JPH0232950A - Synthetic resin container with handle and its manufacture - Google Patents

Abstract

PURPOSE:To obtain a synthetic resin container with handle, for which a handle has been firmly and securely fixed on the container, by performing a fixing of the handle with a structure in which a protrusion of the container main body has been inserted in a ring at the attaching part, and the tip of the protrusion has been extended into a flange shape. CONSTITUTION:A synthetic resin container with handle is composed of a container main body 1 and a handle 2. At the approximate center of a concavity 8, which has been provided under a conical trapezoid shaped shoulder part 7 of the container main body 1, a protrusion 12 has been provided. The protrusion 12 has been formed so that the vertical cross section gives a non-circular shape. A fixing of the handle 2 to the container main body 1 is performed by inserting the protrusion 12 in a ring shaped attaching part 21 of the handle 2, extending the tip of the protrusion 12 to be a flange part 14, and making the ring shaped attaching part 21 engage with the flange part 14. Also, at the root of the protrusion 12, a groove 19 has been formed. When the ring shaped attaching part 21 is placed in this groove 19, a fixing of the ring shaped attaching part 21 in the right angle direction to the diameter is effectively performed, and the chattering can be prevented. Therefore, the handle is prevented from slipping off, and the fixing of the handle to the container can be securely and firmly performed.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a synthetic resin container with a handle and a method for manufacturing the same, and more specifically, the present invention relates to a synthetic resin container with a grip and a method for manufacturing the same. The present invention relates to a synthetic resin container with a handle that is easy to grip even when fully filled and can be stored compactly in a case, and a method for manufacturing the same.

(Prior Art) Plastic hollow containers are widely used as packaging containers for various liquids because they are lightweight and have excellent impact resistance.
Hollow containers made by stretch-blow molding (PET) have a combination of transparency, gas barrier properties, light weight, impact resistance, and moderate rigidity, and are widely used as packaging containers for containing liquid contents. It is used.

It is desired that the flame-resistant type of stretch blow molded container be equipped with a handle for ease of handling.
Since it is difficult in principle to form a handle integrally with a container in a stretch blow molding process, several proposals have been made for attaching a handle to a stretch blow molded container.

For example, a method of manufacturing a stretch-blow-molded container integrated with the handle by pre-forming the handle, placing it in a blow mold, and stretch-blowing a preform for molding the container (Japanese Patent Laid-Open No. 56-64948 No. 56-64949 and 56-
74438), a station for molding a container parison by an injection unit, a station for stretch-blow molding the parison, an injection mold arranged around the container,
A method for producing a container with a handle by arranging in a rotary a station for applying internal pressure in the container and injecting the handle with another injection unit, and a station for taking out the container with a handle (
Japanese Unexamined Patent Application Publication No. 12-182044 has been proposed.

(Problems to be Solved by the Invention) When forming a handle on a container, a plurality of circumferential grooves are formed around the container, and a plurality of band sections that tightly surround the circumferential groove and this band are formed. It is common to connect the parts and form a handle with a grip part integrally formed therewith.

However, the presence of such a band portion is not desirable in terms of the appearance characteristics of the container, and forming the band portion around the container by injection molding is likely to cause molding defects such as the occurrence of flakes and weld marks. The secure and firm fixation of the handle has not yet been fully satisfied.

Therefore, an object of the present invention is to provide a synthetic resin container with a handle, in which the handle is firmly and reliably fixed to the container without using the above-mentioned band, and which has outstanding appearance characteristics, and a method for manufacturing the same. .

Another object of the present invention is to provide a synthetic resin container with a handle, which is easy to grip because the handle is provided near the center of gravity of the container when filled with liquid, and which can be stored compactly in a case, and a method for manufacturing the same. is to provide.

(Means for Solving the Problems) According to the present invention, the neck portion, the shoulder portion, and the closed bottom portion are integrally molded by blow molding or stretch blow molding of synthetic resin, and the recessed portion is formed in a part of the buttocks. A container body comprising a recess provided so that the diameter is approximately the same as that of the neck or slightly larger than the neck, and a protrusion provided approximately in the center of the recess so as to have a non-perfect circular cross section. a handle comprising an endless gripping part and a mounting part integrally molded by injection molding of synthetic resin, and the mounting part is a ring having a similar shape to the projection part; A synthetic resin container with a handle, characterized in that the handle is fixed to the container body by being inserted into a ring of the attachment part and having a structure in which the tip of the protrusion is expanded into a flange shape. provided.

According to the present invention, a parison made of synthetic resin is placed in a blow mold, and has a neck, a body, and a closed bottom, and a part of the body has a recessed part that is approximately the same as the neck or slightly larger than the neck. A step of blow molding or stretch blow molding a container body having a recess provided to have a diameter and a protrusion provided approximately at the center of the recess so as to have a non-perfect circular cross section; preferably a container main body. pressing the protrusion with a push-in pin while blow molding pressure remains within the mold to form a flange at the tip of the protrusion; and inserting the container body with the flange formed into the injection mold; A step of injecting synthetic resin and molding a handle having an endless gripping part and a mounting part, the mounting part being a ring surrounding a protrusion between a flange and a recess; A manufacturing method is provided.

According to the present invention, the present invention further includes a step of molding a handle including an endless gripping part and a mounting part, and in which the mounting part has a non-perfect circular shape, by injection molding of synthetic resin: inserting the handle into a blow mold. A synthetic resin parison is placed in a blow mold with a neck, a body, and a closed bottom, and a part of the body is provided so that the recessed part has a diameter that is approximately the same as or slightly larger than the neck. A step of blow molding or stretch blow molding a container body having a recessed portion and a protrusion provided so as to fit the ring into approximately the center of the recess; and preferably blow molding pressure remains within the container body. There is provided a method for manufacturing a synthetic resin container with a handle, comprising: pressing the protrusion with a push pin to form a flange at the tip of the protrusion.

(Function) The container body of the present invention is the same as the conventional container in that it includes a neck, a body, and a closed bottom that are integrally molded by blow molding or stretch blow molding of synthetic resin. A recess is provided in a part of the part so that the most recessed part has a diameter that is approximately the same as or slightly larger than the neck, and a protrusion is provided approximately in the center of this recess so that the cross section is non-perfectly circular. One of the features is that it is provided.

On the other hand, the handle used in the present invention is the same as the conventional one in that it consists of a gripping part and a mounting part to the container body, but the gripping part and the mounting part are configured as endless ones, and the mounting part is attached to the container body. The second feature is that it is a ring with a similar shape to the protrusion.

In the present invention, the container body and the handle are integrally joined in the blow molding or stretch blow molding process of the container body or the injection molding process of the handle, but the protrusion of the container body is inserted into the ring of the attachment part, and The third feature is that the handle is fixed to the container body by having a structure in which the tip of the protrusion expands outward into a flange shape.

In the present invention, these features are combined to achieve the following effects. In other words, a recess is formed in the body so that the recess has a diameter that is approximately the same as or slightly larger than that of the neck, and a protrusion is formed approximately in the center of the recess. During stretch blow molding, the recesses and protrusions mentioned above are close to the parison wall, so they remain thicker than the other walls of the body, and as a result, the protrusions for attaching the handle and the protrusions that support these protrusions are The concave portion creates a strong structure that is less likely to deform. In addition, by inserting this protrusion into the ring shape of the handle and expanding its tip outward to form a flange shape, the handle can be prevented from coming off.
Moreover, by making the cross-sectional shape of the protrusion non-circular, relative rotation between the handle and the container body is also suppressed. especially,
When the distal end surface of the protrusion is formed as a concave surface, the outward protrusion of the flange shape is sufficiently large and reliably performed, so that the handle can be prevented from being pulled out and the grip can be fixed even more reliably.

As a result, the handle can be securely and firmly fixed to the container.

In addition, since the gripping part and the attachment part of the handle are each provided in the form of an endless ring, the handle has a relatively low basis weight and is strong, so it does not damage the appearance of the container and does not damage the product. can increase value.

Furthermore, since the attachment part of the handle is located near the center of the container, that is, close to the center of gravity, when the handle is gripped even when the container is filled with liquid, the moment applied to the attachment part and the grip part is reduced. It is small and easy to hold, and requires little force. Further, since the handle is formed in the recess of the container and the grip portion is an endless ring, it is easy to insert a hand into the container.

Furthermore, since the gripping part of the handle is provided on the same level as or inward from the outermost surface of the container body, it can be stored compactly in the case, requiring less space for storage and transportation. There is also the advantage of being able to live.

(Example) In FIG. 1 showing an example of a synthetic resin container with a handle of the present invention, this synthetic resin container with a handle is composed of a container body generally designated by 1 and a handle generally designated by 2. A cap 3 is fastened to.

In FIGS. 2 to 5, the container body 1 consists of a neck 4, a cylindrical body 5 and a closed bottom 6, and between the neck 4 and the body 5 there is a truncated conical shoulder 7. This truncated conical shoulder 7
A recess 8 is provided below. When viewed from the side, this recess 8 is made up of an upper surface 9 extending slightly inclined toward the center of the container, a side surface 10 extending almost perpendicularly, and a lower surface 11 extending slightly inclined toward the cell side. , in the embodiment shown in the drawings, is provided between the truncated conical shoulder 7 and approximately the middle of the body 5 in the height direction. The concave side surface 10 is provided in a substantially arc shape so that the most concave portion has a diameter (distance 11i from the axis) that is approximately the same as or larger than the neck portion 4 when viewed in horizontal section.

A protrusion generally designated 12 is provided approximately at the center of the recess 8 . The protrusion 12 is formed so that its vertical cross section is non-circular, and although it is oval in the embodiment shown in the drawings, it can prevent rotation of the handle when combined with a handle, which will be described in detail later. The shape may be any shape, such as an ellipse, an oval, a triangle, a quadrilateral, a pentagon, or other polygons. This protrusion 1
2 is integrally molded with the recess 8 and other parts of the container body by blow molding or stretch blow molding, and a cylindrical part 13 extending outward with small intervals is located at the tip of the cylindrical part. and a flange portion 14 increasing in size in the transverse direction.
and a distal end surface 15 which is closed at the flange, and is hollow inside. In this embodiment, as shown in FIGS. 4 and 5, the distal end surface 15 of the protrusion is formed as a concave surface, so that when the protrusion 12 is molded, the flange 1 is clearly and fully bulged in the transverse direction.
4 is formed.

Further, the root surface 16 of the protrusion 12 is provided via a step 18 closer to the axis than the part 17 with the smallest diameter (distance 11f from the axis) of the side surface 10 of the recess.
It will also be obvious that a groove 19 is formed between the lower end of the cylindrical portion 13 of No. 2 and the recess 8 for more firmly fixing the handle.

In Figures 6.7 and 8 showing the handle of the container of the present invention, the handle 2 has an endless gripping part 20 and an endless mounting part 21 integrally molded by injection molding of synthetic resin.
It consists of. The grip part 20 has a convex part 22 for preventing slipping.
It consists of a vertical part 24, an upper curved part 25, and a lower curved part 26, in which recessed parts 23 and 23 are alternately arranged inside at small intervals, and are continuous with the mounting part 21 via these curved parts 25 and 26, and the whole As shown in FIG. 6, a ring is formed. As shown in FIG. 7, the attachment part 21 also forms a ring so as to be located in a plane substantially perpendicular to the plane containing the attachment part 21, and the ring of the attachment part 21 is connected to the container body protrusion 12. It has a similar shape to the cylindrical portion 13 of , and has an inner circumferential dimension substantially equal to the outer circumferential dimension of the cylindrical portion 13 .

In FIG. 1 for explaining the state in which the container body and handle are combined, the protrusion 12 of the container body 1 is inserted into the ring-shaped attachment part 21 of the handle 2, and the tip of the protrusion 12 is widened. By becoming the flange part 14, the ring-shaped attachment part 21 engages with the flange part 14.
The handle 2 is fixed (radially fixed) to the container body 1. A groove 19 is formed at the base of the protrusion 12, and this groove 19
When the ring-shaped attachment part 21 is accommodated within the ring-shaped attachment part 21, the ring-shaped attachment part 21 is effectively fixed in the radially perpendicular direction, and wobbling is also prevented. Furthermore, since the protrusion 12 and the attachment part 21 are non-circular, rotation between them is effectively prevented.

In the synthetic resin container with a handle of the present invention, the handle is manufactured in advance by injection molding, the handle is inserted into a blow mold,
In addition, the preform for the container body is blow molded or stretch blow molded in a blow mold (insert blow molding method), or the preform for the container body is blow molded or stretch blow molded in a blow mold in advance to form the container. It is manufactured by a method of manufacturing a main body, inserting this container main body into an injection mold, and injection molding a handle resin (insert injection molding method).

In FIG. 9 for explaining this insert blow molding method, in an injection molding step (A), first, a handle 2 in which a grip part 20 and a mounting part 21 are each endlessly integrated is inserted by injection molding of resin. In the first step (B) of the blow molding process, the handle 2 is placed in a blow mold 29 equipped with a blow cavity 27 and an insert cavity 28.
At the same time, a container body forming preform 30 maintained at the stretching temperature is inserted into the blowing cavity 27.
hold. With the blow mold 29 closed, a stretching rod (not shown) is pushed into the preform 30 to arch-stretch the preform 30 in the axial direction, and high-pressure fluid is blown into the preform 30 to shape the container. Form into. At this stage, the projection 12 is formed so as to be inserted into the attachment part 21 of the handle 2, but the flange 14 is not formed yet. Finally, in the final stage (C) of the blow molding process, the tip of the protrusion is moved in the axial direction of the container using the push pin 31 that is slidably provided in the blow mold 29 while the blow molding pressure still remains. The flange portion 14 is formed at the tip of the projection portion 12 by pressing. Thus, a strong integration of the stretch blow molded container and the injection molded handle is formed, which can be removed by opening the blow mold 29.

In FIGS.
It can be opened and closed in a direction perpendicular to this plane. A handle cavity 28 is provided within this parting surface 32, and a blowing cavity 27 is also provided substantially symmetrically with respect to this parting surface 32.

The gripping part 20 and the mounting part 21 of the handle 2 are the 11th and 12th
As shown in the figure, they are held by blow molds 29a and 29b in the positional relationship described below. That is, the ring-shaped attachment part 2
There is a cavity surface 33 for forming a cylindrical portion at small intervals extending on both sides through the inner circumference of the cavity surface 33, and a cavity surface 34 for forming a flange portion on the gripping portion side of this cavity surface 33, and a cavity surface for forming a concave portion on the opposite side thereof. There are 35.

Cavities 33 for forming protrusions of blow molds 29a and 29b
, 34, 35, a horizontal notch 36 is formed, and a sliding member 37 is provided within this notch 36, which is slidable toward these cavities. This sliding member 37 has a support arm portion 38 and a bracket 39 that are spaced apart from each other, and the support arm portion 38 is provided with a push pin 40 on the cavity side. The push-in pin 40 has a similar shape to the flange forming cavity surface 34, but its outer circumferential dimension is slightly smaller than the inner circumferential dimension of the cavity surface, and its tip surface 41 is convex. The support arm portion 38 and the push-in pin 40 are of a blow type 29a.

It is located between the grip part 20 supported by 29b and the attachment part 21, and is located in such a positional relationship that the push-in pin 40 contacts the flange part forming cavity surface 34 and closes the cavity surface 34 when actually purchased. The bracket 39 is located outward from the grip portion 20, and at least a portion thereof is of the blow type 29a,
It is provided so as to be located outward from 29b.

To drive the pusher pin 40, a series of drive mechanisms are provided, namely an electromagnetic solenoid or fluid cylinder mechanism 42 and a linkage mechanism 43 for transmitting the reciprocating motion of the mechanism to the pusher pin 4o. More specifically, one split mold 29a
A frame 44 is fixed to the frame 44, and a link or lever 43 is provided on the frame 44 so as to be swingable via a fulcrum 45. A pivot 4 is attached to one end of the link or lever 43.
6 to the bracket 39, and the other end is connected to the movable rond 48 of the reciprocating drive mechanism 42 via a pivot 47.
connected to. Thus, when the reciprocating drive 42 is activated,
The link or lever 43 rotates, the sliding member 37 slides, and the push pin 4° is inserted into the flange forming cavity 34.
It is designed to be pushed inside.

Now, in the state shown in Fig. 12, the preform (
When stretch blow molding (not shown) is performed, a recess (FIG. 3, 10) in the container body is formed by the cavity surface 35 for forming a recess due to fluid pressure, and then the cavity surface 33, 34 for forming a protrusion and the indentation are formed. A closed protrusion 12 is formed on the outer surface 41 of the pin. When the reciprocating drive mechanism 42 is operated while blow molding pressure is applied to this hollow body, the push pin 40 is pushed into the protrusion 12, thereby forming a flange portion with increased dimensions. .

In FIG. 13 for explaining the insert injection molding method, the preform is stretch blow molded in the blow mold 29 in the first stage (A) of the blow molding process in the same manner as in FIG. 9 (B). Manufacture hollow bodies. In this case, the protrusion 12
No flange portion has been formed yet. - Next, in the final stage (B) of the blow molding process, the push pin 31 is pushed in while blow pressure is applied inside the hollow body. As a result, the tip of the projection 12 is expanded to form a flange 14. As a result, the blow mold 29 is opened and the container body 1 is taken out.

Next, in the injection step (C), the injection mold 49 includes a container body cavity 27 and a handle cavity 28. The container body 1 is inserted into the cavity 27 and the mold is clamped. A nozzle 50 is attached to the container body 1, and fluid pressure can be applied inside the container body so that the container body is not deformed by the injection pressure. Injection machine 51 to injection mold 49
A handle resin is injected into the cavity 28 through the gate 52 to form a handle combined with the container body 1. The protrusion 12 of the container body 1 can be formed using the mechanism shown in FIGS. 10 to 12, except that the handle cavity is omitted.

In the present invention, as the resin constituting the container body, any resin can be used as long as it is a blow moldable resin, especially a thermoplastic resin whose molecules can be oriented by stretching.

Such resins include polyethylene terephthalate (
PET), thermoplastic polynystyl such as polybutylene terephthalate; polycarbonates; acrylic-butadiene-styrene copolymer (ABS resin); polyacetal resin; nylons such as nylon 6, nylon 66, and copolymerized nylon thereof; polymethyl methacrylate Acrylic resins such as: isotaftic polypropylene;
Examples include polystyrene. On the other hand, the resin for forming the handle may be the same as or different from the resin for forming the container body.
Examples include medium-density polyethylene or high-density polyethylene, ethylene-propylene copolymer, ethylene-butene-1 copolymer, and styrene-butadiene thermoplastic elastomer. It goes without saying that various colorants, fillers, etc. can be added to the resin for forming the handle.

In the present invention, the blow preform molding and stretch blow molding can be carried out by methods known per se, except for the above-mentioned characteristics. For example, blow preforms are made by injecting the above-mentioned resin into an injection mold.
It is obtained by cooling this to a supercooled state (amorphous state).

In order to blow mold this preform, a method is employed in which the preform is preheated to a stretching temperature and then pulled and stretched in the axial direction in a blow mold, and expanded and stretched in the circumferential direction. In the case of PET, the stretching temperature is generally 80 to 1
It is within the range of 30°C.

Injection of the resin for forming the handle differs depending on the type of resin, but generally the temperature is 180 to 280°C, particularly 220 to 260°C.
A temperature of 0° C. is suitable, and an injection pressure for this resin is generally in the range of 15 to 40 kg/cm' (gauge), particularly 20 to 30 kg/cm' (gauge).

Pressurized gas is introduced into the container during injection of the handle-forming resin in order to prevent the container from being deformed by the resin injection pressure.The applied pressure is 20 to 45 Kg/cm2 (gauge), especially It is preferable that the pressure is 25 to 35 Kg/c+n” (gauge) and higher than the injection pressure of the resin.
The surface of the injection mold is preferably cooled to about 5 to 20°C.

The above description shows one embodiment of the present invention,
The invention is not limited to this example in any way. For example, it will be obvious to those skilled in the art that instead of stretch blow molding, a blow molding method (melt blow method), which is easier to perform, can be used.

(Effects of the Invention) According to the present invention, a recess is provided in a part of the body of the container body so that the deepest recess has a diameter that is approximately the same as or slightly larger than the neck; approximately at the center of this recess. The protrusion is provided so that the cross section is not a perfect circle; the gripping part and the attachment part are endless, and the attachment part is a ring having a similar shape to the protrusion of the container body; and the container body. The following effects are achieved by inserting the protrusion into the ring of the attachment part and forming a structure in which the tip of the protrusion is flared outward.

In other words, a recess is formed in the body so that the recess has a diameter that is approximately the same as or slightly larger than that of the neck, and a protrusion is formed approximately in the center of the recess. During stretch blow molding, the recesses and protrusions mentioned above are close to the parison wall, so they remain thicker than the other walls of the body, and as a result, the protrusions for attaching the handle and the protrusions that support these protrusions are The concave portion creates a strong structure that is less likely to deform. In addition, by inserting this protrusion into the ring shape of the handle and expanding its tip outward to form a flange shape, the handle is prevented from coming off, and the cross-sectional shape of the protrusion is made non-circular. This also suppresses relative rotation between the handle and the container body. In particular, when the tip of the protrusion is formed as a concave surface, the outward protrusion of the flange-like portion is large in size and is securely performed, making it possible to prevent the handle from being pulled out and to secure it even more securely. becomes.

As a result, the handle can be securely and firmly fixed to the container.

In addition, since the gripping part and the attachment part of the handle are each provided in the form of an endless ring, the handle has a relatively low basis weight and is strong, so it does not damage the appearance of the container and does not damage the product. can increase value.

Furthermore, since the attachment part of the handle is located near the center of the container, that is, close to the center of gravity, when the handle is gripped even when the container is filled with liquid, the moment applied to the attachment part and the grip part is reduced. It is small and easy to hold, and requires little force. Further, since the handle is formed in the recess of the container and the grip portion is an endless ring, it is easy to insert a hand into the container.

Furthermore, since the gripping portion of the handle is provided inward from the outermost surface of the container body, it can be stored compactly within the case, which has the advantage of requiring less space for storage, transportation, etc.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a side view of a synthetic resin container with a handle of the present invention, FIG. 2 is a side view showing only the container body of FIG. 1, and FIG. is a side view showing the container main body in FIG. 2 rotated by 90 degrees, FIG. 4 is a sectional view taken along line A-A in FIG. 2, and FIG. 5 is a cross-sectional view taken along line B-B in FIG. 2. 6 is a side view showing only the handle in FIG. 1, FIG. 7 is a side view showing the handle in FIG. 6 rotated by 270 degrees, and FIG. 8 is a side view showing the handle in FIG. 7 is a sectional view taken along the line A-A in FIG. 7, FIG. 9 is an explanatory diagram showing the insert blow molding method of the present invention, and FIG. 10 is a side view showing an example of a blow-type push-in pin and its drive mechanism. 11 is a cross-sectional view taken along line AA of the device shown in FIG. 10, FIG. 12 is a cross-sectional view taken along line B-B of the device shown in FIG. 10, and FIG. 13 is an insert of the present invention. It is an explanatory view showing an injection molding method. 1 is the container body, 2 is the handle, 4 is the neck, 5 is the body, 6 is the bottom, 8 is the recess, 12 is the protrusion, 14 is the flange, 15
is the tip end surface, 20 is the gripping part, 21 is the ring-shaped attachment part, 31
and 40 indicate push-in pins, respectively. (CB) (C) (A) (A) (C) (B) Soviet Union Procedural Manual (Spontaneous)

Claims (4)

[Claims] (1) Equipped with a neck, a body, and a closed base that are integrally molded by blow molding or stretch blow molding of synthetic resin, and a part of the body has a recessed part that is approximately the same as the neck or slightly larger than the neck. A container body having a concave portion having a diameter and a protrusion having a non-perfect circular cross section approximately at the center of the concave portion; Endless integrally molded by injection molding of synthetic resin. a handle comprising a gripping part and a mounting part, and the mounting part is a ring having a similar shape to the projection; the projection of the container body is inserted into the ring of the mounting part, and the projection 1. A synthetic resin container with a handle, characterized in that the handle is fixed to the container body by having a structure in which the tip of the container is expanded into a flange shape. (2) The container according to claim 1, wherein the tip end surface of the protrusion is formed as a concave surface. (3) A synthetic resin parison is placed in a blow mold, and is provided with a neck, a body, and a closed bottom, and a part of the body is molded so that the recessed part has a diameter that is approximately the same as or slightly larger than the neck. A step of blow molding or stretch blow molding a container body having a recess provided in the recess and a protrusion provided approximately in the center of the recess so as to have a non-perfect circular cross section; pressing the protrusion with a push pin; a step of forming a flange at the tip of the protrusion; and inserting the container body with the flange formed into an injection mold, injecting synthetic resin, and forming an endless gripping portion and a mounting portion; A method for producing a synthetic resin container with a handle, comprising: forming a handle in the form of a ring surrounding the protrusion between the flange and the recess. (4) A process of molding a handle that has an endless gripping part and a mounting part, and the mounting part has a non-perfect circular shape, by injection molding of synthetic resin; while inserting the handle into a blow mold, A parison is placed in a blow mold, and has a neck, a body, and a closed base, and a recess is provided in a part of the body so that the most recessed part has a diameter that is approximately the same as or slightly larger than the neck. , a step of blow molding or stretch blow molding a container body having a protrusion provided so as to fit the ring into the approximate center of the recess; and pressing the protrusion with a push pin to the tip of the protrusion. A method for manufacturing a synthetic resin container with a grip, comprising: forming a flange;