plate body includes a front plate portion, a rear plate portion and an intermediate reinforcement portion located between the front plate portion and the rear plate portion, and the intermediate reinforcement portion includes a central ring segment, and a first support segment corresponding to the four mounting seats and distributed in a circular array is provided on the side of the central ring segment, and two rows of symmetrically distributed pre-fixing grooves for positioning the bolt heads to slide into are provided on the side of the front plate portion away from the intermediate reinforcement portion.

[0005] Preferably, the pre-fixing groove consists of a T-slot and an insertion hole, the T-slot and the insertion hole are connected to each other, and the diameter of the insertion hole is greater than or equal to the bottom width of the T-slot.

[0006] Preferably, the lower surface of the head panel body is integrally formed with two symmetrically distributed second legs and two symmetrically distributed support blocks, the second legs are provided with second mounting holes, and the bottom surfaces of the first legs, the second legs and the support blocks are all on the same plane.

[0007] Preferably, the intermediate reinforcement portion also includes two lateral support segments and two vertical support segments, and a second support segment is fixedly connected between the two sides of the lateral support segment and the two adjacent mounting seats, and a third support segment is fixedly connected between the two sides of the vertical support segment and the two adjacent mounting seats.

[0008] Preferably, a first reinforcing rib is integrally formed between the first supporting segment and the transverse supporting segment, and two second reinforcing ribs are integrally formed between the first supporting segment and the vertical supporting segment.

[0009] Preferably, the thicknesses of the first support segment, the second support segment, the third support segment, the transverse support segment and the vertical support segment are all the same, the thicknesses of the first reinforcement edge and the second reinforcement edge are the same, and the thickness of the first reinforcement edge is less than the thickness of the first support segment.

[0010] Preferably, the first support segment, the second support segment, the third support segment and the vertical support segment are all provided with a second through hole.

[0011] Preferably, the injection holes are divided into shrinkage holes and straight holes, the shrinkage holes and straight holes are connected to each other, and the straight hole is arranged at the center of the front plate portion, and the diameter of the shrinkage hole gradually decreases from the rear plate portion to the front plate portion.

[0012] In summary, the present invention has the following beneficial effects:

[0013] When installing the mold according to the utility model, the eight positioning bolts are first inserted into the corresponding holes of the fixed mold in reverse and the nuts are screwed on. Then the fixed mold is driven close to the front plate so that the four positioning bolts on the left are aligned with the insertion holes of the front plate and inserted. At this time, the four positioning bolts on the right are located at the opening position of the T-slot and only need to be moved left and right for alignment. After quick centering, only fine-tuning is performed left and right, which significantly reduces the difficulty of three-dimensional fine-tuning. After the positioning ring of the fixed mold is aligned with the injection hole of the head plate body, the nuts on the positioning bolts are tightened. After that, the insertion and pre-tightening operations of multiple sets of bolts will be more stable and safe, thereby avoiding the situation where local gaps appear on the fitting surfaces of the fixed mold and the head plate body, improving the mold closing accuracy, and effectively solving the problems of low efficiency and poor positioning accuracy of traditional installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front perspective view of the present utility model;

[0015] Figure 2 It is a back perspective view of the present invention;

[0016] Figure 3 It is a cross-sectional view of the present utility model.

[0017] Figure markings: 1. Head plate main body; 11. Front plate portion; 12. Middle reinforcement portion; 121. Center ring section; 122. First support section; 123. Horizontal support section; 124. Second support section; 125. Second through hole; 126. Vertical support section; 127. Third support section; 128. First reinforcement rib; 129. Second reinforcement rib; 13. Rear plate portion; 2. Mounting seat; 21. First through hole; 3. Pre-fixing groove; 31. T-slot; 32. Insertion hole; 41. Straight hole; 42. Shrinkage hole; 51. First support leg; 511. First mounting hole; 52. Second support leg; 521. Second mounting hole; 53. Support block. DETAILED DESCRIPTION

[0018] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0019] like Figure 1-Figure 3 As shown, an injection molding machine head plate includes a head plate body 1, and mounting seats 2 are integrally formed on the four corners of the head plate body 1. The mounting seats 2 are provided with first through holes 21 for the pull rod to pass through. First legs 51 are symmetrically provided on the two lower mounting seats 2. The first legs 51 are provided with multiple first mounting holes 511. An injection hole is provided at the center of the head plate body 1. The head plate body 1 includes a front plate portion 11, a rear plate portion 13, and an intermediate reinforcement portion 12 located between the front plate portion 11 and the rear plate portion 13. The middle reinforcement portion 12 includes a central ring segment 121. The side of the central ring segment 121 is provided with a first support segment 122 corresponding to the four mounting seats 2 and distributed in a circular array. The side of the front plate portion 11 away from the middle reinforcement portion 12 is provided with two rows of symmetrically distributed pre-fixing grooves 3 for positioning the bolt heads to slide into. The pre-fixing groove 3 is composed of a T-slot 31 and an insertion hole 32. The T-slot 31 and the insertion hole 32 are connected to each other, and the diameter of the insertion hole 32 is greater than or equal to the bottom width of the T-slot 31.

[0020] It is worth mentioning that there are four pre-fixing grooves 3 in each row, and they are symmetrically distributed up and down.

[0021] It can be understood that the front side of the front plate 11 serves as the contact surface of the fixed mold. Since the bottom width of the T-slot 31 is slightly larger than the diameter of the positioning bolt head, the diameter of the insertion hole 32 is also slightly larger than the diameter of the positioning bolt head. When installing the mold, first insert the eight positioning bolts into the corresponding holes of the fixed mold in reverse and screw on the nuts. Then drive the fixed mold closer to the front plate 11 so that the four positioning bolts on the left are aligned with the insertion holes 32 of the front plate 11 and inserted. At this time, the four positioning bolts on the right are located at the opening position of the T-slot 31 and only need to be moved left and right for positioning. After quick centering, only fine-tuning is performed left and right, which significantly reduces the difficulty of three-dimensional fine-tuning. After the positioning ring of the fixed mold is aligned with the injection hole of the head plate main body 1, the nuts on the positioning bolts are tightened. After that, the insertion and pre-tightening operations of multiple sets of bolts will be more stable and safe, thereby avoiding the situation where local gaps appear on the fitting surface between the fixed mold and the head plate main body 1, thereby improving the mold closing accuracy.

[0022] It is worth mentioning that the middle reinforcement part 12 adopts a composite structure of a central ring segment 121 and a radial support segment. The central ring segment 121 is coaxially arranged with the injection hole, and four groups of first support segments 122 evenly distributed in a circle extend from its outer edge. Each group of support segments is rigidly connected to the mounting seats 2 at the four corners to form a stable force conduction path.

[0023] Furthermore, the lower surface of the head panel body 1 is integrally formed with two symmetrically distributed second legs 52 and two symmetrically distributed support blocks 53, and a second mounting hole 521 is provided on the second leg 52. The bottom surfaces of the first leg 51, the second leg 52 and the support block 53 are all on the same plane.

[0024] It can be understood that two groups of first legs 51, two groups of second legs 52 and two support blocks 53 are provided at the bottom of the head panel body 1. The bottom surfaces of all the legs and support blocks 53 are precisely processed to form a unified reference plane, so that the head panel body 1 has self-balancing characteristics when installed on the ground, effectively eliminating the installation deviation caused by the uneven platform.

[0025] Furthermore, the middle reinforcement portion 12 also includes two lateral support sections 123 and two vertical support sections 126. The second support section 124 is fixedly connected between the two sides of the lateral support section 123 and the two adjacent mounting seats 2, and the third support section 127 is fixedly connected between the two sides of the vertical support section 126 and the two adjacent mounting seats 2.

[0026] It can be understood that the lateral support section 123 and the vertical support section 126 are arranged crosswise in the middle reinforcement portion 12, and the two ends of the lateral support section 123 are connected to the adjacent mounting seat 2 through the second support section 124, and the vertical support section 126 is connected to the adjacent mounting seat 2 through the third support section 127. The multi-directional support structure enables the clamping force to be dispersed and transmitted along the preset direction.

[0027] Furthermore, a first reinforcing rib 128 is integrally formed between the first supporting segment 122 and the transverse supporting segment 123 , and two second reinforcing ribs 129 are integrally formed between the first supporting segment 122 and the vertical supporting segment 126 .

[0028] It can be understood that reinforcing ribs are provided between the first support section 122 and the transverse support section 123 and the vertical support section 126, wherein the first reinforcing rib 128 adopts a single-rib design and the second reinforcing rib 129 is a double-rib parallel arrangement, thereby ensuring structural rigidity while avoiding excessive stress concentration.

[0029] Furthermore, the thicknesses of the first support segment 122 , the second support segment 124 , the third support segment 127 , the transverse support segment 123 and the vertical support segment 126 are all the same, the thicknesses of the first reinforcing rib 128 and the second reinforcing rib 129 are the same, and the thickness of the first reinforcing rib 128 is less than the thickness of the first support segment 122 .

[0030] Furthermore, the first support segment 122 , the second support segment 124 , the third support segment 127 and the vertical support segment 126 are all provided with a second through hole 125 .

[0031] It is understandable that a second through hole 125 is provided on each support segment, and the diameter of the through hole is optimized through finite element analysis, so as to ensure that the bending section coefficient of the support segment meets the design requirements while meeting the requirements of casting and reducing the overall weight.

[0032] Furthermore, the injection hole is divided into a shrinkage hole 42 and a straight hole 41 , the shrinkage hole 42 and the straight hole 41 are connected to each other, and the straight hole 41 is set at the center of the front plate portion 11 , and the diameter of the shrinkage hole 42 gradually decreases from the rear plate portion 13 to the front plate portion 11 .

[0033] It can be understood that the injection hole adopts a segmented structure. The shrinkage hole 42 near the rear plate 13 adopts a conical design, and its diameter gradually increases from the front plate 11 to the rear plate 13. The straight hole 41 section maintains a constant aperture. This variable diameter structure not only meets the flow characteristics of the molten plastic, but also enhances the sealing of the nozzle installation through the tapered surface fit.

[0034] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An injection molding machine head plate, characterized in that: The invention comprises a head plate body (1), wherein mounting seats (2) are integrally formed on the four corners of the head plate body (1), a first through hole (21) for a pull rod to pass through is provided on the mounting seat (2), first legs (51) are symmetrically provided on the two lower mounting seats (2), a plurality of first mounting holes (511) are provided on the first legs (51), an injection hole is provided at the center position of the head plate body (1), the head plate body (1) comprises a front plate portion (11), a rear plate portion (13) and an intermediate reinforcement portion (12) located between the front plate portion (11) and the rear plate portion (13), the intermediate reinforcement portion (12) comprises a central ring segment (121), a side of the central ring segment (121) is provided with a first support segment (122) correspondingly connected to the four mounting seats (2) and distributed in a circumferential array, and two rows of symmetrically distributed pre-fixing grooves (3) for the positioning bolt heads to slide into are provided on the side of the front plate portion (11) away from the intermediate reinforcement portion (12).

2. The injection molding machine head plate according to claim 1, characterized in that: The pre-fixing groove (3) consists of a T-shaped groove (31) and an insertion hole (32); the T-shaped groove (31) and the insertion hole (32) are connected to each other, and the diameter of the insertion hole (32) is greater than or equal to the bottom width of the T-shaped groove (31).

3. The injection molding machine head plate according to claim 1, characterized in that: The lower surface of the head panel body (1) is integrally formed with two symmetrically distributed second legs (52) and two symmetrically distributed support blocks (53); the second legs (52) are provided with second mounting holes (521); and the bottom surfaces of the first legs (51), the second legs (52) and the support blocks (53) are all on the same plane.

4. The injection molding machine head plate according to claim 1, characterized in that: The intermediate reinforcement portion (12) further comprises two transverse support segments (123) and two vertical support segments (126), wherein a second support segment (124) is fixedly connected between two adjacent mounting seats (2) on both sides of the transverse support segment (123), and a third support segment (127) is fixedly connected between two adjacent mounting seats (2) on both sides of the vertical support segment (126).

5. The injection molding machine head plate according to claim 4, characterized in that: A first reinforcing rib (128) is integrally formed between the first supporting section (122) and the transverse supporting section (123), and two second reinforcing ribs (129) are integrally formed between the first supporting section (122) and the vertical supporting section (126).

6. The injection molding machine head plate according to claim 5, characterized in that: The thicknesses of the first support section (122), the second support section (124), the third support section (127), the transverse support section (123), and the vertical support section (126) are all the same, the thicknesses of the first reinforcement edge (128) and the second reinforcement edge (129) are the same, and the thickness of the first reinforcement edge (128) is less than the thickness of the first support section (122).

7. The injection molding machine head plate according to claim 4, characterized in that: The first support segment (122), the second support segment (124), the third support segment (127) and the vertical support segment (126) are all provided with a second through hole (125).

8. The injection molding machine head plate according to claim 1, characterized in that: The injection hole is divided into a shrinkage hole (42) and a straight hole (41), the shrinkage hole (42) and the straight hole (41) are connected to each other, and the straight hole (41) is arranged at the center of the front plate portion (11), and the diameter of the shrinkage hole (42) gradually decreases from the rear plate portion (13) to the front plate portion (11).

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